Methods and terminal equipment for sidelink transmission

Abstract

The present invention provides a method and terminal equipment for sidelink transmission, the method comprising a first terminal equipment determining the transmission resources of a first PSFCH, the transmission resources of the first PSFCH including one or more of a common interlace occupied by the first PSFCH and a dedicated RB occupied by the first PSFCH. Based on this application, the first terminal equipment can determine the transmission resources of the PSFCH in the unlicensed spectrum based on the interlace structure. Thus, the present invention considers the interlace structure relating to the unlicensed spectrum when determining the resources of a sidelink feedback channel, thereby reconciling the requirements of the unlicensed spectrum with the needs for transmitting sidelink feedback information.

Description

[Technical Field]

[0001] This application claims priority to a PCT patent application filed on August 11, 2023, with application number PCT / CN2023 / 112650, and titled "Method and Terminal Equipment for Sidelink Transmission," the entirety of which is incorporated into this application by reference.

[0002] This application relates to the field of communications technology, and more specifically to a method and terminal equipment for sidelink transmission. [Background technology]

[0003] In some sidelink communication systems, a sidelink feedback channel is introduced to improve the reliability of sidelink communication. Taking unicast communication as an example, a transmitting terminal device can send sidelink data to a receiving terminal device, and the receiving terminal device can send sidelink feedback information to the transmitting terminal device. Here, the sidelink feedback information can be carried via a sidelink feedback channel.

[0004] With technological advancements, sidelink communication technology is being applied to unlicensed spectrums. However, how to determine the resources of the sidelink feedback channel in unlicensed spectrum communication remains unclear. [Overview of the project] [Means for solving the problem]

[0005] This application provides a method and terminal equipment for sidelink transmission. The various embodiments of this application are described below.

[0006] In a first embodiment, a method for sidelink transmission is provided. The method includes a first terminal device determining the transmission resources of a first physical sidelink feedback channel (PSFCH), the transmission resources of the first PSFCH including one or more of a common interlace occupied by the first PSFCH and a dedicated resource block (RB) occupied by the first PSFCH.

[0007] In a second embodiment, a terminal device is provided, which is a first terminal device, and the terminal device includes a determination unit configured to determine the transmission resources of a first PSFCH, the transmission resources of the first PSFCH include one or more of a common interlace occupied by the first PSFCH and a dedicated RB occupied by the first PSFCH.

[0008] In a third embodiment, a terminal device is provided, including a processor and memory, wherein the memory is configured to store one or more computer programs, and the processor is configured to call the computer programs in memory to cause the terminal device to perform some or all of the steps in the method of the first embodiment.

[0009] In a fourth aspect, an embodiment of the present application provides a communication system including the terminal equipment described above. In another possible design, the system may further include other equipment that interacts with the terminal equipment in the solution provided in the embodiment of the present application.

[0010] In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium for storing a computer program, the computer program causing a terminal device to perform some or all of the steps in the methods of each of the above aspects.

[0011] In a sixth aspect, an embodiment of the present application provides a computer program product. The computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a terminal device to execute some or all of the steps in the methods of the above aspects. In some embodiments, the computer program product may be a software installation package.

[0012] In a seventh aspect, an embodiment of the present application provides a chip including a memory and a processor. The processor can call and execute a computer program from the memory to implement some or all of the steps described in the methods of the above aspects.

[0013] Based on the present application, the first terminal device can determine the transmission resources of the PSFCH in the unlicensed spectrum based on the interleaving structure. Therefore, when determining the resources of the sidelink feedback channel, the present application takes into account the interleaving structure related to the unlicensed spectrum, thereby reconciling the requirements of the unlicensed spectrum and the needs of transmitting sidelink feedback information.

Brief Description of the Drawings

[0014] [Figure 1] It is an exemplary diagram of the system architecture of a wireless communication system to which an embodiment of the present application can be applied. [Figure 2] It is an exemplary diagram of a scenario of sidelink communication within network coverage. [Figure 3] It is an exemplary diagram of a scenario of sidelink communication in partial network coverage. [Figure 4] It is an exemplary diagram of a scenario of sidelink communication outside network coverage. [Figure 5] It is an exemplary diagram of a scenario of sidelink communication based on a central control node. [Figure 6]This is an illustrative diagram of a broadcast-based sidelink communication method. [Figure 7] This is an illustrative diagram of a side-link communication scheme based on unicast. [Figure 8] This is an example diagram of a multicast-based sidelink communication scheme. [Figure 9] This is an example diagram illustrating the transmission of sidelink feedback information in unicast communication. [Figure 10] This is a schematic diagram of the time slot structure for sidelink communication. [Figure 11] This is an example diagram of a PSFCH feedback loop with a period of 4. [Figure 12] This is an illustrative diagram showing the correspondence between PSFCH transmission resource subsets and PSSCH transmission resources. [Figure 13] This is an example diagram of the PSFCH resource index. [Figure 14] This is a schematic diagram of the RB set. [Figure 15] This is an example diagram of a resource configuration based on interlacing. [Figure 16] This is an example diagram of a frame structure. [Figure 17] This is an example diagram of a different frame structure. [Figure 18] This is an example diagram showing the time slot positions corresponding to PSFCH transmission opportunities. [Figure 19] This is a schematic flowchart of the method for sidelink transmission according to the embodiment of this application. [Figure 20] This is a schematic diagram of the frequency domain resources for one PSFCH transmission opportunity. [Figure 21] This is an illustrative diagram of the transmission resources of the first PSFCH and the third PSFCH according to the embodiment of this application. [Figure 22] This is a schematic structural diagram of the terminal device 2200 according to the embodiment of this application. [Figure 23] This is a schematic structural diagram of a communication device according to an embodiment of this application. [Modes for carrying out the invention]

[0015] The technical solutions in this application will be described below with reference to the drawings.

[0016] Regarding communication system architecture Figure 1 is an illustrative diagram of the 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 terminal devices 120. The network device 110 may be a device that communicates with the terminal devices 120. The network device 110 can provide communication coverage to a specific geographic area and can communicate with terminal devices 120 located within that coverage area.

[0017] Figure 1 illustrates one network device and two terminal devices. Optionally, the wireless communication system 100 may include one or more network devices 110 and / or one or more terminal devices 120. With respect to one network device 110, all of the terminal devices 120 may be located within the network coverage area of ​​the network device 110, all may be located outside the network coverage area of ​​the network device 110, some may be within the coverage area of ​​the network device 110 and others outside the network coverage area of ​​the network device 110, and are not limited to the embodiments of this application.

[0018] Optionally, the wireless communication system 100 may further include other network entities such as a network controller or a mobility management entity, but is not limited to the embodiments of this application.

[0019] The technical solutions of the embodiments of this application can be applied to various communication systems, such as 5th generation (5G) systems, new radio (NR), long-term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD) systems, and the like. The technical solutions provided in this application can also be applied to future communication systems such as 6th generation mobile communication systems and satellite communication systems.

[0020] In the embodiments of this application, terminal equipment may also be called user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), mobile terminal (MT), remote station, remote terminal equipment, mobile device, user terminal, wireless communication equipment, user agent, or user device. In the embodiments of this application, terminal equipment may refer to equipment that provides voice and / or data connectivity to a user and may be used to connect people, things, and machines, such as handheld devices with wireless connectivity, in-vehicle equipment, etc. The terminal devices in the embodiments of this application may include mobile phones, tablet computers (Pads), laptop computers, PDAs, mobile internet devices (MIDs), wearable devices, vehicles, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, or wireless terminals in smart homes. For example, a terminal device can function as a scheduling entity and provide sidelink signals between terminal devices in vehicle-to-everything (V2X) or device-to-device (D2D) communication. For example, a cellular phone and a car communicate with each other using sidelink signals, and a cellular phone and smart home devices communicate without relaying communication signals via a base station. Optionally, a terminal device can function as a base station.

[0021] The network equipment in the embodiments of this application may be equipment for communicating with terminal equipment, and such network equipment may also be called access network equipment or wireless access network equipment, and for example, the network equipment may be a base station. The network equipment in the embodiments of this application may refer to a radio access network (RAN) node (or equipment) that connects terminal equipment to a wireless network. The term "base station" broadly covers, or can be replaced by, various 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, radio 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), and positioning node. A base station may also be a macro base station, micro base station, relay node, donor node, or a combination thereof. A base station may further refer to a communication module, modem, or chip configured within the aforementioned equipment or device. A base station may also be a mobile switching center, equipment performing base station functions in inter-device D2D, V2X, or machine-to-machine (M2M) communication, network-side equipment in a 6G network, or equipment performing base station functions in a future communication system.Base stations may support networks with the same or different access technologies. The embodiments of this application do not limit the specific technologies and specific equipment configurations used by network equipment.

[0022] Base stations may be fixed or mobile. For example, a helicopter or drone may be configured as a mobile base station, and one or more cells may move based on the location of the mobile base station. In another example, a helicopter or drone may be configured as equipment to communicate with another base station.

[0023] In some configurations, the network equipment in the embodiments of this application may refer to a CU or a DU, or the network equipment may include both a CU and a DU. The gNB may further include an AAU.

[0024] Network equipment and terminal equipment can be located indoors or outdoors, on land including handheld or vehicle-mounted, on water, or in the air on airplanes, balloons, and satellites. The embodiments of this application do not limit the scenarios in which network equipment and terminal equipment are located.

[0025] Sidelink communication under different network coverage conditions Sidelink communication refers to communication technology based on sidelink (SL: sidelink, also called direct link). Sidelink communication can be, for example, device-to-device (D2D) or vehicle-to-everything (V2X) communication. In conventional cellular systems, communication data is received or transmitted between terminal devices and network devices, but sidelink communication supports the direct transmission of communication data between terminal devices. Compared to conventional cellular communication, direct transmission of communication data between terminal devices can have higher spectral efficiency and lower transmission delay. For example, vehicle-to-vehicle systems employ sidelink communication technology.

[0026] In sidelink communication, sidelink communication can be divided into sidelink communication within network coverage, sidelink communication with partial network coverage, and sidelink communication outside of network coverage, based on the network coverage status of the terminal device.

[0027] Figure 2 is an illustrative diagram of a sidelink communication scenario within network coverage. In the scenario shown in Figure 2, both terminal devices 120a are within the coverage range of network device 110. Therefore, both terminal devices 120a can receive the configuration signaling of network device 110 (configuration signaling can also be replaced with configuration information in this application) and determine the configuration of the sidelink based on the configuration signaling of network device 110. After both terminal devices 120a have configured the sidelink, they can perform sidelink communication over the sidelink.

[0028] Figure 3 is an example diagram of a sidelink communication scenario with partial network coverage. In the scenario shown in Figure 3, terminal devices 120a and 120b communicate via sidelink. Since terminal device 120a is located within the coverage range of network device 110, terminal device 120a can receive the configuration signaling from network device 110 and determine the sidelink configuration based on the network device 110's configuration signaling. Terminal device 120b is located outside the network coverage range and therefore cannot receive the configuration signaling from network device 110. In this case, terminal device 120b can determine the sidelink configuration based on pre-configuration information and / or information carried on the physical sidelink broadcast channel (PSBCH) transmitted from terminal device 120a, which is within the network coverage range. After both terminal devices 120a and 120b have configured the sidelink, they can communicate via sidelink.

[0029] Figure 4 is an illustrative diagram of a sidelink communication scenario outside of network coverage. In the scenario shown in Figure 4, both terminal devices 120b are outside the network coverage range. In this case, both terminal devices 120b can determine the configuration of a sidelink based on pre-configured information. After both terminal devices 120b have configured a sidelink, they can perform sidelink communication over the sidelink.

[0030] Regarding side-link communication based on a central control node Figure 5 is an illustrative diagram of a sidelink communication scenario based on a central control node. In this sidelink communication scenario, multiple terminal devices can form a single communication group, which has a central control node. The central control node may be one of the terminal devices in the communication group (for example, terminal device 1 in Figure 5), which may also be called a cluster header (CH) terminal device. The central control node may be responsible for performing one or more of the following functions: establishing the communication group, adding and removing group members from the communication group, coordinating resources within the communication group, allocating sidelink transmission resources to other terminal devices, receiving sidelink feedback information from other terminal devices, and coordinating resources with other communication groups.

[0031] About Sidelink communication modes Some standards or protocols (such as the 3rd Generation Partnership Project (3GPP®)) define two modes of sidelink communication: Mode 1 and Mode 2.

[0032] In the first mode, resources (which may also be called transmission resources, such as time-frequency resources, as described in this application) are allocated to the terminal device by the network device. The terminal device can transmit data over the sidelink based on the resources allocated by the network device. The network device may allocate resources to the terminal device for one-time transmission or for semi-static transmission. The first mode can be applied to scenarios with network device coverage, such as the scenario shown in Figure 2 above. In the scenario shown in Figure 2, since the terminal device 120a is located within the network coverage range of the network device 110, the network device 110 can allocate resources to the terminal device 120a that will be used in the sidelink transmission process.

[0033] In the second mode, terminal devices can autonomously select one or more resources from the resource pool (RP). The terminal devices can then perform sidelink transmission based on the selected resources. For example, in the scenario shown in Figure 4, terminal device 120b is outside the cell coverage range. Therefore, terminal device 120b can autonomously select resources from a pre-configured resource pool and perform sidelink transmission. Alternatively, in the scenario shown in Figure 2, terminal device 120a can also autonomously select one or more resources from the resource pool configured by network device 110 and perform sidelink transmission.

