Method for sideline transmission and terminal device

Abstract

The invention provides a method for sideline transmission and terminal equipment. The method comprises: a first terminal device determines a transmission resource of a first PSFCH; wherein the transmission resource of the first PSFCH comprises one or more of the following: a common comb tooth occupied by the first PSFCH; and a proprietary RB occupied by the first PSFCH. Based on the application, the first terminal device can determine the transmission resource of the PSFCH in the unlicensed spectrum based on the comb tooth structure. Therefore, when the resource of the sidewalk feedback channel is determined, the comb tooth structure related to the unlicensed spectrum is considered, so that the requirement of the unlicensed spectrum and the transmission requirement of the sidewalk feedback information are considered.

Description

Method and terminal device for sideline transmission

[0001] This application claims priority to PCT patent application filed with the International Bureau of the World Intellectual Property Organization on August 11, 2023, with application number PCT / CN2023 / 112650 and application name “Method and terminal device for side transmission”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of communication technology, and more particularly, to a method for sideline transmission and a terminal device. Background Art

[0003] Some sideline communication systems incorporate sideline feedback channels to improve sideline communication reliability. For example, in unicast communication, a transmitting terminal device can send sideline data to a receiving terminal device, and a receiving terminal device can send sideline feedback information to the transmitting terminal device. This sideline feedback information can be carried on the sideline feedback channel.

[0004] With the development of technology, sidelink communication technology is applied to unlicensed spectrum. In unlicensed spectrum communication, how to determine the resources of the sidelink feedback channel is still unclear.

[0005] Summary of the Invention

[0006] The present application provides a method and terminal device for sideline transmission. The following introduces various aspects involved in the present application.

[0007] In a first aspect, a method for sidelink transmission is provided, the method comprising: a first terminal device determining a transmission resource of a first physical sidelink feedback channel (PSFCH); wherein the transmission resource of the first PSFCH comprises one or more of the following: a common comb occupied by the first PSFCH; and a dedicated resource block (RB) occupied by the first PSFCH.

[0008] According to the second aspect, a terminal device is provided, which is a first terminal device, and the terminal device includes: a determination unit for determining the transmission resources of the first PSFCH; wherein the transmission resources of the first PSFCH include one or more of the following: a common comb occupied by the first PSFCH; and a dedicated RB occupied by the first PSFCH.

[0009] In a third aspect, a terminal device is provided, comprising a processor and a memory, wherein the memory is used to store one or more computer programs, and the processor is used to call the computer program in the memory so that the terminal device executes some or all of the steps in the method of the first aspect.

[0010] In a fourth aspect, an embodiment of the present application provides a communication system, which includes the above-mentioned terminal device. In another possible design, the system may also include other devices that interact with the terminal device in the solution provided in the embodiment of the present application.

[0011] In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program, and the computer program enables a terminal device to execute part or all of the steps in the methods of the above aspects.

[0012] In a sixth aspect, embodiments of the present application provide a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, wherein the computer program is operable to cause a terminal device to perform some or all of the steps of the methods described in each of the above aspects. In some implementations, the computer program product may be a software installation package.

[0013] In the seventh aspect, an embodiment of the present application provides a chip, which includes a memory and a processor. The processor can call and run a computer program from the memory to implement some or all of the steps described in the methods of the above aspects.

[0014] Based on this application, the first terminal device can determine the transmission resources of the PSFCH in the unlicensed spectrum based on the comb structure. Therefore, when determining the resources of the side feedback channel, this application takes into account the comb structure involved in the unlicensed spectrum, thereby taking into account both the requirements of the unlicensed spectrum and the transmission requirements of the side feedback information. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] FIG1 is a diagram illustrating an example of a system architecture of a wireless communication system to which an embodiment of the present application may be applied.

[0016] FIG2 is an example diagram of a side communication scenario within network coverage.

[0017] FIG3 is an example diagram of a side communication scenario with partial network coverage.

[0018] FIG4 is an example diagram of a side communication scenario outside network coverage.

[0019] FIG5 is a diagram showing an example of a side communication scenario based on a central control node.

[0020] FIG6 is an example diagram of a sideline communication method based on broadcasting.

[0021] FIG7 is an example diagram of a unicast-based sideline communication method.

[0022] FIG8 is an example diagram of a side communication method based on multicast.

[0023] FIG9 is a diagram illustrating an example of side feedback information transmission in unicast communication.

[0024] FIG10 is a schematic diagram of a time slot structure of sideline communication.

[0025] FIG11 is an example diagram of PSFCH feedback with a period of 4.

[0026] FIG12 is an example diagram showing a correspondence between a PSFCH transmission resource subset and a PSSCH transmission resource.

[0027] FIG13 is an example diagram of a PSFCH resource index.

[0028] FIG14 is a schematic diagram of an RB set.

[0029] FIG15 is an example diagram of a comb-based resource configuration.

[0030] FIG16 is a diagram showing an example of a frame structure.

[0031] FIG17 is another example diagram of a frame structure.

[0032] FIG18 is an example diagram of time slot positions corresponding to a PSFCH transmission opportunity.

[0033] FIG19 is a schematic flowchart of a method for side transmission provided in an embodiment of the present application.

[0034] FIG20 is a schematic diagram of frequency domain resources for a PSFCH transmission opportunity.

[0035] Figure 21 is an example diagram of the transmission resources of the first PSFCH and the third PSFCH provided in an embodiment of the present application.

[0036] Figure 22 is a schematic structural diagram of a terminal device 2200 provided in an embodiment of the present application.

[0037] Figure 23 is a schematic structural diagram of a device for communication provided in an embodiment of the present application. DETAILED DESCRIPTION

[0038] The technical solution in this application will be described below with reference to the accompanying drawings.

[0039] Communication system architecture

[0040] FIG1 is a diagram illustrating an exemplary system architecture of a wireless communication system 100 to which embodiments of the present application may be applied. The wireless communication system 100 may include a network device 110 and a terminal device 120. The network device 110 may be a device that communicates with the terminal device 120. The network device 110 may provide communication coverage for a specific geographic area and may communicate with the terminal device 120 within the coverage area.

[0041] FIG1 exemplarily shows a network device and a terminal device. Optionally, the wireless communication system 100 may include one or more network devices 110 and / or one or more terminal devices 120. For a network device 110, the one or more terminal devices 120 may all be located within the network coverage of the network device 110, or all be located outside the network coverage of the network device 110, or some may be located within the coverage of the network device 110 and others outside the network coverage of the network device 110. This is not limited in the embodiments of the present application.

[0042] Optionally, the wireless communication system 100 may further include other network entities such as a network controller and a mobility management entity, which is not limited in the embodiment of the present application.

[0043] It should be understood that the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: fifth generation (5G) system or new radio (NR), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), etc. The technical solutions provided in this application can also be applied to future communication systems, such as the sixth generation mobile communication system, satellite communication system, etc.

[0044] The terminal device in the embodiment of the present application may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), mobile terminal (MT), remote station, remote terminal device, mobile device, user terminal, wireless communication device, user agent or user device. The terminal device in the embodiment of the present application may be a device that provides voice and / or data connectivity to a user, and can be used to connect people, objects and machines, such as a handheld device with wireless connection function, a vehicle-mounted device, etc. The terminal device in the embodiment of the present application may be a mobile phone, a tablet computer (Pad), a laptop computer, a PDA, a mobile internet device (MID), a wearable device, a vehicle, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc. For example, a terminal device can act as a dispatching entity, providing sidelink signals between terminal devices in vehicle-to-everything (V2X) or device-to-device (D2D) communications. For example, a cell phone and a car can communicate with each other using sidelink signals. A cell phone and a smart home device can also communicate without relaying the communication signal through a base station. Alternatively, the terminal device can be used to act as a base station.

[0045] The network device in the embodiments of the present application may be a device for communicating with a terminal device, and may also be referred to as an access network device or a radio access network device. For example, the network device may be a base station. The network device in the embodiments of the present application may refer to a radio access network (RAN) node (or device) that connects a terminal device to a wireless network. A base station may broadly cover various names as follows, or be replaced with the following names, such as: NodeB, evolved NodeB (eNB), next generation NodeB (gNB), relay station, access point, transmitting and receiving point (TRP), transmitting point (TP), master station MeNB, secondary station SeNB, multi-standard radio (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. A base station may be a macro base station, a micro base station, a relay node, a donor node, or the like, or a combination thereof. A base station may also refer to a communication module, modem, or chip used to be set in the aforementioned device or apparatus. A base station may also be a mobile switching center and a device that performs base station functions in device-to-device D2D, V2X, or machine-to-machine (M2M) communications, a network-side device in a 6G network, or a device that performs base station functions in future communication systems. A base station may support networks with the same or different access technologies. The embodiments of this application do not limit the specific technology and specific device form used by network devices.

[0046] Base stations can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move based on the location of the mobile base station. In other examples, a helicopter or drone can be configured to act as a device that communicates with another base station.

[0047] In some deployments, the network device in the embodiments of the present application may refer to a CU or a DU, or the network device may include a CU and a DU. The gNB may also include an AAU.

[0048] The network equipment and terminal devices can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed in the air on aircraft, balloons, and satellites. The embodiments of this application do not limit the scenarios in which the network equipment and terminal devices are located.

[0049] Sideline communication under different network coverage conditions

[0050] Sidelink communication refers to a communication technology based on a sidelink (SL, also known as a direct link). Sidelink communication can be, for example, device-to-device (D2D) or vehicle-to-everything (V2X) communication. In traditional cellular systems, communication data is received or sent between terminal devices and network devices, while sidelink communication supports direct communication data transmission between terminal devices. Compared with traditional cellular communications, direct communication data transmission between terminal devices can have higher spectrum efficiency and lower transmission latency. For example, the vehicle networking system adopts sidelink communication technology.

[0051] In side communication, according to the network coverage of the terminal device, the side communication can be divided into side communication within the network coverage, side communication with partial network coverage, and side communication outside the network coverage.

[0052] Figure 2 illustrates an example scenario for sidelink communication within network coverage. In the scenario shown in Figure 2, both terminal devices 120a are within the coverage of network device 110. Therefore, both terminal devices 120a can receive configuration signaling from network device 110 (configuration signaling in this application can also be replaced by configuration information) and determine the sidelink configuration based on the configuration signaling from network device 110. After both terminal devices 120a have configured their sidelinks, sidelink communication can proceed on the sidelink.

[0053] Figure 3 is an example diagram of a sidelink communication scenario with partial network coverage. In the scenario shown in Figure 3, terminal device 120a performs sidelink communication with terminal device 120b. Terminal device 120a is located within the coverage range of network device 110, so terminal device 120a can receive the configuration signaling of network device 110 and determine the sidelink configuration based on the configuration signaling of network device 110. Terminal device 120b is located outside the network coverage and cannot receive the configuration signaling of network device 110. In this case, terminal device 120b can determine the sidelink configuration based on pre-configuration information and / or information carried in the physical sidelink broadcast channel (PSBCH) sent by terminal device 120a within the network coverage. After both terminal device 120a and terminal device 120b perform sidelink configuration, sidelink communication can be performed on the sidelink.

[0054] Figure 4 illustrates an example scenario for sidelink communication outside of network coverage. In the scenario shown in Figure 4, both terminal devices 120b are outside of network coverage. In this scenario, both terminal devices 120b can determine the sidelink configuration based on pre-configured information. After both terminal devices 120b have configured their sidelinks, sidelink communication can proceed over the sidelink.

[0055] Sideline communication based on central control node

[0056] Figure 5 is an example diagram of a sideline communication scenario based on a central control node. In this sideline communication scenario, multiple terminal devices can form a communication group, and the communication group has a central control node. The central control node can be a terminal device in the communication group (such as terminal device 1 in Figure 5), and the terminal device can also be called a cluster head (CH) terminal device. The central control node can be responsible for completing one or more of the following functions: establishing a communication group, joining and leaving group members of the communication group, coordinating resources within the communication group, allocating sideline transmission resources to other terminal devices, receiving sideline feedback information from other terminal devices, and coordinating resources with other communication groups.

[0057] Sideline communication mode

[0058] Some standards or protocols (such as the 3rd Generation Partnership Project (3GPP)) define two sideline communication modes: a first mode and a second mode.

[0059] In the first mode, the resources of the terminal device (the resources mentioned in this application may also be referred to as transmission resources, such as time-frequency resources) are allocated by the network device. The terminal device can send data on the side link according to the resources allocated by the network device. The network device can allocate resources for a single transmission to the terminal device, or it can allocate resources for semi-static transmission to the terminal device. This first mode can be applied to scenarios covered by a network device, such as the scenario shown in Figure 2 above. In the scenario shown in Figure 2, the terminal device 120a is within the network coverage of the network device 110, so the network device 110 can allocate resources used in the side transmission process to the terminal device 120a.

[0060] In the second mode, the terminal device can autonomously select one or more resources from a resource pool (RP). The terminal device can then perform side transmission based on the selected resources. For example, in the scenario shown in FIG4 , the terminal device 120b is located outside the cell coverage area. Therefore, the terminal device 120b can autonomously select resources from a pre-configured resource pool for side transmission. Alternatively, in the scenario shown in FIG2 , the terminal device 120a can also autonomously select one or more resources from a resource pool configured by the network device 110 for side transmission.

[0061] Data transmission method of side communication

[0062] Some sidewalk communication systems (such as long-term evolution vehicle to everything (LTE-V2X)) support broadcast-based data transmission (hereinafter referred to as broadcast transmission). For broadcast transmission, the receiving terminal can be any terminal device around the transmitting terminal. Taking Figure 6 as an example, terminal device 1 is the transmitting terminal, and the receiving terminal corresponding to the transmitting terminal is any terminal device around terminal device 1, for example, terminal device 2 to terminal device 6 in Figure 6.

[0063] In addition to broadcast transmission, some communication systems also support unicast-based data transmission (hereinafter referred to as unicast transmission) and / or multicast-based data transmission (hereinafter referred to as multicast transmission). For example, the new radio vehicle to everything (NR-V2X) hopes to support autonomous driving. Autonomous driving places higher requirements on data interaction between vehicles. For example, data interaction between vehicles requires higher throughput, lower latency, higher reliability, larger coverage, more flexible resource allocation, etc. Therefore, in order to improve the performance of data interaction between vehicles, NR-V2X introduces unicast transmission and multicast transmission.

[0064] For unicast transmission, there is typically only one receiving terminal. For example, in Figure 7, unicast transmission occurs between terminal devices 1 and 2. Terminal device 1 can be the sending terminal, and terminal device 2 can be the receiving terminal, or vice versa.

[0065] For multicast transmission, the receiving terminal can be a terminal device within a communication group, or a terminal device within a certain transmission distance. For example, in Figure 8, terminal devices 1, 2, 3, and 4 form a communication group. If terminal device 1 sends data, all other terminal devices in the group (terminal devices 2 through 4) can be receiving terminals.

[0066] Side Feedback Channel

[0067] Some sidelink communication systems (such as NR-V2X systems) introduce sidelink feedback channels to improve the reliability of sidelink communication. Figure 9 takes unicast communication as an example for illustration. The transmitting terminal device can send sidelink data (for example, including a physical sidelink control channel (PSCCH) and / or a physical sidelink shared channel (PSSCH)) to the receiving terminal device; the receiving terminal device can send sidelink feedback information to the transmitting terminal device. The sidelink feedback information can be carried in a sidelink feedback channel (such as PSFCH). The sidelink feedback information may include hybrid automatic repeat request (HARQ) feedback information. The HARQ feedback information may include acknowledgment (ACK) or negative acknowledgment (NACK). The transmitting terminal device can determine whether retransmission is required based on the sidelink feedback information.

[0068] Sideline feedback can be activated or deactivated through pre-configuration information or network configuration information, and can also be activated or deactivated by the transmitting terminal device. If the sideline feedback is activated, the receiving terminal device receives the sideline data sent by the transmitting terminal device, and feeds back the sideline feedback information to the transmitting terminal based on the detection result. The transmitting terminal device decides to send retransmitted data or new data based on the received sideline feedback information. If the sideline feedback is deactivated, the receiving terminal device does not need to send sideline feedback information, and the transmitting terminal device can send data in a blind retransmission manner. For example, the transmitting terminal device can repeat each sideline data K times instead of deciding whether to send retransmitted data based on the sideline feedback information sent by the receiving terminal device.

[0069] Format of the side feedback channel

[0070] As mentioned above, in some sideline communication systems, a sideline feedback channel is introduced to carry sideline feedback information. The following uses the PSFCH as an example to illustrate the sideline feedback channel.

[0071] In some sideline communication systems (such as NR-V2X systems), PSFCH only carries 1 bit of HARQ-ACK information. The HARQ-ACK information occupies 2 time domain symbols in the time domain. Among them, the second symbol carries sideline feedback information. The data on the first symbol is a copy of the data on the second symbol. The first symbol is usually used as automatic gain control (AGC) at the receiving end. The HARQ-ACK information occupies 1 RB in the frequency domain. In a time slot, the structure of PSFCH and PSSCH / PSCCH can be shown in Figure 10. Figure 10 schematically shows the positions of the time domain symbols occupied by PSFCH, PSCCH, and PSSCH in a time slot. In a time slot, the last symbol is used as a guard period (GP), the second to last symbol is used for PSFCH transmission, the third to last symbol data is the same as the data of the PSFCH symbol, used for AGC, and the fourth to last symbol is also used as GP. The first symbol in the time slot is used as AGC, and the data on this symbol is the same as the data on the second time domain symbol in the time slot. In this time slot, the PSCCH occupies 3 time domain symbols, and the remaining symbols can be used for PSSCH transmission.

[0072] Resources of the side feedback channel

[0073] To reduce PSFCH channel overhead, one of every P time slots is defined as containing PSFCH transmission resources. This means that the period of the sidelink feedback resource is P time slots. P can satisfy P = {1, 2, 4}. The parameter P can be pre-configured or network-configured.

[0074] Figure 11 is an example diagram of PSFCH feedback for P=4. As shown in Figure 11, the minimum time interval between a PSSCH and its associated PSFCH is 2 time slots. Therefore, the feedback information of the PSSCH transmitted in time slots 3, 4, 5, and 6 is all transmitted in time slot 8. The feedback information of the PSSCH transmitted in time slots 7, 8, 9, and 10 is all transmitted in time slot 12. In Figure 11, time slots {3, 4, 5, 6} can be regarded as one time slot set, and {7, 8, 9, 10} can be regarded as another time slot set. The PSFCH corresponding to the PSSCH transmitted in each time slot in the time slot set is in the same time slot. It should be understood that Figure 11 schematically shows the time domain positions of PSSCH and PSFCH when a time slot includes PSSCH and PSFCH, and does not reflect the last GP symbol in the time slot.

[0075] The following uses the NR-V2X system as an example to illustrate how related technologies determine side traffic feedback resources.

[0076] Sidelink feedback resources can be determined based on the following information: the timeslot and subchannel information for the PSSCH, source ID information, and target ID information. Specifically, the PSFCH transmission resource set is divided into multiple subsets based on the PSFCH period parameter in the resource pool configuration information and the number of subchannels available for PSSCH transmission. The PSFCH transmission resources in each subset correspond to PSSCH transmissions in one timeslot and one subchannel. Furthermore, the specific PSFCH transmission resources within this subset are determined based on the source ID information and target ID information.

[0077] For a resource pool, if the PSFCH period is represented by P (as determined by the parameter sl-PSFCH-Period), the parameter P; the resource pool includes N subch (as determined by the parameter sl-NumSubchannel) subchannels, the number of RBs, i.e., physical resource blocks (PRBs), included in the configured PSFCH transmission resource set is (If determined according to sl-PSFCH-RB-Set), the number of RBs available for PSFCH transmission corresponding to one PSSCH subchannel in one time slot is:

[0078] For the PSSCH transmitted on the jth subchannel in the i-th time slot, the available RBs for the corresponding PSFCH can be:

[0079] in,

[0080] These RBs constitute a PSFCH transmission resource subset. Figure 12 is an example diagram of the correspondence between the PSFCH transmission resource subset and the PSSCH transmission resource. As shown in Figure 12, the PSFCH period is 4 time slots, that is, one PSFCH time slot corresponds to 4 PSSCH time slots. The resource pool includes 2 subchannels. The resource pool configuration information configures 16 RBs for transmitting PSFCH. Therefore, one subchannel in a time slot corresponds to two PSFCH RBs. The correspondence between the PSSCH subchannels and the PSFCH RBs is in the order of first the time domain and then the frequency domain. As shown in Figure 12, subchannel 0 in time slot 0 corresponds to RB0 and RB1 of PSFCH, subchannel 0 in time slot 1 corresponds to RB2 and RB3 of PSFCH, and so on.

[0081] The number of PSFCHs that can be code-division multiplexed (CDM) in one RB is determined by the parameter Determine. Among them, a cyclic shift pair represents a pair of cyclic shift values ​​used to carry ACK or NACK, or in the case of negative acknowledgment (NACK-only) feedback (that is, the receiving end only feeds back NACK when it needs to feed back NACK, and if the receiving end determines that it is ACK, then there is no need to feed back), a cyclic shift used to carry NACK (at this time there is no cyclic shift used to carry ACK). In the PSFCH transmission resource set corresponding to a PSSCH subchannel, the PSFCH transmission resources are indexed in the frequency domain first and then in the code domain. Figure 13 is an example diagram of a PSFCH resource index. In Figure 13, N is used PRB,CS In FIG13 , the PSFCH transmission resource set includes S RBs, each RB includes Q cyclic shift pairs, and all PSFCH transmission resource indexes are shown in FIG13 .

[0082] NR-V2X introduces two methods for determining PSFCH transmission resources based on PSSCH transmission resources. The choice of which method is indicated by the resource pool configuration parameters. The first method: PSFCH transmission resources are determined based on the starting subchannel index occupied by PSSCH; the second method: PSFCH transmission resources are determined based on the indices of all subchannels occupied by PSSCH.

[0083] The transmission resource set of PSFCH corresponding to a PSSCH channel is:

[0084] in, Indicates the number of cyclic shift pairs supported within a PSFCH RB; for the first method above For the second method mentioned above The number of subchannels occupied by the PSSCH. One PSSCH corresponds to PSFCH transmission resources, the terminal device determines the transmission resource corresponding to the PSSCH in the PSFCH transmission resource set according to the following formula:

[0085] Among them, P ID Indicates the ID information of the terminal device sending PSSCH, that is, the source ID carried in the sidelink control information (SCI) format 2-A or SCI format 2-B. For the first sidelink feedback mode in multicast communication (i.e., the receiving end feeds back ACK or NACK information), M ID M is the member ID of the receiving terminal in the communication group. This ID information is different from the target ID and RNTI information of the receiving terminal. The terminals in the communication group have a unique member ID. Therefore, the receiving terminal devices in the group can determine different PSFCH transmission resources based on this ID. For the second sideline feedback mode in unicast or multicast communication (i.e., the receiving terminal only feeds back NACK information), M ID =0.

[0086] Unlicensed spectrum

[0087] Unlicensed spectrum is spectrum designated by countries and regions for use by radio equipment. This spectrum is generally considered shared spectrum, meaning that as long as communications equipment meets national or regional regulatory requirements for the spectrum, it can use it without having to apply for exclusive spectrum authorization from the national or regional spectrum management agency. Unlicensed spectrum may also be referred to as shared spectrum, unlicensed spectrum, unlicensed spectrum, unlicensed frequency band, or unlicensed frequency band.

[0088] The use of unlicensed spectrum must comply with specific national and regional regulatory requirements. For example, communications devices can use unlicensed spectrum to access channels in the unlicensed spectrum through channel sensing, thereby avoiding conflicts with other communications devices or other communications systems (such as WiFi systems). As an implementation method, communications devices can use unlicensed spectrum based on the listen-before-talk (LBT) principle. This means that before transmitting signals on an unlicensed spectrum channel, a communications device must first sense the channel. Only when the channel sensing result indicates that the channel is idle can the communications device transmit signals. If the channel sensing result indicates that the channel is busy, the communications device cannot transmit signals. To ensure fairness, the duration of a communications device's transmission using an unlicensed spectrum channel during a transmission cannot exceed the maximum channel occupancy time (MCOT).

[0089] 3GPP Rel-16 studies NR-based access to unlicensed spectrum (NR-U). In NR-U, LBT methods can include type 1 LBT and type 2 LBT. The following describes each LBT method separately.

[0090] Type 1 LBT method

[0091] In the LBT method of type 1, based on the multi-slot channel detection with random backoff and adjustment of the contention window size, the communication device can initiate channel occupation with a length of Tmcot (for example, equal to the MCOT duration) according to the channel access priority p. For example, if the base station uses the LBT method of type 1, then after channel access, the base station can not only send the base station data, but also share the COT with the terminal device. Alternatively, if the terminal device uses the LBT method of type 1, then after channel access, the terminal device can not only send the terminal device data, but also share the COT with the base station. Table 1 shows the channel access priority of the terminal device when performing type 1 LBT and its corresponding channel access parameters.

[0092] Table 1

[0093] It should be noted that in Table 1, m p Refers to the number of fallback slots corresponding to the channel access priority p, CW p Refers to the contention window size corresponding to the channel access priority p, CW min,p Refers to the CW corresponding to the channel access priority p pMinimum value, CW max,p Refers to the CW corresponding to the channel access priority p p The maximum value, T mcot,p It refers to the maximum channel occupancy time corresponding to the channel access priority p.

[0094] In addition, it should be noted that for the four channel access priorities of type 1 in NR-U, p=1 is the highest priority.

[0095] Type 2 LBT method

[0096] Type 2 LBT is a channel access method based on a fixed-length channel listening time slot. Type 2 LBT can include Type 2A LBT, Type 2B LBT, and Type 2C LBT.

[0097] For Type 2A LBT, the communication device can perform a single-slot detection of the channel every 25 us, that is, the channel detection starts 25 us before data transmission. The 25 us detection includes a 16 us detection and a 9 us detection. If the channel is idle in both times, the communication device considers the channel idle and can access the channel.

[0098] For Type 2B LBT, communication devices can perform channel detection in a single time slot with a fixed length of 16 us. If the terminal device detects idle time of more than 4 us during the last 9 us, it considers the channel idle.

[0099] For Type 2C LBT, communication devices can directly transmit data without performing channel detection. Because the time difference between the current transmission and the previous transmission is less than 16us, it can be considered the same transmission, but the transmission duration of this transmission does not exceed 584us.

[0100] The sidelink unlicensed spectrum (SL-U) communication system can also support channel access mechanisms similar to the above-mentioned channel access mechanisms, such as supporting channel access types of type 1, type 2A, type 2B and type 2C.

[0101] Resource block set (RB set)

[0102] The SL-U system can configure a resource pool on the unlicensed spectrum through pre-configuration information or network configuration information for sidelink transmission. In some embodiments, the resource pool includes M1 resource block sets (i.e., RB sets). Among them, a resource block set includes M2 resource blocks. M1 and M2 are positive integers. In some embodiments, a resource block set can correspond to a channel in the unlicensed spectrum. Alternatively, a resource block set can correspond to the minimum frequency domain granularity for LBT. Alternatively, a resource block set can correspond to an LBT subband.

[0103] For example, the bandwidth corresponding to a channel in unlicensed spectrum is 20 MHz, that is, the bandwidth corresponding to a resource block set is also 20 MHz. Alternatively, the bandwidth of a channel in unlicensed spectrum is 20 MHz, corresponding to M3 RBs, where M3 RBs are all RBs included in a channel, or all RBs in a channel that can be used for data transmission. M3 is a positive integer. For example, if M3 = 100 (corresponding to 15 kHz subcarrier spacing), then a resource block set also corresponds to 100 RBs, that is, M2 = 100.

[0104] For another example, the results of LBT are needed to determine whether the unlicensed spectrum can be used. If the minimum frequency domain granularity for LBT is 20MHz, then one resource block set corresponds to the number of RBs included in 20MHz. Alternatively, if a resource block set includes M2 = 100 RBs (corresponding to a 15kHz subcarrier spacing), then the minimum frequency domain granularity for LBT is the number of RBs included in one resource block set, i.e., 100 RBs.

[0105] It should be noted that the resource block set can also be called a channel or LBT subband, which is not limited in the embodiments of the present application.

[0106] In an unlicensed spectrum sideline communication system, a resource pool may include an integer number of resource block sets.

[0107] In some implementations, the frequency domain starting position of the resource pool may be the same as the frequency domain starting position of the first resource block set in the M1 resource block sets, wherein the first resource block set is the resource block set with the lowest frequency domain position in the M1 resource block sets.

[0108] In some embodiments, the frequency domain end position of the resource pool is the same as the frequency domain end position of the second resource block set in the M1 resource block sets, wherein the second resource block set is the resource block set with the highest frequency domain position in the M1 resource block sets.

[0109] For example, the resource pool includes M1=3 resource block sets, and the corresponding resource block set indexes are resource block set 0, resource block set 1, and resource block set 2. Among them, the frequency domain position of resource block set 0 is the lowest, and the frequency domain position of resource block set 2 is the highest. Therefore, the frequency domain starting position of the resource pool is the same as the frequency domain starting position of resource block set 0, or the frequency domain starting position of the resource pool is determined based on the frequency domain starting position of resource block set 0; the frequency domain ending position of the resource pool is the same as the frequency domain ending position of resource block set 2, or the frequency domain ending position of the resource pool is determined based on the frequency domain ending position of resource block set 2.

[0110] In some implementations, a guard band (GB) is included between two adjacent resource block sets in the M1 resource block sets included in the resource pool.

[0111] In some embodiments, the frequency domain starting position and frequency domain size of the guard band are determined based on pre-configured information or network configuration information. The terminal obtains the pre-configured information or network configuration information, which is used to configure the guard band. In some embodiments, the guard band is used to separate resource block sets.

[0112] For example, this can be understood by referring to Figure 14. As shown in Figure 14, three guard bands are configured within the sidelink bandwidth part (BWP), corresponding to guard band 0, guard band 1, and guard band 2. These three guard bands separate four resource block sets. The frequency domain starting position and ending position of each resource block set can be determined based on the frequency domain starting position of the sidelink BWP (i.e., the starting point of the sidelink BWP shown in Figure 14), the frequency domain starting position of each guard band (i.e., the starting point of the guard band shown in Figure 14), and the frequency domain size of the guard band (i.e., the length of the guard band shown in Figure 14). As shown in Figure 14, a sidelink resource pool is configured within the sidelink BWP. This sidelink resource pool includes three resource block sets, namely, resource block set 0 through resource block set 2. Therefore, the frequency domain starting position of the resource pool (i.e., the starting point of the resource pool shown in Figure 14) corresponds to the frequency domain starting position of resource block set 0, and the frequency domain ending position of the resource pool (i.e., the end point of the resource pool shown in Figure 14) corresponds to the frequency domain ending position of resource block set 2.

[0113] In some implementations, a resource block set includes multiple comb teeth. For example, each resource block set in FIG14 may include multiple comb teeth.

[0114] In some embodiments, a PSSCH may be transmitted in one or more resource block sets. In yet other embodiments, a PSSCH may be transmitted in one or more resource block sets, and the PSSCH occupies one or more comb teeth in the one or more resource block sets. For example, in Figure 14, the resource pool includes three resource block sets, namely resource block set 0, resource block set 1, and resource block set 2. When the subcarrier spacing size is 15kHz, 100 RBs are included in a resource block set, corresponding to 10 comb teeth, namely comb teeth 0 to comb teeth 9. A PSSCH may be transmitted in a resource block set. Moreover, the PSSCH may occupy part or all of the comb tooth resources in a resource block set. For example, PSSCH1 may be transmitted in resource block set 0, and PSSCH1 occupies all comb tooth resources in resource block set 0, that is, PSSCH1 occupies resources corresponding to comb teeth 0 to comb teeth 9 in resource block set 0. For another example, PSSCH2 can be transmitted in resource block set 1, and PSSCH2 occupies two comb-tooth resources in resource block set 1, such as PSSCH2 occupies the resources corresponding to comb teeth 0 and comb teeth 1 in resource block set 1. PSSCH3 can be transmitted in resource block set 1 and resource block set 2, and PSSCH3 occupies three comb-tooth resources in these two resource block sets respectively, such as PSSCH3 occupies the resources corresponding to comb teeth 3, comb teeth 4, and comb teeth 5 in resource block set 1 and resource block set 2 respectively.

[0115] interlace structure

[0116] Communication in unlicensed frequency bands usually needs to meet corresponding regulatory requirements. For example, if a terminal device wants to communicate in an unlicensed frequency band, the frequency band range occupied by the terminal device needs to be greater than or equal to 80% of the system bandwidth (i.e., the regulatory requirement of occupied channel bandwidth (OCB)). Therefore, in order to allow as many users as possible to access the channel in the same amount of time, a comb-based resource configuration method is defined in some unlicensed spectrum communication systems (such as NR-U systems). For example, a comb tooth includes N RBs. N can be a positive integer. The RBs included in a comb tooth can also be called interlaced resource blocks (IRBs). The RBs included in a comb tooth are equally spaced in the frequency domain. If there are a total of M comb teeth in the frequency band, the RBs included in the mth comb tooth can be {m, M+m, 2M+m, 3M+m, ...}.

[0117] Figure 15 shows an example of a comb-tooth-based resource configuration. As shown in Figure 15 , the system bandwidth consists of 30 RBs and includes five comb teeth (i.e., M = 5). Each comb tooth includes six RBs (i.e., N = 6). The frequency domain spacing between two adjacent RBs in a comb tooth is the same, i.e., five RBs apart.

[0118] Comb structure in unlicensed spectrum sideline communication system

[0119] In the SL-U system, if comb-tooth-based resource allocation granularity is adopted, channels such as PSCCH, PSSCH, and PSFCH are all based on a comb-tooth structure. In this case, the frame structure of the communication system can be shown in Figures 16 and 17. The numbers in the boxes in Figures 16 and 17 represent comb-tooth indices. RBs with the same comb-tooth index belong to the same comb-tooth resource.

[0120] Figure 16 shows an example of a frame structure in which a time slot includes PSCCH and PSSCH, but not PSFCH. Figure 17 shows an example of a frame structure in which a time slot includes PSCCH, PSSCH, and PSFCH. The bandwidth shown in Figures 16 and 17 includes 20 RBs, configured with 5 comb resources, i.e., M = 5, with each comb resource including 4 RBs. In Figure 16, the system configuration shows that PSCCH occupies 1 comb resource and occupies 2 orthogonal frequency division multiplexing (OFDM) symbols in the time domain. PSSCH uses comb granularity. The first symbol in a time slot is an AGC symbol, and the data on the first symbol can be a repetition of the data on the second symbol. The last symbol in a time slot is a GP symbol. In Figures 16 and 17, PSSCH1 occupies comb #0 and comb #1, with its corresponding PSCCH1 occupying comb #0. PSSCH2 occupies comb #2, with its corresponding PSCCH2 also occupying comb #2. In FIG17 , PSFCH0 occupies comb tooth #0 and one RB in comb tooth #2 (RB #2 as shown in FIG17 ).

[0121] It should be noted that, for the sake of simplicity, FIG16 and FIG17 do not show the resources occupied by the second-order SCI and the resources occupied by the PSCCH demodulation reference symbol (DMRS) and the PSSCH DMRS.

[0122] PSFCH channel structure in SL-U system

[0123] In the SL-U system, the following channel structure can be used for the PSFCH channel: the first PSFCH transmission can occupy a common comb tooth (hereinafter referred to as the common comb tooth) and K3 dedicated RBs. The K3 dedicated RBs belong to the same comb tooth. The value of K3 can include, for example, {1, 2, 5}. It should be noted that the comb tooth to which the K3 dedicated RBs belong (hereinafter referred to as the dedicated comb tooth) can be a different comb tooth from the common comb tooth.

[0124] In the embodiment of the present application, the K3 dedicated RBs occupied by the first PSFCH are called a resource block group. It can be understood that when K3=1, a resource block group includes one RB, and at this time, the resource block group index can also be called an RB index.

[0125] It is understood that the common comb teeth occupied by PSFCH transmissions can meet the requirements of OCB regulations. Different PSFCH transmissions can correspond to different K3 dedicated RBs. Dedicated RBs can ensure sufficient PSFCH transmission resources while avoiding interference between different PSFCHs.

[0126] Continuing with Figure 17, a PSFCH occupies one common comb resource and one dedicated RB. Taking PSFCH0 as an example, as shown in Figure 17, PSFCH0 occupies common comb #0 and one dedicated RB in comb #2 (RB #2 in Figure 17). That is, for PSFCH0, K3 = 1. The index of RB #2 can be used as the resource block group index occupied by the first PSFCH.

[0127] PSFCH transmission opportunities

[0128] In the SL-U system, to overcome the problem of PSFCH transmission failure due to LBT failure, a mechanism is supported to configure N transmission opportunities for one PSFCH. N can be a positive integer. For example, N can satisfy N = 1, 2, 3, or 4. For example, for a PSSCH, the receiving terminal device determines the corresponding PSFCH transmission resources based on the PSSCH. For the first PSFCH transmission opportunity, the terminal device performs LBT before transmitting the PSFCH. If the LBT is successful, the terminal device transmits the PSFCH in this PSFCH transmission opportunity. If the LBT fails, the terminal device cannot transmit the PSFCH and needs to further determine whether the PSFCH can be transmitted based on the LBT results in the next PSFCH transmission opportunity.

[0129] If the PSSCH is in time slot n, and one PSFCH is configured with four transmission opportunities (i.e., N = 4), then the four PSFCH transmission opportunities correspond to time slots n+k1, n+k2, n+k3, and n+k4, respectively. k1, k2, k3, and k4 are positive integers and can be different values, meaning that the multiple transmission opportunities corresponding to the PSFCH are in different time slots. For example, if the PSFCH transmission resource is periodic, the four transmission opportunities corresponding to the PSFCH correspond to PSFCH transmission time slots in different periods.

[0130] Figure 18 illustrates the time slot positions corresponding to PSFCH transmission opportunities. As shown in Figure 18, for a PSSCH transmitted in time slot 1, the first PSFCH transmission opportunity is in time slot 4, and the second transmission opportunity is in time slot 8. For a PSSCH transmitted in time slot 5, the first PSFCH transmission opportunity is in time slot 8. Therefore, two PSFCH transmissions may be required for the PSFCH transmission opportunity corresponding to time slot 8.

[0131] The applicants of this application discovered that, when determining PSFCH transmission resources, the related art only considers how to ensure that one PSFCH occupies one RB, and fails to take into account the aforementioned requirements for unlicensed spectrum. For example, if the PSFCH uses comb-tooth granularity, the method for determining PSFCH resources proposed in the related art is not applicable. Therefore, the technical solution for determining PSFCH transmission resources in the related art is difficult to apply in unlicensed sideline communication systems.

[0132] FIG19 is a schematic structural diagram of a method for sideline transmission provided in an embodiment of the present application to solve the above-mentioned problem. The method shown in FIG19 can be executed by a first terminal device. The method shown in FIG19 can include step S1910.

[0133] Step S1910: The first terminal device determines the transmission resources of the first PSFCH.

[0134] The first terminal device may perform sideline communication with other terminal devices on the unlicensed spectrum. The first terminal device may be a terminal device that sends the first PSFCH, or a terminal device that receives the first PSFCH.

[0135] The first PSFCH can be used to carry sidelink feedback information corresponding to the sidelink data. For example, the first PSFCH can be associated with the first PSSCH. In other words, the sidelink feedback information corresponding to the first PSSCH can be carried by the first PSFCH.

[0136] The transmission resources of the first PSFCH may include one or more of the following: a common comb occupied by the first PSFCH and a dedicated RB occupied by the first PSFCH.

[0137] In some embodiments, the first terminal device determines the transmission resources of the first PSFCH, including determining a dedicated RB occupied by the first PSFCH.

[0138] In some embodiments, the first terminal device determines the transmission resource of the first PSFCH, including determining a common comb occupied by the first PSFCH.

[0139] In some embodiments, the first terminal device determines the transmission resources of the first PSFCH, including determining the dedicated RBs and common comb teeth occupied by the first PSFCH.

[0140] Based on this application, the first terminal device can determine the transmission resources of the PSFCH in the unlicensed spectrum based on the comb structure. Therefore, when determining the resources of the side feedback channel, this application takes into account the comb structure involved in the unlicensed spectrum, thereby taking into account both the requirements of the unlicensed spectrum and the transmission requirements of the side feedback information.

[0141] The following describes how to determine the transmission resources of the first PSFCH.

[0142] It should be noted that the transmission resources of the first PSFCH may include time domain resources, frequency domain resources, and code domain resources. The embodiments of this application mainly introduce a method for determining frequency domain resources or code domain resources; or, a method for determining frequency domain resources and code domain resources. This application does not limit the method for determining time domain resources.

[0143] A common comb may be a comb shared by multiple PSFCH transmissions. For example, when a first terminal device determines the transmission resources of a second PSFCH, if the transmission resources of the first PSFCH and the transmission resources of the second PSFCH are located in the same RB set, then the transmission resources of the first PSFCH and the transmission resources of the second PSFCH may include the same common comb.

[0144] In some embodiments, the common comb teeth may be determined based on one or more of the following ways: protocol predefined information; preconfigured information; configuration information of the network device; and indication information sent by the target terminal device.

[0145] It should be noted that the target terminal device can be a terminal device that sends the first PSFCH, a terminal device that receives the first PSFCH, a terminal device that sends the first PSSCH, or a terminal device that receives the first PSSCH. Therefore, it can be seen that the target terminal device can be the first terminal device. Alternatively, the target terminal device can be a terminal device that performs sideline communication with the first terminal device.

[0146] For example, the pre-configuration information or the configuration information of the network device includes the resource pool configuration information, and the resource pool configuration information includes indication information for indicating the common comb teeth.

[0147] The following describes a method for determining the dedicated RB of the first PSFCH or the transmission resources occupied by the first PSFCH by way of examples 1 to 3.

[0148] Example 1

[0149] In the first embodiment, for a PSFCH transmission opportunity, the dedicated RB occupied by the first PSFCH or the transmission resource occupied by the first PSFCH may be determined from the first candidate transmission resource set.

[0150] The first candidate transmission resource set may be a set of candidate PSFCH transmission resources. In some embodiments, the set of candidate PSFCH transmission resources includes all resources that can be used for PSFCH transmission. For example, the set of candidate PSFCH transmission resources includes both common comb resources for PSFCH transmission and dedicated comb or dedicated RB resources for PSFCH transmission. In some embodiments, the set of candidate PSFCH transmission resources does not include common comb resources. In some embodiments, the set of candidate PSFCH transmission resources includes dedicated comb or dedicated RB resources that can be used for PSFCH transmission. For example, the first candidate transmission resource set may include all dedicated RBs or dedicated comb resources that can be used to transmit the first PSFCH in a PSFCH transmission opportunity. Exemplarily, the first candidate transmission resource set may be a set of all resources that can be used to transmit PSFCH in the first time slot.

[0151] It should be noted that the total number of resources included in the first candidate transmission resource set can be determined based on one or more of the number of RB sets available for PSFCH transmission included in the first candidate transmission resource set, the number of comb teeth available for PSFCH transmission included in an RB set, the number of resource block groups available for PSFCH transmission included in a comb tooth, the number of transmission resources that can be code-division multiplexed, the number of RB sets corresponding to the transmission resources of the first PSSCH, and the number of subchannels or the number of comb teeth corresponding to the transmission resources of the first PSSCH. The present application provides the following methods to determine the index of the transmission resource in the first candidate transmission resource set.

[0152] Method 1: The transmission resources in the first candidate transmission resource set can be indexed first in the order of available RB set index from low to high, then in the order of comb index from low to high, then in the order of resource block group index from low to high, and finally in the order of code domain resource index from low to high.

[0153] Method 2: The transmission resources in the first candidate transmission resource set can be indexed first in the order of comb index from low to high, then in the order of resource block group index from low to high, then in the order of available RB set index from low to high, and finally in the order of code domain resource index from low to high.

[0154] Method three, the transmission resources in the first candidate transmission resource set can be indexed first in the order of comb index from low to high, then in the order of available RB set index from low to high, then in the order of resource block group index from low to high, and finally in the order of code domain resource index from low to high.

[0155] Method four: the transmission resources in the first candidate transmission resource set can be indexed first in the order of resource block group index from low to high, then in the order of comb index from low to high, then in the order of available RB set index from low to high, and finally in the order of code domain resource index from low to high.

[0156] Method five: The transmission resources in the first candidate transmission resource set can be indexed first in descending order of the available RB set index, then in descending order of the comb index, then in descending order of the resource block group index, and finally in descending order of the code domain resource index.

[0157] Method six: the transmission resources in the first candidate transmission resource set can be indexed first in the order of comb index from high to low, then in the order of resource block group index from high to low, then in the order of available RB set index from high to low, and finally in the order of code domain resource index from high to low.

[0158] Method seven: the transmission resources in the first candidate transmission resource set can be indexed first in the order of comb index from high to low, then in the order of available RB set index from high to low, then in the order of resource block group index from high to low, and finally in the order of code domain resource index from high to low.

[0159] Method eight: The transmission resources in the first candidate transmission resource set can be indexed first in descending order of resource block group index, then in descending order of comb index, then in descending order of available RB set index, and finally in descending order of code domain resource index.

[0160] The following describes the first candidate transmission resource set with reference to Figure 20. Figure 20 is a schematic diagram of the frequency domain resources for a PSFCH transmission opportunity. The subcarrier spacing of the frequency domain resources shown in Figure 20 is 30 kHz. The resource pool includes two RB sets, with a guard band configured between the two RB sets. The numbers within the boxes in Figure 20 represent comb resource indexes. Each RB set supports five comb resources. Comb 0 is configured as a common comb, and the remaining four combs are dedicated combs. K3 = 2, meaning that one PSFCH is mapped to a common comb and two dedicated RBs, which form a resource block group. As shown in Figure 20, the two adjacent RBs of comb 1 in RB set 0 constitute a resource block group; the two adjacent RBs of comb 1 in RB set 1 constitute a resource block group. The first candidate transmission resource set includes combs 1 to 4 in RB set 0, and combs 1 to 4 in RB set 1. Therefore, the frequency domain resources shown in Figure 20 can be indexed using any of Methods 1 to 8.

[0161] The available RB sets, comb teeth, resource block groups, and code domain resources are described in detail below.

[0162] As a possible implementation, the available RB set may be determined based on one or more of the following: the RB set corresponding to the transmission resource of the first PSSCH, the RB set included in the resource pool corresponding to the first PSSCH, and whether the transmission opportunity corresponding to the first PSFCH is the first PSFCH transmission opportunity among the N PSFCH transmission opportunities associated with the first PSSCH. For example, the available RB set for the first PSFCH transmission resource may be equal to the RB set corresponding to the transmission resource of the first PSSCH. For another example, the available RB set for the first PSFCH transmission resource may be equal to the first RB set among the RB sets corresponding to the transmission resource of the first PSSCH. For another example, the available RB set for the first PSFCH transmission resource may be equal to the RB set included in the resource pool where the transmission resource of the first PSSCH resides. For another example, if the transmission opportunity corresponding to the first PSFCH is the first PSFCH transmission opportunity among the N PSFCH transmission opportunities, the available RB set may include the RB set corresponding to the transmission resource of the first PSSCH. For another example, if the transmission opportunity corresponding to the first PSFCH is not the first PSFCH transmission opportunity among the N PSFCH transmission opportunities, the available RB set may include the RB set included in the resource pool.

[0163] Exemplarily, if the PSSCH resource pool includes 4 RB sets, and the transmission resources of the first PSSCH are located in the first and second RB sets. Optionally, the RB sets available for transmission of the first PSFCH may include only the first and second RB sets. Optionally, the RB sets available for transmission of the first PSFCH may include only the first RB set. Optionally, the RB sets available for transmission of the first PSFCH may include all 4 RB sets included in the resource pool. Optionally, if the first PSFCH corresponds to the first transmission opportunity among N PSFCH transmission opportunities, the RB sets available for transmission of the first PSFCH may include only the first and second RB sets; if the first PSFCH corresponds to a transmission opportunity other than the first transmission opportunity among N PSFCH transmission opportunities, the RB sets available for transmission of the first PSFCH may include all 4 RB sets included in the resource pool.

[0164] It can be understood that when the available RB set is determined based on the RB set corresponding to the transmission resources of the first PSSCH, the transmission resources of the PSFCH and the transmission resources of the PSSCH associated with it are located in the same RB set, or the RB set where the transmission resources of the PSFCH are located is included in the RB set corresponding to the transmission resources of the PSSCH associated with it, or the RB set where the transmission resources of the PSFCH are located is the first RB set where the transmission resources of the PSSCH associated with it are located, or the transmission resources of the PSFCH are determined in the RB set corresponding to the transmission resources of the PSSCH.

[0165] It can be understood that when the available RB set is determined based on the RB set included in the resource pool corresponding to the first PSSCH, the transmission resources of the first PSFCH can be located in any RB set corresponding to the candidate PSFCH transmission resources configured in the resource pool.

[0166] It should be noted that the frequency domain range of a comb tooth in the first candidate transmission resource set corresponds to the frequency domain range of a comb tooth in an RB set, or the frequency domain range of a comb tooth in the first candidate transmission resource set is located in an RB set. For example, in Figure 20, a comb tooth in the first candidate transmission resource set includes comb teeth 1, comb teeth 2, comb teeth 3 and comb teeth 4 in RB set 0, and comb teeth 1, comb teeth 2, comb teeth 3 and comb teeth 4 in RB set 1. Optionally, the comb teeth may not include public comb teeth used for PSFCH transmission. In other words, the first candidate transmission resource set can be determined based on the non-public comb teeth or dedicated comb teeth included in the available RB set. Among them, the dedicated comb teeth refer to the comb teeth where the dedicated RBs that can be used to map PSFCH transmission resources are located.

[0167] For example, a resource pool may include 4 RB sets. The subcarrier spacing of the resource pool is 30 kHz. Each RB set includes 5 comb teeth (corresponding to comb teeth 0 to comb teeth 4). If the first comb tooth (i.e., comb tooth 0) in each RB set is configured as a public comb tooth, the RBs included in the remaining 4 comb teeth are dedicated RBs that can be used for the first PSFCH transmission. These 4 comb teeth are also called dedicated comb teeth or non-public comb teeth. In other words, each RB set includes 4 comb teeth. Therefore, when determining the first candidate transmission resource set, it is determined based on the dedicated comb teeth (corresponding to comb teeth 1 to comb teeth 4) included in each RB set.

[0168] In some embodiments, comb teeth available for PSFCH transmission can be configured separately for different RB sets in a resource pool. That is, the comb teeth within each RB set can be configured separately. In this case, the number of comb teeth and / or comb tooth resources within different RB sets in the resource pool can be different.

[0169] For example, the resource pool includes two RB sets, and the comb tooth resources that can be used for PSFCH transmission configured in the first RB set include comb tooth 0, comb tooth 1 and comb tooth 2, wherein comb tooth 0 is the public comb tooth used for PSFCH transmission in the RB set, and the RBs included in comb tooth 1 and comb tooth 2 are dedicated RBs that can be used to transmit PSFCH. Comb teeth 1 and comb teeth 2 are also called non-public comb teeth or dedicated comb teeth; the comb tooth resources that can be used for PSFCH transmission configured in the second RB set include comb teeth 3 and comb teeth 4, wherein comb tooth 3 is the public comb tooth used for PSFCH transmission in the RB set, and the RBs included in comb tooth 4 are dedicated RBs that can be used to transmit PSFCH. Comb teeth 4 are also called non-public comb teeth or dedicated comb teeth.

[0170] For another example, the resource pool includes two RB sets, and the comb tooth resources that can be used for PSFCH transmission configured in the first RB set include comb tooth 0, comb tooth 1 and comb tooth 2, among which comb tooth 0 is the public comb tooth used for PSFCH transmission in the RB set, and the RBs included in comb tooth 1 and comb tooth 2 are dedicated RBs that can be used to transmit PSFCH, and comb tooth 1 and comb tooth 2 are also called non-public comb teeth or dedicated comb teeth; the comb tooth resources that can be used for PSFCH transmission configured in the second RB set include comb tooth 0 and comb tooth 4, among which comb tooth 0 is the public comb tooth used for PSFCH transmission in the RB set, and the RBs included in comb tooth 4 are dedicated RBs that can be used to transmit PSFCH, and comb tooth 4 is also called non-public comb teeth or dedicated comb teeth.

[0171] It should be noted that for different RB sets in the resource pool, the comb teeth in each RB set may be configured uniformly. In this case, the number of comb teeth in different RB sets may be the same.

[0172] K3 dedicated RBs used to carry one PSFCH constitute a resource block group, and one resource block group can be used to carry one PSFCH. One resource block group can correspond to K3 RBs in one comb tooth. K3 can be equal to the number of dedicated RBs, and K3 can be a positive integer greater than or equal to 1. Since one PSFCH occupies K3 dedicated RBs, and the K3 RBs belong to the same comb tooth, the K3 RBs can be regarded as a resource block group. If a comb tooth includes A RBs, the resource block group included in the comb tooth that can be used for PSFCH transmission can be determined in the following way. A is a positive integer greater than or equal to 1, for example, A is equal to 10 or 11.

[0173] Method 1: The number of resource blocks contained in a comb tooth can be equal to in, It represents the number of combinations formed by selecting K3 elements from A elements.

[0174] It is understandable that, in Mode 1, K3 RBs may be selected from the A RBs as a resource block group. The RBs included in any two resource block groups may be partially identical.

[0175] The following is an example of A=10, K3=2. Based on method 1, the number of resource block groups included in the comb teeth is indivual.

[0176] For a comb tooth including A RBs, the corresponding relationship between the index of the resource block group and the RB index can be determined by the following method: Indicates that a resource block group includes K3 RBs, n i (i=0, 1, ..., K3-1) represents the RB index corresponding to the i+1th RB included in the resource block group; the index of the resource block group is based on The index is from low to high, and then according to The indexes of n1 are ordered from low to high, and so on, and finally the indexes of n2 are ordered from low to high.

[0177] Exemplarily, the correspondence between the resource block group index of the comb tooth and its corresponding RB index may be as shown in Table 2. The RB index represents the index of the RB in the 10 RBs included in the comb tooth.

[0178] Table 2

[0179] Mode 2: The number of resource block groups included in one comb tooth may be equal to floor(A / K3). Wherein, floor() indicates rounding down. Alternatively, the number of resource block groups included in one comb tooth may be equal to the integer part of the result obtained by dividing A by K3. In some implementations, the number of resource block groups included in one comb tooth may be equal to ceil(A / K3), or the number of resource block groups included in one comb tooth may be equal to round(A / K3); where, ceil() indicates rounding up, and round() indicates rounding up.

[0180] It is understandable that in mode 2, RBs that have been allocated to one resource block group cannot be allocated to another resource block group. In other words, any two resource block groups do not include the same RBs, or any two resource block groups include different RBs.

[0181] The following example uses A = 10 and K3 = 2 as an example. Based on method 2, the number of resource block groups included in the comb tooth is floor(10 / 2) = 5. For example, the correspondence between the resource block group index and its corresponding RB index is shown in Table 3. The RB index represents the index of the RB among the 10 RBs included in the comb tooth.

[0182] Table 3

[0183] Mode 3: If K3=1, the number of resource block groups included in one comb tooth may be equal to A. That is, each of the A RBs included in the comb tooth may correspond to one resource block group.

[0184] The following example uses A = 10 and K3 = 1 as an example. Based on mode 3, the number of resource block groups included in the comb tooth is 10. The correspondence between the resource block group index and its corresponding RB index is shown in Table 4. The RB index represents the index of the RB in the 10 RBs included in the comb tooth.

[0185] Table 4

[0186] It should be noted that the number of RBs included in each of the multiple comb teeth included in an RB set can be the same or different. For example, if an RB set includes a first comb tooth and a second comb tooth, the number of RBs included in the first comb tooth and the second comb tooth can be the same or different. If the number of RBs included in the first comb tooth and the second comb tooth is different, the resource block groups included in the first comb tooth and the second comb tooth can be calculated separately.

[0187] For example, an RB set includes two dedicated comb teeth that can be used to transmit the PSFCH, such as comb tooth 1 (i.e., the first comb tooth) and comb tooth 2 (i.e., the second comb tooth). Comb tooth 1 includes 10 RBs, and comb tooth 2 includes 11 RBs. In this case, the first terminal device can calculate the resource block groups included in each comb tooth. The following examples illustrate how to calculate the resource block groups included in the comb teeth for each method 1 to method 3, in combination with this embodiment.

[0188] For method 1

[0189] If K3=2, the number of resource block groups included in comb tooth 1 can be The index range of these 45 resource block groups in the comb tooth can be: [0,44]. The number of resource block groups included in comb tooth 2 can be The index range of these 55 resource block groups in the comb teeth can be: [0,54].

[0190] If K3=1, the number of resource block groups included in comb tooth 1 is The index range of these 10 resource block groups in the comb tooth can be: [0,9]. The number of resource block groups included in comb tooth 2 is The index range of these 11 resource block groups in the comb teeth can be: [0,10].

[0191] For method 2

[0192] If K3 = 2, the number of resource block groups included in comb tooth 1 can be floor(10 / 2) = 5. The index range of these five resource block groups in the comb tooth can be: [0, 4]. The number of resource block groups included in comb tooth 2 can be floor(11 / 2) = 5. The index range of these five resource block groups in the comb tooth can be: [0, 4].

[0193] If K3 = 1, the number of resource block groups included in comb tooth 1 can be floor(10 / 1) = 10. The index range of these 10 resource block groups in the comb tooth is: [0, 9]. The number of resource block groups included in comb tooth 2 is floor(11 / 1) = 11. The index range of these 11 resource block groups in the comb tooth is: [0, 10].

[0194] For method 3

[0195] If K3=1, the number of resource block groups included in comb tooth 1 can be 10. The index range of these 10 resource block groups in the comb tooth can be: [0, 9]. The number of resource block groups included in comb tooth 2 is 11, and the index range of these resource block groups in the comb tooth can be: [0, 10].

[0196] The following describes code domain resources. Code domain resources may be resources that can be code-division multiplexed within a resource block group. The number of code domain resources may be determined based on one or more of the following: the number of cyclic shift pairs that can be code-division multiplexed within an RB and the number of resources that can be code-division multiplexed between RBs within a resource block group (i.e., K3 RBs).

[0197] In some embodiments, the number of code domain resources is equal to the number of cyclic shift pairs that can be code-division multiplexed within an RB; in some embodiments, the number of code domain resources is equal to the number of resources that can be code-division multiplexed between RBs included in a resource block group (i.e., K3 RBs); in some embodiments, the number of code domain resources is equal to the product of the number of cyclic shift pairs that can be code-division multiplexed within an RB and the number of resources that can be code-division multiplexed between RBs included in a resource block group (i.e., K3 RBs).

[0198] It should be noted that the number of cyclic shift pairs that can be code-division multiplexed within an RB can be determined based on a resource pool configuration parameter. This configuration parameter may be, for example, sl-NumMuxCS-Pair. As described above, the PSFCH can be used to carry HARQ information, including ACK or NACK. ACK and NACK information are carried via sequences, and the sequences corresponding to each ACK and NACK can each correspond to a cyclic shift value. That is, the HARQ information carried by the PSFCH corresponds to a cyclic shift pair. Multiple cyclic shift pairs can be supported for multiplexed transmission within an RB.

[0199] Exemplarily, the number of code domain resources can be determined based on the number of cyclic shift pairs that can be code-division multiplexed within an RB and the number of resources that can be code-division multiplexed between RBs included in a resource block group. For example, the number of cyclic shift pairs that can be code-division multiplexed within an RB can be represented by C1, and the number of resources that can be code-division multiplexed between RBs included in a resource block group can be represented by C2. The total number of resources that can be code-division multiplexed within the K3 RBs can be determined based on C1 and C2. For example, this number is equal to C1×C2.

[0200] In some embodiments, the dedicated RB or transmission resource occupied by the first PSFCH may be determined from a first set of candidate transmission resources based on a first parameter.

[0201] The first parameter may include one or more of the following parameters: a second parameter, a third parameter, a fourth parameter, a fifth parameter, a sixth parameter, a seventh parameter, an eighth parameter, a ninth parameter, and a tenth parameter, which are described below.

[0202] The second parameter may be determined based on the index corresponding to the first subchannel of the transmission resource of the first PSSCH, the index corresponding to the first comb tooth, or the index corresponding to the first RB. For example, the second parameter may include the index information corresponding to the first subchannel of the transmission resource of the first PSSCH. Alternatively, the second parameter may include the index information corresponding to the first comb tooth of the transmission resource of the first PSSCH. The second parameter may be recorded as M F_index_1 .

[0203] The third parameter may be determined based on the number of subchannels, comb teeth, or RBs included in the transmission resource of the first PSSCH. For example, the third parameter may include the number of subchannels included in the transmission resource of the first PSSCH. Alternatively, the third parameter may include the number of comb teeth included in the transmission resource of the first PSSCH. The third parameter may be denoted as M num_1 . Exemplarily, the number of subchannels included in the transmission resources of the first PSSCH is equal to the sum of the subchannels included in each RB set corresponding to the transmission resources of the first PSSCH; the number of comb teeth included in the transmission resources of the first PSSCH is equal to the sum of the comb teeth included in each RB set corresponding to the transmission resources of the first PSSCH.

[0204] The fourth parameter can be determined based on the time slot index corresponding to the transmission resource of the first PSSCH. For example, the fourth parameter may include the time slot index corresponding to the transmission resource of the first PSSCH. Exemplarily, the value range of the fourth parameter can be [0, P-1]. Among them, P can be determined based on the period parameter of the first PSFCH, or P can be determined based on the period parameter of the first PSFCH and the total number of transmission opportunities N corresponding to the first PSFCH. For example, P can satisfy P=P1 or P=N×P1, where P1 represents the PSFCH period. The fourth parameter can be recorded as M T_index_1 .

[0205] The fifth parameter can be determined based on the index of the RB set corresponding to the transmission resource of the first PSSCH. The index information of the RB set corresponding to the transmission resource of the first PSSCH may include: the index of the first RB set corresponding to the first PSSCH transmission resource, or the indexes corresponding to all RB sets corresponding to the first PSSCH transmission resource. For example, the fifth parameter may include the index of the first RB set corresponding to the first PSSCH transmission resource, or the fifth parameter may include the indexes of all RB sets corresponding to the first PSSCH transmission resource. The fifth parameter can be recorded as M F_index_2 .

[0206] The sixth parameter may be determined based on the number of RB sets corresponding to the transmission resources of the first PSSCH. For example, the sixth parameter may include the number of RB sets corresponding to the transmission resources of the first PSSCH.

[0207] The seventh parameter may be determined based on the index n of the transmission opportunity corresponding to the first PSFCH. For example, the seventh parameter may include the transmission opportunity corresponding to the first PSFCH. The value range of n may be [0, N-1]. Where N is the total number of transmission opportunities corresponding to the first PSFCH. The seventh parameter may be denoted as M T_index_2 .

[0208] It can be understood that based on the seventh parameter, the first terminal device can determine the dedicated RB occupied by the first PSFCH or the transmission resource occupied by the first PSFCH in the first candidate resource set according to the index of the transmission opportunity corresponding to the first PSFCH.

[0209] The eighth parameter may be determined based on the total number N of transmission opportunities corresponding to the first PSFCH. For example, the eighth parameter may include the total number N of transmission opportunities corresponding to the first PSFCH. Exemplarily, the first PSFCH associated with the first PSSCH corresponds to N transmission opportunities, and the sidelink feedback information corresponding to the first PSSCH is carried by the first PSFCH. If the first PSFCH is not successfully transmitted in the first transmission opportunity, such as due to LBT failure or the first PSFCH is discarded due to a conflict between sidelink and uplink transmissions, an attempt is made to transmit the first PSFCH in the second transmission opportunity, and so on.

[0210] The ninth parameter may be determined based on the first identification information. The first identification information may include the second identification information and / or the third identification information. The second identification information is determined based on the source identification included in the first SCI. The first SCI may be used to schedule the first PSSCH. The first SCI may be, for example, SCI 2-A / 2-B / 2-C. The second identification information may be recorded as P ID The third identification information may be 0. Alternatively, the third identification information may be determined based on a member ID of the terminal device in the communication group, such as a terminal device that receives the first PSSCH. The third identification information may be recorded as M ID .

[0211] The tenth parameter may be determined based on the total number of resources included in the first candidate transmission resource set. For example, the tenth parameter may include the total number of resources included in the first candidate transmission resource set. The tenth parameter may be denoted as M total-1 .

[0212] In some embodiments, the first parameter includes: the index corresponding to the first subchannel of the first PSSCH transmission resource, the time slot index corresponding to the first PSSCH transmission resource, the index of the first RB set corresponding to the first PSSCH transmission resource, the index of the transmission opportunity corresponding to the first PSFCH, the total number of transmission opportunities corresponding to the first PSFCH, the total number of resources included in the first candidate transmission resource set, and the first identification information.