[0034] Regarding the data transmission method for sidelink communication Some side-link communication systems (for example, Long Term Evolution Vehicle to Everything (LTE-V2X)) support broadcast-based data transmission (hereinafter abbreviated as broadcast transmission). In broadcast transmission, the receiving terminal can be any one terminal device in the vicinity of the transmitting terminal. Using Figure 6 as an example, terminal device 1 is the transmitting terminal, and the receiving terminal corresponding to this transmitting terminal is any one terminal device in the vicinity of terminal device 1, which could be, for example, terminal devices 2 to 6 in Figure 6.

[0035] In addition to broadcast transmission, some communication systems further support unicast-based data transmission methods (hereinafter abbreviated as unicast transmission) and / or multicast-based data transmission methods (hereinafter abbreviated as multicast transmission). For example, New Radio Vehicle to Everything (NR-V2X) aims to support autonomous driving. Autonomous driving places higher demands on data interaction between vehicles. For example, data interaction between vehicles requires higher throughput, lower latency, higher reliability, wider coverage, and more flexible resource allocation methods. Therefore, to improve the performance of data interaction between vehicles, NR-V2X introduces unicast and multicast transmission.

[0036] For unicast transmission, the receiving terminal typically has only one terminal device. As an example, Figure 7 shows unicast transmission being performed between terminal device 1 and terminal device 2. Terminal device 1 may be the transmitting terminal and terminal device 2 may be the receiving terminal, or terminal device 1 may be the receiving terminal and terminal device 2 may be the transmitting terminal.

[0037] For multicast transmission, the receiving terminal may be a terminal device within a single communication group, or it may be a terminal device within a certain transmission distance. As an example in Figure 8, terminal devices 1, 2, 3, and 4 constitute a single communication group. When terminal device 1 transmits data, any of the other terminal devices in the group (terminal devices 2 to 4) can be receiving terminals.

[0038] About side link feedback channels In some sidelink communication systems (such as NR-V2X systems), a sidelink feedback channel is introduced to improve the reliability of sidelink communication. Figure 9 illustrates unicast communication as an example, where the transmitting terminal equipment can send sidelink data (which may include, for example, a physical sidelink control channel (PSCCH) and / or a physical sidelink shared channel (PSSCH)) to the receiving terminal equipment. The receiving terminal equipment can send sidelink feedback information to the transmitting terminal equipment. The sidelink feedback information may be carried on a sidelink feedback channel (such as a PSFCH). The sidelink feedback information may include hybrid automatic repeat request (HARQ) feedback information. The HARQ feedback information may include an acknowledgment (ACK) or a negative acknowledgment (NACK). The transmitting terminal equipment can determine whether retransmission is necessary based on the sidelink feedback information.

[0039] Sidelink feedback may be activated or deactivated via pre-configured information or network configuration information, or it may be activated or deactivated by the transmitting terminal device. When sidelink feedback is activated, the receiving terminal device receives sidelink data transmitted from the transmitting terminal device and feeds back sidelink feedback information to the transmitting device based on the detection result. Based on the received sidelink feedback information, the transmitting terminal device decides whether to transmit retransmitted data or new data. When sidelink feedback is deactivated, the receiving terminal device does not need to transmit sidelink feedback information, and the transmitting terminal device can transmit data in a blind retransmission manner. For example, the transmitting terminal device can transmit each sidelink data K times without deciding whether to transmit retransmitted data based on the sidelink feedback information transmitted from the receiving terminal device.

[0040] Regarding the format of the side link feedback channel As mentioned above, some sidelink communication systems incorporate sidelink feedback channels to carry sidelink feedback information. Below, we will explain sidelink feedback channels using PSFCH as an example.

[0041] In some sidelink communication systems (such as NR-V2X systems), the PSFCH carries only one bit of HARQ-ACK information. This HARQ-ACK information occupies two time-domain symbols in the time domain, where the second symbol carries sidelink feedback information. The data in the first symbol is a copy of the data in the second symbol. The first symbol is typically used by the receiver as automatic gain control (AGC). This HARQ-ACK information occupies one RB in the frequency domain. In a single time slot, the structure of the PSFCH and PSSCH / PSCCH may be as shown in Figure 10. Figure 10 schematically shows the positions of the time-domain symbols occupied by the PSFCH, PSCCH, and PSSCH in a single time slot. In a time slot, the last symbol is used as the guard period (GP), the second-to-last symbol is used for PSFCH transmission, the data of the third-to-last symbol is the same as the data of the PSFCH symbol and is used as AGC, and the fourth-to-last symbol is also used as a GP. The first symbol in a time slot is used as AGC, and the data of this symbol is the same as the data of the second time-domain symbol in that time slot. In that time slot, PSCCH occupies three time-domain symbols, and the remaining symbols may be used for PSSCH transmission.

[0042] Resources for the sidelink feedback channel To reduce the overhead of the PSFCH channel, we define that one time slot contains a PSFCH transmission resource for every P time slots, i.e., the period of the sidelink feedback resource is P time slots. Here, P can satisfy P={1,2,4}. The parameter P can be a preset or set by the network.

[0043] Figure 11 is an illustrative diagram of PSFCH feedback when P=4. As shown in Figure 11, the minimum time interval between a PSSCH and its associated PSFCH is two time slots. Therefore, for PSSCH transmitted in time slots 3, 4, 5, and 6, all of its feedback information is transmitted in time slot 8. For PSSCH transmitted in time slots 7, 8, 9, and 10, all of its feedback information is transmitted in time slot 12. In Figure 11, time slots {3, 4, 5, 6} can be considered as one time slot set, and {7, 8, 9, 10} as another time slot set. The PSFCH corresponding to the PSSCH transmitted in each time slot within a 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 they are contained in a single time slot, and does not represent the last GP symbol in the time slot.

[0044] The following explains how side-link feedback resources are determined in related technologies, using the NR-V2X system as an example.

[0045] Sidelink feedback resources can be determined based on the time slot and subchannel information where the PSSCH is located, source ID information, and target ID information. Specifically, the PSFCH transmission resource set is divided into multiple subsets based on the PSFCH period parameter and the number of subchannels available for PSSCH transmission in the resource pool configuration information. Each PSFCH transmission resource within a subset corresponds to a PSSCH transmission of one time slot and one subchannel. Furthermore, specific PSFCH transmission resources are determined within that subset based on source ID information and target ID information.

[0046] For one resource pool, let the PSFCH period be P (determined by, for example, the parameter sl-PSFCH-Period), and the parameter

number

number

[0047]

number

[0048]

number

number

[0049] These RBs constitute a subset of PSFCH transmission resources. Figure 12 is an illustrative diagram of the correspondence between the PSFCH transmission resource subset and the PSSCH transmission resources. As shown in Figure 12, the period of a PSFCH consists of four time slots, that is, one PSFCH time slot corresponds to four PSSCH time slots. The resource pool contains two subchannels. The resource pool configuration information includes 16 RBs for transmitting the PSFCH. Therefore, one subchannel in one time slot corresponds to two PSFCH RBs. The correspondence between PSSCH subchannels and PSFCH RBs follows the order that the time domain comes first, followed by the frequency domain. As shown in Figure 12, subchannel 0 of time slot 0 corresponds to PSFCH RB0 and RB1, and subchannel 0 of time slot 1 corresponds to PSFCH RB2 and RB3, and so on.

[0050] The number of PSFCHs that can be code-divided and multiplexed (CDM) in a single RB is determined by the parameter

number

[0051] NR-V2X introduces two methods for determining PSFCH transmission resources based on PSSCH transmission resources, and the choice of method may be indicated by resource pool configuration parameters. In the first method, PSFCH transmission resources are determined based on the starting subchannel index occupied by the PSSCH. In the second method, PSFCH transmission resources are determined based on the indices of all subchannels occupied by the PSSCH.

[0052] The transmission resource set for a PSFCH corresponding to one PSSCH channel is as follows:

[0053]

number

number

number

number

number

number

[0054]

number

[0055] About the unlicensed spectrum Unlicensed spectrum is a spectrum that is divided by country and region for use in radio equipment communications. This spectrum is generally considered a shared spectrum, meaning that communication equipment can use it without applying for a license for a dedicated spectrum from a national or regional spectrum management authority, provided that it meets the legal requirements set forth by the country or region. Unlicensed spectrum may also be called shared spectrum, unlicensed spectrum, unlicensed frequency band, or license-exempt frequency band.

[0056] The use of unlicensed spectrum must comply with specific national and regional legal requirements. For example, communication equipment can use unlicensed spectrum by accessing channels through channel monitoring to avoid collisions with other communication equipment or other communication systems (such as WiFi systems). One implementation is that communication equipment can use unlicensed spectrum according to the listen before talk (LBT) principle. That is, communication equipment must first perform channel monitoring before transmitting a signal on an unlicensed spectrum channel, and can only transmit a signal if the channel monitoring result indicates that the channel is idle. If the channel monitoring result of communication equipment on an unlicensed spectrum channel indicates that the channel is busy, the communication equipment cannot transmit a signal. To ensure fairness, the duration for which communication equipment transmits a signal using an unlicensed spectrum channel in a single transmission must not exceed the maximum channel occupancy time (MCOT).

[0057] 3GPP Rel-16 considers NR-based access to unlicensed spectrum (NR-U). NR-U can include both Type 1 and Type 2 LBT (Luminous Beam Technique) methods. The following sections will describe each LBT method separately.

[0058] About the Type 1 LBT method The LBT method of Type 1 is a multi-slot channel detection with random backoff that is adjusted based on the size of the contention window. Based on the channel access priority p, the communication device can start channel occupancy with a length of Tmcot (for example, equal to the time length of MCOT). For example, when the base station uses the LBT method of Type 1, after channel access, the base station can not only transmit the data of the base station but also share the COT with the terminal device. Or, when the terminal device uses the LBT method of Type 1, after channel access, the terminal device can not only transmit the data of the terminal device but also share the COT with the base station. Table 1 shows the channel access priority and the corresponding channel access parameters when the terminal device executes the LBT of Type 1.

[0059]

Table 1

[0060] It should be noted that in Table 1, m p refers to the number of backoff 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 minimum value of CW p corresponding to the channel access priority p, CW max,p refers to the maximum value of CW p corresponding to the channel access priority p, and T mcot,p refers to the maximum channel occupancy time length corresponding to the channel access priority p.

[0061] It should be noted that among the four channel access priorities of Type 1 in NR-U, p = 1 has the highest priority.

[0062] Regarding the LBT method of Type 2 Type 2 LBT is a channel access method based on fixed-length channel listening time slots. Type 2 LBT can include Type 2A, Type 2B, and Type 2C LBT methods.

[0063] In the Type 2A LBT scheme, the communication device can perform a 25μs single-time slot detection of a channel, meaning that channel detection is initiated 25μs before data transmission begins. The 25μs detection can include one 16μs detection and one 9μs detection, and if all channels are idle, the communication device can consider the channels idle and access them.

[0064] In the Type 2B LBT scheme, communication equipment can perform channel detection in single-time slots with a fixed length of 16 μs. If terminal equipment detects idle time of 4 μs or more within the last 9 μs, the channel can be considered idle.

[0065] In the Type 2C LBT method, communication equipment can transmit data directly without channel detection. If the time difference between the current transmission and the previous transmission is less than 16 μs, they can be considered the same transmission, and the transmission time of the current transmission must not exceed 584 μs.

[0066] Sidelink unlicensed spectrum (SL-U) communication systems can also support channel access mechanisms similar to those described above, such as Type 1, Type 2A, Type 2B, and Type 2C channel access types.

[0067] About resource block sets (RB set: resourceblock set) The SL-U system can configure a resource pool on the unlicensed spectrum based on pre-configured information or network configuration information in order to perform sidelink transmission. In some embodiments, the resource pool includes M1 resource block sets (i.e., RB sets), where each resource block set includes M2 resource blocks, and M1 and M2 are positive integers. In some embodiments, each resource block set may correspond to a channel in the unlicensed spectrum, or to the smallest frequency domain granularity for LBT, or to an LBT subband.

[0068] For example, the bandwidth corresponding to a channel in one unlicensed spectrum is 20 MHz, which means the bandwidth corresponding to one resource block set is also 20 MHz. Alternatively, the bandwidth of a channel in one unlicensed spectrum is 20 MHz, corresponding to M3 RBs, where M3 RBs are all the RBs contained in one channel, or all the RBs available for data transmission within one channel. M3 is a positive integer. For example, if M3 = 100 (corresponding to a subcarrier interval of 15 kHz), then one resource block set also corresponds to 100 RBs, i.e., M2 = 100.

[0069] As another example, in unlicensed spectra, it is necessary to determine whether the unlicensed spectrum can be used based on the results of LBT. If the minimum frequency domain granularity for LBT is 20 MHz, then one resource block set corresponds to the number of RBs contained in 20 MHz. Alternatively, if one resource block set contains M² = 100 RBs (corresponding to a subcarrier interval of 15 kHz), then the minimum frequency domain granularity of LBT is the number of RBs contained in one resource block set, i.e., 100 RBs.

[0070] It should be noted that the resource block set may also be called a channel or LBT subband, but is not limited to the embodiments of this application.

[0071] In a sidelink communication system on an unlicensed spectrum, a resource pool can contain an integer number of resource block sets.

[0072] In some embodiments, the frequency domain start position of the resource pool may be the same as the frequency domain start position of the first resource block set within the M1 resource block sets, where the first resource block set is the resource block set with the lowest frequency domain position within the M1 resource block sets.

[0073] 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 within the M1 resource block sets, where the second resource block set is the resource block set with the highest frequency domain position within the M1 resource block sets.