[0213] In some embodiments, the first parameter includes: the index corresponding to the first subchannel of the first PSSCH transmission resource, the time slot index corresponding to the first PSSCH transmission resource, the index of the first RB set corresponding to the first PSSCH transmission resource, the number of RB sets corresponding to the first PSSCH transmission resource, the index of the transmission opportunity corresponding to the first PSFCH, the total number of transmission opportunities corresponding to the first PSFCH, the total number of resources included in the first candidate transmission resource set, and the first identification information.

[0214] In some embodiments, the first parameter includes: the index corresponding to the first subchannel of the first PSSCH transmission resource, the number of subchannels included in the transmission resource of the first PSSCH, the time slot index corresponding to the first PSSCH transmission resource, the index of the first RB set corresponding to the first PSSCH transmission resource, the index of the transmission opportunity corresponding to the first PSFCH, the total number of transmission opportunities corresponding to the first PSFCH, the total number of resources included in the first candidate transmission resource set, and the first identification information.

[0215] In some embodiments, the first parameter includes: the index corresponding to the first subchannel of the first PSSCH transmission resource, the number of subchannels included in the transmission resource of the first PSSCH, the time slot index corresponding to the first PSSCH transmission resource, the index of the first RB set corresponding to the first PSSCH transmission resource, the number of RB sets corresponding to the transmission resource of the first PSSCH, the index of the transmission opportunity corresponding to the first PSFCH, the total number of transmission opportunities corresponding to the first PSFCH, the total number of resources included in the first candidate transmission resource set, and the first identification information.

[0216] In some embodiments, the first parameter includes: the index corresponding to the first comb tooth of the first PSSCH transmission resource, the time slot index corresponding to the first PSSCH transmission resource, the index of the first RB set corresponding to the first PSSCH transmission resource, the index of the transmission opportunity corresponding to the first PSFCH, the total number of transmission opportunities corresponding to the first PSFCH, the total number of resources included in the first candidate transmission resource set, and the first identification information.

[0217] In some embodiments, the first parameter includes: the index corresponding to the first comb tooth of the first PSSCH transmission resource, the time slot index corresponding to the first PSSCH transmission resource, the index of the first RB set corresponding to the first PSSCH transmission resource, the number of RB sets corresponding to the first PSSCH transmission resource, the index of the transmission opportunity corresponding to the first PSFCH, the total number of transmission opportunities corresponding to the first PSFCH, the total number of resources included in the first candidate transmission resource set, and the first identification information.

[0218] In some embodiments, the first parameter includes: an index corresponding to the first subchannel of the first PSSCH transmission resource, a time slot index corresponding to the first PSSCH transmission resource, an index of the first RB set corresponding to the first PSSCH transmission resource, an index of the transmission opportunity corresponding to the first PSFCH, a total number of transmission opportunities corresponding to the first PSFCH, and first identification information.

[0219] In some embodiments, the first parameter includes: an index corresponding to the first subchannel of the first PSSCH transmission resource, a time slot index corresponding to the first PSSCH transmission resource, an index of the first RB set corresponding to the first PSSCH transmission resource, the number of RB sets corresponding to the first PSSCH transmission resource, an index of the transmission opportunity corresponding to the first PSFCH, the total number of transmission opportunities corresponding to the first PSFCH, and first identification information.

[0220] In some embodiments, the first parameter includes: the index corresponding to the first subchannel of the first PSSCH transmission resource, the number of subchannels included in the transmission resource of the first PSSCH, the time slot index corresponding to the first PSSCH transmission resource, the index of the first RB set corresponding to the first PSSCH transmission resource, the index of the transmission opportunity corresponding to the first PSFCH, the total number of transmission opportunities corresponding to the first PSFCH, and first identification information.

[0221] In some embodiments, the first parameter includes: the index corresponding to the first subchannel of the first PSSCH transmission resource, the number of subchannels included in the transmission resource of the first PSSCH, the time slot index corresponding to the first PSSCH transmission resource, the index of the first RB set corresponding to the first PSSCH transmission resource, the number of RB sets corresponding to the transmission resource of the first PSSCH, the index of the transmission opportunity corresponding to the first PSFCH, the total number of transmission opportunities corresponding to the first PSFCH, and first identification information.

[0222] In some embodiments, the first parameter includes: the index corresponding to the first comb tooth of the first PSSCH transmission resource, the time slot index corresponding to the first PSSCH transmission resource, the index of the first RB set corresponding to the first PSSCH transmission resource, the index of the transmission opportunity corresponding to the first PSFCH, the total number of transmission opportunities corresponding to the first PSFCH, and first identification information.

[0223] In some embodiments, the first parameter includes: the index corresponding to the first comb tooth of the first PSSCH transmission resource, the time slot index corresponding to the first PSSCH transmission resource, the index of the first RB set corresponding to the first PSSCH transmission resource, the number of RB sets corresponding to the first PSSCH transmission resource, the index of the transmission opportunity corresponding to the first PSFCH, the total number of transmission opportunities corresponding to the first PSFCH, and first identification information.

[0224] It can be seen from Example 1 that in Example 1, the first terminal device can first index the transmission resources included in the first candidate transmission resource set, and further through the first parameter, the first terminal device can determine the resource index corresponding to the first PSFCH transmission resource in the first candidate transmission resource, thereby determining the dedicated RB occupied by the first PSFCH or the transmission resource occupied by the first PSFCH.

[0225] In Embodiment 2 and Embodiment 3, the PSFCH transmission resource set (e.g., the first candidate transmission resource in Embodiment 1) may be divided into multiple candidate transmission resource subsets. The first terminal device may determine a specific candidate transmission resource subset from the multiple candidate transmission resource subsets, and further determine the transmission resource or dedicated RB of the first PSFCH in the specific candidate transmission resource subset.

[0226] Based on this, part of the description of the first candidate transmission resource set in the first embodiment is also applicable to the subset of the first candidate transmission resource set involved in the second and third embodiments.

[0227] One of the differences between the second embodiment and the third embodiment is the different ways of dividing the candidate transmission resource subsets.

[0228] Example 2

[0229] In the second embodiment, the candidate transmission resource subset may be referred to as a second candidate transmission resource set.

[0230] The dedicated RB occupied by the first PSFCH or the transmission resource occupied by the first PSFCH is determined from the second candidate transmission resource set.

[0231] The second candidate transmission resource set may be determined based on the information of the PSFCH transmission opportunity. In other words, the PSFCH transmission resource set may be divided into multiple candidate resource sets, and one of the candidate transmission resource sets is determined as the second candidate transmission resource set based on the information of the PSFCH transmission opportunity.

[0232] As a possible implementation method, the dedicated RB or transmission resource occupied by the first PSFCH is determined from the second candidate transmission resource set. The second candidate transmission resource set can be determined based on the PSFCH transmission opportunity index. In other words, the first terminal device can first determine a second candidate transmission resource set based on the PSFCH transmission opportunity index corresponding to the first PSFCH, and then determine the dedicated RB or transmission resource occupied by the first PSFCH in the second candidate transmission resource set.

[0233] Exemplarily, the PSFCH transmission resource set can be divided into N second candidate transmission resource sets according to the total number of PSFCH transmission opportunities N. The first terminal device can determine, according to the first PSFCH transmission opportunity index n, that one of the N second candidate transmission resource sets is the second candidate transmission resource set corresponding to the first PSFCH.

[0234] As described in Example 1, a PSFCH transmission resource set can be determined based on available RB set information, comb tooth information included in the RB set, resource block group information included in a comb tooth, and code domain resource information. That is, a PSFCH transmission resource set can be represented at one or more granularities of RB set, comb tooth, resource block group, and code domain resource. Therefore, this application proposes various embodiments for dividing a PSFCH transmission resource set into multiple candidate transmission resource subsets based on different granularities.

[0235] It should be noted that the following description uses the second candidate transmission resource set as an example to illustrate the method for dividing the PSFCH transmission resource set into multiple candidate transmission resource subsets. It should be understood that the division method described below is not only applicable to the second candidate transmission resource set, but also to other embodiments that require dividing the PSFCH transmission resource set into multiple candidate transmission resource subsets (such as Embodiment 3).

[0236] In some embodiments, the transmission resources in the second candidate transmission resource set may be determined based on the number of transmission resources included in the second candidate transmission resource set. Therefore, for ease of understanding, this application first explains which parameter or parameters the number of transmission resources included in the second candidate transmission resource set may be determined based on.

[0237] In some embodiments, the number of transmission resources included in the second candidate transmission resource set may be determined based on one or more of the following: a first number, a second number, a third number, and a fourth number.

[0238] The first number may be determined based on the number of first RB sets available for PSFCH transmission. The first number may be represented by A. A may be equal to the number of first RB sets available for PSFCH transmission.

[0239] The second number can be determined based on the number of comb teeth that can be used for PSFCH transmission included in one RB set in the first RB set. a Indicates that B a Indicates the number of comb teeth available for PSFCH transmission in RB set a. The number of comb teeth available for PSFCH transmission in an RB set in the first RB set may include the number of common comb teeth or may not include the number of common comb teeth. The following takes the case where the number of comb teeth available for PSFCH transmission in an RB set in the first RB set does not include the number of common comb teeth as an example for explanation. a For example, it may be equal to the number of comb teeth included in RB set a in the first RB set and available for PSFCH transmission.

[0240] The third number can be determined based on the number of resource block groups that can be used for PSFCH transmission contained in one comb tooth in one RB set. a,b Indicates. C a,b Indicates the number of resource block groups that can be used for PSFCH transmission contained in comb b in RB set a, for example, C a,b It can be equal to the number of resource block groups available for PSFCH transmission contained in the comb b in the RB set a.

[0241] The fourth number may be determined based on the number N of PSFCH transmission opportunities. It is understood that N may be the total number of transmission opportunities of the first PSFCH. For example, the fourth number may be equal to N.

[0242] The following describes the technical solutions for dividing the PSFCH transmission resource set into multiple (eg, N) second candidate transmission resource sets using RB sets, comb teeth, and resource block groups as frequency domain granularities.

[0243] Determine the second candidate transmission resource set based on the RB set granularity

[0244] The PSFCH transmission resource set may be divided into multiple second candidate transmission resource sets based on an RB set granularity. For example, one or more RB sets that may be used to transmit the first PSFCH are determined based on a PSFCH transmission opportunity index. The one or more RB sets may constitute the second candidate transmission resource set.

[0245] The number of transmission resources included in the second candidate transmission resource set can be determined based on the first number and the fourth number. Taking the first number as A and the fourth number as N as an example, the number of RB sets L0 included in the second candidate transmission resource set can satisfy the following conditions: L0 = A / N, L0 = floor(A / N), L0 = ceil(A / N), or L0 = round(A / N). Where floor() indicates rounding down; ceil() indicates rounding up; and round() indicates rounding up.

[0246] After determining the number L0 of RB sets included in the second candidate transmission resource set, the index of the RB set corresponding to each second candidate transmission resource set may be determined according to L0.

[0247] For example, assuming that A is an integer multiple of N, the number of RB sets included in a second candidate transmission resource set can be L0 = A / N; then the first second candidate transmission resource set includes the RB set corresponding to the index [0, L0-1], the second second candidate transmission resource set includes the RB set corresponding to the index [L0, 2L0-1], and so on.

[0248] The present application also provides an indexing method for resources in a second candidate transmission resource set determined with an RB set as the granularity. The resource indexing method may include, for example:

[0249] 1) The transmission resources in the second candidate transmission resource set are first indexed in ascending order of RB set index, then in ascending order of comb index, then in ascending order of resource block group index, and finally in ascending order of code domain resource index; or,

[0250] 2) The transmission resources in the second candidate transmission resource set are first indexed in ascending order of comb index, then in ascending order of resource block group index, then in ascending order of RB set index, and finally in ascending order of code domain resource index; or,

[0251] 3) The transmission resources in the second candidate transmission resource set are first indexed in ascending order of comb index, then in ascending order of RB set index, then in ascending order of resource block group index, and finally in ascending order of code domain resource index; or,

[0252] 4) The transmission resources in the second candidate transmission resource set are first indexed in ascending order of resource block group index, then in ascending order of comb index, then in ascending order of RB set index, and finally in ascending order of code domain resource index; or

[0253] 5) The transmission resources in the second candidate transmission resource set are first indexed in descending order of RB set index, then in descending order of comb index, then in descending order of resource block group index, and finally in descending order of code domain resource index; or,

[0254] 6) The transmission resources in the second candidate transmission resource set are first indexed in descending order of comb index, then in descending order of resource block group index, then in descending order of RB set index, and finally in descending order of code domain resource index; or,

[0255] 7) The transmission resources in the second candidate transmission resource set are first indexed in descending order of comb index, then in descending order of RB set index, then in descending order of resource block group index, and finally in descending order of code domain resource index; or,

[0256] 8) The transmission resources in the second candidate transmission resource set are first indexed in descending order of resource block group index, then in descending order of comb index, then in descending order of RB set index, and finally in descending order of code domain resource index.

[0257] Determine the second candidate transmission resource set based on the comb tooth granularity

[0258] The PSFCH transmission resource set may be divided into multiple second candidate transmission resource sets with comb teeth as granularity. Exemplarily, one or more comb teeth that may be used to transmit the first PSFCH are determined based on a PSFCH transmission opportunity index. The one or more comb teeth may constitute the second candidate transmission resource set.

[0259] The number of transmission resources included in the second candidate transmission resource set can be determined based on the first number, the second number, and the fourth number. For example, the total number of comb teeth included in the A RB set is Where a is an integer, and the value range of a is [0, A-1]. The number of comb teeth L1 included in the second candidate transmission resource set satisfies: or For example, if each RB set includes the same number of comb teeth that can be used for PSFCH transmission, such as each RB set includes B comb teeth, then the total number of comb teeth included in A RB sets may be A×B. The number L1 of comb teeth included in the second candidate transmission resource set satisfies: or Among them, A, B a The meanings of and N are as described above and will not be repeated here.

[0260] For all comb teeth in A RB sets, the comb tooth indexing method may include: first indexing according to the RB set index from low to high, and then indexing according to the comb tooth index from low to high; or, first indexing according to the RB set index from high to low, and then indexing according to the comb tooth index from high to low.

[0261] Based on A and B a The number of comb teeth and the corresponding comb tooth information (such as the indexing method described above) included in a second candidate transmission resource set can be determined by N, and the comb tooth information included in each second candidate transmission resource set can be determined. For example, the number of comb teeth included in a second candidate transmission resource set is:

[0262] After determining the number L1 of comb teeth included in the second candidate transmission resource set, the index of the comb teeth corresponding to each second candidate transmission resource set can be determined based on L1. For example, the first second candidate transmission resource set includes comb teeth with indexes of [0, L1-1], the second second candidate transmission resource set includes comb teeth with indexes of [L1, 2L1-1], and so on.

[0263] The present application also provides a method for indexing resources in the second candidate transmission resource set determined with comb teeth as the granularity. The resource indexing method may include, for example:

[0264] 1) The transmission resources in the second candidate transmission resource set are first indexed in ascending order according to the comb index, then in ascending order according to the resource block group index, and then in ascending order according to the code domain resource index; or,

[0265] 2) The transmission resources in the second candidate transmission resource set are first indexed in ascending order of resource block group index, then in ascending order of comb index, and then in ascending order of code domain resource index; or,

[0266] 3) The transmission resources in the second candidate transmission resource set are first indexed in descending order of comb index, then in descending order of resource block group index, and then in descending order of code domain resource index; or,

[0267] 4) The transmission resources in the second candidate transmission resource set are first indexed in descending order of resource block group index, then in descending order of comb index, and finally in descending order of code domain resource index.

[0268] Determine the second candidate transmission resource set based on the resource block group granularity

[0269] The PSFCH transmission resource set may be divided into multiple second candidate transmission resource sets at a granularity of resource block groups. Exemplarily, one or more resource block groups that may be used to transmit the first PSFCH are determined based on a PSFCH transmission opportunity index. The one or more resource block groups may constitute the second candidate transmission resource set.

[0270] In some embodiments, the number of transmission resources included in the second candidate transmission resource set can be determined based on the first number, the second number, the third number, and the fourth number. For example, the total number of resource block groups included in the A RB set is Where a and b are both integers, and the value range of a is [0, A-1], and the value range of b is [0, B a -1]. The number of resource block groups L2 included in the second candidate transmission resource set satisfies: or For example, if each RB set includes the same number of comb teeth that can be used for PSFCH transmission, such as each RB set includes B comb teeth, and each comb tooth includes the same number of resource block groups that can be used for PSFCH transmission, such as each comb tooth includes C resource block groups, then the total number of resource blocks included in A RB sets can be A×B×C. The number of resource blocks L2 included in the second candidate transmission resource set satisfies: or Among them, A, B a 、C a,b The meanings of and N are as described above and will not be repeated here.

[0271] For all resource block groups in A RB sets, the resource block group indexing method may include: first indexing in order from low to high according to the RB set index, then indexing in order from low to high according to the comb index, and then indexing in order from low to high according to the resource block group index; or, first indexing in order from low to high according to the comb index, then indexing in order from low to high according to the RB set index, and then indexing in order from low to high according to the resource block group index; or, first indexing in order from high to low according to the RB set index, then indexing in order from high to low according to the comb index, and then indexing in order from high to low according to the resource block group index; or, first indexing in order from high to low according to the comb index, then indexing in order from high to low according to the RB set index, and then indexing in order from high to low according to the resource block group index.

[0272] Based on A and B a 、C a,b The number of resource block groups included in a second candidate transmission resource set and the corresponding resource block group information (such as the indexing method described above) can be determined by using N and N to determine the resource block group information included in each second candidate transmission resource set. For example, the number of resource block groups included in a second candidate transmission resource set is Then the first of the second candidate transmission resource sets includes a resource block group indexed as [0, L2-1], the second of the second candidate transmission resource sets includes a resource block group indexed as [L2, 2L2-1], and so on.

[0273] The present application also provides an indexing method for resources in the second candidate transmission resource set determined at a granularity of resource block groups. The resource indexing method may include, for example:

[0274] 1) The transmission resources in the second candidate transmission resource set are first indexed in ascending order according to the resource block group index and then in ascending order according to the code domain resource index; or,

[0275] 2) The transmission resources in the second candidate transmission resource set are first indexed in descending order of resource block group index and then in descending order of code domain resource index.

[0276] It should be understood that for a PSFCH transmission occasion or PSFCH time slot, the PSFCH candidate transmission resource set corresponding to the transmission opportunity can be determined based on the RB set information that can be used for PSFCH transmission, the comb tooth information that can be used for PSFCH transmission included in the RB set, the resource block group information that can be used for PSFCH transmission included in a comb tooth, and the available code domain resources. Among them, the RB set information that can be used for PSFCH transmission, the comb tooth information that can be used for PSFCH transmission included in the RB set, and the resource block group information that can be used for PSFCH transmission included in a comb tooth can determine the frequency domain resources available for PSFCH, and the code domain resource information can determine the code domain resources available for PSFCH. The above divides the PSFCH candidate resource set into N second candidate resource sets based on the frequency domain granularity of RB set, comb tooth, resource block group, etc., and then the corresponding second candidate resource set can be determined based on the transmission opportunity index n of PSFCH.

[0277] After determining the second candidate transmission resource set to which the dedicated RB or transmission resource of the first PSFCH belongs, the dedicated RB or transmission resource of the first PSFCH can be determined in the second candidate transmission resource set through the following embodiment 2-1 or embodiment 2-2.

[0278] Example 2-1

[0279] The dedicated RB or transmission resource occupied by the first PSFCH may be determined from the second set of candidate transmission resources based on a twenty-first parameter. The twenty-first parameter includes one or more of the following: a second parameter, a third parameter, a fourth parameter, a fifth parameter, a sixth parameter, a seventh parameter, an eighth parameter, a ninth parameter, and an eleventh parameter.

[0280] For descriptions of the second parameter, the third parameter, the fourth parameter, the fifth parameter, the sixth parameter, the seventh parameter, the eighth parameter and the ninth parameter, please refer to the first embodiment.

[0281] The eleventh parameter may be determined based on the total number of resources included in the second candidate transmission resource set. For example, the eleventh parameter may include the total number of resources included in the second candidate transmission resource set. The eleventh parameter may be recorded as M total-2 .

[0282] In some embodiments, the twenty-first parameter includes: the index corresponding to the first subchannel of the first PSSCH transmission resource, the time slot index corresponding to the first PSSCH transmission resource, the index of the first RB set corresponding to the first PSSCH transmission resource, the total number of resources included in the second candidate transmission resource set, and the first identification information.

[0283] In some embodiments, the twenty-first parameter includes: the index corresponding to the first subchannel of the first PSSCH transmission resource, the time slot index corresponding to the first PSSCH transmission resource, the index of the first RB set corresponding to the first PSSCH transmission resource, the number of RB sets corresponding to the first PSSCH transmission resource, the total number of resources included in the second candidate transmission resource set, and the first identification information.

[0284] In some embodiments, the twenty-first parameter includes: the index corresponding to the first subchannel of the first PSSCH transmission resource, the number of subchannels included in the transmission resource of the first PSSCH, the time slot index corresponding to the first PSSCH transmission resource, the index of the first RB set corresponding to the first PSSCH transmission resource, the total number of resources included in the second candidate transmission resource set, and the first identification information.

[0285] In some embodiments, the twenty-first parameter includes: the index corresponding to the first subchannel of the first PSSCH transmission resource, the number of subchannels included in the transmission resources of the first PSSCH, the time slot index corresponding to the first PSSCH transmission resource, the index of the first RB set corresponding to the first PSSCH transmission resource, the number of RB sets corresponding to the first PSSCH transmission resource, the total number of resources included in the second candidate transmission resource set, and the first identification information.

[0286] In some embodiments, the twenty-first parameter includes: the index corresponding to the first comb tooth of the first PSSCH transmission resource, the time slot index corresponding to the first PSSCH transmission resource, the index of the first RB set corresponding to the first PSSCH transmission resource, the total number of resources included in the second candidate transmission resource set, and the first identification information.

[0287] In some embodiments, the twenty-first parameter includes: the index corresponding to the first comb tooth of the first PSSCH transmission resource, the time slot index corresponding to the first PSSCH transmission resource, the index of the first RB set corresponding to the first PSSCH transmission resource, the number of RB sets corresponding to the first PSSCH transmission resource, the total number of resources included in the second candidate transmission resource set, and the first identification information.

[0288] In some embodiments, the twenty-first parameter includes: an index corresponding to the first subchannel of the first PSSCH transmission resource, a time slot index corresponding to the first PSSCH transmission resource, an index of the first RB set corresponding to the first PSSCH transmission resource, and first identification information.

[0289] In some embodiments, the twenty-first parameter includes: an index corresponding to the first subchannel of the first PSSCH transmission resource, a time slot index corresponding to the first PSSCH transmission resource, an index of the first RB set corresponding to the first PSSCH transmission resource, the number of RB sets corresponding to the first PSSCH transmission resource, and first identification information.

[0290] In some embodiments, the twenty-first parameter includes: the index corresponding to the first subchannel of the first PSSCH transmission resource, the number of subchannels included in the first PSSCH transmission resource, the time slot index corresponding to the first PSSCH transmission resource, the index of the first RB set corresponding to the first PSSCH transmission resource, and the first identification information.

[0291] In some embodiments, the twenty-first parameter includes: an index corresponding to the first subchannel of the first PSSCH transmission resource, the number of subchannels included in the transmission resources of the first PSSCH, a time slot index corresponding to the first PSSCH transmission resource, an index of the first RB set corresponding to the first PSSCH transmission resource, the number of RB sets corresponding to the transmission resources of the first PSSCH, and first identification information.

[0292] In some embodiments, the twenty-first parameter includes: an index corresponding to the first comb tooth of the first PSSCH transmission resource, a time slot index corresponding to the first PSSCH transmission resource, an index of the first RB set corresponding to the first PSSCH transmission resource, and first identification information.

[0293] In some embodiments, the twenty-first parameter includes: the index corresponding to the first comb tooth of the first PSSCH transmission resource, the time slot index corresponding to the first PSSCH transmission resource, the index of the first RB set corresponding to the first PSSCH transmission resource, the number of RB sets corresponding to the first PSSCH transmission resource, and the first identification information.

[0294] In some embodiments, the first terminal device may determine, based on the twenty-first parameter, an index corresponding to the transmission resource of the first PSFCH from the second candidate transmission resource set, and determine, based on the index, the dedicated RB or transmission resource occupied by the first PSFCH. Under different division granularities, the indexing method of the resources in the second candidate transmission resource set is as described above and will not be repeated here.

[0295] Example 2-2

[0296] In this embodiment, the dedicated RB or transmission resource occupied by the first PSFCH can be determined from the third candidate transmission resource set, and the third candidate transmission resource set can be determined from the second candidate transmission resource set. The second candidate transmission resource set can be divided into multiple third candidate transmission resource sets. The first terminal device can first determine the third candidate transmission resource set that carries the first PSFCH from the multiple third candidate transmission resource sets, and then determine the dedicated RB or transmission resource occupied by the first PSFCH in the third candidate resource set.

[0297] In some embodiments, the third candidate transmission resource set may be determined from the second candidate transmission resource set based on a twelfth parameter. The twelfth parameter may include one or more of the following: a second parameter, a third parameter, a fourth parameter, a fifth parameter, a sixth parameter, and an eleventh parameter. The meaning of each parameter can be found above and will not be further described here.

[0298] In some embodiments, the twelfth parameter includes: the index corresponding to the first subchannel of the first PSSCH transmission resource, the time slot index corresponding to the first PSSCH transmission resource, the index of the first RB set corresponding to the first PSSCH transmission resource, and the total number of resources included in the second candidate transmission resource set.

[0299] In some embodiments, the twelfth parameter includes: the index corresponding to the first subchannel of the first PSSCH transmission resource, the time slot index corresponding to the first PSSCH transmission resource, the index of the first RB set corresponding to the first PSSCH transmission resource, the number of RB sets corresponding to the first PSSCH transmission resource, and the total number of resources included in the second candidate transmission resource set.

[0300] In some embodiments, the twelfth parameter includes: the index corresponding to the first subchannel of the first PSSCH transmission resource, the number of subchannels included in the first PSSCH transmission resource, the time slot index corresponding to the first PSSCH transmission resource, the index of the first RB set corresponding to the first PSSCH transmission resource, and the total number of resources included in the second candidate transmission resource set.

[0301] In some embodiments, the twelfth parameter includes: the index corresponding to the first subchannel of the first PSSCH transmission resource, the number of subchannels included in the transmission resource of the first PSSCH, the time slot index corresponding to the first PSSCH transmission resource, the index of the first RB set corresponding to the first PSSCH transmission resource, the number of RB sets corresponding to the first PSSCH transmission resource, and the total number of resources included in the second candidate transmission resource set.

[0302] In some embodiments, the twelfth parameter includes: the index corresponding to the first comb tooth of the first PSSCH transmission resource, the time slot index corresponding to the first PSSCH transmission resource, the index of the first RB set corresponding to the first PSSCH transmission resource, and the total number of resources included in the second candidate transmission resource set.

[0303] In some embodiments, the twelfth parameter includes: the index corresponding to the first comb tooth of the first PSSCH transmission resource, the time slot index corresponding to the first PSSCH transmission resource, the index of the first RB set corresponding to the first PSSCH transmission resource, the number of RB sets corresponding to the first PSSCH transmission resource, and the total number of resources included in the second candidate transmission resource set.

[0304] In some embodiments, the twelfth parameter includes: an index corresponding to a first subchannel of the first PSSCH transmission resource, an index of a time slot corresponding to the first PSSCH transmission resource, and an index of a first RB set corresponding to the first PSSCH transmission resource.

[0305] In some embodiments, the twelfth parameter includes: the index corresponding to the first subchannel of the first PSSCH transmission resource, the time slot index corresponding to the first PSSCH transmission resource, the index of the first RB set corresponding to the first PSSCH transmission resource, and the number of RB sets corresponding to the first PSSCH transmission resource.

[0306] In some embodiments, the twelfth parameter includes: the index corresponding to the first subchannel of the first PSSCH transmission resource, the number of subchannels included in the first PSSCH transmission resource, the time slot index corresponding to the first PSSCH transmission resource, and the index of the first RB set corresponding to the first PSSCH transmission resource.

[0307] In some embodiments, the twelfth parameter includes: the index corresponding to the first subchannel of the first PSSCH transmission resource, the number of subchannels included in the first PSSCH transmission resource, the time slot index corresponding to the first PSSCH transmission resource, the index of the first RB set corresponding to the first PSSCH transmission resource, and the number of RB sets corresponding to the first PSSCH transmission resource.

[0308] In some embodiments, the twelfth parameter includes: an index corresponding to a first comb tooth of the first PSSCH transmission resource, a time slot index corresponding to the first PSSCH transmission resource, and an index of a first RB set corresponding to the first PSSCH transmission resource.

[0309] In some embodiments, the twelfth parameter includes: the index corresponding to the first comb tooth of the first PSSCH transmission resource, the time slot index corresponding to the first PSSCH transmission resource, the index of the first RB set corresponding to the first PSSCH transmission resource, and the number of RB sets corresponding to the first PSSCH transmission resource.

[0310] In some embodiments, the dedicated RB or transmission resource occupied by the first PSFCH is determined from a third candidate transmission resource set based on a thirteenth parameter. The thirteenth parameter may include one or more of the following: the third parameter, the fifth parameter, the sixth parameter, the ninth parameter, and the fourteenth parameter.

[0311] The fourteenth parameter may be determined based on the total number of resources included in the third candidate transmission resource set. For example, the fourteenth parameter may be equal to the total number of resources included in the third candidate transmission resource set.

[0312] In some implementations, the thirteenth parameter includes: first identification information, and the total number of resources included in the third candidate transmission resource set.

[0313] In some implementations, the thirteenth parameter includes: first identification information, the total number of resources included in the third candidate transmission resource set, and the number of sub-channels included in the transmission resources of the first PSSCH.

[0314] In some implementations, the thirteenth parameter includes: first identification information, the total number of resources included in the third candidate transmission resource set, and the number of RB sets corresponding to the transmission resources of the first PSSCH.

[0315] In some embodiments, the thirteenth parameter includes: first identification information, the total number of resources included in the third candidate transmission resource set, the number of subchannels included in the transmission resources of the first PSSCH, and the number of RB sets corresponding to the transmission resources of the first PSSCH.

[0316] Optionally, one of the twelfth parameter and the thirteenth parameter may include the third parameter, that is, the twelfth parameter includes the third parameter and the thirteenth parameter does not include the third parameter.

[0317] Optionally, one of the twelfth parameter and the thirteenth parameter may include the fifth parameter, that is, the twelfth parameter includes the fifth parameter and the thirteenth parameter does not include the fifth parameter.

[0318] Optionally, one of the twelfth parameter and the thirteenth parameter may include the sixth parameter, that is, the twelfth parameter includes the sixth parameter and the thirteenth parameter does not include the sixth parameter.

[0319] Therefore, it can be seen that if the third candidate transmission resource set is determined based on one or more of the third parameter, the fifth parameter, and the sixth parameter, the corresponding parameters may not be considered when determining the dedicated RB or transmission resource for the first PSFCH. If the third candidate transmission resource set is not determined based on one or more of the third parameter, the fifth parameter, and the sixth parameter, the corresponding parameters need to be considered when determining the dedicated RB or transmission resource for the first PSFCH.

[0320] As can be seen from the parameters for determining the third candidate transmission resource set, the third candidate transmission resource set can be determined based on the time slot information, subchannel information, and RB set information corresponding to the PSSCH transmission. Within the third candidate transmission resource set, the first terminal device can further determine the specific PSFCH transmission resource based on the ninth parameter (i.e., identification information).

[0321] As described above, the determination method of the second candidate transmission resource set is related to the frequency domain resource granularity. For the second candidate transmission resource set determined with different frequency domain resource granularity, the following describes the determination method of the third candidate transmission resource set.

[0322] If the determined second candidate transmission resource set is based on the granularity of the RB set (that is, one or more RB sets that can be used to transmit the first PSFCH are determined based on the PSFCH transmission opportunity index, and one or more RB sets constitute the second candidate transmission resource set), then the third candidate transmission resource set can be determined by the following method 1 or method 2.

[0323] Mode 1: The third candidate transmission resource set is determined with comb teeth as the granularity (i.e., one or more comb teeth that can be used to transmit the first PSFCH are determined from the second candidate transmission resource set based on the twelfth parameter, and one or more comb teeth constitute the third candidate transmission resource set).

[0324] The total number of comb teeth included in the second candidate transmission resource set can be determined in the following manner. The second candidate resource set includes A2 RB sets, B2 aIndicates the number of comb teeth (excluding common comb teeth) that can be used for PSFCH transmission in RB set a. The total number of comb teeth included in A2 RB sets is

[0325] When the third transmission resource set is determined with a comb-tooth granularity, the indexing method of the resources in the second candidate resource set may be:

[0326] 1) The transmission resources in the second candidate transmission resources are first indexed in ascending order according to the RB set index, and then indexed in ascending order according to the comb index; or

[0327] 2) The transmission resources in the second candidate transmission resources are first indexed in ascending order according to the comb index, and then indexed in ascending order according to the RB set index; or

[0328] 3) The transmission resources in the second candidate transmission resources are first indexed in descending order according to the RB set index, and then indexed in descending order according to the comb index; or,

[0329] 4) The transmission resources in the second candidate transmission resources are first indexed in descending order of comb index, and then indexed in descending order of RB set index.

[0330] Furthermore, the first terminal device may determine a third candidate transmission resource set from the second candidate transmission resource set based on the twelfth parameter. In this manner, the determined third candidate transmission resource set is based on a comb tooth granularity.

[0331] It should be noted that the total number of resources included in the third candidate transmission resource set can be determined based on one or more of the number of comb teeth included in the third candidate transmission resource set, the number of resource block groups included in the comb teeth that can be used for PSFCH transmission, the number of transmission resources that can be code-division multiplexed, the number of RB sets corresponding to the transmission resources of the first PSSCH, and the number of subchannels or the number of comb teeth corresponding to the transmission resources of the first PSSCH.

[0332] The resources in the third candidate transmission resource set with the comb teeth as the granularity can be indexed as follows:

[0333] 1) The transmission resources in the third candidate transmission resources are first indexed in ascending order according to the comb index, then in ascending order according to the resource block group index, and then in ascending order according to the code domain resource index; or,

[0334] 2) The transmission resources in the third candidate transmission resources are first indexed in ascending order of resource block group index, then in ascending order of comb index, and then in ascending order of code domain resource index; or

[0335] 3) The transmission resources in the third candidate transmission resources are first indexed in descending order of comb index, then in descending order of resource block group index, and then in descending order of code domain resource index; or,

[0336] 4) The transmission resources in the third candidate transmission resources are first indexed in descending order of resource block group index, then in descending order of comb index, and finally in descending order of code domain resource index.

[0337] The first terminal device may determine the index corresponding to the first PSFCH transmission resource in the third candidate transmission resource set based on the thirteenth parameter. For example, if the thirteenth parameter includes the ninth parameter, the first terminal device may determine the index of the first PSFCH transmission resource in the third candidate transmission resource set based on the ninth parameter. Further, the dedicated RB or transmission resource occupied by the first PSFCH may be determined based on the index.

[0338] Method 2: The third transmission resource set is determined with resource block group as the granularity (i.e., one or more resource block groups that can be used to transmit the first PSFCH are determined from the second candidate transmission resource set based on the twelfth parameter, and one or more resource block groups constitute the third candidate transmission resource set).

[0339] The total number of resource block groups included in the second candidate transmission resource set can be determined in the following manner. The second candidate resource set includes A2 RB sets, B2 a Indicates the number of comb teeth (excluding common comb teeth) that can be used for PSFCH transmission in RB set a, C2 a,b Indicates the number of resource block groups that can be used for PSFCH transmission included in the comb b of RB set a. The total number of resource block groups included in A2 RB sets is

[0340] When the third transmission resource set is determined with resource block groups as the granularity, the indexing method of the resources in the second candidate resource set may be:

[0341] 1) The transmission resources in the second candidate transmission resources are first indexed in ascending order according to the RB set index, then in ascending order according to the comb index, and then in ascending order according to the resource block group index; or,

[0342] 2) The transmission resources in the second candidate transmission resources are first indexed in ascending order of resource block group index, then in ascending order of comb index, and then in ascending order of RB set index; or,

[0343] 3) The transmission resources in the second candidate transmission resources are first indexed in ascending order according to the comb index, then in ascending order according to the RB set index, and then in ascending order according to the resource block group index; or,

[0344] 4) The transmission resources in the second candidate transmission resources are first indexed in ascending order according to the comb index, then in ascending order according to the resource block group index, and then in ascending order according to the RB set index; or,

[0345] 5) The transmission resources in the second candidate transmission resources are first indexed in descending order according to the RB set index, then in descending order according to the comb index, and then in descending order according to the resource block group index; or,

[0346] 6) The transmission resources in the second candidate transmission resources are first indexed in descending order of resource block group index, then in descending order of comb index, and then in descending order of RB set index; or,

[0347] 7) The transmission resources in the second candidate transmission resources are first indexed in descending order according to the comb index, then in descending order according to the RB set index, and then in descending order according to the resource block group index; or,

[0348] 8) The transmission resources in the second candidate transmission resources are first indexed in descending order of comb index, then in descending order of resource block group index, and finally in descending order of RB set index.

[0349] Furthermore, the first terminal device may determine a third candidate transmission resource set from the second candidate transmission resource set based on the twelfth parameter. In this manner, the determined third candidate transmission resource set is based on a resource block group granularity.

[0350] It should be noted that the total number of resources included in the third candidate transmission resource set can be determined based on one or more of the number of resource block groups that can be used for PSFCH transmission included in the third candidate transmission resource set, the number of transmission resources that can be code-division multiplexed, the number of RB sets corresponding to the transmission resources of the first PSSCH, and the number of subchannels or the number of comb teeth corresponding to the transmission resources of the first PSSCH.

[0351] The resources in the third candidate transmission resource set with resource block group as the granularity can be indexed as follows:

[0352] 1) The transmission resources in the third candidate transmission resources are first indexed in ascending order according to the resource block group index, and then indexed in ascending order according to the code domain resource index; or,

[0353] 2) The transmission resources in the third candidate transmission resources are first indexed in descending order of resource block group index, and then in descending order of code domain resource index.

[0354] The first terminal device may determine the index corresponding to the first PSFCH transmission resource in the third candidate transmission resource set based on the thirteenth parameter. For example, if the thirteenth parameter includes the ninth parameter, the first terminal device may determine the index of the first PSFCH transmission resource in the third candidate transmission resource set based on the ninth parameter. Further, the dedicated RB or transmission resource occupied by the first PSFCH may be determined based on the index.

[0355] If the determined second candidate transmission resource set is based on the granularity of comb teeth (that is, one or more comb teeth that can be used to transmit the first PSFCH are determined based on the PSFCH transmission opportunity index, and one or more comb teeth constitute the second candidate transmission resource set), then the third candidate transmission resource set can be determined by the following method 3 or method 4.

[0356] Mode 3: The third transmission resource set is determined with comb teeth as the granularity (i.e., one or more comb teeth that can be used to transmit the first PSFCH are determined from the second candidate transmission resource set based on the twelfth parameter, and one or more comb teeth constitute the third candidate transmission resource set).

[0357] The total number of comb teeth included in the second candidate transmission resource set may be represented by B. B may not include the number of common comb teeth.

[0358] When the third transmission resource set is determined with a comb-tooth granularity, the indexing method of the resources in the second candidate resource set may be:

[0359] 1) The second candidate transmission resource set is indexed in order from high to low according to the comb index; or,

[0360] 2) The second candidate transmission resource set is indexed in order of comb index from low to high.

[0361] Furthermore, the first terminal device may determine a third candidate transmission resource set from the second candidate transmission resource set based on the twelfth parameter. In this manner, the determined third candidate transmission resource set is based on a comb tooth granularity.

[0362] It should be noted that the total number of resources included in the third candidate transmission resource set can be determined based on one or more of the number of comb teeth included in the third candidate transmission resource set, the number of resource block groups included in the comb teeth that can be used for PSFCH transmission, the number of transmission resources that can be code-division multiplexed, the number of RB sets corresponding to the transmission resources of the first PSSCH, and the number of subchannels or the number of comb teeth corresponding to the transmission resources of the first PSSCH.

[0363] The resources in the third candidate transmission resource set with the comb teeth as the granularity can be indexed as follows:

[0364] 1) The transmission resources in the third candidate transmission resources are first indexed in ascending order according to the comb index, then in ascending order according to the resource block group index, and then in ascending order according to the code domain resource index; or,

[0365] 2) The transmission resources in the third candidate transmission resources are first indexed in ascending order according to the resource block group index, then in ascending order according to the comb index, and then in ascending order according to the code domain resource index; or,

[0366] 3) The transmission resources in the third candidate transmission resources are first indexed in descending order according to the comb index, then in descending order according to the resource block group index, and then in descending order according to the code domain resource index; or,

[0367] 4) The transmission resources in the third candidate transmission resources are first indexed in descending order of resource block group index, then in descending order of comb index, and finally in descending order of code domain resource index.

[0368] The first terminal device may determine the index corresponding to the first PSFCH transmission resource in the third candidate transmission resource set based on the thirteenth parameter. For example, if the thirteenth parameter includes the ninth parameter, the first terminal device may determine the index of the first PSFCH transmission resource in the third candidate transmission resource set based on the ninth parameter. Further, the dedicated RB or transmission resource occupied by the first PSFCH may be determined based on the index.

[0369] Mode 4: The third transmission resource set is determined with resource block group as the granularity (i.e., one or more resource block groups that can be used to transmit the first PSFCH are determined from the second candidate transmission resource set based on the twelfth parameter, and the one or more resource block groups constitute the third candidate transmission resource set).

[0370] The total number of resource block groups included in the second candidate transmission resource set can be determined in the following manner: B represents the number of comb teeth included in the second candidate transmission resource set (which may not include common comb teeth), C b Indicates the number of resource block groups that can be used for PSFCH transmission included in comb b. The total number of resource block groups included in the second candidate transmission resource set can be

[0371] When the third transmission resource set is determined with resource block groups as the granularity, the indexing method of the resources in the second candidate resource set may be:

[0372] 1) The transmission resources in the second candidate transmission resources are first indexed in ascending order according to the comb index, and then indexed in ascending order according to the resource block group index; or,

[0373] 2) The transmission resources in the second candidate transmission resources are first indexed in ascending order according to the resource block group index, and then indexed in ascending order according to the comb index; or,

[0374] 3) The transmission resources in the second candidate transmission resources are first indexed in descending order according to the comb index, and then indexed in descending order according to the resource block group index; or,

[0375] 4) The transmission resources in the second candidate transmission resources are first indexed in descending order of resource block group index, and then indexed in descending order of comb index.

[0376] Furthermore, the first terminal device may determine a third candidate transmission resource set from the second candidate transmission resource set based on the twelfth parameter. In this manner, the determined third candidate transmission resource set is based on a resource block group granularity.

[0377] It should be noted that the total number of resources included in the third candidate transmission resource set can be determined based on one or more of the number of resource block groups that can be used for PSFCH transmission included in the third candidate transmission resource set, the number of transmission resources that can be code-division multiplexed, the number of RB sets corresponding to the transmission resources of the first PSSCH, and the number of subchannels or the number of comb teeth corresponding to the transmission resources of the first PSSCH.

[0378] The resources in the third candidate transmission resource set with resource block group as the granularity can be indexed as follows:

[0379] 1) The transmission resources in the third candidate transmission resources are first indexed in ascending order according to the resource block group index, and then indexed in ascending order according to the code domain resource index; or,

[0380] 2) The transmission resources in the third candidate transmission resources are first indexed in descending order of resource block group index, and then in descending order of code domain resource index.

[0381] The first terminal device may determine the index corresponding to the first PSFCH transmission resource in the third candidate transmission resource set based on the thirteenth parameter. For example, if the thirteenth parameter includes the ninth parameter, the first terminal device may determine the index of the first PSFCH transmission resource in the third candidate transmission resource set based on the ninth parameter. Further, the dedicated RB or transmission resource occupied by the first PSFCH may be determined based on the index.

[0382] If the determined second candidate transmission resource set is based on the granularity of resource block groups (i.e., one or more resource block groups that can be used to transmit the first PSFCH are determined based on the PSFCH transmission opportunity index, and one or more resource block groups constitute the second candidate transmission resource set), then the third candidate transmission resource set can be determined by the following method 5.

[0383] Mode 5: The third transmission resource set is determined with resource block group as the granularity (i.e., one or more resource block groups that can be used to transmit the first PSFCH are determined from the second candidate transmission resource set based on the twelfth parameter, and the one or more resource block groups constitute the third candidate transmission resource set).

[0384] The total number of resource block groups included in the second candidate transmission resource set can be represented by C.

[0385] When the third transmission resource set is determined with resource block groups as the granularity, the indexing method of the resources in the second candidate resource set may be:

[0386] 1) The transmission resources in the second candidate transmission resources are indexed in ascending order of resource block group index; or,

[0387] 2) The transmission resources in the second candidate transmission resources are indexed in descending order of resource block group index.

[0388] Furthermore, the first terminal device may determine a third candidate transmission resource set from the second candidate transmission resource set based on the twelfth parameter. In this manner, the determined third candidate transmission resource set is based on a resource block group granularity.

[0389] It should be noted that the total number of resources included in the third candidate transmission resource set can be determined based on one or more of the number of resource block groups that can be used for PSFCH transmission included in the third candidate transmission resource set, the number of transmission resources that can be code-division multiplexed, the number of RB sets corresponding to the transmission resources of the first PSSCH, and the number of subchannels or the number of comb teeth corresponding to the transmission resources of the first PSSCH.

[0390] The resources in the third candidate transmission resource set with resource block group as the granularity can be indexed as follows:

[0391] 1) The transmission resources in the third candidate transmission resources are first indexed in ascending order according to the resource block group index, and then indexed in ascending order according to the code domain resource index; or,

[0392] 2) The transmission resources in the third candidate transmission resources are first indexed in descending order of resource block group index, and then in descending order of code domain resource index.

[0393] The first terminal device may determine the index corresponding to the first PSFCH transmission resource in the third candidate transmission resource set based on the thirteenth parameter. For example, if the thirteenth parameter includes the ninth parameter, the first terminal device may determine the index of the first PSFCH transmission resource in the third candidate transmission resource set based on the ninth parameter. Further, the dedicated RB or transmission resource occupied by the first PSFCH may be determined based on the index.

[0394] The index corresponding to the first PSFCH transmission resource in the third candidate transmission resource set can be determined by the above-mentioned methods 1 to 5. The first terminal device can determine the dedicated RB or transmission resource occupied by the first PSFCH according to the index.

[0395] Example 3

[0396] In the third embodiment, the candidate transmission resource subset may be referred to as a fourth candidate transmission resource set. That is, the dedicated RB occupied by the first PSFCH or the transmission resource occupied by the first PSFCH is determined from the fourth candidate transmission resource set.

[0397] The fourth candidate transmission resource set may be determined based on the transmission resources of the PSSCH associated with the PSFCH. In other words, the PSFCH transmission resource set may be divided into multiple fourth candidate resource sets, from which one fourth candidate transmission resource set is determined based on the transmission resources of the PSSCH associated with the PSFCH.

[0398] In some embodiments, the fourth candidate transmission resource set may be determined based on a fifteenth parameter. The fifteenth parameter may, for example, include one or more of the following: a second parameter, a third parameter, a fourth parameter, a fifth parameter, and a sixth parameter. For descriptions of the second parameter, the third parameter, the fourth parameter, the fifth parameter, and the sixth parameter, please refer to the above and will not be repeated here.

[0399] In some embodiments, the fifteenth parameter includes: an index corresponding to a first subchannel of the first PSSCH transmission resource, an index of a time slot corresponding to the first PSSCH transmission resource, and an index of a first RB set corresponding to the first PSSCH transmission resource.

[0400] In some embodiments, the fifteenth parameter includes: the index corresponding to the first subchannel of the first PSSCH transmission resource, the time slot index corresponding to the first PSSCH transmission resource, the index of the first RB set corresponding to the first PSSCH transmission resource, and the number of RB sets corresponding to the first PSSCH transmission resource.

[0401] In some embodiments, the fifteenth parameter includes: the index corresponding to the first subchannel of the first PSSCH transmission resource, the number of subchannels included in the first PSSCH transmission resource, the time slot index corresponding to the first PSSCH transmission resource, and the index of the first RB set corresponding to the first PSSCH transmission resource.

[0402] In some embodiments, the fifteenth parameter includes: the index corresponding to the first subchannel of the first PSSCH transmission resource, the number of subchannels included in the first PSSCH transmission resource, the time slot index corresponding to the first PSSCH transmission resource, the index of the first RB set corresponding to the first PSSCH transmission resource, and the number of RB sets corresponding to the first PSSCH transmission resource.

[0403] In some embodiments, the fifteenth parameter includes: an index corresponding to a first comb tooth of the first PSSCH transmission resource, a time slot index corresponding to the first PSSCH transmission resource, and an index of a first RB set corresponding to the first PSSCH transmission resource.

[0404] In some embodiments, the fifteenth parameter includes: the index corresponding to the first comb tooth of the first PSSCH transmission resource, the time slot index corresponding to the first PSSCH transmission resource, the index of the first RB set corresponding to the first PSSCH transmission resource, and the number of RB sets corresponding to the first PSSCH transmission resource.

[0405] The following describes the technical solutions for dividing the PSFCH transmission resource set into multiple fourth candidate transmission resource sets using RB sets, comb teeth, and resource block groups as frequency domain granularities.

[0406] Determine the fourth candidate transmission resource set based on the RB set granularity

[0407] The PSFCH transmission resource set can be divided into multiple fourth candidate transmission resource sets based on the granularity of the RB set. Exemplarily, one or more RB sets that can be used to transmit the first PSFCH are determined based on the fifteenth parameter. The one or more RB sets constitute the fourth candidate transmission resource set.

[0408] Exemplarily, the number of transmission resources included in the fourth candidate transmission resource and the corresponding RB set information may be determined based on the first number A and the fifteenth parameter. The first number may be determined based on the number of the first RB set available for PSFCH transmission.

[0409] The present application also provides an indexing method for resources in the fourth candidate transmission resource set determined with the RB set as the granularity. The resource indexing method may include, for example:

[0410] 1) The transmission resources in the fourth candidate transmission resource set are first indexed in ascending order of RB set index, then in ascending order of comb index, then in ascending order of resource block group index, and finally in ascending order of code domain resource index; or,

[0411] 2) The transmission resources in the fourth candidate transmission resource set are first indexed in ascending order of comb index, then in ascending order of resource block group index, then in ascending order of RB set index, and finally in ascending order of code domain resource index; or,

[0412] 3) The transmission resources in the fourth candidate transmission resource set are first indexed in ascending order of comb index, then in ascending order of RB set index, then in ascending order of resource block group index, and finally in ascending order of code domain resource index; or,

[0413] 4) The transmission resources in the fourth candidate transmission resource set are first indexed in ascending order of resource block group index, then in ascending order of comb index, then in ascending order of RB set index, and finally in ascending order of code domain resource index; or

[0414] 5) The transmission resources in the fourth candidate transmission resource set are first indexed in descending order of RB set index, then in descending order of comb index, then in descending order of resource block group index, and finally in descending order of code domain resource index; or,

[0415] 6) The transmission resources in the fourth candidate transmission resource set are first indexed in descending order of comb index, then in descending order of resource block group index, then in descending order of RB set index, and finally in descending order of code domain resource index; or,

[0416] 7) The transmission resources in the fourth candidate transmission resource set are first indexed in descending order of comb index, then in descending order of RB set index, then in descending order of resource block group index, and finally in descending order of code domain resource index; or,

[0417] 8) The transmission resources in the fourth candidate transmission resource set are first indexed in descending order of resource block group index, then in descending order of comb index, then in descending order of RB set index, and finally in descending order of code domain resource index.

[0418] Determine the fourth candidate transmission resource set using the comb teeth as the granularity

[0419] The PSFCH transmission resource set may be divided into multiple fourth candidate transmission resource sets with comb teeth as granularity. Exemplarily, one or more comb teeth that can be used to transmit the first PSFCH may be determined based on the fifteenth parameter, and the one or more comb teeth constitute the fourth candidate transmission resource set.

[0420] Exemplarily, the number of comb teeth included in the fourth candidate transmission resource set and the corresponding comb tooth information can be determined based on the first number A, the second number Ba and the fifteenth parameter. The first number can be determined based on the number of first RB sets that can be used for PSFCH transmission; the second number can be determined based on the number of comb teeth included in one RB in the first RB set that can be used for PSFCH transmission. For example, the total number of comb teeth included in A RB sets is

[0421] For resources in the fourth candidate transmission resource set, they can be indexed in the following ways:

[0422] 1) The transmission resources in the fourth candidate transmission resource set are first indexed in ascending order according to the comb index, then in ascending order according to the resource block group index, and then in ascending order according to the code domain resource index; or,

[0423] 2) The transmission resources in the fourth candidate transmission resource set are first indexed in ascending order of resource block group index, then in ascending order of comb index, and then in ascending order of code domain resource index; or,

[0424] 3) The transmission resources in the fourth candidate transmission resource set are first indexed in descending order of comb index, then in descending order of resource block group index, and then in descending order of code domain resource index; or,

[0425] 4) The transmission resources in the fourth candidate transmission resource set are first indexed in descending order of resource block group index, then in descending order of comb index, and finally in descending order of code domain resource index.

[0426] Determine the fourth candidate transmission resource set based on the resource block group granularity

[0427] The PSFCH transmission resource set can be divided into multiple fourth candidate transmission resource sets based on the granularity of resource block groups. Exemplarily, one or more resource block groups that can be used to transmit the first PSFCH are determined based on the fifteenth parameter, and the one or more resource block groups constitute the fourth candidate transmission resource set.

[0428] In some embodiments, the number of resource block groups included in the fourth candidate transmission resource and the corresponding resource block group information can be based on the first number A, the second number B a 、The third quantity Ca,b And the fifteenth parameter is determined. Among them, the first number can be determined based on the number of the first RB set that can be used for PSFCH transmission; the second number can be determined based on the number of comb teeth that can be used for PSFCH transmission contained in an RB in the first RB set; the third number can be determined based on the number of resource block groups that can be used for PSFCH transmission contained in a comb tooth in an RB set. For example, A represents the number of RB sets, B a Indicates the number of comb teeth (excluding common comb teeth) that can be used for PSFCH transmission in RB set a, C a,b Indicates the number of resource block groups that can be used for PSFCH transmission included in the comb b of RB set a. The total number of resource block groups included in A RB sets is

[0429] For resources in the fourth candidate transmission resource set, they can be indexed in the following ways:

[0430] 1) The transmission resources in the fourth candidate transmission resource set are first indexed in ascending order according to the resource block group index and then in ascending order according to the code domain resource index; or,

[0431] 2) The transmission resources in the fourth candidate transmission resource set are first indexed in descending order of resource block group index and then in descending order of code domain resource index.

[0432] After determining the fourth candidate transmission resource set to which the dedicated RB or transmission resource of the first PSFCH belongs, the dedicated RB or transmission resource of the first PSFCH can be determined in the fourth candidate transmission resource set through the following embodiment 3-1 or embodiment 3-2.

[0433] Example 3-1

[0434] The dedicated RB occupied by the first PSFCH may be determined from the fourth candidate transmission resource set based on a sixteenth parameter. The sixteenth parameter includes one or more of the following: a third parameter, a fifth parameter, a sixth parameter, a seventh parameter, an eighth parameter, a ninth parameter, and a seventeenth parameter.

[0435] For descriptions of the third parameter, the fifth parameter, the sixth parameter, the seventh parameter, the eighth parameter, and the ninth parameter, please refer to the first embodiment.

[0436] The seventeenth parameter may be determined based on the total number of resources included in the fourth candidate transmission resource set. For example, the seventeenth parameter may include the total number of resources included in the fourth candidate transmission resource set. The eleventh parameter may be recorded as M total-4 .

[0437] In some implementations, the sixteenth parameter includes: an index of a transmission opportunity corresponding to the first PSFCH and first identification information.

[0438] In some implementations, the sixteenth parameter includes: an index of a transmission opportunity corresponding to the first PSFCH, a total number of resources included in the fourth candidate transmission resource set, and first identification information.

[0439] In some implementations, the sixteenth parameter includes: an index of the transmission opportunity corresponding to the first PSFCH, a total number of transmission opportunities corresponding to the first PSFCH, a total number of resources included in the fourth candidate transmission resource set, and first identification information.

[0440] In some embodiments, the sixteenth parameter includes: the number of RB sets corresponding to the transmission resources of the first PSSCH, the index of the transmission opportunity corresponding to the first PSFCH, the total number of resources included in the fourth candidate transmission resource set, and the first identification information.

[0441] In some embodiments, the sixteenth parameter includes: the number of subchannels included in the transmission resources of the first PSSCH, the index of the transmission opportunity corresponding to the first PSFCH, the total number of resources included in the fourth candidate transmission resource set, and the first identification information.

[0442] In some embodiments, the sixteenth parameter includes: the number of subchannels included in the transmission resources of the first PSSCH, the number of RB sets corresponding to the transmission resources of the first PSSCH, the index of the transmission opportunity corresponding to the first PSFCH, the total number of resources included in the fourth candidate transmission resource set, and the first identification information.

[0443] In some embodiments, the first terminal device can determine the index corresponding to the transmission resource of the first PSFCH from the fourth candidate transmission resource set based on the sixteenth parameter, and determine the dedicated RB or transmission resource occupied by the first PSFCH based on the index. Under different division granularities, the indexing method of the resources in the fourth candidate transmission resource set is as described above and will not be repeated here.

[0444] Example 3-2

[0445] In this embodiment, the dedicated RB or transmission resource occupied by the first PSFCH can be determined from the fifth candidate transmission resource set, and the fifth candidate transmission resource set can be determined from the fourth candidate transmission resource set. The fourth candidate transmission resource set can be divided into multiple fifth candidate transmission resource sets. The first terminal device can first determine the fifth candidate transmission resource set that carries the first PSFCH from the multiple fifth candidate transmission resource sets, and then determine the dedicated RB or transmission resource occupied by the first PSFCH in the fifth candidate resource set.

[0446] In some embodiments, the fifth candidate transmission resource set may be determined from the fourth candidate transmission resource set based on an eighteenth parameter. The eighteenth parameter may include one or more of the following: the seventh parameter, the eighth parameter, and the seventeenth parameter. The meaning of each parameter can be referred to above and will not be repeated here.

[0447] In some implementations, the eighteenth parameter includes: an index of a transmission opportunity corresponding to the first PSFCH.

[0448] In some implementations, the eighteenth parameter includes: an index of a transmission opportunity corresponding to the first PSFCH, and a total number of resources included in the fourth candidate transmission resource set.

[0449] In some implementations, the eighteenth parameter includes: an index of the transmission opportunity corresponding to the first PSFCH, a total number of transmission opportunities corresponding to the first PSFCH, and a total number of resources included in the fourth candidate transmission resource set.

[0450] In some embodiments, the dedicated RB or transmission resource occupied by the first PSFCH is determined from the fifth candidate transmission resource set based on a nineteenth parameter. The nineteenth parameter may include one or more of the following: the third parameter, the fifth parameter, the sixth parameter, the ninth parameter, and the twentieth parameter.

[0451] The twentieth parameter may be determined based on the total number of resources included in the fifth candidate transmission resource set. For example, the twentieth parameter may be equal to the total number of resources included in the fifth candidate transmission resource set.

[0452] In some implementations, the nineteenth parameter includes: first identification information.

[0453] In some implementations, the nineteenth parameter includes: the total number of resources included in the fifth candidate transmission resource set and the first identification information.

[0454] In some implementations, the nineteenth parameter includes: the number of RB sets corresponding to the transmission resources of the first PSSCH, the total number of resources included in the fifth candidate transmission resource set, and the first identification information.

[0455] In some implementations, the nineteenth parameter includes: the number of subchannels included in the transmission resources of the first PSSCH, the total number of resources included in the fifth candidate transmission resource set, and the first identification information.

[0456] In some embodiments, the nineteenth parameter includes: the number of RB sets corresponding to the transmission resources of the first PSSCH, the number of subchannels included in the transmission resources of the first PSSCH, the total number of resources included in the fifth candidate transmission resource set, and the first identification information.

[0457] As described above, the determination method of the fourth candidate transmission resource set is related to the frequency domain resource granularity. With respect to the fourth candidate transmission resource set determined with different frequency domain resource granularity, the following describes the determination method of the fifth candidate transmission resource set.

[0458] If the determined fourth candidate transmission resource set is based on the granularity of the RB set (that is, one or more RB sets that can be used to transmit the first PSFCH are determined based on the fifteenth parameter, and the one or more RB sets constitute the fourth candidate transmission resource set), then the fifth candidate transmission resource set can be determined by the following method 1 or method 2.

[0459] Mode 1: The fifth candidate transmission resource set is determined with comb teeth as the granularity (i.e., one or more comb teeth that can be used to transmit the first PSFCH are determined from the fourth candidate transmission resource set based on the eighteenth parameter, and one or more comb teeth constitute the fifth candidate transmission resource set).

[0460] When the fifth transmission resource set is determined with a comb-tooth granularity, the indexing method of the resources in the fourth candidate resource set may be:

[0461] 1) The transmission resources in the fourth candidate transmission resources are first indexed in ascending order according to the RB set index, and then indexed in ascending order according to the comb index; or,

[0462] 2) The transmission resources in the fourth candidate transmission resources are first indexed in ascending order according to the comb index, and then indexed in ascending order according to the RB set index; or

[0463] 3) The transmission resources in the fourth candidate transmission resources are first indexed in descending order according to the RB set index, and then indexed in descending order according to the comb index; or,

[0464] 4) The transmission resources in the fourth candidate transmission resources are first indexed in descending order of comb index, and then indexed in descending order of RB set index.

[0465] Furthermore, the first terminal device may determine the fifth candidate transmission resource set from the fourth candidate transmission resource set according to the eighteenth parameter. In this manner, the determined fifth candidate transmission resource set is based on the comb tooth granularity.

[0466] It should be noted that the total number of resources included in the fifth candidate transmission resource set can be determined based on one or more of the number of comb teeth included in the fifth candidate transmission resource set, the number of resource block groups included in the comb teeth that can be used for PSFCH transmission, the number of transmission resources that can be code-division multiplexed, the number of RB sets corresponding to the transmission resources of the first PSSCH, and the number of subchannels or the number of comb teeth corresponding to the transmission resources of the first PSSCH.

[0467] The resources in the fifth candidate transmission resource set with the comb teeth as the granularity can be indexed as follows:

[0468] 1) The transmission resources in the fifth candidate transmission resources are first indexed in ascending order according to the comb index, then in ascending order according to the resource block group index, and then in ascending order according to the code domain resource index; or,

[0469] 2) The transmission resources in the fifth candidate transmission resource are first indexed in ascending order of resource block group index, then in ascending order of comb index, and then in ascending order of code domain resource index; or

[0470] 3) The transmission resources in the fifth candidate transmission resources are first indexed in descending order of comb index, then in descending order of resource block group index, and then in descending order of code domain resource index; or,

[0471] 4) The transmission resources in the fifth candidate transmission resources are first indexed in descending order of resource block group index, then in descending order of comb index, and finally in descending order of code domain resource index.

[0472] The first terminal device may determine, in the fifth candidate transmission resource set, an index corresponding to the first PSFCH transmission resource based on the nineteenth parameter. For example, if the nineteenth parameter includes the ninth parameter, the index of the first PSFCH transmission resource in the fifth candidate transmission resource set is determined based on the ninth parameter. Further, the dedicated RB or transmission resource occupied by the first PSFCH is determined based on the index.

[0473] Method 2: The fifth transmission resource set is determined with resource block group as the granularity (i.e., one or more resource block groups that can be used to transmit the first PSFCH are determined from the fourth candidate transmission resource set based on the eighteenth parameter, and one or more resource block groups constitute the fifth candidate transmission resource set).

[0474] When the fifth transmission resource set is determined with resource block groups as the granularity, the indexing method of the resources in the fourth candidate resource set may be:

[0475] 1) The transmission resources in the fourth candidate transmission resources are first indexed in ascending order of RB set index, then in ascending order of comb index, and then in ascending order of resource block group index; or,

[0476] 2) The transmission resources in the fourth candidate transmission resources are first indexed in ascending order of resource block group index, then in ascending order of comb index, and then in ascending order of RB set index; or,

[0477] 3) The transmission resources in the fourth candidate transmission resources are first indexed in ascending order according to the comb index, then in ascending order according to the RB set index, and then in ascending order according to the resource block group index; or,

[0478] 4) The transmission resources in the fourth candidate transmission resources are first indexed in ascending order according to the comb index, then in ascending order according to the resource block group index, and then in ascending order according to the RB set index; or,

[0479] 5) The transmission resources in the fourth candidate transmission resources are first indexed in descending order according to the RB set index, then in descending order according to the comb index, and then in descending order according to the resource block group index; or,

[0480] 6) The transmission resources in the fourth candidate transmission resources are first indexed in descending order according to the resource block group index, then in descending order according to the comb index, and then in descending order according to the RB set index; or,

[0481] 7) The transmission resources in the fourth candidate transmission resources are first indexed in descending order according to the comb index, then in descending order according to the RB set index, and then in descending order according to the resource block group index; or,

[0482] 8) The transmission resources in the fourth candidate transmission resources are first indexed in descending order of comb index, then in descending order of resource block group index, and finally in descending order of RB set index.