[0074] For example, the resource pool contains M1=3 resource block sets, and the indices of the corresponding resource block sets are resource block set 0, resource block set 1, and resource block set 2, respectively. Here, 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 start position of the resource pool is the same as the frequency domain start position of resource block set 0, or the frequency domain start position of the resource pool is determined based on the frequency domain start position of resource block set 0. The frequency domain end position of the resource pool is the same as the frequency domain end position of resource block set 2, or the frequency domain end position of the resource pool is determined based on the frequency domain end position of resource block set 2.

[0075] In some embodiments, a guard band (GB) is included between two adjacent resource block sets within the M1 resource block sets contained in the resource pool.

[0076] In some embodiments, the frequency domain start position and frequency domain size of the guard band are determined based on pre-configured information or network configuration information. The terminal acquires 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 isolate resource block sets.

[0077] For example, this can be understood by referring to Figure 14. As shown in Figure 14, three guard bands are set up within the sidelink bandwidth part (BWP), corresponding to guard band 0, guard band 1, and guard band 2, respectively. These three guard bands isolate four resource block sets. Based on the frequency domain start position of the sidelink BWP (i.e., the starting point of the sidelink BWP shown in Figure 14), the frequency domain start position of each guard band (i.e., the starting point of the guard bands shown in Figure 14), and the frequency domain size of the guard bands (i.e., the length of the guard bands shown in Figure 14), the start and end positions of the frequency domain of each resource block set can be determined. As shown in Figure 14, one sidelink resource pool is set up within the sidelink BWP. This sidelink resource pool includes three resource block sets, from resource block set 0 to resource block set 2. Therefore, the frequency domain start position of the resource pool (i.e., the starting point of the resource pool shown in Figure 14) corresponds to the frequency domain start position of resource block set 0, and the frequency domain end position of the resource pool (i.e., the ending point of the resource pool shown in Figure 14) corresponds to the frequency domain end position of resource block set 2.

[0078] In some embodiments, a single resource block set may include multiple interlaces. For example, each resource block set in Figure 14 may include multiple interlaces.

[0079] In some embodiments, a single PSSCH may be transmitted over one or more resource block sets. In yet another embodiment, a single PSSCH may be transmitted over one or more resource block sets, and the PSSCH may occupy one or more interlaces within that 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 15 kHz, one resource block set contains 100 RBs, corresponding to 10 interlaces, i.e., interlace 0 to interlace 9. A single PSSCH may be transmitted over one resource block set. Furthermore, the PSSCH may occupy some or all of the interlace resources within a single resource block set. For example, PSSCH1 may be transmitted over resource block set 0, and PSSCH1 occupies all the interlace resources within resource block set 0. That is, PSSCH1 occupies the resources corresponding to interlace 0 to interlace 9 within resource block set 0. As another example, PSSCH2 may be transmitted in resource block set 1, and PSSCH2 will occupy two interlace resources in resource block set 1, for example, PSSCH2 will occupy the resources corresponding to interlace 0 and interlace 1 in resource block set 1. PSSCH3 may be transmitted in resource block set 1 and resource block set 2, and PSSCH3 will occupy three interlace resources in these two resource block sets, for example, PSSCH3 will occupy the resources corresponding to interlace 3, interlace 4, and interlace 5 in resource block set 1 and resource block set 2, respectively.

[0080] About interlaced structures Communicating in unlicensed frequency bands typically requires meeting corresponding regulatory requirements. For example, when terminal equipment communicates using unlicensed frequency bands, the frequency band range occupied by the terminal equipment must be at least 80% of the system bandwidth (i.e., the regulatory requirement for occupied channel bandwidth (OCB)). Therefore, to allow as many users as possible to access the channel at the same time, some unlicensed spectral communication systems (such as NR-U systems) define interlacing-based resource configuration schemes. For example, one interlace contains N RBs, where N can be a positive integer. The RBs contained in one interlace may also be called interlaced resource blocks (IRBs). The RBs contained in one interlace are distributed at equal intervals within the frequency domain. If the frequency band range contains a total of M interlaces, the RBs contained in the m-th interlace could be {m, M+m, 2M+m, 3M+m, ...}.

[0081] Figure 15 is an illustrative diagram of a resource configuration based on interlacing. As shown in Figure 15, the system bandwidth includes 30 RBs and 5 interlaces (i.e., M=5). Each interlace contains 6 RBs (i.e., N=6). The frequency domain spacing between two adjacent RBs within one interlace is the same, i.e., the spacing is 5 RBs.

[0082] Interlace structure in unlicensed spectrum sidelink communication systems In an SL-U system, when adopting an interlace-based resource allocation granularity, channels such as PSCCH, PSSCH, and PSFCH are all based on an interlace structure. In this case, the frame structure of the communication system may be as shown in Figures 16 and 17. Here, the numbers in the boxes in Figures 16 and 17 represent the interlace index. RBs with the same interlace index belong to the same interlace resource.

[0083] Figure 16 is an illustrative frame structure in which the time slot contains PSCCH and PSSCH, but does not contain PSFCH. Figure 17 is an illustrative frame structure in which the time slot contains PSCCH, PSSCH, and PSFCH. The bandwidth shown in Figures 16 and 17 contains 20 RBs, with 5 interlaced resources configured, i.e., M=5, and each interlaced resource contains 4 RBs. In Figure 16, the system is configured so that PSCCH occupies one interlaced resource and occupies two orthogonal frequency division multiplexing (OFDM) symbols in the time domain. PSSCH has interlace as its granularity. The first symbol in the time slot is an AGC symbol, and the data in the first symbol may be a repetition of the data in the second symbol. The last symbol in the time slot is a GP symbol. In Figures 16 and 17, PSSCH1 occupies interlace #0 and interlace #1, and its corresponding PSCCH1 occupies interlace #0. PSSCH2 occupies interlace #2, and the corresponding PSCCH2 also occupies interlace #2. In Figure 17, PSFCH0 occupies interlace #0 and one RB within interlace #2 (RB#2 shown in Figure 17).

[0084] For the sake of brevity, Figures 16 and 17 do not show the resources occupied by the second-stage SCI, the PSCCH demodulation reference symbol (DMRS), and the resources occupied by the PSCCH DMRS.

[0085] Regarding the PSFCH channel structure in the SL-U system In the SL-U system, the following channel structure can be used for the PSFCH channel. Transmission of the first PSFCH can occupy one common interlace (hereinafter referred to as the common interlace) and K3 dedicated RBs. These K3 dedicated RBs belong to the same interlace. The value of K3 can include, for example, {1, 2, 5}. It should be noted that the interlace to which the K3 dedicated RBs belong (hereinafter referred to as the dedicated interlace) may be different from the common interlace.

[0086] In the embodiments of this application, K3 dedicated RBs occupied by the first PSFCH are referred to as resource block groups. When K3 = 1, it can be understood that one resource block group contains one RB, in which case the resource block group index may also be called the RB index.

[0087] Understandably, the common interlacing occupied by PSFCH transmissions can satisfy the requirements of OCB regulations. Different PSFCH transmissions can correspond to three different dedicated RBs. Dedicated RBs not only ensure sufficient PSFCH transmission resources but also avoid interference between different PSFCHs.

[0088] Continuing to refer to Figure 17, in Figure 17, one PSFCH occupies one common interlaced resource and one dedicated RB. As an example, with the first PSFCH being PSFCH0, as shown in Figure 17, PSFCH0 occupies common interlace #0 and one dedicated RB in interlace #2 (RB#2 shown in Figure 17). That is, in the case of PSFCH0, K3=1. The index of RB#2 can be used as the resource block group index occupied by the first PSFCH.

[0089] PSFCH transmission opportunities In the SL-U system, to overcome the problem of PSFCH transmission being impossible due to LBT failure, a mechanism is supported that sets up N transmission opportunities for a single PSFCH. Here, N can be a positive integer. For example, N can satisfy N=1, 2, 3, 4. For example, for a single PSSCH, the receiving terminal device determines the corresponding PSFCH transmission resource based on the PSSCH. In 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 that PSFCH transmission opportunity. If the LBT fails, the terminal device cannot transmit the PSFCH and needs to further determine whether it can transmit the PSFCH in the next PSFCH transmission opportunity based on the LBT result.

[0090] If the time slot in which a PSFCH is located is n, and four transmission opportunities are set for one PSFCH, i.e., N=4, then these four PSFCH transmission opportunities correspond to time slots n+k1, n+k2, n+k3, and n+k4, respectively. Here, k1, k2, k3, and k4 are positive integers and take on different values, meaning that the multiple transmission opportunities corresponding to a PSFCH are each located in different time slots. For example, if the PSFCH transmission resource is periodic, then the four transmission opportunities corresponding to a PSFCH each correspond to transmission time slots of the PSFCH within different periods.

[0091] Figure 18 is an illustrative diagram of the time slot positions corresponding to PSFCH transmission opportunities. As shown in Figure 18, for a PSSCH transmitted in time slot 1, the first transmission opportunity for the corresponding PSFCH 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 transmission opportunity for the corresponding PSFCH is in time slot 8. As can be seen from the above, it may be necessary to perform two PSFCH transmissions in the PSFCH transmission opportunity corresponding to time slot 8.

[0092] The applicant of this application has found that the prior art, when determining PSFCH transmission resources, only considers technical solutions for how to satisfy the requirement that one PSFCH occupies one RB, and does not consider the aforementioned requirement for unlicensed spectrum. For example, when the PSFCH has interlaced granularity, the method for determining PSFCH resources proposed in the prior art is not applicable. Therefore, the technical solutions for determining PSFCH transmission resources in the prior art are difficult to apply to license-exempt sidelink communication systems.

[0093] Figure 19 is a schematic diagram of a method for sidelink transmission according to an embodiment of the present application to solve the above problems. The method shown in Figure 19 may be performed by a first terminal device. The method shown in Figure 19 may include step S1910.

[0094] In step S1910, the first terminal device determines the transmission resources of the first PSFCH.

[0095] The first terminal device can perform sidelink communication with other terminal devices on the unlicensed spectrum. The first terminal device may be a terminal device that transmits the first PSFCH, or a terminal device that receives the first PSFCH.

[0096] The first PSFCH may be used to carry sidelink feedback information corresponding to sidelink data. For example, the first PSFCH may be associated with the first PSSCH. That is, the sidelink feedback information corresponding to the first PSSCH may be carried by the first PSFCH.

[0097] The transmission resources of the first PSFCH may include one or more common interlaces and dedicated RBs occupied by the first PSFCH.

[0098] In some embodiments, the first terminal device determining the transmission resources of the first PSFCH includes determining the dedicated RB that will be occupied by the first PSFCH.

[0099] In some embodiments, the first terminal device determining the transmission resources of the first PSFCH includes determining the common interlace to be occupied by the first PSFCH.

[0100] In some embodiments, the first terminal device determining the transmission resources of the first PSFCH includes determining the dedicated RB and common interlace to be occupied by the first PSFCH.

[0101] Based on this application, the first terminal device can determine the transmission resources of the PSFCH in the unlicensed spectrum based on the interlace structure. Therefore, this application considers the interlace structure relating to the unlicensed spectrum when determining the resources of the sidelink feedback channel, thereby reconciling the requirements of the unlicensed spectrum with the needs for transmitting sidelink feedback information.

[0102] The following explains how the transmission resources for the first PSFCH are determined.

[0103] It should be explained 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 describe a method for determining frequency-domain resources or code-domain resources, or a method for determining both frequency-domain resources and code-domain resources. This application does not limit the method for determining time-domain resources.

[0104] Common interlacing can be interlacing shared across multiple PSFCH transmissions. For example, if a first terminal device determines the transmission resources for a second PSFCH, and the transmission resources for the first and second PSFCHs are located within the same RB set, then the transmission resources for the first and second PSFCHs may contain the same common interlacing.

[0105] In some embodiments, common interlacing may be determined based on one or more of the following: protocol predefined information, preconfigured information, network device configuration information, and instruction information transmitted by the target terminal device.

[0106] It should be explained 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. As can be seen from the above, the target terminal device may be the first terminal device. Alternatively, the target terminal device may be a terminal device that communicates with the first terminal device via sidelink.

[0107] For example, pre-configured information or network device configuration information includes resource pool configuration information, and resource pool configuration information includes instruction information for instructing common interlacing.

[0108] The following describes how to determine the dedicated RB of the first PSFCH or the transmission resources occupied by the first PSFCH, with reference to Examples 1 to 3.

[0109] Example 1 In Example 1, for one PSFCH transmission opportunity, the dedicated RB or transmission resource occupied by the first PSFCH may be determined from the first candidate transmission resource set.

[0110] The first candidate transmission resource set may be a set of candidate PSFCH transmission resources. In some embodiments, the candidate set of PSFCH transmission resources includes all resources available for PSFCH transmission. For example, the candidate set of PSFCH transmission resources includes not only common interlace resources for PSFCH transmission, but also dedicated interlace or dedicated RB resources for PSFCH transmission. In some embodiments, the candidate set of PSFCH transmission resources does not include common interlace resources. In some embodiments, the candidate set of PSFCH transmission resources includes dedicated interlace or dedicated RB resources available for PSFCH transmission. For example, the first candidate transmission resource set may include all dedicated RB or dedicated interlace resources available for the transmission of a first PSFCH within a single PSFCH transmission opportunity. Exemplarily, the first candidate transmission resource set may be a set of all resources available for the transmission of a PSFCH in a first time slot.

[0111] It should be explained that the total number of resources included in the first candidate transmission resource set can be determined based on one or more of the following: the number of RB sets available for PSFCH transmission included in the first candidate transmission resource set, the number of interlaces available for PSFCH transmission included in one RB set, the number of resource block groups available for PSFCH transmission included in one interlace, the number of code-decoded multiplexable transmission resources, the number of RB sets corresponding to the transmission resources of the first PSSCH, and the number of subchannels or interlaces corresponding to the transmission resources of the first PSSCH. This application provides several methods for determining the index of transmission resources in the first candidate transmission resource set.