[0483] Furthermore, the first terminal device may determine a fifth candidate transmission resource set from the fourth candidate transmission resource set based on the eighteenth parameter. In this manner, the determined fifth candidate transmission resource set is based on a resource block group granularity.

[0484] It should be noted that the total number of resources included in the fifth candidate transmission resource set can be determined based on one or more of the number of resource block groups included in the fifth candidate transmission resource set, the number of transmission resources that can be code-division multiplexed, the number of RB sets corresponding to the transmission resources of the first PSSCH, and the number of subchannels or the number of comb teeth corresponding to the transmission resources of the first PSSCH.

[0485] The resources in the fifth candidate transmission resource set with resource block group as the granularity can be indexed as follows:

[0486] 1) The transmission resources in the fifth candidate transmission resources are first indexed in ascending order according to the resource block group index, and then indexed in ascending order according to the code domain resource index; or,

[0487] 2) The transmission resources in the fifth candidate transmission resources are first indexed in descending order of resource block group index, and then in descending order of code domain resource index.

[0488] The first terminal device may determine the index corresponding to the first PSFCH transmission resource in the fifth candidate transmission resource set based on the nineteenth parameter. For example, if the nineteenth parameter includes the ninth parameter, the first terminal device may determine the index of the first PSFCH transmission resource in the fifth candidate transmission resource set based on the ninth parameter. Further, the dedicated RB or transmission resource occupied by the first PSFCH may be determined based on the index.

[0489] Mode 3: The fifth transmission resource set is determined with comb teeth as the granularity (i.e., one or more comb teeth that can be used to transmit the first PSFCH are determined from the fourth candidate transmission resource set based on the eighteenth parameter, and one or more comb teeth constitute the fifth candidate transmission resource set).

[0490] When the fifth transmission resource set is determined with a comb-tooth granularity, the indexing method of the resources in the fourth candidate resource set may be:

[0491] 1) The fourth candidate transmission resource set is indexed in order from high to low according to the comb index; or,

[0492] 2) The fourth candidate transmission resource set is indexed in order of comb index from low to high.

[0493] Furthermore, the first terminal device may determine a fifth candidate transmission resource set from the fourth candidate transmission resource set based on the eighteenth parameter. In this manner, the determined fifth candidate transmission resource set is based on a comb tooth granularity.

[0494] It should be noted that the total number of resources included in the fifth candidate transmission resource set can be determined based on one or more of the number of comb teeth included in the fifth candidate transmission resource set, the number of resource block groups included in the comb teeth that can be used for PSFCH transmission, the number of transmission resources that can be code-division multiplexed, the number of RB sets corresponding to the transmission resources of the first PSSCH, and the number of subchannels or the number of comb teeth corresponding to the transmission resources of the first PSSCH.

[0495] The resources in the fifth candidate transmission resource set with the comb teeth as the granularity can be indexed as follows:

[0496] 1) The transmission resources in the fifth candidate transmission resources are first indexed in ascending order according to the comb index, then in ascending order according to the resource block group index, and then in ascending order according to the code domain resource index; or,

[0497] 2) The transmission resources in the fifth candidate transmission resources are first indexed in ascending order of resource block group index, then in ascending order of comb index, and then in ascending order of code domain resource index; or,

[0498] 3) The transmission resources in the fifth candidate transmission resources are first indexed in descending order according to the comb index, then in descending order according to the resource block group index, and then in descending order according to the code domain resource index; or,

[0499] 4) The transmission resources in the fifth candidate transmission resources are first indexed in descending order of resource block group index, then in descending order of comb index, and finally in descending order of code domain resource index.

[0500] The first terminal device may determine the index corresponding to the first PSFCH transmission resource in the fifth candidate transmission resource set based on the nineteenth parameter. For example, if the nineteenth parameter includes the ninth parameter, the first terminal device may determine the index of the first PSFCH transmission resource in the fifth candidate transmission resource set based on the ninth parameter. Further, the dedicated RB or transmission resource occupied by the first PSFCH may be determined based on the index.

[0501] Mode 4: The fifth transmission resource set is determined with resource block group as the granularity (one or more resource block groups that can be used to transmit the first PSFCH are determined from the fourth candidate transmission resource set based on the eighteenth parameter, and one or more resource block groups constitute the fifth candidate transmission resource set).

[0502] When the fifth transmission resource set is determined with resource block groups as the granularity, the indexing method of the resources in the fourth candidate resource set may be:

[0503] 1) The transmission resources in the fourth candidate transmission resources are first indexed in ascending order according to the comb index, and then indexed in ascending order according to the resource block group index; or,

[0504] 2) The transmission resources in the fourth candidate transmission resources are first indexed in ascending order according to the resource block group index, and then indexed in ascending order according to the comb index; or,

[0505] 3) The transmission resources in the fourth candidate transmission resources are first indexed in descending order according to the comb index, and then indexed in descending order according to the resource block group index; or,

[0506] 4) The transmission resources in the fourth candidate transmission resources are first indexed in descending order of the resource block group index and then in descending order of the comb index.

[0507] Furthermore, the first terminal device may determine a fifth candidate transmission resource set from the fourth candidate transmission resource set based on the eighteenth parameter. In this manner, the determined fifth candidate transmission resource set is based on a resource block group granularity.

[0508] It should be noted that the total number of resources included in the fifth candidate transmission resource set can be determined based on one or more of the number of resource block groups included in the fifth candidate transmission resource set, the number of transmission resources that can be code-division multiplexed, the number of RB sets corresponding to the transmission resources of the first PSSCH, and the number of subchannels or the number of comb teeth corresponding to the transmission resources of the first PSSCH.

[0509] The resources in the fifth candidate transmission resource set with resource block group as the granularity can be indexed as follows:

[0510] 1) The transmission resources in the fifth candidate transmission resources are first indexed in ascending order according to the resource block group index, and then in ascending order according to the code domain resource index; or,

[0511] 2) The transmission resources in the fifth candidate transmission resources are first indexed in descending order of resource block group index, and then in descending order of code domain resource index.

[0512] The first terminal device may determine, in the fifth candidate transmission resource set, an index corresponding to the first PSFCH transmission resource based on the nineteenth parameter. For example, if the nineteenth parameter includes the ninth parameter, the index of the first PSFCH transmission resource in the fifth candidate transmission resource set is determined based on the ninth parameter. Further, the dedicated RB or transmission resource occupied by the first PSFCH is determined based on the index.

[0513] Mode 5: The fifth transmission resource set is determined at a granularity of resource block groups (i.e., one or more resource block groups that can be used to transmit the first PSFCH are determined from the fourth candidate transmission resource set based on the eighteenth parameter, and the one or more resource block groups constitute the fifth candidate transmission resource set)

[0514] When the fifth transmission resource set is determined with resource block groups as the granularity, the indexing method of the resources in the fourth candidate resource set may be:

[0515] 1) The transmission resources in the fourth candidate transmission resources are indexed in ascending order of resource block group index; or,

[0516] 2) The transmission resources in the fourth candidate transmission resources are indexed in descending order of resource block group index.

[0517] Furthermore, the first terminal device may determine a fifth candidate transmission resource set from the fourth candidate transmission resource set based on the eighteenth parameter. In this manner, the determined fifth candidate transmission resource set is based on a resource block group granularity.

[0518] It should be noted that the total number of resources included in the fifth candidate transmission resource set can be determined based on one or more of the number of resource block groups included in the fifth candidate transmission resource set, the number of transmission resources that can be code-division multiplexed, the number of RB sets corresponding to the transmission resources of the first PSSCH, and the number of subchannels or the number of comb teeth corresponding to the transmission resources of the first PSSCH.

[0519] The resources in the fifth candidate transmission resource set with resource block group as the granularity can be indexed as follows:

[0520] 1) The transmission resources in the fifth candidate transmission resources are first indexed in ascending order according to the resource block group index, and then in ascending order according to the code domain resource index; or,

[0521] 2) The transmission resources in the fifth candidate transmission resources are first indexed in descending order of resource block group index, and then in descending order of code domain resource index.

[0522] Furthermore, in the fifth candidate transmission resource set, the first terminal device may determine the index corresponding to the first PSFCH transmission resource based on the nineteenth parameter. For example, if the nineteenth parameter includes the ninth parameter, the index of the first PSFCH transmission resource in the fifth candidate transmission resource set is determined based on the ninth parameter.

[0523] The index corresponding to the first PSFCH transmission resource in the third candidate transmission resource set can be determined by the above-mentioned methods 1 to 5. The first terminal device can determine the dedicated RB or transmission resource occupied by the first PSFCH according to the index.

[0524] In some embodiments, the resources for the first PSSCH transmission may correspond to one or more RB sets. The one or more RB sets may include a second RB set. The first terminal device may determine the transmission resources for the first PSFCH within the second RB set. Alternatively, the first terminal device may determine the transmission resources for the first PSFCH based on the second RB set information.

[0525] As a possible implementation, the first terminal device may determine the transmission resource of the first PSFCH in the second RB set based on one or more of the following parameters: index information corresponding to the second RB set; index corresponding to the first subchannel, the first comb tooth, or the first RB of the transmission resource of the first PSSCH in the second RB set; the number of subchannels, the number of comb teeth, or the number of RBs included in the transmission resource of the first PSSCH in the second RB set; the time slot index corresponding to the transmission resource of the first PSSCH; the index of the transmission opportunity corresponding to the first PSFCH; the total number of transmission opportunities corresponding to the first PSFCH; the first identification information. The first identification information may include second identification information and / or third identification information, the second identification information is determined based on the source identification included in the first SCI, the first SCI is used to schedule the first PSSCH, and the third identification information is 0 or the third identification information is determined based on the member identification of the terminal device in the communication group.

[0526] Optionally, the second RB set may be any one of the one or more RB sets corresponding to the resources transmitted by the first PSSCH. For example, the second RB set may be the first RB set or the last RB set among the one or more RB sets. The first terminal device may determine the second RB set or the RB set corresponding to the transmission resources of the first PSFCH based on one or more of the following: protocol predefined information; pre-configuration information; configuration information of the network device; and indication information sent by the target terminal device.

[0527] It should be noted that the target terminal device can be a terminal device that sends the first PSFCH, a terminal device that receives the first PSFCH, a terminal device that sends the first PSSCH, or a terminal device that receives the first PSSCH. Therefore, it can be seen that the target terminal device can be the first terminal device. Alternatively, the target terminal device can be a terminal device that performs sideline communication with the first terminal device.

[0528] In some embodiments, when the resources for the first PSSCH transmission correspond to multiple RB sets, the multiple RB sets may include a third RB set. The third RB set may be any RB set other than the second RB set in the multiple RB sets corresponding to the resources for the first PSSCH transmission.

[0529] In some implementations, the first terminal device can determine the transmission resources of the first PSFCH within the third RB set. That is, the first terminal device can determine the transmission resources of the first PSFCH corresponding to each of the second RB set and the third RB set, and the first PSFCH in each RB set corresponds to the same time domain resources. In the case where the resources for the first PSSCH transmission correspond to multiple RB sets, for each RB set in the multiple RB sets, the transmission resources of the first PSFCH can be determined in the RB set respectively. For example, the resources for the first PSSCH transmission correspond to 4 RB sets, the second RB set is the first RB set among the 4 RB sets, and the third RB set includes the second RB set, the third RB set and the fourth RB set among the 4 RB sets. The first terminal device determines the transmission resources of the first PSFCH in the 4 RB sets respectively.

[0530] After determining the transmission resources of the first PSFCH in each RB set, the first terminal device can simultaneously send the first PSFCH in each RB set.

[0531] The first terminal device can determine the transmission resources of the first PSFCH in the third RB set based on one or more of the following parameters: index information corresponding to the third RB set; the index corresponding to the first subchannel, the index corresponding to the first comb tooth or the index corresponding to the first RB of the transmission resources of the first PSSCH in the third RB set; the number of subchannels, the number of comb teeth or the number of RBs included in the transmission resources of the first PSSCH in the third RB set; the time slot index corresponding to the transmission resources of the first PSSCH; the index of the transmission opportunity corresponding to the first PSFCH; the total number of transmission opportunities corresponding to the first PSFCH; and the first identification information.

[0532] It should be understood that if the first PSSCH includes multiple RB sets, and the transmitting device of the first PSSCH initiates a channel occupancy time (COT) when sending the first PSSCH, and shares it with the transmitting device of the first PSFCH, if the first PSFCH is only located in one RB set, and no PSFCH is sent in other RB sets, then in other RB sets, devices of other systems (such as WiFi systems) may seize the shared spectrum within the time range corresponding to the PSFCH transmission opportunity, thereby causing the subsequent side transmission to be unable to continue. Through the above technical solution, the present application can avoid the situation where no PSFCH is sent in the RB set as much as possible, thereby avoiding the shared spectrum from being occupied by devices of other systems, and thus realizing the normal side transmission.

[0533] Optionally, whether to determine the first PSFCH transmission resources within the third RB set can be determined based on the following information: whether the first terminal device has a PSFCH to be sent within the third RB set. For example, if the first terminal device does not have a PSFCH to be sent within the third RB set, the first terminal device can determine the transmission resources for the first PSFCH within the third RB set. If the first terminal device has a PSFCH to be sent within the third RB set (the PSFCH is sent to the second terminal device or other terminal devices), the first terminal device does not determine the transmission resources for the first PSFCH within the third RB set.

[0534] If there is a PSFCH to be sent in the third RB set, the PSFCH to be sent will occupy the third RB set. Even if the first PSFCH transmission resource is not determined in the third RB set, it can be ensured that the sideline system user continues to occupy the channel.

[0535] In some implementations, the first terminal device may determine transmission resources for a third PSFCH within a third RB set. The transmission resources for the third PSFCH may include common comb teeth in the third RB set. The third PSFCH and the first PSFCH have the same time domain resources.

[0536] As a possible implementation, the transmission resources for the third PSFCH may include only the common comb teeth in the third RB set. It should be understood that since the third PSFCH does not occupy dedicated RBs, in this case, the third PSFCH is a redundant PSFCH. In other words, no valid sidelink feedback information is transmitted on the transmission resources for the third PSFCH.

[0537] For example, the second RB set may be the first RB set among the multiple RB sets corresponding to the first PSSCH transmission resource. The transmission resources of the first PSFCH (including common comb teeth and dedicated RBs) are located in the first RB set among the one or more RB sets corresponding to the first PSSCH transmission resource, and the first terminal device may determine the transmission resources of the third PSFCH (including only common comb teeth) in other RB sets except the first RB set.

[0538] For another example, the second RB set may be one of the multiple RB sets corresponding to the first PSSCH transmission resources. The transmission resources of the first PSFCH (including common comb teeth and dedicated RBs) are located in the one RB set, and the first terminal device may determine the transmission resources of the third PSFCH (including only common comb teeth) in other RB sets except the one RB set.

[0539] It can be understood that when the transmission resources of the third PSFCH only include the common comb teeth in the third RB set, it is not only possible to occupy the frequency domain resources of the third RB set and avoid preemption by equipment of other systems, but also to avoid interference with the PSFCH transmission of other users in the side system.

[0540] As a possible implementation, the transmission resources of the third PSFCH may include the common comb teeth in the third RB set and the dedicated RBs occupied by the third PSFCH. That is, valid feedback information can be transmitted within the transmission resources of the third PSFCH.

[0541] For example, the third PSFCH is also associated with the first PSSCH, that is, the sidelink feedback information carried in the third PSFCH is the sidelink feedback information for the first PSSCH. For the third RB set, the first terminal device can determine the transmission resources of the third PSFCH in the third RB set based on the transmission resources of the first PSSCH in the third RB set. Exemplarily, the transmission resources of the third PSFCH in the third RB set can be determined based on one or more of the following parameters: the index corresponding to the first subchannel, the index corresponding to the first comb tooth, or the index corresponding to the first RB of the transmission resource of the first PSSCH in the third RB set; the number of subchannels, the number of comb teeth, or the number of RBs included in the transmission resource of the first PSSCH in the third RB set; the time slot index corresponding to the transmission resource of the first PSSCH.

[0542] Optionally, whether to determine the third PSFCH transmission resources on the third RB set can be determined based on the following information: whether the first terminal device has a PSFCH to be sent in the third RB set (the PSFCH is sent to the second terminal device or other terminal devices). For example, if the first terminal device does not have a PSFCH to be sent in the third RB set, the first terminal device can determine the transmission resources of the third PSFCH in the third RB set. If the first terminal device has a PSFCH to be sent in the third RB set, the first terminal device does not determine the transmission resources of the third PSFCH in the third RB set.

[0543] If there is a PSFCH to be sent in the third RB set, the PSFCH to be sent will occupy the third RB set. Even if the first PSFCH transmission resource is not determined in the third RB set, it can be ensured that the sideline system user continues to occupy the channel.

[0544] After determining the transmission resources of the third PSFCH, the first terminal device can send the first PSFCH and the third PSFCH.

[0545] The present application is described in detail below with reference to Figure 21. In the example shown in Figure 21, the first terminal device is UE2, the second terminal device is UE1, the second RB set is RB set 0, and the third RB set is RB set 1.

[0546] As shown in Figure 21, UE1 sends the first PSSCH to UE2 in time slot 1. The transmission resources of the first PSSCH are located in RB set 0 and RB set 1. UE1 initiates COT and shares it with UE2. Based on the transmission resources of the first PSSCH, UE2 can determine that the transmission resources of its associated first PSFCH are located in RB set 0. If in the PSFCH transmission opportunity of time slot 4, UE2 does not send PSFCH in RB set 1, and only sends the first PSFCH in RB set 0, then devices of other systems may seize the channel on RB set 1 within the time range corresponding to the PSFCH transmission resources, resulting in the COT shared by UE1 on RB set 1 no longer being used by other users of the sideline system, thereby reducing the transmission efficiency of the SL system. Therefore, in the PSFCH transmission opportunity of time slot 4, UE2 can determine the transmission resources of the third PSFCH in RB set 1, and the third PSFCH can only occupy the common comb teeth in RB set 1. UE2 may send the first PSFCH and the third PSFCH in RB set 0 and RB set 1 respectively, so as to ensure that the sideline system users continuously occupy the channel, thereby preventing other system users from preempting the channel.

[0547] It should be understood that in the above example, if UE2 has a fourth PSFCH to be transmitted in RB set 1 during the PSFCH transmission opportunity in timeslot 4, where the fourth PSFCH is, for example, transmitted by UE2 to UE3, then UE2 does not need to determine the third PSFCH in RB set 1. This is because the fourth PSFCH transmitted by UE2 can also occupy RB set 1, thus ensuring that sideline system users continue to occupy the channel.

[0548] In some embodiments, within the same time domain resources, a PSFCH with a higher priority may be transmitted first. Optionally, the smaller the priority value, the higher the priority of the PSFCH.

[0549] In some embodiments, the priority of the first PSFCH may be determined based on the priority of the first PSSCH associated therewith. For example, the first PSFCH may have the same priority as the first PSSCH.

[0550] In some embodiments, the third PSFCH and the first PSFCH may have the same priority. For example, when the transmission resources of the third PSFCH include dedicated RBs, the third PSFCH and the first PSFCH may have the same priority. In this case, the third PSFCH also transmits HARQ information. Therefore, the priority of the third PSFCH may be determined based on the priority of the first PSSCH associated with it. In other words, the third PSFCH and the first PSFCH may have the same priority.

[0551] In some embodiments, the priority of the third PSFCH may be lower than that of the first PSFCH. For example, when the transmission resources of the third PSFCH include only common comb teeth, the priority of the third PSFCH may be lower than that of the first PSFCH to give priority to transmitting the first PSFCH carrying valid sidelink feedback information.

[0552] In some implementations, the priority of the third PSFCH may be lower than the priority of the PSFCH carrying valid sidelink feedback information. For example, when the transmission resources of the third PSFCH include only common comb teeth, the priority value range of the PSFCH carrying valid sidelink feedback information may be [1, 8], and the priority value of the third PSFCH may be greater than 8. In this implementation, the PSFCH carrying valid sidelink feedback information may be transmitted preferentially, that is, the transmission of the feedback information is prioritized.

[0553] In some implementations, the priority of the third PSFCH may be higher than the priority of some or all PSFCHs carrying valid feedback information. For example, the priority of the PSFCH carrying valid feedback information may be in the range of [1, 8], and the priority of the third PSFCH may be less than or equal to 1. In this implementation, it is possible to prioritize the continuous occupation of the channel by users of the sideline system, that is, to prioritize ensuring that the channel is not preempted by users of other systems.

[0554] In some implementations, the priority value of the third PSFCH may be determined based on one or more of the following: protocol predefined information; preconfigured information; network device configuration information; and indication information sent by the target terminal device. For example, the preconfigured information or network configuration information includes indication information indicating that the priority value of the third PSFCH is 8.

[0555] It should be noted that the target terminal device may be a terminal device that transmits the first PSFCH, a terminal device that receives the first PSFCH, a terminal device that transmits the first PSSCH, or a terminal device that receives the first PSSCH. Therefore, it can be seen that the target terminal device may be the first terminal device. Alternatively, the target terminal device may be a terminal device that performs sideline communication with the first terminal device.

[0556] It should be noted that, in the embodiment of the present application, RB is also referred to as PRB, that is, RB can be equivalent to PRB.

[0557] It should be noted that dedicated RBs are also called dedicated PRBs, that is, dedicated RBs can be equivalent to dedicated PRBs.

[0558] The method embodiments of the present application are described in detail above, and the device embodiments of the present application are described in detail below. It should be understood that the description of the method embodiments corresponds to the description of the device embodiments, so for parts not described in detail, reference can be made to the above method embodiments.

[0559] FIG22 is a schematic structural diagram of a terminal device 2200 provided in an embodiment of the present application. The terminal device 2200 is a first terminal device and may include a determining unit 2210.

[0560] The determining unit is configured to determine the transmission resources of the first PSFCH; wherein the transmission resources of the first PSFCH include one or more of the following: a common comb occupied by the first PSFCH; and a dedicated RB occupied by the first PSFCH.

[0561] In some embodiments, the common comb is determined based on one or more of the following: protocol predefined information; preconfiguration information; configuration information of the network device; and indication information sent by the target terminal device; wherein the target terminal device is a terminal device that sends a first PSFCH, a terminal device that receives a first PSFCH, a terminal device that sends a first physical sidelink shared channel PSSCH, or a terminal device that receives a first PSSCH, and the first PSSCH is associated with the first PSFCH.

[0562] In some embodiments, for a PSFCH transmission opportunity, a dedicated RB occupied by a first PSFCH is determined from a first set of candidate transmission resources.

[0563] In some embodiments, the transmission resources in the first candidate transmission resource set are first indexed in order from low to high according to the available RB set index, then in order from low to high according to the comb index, then in order from low to high according to the resource block group index, and then in order from low to high according to the code domain resource index; or, the transmission resources in the first candidate transmission resource set are first indexed in order from low to high according to the comb index, then in order from low to high according to the resource block group index, then in order from low to high according to the available RB set index, and then in order from low to high according to the code domain resource index; or, the transmission resources in the first candidate transmission resource set are first indexed in order from low to high according to the comb index, then in order from low to high according to the available RB set index, then in order from low to high according to the resource block group index, and then in order from low to high according to the code domain resource index; or, the transmission resources in the first candidate transmission resource set are first indexed in order from low to high according to the comb index, then in order from low to high according to the available RB set index, then in order from low to high according to the resource block group index, and then in order from low to high according to the code domain resource index.

[0564] In some embodiments, the available RB set is determined based on one or more of the following: the RB set corresponding to the transmission resources of the first PSSCH; the RB set included in the resource pool corresponding to the first PSSCH; and whether the transmission opportunity corresponding to the first PSFCH is the first PSFCH transmission opportunity among the N PSFCH transmission opportunities associated with the first PSSCH; wherein, the first PSSCH is associated with the first PSFCH.

[0565] In some embodiments, if the transmission opportunity corresponding to the first PSFCH is the first PSFCH transmission opportunity among N PSFCH transmission opportunities, the available RB set includes the RB set corresponding to the transmission resources of the first PSSCH; and / or if the transmission opportunity corresponding to the first PSFCH is not the first PSFCH transmission opportunity among N PSFCH transmission opportunities, the available RB set includes the RB set included in the resource pool.

[0566] In some embodiments, the frequency domain range of a comb tooth in the first candidate transmission resource set corresponds to the frequency domain range of a comb tooth in an RB set.

[0567] In some embodiments, the comb teeth in the first set of candidate transmission resources do not include common comb teeth.

[0568] In some embodiments, the comb teeth available for PSFCH transmission of different RB sets in the resource pool are configured independently.

[0569] In some embodiments, one resource block group corresponds to K3 RBs in one comb tooth; wherein K3 is equal to the number of dedicated RBs, and K3 is a positive integer greater than or equal to 1.

[0570] In some embodiments, if a comb tooth includes A RBs, the number of resource block groups included in a comb tooth is equal to Where A is a positive integer greater than or equal to 1, It represents the number of combinations formed by selecting K3 elements from A elements.

[0571] In some embodiments, if a comb tooth includes A RBs, the number of resource block groups included in the comb tooth is equal to floor(A / K3); where A is a positive integer greater than or equal to 1, and floor means rounding down.

[0572] In some embodiments, if a comb tooth includes A RBs and K3=1, the number of resource block groups included in a comb tooth is equal to A; where A is a positive integer greater than or equal to 1.

[0573] In some embodiments, if an RB set includes a first comb tooth and a second comb tooth, the number of RBs included in the first comb tooth and the second comb tooth is the same or different.

[0574] In some embodiments, the number of code domain resources is determined based on one or more of the following: the number of cyclic shift pairs that can be code-division multiplexed within an RB; and the number of resources that can be code-division multiplexed between RBs included in a resource block group.

[0575] In some embodiments, the dedicated RB occupied by the first PSFCH is determined from the first candidate transmission resource set based on a first parameter, and the first parameter includes one or more of the following: a second parameter, determined based on the index corresponding to the first subchannel, the index corresponding to the first comb tooth, or the index corresponding to the first RB of the transmission resource of the first PSSCH; a third parameter, determined based on the number of subchannels, the number of comb teeth, or the number of RBs included in the transmission resource of the first PSSCH; a fourth parameter, determined based on the time slot index corresponding to the transmission resource of the first PSSCH; a fifth parameter, determined based on the index of the RB set corresponding to the transmission resource of the first PSSCH; a sixth parameter, determined based on the transmission resource of the first PSSCH. The seventh parameter is determined based on the index of the transmission opportunity corresponding to the first PSFCH; the eighth parameter is determined based on the total number of transmission opportunities corresponding to the first PSFCH; the ninth parameter is determined based on the first identification information, the first identification information includes the second identification information and / or the third identification information, the second identification information is determined based on the source identification included in the first side control information SCI, the first SCI is used to schedule the first PSSCH, the third identification information is 0 or the third identification information is determined based on the member identification of the terminal device in the communication group; and the tenth parameter is determined based on the total number of resources contained in the first candidate transmission resource set; wherein, the first PSSCH is associated with the first PSFCH.

[0576] In some embodiments, the dedicated RB occupied by the first PSFCH is determined from a second set of candidate transmission resources, wherein the second set of candidate transmission resources is determined based on a PSFCH transmission opportunity index.

[0577] In some embodiments, the number of transmission resources included in the second candidate transmission resource set is determined based on one or more of the following: a first number, determined based on the number of first RB sets that can be used for PSFCH transmission; a second number, determined based on the number of comb teeth that can be used for PSFCH transmission contained in an RB in the first RB set; a third number, determined based on the number of resource block groups that can be used for PSFCH transmission contained in a comb tooth in an RB set; and a fourth number, determined based on the number N of PSFCH transmission opportunities.

[0578] In some embodiments, the number of transmission resources included in the second candidate transmission resource set is determined based on the first number and the fourth number.

[0579] In some embodiments, the number L0 of RB sets included in the second candidate transmission resource set satisfies: L0=A / N or L0=floor(A / N); where A represents the first number and floor represents rounding down.

[0580] In some embodiments, the second candidate transmission resource set is determined based on the PSFCH transmission opportunity index, including: one or more RB sets that can be used to transmit the first PSFCH are determined based on the PSFCH transmission opportunity index, and the one or more RB sets constitute the second candidate transmission resource set.

[0581] In some embodiments, the transmission resources in the second candidate transmission resource set are first indexed in order from low to high according to the RB set index, then in order from low to high according to the comb index, then in order from low to high according to the resource block group index, and then in order from low to high according to the code domain resource index; or, the transmission resources in the second candidate transmission resource set are first indexed in order from low to high according to the comb index, then in order from low to high according to the resource block group index, then in order from low to high according to the RB set index, and then in order from low to high according to the code domain resource index; or, the transmission resources in the second candidate transmission resource set are first indexed in order from low to high according to the comb index, then in order from low to high according to the RB set index, then in order from low to high according to the resource block group index, and then in order from low to high according to the code domain resource index; or, the transmission resources in the second candidate transmission resource set are first indexed in order from low to high according to the comb index, then in order from low to high according to the RB set index, then in order from low to high according to the resource block group index, and then in order from low to high according to the code domain resource index.

[0582] In some embodiments, the number of transmission resources included in the second candidate transmission resource set is determined based on the first number, the second number, and the fourth number.

[0583] In some embodiments, the number L1 of comb teeth included in the second candidate transmission resource set satisfies: Among them, A represents the first quantity, B a represents the second quantity, N represents the fourth quantity, floor represents rounding down, a is an integer, and the value range of a is [0, A-1].

[0584] In some embodiments, the second candidate transmission resource set is determined based on the PSFCH transmission opportunity index, including: one or more comb teeth that can be used to transmit the first PSFCH are determined based on the PSFCH transmission opportunity index, and the one or more comb teeth constitute the second candidate transmission resource set.

[0585] In some embodiments, the transmission resources in the second candidate transmission resource set are first indexed in order from low to high according to the comb index, then in order from low to high according to the resource block group index, and then in order from low to high according to the code domain resource index; or, the transmission resources in the second candidate transmission resource set are first indexed in order from low to high according to the resource block group index, then in order from low to high according to the comb index, and then in order from low to high according to the code domain resource index.

[0586] In some embodiments, the number of transmission resources included in the second candidate transmission resource set is determined based on the first number, the second number, the third number, and the fourth number.

[0587] In some embodiments, the number L2 of resource block groups included in the second candidate transmission resource set satisfies: Among them, A represents the first quantity, B a Indicates the second quantity, C a,b Indicates the third quantity, N indicates the fourth quantity, floor indicates rounding down, a and b are both integers, and the value range of a is [0, A-1], and the value range of b is [0, B a -1].

[0588] In some embodiments, the second candidate transmission resource set is determined based on the PSFCH transmission opportunity index, including: one or more RB resource block groups that can be used to transmit the first PSFCH are determined based on the PSFCH transmission opportunity index, and one or more resource block groups constitute the second candidate transmission resource set.

[0589] In some embodiments, the transmission resources in the second candidate transmission resource set are first indexed in ascending order according to the resource block group index and then in ascending order according to the code domain resource index.

[0590] In some embodiments, the dedicated RB occupied by the first PSFCH is determined from the second candidate transmission resource set based on a twenty-first parameter, and the twenty-first parameter includes one or more of the following: a second parameter, determined based on the index corresponding to the first subchannel, the index corresponding to the first comb tooth, or the index corresponding to the first RB of the transmission resource of the first PSSCH; a third parameter, determined based on the number of subchannels, the number of comb teeth, or the number of RBs included in the transmission resource of the first PSSCH; a fourth parameter, determined based on the time slot index corresponding to the transmission resource of the first PSSCH; a fifth parameter, determined based on the index of the RB set corresponding to the transmission resource of the first PSSCH; a sixth parameter, determined based on the first PSSCH The seventh parameter is determined based on the index of the transmission opportunity corresponding to the first PSFCH; the eighth parameter is determined based on the total number of transmission opportunities corresponding to the first PSFCH; the ninth parameter is determined based on the first identification information, the first identification information includes the second identification information and / or the third identification information, the second identification information is determined based on the source identification included in the first SCI, the first SCI is used to schedule the first PSSCH, the third identification information is 0 or the third identification information is determined based on the member identification of the terminal device in the communication group; and the eleventh parameter is determined based on the total number of resources contained in the second candidate transmission resource set; wherein, the first PSSCH is associated with the first PSFCH.

[0591] In some embodiments, the dedicated RB occupied by the first PSFCH is determined from the second candidate transmission resource set based on the twenty-first parameter, including: the dedicated RB occupied by the first PSFCH is determined based on the index corresponding to the transmission resource of the first PSFCH, and the index is determined from the second candidate transmission resource set based on the twenty-first parameter.