[0112] In method 1, the transmission resources in the first candidate transmission resource set may be indexed first in ascending order of available RB set index, then in ascending order of interlace index, then in ascending order of resource block group index, and finally in ascending order of code area resource index.

[0113] In method 2, the transmission resources in the first candidate transmission resource set may be indexed first in ascending order of interlace index, then in ascending order of resource block group index, then in ascending order of available RB set index, and finally in ascending order of code area resource index.

[0114] In method 3, the transmission resources in the first candidate transmission resource set may be indexed first in ascending order of interlace index, then in ascending order of available RB set index, then in ascending order of resource block group index, and finally in ascending order of code area resource index.

[0115] In method 4, the transmission resources in the first candidate transmission resource set may be indexed first in ascending order of resource block group index, then in ascending order of interlace index, then in ascending order of available RB set index, and finally in ascending order of code area resource index.

[0116] In method 5, the transmission resources in the first candidate transmission resource set may be indexed first in descending order of available RB set index, then in descending order of interlace index, then in descending order of resource block group index, and finally in descending order of code area resource index.

[0117] In method 6, the transmission resources in the first candidate transmission resource set may be indexed first in descending order of interlace index, then in descending order of resource block group index, then in descending order of available RB set index, and finally in descending order of code area resource index.

[0118] In method 7, the transmission resources in the first candidate transmission resource set may be indexed first in descending order of interlace index, then in descending order of available RB set index, then in descending order of resource block group index, and finally in descending order of code area resource index.

[0119] In method 8, the transmission resources in the first candidate transmission resource set may be indexed first in descending order of resource block group index, then in descending order of interlace index, then in descending order of available RB set index, and finally in descending order of code area resource index.

[0120] The first candidate transmission resource set is described below with reference to Figure 20. Figure 20 is a schematic diagram of the frequency domain resources for one PSFCH transmission opportunity. The subcarrier spacing of the frequency domain resources shown in Figure 20 is 30 kHz. The resource pool contains two RB sets, with a guard band set between the two RB sets. The numbers in the boxes in Figure 20 represent the interlace resource index. Five interlace resources are supported within each RB set. Here, interlace 0 is set as the common interlace, and the remaining four interlaces are dedicated interlaces. K3=2, meaning one PSFCH is mapped to the common interlace and two dedicated RBs, and these two dedicated RBs constitute a resource block group. As shown in Figure 20, two adjacent RBs of interlace 1 in RB set 0 constitute one resource block group, and two adjacent RBs of interlace 1 in RB set 1 also constitute one resource block group. The first candidate transmission resource set includes interlaces 1 to 4 in RB set 0 and interlaces 1 to 4 in RB set 1. Therefore, the frequency domain resources shown in Figure 20 can be indexed according to any of Methods 1 to 8.

[0121] The following provides detailed information on the available RB sets, interlacing, resource block groups, and code area resources.

[0122] As a possible implementation, the available RB sets may be determined based on one or more of the following: the RB sets corresponding to the transmission resources of the first PSSCH, the RB sets 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 sets for the first PSFCH transmission resource may be equal to the RB sets corresponding to the transmission resources of the first PSSCH. As another example, the available RB sets for the first PSFCH transmission resource may be equal to the first RB set among the RB sets corresponding to the transmission resources of the first PSSCH. As yet another example, the available RB sets for the first PSFCH transmission resource may be equal to the RB sets included in the resource pool where the transmission resources of the first PSSCH reside. As yet another example, if the transmission opportunity corresponding to the first PSFCH is the first PSFCH transmission opportunity among N PSFCH transmission opportunities, the available RB sets may include the RB sets corresponding to the transmission resources of the first PSSCH. As another example, if the transmission opportunity corresponding to the first PSFCH is not the first PSFCH transmission opportunity out of N PSFCH transmission opportunities, the available RB sets may include RB sets included in the resource pool.

[0123] For example, the PSSCH resource pool contains four RB sets, and the transmission resources for 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 four RB sets contained in the resource pool. Optionally, if the first PSFCH corresponds to the first transmission opportunity out of 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 of N PSFCH transmission opportunities, the RB sets available for transmission of the first PSFCH may include all four RB sets contained in the resource pool.

[0124] Understandably, if the available RB sets are determined based on the RB sets corresponding to the transmission resources of the first PSSCH, then the transmission resources of the PSFCH and the transmission resources of the associated PSSCH may be located within the same RB set, or the RB set in which the PSFCH transmission resources are located may be included in the RB set corresponding to the associated PSSCH transmission resources, or the RB set in which the PSFCH transmission resources are located may be the first RB set in which the associated PSSCH transmission resources are located, or the PSFCH transmission resources may be determined from within the RB set corresponding to the PSSCH transmission resources.

[0125] If the available RB sets are determined based on the RB sets included in the resource pool corresponding to the first PSSCH, it can be understood that the transmission resources of the first PSFCH may be located in any one of the RB sets in the resource pool corresponding to the configured candidate PSFCH transmission resources.

[0126] It should be explained that the frequency domain range of one interlace in the first candidate transmission resource set corresponds to the frequency domain range of one interlace in one RB set, or the frequency domain range of one interlace in the first candidate transmission resource set is located in one RB set. For example, in Figure 20, one interlace in the first candidate transmission resource set includes interlace 1, interlace 2, interlace 3, and interlace 4 in RB set 0, and interlace 1, interlace 2, interlace 3, and interlace 4 in RB set 1. Optionally, the interlace does not have to include common interlace for PSFCH transmission. In other words, the first candidate transmission resource set can be determined based on non-common or dedicated interlace included in the available RB sets, where dedicated interlace refers to the interlace in which dedicated RBs that may be used to map PSFCH transmission resources are located.

[0127] For example, one resource pool may contain four RB sets. The subcarrier spacing of this resource pool is 30 kHz. Each RB set contains five interlaces (corresponding to interlace 0 through interlace 4). If the first interlace in each RB set (i.e., interlace 0) is set as the common interlace, then the RBs in the remaining four interlaces are dedicated RBs available for use in the first PSFCH transmission. These four interlaces are also called dedicated interlaces or non-common interlaces. In other words, each RB set contains four interlaces. Therefore, when determining the first candidate transmission resource set, the determination is based on the dedicated interlaces (corresponding to interlace 1 through interlace 4) contained in each RB set.

[0128] In some embodiments, different sets of RBs within a resource pool can be configured with their own interlacing levels for PSFCH transmission. That is, the interlacing levels within each RB set may be configured individually. In this case, the number of interlaces and / or interlacing resources within different sets of RBs in the resource pool do not have to be exactly the same.

[0129] For example, a resource pool may include two RB sets. The interlace resources available for PSFCH transmission configured in the first RB set include interlace 0, interlace 1, and interlace 2, where interlace 0 is a common interlace used for PSFCH transmission within the RB set, and the RBs included in interlace 1 and interlace 2 are dedicated RBs available for PSFCH transmission. Interlace 1 and interlace 2 are also called non-common interlace or dedicated interlace. The interlace resources available for PSFCH transmission configured in the second RB set include interlace 3 and interlace 4, where interlace 3 is a common interlace used for PSFCH transmission within the RB set, and the RBs included in interlace 4 are dedicated RBs available for PSFCH transmission. Interlace 4 is also called non-common interlace or dedicated interlace.

[0130] As another example, a resource pool may include two RB sets. The interlace resources available for PSFCH transmission configured in the first RB set include interlace 0, interlace 1, and interlace 2, where interlace 0 is a common interlace used for PSFCH transmission within the RB set, and the RBs included in interlace 1 and interlace 2 are dedicated RBs available for PSFCH transmission. Interlace 1 and interlace 2 are also called non-common interlace or dedicated interlace. The interlace resources available for PSFCH transmission configured in the second RB set include interlace 0 and interlace 4, where interlace 0 is a common interlace used for PSFCH transmission within the RB set, and the RBs included in interlace 4 are dedicated RBs available for PSFCH transmission. Interlace 4 is also called non-common interlace or dedicated interlace.

[0131] It should be noted that the interlacing within each RB set may be uniformly configured for different RB sets within a resource pool. In this case, the number of interlaces within different RB sets may be the same.

[0132] K3 dedicated RBs for carrying one PSFCH constitute one 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 interlace, where K3 may be equal to the number of dedicated RBs and K3 may be a positive integer greater than or equal to 1. Since one PSFCH occupies K3 dedicated RBs and these K3 RBs belong to the same interlace, these K3 RBs can constitute one resource block group. If one interlace contains A RBs, the resource block groups available for PSFCH transmissions contained in the interlace may be determined by the following formula, where A is a positive integer greater than or equal to 1, for example, A is equal to 10 or 11.

[0133] In Method 1, the number of resource blocks included in one interlace is

number

number

[0134] In method 1, it can be understood that any number of RBs (Resource Blocks) can be arbitrarily selected from A RBs to K3 RBs as a resource block group. The RBs included in any two resource block groups may be partially the same.

[0135] The following explanation uses A=10 and K3=2 as examples. Based on Method 1, the number of resource block groups included in the interlace is

number

[0136] For an interlace containing A resource blocks (RBs), the correspondence between the index of the resource block group contained therein and the RB index can be determined by the following method.

number

number

number

[0137] For illustrative purposes, the correspondence between the resource block group index of the interlace and its corresponding RB index may be as shown in Table 2. Here, the RB index represents the index of the RB in the 10 RBs contained in the interlace.

[0138] [Table 2]

[0139] In method 2, the number of resource block groups contained in one interlace may be equal to floor(A / K3), where floor() represents truncation. Alternatively, the number of resource block groups contained in one interlace may be equal to the integer part of the result of dividing A by K3. In some embodiments, the number of resource block groups contained in one interlace may be equal to ceil(A / K3), or the number of resource block groups contained in one interlace may be equal to round(A / K3), where ceil() represents rounding up and round() represents rounding to the nearest integer.

[0140] In method 2, it can be understood that an RB already assigned to one resource block group cannot be assigned to another resource block group. In other words, no two resource block groups will contain the same RB, or the RBs contained in any two resource block groups will all be different.

[0141] The following explanation uses A=10 and K3=2 as examples. Based on Method 2, the number of resource block groups included in the interlace is floor(10 / 2) = 5. For illustrative purposes, the correspondence between the resource block group index and its corresponding RB index is shown in Table 3. Here, the RB index represents the index of the RB in the 10 RBs included in the interlace.

[0142] [Table 3]

[0143] In method 3, when K3=1, the number of resource block groups included in one interlace may be equal to A. That is, each of the A RBs included in the interlace can correspond to one resource block group.

[0144] The following explanation uses A=10 and K3=1 as examples. Based on Method 3, the number of resource block groups included in the interlace is 10, and the correspondence between the resource block group index and its corresponding RB index is shown in Table 4. Here, the RB index represents the index of the RB in the 10 RBs included in the interlace.

[0145] [Table 4]

[0146] It should be explained that the number of RBs in each interlace within a single RB set may be the same or different. For example, if a single RB set contains a first interlace and a second interlace, the number of RBs in the first and second interlaces may be the same or different. If the number of RBs in the first and second interlaces are different, the resource block groups in the first and second interlaces can be calculated separately.

[0147] For example, one RB set includes two dedicated interlaces usable for PSFCH transmission, such as Interlace 1 (i.e., the first interlace) and Interlace 2 (i.e., the second interlace). Here, Interlace 1 contains 10 RBs and Interlace 2 contains 11 RBs. In this case, the first terminal device can calculate the resource block groups contained in each interlace. Below, for each of the three methods, we will explain with examples how to calculate the resource block groups contained in the interlace in combination with the embodiment.

[0148] Regarding Method 1 When K3=2, the number of resource block groups included in interlace 1 is

number

number

[0149] When K3=1, the number of resource block groups included in interlace 1 is

number

number

[0150] Regarding Method 2 If K3=2, the number of resource block groups in interlace 1 could be floor(10 / 2)=5. The index range of these 5 resource block groups in this interlace could be [0,4]. The number of resource block groups in interlace 2 could be floor(11 / 2)=5. The index range of these 5 resource block groups in this interlace could be [0,4].

[0151] If K3=1, the number of resource block groups in interlace 1 can be floor(10 / 1)=10. The index range for these 10 resource block groups in this interlace is [0,9]. The number of resource block groups in interlace 2 is floor(11 / 1)=11. The index range for these 11 resource block groups in this interlace is [0,10].

[0152] Regarding Method 3 If K3=1, the number of resource block groups in interlace 1 may be 10. The index range of these 10 resource block groups in this interlace may be [0,9]. The number of resource block groups in interlace 2 is 11. The index range of these resource block groups in this interlace may be [0,10].

[0153] The following describes code region resources. A code region resource may be a code-splittable multiplexable resource within a resource block group. The number of code region resources may be determined based on one or more of the number of code-splittable multiplexable circular shift pairs within a single RB, and the number of code-splittable multiplexable resources between RBs contained in a single resource block group (i.e., K3 RBs).

[0154] In some embodiments, the number of code region resources is equal to the number of code-splittable multiplexable circular shift pairs within a single RB. In some embodiments, the number of code region resources is equal to the number of code-splittable multiplexable resources between RBs contained in a single resource block group (i.e., K3 RBs). In some embodiments, the number of code region resources is equal to the product of the number of code-splittable multiplexable circular shift pairs within a single RB and the number of code-splittable multiplexable resources between RBs contained in a single resource block group (i.e., K3 RBs).

[0155] It should be explained that the number of code-divisible multiplexable cyclic shift pairs within a single RB can be determined based on a configuration parameter of the resource pool. 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. The ACK and NACK information is carried by sequences, and each sequence corresponding to an ACK and NACK can correspond to one cyclic shift value. That is, the HARQ information carried by the PSFCH corresponds to one cyclic shift pair. Multiple cyclic shift pairs can be supported for multiplexing within a single RB.

[0156] Exemplary, the number of code-space resources can be determined based on the number of code-splittable cyclic shift pairs within a single resource block (RB) and the number of code-splittable resources across RBs within a single resource block group. For example, the number of code-splittable cyclic shift pairs within a single RB may be represented by C1, and the number of code-splittable resources across RBs within a single resource block group may be represented by C2. The total number of code-splittable resources within the K3 RBs can be determined based on C1 and C2. For example, this number is equal to C1 × C2.

[0157] In some embodiments, the dedicated RB or transmission resource occupied by the first PSFCH may be determined from a first candidate set of transmission resources based on a first parameter.

[0158] The first parameter may include one or more of the second, third, fourth, fifth, sixth, seventh, eighth, ninth, and tenth parameters. Each of these will be explained below.

[0159] The second parameter can 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 interlace, or the index corresponding to the first RB. For example, the second parameter may include index information corresponding to the first subchannel of the transmission resource of the first PSSCH. Alternatively, the second parameter may include index information corresponding to the first interlace of the transmission resource of the first PSSCH. The second parameter is M F_index_1 It can be written as follows.

[0160] The third parameter can be determined based on the number of subchannels, interlaces, 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 interlaces included in the transmission resource of the first PSSCH. The third parameter is M num_1 This can be expressed as follows: For example, the number of subchannels included in the transmission resource of the first PSSCH is equal to the sum of the subchannels included in each RB set corresponding to the transmission resource of the first PSSCH, and the number of interlaces included in the transmission resource of the first PSSCH is equal to the sum of the interlaces included in each RB set corresponding to the transmission resource of the first PSSCH.

[0161] 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. Exemplary, the range of the value of the fourth parameter may be [0, P-1], where P may be determined based on the periodic parameter of the first PSFCH, or P may be determined based on the periodic 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 is M T_index_1 It can be written as follows.

[0162] The fifth parameter may 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 index of 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 index of all RB sets corresponding to the first PSSCH transmission resource. The fifth parameter is M F_index_2 It can be written as follows.

[0163] 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.

[0164] The seventh parameter can 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 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 is M T_index_2 It can be written as follows.

[0165] Based on the seventh parameter, it can be understood that the first terminal device can determine from the first candidate resource set a dedicated RB or a transmission resource occupied by the first PSFCH, based on the index of transmission opportunities corresponding to the first PSFCH.

[0166] The eighth parameter can be determined based on the total number of transmission opportunities N corresponding to the first PSFCH. For example, the eighth parameter may include the total number of transmission opportunities N corresponding to the first PSFCH. Exemplarily, the first PSFCH associated with the first PSSCH corresponds to N transmission opportunities, the sidelink feedback information corresponding to the first PSSCH is carried by the first PSFCH, and if the first PSFCH is not transmitted successfully in the first transmission opportunity due to LBT failure or other reasons, or if the first PSFCH is dropped due to conflict between sidelink and uplink transmission, the transmission of the first PSFCH is attempted in the second transmission opportunity, and so on.

[0167] The ninth parameter can 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 contained in the first SCI. Here, the first SCI can be used to schedule the first PSSCH. The first SCI may be, for example, SCI2-A / 2-B / 2-C. The second identification information is P ID It can be written as follows. Alternatively, the third identification information can be determined based on the member ID of a terminal device in the communication group, which is, for example, a terminal device that receives the first PSSCH. The third identification information is M ID It can be written as follows.

[0168] 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 is M total-1 It can be written as follows.

[0169] 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, 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 first identification information.

[0170] 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, the total number of resources included in the first candidate transmission resource set, and first identification information.

[0171] In some embodiments, the first parameter includes an 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, 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, 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 first identification information.

[0172] In some embodiments, the first parameter includes an 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, 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 resource of the first PSSCH, an 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 first identification information.

[0173] In some embodiments, the first parameter includes an index corresponding to the first interlace 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, 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 first identification information.

[0174] In some embodiments, the first parameter includes an index corresponding to the first interlace 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, the total number of resources included in the first candidate transmission resource set, and first identification information.

[0175] 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, the total number of transmission opportunities corresponding to the first PSFCH, and first identification information.

[0176] 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.

[0177] In some embodiments, the first parameter includes an 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, 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, the total number of transmission opportunities corresponding to the first PSFCH, and first identification information.

[0178] In some embodiments, the first parameter includes an 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, 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 resource of the first PSSCH, 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.

[0179] In some embodiments, the first parameter includes an index corresponding to the first interlace 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, the total number of transmission opportunities corresponding to the first PSFCH, and first identification information.

[0180] In some embodiments, the first parameter includes an index corresponding to the first interlace 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.

[0181] As can be seen from Example 1, in Example 1, the first terminal device first indexes the transmission resources included in the first candidate transmission resource set, and further, using the first parameter, the first terminal device determines the resource index corresponding to the first PSFCH transmission resource in the first candidate transmission resource, thereby determining the dedicated RB or transmission resource occupied by the first PSFCH.

[0182] In Examples 2 and 3, the PSFCH transmission resource set (for example, the first candidate transmission resource in Example 1) can be divided into multiple candidate transmission resource subsets. The first terminal device can determine one 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 that specific candidate transmission resource subset.

[0183] Based on this, some of the descriptions of the first candidate transmission resource set in Example 1 are also applicable to subsets of the first candidate transmission resource set in Examples 2 and 3.

[0184] One of the differences between Example 2 and Example 3 is the method used to divide the candidate transmission resource subset.

[0185] Example 2 In Example 2, the candidate transmission resource subset may be called the second candidate transmission resource set.

[0186] The dedicated RB or transmission resource occupied by the first PSFCH is determined from the second candidate transmission resource set.

[0187] The second candidate transmission resource set may be determined based on information about PSFCH transmission opportunities. In other words, the PSFCH transmission resource set can be divided into multiple candidate transmission resource sets, and one of these candidate transmission resource sets can be determined as the second candidate transmission resource set based on information about PSFCH transmission opportunities.

[0188] In one possible implementation, the dedicated RB or transmission resource occupied by the first PSFCH is determined from a second candidate transmission resource set. Here, 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 within that second candidate transmission resource set.

[0189] For example, based on the total number of PSFCH transmission opportunities N, the PSFCH transmission resource set can be divided into N second candidate transmission resource sets. Based on the first PSFCH transmission opportunity index n, the first terminal device can determine one of the N second candidate transmission resource sets as the second candidate transmission resource set corresponding to the first PSFCH.

[0190] As described in Example 1, the PSFCH transmission resource set can be determined based on available RB set information, interlace information included in the RB set, resource block group information included in one interlace, and code area resource information. That is, the PSFCH transmission resource set can be expressed as one or more of the RB set, interlace, resource block group, and code area resources as granularity. Accordingly, this application proposes several embodiments for dividing the PSFCH transmission resource set into multiple candidate transmission resource subsets based on different granularities.

[0191] To explain further, we will describe a method for dividing a PSFCH transmission resource set into multiple candidate transmission resource subsets, using the example that the candidate transmission resource subset is the second candidate transmission resource set. The division method described below is applicable not only to the second candidate transmission resource set but also to other embodiments (e.g., Embodiment 3) where it is necessary to divide the PSFCH transmission resource set into multiple candidate transmission resource subsets.

[0192] In some embodiments, the number of transmission resources in a second candidate transmission resource set can be determined based on the number of transmission resources included in that second candidate transmission resource set. Therefore, for ease of understanding, this application first explains which or which parameters can be used to determine the number of transmission resources included in a second candidate transmission resource set.

[0193] 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 first, second, third, and fourth numbers.

[0194] The first number can be determined based on the number of first RB sets available for PSFCH transmission. The first number can be represented by A, where A may be equal to the number of first RB sets available for PSFCH transmission.

[0195] The second number can be determined based on the number of interlaces available for PSFCH transmissions included in one of the RB sets within the first RB set. The second number is B a It can be expressed as B a This represents the number of interlaces available for PSFCH transmission included in RB set a. The number of interlaces available for PSFCH transmission included in one RB set within the first RB set may or may not include the number of common interlaces. The following explanation will use the example where the number of interlaces available for PSFCH transmission included in one RB set within the first RB set does not include the number of common interlaces. B a This may be equal to, for example, the number of interlaces available for PSFCH transmission included in RB set a within the first RB set.

[0196] The third number may be determined based on the number of resource block groups available for PSFCH transmissions contained in one interlace within one RB set. The third number is C a,b It can be expressed as C a,b This represents the number of resource block groups available for PSFCH transmission contained in interlaced b within RB set a. For example, C a,b This may be equal to the number of resource block groups available for PSFCH transmission included in interlaced b within RB set a.

[0197] The fourth number can be determined based on the number N of PSFCH transmission opportunities, where N can be the total number of transmission opportunities for the first PSFCH. For example, the fourth number may be equal to N.

[0198] Below, we describe technical solutions for dividing a PSFCH transmission resource set into multiple (e.g., N) second candidate transmission resource sets, using RB sets, interlaces, and resource block groups as frequency domain granularity.

[0199] Regarding determining the second candidate transmission resource set using the RB set as the granularity: The PSFCH transmission resource set can be divided into multiple second candidate transmission resource sets, with RB sets as the granularity. Exemplaryly, one or more RB sets available for transmission of the first PSFCH are determined based on the PSFCH transmission opportunity index, where the one or more RB sets can constitute a second candidate transmission resource set.

[0200] The number of transmission resources included in the second candidate transmission resource may be determined based on the first and fourth numbers. For example, if the first number is A and the fourth number is N, the number of RB sets L0 included in the second candidate transmission resource set can satisfy L0 = A / N, L0 = floor(A / N), L0 = ceil(A / N), or L0 = round(A / N), etc. Here, floor() represents truncation, ceil() represents rounding up, and round() represents rounding to the nearest integer.

[0201] 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 can be determined based on L0.

[0202] For example, assuming that A is an integer multiple of N, the number of RB sets included in one second candidate transmission resource set may be L0 = A / N, the first second candidate transmission resource set includes the RB set corresponding to index [0, L0-1], the second second candidate transmission resource set includes the RB set corresponding to index [L0, 2L0-1], and so on.

[0203] This application further provides an indexing scheme for resources in a second candidate transmission resource set determined with RB sets as the granularity. The resource indexing scheme may include, for example, the following:

[0204] 1) Transmission resources within the second candidate transmission resource set are indexed first in ascending order of RB set index, then in ascending order of interlace index, then in ascending order of resource block group index, and finally in ascending order of code area resource index. Or, 2) Transmission resources within the second candidate transmission resource set are indexed first in ascending order of interlace 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 area resource index. Or, 3) Transmission resources within the second candidate transmission resource set are indexed first in ascending order of interlace 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 area resource index. Or, 4) Transmission resources within the second candidate transmission resource set are indexed first in ascending order of resource block group index, then in ascending order of interlace index, then in ascending order of RB set index, and finally in ascending order of code area resource index. Or, 5) Transmission resources within the second candidate transmission resource set are indexed first in descending order of RB set index, then in descending order of interlace index, then in descending order of resource block group index, and finally in descending order of code area resource index. Or, 6) Transmission resources within the second candidate transmission resource set are indexed first in descending order of interlace 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 area resource index. Or, 7) Transmission resources within the second candidate transmission resource set are indexed first in descending order of interlace 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 area resource index. Or, 8) Transmission resources within the second candidate transmission resource set are indexed first in descending order of resource block group index, then in descending order of interlace index, then in descending order of RB set index, and finally in descending order of code area resource index.

[0205] Regarding determining the second candidate transmission resource set using interlacing as the granularity: The PSFCH transmission resource set can be divided into multiple second candidate transmission resource sets with interlace as the granularity. Exemplarily, one or more interlaces available for transmission of the first PSFCH are determined based on the PSFCH transmission opportunity index, where the one or more interlaces can constitute a second candidate transmission resource set.

[0206] The number of transmission resources included in the second candidate transmission resource set can be determined based on the first, second, and fourth numbers. For example, the total number of interlaces included in A RB sets is

number

number

Number

[0207] For all interleaves within A RB sets, the interleaving indexing method can include being indexed first in ascending order of the RB set index and then in ascending order of the interleave index, or being indexed first in descending order of the RB set index and then in descending order of the interleave index.

[0208] Based on A, B a , and N, the number of interleaves included in one second candidate transmission resource set and the corresponding interleave information (such as the aforementioned indexing method) can be determined, and the interleave information included in each second candidate transmission resource set can be determined. For example, the number of interleaves included in one second candidate transmission resource set is

Number

[0209] After determining the number L1 of interleaves included in the second candidate transmission resource set, the index of the interleaves corresponding to each second candidate transmission resource set can be determined based on L1. For example, the first said second candidate transmission resource set includes interleaves with indices [0, L1 - 1], the second said second candidate transmission resource set includes interleaves with indices [L1, 2L1 - 1], and so on by analogy.

[0210] This application further provides an indexing scheme for resources in a second candidate set of transmission resources determined by interlace granularity. The resource indexing scheme may include, for example, the following:

[0211] 1) Transmission resources within the second candidate transmission resource set are indexed first in ascending order of interlace index, then in ascending order of resource block group index, and finally in ascending order of code area resource index. Or, 2) Transmission resources within the second candidate transmission resource set are indexed first in ascending order of resource block group index, then in ascending order of interlace index, and finally in ascending order of code area resource index. Or, 3) Transmission resources within the second candidate transmission resource set are indexed first in descending order of interlace index, then in descending order of resource block group index, and finally in descending order of code area resource index. Or, 4) Transmission resources within the second candidate transmission resource set are indexed first in descending order of resource block group index, then in descending order of interlace index, and finally in descending order of code region resource index.