[0592] In some embodiments, the dedicated RB occupied by the first PSFCH is determined from a third candidate transmission resource set, and the third candidate transmission resource set is determined from the second candidate transmission resource set.

[0593] In some embodiments, the third candidate transmission resource set is determined from the second candidate transmission resource set based on a twelfth parameter, and the twelfth parameter includes one or more of the following: a second parameter, determined based on the index corresponding to the first subchannel, the index corresponding to the first comb tooth, or the index corresponding to the first RB of the transmission resource of the first PSSCH; a third parameter, determined based on the number of subchannels, the number of comb teeth, or the number of RBs included in the transmission resource of the first PSSCH; a fourth parameter, determined based on the time slot index corresponding to the transmission resource of the first PSSCH; a fifth parameter, determined based on the index of the RB set corresponding to the transmission resource of the first PSSCH; a sixth parameter, determined based on the number of RB sets corresponding to the transmission resource of the first PSSCH; and an eleventh parameter, determined based on the total number of resources included in the second candidate transmission resource set.

[0594] In some embodiments, the dedicated RB occupied by the first PSFCH is determined from the third candidate transmission resource set based on a thirteenth parameter, and the thirteenth parameter includes one or more of the following: a third parameter, determined based on the number of subchannels, the number of comb teeth or the number of RBs included in the transmission resources of the first PSSCH; a fifth parameter, determined based on the index of the RB set corresponding to the transmission resources of the first PSSCH; a sixth parameter, determined based on the number of RB sets corresponding to the transmission resources of the first PSSCH; a ninth parameter, determined based on the first identification information, the first identification information includes the second identification information and / or the third identification information, the second identification information is determined based on the source identification included in the first SCI, the first SCI is used to schedule the first PSSCH, the third identification information is 0 or the third identification information is determined based on the member identification of the terminal device in the communication group; and a fourteenth parameter, determined based on the total number of resources included in the third candidate transmission resource set.

[0595] In some embodiments, the second candidate transmission resource set is determined based on the PSFCH transmission opportunity index, including: one or more RB sets that can be used to transmit the first PSFCH are determined based on the PSFCH transmission opportunity index, and one or more RB sets constitute the second candidate transmission resource set; the third candidate transmission resource set is determined from the second candidate transmission resource set based on the twelfth parameter, including: one or more comb teeth that can be used to transmit the first PSFCH are determined from the second candidate transmission resource set based on the twelfth parameter, and one or more comb teeth constitute the third candidate transmission resource set.

[0596] In some embodiments, the transmission resources in the second candidate transmission resources are first indexed in order from low to high according to the RB set index, and then in order from low to high according to the comb index; or, the transmission resources in the second candidate transmission resources are first indexed in order from low to high according to the comb index, and then in order from low to high according to the RB set index.

[0597] In some embodiments, the transmission resources in the third candidate transmission resources are first indexed in order from low to high according to the comb index, then in order from low to high according to the resource block group index, and then in order from low to high according to the code domain resource index; or, the transmission resources in the third candidate transmission resources are first indexed in order from low to high according to the resource block group index, then in order from low to high according to the comb index, and then in order from low to high according to the code domain resource index.

[0598] In some embodiments, the second candidate transmission resource set is determined based on the PSFCH transmission opportunity index, including: one or more RB sets that can be used to transmit the first PSFCH are determined based on the PSFCH transmission opportunity index, and one or more RB sets constitute the second candidate transmission resource set; the third candidate transmission resource set is determined from the second candidate transmission resource set based on the twelfth parameter, including: one or more resource block groups that can be used to transmit the first PSFCH are determined from the second candidate transmission resource set based on the twelfth parameter, and one or more resource block groups constitute the third candidate transmission resource set.

[0599] In some embodiments, the transmission resources in the second candidate transmission resources are first indexed in the order of RB set index from low to high, then in the order of comb index from low to high, and then in the order of resource block group index from low to high; or, the transmission resources in the second candidate transmission resources are first indexed in the order of resource block group index from low to high, then in the order of comb index from low to high, and then in the order of RB set index from low to high; or, the transmission resources in the second candidate transmission resources are first indexed in the order of comb index from low to high, then in the order of RB set index from low to high, and then in the order of resource block group index from low to high; or, the transmission resources in the second candidate transmission resources are first indexed in the order of comb index from low to high, then in the order of RB set index from low to high, and then in the order of resource block group index from low to high.

[0600] In some embodiments, the transmission resources in the third candidate transmission resources are first indexed in ascending order according to the resource block group index, and then in ascending order according to the code domain resource index.

[0601] In some embodiments, the second candidate transmission resource set is determined based on the PSFCH transmission opportunity index, including: one or more comb teeth that can be used to transmit the first PSFCH are determined based on the PSFCH transmission opportunity index, and one or more comb teeth constitute the second candidate transmission resource set; the third candidate transmission resource set is determined from the second candidate transmission resource set based on the twelfth parameter, including: one or more comb teeth that can be used to transmit the first PSFCH are determined from the second candidate transmission resource set based on the twelfth parameter, and one or more comb teeth constitute the third candidate transmission resource set.

[0602] In some embodiments, the second candidate transmission resource set is indexed in order of comb index from low to high.

[0603] In some embodiments, the transmission resources in the third candidate transmission resources are first indexed in order from low to high according to the comb index, then in order from low to high according to the resource block group index, and then in order from low to high according to the code domain resource index; or, the transmission resources in the third candidate transmission resources are first indexed in order from low to high according to the resource block group index, then in order from low to high according to the comb index, and then in order from low to high according to the code domain resource index.

[0604] In some embodiments, the second candidate transmission resource set is determined based on the PSFCH transmission opportunity index, including: one or more comb teeth that can be used to transmit the first PSFCH are determined based on the PSFCH transmission opportunity index, and one or more comb teeth constitute the second candidate transmission resource set; the third candidate transmission resource set is determined from the second candidate transmission resource set based on the twelfth parameter, including: one or more resource block groups that can be used to transmit the first PSFCH are determined from the second candidate transmission resource set based on the twelfth parameter, and one or more resource block groups constitute the third candidate transmission resource set.

[0605] In some embodiments, the transmission resources in the second candidate transmission resources are first indexed in order from low to high according to the comb index, and then in order from low to high according to the resource block group index; or, the transmission resources in the second candidate transmission resources are first indexed in order from low to high according to the resource block group index, and then in order from low to high according to the comb index.

[0606] In some embodiments, the transmission resources in the third candidate transmission resources are first indexed in ascending order according to the resource block group index, and then in ascending order according to the code domain resource index.

[0607] In some embodiments, the second candidate transmission resource set is determined based on the PSFCH transmission opportunity index, including: one or more resource block groups that can be used to transmit the first PSFCH are determined based on the PSFCH transmission opportunity index, and one or more resource block groups constitute the second candidate transmission resource set; the third candidate transmission resource set is determined from the second candidate transmission resource set based on the twelfth parameter, including: one or more resource block groups that can be used to transmit the first PSFCH are determined from the second candidate transmission resource set based on the twelfth parameter, and one or more resource block groups constitute the third candidate transmission resource set.

[0608] In some embodiments, the transmission resources in the second candidate transmission resources are indexed in order of resource block group index from low to high.

[0609] In some embodiments, the transmission resources in the third candidate transmission resources are first indexed in ascending order according to the resource block group index, and then in ascending order according to the code domain resource index.

[0610] In some embodiments, the dedicated RB occupied by the first PSFCH is determined from the third candidate transmission resource set based on the thirteenth parameter, including: the dedicated RB occupied by the first PSFCH is determined based on the index corresponding to the transmission resource of the first PSFCH, and the index is determined from the third candidate transmission resource set based on the thirteenth parameter.

[0611] In some embodiments, the dedicated RB occupied by the first PSFCH is determined from a fourth candidate transmission resource set, and the fourth candidate transmission resource set is determined based on a fifteenth parameter, and the fifteenth parameter includes one or more of the following: a second parameter, determined based on an index corresponding to the first subchannel, an index corresponding to the first comb tooth, or an index corresponding to the first RB of the transmission resource of the first PSSCH; a third parameter, determined based on the number of subchannels, the number of comb teeth, or the number of RBs included in the transmission resource of the first PSSCH; a fourth parameter, determined based on the time slot index corresponding to the transmission resource of the first PSSCH; a fifth parameter, determined based on the index of the RB set corresponding to the transmission resource of the first PSSCH; and a sixth parameter, determined based on the number of RB sets corresponding to the transmission resource of the first PSSCH; wherein the first PSSCH is associated with the first PSFCH.

[0612] In some embodiments, the fourth candidate transmission resource set is determined based on the fifteenth parameter, including: one or more RB sets that can be used to transmit the first PSFCH are determined based on the fifteenth parameter, and the one or more RB sets constitute the fourth candidate transmission resource set.

[0613] In some embodiments, the transmission resources in the fourth candidate transmission resource set are first indexed in order from low to high according to the RB set index, then in order from low to high according to the comb index, then in order from low to high according to the resource block group index, and then in order from low to high according to the code domain resource index; or, the transmission resources in the fourth candidate transmission resource set are first indexed in order from low to high according to the comb index, then in order from low to high according to the resource block group index, then in order from low to high according to the RB set index, and then in order from low to high according to the code domain resource index; or, the transmission resources in the fourth candidate transmission resource set are first indexed in order from low to high according to the comb index, then in order from low to high according to the RB set index, then in order from low to high according to the resource block group index, and then in order from low to high according to the code domain resource index; or, the transmission resources in the fourth candidate transmission resource set are first indexed in order from low to high according to the comb index, then in order from low to high according to the RB set index, then in order from low to high according to the resource block group index, and then in order from low to high according to the code domain resource index.

[0614] In some embodiments, the fourth candidate transmission resource set is determined based on the fifteenth parameter, including: one or more comb teeth that can be used to transmit the first PSFCH are determined based on the fifteenth parameter, and the one or more comb teeth constitute the fourth candidate transmission resource set.

[0615] In some embodiments, the transmission resources in the fourth candidate transmission resource set are first indexed in order from low to high according to the comb index, then in order from low to high according to the resource block group index, and then in order from low to high according to the code domain resource index; or, the transmission resources in the fourth candidate transmission resource set are first indexed in order from low to high according to the resource block group index, then in order from low to high according to the comb index, and then in order from low to high according to the code domain resource index.

[0616] In some embodiments, the fourth candidate transmission resource set is determined based on the fifteenth parameter, including: one or more resource block groups that can be used to transmit the first PSFCH are determined based on the fifteenth parameter, and the one or more resource block groups constitute the fourth candidate transmission resource set.

[0617] In some embodiments, the transmission resources in the fourth candidate transmission resource set are first indexed in an ascending order of resource block group index and then in an ascending order of code domain resource index.

[0618] In some embodiments, the dedicated RB occupied by the first PSFCH is determined from the fourth candidate transmission resource set based on a sixteenth parameter, and the sixteenth parameter includes one or more of the following: a third parameter, determined based on the number of subchannels, the number of comb teeth or the number of RBs included in the transmission resources of the first PSSCH; a fifth parameter, determined based on the index of the RB set corresponding to the transmission resources of the first PSSCH; a sixth parameter, determined based on the number of RB sets corresponding to the transmission resources of the first PSSCH; a seventh parameter, determined based on the index of the transmission opportunity corresponding to the first PSFCH; an eighth parameter, determined based on the total number of transmission opportunities corresponding to the first PSFCH; a ninth parameter, determined based on the first identification information, the first identification information includes the second identification information and / or the third identification information, the second identification information is determined based on the source identification included in the first SCI, the first SCI is used to schedule the first PSSCH, the third identification information is 0 or the third identification information is determined based on the member identification of the terminal device in the communication group; and a seventeenth parameter, determined based on the total number of resources of the fourth candidate transmission resource set; wherein, the first PSSCH is associated with the first PSFCH.

[0619] In some embodiments, the dedicated RB occupied by the first PSFCH is determined from the fourth candidate transmission resource set based on the sixteenth parameter, including: determining the index corresponding to the transmission resource of the first PSFCH from the fourth candidate transmission resource set based on the sixteenth parameter, and determining the dedicated RB occupied by the first PSFCH based on the index.

[0620] In some embodiments, the dedicated RB occupied by the first PSFCH is determined from the fifth candidate transmission resource set, and the fifth candidate transmission resource set is determined from the fourth candidate transmission resource set.

[0621] In some embodiments, the fifth candidate transmission resource set is determined from the fourth candidate transmission resource set based on an eighteenth parameter, and the eighteenth parameter includes one or more of the following: the seventh parameter, which is determined based on the index of the transmission opportunity corresponding to the first PSFCH; the eighth parameter, which is determined based on the total number of transmission opportunities corresponding to the first PSFCH; and the seventeenth parameter, which is determined based on the total number of resources in the fourth candidate transmission resource set.

[0622] In some embodiments, the dedicated RB occupied by the first PSFCH is determined from the fifth candidate transmission resource set based on a nineteenth parameter, and the nineteenth parameter includes one or more of the following: a third parameter, determined based on the number of subchannels, the number of comb teeth or the number of RBs included in the transmission resources of the first PSSCH; a fifth parameter, determined based on the index of the RB set corresponding to the transmission resources of the first PSSCH; a sixth parameter, determined based on the number of RB sets corresponding to the transmission resources of the first PSSCH; a ninth parameter, determined based on the first identification information, the first identification information includes the second identification information and / or the third identification information, the second identification information is determined based on the source identification included in the first SCI, the first SCI is used to schedule the first PSSCH, the third identification information is 0 or the third identification information is determined based on the member identification of the terminal device in the communication group; and a twentieth parameter, determined based on the total number of resources in the fifth candidate transmission resource set.

[0623] In some embodiments, the fourth candidate transmission resource set is determined based on the fifteenth parameter, including: one or more RB sets that can be used to transmit the first PSFCH are determined based on the fifteenth parameter, and the one or more RB sets constitute the fourth candidate transmission resource set; the fifth candidate transmission resource set is determined from the fourth candidate transmission resource set based on the eighteenth parameter, including: one or more comb teeth that can be used to transmit the first PSFCH are determined from the fourth candidate transmission resource set based on the eighteenth parameter, and the one or more comb teeth constitute the fifth candidate transmission resource set.

[0624] In some embodiments, the transmission resources in the fourth candidate transmission resources are first indexed in order from low to high according to the RB set index, and then in order from low to high according to the comb index; or, the transmission resources in the fourth candidate transmission resources are first indexed in order from low to high according to the comb index, and then in order from low to high according to the RB set index.

[0625] In some embodiments, the transmission resources in the fifth candidate transmission resources are first indexed in order from low to high according to the comb index, then in order from low to high according to the resource block group index, and then in order from low to high according to the code domain resource index; or, the transmission resources in the fifth candidate transmission resources are first indexed in order from low to high according to the resource block group index, then in order from low to high according to the comb index, and then in order from low to high according to the code domain resource index.

[0626] In some embodiments, the fourth candidate transmission resource set is determined based on the fifteenth parameter, including: one or more RB sets that can be used to transmit the first PSFCH are determined based on the fifteenth parameter, and the one or more RB sets constitute the fourth candidate transmission resource set; the fifth candidate transmission resource set is determined from the fourth candidate transmission resource set based on the eighteenth parameter, including: one or more resource block groups that can be used to transmit the first PSFCH are determined from the fourth candidate transmission resource set based on the eighteenth parameter, and the one or more resource block groups constitute the fifth candidate transmission resource set.

[0627] In some embodiments, the transmission resources in the fourth candidate transmission resources are first indexed in the order of RB set index from low to high, then in the order of comb index from low to high, and then in the order of resource block group index from low to high; or, the transmission resources in the fourth candidate transmission resources are first indexed in the order of resource block group index from low to high, then in the order of comb index from low to high, and then in the order of RB set index from low to high; or, the transmission resources in the fourth candidate transmission resources are first indexed in the order of comb index from low to high, then in the order of RB set index from low to high, and then in the order of resource block group index from low to high; or, the transmission resources in the fourth candidate transmission resources are first indexed in the order of comb index from low to high, then in the order of RB set index from low to high, and then in the order of resource block group index from low to high.

[0628] In some embodiments, the transmission resources in the fifth candidate transmission resources are first indexed in ascending order according to the resource block group index, and then in ascending order according to the code domain resource index.

[0629] In some embodiments, the fourth candidate transmission resource set is determined based on the fifteenth parameter, including: one or more comb teeth that can be used to transmit the first PSFCH are determined based on the fifteenth parameter, and one or more comb teeth constitute the fourth candidate transmission resource set; the fifth candidate transmission resource set is determined from the fourth candidate transmission resource set based on the eighteenth parameter, including: one or more comb teeth that can be used to transmit the first PSFCH are determined from the fourth candidate transmission resource set based on the eighteenth parameter, and one or more comb teeth constitute the fifth candidate transmission resource set.

[0630] In some embodiments, the transmission resources in the fourth candidate transmission resources are indexed in order of comb index from low to high.

[0631] In some embodiments, the transmission resources in the fifth candidate transmission resources are first indexed in order from low to high according to the comb index, then in order from low to high according to the resource block group index, and then in order from low to high according to the code domain resource index; or, the transmission resources in the fifth candidate transmission resources are first indexed in order from low to high according to the resource block group index, then in order from low to high according to the comb index, and then in order from low to high according to the code domain resource index.

[0632] In some embodiments, the fourth candidate transmission resource set is determined based on the fifteenth parameter, including: one or more comb teeth that can be used to transmit the first PSFCH are determined based on the fifteenth parameter, and the one or more comb teeth constitute the fourth candidate transmission resource set; the fifth candidate transmission resource set is determined from the fourth candidate transmission resource set based on the eighteenth parameter, including: one or more resource block groups that can be used to transmit the first PSFCH are determined from the fourth candidate transmission resource set based on the eighteenth parameter, and the one or more resource block groups constitute the fifth candidate transmission resource set.

[0633] In some embodiments, the transmission resources in the fourth candidate transmission resources are first indexed in order from low to high according to the comb index, and then indexed in order from low to high according to the resource block group index; or,

[0634] The transmission resources in the fourth candidate transmission resources are first indexed in ascending order according to the resource block group index, and then in ascending order according to the comb index.

[0635] In some embodiments, the transmission resources in the fifth candidate transmission resources are first indexed in ascending order according to the resource block group index, and then in ascending order according to the code domain resource index.

[0636] In some embodiments, the fourth candidate transmission resource set is determined based on the fifteenth parameter, including: one or more resource block groups that can be used to transmit the first PSFCH are determined based on the fifteenth parameter, and one or more resource block groups constitute the fourth candidate transmission resource set; the fifth candidate transmission resource set is determined from the fourth candidate transmission resource set based on the eighteenth parameter, including: one or more resource block groups that can be used to transmit the first PSFCH are determined from the fourth candidate transmission resource set based on the eighteenth parameter, and one or more resource block groups constitute the fifth candidate transmission resource set.

[0637] In some embodiments, the transmission resources in the fourth candidate transmission resources are indexed in order of resource block group index from low to high.

[0638] In some embodiments, the transmission resources in the fifth candidate transmission resources are first indexed in ascending order according to the resource block group index, and then in ascending order according to the code domain resource index.

[0639] In some embodiments, the transmission resources occupied by the first PSFCH are determined from the fifth candidate transmission resource set based on the nineteenth parameter, including: determining the index corresponding to the transmission resource of the first PSFCH from the fifth candidate transmission resource set based on the nineteenth parameter, and determining the dedicated RB occupied by the first PSFCH based on the index.

[0640] In some embodiments, when the first terminal device determines the transmission resources of the second PSFCH, if the transmission resources of the first PSFCH and the transmission resources of the second PSFCH are located in the same RB set, the transmission resources of the first PSFCH and the transmission resources of the second PSFCH include the same common comb teeth.

[0641] In some embodiments, the first PSSCH is associated with the first PSFCH, the transmission resources of the first PSSCH include a second RB set, and the determination unit is used to: determine the transmission resources of the first PSFCH within the second RB set; wherein the first PSSCH is associated with the first PSFCH.

[0642] In some embodiments, determining the transmission resources of the first PSFCH within the second RB set includes: determining the transmission resources of the first PSFCH within the second RB set based on one or more of the following parameters: index information corresponding to the second RB set; the index corresponding to the first subchannel, the index corresponding to the first comb tooth, or the index corresponding to the first RB of the transmission resource of the first PSSCH in the second RB set; the number of subchannels, the number of comb teeth, or the number of RBs included in the transmission resources of the first PSSCH in the second RB set; the time slot index corresponding to the transmission resource of the first PSSCH; the index of the transmission opportunity corresponding to the first PSFCH; the total number of transmission opportunities corresponding to the first PSFCH; first identification information; wherein, the first identification information includes second identification information and / or third identification information, the second identification information is determined based on the source identification included in the first side control information SCI, the first SCI is used to schedule the first PSSCH, and the third identification information is 0 or the third identification information is determined based on the member identification of the terminal device in the communication group.

[0643] In some embodiments, the second RB set is the first RB set among one or more RB sets corresponding to the transmission resources of the first PSSCH.

[0644] In some embodiments, the transmission resources of the first PSSCH further include a third RB set, and the determining unit is configured to determine the transmission resources of the first PSFCH within the third RB set.

[0645] In some embodiments, determining the transmission resources of the first PSFCH within the third RB set includes: if the first terminal device has no PSFCH to be sent within the third RB set within the time domain resources corresponding to the first PSFCH transmission resources, determining the transmission resources of the first PSFCH within the third RB set.

[0646] In some embodiments, if the transmission resources of the first PSSCH correspond to multiple RB sets, the first terminal device determines the transmission resources of the first PSFCH respectively in the multiple RB sets.

[0647] In some embodiments, the transmission resources of the first PSSCH also include a third RB set, and the terminal device is further used to: determine the transmission resources of the third PSFCH within the third RB set; wherein the transmission resources of the third PSFCH include the common comb teeth in the third RB set, and the time domain resources of the third PSFCH and the first PSFCH are the same.

[0648] In some embodiments, determining the transmission resources of the third PSFCH within the third RB set includes: if the first terminal device has no PSFCH to be sent within the third RB set within the time domain resources corresponding to the first PSFCH transmission resources, determining the transmission resources of the third PSFCH within the third RB set.

[0649] In some embodiments, the terminal device is further used to: send the first PSFCH and the third PSFCH.

[0650] In an optional embodiment, the determining unit 2210 may be a processor 2310. The terminal device 2200 may further include a memory 2320 and a transceiver 2330, as specifically shown in FIG23 .

[0651] Figure 23 is a schematic block diagram of a communication device according to an embodiment of the present application. The dashed lines in Figure 23 indicate that the unit or module is optional. Device 2300 may be used to implement the method described in the above method embodiment. Device 2300 may be a chip, a terminal device, or a network device.

[0652] The device 2300 may include one or more processors 2310. The processor 2310 may support the device 2300 to implement the method described in the method embodiment above. The processor 2310 may be a general-purpose processor or a special-purpose processor. For example, the processor may be a central processing unit (CPU). Alternatively, the processor may be another general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc. The general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

[0653] The apparatus 2300 may further include one or more memories 2320. The memories 2320 store programs that can be executed by the processor 2310, causing the processor 2310 to perform the methods described in the above method embodiments. The memories 2320 may be independent of the processor 2310 or integrated into the processor 2310.

[0654] The apparatus 2300 may further include a transceiver 2330. The processor 2310 may communicate with other devices or chips via the transceiver 2330. For example, the processor 2310 may transmit and receive data with other devices or chips via the transceiver 2330.

[0655] The present invention also provides a computer-readable storage medium for storing a program. The computer-readable storage medium can be applied to a terminal device provided in the present invention, and the program enables a computer to execute the method performed by the terminal device in each embodiment of the present invention.

[0656] The present application also provides a computer program product. The computer program product includes a program. The computer program product can be applied to the terminal device provided in the present application, and the program causes a computer to execute the method performed by the terminal device in each embodiment of the present application.

[0657] The embodiments of the present application also provide a computer program. The computer program can be applied to the terminal provided in the embodiments of the present application, and the computer program enables a computer to execute the method executed by the terminal device in each embodiment of the present application.

[0658] It should be understood that the terms "system" and "network" in this application can be used interchangeably. In addition, the terms used in this application are only used to explain the specific embodiments of this application and are not intended to limit this application. The terms "first", "second", "third", and "fourth" in the specification and claims of this application and the accompanying drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0659] In the embodiments of this application, the term "indication" may refer to a direct indication, an indirect indication, or an indication of an association. For example, "A indicates B" may refer to a direct indication of B, e.g., B can obtain information through A; it may refer to an indirect indication of B, e.g., A indicates C, e.g., B can obtain information through C; or it may refer to an association between A and B.

[0660] In the embodiment of the present application, "B corresponding to A" means that B is associated with A and B can be determined based on A. However, it should be understood that determining B based on A does not mean determining B based solely on A, but B can also be determined based on A and / or other information.

[0661] In the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship between indication and indication, configuration and configuration, etc.

[0662] In the embodiments of the present application, "pre-definition" or "pre-configuration" may be implemented by pre-storing corresponding codes, tables, or other methods that can be used to indicate relevant information in a device (e.g., a terminal device and a network device). The present application does not limit the specific implementation method. For example, pre-definition may refer to information defined in a protocol.

[0663] In the embodiments of the present application, the “protocol” may refer to a standard protocol in the communications field, for example, it may include an LTE protocol, an NR protocol, and related protocols used in future communication systems, and the present application does not limit this.

[0664] In the embodiments of this application, the term "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0665] In the embodiments of this application, the term "include" can refer to direct inclusion or indirect inclusion. Alternatively, the term "include" in the embodiments of this application can be replaced with "indicates" or "is used to determine." For example, "A includes B" can be replaced with "A indicates B" or "A is used to determine B."

[0666] In various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0667] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0668] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0669] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0670] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be read by a computer or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital versatile disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0671] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A method for side transmission, characterized in that include: The first terminal device determines a transmission resource of a first physical sideline feedback channel PSFCH; The transmission resource of the first PSFCH includes one or more of the following: The common comb teeth occupied by the first PSFCH; and The first PSFCH occupies a dedicated resource block RB.

2. The method according to claim 1, characterized in that The common comb teeth are determined based on one or more of the following: Protocol predefined information; Pre-configuration information; Configuration information of network devices; and Instruction information sent by the target terminal device; Among them, the target terminal device is a terminal device that sends the first PSFCH, a terminal device that receives the first PSFCH, a terminal device that sends a first physical sideline shared channel PSSCH, or a terminal device that receives the first PSSCH, and the first PSSCH is associated with the first PSFCH.

3. The method according to claim 1 or 2, characterized in that: For a PSFCH transmission opportunity, the dedicated RB occupied by the first PSFCH is determined from a first candidate transmission resource set.

4. The method according to claim 3, characterized in that The transmission resources in the first candidate transmission resource set are first indexed in order of available RB set index from low to high, then in order of comb index from low to high, then in order of resource block group index from low to high, and then in order of code domain resource index from low to high; or, The transmission resources in the first candidate transmission resource set are first indexed in the order of comb index from low to high, then in the order of resource block group index from low to high, then in the order of available RB set index from low to high, and then in the order of code domain resource index from low to high; or, The transmission resources in the first candidate transmission resource set are first indexed in the order of comb tooth index from low to high, then in the order of available RB set index from low to high, then in the order of resource block group index from low to high, and then in the order of code domain resource index from low to high; or, The transmission resources in the first candidate transmission resource set are first indexed in order from low to high according to the resource block group index, then in order from low to high according to the comb tooth index, then in order from low to high according to the available RB set index, and then in order from low to high according to the code domain resource index.

5. The method according to claim 4, characterized in that The available RB set is determined based on one or more of the following: A set of RBs corresponding to the transmission resources of the first PSSCH; a set of RBs included in the resource pool corresponding to the first PSSCH; and Whether the transmission opportunity corresponding to the first PSFCH is the first PSFCH transmission opportunity among the N PSFCH transmission opportunities associated with the first PSSCH; The first PSSCH is associated with the first PSFCH.

6. The method according to claim 5, characterized in that If the transmission opportunity corresponding to the first PSFCH is the first PSFCH transmission opportunity among the N PSFCH transmission opportunities, the available RB set includes the RB set corresponding to the transmission resource of the first PSSCH; and / or If the transmission opportunity corresponding to the first PSFCH is not the first PSFCH transmission opportunity among the N PSFCH transmission opportunities, the available RB set includes the RB set included in the resource pool.

7. The method according to any one of claims 4 to 6, characterized in that The frequency domain range of a comb tooth in the first candidate transmission resource set corresponds to the frequency domain range of a comb tooth in an RB set.

8. The method according to any one of claims 4 to 7, characterized in that The comb teeth in the first candidate transmission resource set do not include the common comb teeth.

9. The method according to any one of claims 4 to 8, characterized in that The comb teeth that can be used for PSFCH transmission in different RB sets in the resource pool are configured independently.

10. The method according to any one of claims 4 to 9, characterized in that One resource block group corresponds to K3 RBs in one comb tooth; wherein K3 is equal to the number of the dedicated RBs, and K3 is a positive integer greater than or equal to 1.

11. The method according to claim 10, characterized in that If a comb tooth includes A RBs, the number of resource block groups contained in the comb tooth is equal to Where A is a positive integer greater than or equal to 1, It represents the number of combinations formed by selecting K3 elements from A elements.

12. The method according to claim 10, characterized in that If a comb tooth includes A RBs, the number of resource block groups included in the comb tooth is equal to floor(A / K3); wherein A is a positive integer greater than or equal to 1, and floor means rounding down.

13. The method according to claim 10, characterized in that If one comb tooth includes A RBs, and K3=1, then the number of resource block groups included in the one comb tooth is equal to A; wherein A is a positive integer greater than or equal to 1.

14. The method according to any one of claims 4 to 13, characterized in that If an RB set includes a first comb tooth and a second comb tooth, the number of RBs included in the first comb tooth and the number of RBs included in the second comb tooth are the same or different.

15. The method according to any one of claims 4 to 14, characterized in that The number of code domain resources is determined based on one or more of the following: The number of cyclic shift pairs that can be code-division multiplexed within one RB; and The number of resources that can be code-division multiplexed between RBs included in a resource block group.

16. The method according to any one of claims 3 to 15, characterized in that The dedicated RB occupied by the first PSFCH is determined from the first candidate transmission resource set based on a first parameter, where the first parameter includes one or more of the following: The second parameter is determined based on an index corresponding to a first subchannel of a transmission resource of the first PSSCH, an index corresponding to a first comb tooth, or an index corresponding to a first RB; The third parameter is determined based on the number of subchannels, the number of comb teeth, or the number of RBs included in the transmission resources of the first PSSCH; A fourth parameter is determined based on a time slot index corresponding to a transmission resource of the first PSSCH; A fifth parameter is determined based on an index of an RB set corresponding to the transmission resource of the first PSSCH; A sixth parameter is determined based on the number of RB sets corresponding to the transmission resources of the first PSSCH; A seventh parameter is determined based on an index of a transmission opportunity corresponding to the first PSFCH; An eighth parameter is determined based on the total number of transmission opportunities corresponding to the first PSFCH; A ninth parameter is determined based on the first identification information, where the first identification information includes second identification information and / or third identification information, where the second identification information is determined based on a source identifier included in the first sideline control information SCI, where the first SCI is used to schedule a first PSSCH, and the third identification information is 0 or the third identification information is determined based on a member identifier of the terminal device in the communication group; as well as a tenth parameter, determined based on the total number of resources included in the first candidate transmission resource set; The first PSSCH is associated with the first PSFCH.

17. The method according to claim 1 or 2, characterized in that: The dedicated RB occupied by the first PSFCH is determined from a second candidate transmission resource set, wherein the second candidate transmission resource set is determined based on a PSFCH transmission opportunity index.

18. The method according to claim 17, characterized in that The number of transmission resources included in the second candidate transmission resource set is determined based on one or more of the following: A first number is determined based on the number of first RB sets available for PSFCH transmission; The second number is determined based on the number of comb teeth that can be used for PSFCH transmission and included in an RB in the first RB set; The third number is determined based on the number of resource block groups that can be used for PSFCH transmission and are included in one comb tooth in the one RB set; as well as The fourth number is determined based on the number N of PSFCH transmission opportunities.

19. The method according to claim 18, characterized in that The number of transmission resources included in the second candidate transmission resource set is determined based on the first number and the fourth number.

20. The method according to claim 18 or 19, characterized in that The number L0 of RB sets included in the second candidate transmission resource set satisfies: L0=A / N or L0=floor(A / N); wherein A represents the first number and floor represents rounding down.