[0212] Regarding determining the second candidate transmission resource set using resource block groups as the granularity: A PSFCH transmission resource set can be divided into multiple second candidate transmission resource sets, with resource block groups as the granularity. Exemplarily, one or more resource block groups available for transmission in the first PSFCH are determined based on the PSFCH transmission opportunity index. Here, the one or more resource block groups can constitute a second candidate transmission resource set.

[0213] In some embodiments, the number of transmission resources included in the second candidate transmission resource set can be determined based on the first, second, third, and fourth numbers. For example, the total number of resource block groups included in A RB sets is

number

number

number

[0214] For all resource block groups within A RB sets, the indexing scheme for resource block groups may include indexing first in ascending order of RB set index, then in ascending order of interlace index, and finally in ascending order of resource block group index; or indexing first in ascending order of interlace index, then in ascending order of RB set index, and finally in ascending order of resource block group index; or indexing first in ascending order of RB set index, then in ascending order of interlace index, and finally in ascending order of resource block group index; or indexing first in ascending order of interlace index, then in ascending order of RB set index, and finally in ascending order of resource block group index.

[0215] A, B a , C a,b Based on N, the number of resource block groups included in one second candidate transmission resource set and the corresponding resource block group information (such as the indexing method described above) can be determined, and the resource block group information included in each second candidate transmission resource set can be determined. For example, the number of resource block groups included in one second candidate transmission resource set is:

number

[0216] This application further provides an indexing scheme for resources in a second candidate transmission resource set determined with resource block groups as the granularity. The resource indexing scheme may include, for example, the following:

[0217] 1) Transmission resources within the second candidate transmission resource set are indexed first according to the resource block group index (lowest to highest), and then according to the code area resource index (lowest to highest). Or, 2) Transmission resources within the second candidate transmission resource set are indexed first in descending order of resource block group index, and then in descending order of code area resource index.

[0218] It should be understood that for a single PSFCH transmission occasion or PSFCH time slot, the PSFCH candidate transmission resource set corresponding to that transmission occasion can be determined based on information such as RB set information available for PSFCH transmission, interlace information available for PSFCH transmission included in the RB set, resource block group information available for PSFCH transmission included in one interlace, and available code domain resources. Here, the available frequency domain resources for PSFCH can be determined by the RB set information available for PSFCH transmission, the interlace information available for PSFCH transmission included in the RB set, and the resource block group information available for PSFCH transmission included in one interlace, and the available code domain resources for PSFCH can be determined by the code domain resource information. In the above, the PSFCH candidate resource set can be divided into N second candidate resource sets at a frequency domain granularity such as RB set, interlace, and resource block group, and further, the corresponding second candidate resource set can be determined based on the PSFCH transmission occasion index n.

[0219] 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 according to the following Example 2-1 or Example 2-2.

[0220] Example 2-1 The dedicated RB or transmission resource occupied by the first PSFCH can be determined from the second candidate transmission resource set based on the 21st parameter. The 21st parameter includes one or more of the second parameter, the third parameter, the fourth parameter, the fifth parameter, the sixth parameter, the seventh parameter, the eighth parameter, the ninth parameter, and the 11th parameter.

[0221] For the 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, reference can be made to Example 1.

[0222] The 11th parameter may be determined based on the total number of resources included in the second candidate transmission resource set. For example, the 11th parameter can include the total number of resources included in the second candidate transmission resource set. The 11th parameter is M total-2 and can be denoted as such.

[0223] In some embodiments, the 21st 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.

[0224] In some embodiments, the 21st 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, the total number of resources included in the second candidate transmission resource set, and first identification information.

[0225] In some embodiments, the 21st parameter includes an 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, 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 total number of resources included in the second candidate transmission resource set, and first identification information.

[0226] In some embodiments, the 21st parameter includes an 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, 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, the total number of resources included in the second candidate transmission resource set, and first identification information.

[0227] In some embodiments, the 21st parameter includes an index corresponding to the first interlace 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 total number of resources included in the second candidate transmission resource set, and first identification information.

[0228] In some embodiments, the 21st parameter includes an index corresponding to the first interlace 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, the total number of resources included in the second candidate transmission resource set, and first identification information.

[0229] In some embodiments, the 21st 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.

[0230] In some embodiments, the 21st 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, a number of RB sets corresponding to the first PSSCH transmission resource, and first identification information.

[0231] In some embodiments, the 21st parameter includes an index corresponding to the first subchannel of the first PSSCH transmission resource, the number of subchannels included in 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.

[0232] In some embodiments, the 21st parameter includes an 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, 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 resource of the first PSSCH, and first identification information.

[0233] In some embodiments, the 21st parameter includes an index corresponding to the first interlace 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.

[0234] In some embodiments, the 21st parameter includes an index corresponding to the first interlace 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, a number of RB sets corresponding to the first PSSCH transmission resource, and first identification information.

[0235] In some embodiments, the first terminal device can determine, based on the 21st parameter, an index corresponding to the transmission resource of the first PSFCH from the second candidate transmission resource set, and based on this index, determine a dedicated RB or transmission resource occupied by the first PSFCH. Under different subdivision granularities, the indexing scheme for resources within the second candidate transmission resource set is as described above and will not be repeated here.

[0236] Example 2-2 In this embodiment, the dedicated RB or transmission resource occupied by the first PSFCH can be determined from a third candidate transmission resource set, and the third candidate transmission resource set can be determined from a second candidate transmission resource set. The second candidate transmission resource set can be divided into a plurality of 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 plurality of third candidate transmission resource sets, and then determine the dedicated RB or transmission resource occupied by the first PSFCH in that third candidate resource set.

[0237] In some embodiments, the third candidate transmission resource set may be determined from the second candidate transmission resource set based on the twelfth parameter. The twelfth parameter may include one or more of the second, third, fourth, fifth, sixth, and eleventh parameters. The meaning of each parameter can be found above and will not be repeated here.

[0238] In some embodiments, the 12th 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 the total number of resources included in the second candidate transmission resource set.

[0239] In some embodiments, the 12th 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 the total number of resources included in the second candidate transmission resource set.

[0240] In some embodiments, the 12th parameter includes an index corresponding to the first subchannel of the first PSSCH transmission resource, the number of subchannels included in 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 the total number of resources included in the second candidate transmission resource set.

[0241] In some embodiments, the 12th parameter includes an index corresponding to the first subchannel of the first PSSCH transmission resource, the number of subchannels included in 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 the total number of resources included in the second candidate transmission resource set.

[0242] In some embodiments, the 12th parameter includes an index corresponding to the first interlace 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 the total number of resources included in the second candidate transmission resource set.

[0243] In some embodiments, the 12th parameter includes an index corresponding to the first interlace 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 the total number of resources included in the second candidate transmission resource set.

[0244] In some embodiments, the 12th 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, and an index of the first RB set corresponding to the first PSSCH transmission resource.

[0245] In some embodiments, the 12th 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 the number of RB sets corresponding to the first PSSCH transmission resource.

[0246] In some embodiments, the 12th parameter includes an index corresponding to the first subchannel of the first PSSCH transmission resource, the number of subchannels included in the first PSSCH transmission resource, a time slot index corresponding to the first PSSCH transmission resource, and an index of the first RB set corresponding to the first PSSCH transmission resource.

[0247] In some embodiments, the 12th parameter includes an index corresponding to the first subchannel of the first PSSCH transmission resource, the number of subchannels included in 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 the number of RB sets corresponding to the first PSSCH transmission resource.

[0248] In some embodiments, the 12th parameter includes an index corresponding to the first interlace of the first PSSCH transmission resource, a time slot index corresponding to the first PSSCH transmission resource, and an index of the first RB set corresponding to the first PSSCH transmission resource.

[0249] In some embodiments, the 12th parameter includes an index corresponding to the first interlace 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 the number of RB sets corresponding to the first PSSCH transmission resource.

[0250] In some embodiments, the dedicated RB or transmission resource occupied by the first PSFCH is determined from a third candidate set of transmission resources based on a 13th parameter. The 13th parameter may include one or more of the 3rd, 5th, 6th, 9th, and 14th parameters.

[0251] The 14th parameter may be determined based on the total number of resources included in the third candidate transmission resource set. For example, the 14th parameter may be equal to the total number of resources included in the third candidate transmission resource set.

[0252] In some embodiments, the 13th parameter includes first identification information and the total number of resources included in the third candidate transmission resource set.

[0253] In some embodiments, the 13th parameter includes first identification information, the total number of resources included in the third candidate transmission resource set, and the number of subchannels included in the first PSSCH transmission resource.

[0254] In some embodiments, the 13th 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 first PSSCH transmission resource.

[0255] In some embodiments, the 13th 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.

[0256] Optionally, one of the 12th and 13th parameters may include the 3rd parameter mentioned above. That is, the 12th parameter includes the 3rd parameter, and the 13th parameter does not.

[0257] Optionally, one of the 12th and 13th parameters may include the 5th parameter mentioned above. That is, the 12th parameter includes the 5th parameter, and the 13th parameter does not.

[0258] Optionally, one of the 12th and 13th parameters may include the 6th parameter mentioned above. That is, the 12th parameter includes the 6th parameter, and the 13th parameter does not.

[0259] As can be seen from the above, if the third candidate transmission resource set is determined based on one or more of the third, fifth, and sixth parameters, the corresponding parameters do not need to be considered when determining the dedicated RB or transmission resource of the first PSFCH. If the third candidate transmission resource set is not determined based on one or more of the third, fifth, and sixth parameters, the corresponding parameters must be considered when determining the dedicated RB or transmission resource of the first PSFCH.

[0260] 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 time slot information, subchannel information, and RB set information corresponding to PSSCH transmission. In the third candidate transmission resource set, the first terminal device can further determine a specific PSFCH transmission resource based on the ninth parameter (i.e., identification information).

[0261] As mentioned above, the method for determining the second candidate transmission resource set is related to the frequency domain resource granularity. The method for determining the third candidate transmission resource set will be described below for second candidate transmission resource sets determined at different frequency domain resource granularities.

[0262] If the determined second candidate transmission resource set has a granularity of RB sets (i.e., one or more RB sets available for transmission of 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 either Method 1 or Method 2 below.

[0263] In Method 1, the third candidate transmission resource set is determined using interlace as the granularity (i.e., one or more interlaces available for transmission of the first PSFCH are determined from the second candidate transmission resource set based on the 12th parameter, and one or more interlaces constitute the third candidate transmission resource set).

[0264] The total number of interlaces included in the second candidate transmission resource set can be determined by the following method: The second candidate resource set includes A2 RB sets and B2 a The number of interlaces available for PSFCH transmission included in RB set a (excluding common interlaces) is, and the total number of interlaces included in the two RB sets is

number

[0265] If the third transmission resource set is determined using interlace as the granularity, the indexing method for resources in the second candidate resource set may be as follows:

[0266] 1) Transmission resources within the second candidate transmission resource are indexed first in descending order of RB set index, and then in descending order of interlace index. Or, 2) Transmission resources within the second candidate transmission resource are indexed first in descending order of interlace index, and then in descending order of RB set index. Or, 3) The transmission resources within the second candidate transmission resource are indexed first in descending order of RB set index, and then in descending order of interlace index. Or, 4) The transmission resources within the second candidate transmission resource are indexed first in descending order of interlace index, and then in descending order of RB set index.

[0267] Furthermore, the first terminal device can determine the third candidate transmission resource set from the second candidate transmission resource set based on the twelfth parameter. In this method, the determined third candidate transmission resource set has an interlace granularity.

[0268] It should be explained that the total number of resources included in the third candidate transmission resource set can be determined based on one or more of the following: the number of interlaces included in the third candidate transmission resource set, the number of resource block groups available for PSFCH transmission included in the interlaces, the number of code-multiplexable transmission resources, the number of RB sets corresponding to the transmission resources of the first PSSCH, and the number of subchannels or interlaces corresponding to the transmission resources of the first PSSCH.

[0269] Resources within a third candidate transmission resource set with interlace as the granularity can be indexed according to the following method:

[0270] 1) Transmission resources within the third candidate transmission resource are indexed first in descending order of interlace index, then in descending order of resource block group index, and finally in descending order of code area resource index. Or, 2) Transmission resources within the third candidate transmission resource are indexed first in descending order of resource block group index, then in descending order of interlace index, and finally in descending order of code area resource index. Or, 3) Transmission resources within the third candidate transmission resource are indexed first in descending order of interlace index, then in descending order of resource block group index, and finally in descending order of code area resource index. Or, 4) The transmission resources within the third candidate transmission resource are indexed first in descending order of resource block group index, then in descending order of interlace index, and finally in descending order of code area resource index.

[0271] The first terminal device can determine the index corresponding to the first PSFCH transmission resource in the third candidate transmission resource set based on the 13th parameter. For example, if the 13th parameter includes the 9th parameter, the first terminal device can determine the index of the first PSFCH transmission resource in the third candidate transmission resource set based on the 9th parameter. Furthermore, it can determine the dedicated RB or transmission resource occupied by the first PSFCH based on this index.

[0272] In method 2, the third transmission resource set is determined using resource block groups as the granularity (i.e., one or more resource block groups available for transmission of the first PSFCH are determined from the second candidate transmission resource set based on the 12th parameter, and one or more resource block groups constitute the third candidate transmission resource set).