21. The method according to any one of claims 17 to 20, characterized in that The second candidate transmission resource set is determined based on the PSFCH transmission opportunity index, including: One or more RB sets that can be used to transmit the first PSFCH are determined based on the PSFCH transmission opportunity index, and the one or more RB sets constitute the second candidate transmission resource set.

22. The method according to claim 21, characterized in that The transmission resources in the second candidate transmission resource set are first indexed in order of RB set index from low to high, then in order of comb index from low to high, then in order of resource block group index from low to high, and then in order of code domain resource index from low to high; or, The transmission resources in the second candidate transmission resource set are first indexed in an ascending order of comb tooth index, then in an ascending order of resource block group index, then in an ascending order of RB set index, and then in an ascending order of code domain resource index; or, The transmission resources in the second candidate transmission resource set are first indexed in an ascending order of comb tooth index, then in an ascending order of RB set index, then in an ascending order of resource block group index, and then in an ascending order of code domain resource index; or, The transmission resources in the second candidate transmission resource set are first indexed in order from low to high according to the resource block group index, then in order from low to high according to the comb index, then in order from low to high according to the RB set index, and then in order from low to high according to the code domain resource index.

23. The method according to claim 18, characterized in that The number of transmission resources included in the second candidate transmission resource set is determined based on the first number, the second number, and the fourth number.

24. The method according to claim 18 or 23, characterized in that The number of comb teeth L1 included in the second candidate transmission resource set satisfies: Wherein, A represents the first quantity, B a represents the second quantity, N represents the fourth quantity, floor represents rounding down, a is an integer, and the value range of a is [0, A-1].

25. The method according to claim 17, 18, 23 or 24, characterized in that The second candidate transmission resource set is determined based on the PSFCH transmission opportunity index, including: One or more comb teeth that can be used to transmit the first PSFCH are determined based on the PSFCH transmission opportunity index, and the one or more comb teeth constitute the second candidate transmission resource set.

26. The method according to claim 25, characterized in that The transmission resources in the second candidate transmission resource set are first indexed in an ascending order of comb index, then in an ascending order of resource block group index, and then in an ascending order of code domain resource index; or, The transmission resources in the second candidate transmission resource set are first indexed in order of resource block group index from low to high, then in order of comb index from low to high, and then in order of code domain resource index from low to high.

27. The method according to claim 18, characterized in that The number of transmission resources included in the second candidate transmission resource set is determined based on the first number, the second number, the third number, and the fourth number.

28. The method according to claim 27, characterized in that The number L2 of resource block groups included in the second candidate transmission resource set satisfies: Wherein, A represents the first quantity, B a represents the second quantity, C a,b represents the third quantity, N represents the fourth quantity, floor represents rounding down, a and b are both integers, and the value range of a is [0, A-1], and the value range of b is [0, B a -1].

29. The method according to claim 17, 18, 27 or 28, characterized in that The second candidate transmission resource set is determined based on the PSFCH transmission opportunity index, including: One or more RB resource block groups that can be used to transmit the first PSFCH are determined based on the PSFCH transmission opportunity index, and the one or more resource block groups constitute the second candidate transmission resource set.

30. The method according to claim 29, characterized in that The transmission resources in the second candidate transmission resource set are first indexed in an ascending order of resource block group indexes and then in an ascending order of code domain resource indexes.

31. The method according to any one of claims 17 to 30, characterized in that The dedicated RB occupied by the first PSFCH is determined from the second candidate transmission resource set based on a twenty-first parameter, where the twenty-first parameter includes one or more of the following: The second parameter is determined based on an index corresponding to a first subchannel of a transmission resource of the first PSSCH, an index corresponding to a first comb tooth, or an index corresponding to a first RB; The third parameter is determined based on the number of subchannels, the number of comb teeth, or the number of RBs included in the transmission resources of the first PSSCH; A fourth parameter is determined based on a time slot index corresponding to a transmission resource of the first PSSCH; A fifth parameter is determined based on an index of an RB set corresponding to the transmission resource of the first PSSCH; A sixth parameter is determined based on the number of RB sets corresponding to the transmission resources of the first PSSCH; A seventh parameter is determined based on an index of a transmission opportunity corresponding to the first PSFCH; An eighth parameter is determined based on the total number of transmission opportunities corresponding to the first PSFCH; A ninth parameter is determined based on the first identification information, where the first identification information includes second identification information and / or third identification information, where the second identification information is determined based on a source identification included in the first SCI, where the first SCI is used to schedule a first PSSCH, and the third identification information is 0 or the third identification information is determined based on a member identification of the terminal device in the communication group; as well as an eleventh parameter, determined based on the total number of resources included in the second candidate transmission resource set; The first PSSCH is associated with the first PSFCH.

32. The method according to claim 31, characterized in that The dedicated RB occupied by the first PSFCH is determined from the second candidate transmission resource set based on a twenty-first parameter, including: The dedicated RB occupied by the first PSFCH is determined based on an index corresponding to a transmission resource of the first PSFCH, and the index is determined from the second candidate transmission resource set based on the twenty-first parameter.

33. The method according to claim 17, characterized in that The dedicated RB occupied by the first PSFCH is determined from a third candidate transmission resource set, and the third candidate transmission resource set is determined from the second candidate transmission resource set.

34. The method according to claim 33, characterized in that The third candidate transmission resource set is determined from the second candidate transmission resource set based on a twelfth parameter, where the twelfth parameter includes one or more of the following: The second parameter is determined based on an index corresponding to a first subchannel of a transmission resource of the first PSSCH, an index corresponding to a first comb tooth, or an index corresponding to a first RB; The third parameter is determined based on the number of subchannels, the number of comb teeth, or the number of RBs included in the transmission resources of the first PSSCH; A fourth parameter is determined based on a time slot index corresponding to a transmission resource of the first PSSCH; A fifth parameter is determined based on an index of an RB set corresponding to the transmission resource of the first PSSCH; A sixth parameter is determined based on the number of RB sets corresponding to the transmission resources of the first PSSCH; as well as The eleventh parameter is determined based on the total number of resources included in the second candidate transmission resource set.

35. The method according to claim 33 or 34, characterized in that The dedicated RB occupied by the first PSFCH is determined from the third candidate transmission resource set based on a thirteenth parameter, where the thirteenth parameter includes one or more of the following: The third parameter is determined based on the number of subchannels, the number of comb teeth, or the number of RBs included in the transmission resources of the first PSSCH; A fifth parameter is determined based on an index of an RB set corresponding to the transmission resource of the first PSSCH; A sixth parameter is determined based on the number of RB sets corresponding to the transmission resources of the first PSSCH; A ninth parameter is determined based on the first identification information, where the first identification information includes second identification information and / or third identification information, where the second identification information is determined based on a source identification included in the first SCI, where the first SCI is used to schedule a first PSSCH, and the third identification information is 0 or the third identification information is determined based on a member identification of the terminal device in the communication group; as well as The fourteenth parameter is determined based on the total number of resources included in the third candidate transmission resource set.

36. The method according to claim 34 or 35, characterized in that The second candidate transmission resource set is determined based on the PSFCH transmission opportunity index, including: One or more RB sets that can be used to transmit the first PSFCH are determined based on the PSFCH transmission opportunity index, and the one or more RB sets constitute the second candidate transmission resource set; The third candidate transmission resource set is determined from the second candidate transmission resource set based on the twelfth parameter, including: One or more comb teeth that can be used to transmit the first PSFCH are determined from the second candidate transmission resource set based on the twelfth parameter, and the one or more comb teeth constitute the third candidate transmission resource set.

37. The method according to claim 36, characterized in that The transmission resources in the second candidate transmission resources are first indexed in order from low to high according to the RB set index, and then indexed in order from low to high according to the comb index; or, The transmission resources in the second candidate transmission resources are first indexed in an ascending order according to the comb index, and then indexed in an ascending order according to the RB set index.

38. The method according to claim 36 or 37, characterized in that The transmission resources in the third candidate transmission resources are first indexed in the order of comb index from low to high, then in the order of resource block group index from low to high, and then in the order of code domain resource index from low to high; or, The transmission resources in the third candidate transmission resources are first indexed in the order of resource block group index from low to high, then in the order of comb index from low to high, and then in the order of code domain resource index from low to high.

39. The method according to claim 34 or 35, characterized in that The second candidate transmission resource set is determined based on the PSFCH transmission opportunity index, including: One or more RB sets that can be used to transmit the first PSFCH are determined based on the PSFCH transmission opportunity index, and the one or more RB sets constitute the second candidate transmission resource set; The third candidate transmission resource set is determined from the second candidate transmission resource set based on the twelfth parameter, including: One or more resource block groups that can be used to transmit the first PSFCH are determined from the second candidate transmission resource set based on the twelfth parameter, and the one or more resource block groups constitute the third candidate transmission resource set.

40. The method according to claim 39, characterized in that The transmission resources in the second candidate transmission resources are first indexed in the order of RB set index from low to high, then in the order of comb index from low to high, and then in the order of resource block group index from low to high; or, The transmission resources in the second candidate transmission resources are first indexed in the order of resource block group index from low to high, then in the order of comb tooth index from low to high, and then in the order of RB set index from low to high; or, The transmission resources in the second candidate transmission resources are first indexed in an ascending order according to the comb index, then in an ascending order according to the RB set index, and then in an ascending order according to the resource block group index; or, The transmission resources in the second candidate transmission resources are first indexed in an ascending order according to the comb index, then in an ascending order according to the resource block group index, and then in an ascending order according to the RB set index.

41. The method according to claim 39 or 40, characterized in that The transmission resources in the third candidate transmission resources are first indexed in the order of resource block group index from low to high, and then indexed in the order of code domain resource index from low to high.

42. The method according to claim 34 or 35, characterized in that The second candidate transmission resource set is determined based on the PSFCH transmission opportunity index, including: One or more comb teeth that can be used to transmit the first PSFCH are determined based on the PSFCH transmission opportunity index, and the one or more comb teeth constitute the second candidate transmission resource set; The third candidate transmission resource set is determined from the second candidate transmission resource set based on the twelfth parameter, including: One or more comb teeth that can be used to transmit the first PSFCH are determined from the second candidate transmission resource set based on the twelfth parameter, and the one or more comb teeth constitute the third candidate transmission resource set.

43. The method according to claim 42, characterized in that The second candidate transmission resource set is indexed in an ascending order of comb indexes.

44. The method according to claim 42 or 43, characterized in that The transmission resources in the third candidate transmission resources are first indexed in the order of comb index from low to high, then in the order of resource block group index from low to high, and then in the order of code domain resource index from low to high; or, The transmission resources in the third candidate transmission resources are first indexed in the order of resource block group index from low to high, then in the order of comb index from low to high, and then in the order of code domain resource index from low to high.

45. The method according to claim 34 or 35, characterized in that The second candidate transmission resource set is determined based on the PSFCH transmission opportunity index, including: One or more comb teeth that can be used to transmit the first PSFCH are determined based on the PSFCH transmission opportunity index, and the one or more comb teeth constitute the second candidate transmission resource set; The third candidate transmission resource set is determined from the second candidate transmission resource set based on the twelfth parameter, including: One or more resource block groups that can be used to transmit the first PSFCH are determined from the second candidate transmission resource set based on the twelfth parameter, and the one or more resource block groups constitute the third candidate transmission resource set.

46. ​​The method according to claim 45, characterized in that The transmission resources in the second candidate transmission resources are first indexed in an ascending order according to the comb index, and then indexed in an ascending order according to the resource block group index; or, The transmission resources in the second candidate transmission resources are first indexed in the order of resource block group index from low to high, and then indexed in the order of comb tooth index from low to high.

47. The method according to claim 45 or 46, characterized in that The transmission resources in the third candidate transmission resources are first indexed in the order of resource block group index from low to high, and then indexed in the order of code domain resource index from low to high.

48. The method according to claim 34 or 35, characterized in that The second candidate transmission resource set is determined based on the PSFCH transmission opportunity index, including: One or more resource block groups that can be used to transmit the first PSFCH are determined based on the PSFCH transmission opportunity index, and the one or more resource block groups constitute the second candidate transmission resource set; The third candidate transmission resource set is determined from the second candidate transmission resource set based on the twelfth parameter, including: One or more resource block groups that can be used to transmit the first PSFCH are determined from the second candidate transmission resource set based on the twelfth parameter, and the one or more resource block groups constitute the third candidate transmission resource set.

49. The method according to claim 48, characterized in that The transmission resources in the second candidate transmission resources are indexed in order of resource block group index from low to high.

50. The method according to claim 48 or 49, characterized in that The transmission resources in the third candidate transmission resources are first indexed in the order of resource block group index from low to high, and then indexed in the order of code domain resource index from low to high.

51. The method of claim 38, 41, 44, 47 or 50, wherein: The dedicated RB occupied by the first PSFCH is determined from the third candidate transmission resource set based on a thirteenth parameter, including: The dedicated RB occupied by the first PSFCH is determined based on an index corresponding to a transmission resource of the first PSFCH, and the index is determined from the third candidate transmission resource set based on the thirteenth parameter.

52. The method according to claim 1 or 2, characterized in that The dedicated RB occupied by the first PSFCH is determined from a fourth candidate transmission resource set, and the fourth candidate transmission resource set is determined based on a fifteenth parameter, where the fifteenth parameter includes one or more of the following: The second parameter is determined based on an index corresponding to a first subchannel of a transmission resource of the first PSSCH, an index corresponding to a first comb tooth, or an index corresponding to a first RB; The third parameter is determined based on the number of subchannels, the number of comb teeth, or the number of RBs included in the transmission resources of the first PSSCH; A fourth parameter is determined based on a time slot index corresponding to a transmission resource of the first PSSCH; A fifth parameter is determined based on an index of an RB set corresponding to the transmission resource of the first PSSCH; as well as A sixth parameter is determined based on the number of RB sets corresponding to the transmission resources of the first PSSCH; The first PSSCH is associated with the first PSFCH.

53. The method according to claim 52, characterized in that The fourth candidate transmission resource set is determined based on the fifteenth parameter, including: One or more RB sets that can be used to transmit the first PSFCH are determined based on the fifteenth parameter, and the one or more RB sets constitute the fourth candidate transmission resource set.

54. The method according to claim 53, characterized in that The transmission resources in the fourth candidate transmission resource set are first indexed in the order of RB set index from low to high, then in the order of comb index from low to high, then in the order of resource block group index from low to high, and then in the order of code domain resource index from low to high; or, The transmission resources in the fourth candidate transmission resource set are first indexed in the order of comb index from low to high, then in the order of resource block group index from low to high, then in the order of RB set index from low to high, and then in the order of code domain resource index from low to high; or, The transmission resources in the fourth candidate transmission resource set are first indexed in the order of comb index from low to high, then in the order of RB set index from low to high, then in the order of resource block group index from low to high, and then in the order of code domain resource index from low to high; or, The transmission resources in the fourth candidate transmission resource set are first indexed in order from low to high according to the resource block group index, then in order from low to high according to the comb index, then in order from low to high according to the RB set index, and then in order from low to high according to the code domain resource index.

55. The method according to claim 52, characterized in that The fourth candidate transmission resource set is determined based on the fifteenth parameter, including: One or more comb teeth that can be used to transmit the first PSFCH are determined based on the fifteenth parameter, and the one or more comb teeth constitute the fourth candidate transmission resource set.

56. The method according to claim 55, characterized in that The transmission resources in the fourth candidate transmission resource set are first indexed in the order of comb index from low to high, then in the order of resource block group index from low to high, and then in the order of code domain resource index from low to high; or, The transmission resources in the fourth candidate transmission resource set are first indexed in the order of resource block group index from low to high, then in the order of comb index from low to high, and then in the order of code domain resource index from low to high.

57. The method according to claim 52, characterized in that The fourth candidate transmission resource set is determined based on the fifteenth parameter, including: One or more resource block groups that can be used to transmit the first PSFCH are determined based on the fifteenth parameter, and the one or more resource block groups constitute the fourth candidate transmission resource set.

58. The method according to claim 57, characterized in that The transmission resources in the fourth candidate transmission resource set are first indexed in an ascending order of resource block group indexes and then in an ascending order of code domain resource indexes.

59. The method according to any one of claims 52 to 58, characterized in that The dedicated RB occupied by the first PSFCH is determined from the fourth candidate transmission resource set based on a sixteenth parameter, where the sixteenth parameter includes one or more of the following: The third parameter is determined based on the number of subchannels, the number of comb teeth, or the number of RBs included in the transmission resources of the first PSSCH; A fifth parameter is determined based on an index of an RB set corresponding to the transmission resource of the first PSSCH; A sixth parameter is determined based on the number of RB sets corresponding to the transmission resources of the first PSSCH; A seventh parameter is determined based on an index of a transmission opportunity corresponding to the first PSFCH; An eighth parameter is determined based on the total number of transmission opportunities corresponding to the first PSFCH; A ninth parameter is determined based on the first identification information, where the first identification information includes second identification information and / or third identification information, where the second identification information is determined based on a source identification included in the first SCI, where the first SCI is used to schedule a first PSSCH, and the third identification information is 0 or the third identification information is determined based on a member identification of the terminal device in the communication group; as well as A seventeenth parameter is determined based on the total number of resources of the fourth candidate transmission resource set; The first PSSCH is associated with the first PSFCH.

60. The method according to claim 59, characterized in that The dedicated RB occupied by the first PSFCH is determined from the fourth candidate transmission resource set based on a sixteenth parameter, including: Determine, based on the sixteenth parameter, an index corresponding to the transmission resource of the first PSFCH from the fourth candidate transmission resource set, A dedicated RB occupied by the first PSFCH is determined based on the index.

61. The method according to claim 52, characterized in that The dedicated RB occupied by the first PSFCH is determined from a fifth candidate transmission resource set, and the fifth candidate transmission resource set is determined from the fourth candidate transmission resource set.

62. The method according to claim 61, characterized in that The fifth candidate transmission resource set is determined from the fourth candidate transmission resource set based on an eighteenth parameter, where the eighteenth parameter includes one or more of the following: A seventh parameter is determined based on an index of a transmission opportunity corresponding to the first PSFCH; An eighth parameter is determined based on the total number of transmission opportunities corresponding to the first PSFCH; as well as The seventeenth parameter is determined based on the total number of resources in the fourth candidate transmission resource set.

63. The method according to claim 61 or 62, characterized in that The dedicated RB occupied by the first PSFCH is determined from the fifth candidate transmission resource set based on a nineteenth parameter, where the nineteenth parameter includes one or more of the following: The third parameter is determined based on the number of subchannels, the number of comb teeth, or the number of RBs included in the transmission resources of the first PSSCH; A fifth parameter is determined based on an index of an RB set corresponding to the transmission resource of the first PSSCH; A sixth parameter is determined based on the number of RB sets corresponding to the transmission resources of the first PSSCH; A ninth parameter is determined based on the first identification information, where the first identification information includes second identification information and / or third identification information, where the second identification information is determined based on a source identification included in the first SCI, where the first SCI is used to schedule a first PSSCH, and the third identification information is 0 or the third identification information is determined based on a member identification of the terminal device in the communication group; as well as The twentieth parameter is determined based on the total number of resources in the fifth candidate transmission resource set.

64. The method according to claim 62 or 63, characterized in that The fourth candidate transmission resource set is determined based on the fifteenth parameter, including: One or more RB sets that can be used to transmit the first PSFCH are determined based on the fifteenth parameter, and the one or more RB sets constitute the fourth candidate transmission resource set; The fifth candidate transmission resource set is determined from the fourth candidate transmission resource set based on the eighteenth parameter, including: One or more comb teeth that can be used to transmit the first PSFCH are determined from the fourth candidate transmission resource set based on the eighteenth parameter, and the one or more comb teeth constitute the fifth candidate transmission resource set.

65. The method according to claim 64, characterized in that The transmission resources in the fourth candidate transmission resources are first indexed in the order of RB set index from low to high, and then indexed in the order of comb index from low to high; or, The transmission resources in the fourth candidate transmission resources are first indexed in an ascending order according to the comb index, and then indexed in an ascending order according to the RB set index.

66. The method according to claim 64 or 65, characterized in that The transmission resources in the fifth candidate transmission resources are first indexed in the order of comb index from low to high, then in the order of resource block group index from low to high, and then in the order of code domain resource index from low to high; or, The transmission resources in the fifth candidate transmission resource are first indexed in the order of resource block group index from low to high, then in the order of comb index from low to high, and then in the order of code domain resource index from low to high.

67. The method according to claim 62 or 63, characterized in that The fourth candidate transmission resource set is determined based on the fifteenth parameter, including: One or more RB sets that can be used to transmit the first PSFCH are determined based on the fifteenth parameter, and the one or more RB sets constitute the fourth candidate transmission resource set; The fifth candidate transmission resource set is determined from the fourth candidate transmission resource set based on the eighteenth parameter, including: One or more resource block groups that can be used to transmit the first PSFCH are determined from the fourth candidate transmission resource set based on the eighteenth parameter, and the one or more resource block groups constitute the fifth candidate transmission resource set.

68. The method according to claim 67, characterized in that The transmission resources in the fourth candidate transmission resources are first indexed in the order of RB set index from low to high, then in the order of comb index from low to high, and then in the order of resource block group index from low to high; or, The transmission resources in the fourth candidate transmission resources are first indexed in the order of resource block group index from low to high, then in the order of comb index from low to high, and then in the order of RB set index from low to high; or, The transmission resources in the fourth candidate transmission resources are first indexed in the order of comb index from low to high, then in the order of RB set index from low to high, and then in the order of resource block group index from low to high; or, The transmission resources in the fourth candidate transmission resources are first indexed in the order of comb index from low to high, then in the order of resource block group index from low to high, and then in the order of RB set index from low to high.

69. The method according to claim 67 or 68, characterized in that The transmission resources in the fifth candidate transmission resource are first sorted in descending order according to the resource block group index, and then in descending order according to the code domain resource index. Indexes are ordered from low to high.

70. The method according to claim 62 or 63, characterized in that The fourth candidate transmission resource set is determined based on the fifteenth parameter, including: One or more comb teeth that can be used to transmit the first PSFCH are determined based on the fifteenth parameter, and the one or more comb teeth constitute the fourth candidate transmission resource set; The fifth candidate transmission resource set is determined from the fourth candidate transmission resource set based on the eighteenth parameter, including: One or more comb teeth that can be used to transmit the first PSFCH are determined from the fourth candidate transmission resource set based on the eighteenth parameter, and the one or more comb teeth constitute the fifth candidate transmission resource set.

71. The method according to claim 70, characterized in that The transmission resources in the fourth candidate transmission resources are indexed in the order of comb index from low to high.

72. The method according to claim 70 or 71, characterized in that The transmission resources in the fifth candidate transmission resources are first indexed in the order of comb index from low to high, then in the order of resource block group index from low to high, and then in the order of code domain resource index from low to high; or, The transmission resources in the fifth candidate transmission resource are first indexed in the order of resource block group index from low to high, then in the order of comb index from low to high, and then in the order of code domain resource index from low to high.

73. The method according to claim 62 or 63, characterized in that The fourth candidate transmission resource set is determined based on the fifteenth parameter, including: One or more comb teeth that can be used to transmit the first PSFCH are determined based on the fifteenth parameter, and the one or more comb teeth constitute the fourth candidate transmission resource set; The fifth candidate transmission resource set is determined from the fourth candidate transmission resource set based on the eighteenth parameter, including: One or more resource block groups that can be used to transmit the first PSFCH are determined from the fourth candidate transmission resource set based on the eighteenth parameter, and the one or more resource block groups constitute the fifth candidate transmission resource set.

74. The method according to claim 73, characterized in that The transmission resources in the fourth candidate transmission resources are first indexed in the order of comb index from low to high, and then indexed in the order of resource block group index from low to high; or, The transmission resources in the fourth candidate transmission resources are first indexed in the order of resource block group index from low to high, and then indexed in the order of comb tooth index from low to high.

75. The method according to claim 73 or 74, characterized in that The transmission resources in the fifth candidate transmission resources are first indexed in the order of resource block group index from low to high, and then indexed in the order of code domain resource index from low to high.

76. The method according to claim 62 or 63, characterized in that The fourth candidate transmission resource set is determined based on the fifteenth parameter, including: One or more resource block groups that can be used to transmit the first PSFCH are determined based on the fifteenth parameter, and the one or more resource block groups constitute the fourth candidate transmission resource set; The fifth candidate transmission resource set is determined from the fourth candidate transmission resource set based on the eighteenth parameter, including: One or more resource block groups that can be used to transmit the first PSFCH are determined from the fourth candidate transmission resource set based on the eighteenth parameter, and the one or more resource block groups constitute the fifth candidate transmission resource set.

77. The method according to claim 76, characterized in that The transmission resources in the fourth candidate transmission resources are indexed in order of resource block group index from low to high.

78. The method according to claim 76 or 77, characterized in that The transmission resources in the fifth candidate transmission resources are first indexed in the order of resource block group index from low to high, and then indexed in the order of code domain resource index from low to high.

79. The method of claim 66, 69, 72, 75 or 78, wherein: The transmission resources occupied by the first PSFCH are determined from the fifth candidate transmission resource set based on the nineteenth parameter, including: Based on the nineteenth parameter, an index corresponding to the transmission resource of the first PSFCH is determined from the fifth candidate transmission resource set, and based on the index, a dedicated RB occupied by the first PSFCH is determined.

80. The method according to claims 1 to 79, characterized in that In the case where the first terminal device determines the transmission resources of the second PSFCH, if the transmission resources of the first PSFCH and the transmission resources of the second PSFCH are located in the same RB set, the transmission resources of the first PSFCH and the transmission resources of the second PSFCH include the same common comb teeth.

81. The method according to any one of claims 1 to 80, characterized in that The first PSSCH is associated with the first PSFCH, the transmission resources of the first PSSCH include a second RB set, and the first terminal device determines the transmission resources of the first physical sideline feedback channel PSFCH, including: The first terminal device determines the transmission resources of the first PSFCH within the second RB set.

82. The method according to claim 81, characterized in that The first terminal device determines the transmission resource of the first PSFCH in the second RB set, including: The first terminal device determines, within the second RB set, transmission resources of the first PSFCH based on one or more of the following parameters: Index information corresponding to the second RB set; An index corresponding to the first subchannel, an index corresponding to the first comb tooth, or an index corresponding to the first RB of the transmission resource of the first PSSCH in the second RB set; the number of subchannels, the number of comb teeth, or the number of RBs included in the second RB set by the transmission resources of the first PSSCH; The timeslot index corresponding to the transmission resource of the first PSSCH; an index of a transmission opportunity corresponding to the first PSFCH; The total number of transmission opportunities corresponding to the first PSFCH; first identification information; Among them, the first identification information includes second identification information and / or third identification information, the second identification information is determined based on the source identification included in the first SCI, the first SCI is used to schedule the first PSSCH, and the third identification information is 0 or the third identification information is determined based on the member identification of the terminal device in the communication group.

83. The method according to claim 81 or 82, characterized in that The second RB set is the first RB set among one or more RB sets corresponding to the transmission resources of the first PSSCH.

84. The method according to any one of claims 81 to 83, characterized in that The transmission resources of the first PSSCH also include a third RB set, and the first terminal device determines the transmission resources of the first physical sideline feedback channel PSFCH, including: The first terminal device determines the transmission resources of the first PSFCH within the third RB set.

85. The method according to claim 84, characterized in that The first terminal device determines the transmission resource of the first PSFCH in the third RB set, including: If the first terminal device has no PSFCH to be sent in the third RB set within the time domain resources corresponding to the first PSFCH transmission resources, the first terminal device determines the transmission resources of the first PSFCH in the third RB set.

86. The method according to any one of claims 81 to 83, characterized in that If the transmission resources of the first PSSCH correspond to multiple RB sets, the first terminal device determines the transmission resources of the first PSFCH in the multiple RB sets respectively.

87. The method according to any one of claims 81 to 83, characterized in that The transmission resource of the first PSSCH further includes a third RB set, and the method further includes: The first terminal device determines a transmission resource of a third PSFCH within the third RB set; The transmission resources of the third PSFCH include common comb teeth in the third RB set, and the time domain resources of the third PSFCH and the first PSFCH are the same.

88. The method according to claim 87, characterized in that The first terminal device determines a transmission resource of a third PSFCH in the third RB set, including: If the first terminal device has no PSFCH to be sent in the third RB set within the time domain resources corresponding to the first PSFCH transmission resources, the first terminal device determines the transmission resources of the third PSFCH in the third RB set.

89. The method according to claim 87 or 88, characterized in that The method further comprises: The first terminal device sends the first PSFCH and the third PSFCH.

90. A terminal device, characterized in that: The terminal device is a first terminal device, and the terminal device includes: A determining unit, configured to determine a transmission resource of a first physical sideline feedback channel PSFCH; The transmission resource of the first PSFCH includes one or more of the following: The common comb teeth occupied by the first PSFCH; and The first PSFCH occupies a dedicated resource block RB.

91. The terminal device according to claim 90, characterized in that: The common comb teeth are determined based on one or more of the following: Protocol predefined information; Pre-configuration information; Configuration information of network devices; and Instruction information sent by the target terminal device; Among them, the target terminal device is a terminal device that sends the first PSFCH, a terminal device that receives the first PSFCH, a terminal device that sends a first physical sideline shared channel PSSCH, or a terminal device that receives the first PSSCH, and the first PSSCH is associated with the first PSFCH.

92. The terminal device according to claim 90 or 91, characterized in that: For a PSFCH transmission opportunity, the dedicated RB occupied by the first PSFCH is determined from a first candidate transmission resource set.

93. The terminal device according to claim 92, characterized in that: The transmission resources in the first candidate transmission resource set are first indexed in order of available RB set index from low to high, then in order of comb index from low to high, then in order of resource block group index from low to high, and then in order of code domain resource index from low to high; or, The transmission resources in the first candidate transmission resource set are first indexed in the order of comb index from low to high, then in the order of resource block group index from low to high, then in the order of available RB set index from low to high, and then in the order of code domain resource index from low to high; or, The transmission resources in the first candidate transmission resource set are first indexed in the order of comb tooth index from low to high, then in the order of available RB set index from low to high, then in the order of resource block group index from low to high, and then in the order of code domain resource index from low to high; or, The transmission resources in the first candidate transmission resource set are first indexed in order from low to high according to the resource block group index, then in order from low to high according to the comb tooth index, then in order from low to high according to the available RB set index, and then in order from low to high according to the code domain resource index.

94. The terminal device according to claim 93, characterized in that: The available RB set is determined based on one or more of the following: A set of RBs corresponding to the transmission resources of the first PSSCH; a set of RBs included in the resource pool corresponding to the first PSSCH; and Whether the transmission opportunity corresponding to the first PSFCH is the first PSFCH transmission opportunity among the N PSFCH transmission opportunities associated with the first PSSCH; The first PSSCH is associated with the first PSFCH.

95. The terminal device according to claim 94, characterized in that: If the transmission opportunity corresponding to the first PSFCH is the first PSFCH transmission opportunity among the N PSFCH transmission opportunities, the available RB set includes the RB set corresponding to the transmission resource of the first PSSCH; and / or If the transmission opportunity corresponding to the first PSFCH is not the first PSFCH transmission opportunity among the N PSFCH transmission opportunities, the available RB set includes the RB set included in the resource pool.

96. The terminal device according to any one of claims 93 to 95, characterized in that: The frequency domain range of a comb tooth in the first candidate transmission resource set corresponds to the frequency domain range of a comb tooth in an RB set.

97. The terminal device according to any one of claims 93 to 96, characterized in that: The comb teeth in the first candidate transmission resource set do not include the common comb teeth.

98. The terminal device according to any one of claims 93 to 97, characterized in that: The comb teeth that can be used for PSFCH transmission in different RB sets in the resource pool are configured independently.

99. The terminal device according to any one of claims 93 to 98, characterized in that: One resource block group corresponds to K3 RBs in one comb tooth; wherein K3 is equal to the number of the dedicated RBs, and K3 is a positive integer greater than or equal to 1.

100. The terminal device according to claim 99, characterized in that: If a comb tooth includes A RBs, the number of resource block groups contained in the comb tooth is equal to Where A is a positive integer greater than or equal to 1, It represents the number of combinations formed by selecting K3 elements from A elements.

101. The terminal device according to claim 99, characterized in that: If a comb tooth includes A RBs, the number of resource block groups included in the comb tooth is equal to floor(A / K3); wherein A is a positive integer greater than or equal to 1, and floor means rounding down.

102. The terminal device according to claim 99, characterized in that: If one comb tooth includes A RBs, and K3=1, then the number of resource block groups included in the one comb tooth is equal to A; wherein A is a positive integer greater than or equal to 1.

103. The terminal device according to any one of claims 93 to 102, characterized in that: If an RB set includes a first comb tooth and a second comb tooth, the number of RBs included in the first comb tooth and the number of RBs included in the second comb tooth are the same or different.

104. The terminal device according to any one of claims 93 to 103, characterized in that: The number of code domain resources is determined based on one or more of the following: The number of cyclic shift pairs that can be code-division multiplexed within one RB; and The number of resources that can be code-division multiplexed between RBs included in a resource block group.

105. The terminal device according to any one of claims 92 to 104, characterized in that: The dedicated RB occupied by the first PSFCH is determined from the first candidate transmission resource set based on a first parameter, where the first parameter includes one or more of the following: The second parameter is determined based on an index corresponding to a first subchannel of a transmission resource of the first PSSCH, an index corresponding to a first comb tooth, or an index corresponding to a first RB; The third parameter is determined based on the number of subchannels, the number of comb teeth, or the number of RBs included in the transmission resources of the first PSSCH; A fourth parameter is determined based on a time slot index corresponding to a transmission resource of the first PSSCH; A fifth parameter is determined based on an index of an RB set corresponding to the transmission resource of the first PSSCH; A sixth parameter is determined based on the number of RB sets corresponding to the transmission resources of the first PSSCH; A seventh parameter is determined based on an index of a transmission opportunity corresponding to the first PSFCH; An eighth parameter is determined based on the total number of transmission opportunities corresponding to the first PSFCH; A ninth parameter is determined based on the first identification information, where the first identification information includes second identification information and / or third identification information, where the second identification information is determined based on a source identifier included in the first sideline control information SCI, where the first SCI is used to schedule a first PSSCH, and the third identification information is 0 or the third identification information is determined based on a member identifier of the terminal device in the communication group; as well as a tenth parameter, determined based on the total number of resources included in the first candidate transmission resource set; The first PSSCH is associated with the first PSFCH.

106. The terminal device according to claim 90 or 91, characterized in that: The dedicated RB occupied by the first PSFCH is determined from a second candidate transmission resource set, wherein the second candidate transmission resource set is determined based on a PSFCH transmission opportunity index.

107. The terminal device according to claim 106, characterized in that: The number of transmission resources included in the second candidate transmission resource set is determined based on one or more of the following: A first number is determined based on the number of first RB sets available for PSFCH transmission; The second number is determined based on the number of comb teeth that can be used for PSFCH transmission and included in an RB in the first RB set; The third number is determined based on the number of resource block groups that can be used for PSFCH transmission and are included in one comb tooth in the one RB set; as well as The fourth number is determined based on the number N of PSFCH transmission opportunities.

108. The terminal device according to claim 107, characterized in that: The number of transmission resources included in the second candidate transmission resource set is determined based on the first number and the fourth number.

109. The terminal device according to claim 107 or 108, characterized in that: The number L0 of RB sets included in the second candidate transmission resource set satisfies: L0=A / N or L0=floor(A / N); wherein A represents the first number and floor represents rounding down.

110. The terminal device according to any one of claims 106 to 109, characterized in that: The second candidate transmission resource set is determined based on the PSFCH transmission opportunity index, including: One or more RB sets that can be used to transmit the first PSFCH are determined based on the PSFCH transmission opportunity index, and the one or more RB sets constitute the second candidate transmission resource set.

111. The terminal device according to claim 110, characterized in that: The transmission resources in the second candidate transmission resource set are first indexed in order of RB set index from low to high, then in order of comb index from low to high, then in order of resource block group index from low to high, and then in order of code domain resource index from low to high; or, The transmission resources in the second candidate transmission resource set are first indexed in an ascending order of comb tooth index, then in an ascending order of resource block group index, then in an ascending order of RB set index, and then in an ascending order of code domain resource index; or, The transmission resources in the second candidate transmission resource set are first indexed in an ascending order of comb tooth index, then in an ascending order of RB set index, then in an ascending order of resource block group index, and then in an ascending order of code domain resource index; or, The transmission resources in the second candidate transmission resource set are first indexed in order from low to high according to the resource block group index, then in order from low to high according to the comb index, then in order from low to high according to the RB set index, and then in order from low to high according to the code domain resource index.

112. The terminal device according to claim 107, characterized in that: The number of transmission resources included in the second candidate transmission resource set is determined based on the first number, the second number, and the fourth number.

113. The terminal device according to claim 107 or 112, characterized in that: The number of comb teeth L1 included in the second candidate transmission resource set satisfies: Wherein, A represents the first quantity, B a represents the second quantity, N represents the fourth quantity, floor represents rounding down, a is an integer, and the value range of a is [0, A-1].

114. The terminal device according to claim 106, 107, 112 or 113, characterized in that: The second candidate transmission resource set is determined based on the PSFCH transmission opportunity index, including: One or more comb teeth that can be used to transmit the first PSFCH are determined based on the PSFCH transmission opportunity index, and the one or more comb teeth constitute the second candidate transmission resource set.

115. The terminal device according to claim 114, characterized in that: The transmission resources in the second candidate transmission resource set are first indexed in an ascending order of comb index, then in an ascending order of resource block group index, and then in an ascending order of code domain resource index; or, The transmission resources in the second candidate transmission resource set are first indexed in order of resource block group index from low to high, then in order of comb index from low to high, and then in order of code domain resource index from low to high.

116. The terminal device according to claim 107, characterized in that: The number of transmission resources included in the second candidate transmission resource set is determined based on the first number, the second number, the third number, and the fourth number.

117. The terminal device according to claim 116, characterized in that: The number L2 of resource block groups included in the second candidate transmission resource set satisfies: Wherein, A represents the first quantity, B a represents the second quantity, C a,b represents the third quantity, N represents the fourth quantity, floor represents rounding down, a and b are both integers, and the value range of a is [0, A-1], and the value range of b is [0, B a -1].

118. The terminal device according to claim 106, 107, 116 or 117, characterized in that: The second candidate transmission resource set is determined based on the PSFCH transmission opportunity index, including: One or more RB resource block groups that can be used to transmit the first PSFCH are determined based on the PSFCH transmission opportunity index, and the one or more resource block groups constitute the second candidate transmission resource set.

119. The terminal device according to claim 118, characterized in that: The transmission resources in the second candidate transmission resource set are first indexed in an ascending order of resource block group indexes and then in an ascending order of code domain resource indexes.

120. The terminal device according to any one of claims 106 to 119, characterized in that: The dedicated RB occupied by the first PSFCH is determined from the second candidate transmission resource set based on a twenty-first parameter, where the twenty-first parameter includes one or more of the following: The second parameter is determined based on an index corresponding to a first subchannel of a transmission resource of the first PSSCH, an index corresponding to a first comb tooth, or an index corresponding to a first RB; The third parameter is determined based on the number of subchannels, the number of comb teeth, or the number of RBs included in the transmission resources of the first PSSCH; A fourth parameter is determined based on a time slot index corresponding to a transmission resource of the first PSSCH; A fifth parameter is determined based on an index of an RB set corresponding to the transmission resource of the first PSSCH; A sixth parameter is determined based on the number of RB sets corresponding to the transmission resources of the first PSSCH; A seventh parameter is determined based on an index of a transmission opportunity corresponding to the first PSFCH; An eighth parameter is determined based on the total number of transmission opportunities corresponding to the first PSFCH; A ninth parameter is determined based on the first identification information, where the first identification information includes second identification information and / or third identification information, where the second identification information is determined based on a source identification included in the first SCI, where the first SCI is used to schedule a first PSSCH, and the third identification information is 0 or the third identification information is determined based on a member identification of the terminal device in the communication group; as well as an eleventh parameter, determined based on the total number of resources included in the second candidate transmission resource set; The first PSSCH is associated with the first PSFCH.

121. The terminal device according to claim 120, characterized in that: The dedicated RB occupied by the first PSFCH is determined from the second candidate transmission resource set based on a twenty-first parameter, including: The dedicated RB occupied by the first PSFCH is determined based on an index corresponding to a transmission resource of the first PSFCH, and the index is determined from the second candidate transmission resource set based on the twenty-first parameter.

122. The terminal device according to claim 106, characterized in that: The dedicated RB occupied by the first PSFCH is determined from a third candidate transmission resource set, and the third candidate transmission resource set is determined from the second candidate transmission resource set.

123. The terminal device according to claim 122, characterized in that: The third candidate transmission resource set is determined from the second candidate transmission resource set based on a twelfth parameter, where the twelfth parameter includes one or more of the following: The second parameter is determined based on an index corresponding to a first subchannel of a transmission resource of the first PSSCH, an index corresponding to a first comb tooth, or an index corresponding to a first RB; The third parameter is determined based on the number of subchannels, the number of comb teeth, or the number of RBs included in the transmission resources of the first PSSCH; A fourth parameter is determined based on a time slot index corresponding to a transmission resource of the first PSSCH; A fifth parameter is determined based on an index of an RB set corresponding to the transmission resource of the first PSSCH; A sixth parameter is determined based on the number of RB sets corresponding to the transmission resources of the first PSSCH; as well as The eleventh parameter is determined based on the total number of resources included in the second candidate transmission resource set.

124. The terminal device according to claim 122 or 123, characterized in that: The dedicated RB occupied by the first PSFCH is determined from the third candidate transmission resource set based on a thirteenth parameter, where the thirteenth parameter includes one or more of the following: The third parameter is determined based on the number of subchannels, the number of comb teeth, or the number of RBs included in the transmission resources of the first PSSCH; A fifth parameter is determined based on an index of an RB set corresponding to the transmission resource of the first PSSCH; A sixth parameter is determined based on the number of RB sets corresponding to the transmission resources of the first PSSCH; A ninth parameter is determined based on the first identification information, where the first identification information includes second identification information and / or third identification information, where the second identification information is determined based on a source identification included in the first SCI, where the first SCI is used to schedule a first PSSCH, and the third identification information is 0 or the third identification information is determined based on a member identification of the terminal device in the communication group; as well as The fourteenth parameter is determined based on the total number of resources included in the third candidate transmission resource set.

125. The terminal device according to claim 123 or 124, characterized in that: The second candidate transmission resource set is determined based on the PSFCH transmission opportunity index, including: One or more RB sets that can be used to transmit the first PSFCH are determined based on the PSFCH transmission opportunity index, and the one or more RB sets constitute the second candidate transmission resource set; The third candidate transmission resource set is determined from the second candidate transmission resource set based on the twelfth parameter, including: One or more comb teeth that can be used to transmit the first PSFCH are determined from the second candidate transmission resource set based on the twelfth parameter, and the one or more comb teeth constitute the third candidate transmission resource set.

126. The terminal device according to claim 125, characterized in that: The transmission resources in the second candidate transmission resources are first indexed in the order of RB set index from low to high, and then indexed in the order of comb index from low to high; or, The transmission resources in the second candidate transmission resources are first indexed in an ascending order according to the comb index, and then indexed in an ascending order according to the RB set index.

127. The terminal device according to claim 125 or 126, characterized in that: The transmission resources in the third candidate transmission resources are first indexed in the order of comb index from low to high, then in the order of resource block group index from low to high, and then in the order of code domain resource index from low to high; or, The transmission resources in the third candidate transmission resources are first indexed in the order of resource block group index from low to high, then in the order of comb index from low to high, and then in the order of code domain resource index from low to high.

128. The terminal device according to claim 123 or 124, characterized in that: The second candidate transmission resource set is determined based on the PSFCH transmission opportunity index, including: One or more RB sets that can be used to transmit the first PSFCH are determined based on the PSFCH transmission opportunity index, and the one or more RB sets constitute the second candidate transmission resource set; The third candidate transmission resource set is determined from the second candidate transmission resource set based on the twelfth parameter, comprising: One or more resource block groups that can be used to transmit the first PSFCH are determined from the second candidate transmission resource set based on the twelfth parameter, and the one or more resource block groups constitute the third candidate transmission resource set.

129. The terminal device according to claim 128, characterized in that: The transmission resources in the second candidate transmission resources are first indexed in the order of RB set index from low to high, then in the order of comb index from low to high, and then in the order of resource block group index from low to high; or, The transmission resources in the second candidate transmission resources are first indexed in the order of resource block group index from low to high, then in the order of comb tooth index from low to high, and then in the order of RB set index from low to high; or, The transmission resources in the second candidate transmission resources are first indexed in an ascending order according to the comb index, then in an ascending order according to the RB set index, and then in an ascending order according to the resource block group index; or, The transmission resources in the second candidate transmission resources are first indexed in an ascending order according to the comb index, then in an ascending order according to the resource block group index, and then in an ascending order according to the RB set index.

130. The terminal device according to claim 128 or 129, characterized in that: The transmission resources in the third candidate transmission resources are first indexed in the order of resource block group index from low to high, and then indexed in the order of code domain resource index from low to high.

131. The terminal device according to claim 123 or 124, characterized in that: The second candidate transmission resource set is determined based on the PSFCH transmission opportunity index, including: One or more comb teeth that can be used to transmit the first PSFCH are determined based on the PSFCH transmission opportunity index, and the one or more comb teeth constitute the second candidate transmission resource set; The third candidate transmission resource set is determined from the second candidate transmission resource set based on the twelfth parameter, comprising: One or more comb teeth that can be used to transmit the first PSFCH are determined from the second candidate transmission resource set based on the twelfth parameter, and the one or more comb teeth constitute the third candidate transmission resource set.

132. The terminal device according to claim 131, characterized in that: The second candidate transmission resource set is indexed in an ascending order of comb indexes.

133. The terminal device according to claim 131 or 132, characterized in that: The transmission resources in the third candidate transmission resources are first indexed in the order of comb index from low to high, then in the order of resource block group index from low to high, and then in the order of code domain resource index from low to high; or, The transmission resources in the third candidate transmission resources are first indexed in the order of resource block group index from low to high, then in the order of comb index from low to high, and then in the order of code domain resource index from low to high.

134. The terminal device according to claim 123 or 124, characterized in that: The second candidate transmission resource set is determined based on the PSFCH transmission opportunity index, including: One or more comb teeth that can be used to transmit the first PSFCH are determined based on the PSFCH transmission opportunity index, and the one or more comb teeth constitute the second candidate transmission resource set; The third candidate transmission resource set is determined from the second candidate transmission resource set based on the twelfth parameter, comprising: One or more resource block groups that can be used to transmit the first PSFCH are determined from the second candidate transmission resource set based on the twelfth parameter, and the one or more resource block groups constitute the third candidate transmission resource set.

135. The terminal device according to claim 134, characterized in that: The transmission resources in the second candidate transmission resources are first indexed in an ascending order according to the comb index, and then indexed in an ascending order according to the resource block group index; or, The transmission resources in the second candidate transmission resources are first indexed in the order of resource block group index from low to high, and then indexed in the order of comb tooth index from low to high.

136. The terminal device according to claim 134 or 135, characterized in that: The transmission resources in the third candidate transmission resources are first indexed in the order of resource block group index from low to high, and then indexed in the order of code domain resource index from low to high.

137. The terminal device according to claim 123 or 124, characterized in that: The second candidate transmission resource set is determined based on the PSFCH transmission opportunity index, including: One or more resource block groups that can be used to transmit the first PSFCH are determined based on the PSFCH transmission opportunity index, and the one or more resource block groups constitute the second candidate transmission resource set; The third candidate transmission resource set is determined from the second candidate transmission resource set based on the twelfth parameter, including: One or more resource block groups that can be used to transmit the first PSFCH are determined from the second candidate transmission resource set based on the twelfth parameter, and the one or more resource block groups constitute the third candidate transmission resource set.

138. The terminal device according to claim 137, characterized in that: The transmission resources in the second candidate transmission resources are indexed in order of resource block group index from low to high.

139. The terminal device according to claim 137 or 138, characterized in that: The transmission resources in the third candidate transmission resources are first indexed in the order of resource block group index from low to high, and then indexed in the order of code domain resource index from low to high.

140. The terminal device according to claim 127, 130, 133, 136 or 139, characterized in that: The dedicated RB occupied by the first PSFCH is determined from the third candidate transmission resource set based on a thirteenth parameter, including: The dedicated RB occupied by the first PSFCH is determined based on an index corresponding to a transmission resource of the first PSFCH, and the index is determined from the third candidate transmission resource set based on the thirteenth parameter.

141. The terminal device according to claim 90 or 91, characterized in that: The dedicated RB occupied by the first PSFCH is determined from a fourth candidate transmission resource set, and the fourth candidate transmission resource set is determined based on a fifteenth parameter, where the fifteenth parameter includes one or more of the following: The second parameter is determined based on an index corresponding to a first subchannel of a transmission resource of the first PSSCH, an index corresponding to a first comb tooth, or an index corresponding to a first RB; The third parameter is determined based on the number of subchannels, the number of comb teeth, or the number of RBs included in the transmission resources of the first PSSCH; A fourth parameter is determined based on a time slot index corresponding to a transmission resource of the first PSSCH; A fifth parameter is determined based on an index of an RB set corresponding to the transmission resource of the first PSSCH; as well as A sixth parameter is determined based on the number of RB sets corresponding to the transmission resources of the first PSSCH; The first PSSCH is associated with the first PSFCH.

142. The terminal device according to claim 141, characterized in that: The fourth candidate transmission resource set is determined based on the fifteenth parameter, including: One or more RB sets that can be used to transmit the first PSFCH are determined based on the fifteenth parameter, and the one or more RB sets constitute the fourth candidate transmission resource set.

143. The terminal device according to claim 142, characterized in that: The transmission resources in the fourth candidate transmission resource set are first indexed in order from low to high according to the RB set index, then in order from low to high according to the comb index, then in order from low to high according to the resource block group index, and then in order from low to high according to the code domain resource index; or, The transmission resources in the fourth candidate transmission resource set are first indexed in the order of comb index from low to high, then in the order of resource block group index from low to high, then in the order of RB set index from low to high, and then in the order of code domain resource index from low to high; or, The transmission resources in the fourth candidate transmission resource set are first indexed in the order of comb index from low to high, then in the order of RB set index from low to high, then in the order of resource block group index from low to high, and then in the order of code domain resource index from low to high; or, The transmission resources in the fourth candidate transmission resource set are first indexed in order from low to high according to the resource block group index, then in order from low to high according to the comb index, then in order from low to high according to the RB set index, and then in order from low to high according to the code domain resource index.

144. The terminal device according to claim 141, characterized in that: The fourth candidate transmission resource set is determined based on the fifteenth parameter, including: One or more comb teeth that can be used to transmit the first PSFCH are determined based on the fifteenth parameter, and the one or more comb teeth constitute the fourth candidate transmission resource set.

145. The terminal device according to claim 144, characterized in that: The transmission resources in the fourth candidate transmission resource set are first indexed in the order of comb index from low to high, then in the order of resource block group index from low to high, and then in the order of code domain resource index from low to high; or, The transmission resources in the fourth candidate transmission resource set are first indexed in the order of resource block group index from low to high, then in the order of comb index from low to high, and then in the order of code domain resource index from low to high.

146. The terminal device according to claim 141, characterized in that: The fourth candidate transmission resource set is determined based on the fifteenth parameter, including: One or more resource block groups that can be used to transmit the first PSFCH are determined based on the fifteenth parameter, and the one or more resource block groups constitute the fourth candidate transmission resource set.

147. The terminal device according to claim 146, characterized in that: The transmission resources in the fourth candidate transmission resource set are first indexed in an ascending order of resource block group indexes and then in an ascending order of code domain resource indexes.

148. The terminal device according to any one of claims 141 to 147, characterized in that: The dedicated RB occupied by the first PSFCH is determined from the fourth candidate transmission resource set based on a sixteenth parameter, where the sixteenth parameter includes one or more of the following: The third parameter is determined based on the number of subchannels, the number of comb teeth, or the number of RBs included in the transmission resources of the first PSSCH; A fifth parameter is determined based on an index of an RB set corresponding to the transmission resource of the first PSSCH; A sixth parameter is determined based on the number of RB sets corresponding to the transmission resources of the first PSSCH; A seventh parameter is determined based on an index of a transmission opportunity corresponding to the first PSFCH; An eighth parameter is determined based on the total number of transmission opportunities corresponding to the first PSFCH; A ninth parameter is determined based on the first identification information, where the first identification information includes second identification information and / or third identification information, where the second identification information is determined based on a source identification included in the first SCI, where the first SCI is used to schedule a first PSSCH, and the third identification information is 0 or the third identification information is determined based on a member identification of the terminal device in the communication group; as well as A seventeenth parameter is determined based on the total number of resources of the fourth candidate transmission resource set; The first PSSCH is associated with the first PSFCH.

149. The terminal device according to claim 148, characterized in that: The dedicated RB occupied by the first PSFCH is determined from the fourth candidate transmission resource set based on a sixteenth parameter, including: Based on the sixteenth parameter, an index corresponding to the transmission resource of the first PSFCH is determined from the fourth candidate transmission resource set, and based on the index, a dedicated RB occupied by the first PSFCH is determined.

150. The terminal device according to claim 141, characterized in that: The dedicated RB occupied by the first PSFCH is determined from a fifth candidate transmission resource set, and the fifth candidate transmission resource set is determined from the fourth candidate transmission resource set.

151. The terminal device according to claim 150, characterized in that: The fifth candidate transmission resource set is determined from the fourth candidate transmission resource set based on an eighteenth parameter, where the eighteenth parameter includes one or more of the following: A seventh parameter is determined based on an index of a transmission opportunity corresponding to the first PSFCH; An eighth parameter is determined based on the total number of transmission opportunities corresponding to the first PSFCH; as well as The seventeenth parameter is determined based on the total number of resources in the fourth candidate transmission resource set.

152. The terminal device according to claim 150 or 151, characterized in that: The dedicated RB occupied by the first PSFCH is determined from the fifth candidate transmission resource set based on a nineteenth parameter, where the nineteenth parameter includes one or more of the following: The third parameter is determined based on the number of subchannels, the number of comb teeth, or the number of RBs included in the transmission resources of the first PSSCH; A fifth parameter is determined based on an index of an RB set corresponding to the transmission resource of the first PSSCH; A sixth parameter is determined based on the number of RB sets corresponding to the transmission resources of the first PSSCH; A ninth parameter is determined based on the first identification information, where the first identification information includes second identification information and / or third identification information, where the second identification information is determined based on a source identification included in the first SCI, where the first SCI is used to schedule a first PSSCH, and the third identification information is 0 or the third identification information is determined based on a member identification of the terminal device in the communication group; as well as The twentieth parameter is determined based on the total number of resources in the fifth candidate transmission resource set.

153. The terminal device according to claim 150 or 151, characterized in that: The fourth candidate transmission resource set is determined based on the fifteenth parameter, including: One or more RB sets that can be used to transmit the first PSFCH are determined based on the fifteenth parameter, and the one or more RB sets constitute the fourth candidate transmission resource set; The fifth candidate transmission resource set is determined from the fourth candidate transmission resource set based on the eighteenth parameter, including: One or more comb teeth that can be used to transmit the first PSFCH are determined from the fourth candidate transmission resource set based on the eighteenth parameter, and the one or more comb teeth constitute the fifth candidate transmission resource set.

154. The terminal device according to claim 153, characterized in that: The transmission resources in the fourth candidate transmission resources are first indexed in the order of RB set index from low to high, and then indexed in the order of comb index from low to high; or, The transmission resources in the fourth candidate transmission resources are first indexed in an ascending order according to the comb index, and then indexed in an ascending order according to the RB set index.

155. The terminal device according to claim 153 or 154, characterized in that: The transmission resources in the fifth candidate transmission resources are first indexed in the order of comb index from low to high, then in the order of resource block group index from low to high, and then in the order of code domain resource index from low to high; or, The transmission resources in the fifth candidate transmission resource are first indexed in the order of resource block group index from low to high, then in the order of comb index from low to high, and then in the order of code domain resource index from low to high.

156. The terminal device according to claim 151 or 152, characterized in that: The fourth candidate transmission resource set is determined based on the fifteenth parameter, including: One or more RB sets that can be used to transmit the first PSFCH are determined based on the fifteenth parameter, and the one or more RB sets constitute the fourth candidate transmission resource set; The fifth candidate transmission resource set is determined from the fourth candidate transmission resource set based on the eighteenth parameter, including: One or more resource block groups that can be used to transmit the first PSFCH are determined from the fourth candidate transmission resource set based on the eighteenth parameter, and the one or more resource block groups constitute the fifth candidate transmission resource set.

157. The terminal device according to claim 156, characterized in that: The transmission resources in the fourth candidate transmission resources are first indexed in the order of RB set index from low to high, then in the order of comb index from low to high, and then in the order of resource block group index from low to high; or, The transmission resources in the fourth candidate transmission resources are first indexed in the order of resource block group index from low to high, then in the order of comb index from low to high, and then in the order of RB set index from low to high; or, The transmission resources in the fourth candidate transmission resources are first indexed in the order of comb index from low to high, then in the order of RB set index from low to high, and then in the order of resource block group index from low to high; or, The transmission resources in the fourth candidate transmission resources are first indexed in the order of comb index from low to high, then in the order of resource block group index from low to high, and then in the order of RB set index from low to high.

158. The terminal device according to claim 156 or 157, characterized in that: The transmission resources in the fifth candidate transmission resources are first indexed in the order of resource block group index from low to high, and then indexed in the order of code domain resource index from low to high.

159. The terminal device according to claim 151 or 152, characterized in that: The fourth candidate transmission resource set is determined based on the fifteenth parameter, including: One or more comb teeth that can be used to transmit the first PSFCH are determined based on the fifteenth parameter, and the one or more comb teeth constitute the fourth candidate transmission resource set; The fifth candidate transmission resource set is determined from the fourth candidate transmission resource set based on the eighteenth parameter, including: One or more comb teeth that can be used to transmit the first PSFCH are determined from the fourth candidate transmission resource set based on the eighteenth parameter, and the one or more comb teeth constitute the fifth candidate transmission resource set.

160. The terminal device according to claim 159, characterized in that: The transmission resources in the fourth candidate transmission resources are indexed in the order of comb index from low to high.

161. The terminal device according to claim 159 or 160, characterized in that: The transmission resources in the fifth candidate transmission resources are first indexed in the order of comb index from low to high, then in the order of resource block group index from low to high, and then in the order of code domain resource index from low to high; or, The transmission resources in the fifth candidate transmission resource are first indexed in the order of resource block group index from low to high, then in the order of comb index from low to high, and then in the order of code domain resource index from low to high.

162. The terminal device according to claim 151 or 152, characterized in that: The fourth candidate transmission resource set is determined based on the fifteenth parameter, including: One or more comb teeth that can be used to transmit the first PSFCH are determined based on the fifteenth parameter, and the one or more comb teeth constitute the fourth candidate transmission resource set; The fifth candidate transmission resource set is determined from the fourth candidate transmission resource set based on the eighteenth parameter, including: One or more resource block groups that can be used to transmit the first PSFCH are determined from the fourth candidate transmission resource set based on the eighteenth parameter, and the one or more resource block groups constitute the fifth candidate transmission resource set.

163. The terminal device according to claim 162, characterized in that: The transmission resources in the fourth candidate transmission resources are first indexed in the order of comb index from low to high, and then indexed in the order of resource block group index from low to high; or, The transmission resources in the fourth candidate transmission resources are first indexed in the order of resource block group index from low to high, and then indexed in the order of comb tooth index from low to high.

164. The terminal device according to claim 162 or 163, characterized in that: The transmission resources in the fifth candidate transmission resources are first indexed in the order of resource block group index from low to high, and then indexed in the order of code domain resource index from low to high.

165. The terminal device according to claim 151 or 152, characterized in that: The fourth candidate transmission resource set is determined based on the fifteenth parameter, including: One or more resource block groups that can be used to transmit the first PSFCH are determined based on the fifteenth parameter, and the one or more resource block groups constitute the fourth candidate transmission resource set; The fifth candidate transmission resource set is determined from the fourth candidate transmission resource set based on the eighteenth parameter, including: One or more resource block groups that can be used to transmit the first PSFCH are determined from the fourth candidate transmission resource set based on the eighteenth parameter, and the one or more resource block groups constitute the fifth candidate transmission resource set.

166. The terminal device according to claim 165, characterized in that: The transmission resources in the fourth candidate transmission resources are indexed in order of resource block group index from low to high.

167. The terminal device according to claim 165 or 166, characterized in that: The transmission resources in the fifth candidate transmission resources are first indexed in the order of resource block group index from low to high, and then indexed in the order of code domain resource index from low to high.

168. The terminal device according to claim 155, 158, 161, 164 or 167, characterized in that: The transmission resources occupied by the first PSFCH are determined from the fifth candidate transmission resource set based on the nineteenth parameter, including: Based on the nineteenth parameter, an index corresponding to the transmission resource of the first PSFCH is determined from the fifth candidate transmission resource set, and based on the index, a dedicated RB occupied by the first PSFCH is determined.

169. The terminal device according to claims 90 to 168, characterized in that: In the case where the first terminal device determines the transmission resources of the second PSFCH, if the transmission resources of the first PSFCH and the transmission resources of the second PSFCH are located in the same RB set, the transmission resources of the first PSFCH and the transmission resources of the second PSFCH include the same common comb teeth.

170. The terminal device according to any one of claims 90 to 169, characterized in that: A first PSSCH is associated with the first PSFCH, transmission resources of the first PSSCH include a second RB set, and the determining unit is configured to: A transmission resource of the first PSFCH is determined within the second RB set.

171. The terminal device according to claim 170, characterized in that: The determining the transmission resource of the first PSFCH in the second RB set includes: Determine the transmission resource of the first PSFCH in the second RB set based on one or more of the following parameters: Index information corresponding to the second RB set; An index corresponding to the first subchannel, an index corresponding to the first comb tooth, or an index corresponding to the first RB of the transmission resource of the first PSSCH in the second RB set; the number of subchannels, the number of comb teeth, or the number of RBs included in the second RB set by the transmission resources of the first PSSCH; The timeslot index corresponding to the transmission resource of the first PSSCH; an index of a transmission opportunity corresponding to the first PSFCH; The total number of transmission opportunities corresponding to the first PSFCH; first identification information; Among them, the first identification information includes second identification information and / or third identification information, the second identification information is determined based on the source identification included in the first SCI, the first SCI is used to schedule the first PSSCH, and the third identification information is 0 or the third identification information is determined based on the member identification of the terminal device in the communication group.

172. The terminal device according to claim 170 or 171, characterized in that: The second RB set is the first RB set among one or more RB sets corresponding to the transmission resources of the first PSSCH.

173. The terminal device according to any one of claims 170 to 172, characterized in that: The transmission resource of the first PSSCH further includes a third RB set, and the determining unit is used to: A transmission resource of the first PSFCH is determined within the third RB set.

174. The terminal device according to claim 173, characterized in that: The determining the transmission resource of the first PSFCH in the third RB set includes: If the first terminal device has no PSFCH to be sent in the third RB set within the time domain resources corresponding to the first PSFCH transmission resources, the transmission resources of the first PSFCH are determined within the third RB set.

175. The terminal device according to any one of claims 170 to 172, characterized in that: If the transmission resources of the first PSSCH correspond to multiple RB sets, the first terminal device determines the transmission resources of the first PSFCH in the multiple RB sets respectively.

176. The terminal device according to any one of claims 170 to 172, characterized in that: The transmission resource of the first PSSCH further includes a third RB set, and the terminal device is further configured to: Determining a transmission resource of a third PSFCH within the third RB set; The transmission resources of the third PSFCH include common comb teeth in the third RB set, and the time domain resources of the third PSFCH and the first PSFCH are the same.

177. The terminal device according to claim 176, characterized in that: The determining the transmission resource of the third PSFCH in the third RB set includes: If the first terminal device has no PSFCH to be sent in the third RB set within the time domain resources corresponding to the first PSFCH transmission resources, the transmission resources of the third PSFCH are determined within the third RB set.

178. The terminal device according to claim 176 or 177, characterized in that: The terminal device is also used for: The first PSFCH and the third PSFCH are transmitted.

179. A terminal device, characterized in that: It comprises a memory and a processor, the memory is used to store programs, and the processor is used to call the programs in the memory so that the terminal device executes the method as described in any one of claims 1-89.

180. A device, characterized in that: It comprises a processor, which is used to call a program from a memory so that the device executes the method as described in any one of claims 1-89.

181. A chip, characterized in that: It comprises a processor, which is used to call a program from a memory so that a device equipped with the chip executes a method as described in any one of claims 1 to 89.

182. A computer-readable storage medium, characterized in that A program is stored thereon, the program causing a computer to execute the method according to any one of claims 1 to 89.

183. A computer program product, characterized in that It comprises a program which causes a computer to execute the method as claimed in any one of claims 1 to 89.

184. A computer program, characterized in that The computer program causes a computer to execute the method according to any one of claims 1 to 89.

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