[0273] The total number of resource block groups included in the second candidate transmission resource set can be determined by the following method: The second candidate resource set includes A2 RB sets and B2 a This represents the number of interlaces (excluding common interlacing) available for PSFCH transmission included in RB set a, and C2 a,b The number of resource block groups available for PSFCH transmission is included in interlaced b within RB set a, and the total number of resource block groups included in the two RB sets is

number

[0274] If the third transmission resource set is determined using resource block groups as the granularity, the indexing method for resources within the second candidate resource set may be as follows:

[0275] 1) Transmission resources within the second candidate transmission resource are indexed first in ascending order of RB set index, then in ascending order of interlace index, and finally in ascending order of resource block group index. Or, 2) Transmission resources within the second candidate transmission resource are indexed first in ascending order of resource block group index, then in ascending order of interlace index, and finally in ascending order of RB set index. Or, 3) Transmission resources within the second candidate transmission resource are indexed first in descending order of interlace index, then in descending order of RB set index, and finally in descending order of resource block group index. Or, 4) Transmission resources within the second candidate transmission resource are indexed first in descending order of interlace index, then in descending order of resource block group index, and finally in descending order of RB set index. Or, 5) Transmission resources within the second candidate transmission resource are indexed first in descending order of RB set index, then in descending order of interlace index, and finally in descending order of resource block group index. Or, 6) Transmission resources within the second candidate transmission resource are indexed first in descending order of resource block group index, then in descending order of interlace index, and finally in descending order of RB set index. Or, 7) Transmission resources within the second candidate transmission resource are indexed first in descending order of interlace index, then in descending order of RB set index, and finally in descending order of resource block group index. Or, 8) The transmission resources within the second candidate transmission resource are indexed first in descending order of interlace index, then in descending order of resource block group index, and finally in descending order of RB set index.

[0276] Furthermore, the first terminal device can determine the third candidate transmission resource set from the second candidate transmission resource set based on the twelfth parameter. In this method, the determined third candidate transmission resource set has a granularity of resource block groups.

[0277] It should be explained that the total number of resources included in the third candidate transmission resource set can be determined based on one or more of the following: the number of resource block groups available for PSFCH transmission included in the third candidate transmission resource set, the number of code-decoded multiplexable transmission resources, the number of RB sets corresponding to the transmission resources of the first PSSCH, and the number of subchannels or interlaces corresponding to the transmission resources of the first PSSCH.

[0278] Resources within a third candidate transmission resource set, with resource block groups as the granularity, can be indexed according to the following method:

[0279] 1) Transmission resources within the third candidate transmission resource are indexed first in descending order of resource block group index, and then in descending order of code area resource index. Or, 2) The transmission resources within the third candidate transmission resource are indexed first in descending order of resource block group index, and then in descending order of code area resource index.

[0280] The first terminal device can determine the index corresponding to the first PSFCH transmission resource in the third candidate transmission resource set based on the 13th parameter. For example, if the 13th parameter includes the 9th parameter, the first terminal device can determine the index of the first PSFCH transmission resource in the third candidate transmission resource set based on the 9th parameter. Furthermore, it can determine the dedicated RB or transmission resource occupied by the first PSFCH based on this index.

[0281] If the determined second candidate transmission resource set has an interlace granularity (i.e., one or more interlaces available for transmission in the first PSFCH are determined based on the PSFCH transmission opportunity index, and one or more interlaces constitute the second candidate transmission resource set), then the third candidate transmission resource set can be determined by the following methods 3 or 4.

[0282] In method 3, the third transmission resource set is determined in terms of interlace granularity (i.e., one or more interlaces available for transmission of the first PSFCH are determined from the second candidate transmission resource set based on the 12th parameter, and one or more interlaces constitute the third candidate transmission resource set).

[0283] The total number of interlaces included in the second candidate transmission resource set can be represented by B, where B does not necessarily include the number of common interlaces.

[0284] If the third transmission resource set is determined using interlace as the granularity, the indexing method for resources in the second candidate resource set may be as follows:

[0285] 1) Transmission resources within the second candidate transmission resource are indexed in descending order of interlace index. Or, 2) The transmission resources within the second candidate transmission resource are indexed in descending order of interlace index.

[0286] Furthermore, the first terminal device can determine the third candidate transmission resource set from the second candidate transmission resource set based on the twelfth parameter. In this method, the determined third candidate transmission resource set has an interlace granularity.

[0287] It should be explained that the total number of resources included in the third candidate transmission resource set can be determined based on one or more of the following: the number of interlaces included in the third candidate transmission resource set, the number of resource block groups available for PSFCH transmission included in the interlaces, the number of code-multiplexable transmission resources, the number of RB sets corresponding to the transmission resources of the first PSSCH, and the number of subchannels or interlaces corresponding to the transmission resources of the first PSSCH.

[0288] Resources within a third candidate transmission resource set with interlace as the granularity can be indexed according to the following method:

[0289] 1) The transmission resources within the third candidate transmission resource are indexed first in descending order of interlace index, then in descending order of resource block group index, and finally in descending order of code area resource index. Or, 2) The transmission resources within the third candidate transmission resource are indexed first in descending order of resource block group index, then in descending order of interlace index, and finally in descending order of code area resource index. Or, 3) The transmission resources within the third candidate transmission resource are indexed first in descending order of interlace index, then in descending order of resource block group index, and finally in descending order of code area resource index. Or, 4) The transmission resources within the third candidate transmission resource are indexed first in descending order of resource block group index, then in descending order of interlace index, and finally in descending order of code area resource index.

[0290] The first terminal device can determine the index corresponding to the first PSFCH transmission resource in the third candidate transmission resource set based on the 13th parameter. For example, if the 13th parameter includes the 9th parameter, the first terminal device can determine the index of the first PSFCH transmission resource in the third candidate transmission resource set based on the 9th parameter. Furthermore, it can determine the dedicated RB or transmission resource occupied by the first PSFCH based on this index.

[0291] In method 4, the third transmission resource set is determined using resource block groups as the granularity (i.e., one or more resource block groups available for transmission of the first PSFCH are determined from the second candidate transmission resource set based on the 12th parameter, and these one or more resource block groups constitute the third candidate transmission resource set).

[0292] The total number of resource block groups included in the second candidate transmission resource set can be determined by the following method: B represents the number of interlaces included in the second candidate transmission resource set (common interlaces do not necessarily have to be included), and C bThis represents the number of resource block groups available for PSFCH transmission included in interlaced b, and the total number of resource block groups included in the second candidate transmission resource set is

number

[0293] If the third transmission resource set is determined using resource block groups as the granularity, the indexing method for resources within the second candidate resource set may be as follows:

[0294] 1) Transmission resources within the second candidate transmission resource are indexed first in descending order of interlace index, and then in descending order of resource block group index. Or, 2) Transmission resources within the second candidate transmission resource are indexed first in descending order of resource block group index, and then in descending order of interlace index. Or, 3) Transmission resources within the second candidate transmission resource are indexed first in descending order of interlace index, and then in descending order of resource block group index. Or, 4) The transmission resources within the second candidate transmission resource are indexed first in descending order of resource block group index, and then in descending order of interlace index.

[0295] Furthermore, the first terminal device can determine the third candidate transmission resource set from the second candidate transmission resource set based on the twelfth parameter. In this method, the determined third candidate transmission resource set has a granularity of resource block groups.

[0296] It should be explained that the total number of resources included in the third candidate transmission resource set can be determined based on one or more of the following: the number of resource block groups available for PSFCH transmission included in the third candidate transmission resource set, the number of code-decoded multiplexable transmission resources, the number of RB sets corresponding to the transmission resources of the first PSSCH, and the number of subchannels or interlaces corresponding to the transmission resources of the first PSSCH.

[0297] Resources within a third candidate transmission resource set, with resource block groups as the granularity, can be indexed according to the following method:

[0298] 1) Transmission resources within the third candidate transmission resource are indexed first in descending order of resource block group index, and then in descending order of code area resource index. Or, 2) The transmission resources within the third candidate transmission resource are indexed first in descending order of resource block group index, and then in descending order of code area resource index.

[0299] The first terminal device can determine the index corresponding to the first PSFCH transmission resource in the third candidate transmission resource set based on the 13th parameter. For example, if the 13th parameter includes the 9th parameter, the first terminal device can determine the index of the first PSFCH transmission resource in the third candidate transmission resource set based on the 9th parameter. Furthermore, it can determine the dedicated RB or transmission resource occupied by the first PSFCH based on this index.

[0300] If the determined second candidate transmission resource set has a resource block group granularity (i.e., one or more resource block groups available for transmission of 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.

[0301] In method 5, the third transmission resource set is determined using resource block groups as the granularity (i.e., one or more resource block groups available for transmission of the first PSFCH are determined from the second candidate transmission resource set based on the 12th parameter, and these one or more resource block groups constitute the third candidate transmission resource set).

[0302] The total number of resource block groups included in the second candidate transmission resource set can be represented by C.

[0303] If the third transmission resource set is determined using resource block groups as the granularity, the indexing method for resources within the second candidate resource set may be as follows:

[0304] 1) Transmission resources within the second candidate transmission resource are indexed in descending order of the resource block group index. Or, 2) Transmission resources within the second candidate transmission resource are indexed in descending order of the resource block group index.

[0305] Furthermore, the first terminal device can determine the third candidate transmission resource set from the second candidate transmission resource set based on the twelfth parameter. In this method, the determined third candidate transmission resource set has a granularity of resource block groups.

[0306] It should be explained that the total number of resources included in the third candidate transmission resource set can be determined based on one or more of the following: the number of resource block groups available for PSFCH transmission included in the third candidate transmission resource set, the number of code-decoded multiplexable transmission resources, the number of RB sets corresponding to the transmission resources of the first PSSCH, and the number of subchannels or interlaces corresponding to the transmission resources of the first PSSCH.

[0307] Resources within a third candidate transmission resource set, with resource block groups as the granularity, can be indexed according to the following method:

[0308] 1) Transmission resources within the third candidate transmission resource are indexed first in descending order of resource block group index, and then in descending order of code area resource index. Or, 2) The transmission resources within the third candidate transmission resource are indexed first in descending order of resource block group index, and then in descending order of code area resource index.

[0309] The first terminal device can determine the index corresponding to the first PSFCH transmission resource in the third candidate transmission resource set based on the 13th parameter. For example, if the 13th parameter includes the 9th parameter, the first terminal device can determine the index of the first PSFCH transmission resource in the third candidate transmission resource set based on the 9th parameter. Furthermore, it can determine the dedicated RB or transmission resource occupied by the first PSFCH based on this index.

[0310] Methods 1 to 5 described above can all determine the index corresponding to the first PSFCH transmission resource within the third candidate transmission resource set. Based on this index, the first terminal device can determine the dedicated RB or transmission resource occupied by the first PSFCH.

[0311] Example 3 In Example 3, the candidate transmission resource subset may be called the fourth candidate transmission resource set. That is, the dedicated RB or transmission resource occupied by the first PSFCH is determined from the fourth candidate transmission resource set.

[0312] 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 can be divided into multiple fourth candidate resource sets, and one of these fourth candidate transmission resource sets can be determined based on the transmission resources of the PSSCH associated with the PSFCH.

[0313] In some embodiments, the fourth candidate transmission resource set may be determined based on the 15th parameter. The 15th parameter may include, for example, one or more of the second, third, fourth, fifth, and sixth parameters. For descriptions of the second, third, fourth, fifth, and sixth parameters, please refer to the above and will not be repeated here.

[0314] In some embodiments, the 15th 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, and an index of the first RB set corresponding to the first PSSCH transmission resource.

[0315] In some embodiments, the 15th 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 the number of RB sets corresponding to the first PSSCH transmission resource.

[0316] In some embodiments, the 15th parameter includes an index corresponding to the first subchannel of the first PSSCH transmission resource, the number of subchannels included in the first PSSCH transmission resource, a time slot index corresponding to the first PSSCH transmission resource, and an index of the first RB set corresponding to the first PSSCH transmission resource.

[0317] In some embodiments, the 15th parameter includes an index corresponding to the first subchannel of the first PSSCH transmission resource, the number of subchannels included in 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 the number of RB sets corresponding to the first PSSCH transmission resource.

[0318] In some embodiments, the 15th parameter includes an index corresponding to the first interlace of the first PSSCH transmission resource, a time slot index corresponding to the first PSSCH transmission resource, and an index of the first RB set corresponding to the first PSSCH transmission resource.

[0319] In some embodiments, the 15th parameter includes an index corresponding to the first interlace 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 the number of RB sets corresponding to the first PSSCH transmission resource.

[0320] Below, we describe technical solutions for dividing a PSFCH transmission resource set into multiple fourth candidate transmission resource sets, using RB sets, interlaces, and resource block groups as frequency domain granularity.

[0321] Regarding determining the fourth candidate transmission resource set using the RB set as the granularity: The PSFCH transmission resource set can be divided into multiple fourth candidate transmission resource sets, with the RB set as the granularity. Exemplarily, one or more RB sets available for transmission of the first PSFCH are determined based on the 15th parameter, where one or more RB sets constitute the fourth candidate transmission resource set.

[0322] For example, the number of transmission resources included in the fourth candidate transmission resource and the corresponding RB set information can be determined based on a first number A and a fifteenth parameter, where the first number can be determined based on the number of first RB sets available for PSFCH transmission.

[0323] This application further provides an indexing scheme for resources in a fourth candidate transmission resource set determined with RB sets as the granularity. The resource indexing scheme may include, for example, the following:

[0324] 1) Transmission resources within the fourth candidate transmission resource set are indexed first in ascending order of RB set index, then in ascending order of interlace index, then in ascending order of resource block group index, and finally in ascending order of code area resource index. Or, 2) Transmission resources within the fourth candidate transmission resource set are indexed first in ascending order of interlace 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 area resource index. Or, 3) Transmission resources within the fourth candidate transmission resource set are indexed first in ascending order of interlace 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 area resource index. Or, 4) The transmission resources in the fourth candidate transmission resource set are indexed first in ascending order of resource block group index, then in ascending order of interlace index, then in ascending order of RB set index, and finally in ascending order of code area resource index. Or, 5) The transmission resources in the fourth candidate transmission resource set are indexed first in descending order of RB set index, then in descending order of interlace index, then in descending order of resource block group index, and finally in descending order of code area resource index. Or, 6) Transmission resources within the fourth candidate transmission resource set are indexed first in descending order of interlace 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 area resource index. Or, 7) Transmission resources within the fourth candidate transmission resource set are indexed first in descending order of interlace 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 area resource index. Or, 8) Transmission resources within the fourth candidate transmission resource set are indexed first in descending order of resource block group index, then in descending order of interlace index, then in descending order of RB set index, and finally in descending order of code area resource index.

[0325] Regarding determining the fourth candidate transmission resource set using interlacing as the granularity: The PSFCH transmission resource set can be divided into multiple fourth candidate transmission resource sets with interlace as the granularity. Exemplaryly, one or more interlaces available for transmission of the first PSFCH can be determined based on the 15th parameter, and one or more interlaces constitute the fourth candidate transmission resource set.

[0326] For example, the number of interlaces included in the fourth candidate transmission resource set and the corresponding interlace information are given by the first number A and the second number B. a , and 15 parameters can be determined. Here, the first number can be determined based on the number of first RB sets available for PSFCH transmission, and the second number can be determined based on the number of interlaces available for PSFCH transmission contained in one RB within the first RB set. For example, the total number of interlaces contained in A RB sets is

number

[0327] Resources within the fourth candidate transmission resource set can be indexed using the following method.

[0328] 1) Transmission resources within the fourth candidate transmission resource set are indexed first in ascending order of interlace index, then in ascending order of resource block group index, and finally in ascending order of code area resource index. Or, 2) Transmission resources within the fourth candidate transmission resource set are indexed first in ascending order of resource block group index, then in ascending order of interlace index, and finally in ascending order of code area resource index. Or, 3) Transmission resources within the fourth candidate transmission resource set are indexed first in descending order of interlace index, then in descending order of resource block group index, and finally in descending order of code area resource index. Or, 4) The transmission resources in the fourth candidate transmission resource set are indexed first in descending order of resource block group index, then in descending order of interlace index, and finally in descending order of code area resource index.

[0329] Regarding the determination of the fourth candidate transmission resource set using resource block groups as the granularity: The PSFCH transmission resource set can be divided into multiple fourth candidate transmission resource sets, with resource block groups as the granularity. Exemplaryly, one or more resource block groups are determined for use in the transmission of the first PSFCH based on the 15th parameter, and one or more resource block groups constitute the fourth candidate transmission resource set.

[0330] In some embodiments, the number of resource block groups included in the fourth candidate transmission resource and the corresponding resource block group information are given by: First number A, Second number B a , third number C a,b , and can be determined based on the 15th parameter. Here, the first number can be determined based on the number of first RB sets available for PSFCH transmission, the second number can be determined based on the number of interlaces available for PSFCH transmission contained in one RB within the first RB set, and the third number can be determined based on the number of resource block groups available for PSFCH transmission contained in one interlace within one RB set. For example, A represents the number of RB sets, and B a This represents the number of interlaces (excluding common interlacing) available for PSFCH transmission included in RB set a, and C a,b This represents the number of resource block groups available for PSFCH transmission contained in interlaced b within RB set a. The total number of resource block groups contained in A RB sets is

number

[0331] Resources within the fourth candidate transmission resource set can be indexed using the following method.

[0332] 1) Transmission resources within the fourth candidate transmission resource set are indexed first in ascending order of resource block group index, and then in ascending order of code area resource index. Or, 2) The transmission resources in the fourth candidate transmission resource set are indexed first in descending order of resource block group index, and then in descending order of code area resource index.

[0333] After determining the fourth candidate transmission resource set to which the first PSFCH's dedicated RB or transmission resource belongs, the first PSFCH's dedicated RB or transmission resource can be determined in the fourth candidate transmission resource set according to the following Example 3-1 or Example 3-2.

[0334] Example 3-1 The dedicated RB occupied by the first PSFCH can be determined from the fourth candidate transmission resource set based on the sixteenth parameter. The sixteenth parameter includes one or more of the third, fifth, sixth, seventh, eighth, ninth, and seventeenth parameters.

[0335] For explanations of the third, fifth, sixth, seventh, eighth, and ninth parameters, please refer to Example 1.

[0336] The 17th parameter may be determined based on the total number of resources included in the fourth candidate transmission resource set. For example, the 17th parameter may include the total number of resources included in the fourth candidate transmission resource set. The 11th parameter is M total-4 It can be written as follows.

[0337] In some embodiments, the 16th parameter includes an index of the transmission opportunity corresponding to the first PSFCH and first identification information.

[0338] In some embodiments, the 16th parameter includes an index of the transmission opportunity corresponding to the first PSFCH, the total number of resources included in the fourth candidate transmission resource set, and first identification information.

[0339] In some embodiments, the 16th parameter includes an 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 fourth candidate transmission resource set, and first identification information.

[0340] In some embodiments, the 16th 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 first identification information.

[0341] In some embodiments, the 16th 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 first identification information.

[0342] In some embodiments, the 16th parameter includes the number of subchannels included in the transmission resource of the first PSSCH, 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 resources included in the fourth candidate transmission resource set, and first identification information.

[0343] In some embodiments, the first terminal device can determine, based on the 16th parameter, an index corresponding to the transmission resource of the first PSFCH from the fourth candidate transmission resource set, and based on this index, determine a dedicated RB or transmission resource occupied by the first PSFCH. Under different subdivision granularities, the indexing method for resources within the fourth candidate transmission resource set is as described above and will not be repeated here.

[0344] Example 3-2 In this embodiment, the dedicated RB or transmission resource occupied by the first PSFCH can be determined from a fifth candidate transmission resource set, and the fifth candidate transmission resource set can be determined from a fourth candidate transmission resource set. The fourth candidate transmission resource set can be divided into a plurality of 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 plurality of fifth candidate transmission resource sets, and then determine the dedicated RB or transmission resource occupied by the first PSFCH in that fifth candidate resource set.

[0345] In some embodiments, the fifth candidate transmission resource set may be determined from the fourth candidate transmission resource set based on the eighteenth parameter. The eighteenth parameter may include one or more of the seventh, eighth, and seventeenth parameters. The meaning of each parameter can be found above and will not be repeated here.

[0346] In some embodiments, the 18th parameter includes an index of the transmission opportunity corresponding to the first PSFCH.

[0347] In some embodiments, the 18th parameter includes an index of the transmission opportunity corresponding to the first PSFCH, and the total number of resources included in the fourth candidate transmission resource set.

[0348] In some embodiments, the 18th parameter includes the index of the transmission opportunity corresponding to the first PSFCH, the total number of transmission opportunities corresponding to the first PSFCH, and the total number of resources included in the fourth candidate transmission resource set.

[0349] In some embodiments, the dedicated RB or transmission resource occupied by the first PSFCH is determined from a fifth candidate transmission resource set based on the 19th parameter. The 19th parameter may include one or more of the 3rd, 5th, 6th, 9th, and 20th parameters.

[0350] The 20th parameter may be determined based on the total number of resources included in the 5th candidate transmission resource set. For example, the 20th parameter may be equal to the total number of resources included in the 5th candidate transmission resource set.

[0351] In some embodiments, the 19th parameter includes first identification information.

[0352] In some embodiments, the 19th parameter includes the total number of resources included in the fifth candidate transmission resource set, and first identification information.

[0353] In some embodiments, the 19th 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 first identification information.

[0354] In some embodiments, the 19th parameter includes the number of subchannels included in the transmission resource of the first PSSCH, the total number of resources included in the fifth candidate transmission resource set, and first identification information.

[0355] In some embodiments, the 19th 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 first identification information.

[0356] As mentioned above, the method for determining the fourth candidate transmission resource set is related to the frequency domain resource granularity. The method for determining the fifth candidate transmission resource set will be described below for the fourth candidate transmission resource set determined using different frequency domain resource granularities.

[0357] If the determined fourth candidate transmission resource set has an RB set as its granularity (i.e., one or more RB sets available for transmission of the first PSFCH are determined based on the 15th 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.

[0358] In Method 1, the fifth candidate transmission resource set is determined using interlace as the granularity (i.e., one or more interlaces available for transmission on the first PSFCH are determined from the fourth candidate transmission resource set based on the 18th parameter, and one or more interlaces constitute the fifth candidate transmission resource set).

[0359] If the fifth transmission resource set is determined by interlacing as the granularity, the indexing method for resources in the fourth candidate resource set may be as follows:

[0360] 1) The transmission resources within the fourth candidate transmission resource are indexed first in descending order of RB set index, and then in descending order of interlace index. Or, 2) The transmission resources within the fourth candidate transmission resource are indexed first in descending order of interlace index, and then in descending order of RB set index. Or, 3) The transmission resources within the fourth candidate transmission resource are indexed first in descending order of RB set index, and then in descending order of interlace index. Or, 4) The transmission resources within the fourth candidate transmission resource are first indexed in descending order of interlace index, and then in descending order of RB set index.

[0361] Furthermore, the first terminal device can determine the fifth candidate transmission resource set from the fourth candidate transmission resource set based on the 18th parameter. In this method, the determined fifth candidate transmission resource set has interlace as its granularity.

[0362] It should be explained that the total number of resources included in the fifth candidate transmission resource set can be determined based on one or more of the following: the number of interlaces included in the fifth candidate transmission resource set, the number of resource block groups available for PSFCH transmission included in the interlaces, the number of code-decode multiplexable transmission resources, the number of RB sets corresponding to the transmission resources of the first PSSCH, and the number of subchannels or interlaces corresponding to the transmission resources of the first PSSCH.

[0363] Resources within the fifth candidate transmission resource set, with interlace as the granularity, can be indexed according to the following method:

[0364] 1) Transmission resources within the fifth candidate transmission resource are indexed first in descending order of interlace index, then in descending order of resource block group index, and finally in descending order of code area resource index. Or, 2) The transmission resources within the fifth candidate transmission resource are indexed first in descending order of resource block group index, then in descending order of interlace index, and finally in descending order of code area resource index. Or, 3) The transmission resources within the fifth candidate transmission resource are indexed first in descending order of interlace index, then in descending order of resource block group index, and finally in descending order of code area resource index. Or, 4) The transmission resources within the fifth candidate transmission resource are indexed first in descending order of resource block group index, then in descending order of interlace index, and finally in descending order of code area resource index.

[0365] The first terminal device can determine the index corresponding to the first PSFCH transmission resource in the fifth candidate transmission resource set based on the 19th parameter. For example, if the 19th parameter includes the 9th parameter, the index of the first PSFCH transmission resource in the fifth candidate transmission resource set is determined based on the 9th parameter. Furthermore, the dedicated RB or transmission resource occupied by the first PSFCH is determined based on this index.

[0366] In method 2, the fifth transmission resource set is determined using resource block groups as the granularity (i.e., one or more resource block groups available for transmission of the first PSFCH are determined from the fourth candidate transmission resource set based on the 18th parameter, and one or more resource block groups constitute the fifth candidate transmission resource set).

[0367] If the fifth transmission resource set is determined using resource block groups as the granularity, the indexing method for resources within the fourth candidate resource set may be as follows:

[0368] 1) Transmission resources within the fourth candidate transmission resource are indexed first in ascending order of RB set index, then in ascending order of interlace index, and finally in ascending order of resource block group index. Or, 2) Transmission resources within the fourth candidate transmission resource are indexed first in ascending order of resource block group index, then in ascending order of interlace index, and finally in ascending order of RB set index. Or, 3) Transmission resources within the fourth candidate transmission resource are indexed first in descending order of interlace index, then in descending order of RB set index, and finally in descending order of resource block group index. Or, 4) The transmission resources within the fourth candidate transmission resource are indexed first in descending order of interlace index, then in descending order of resource block group index, and finally in descending order of RB set index. Or, 5) The transmission resources within the fourth candidate transmission resource are indexed first in descending order of RB set index, then in descending order of interlace index, and finally in descending order of resource block group index. Or, 6) The transmission resources within the fourth candidate transmission resource are indexed first in descending order of resource block group index, then in descending order of interlace index, and finally in descending order of RB set index. Or, 7) The transmission resources within the fourth candidate transmission resource are indexed first in descending order of interlace index, then in descending order of RB set index, and finally in descending order of resource block group index. Or, 8) The transmission resources within the fourth candidate transmission resource are indexed first in descending order of interlace index, then in descending order of resource block group index, and finally in descending order of RB set index.

[0369] Furthermore, the first terminal device can determine the fifth candidate transmission resource set from the fourth candidate transmission resource set based on the 18th parameter. In this method, the determined fifth candidate transmission resource set has a granularity of resource block groups.

[0370] It should be explained that the total number of resources included in the fifth candidate transmission resource set can be determined based on one or more of the following: the number of resource block groups included in the fifth candidate transmission resource set, the number of code-decodeable multiplexable transmission resources, the number of RB sets corresponding to the transmission resources of the first PSSCH, and the number of subchannels or interlaces corresponding to the transmission resources of the first PSSCH.

[0371] Resources within a fifth candidate transmission resource set, with resource block groups as the granularity, can be indexed according to the following method:

[0372] 1) Transmission resources within the fifth candidate transmission resource are indexed first in descending order of resource block group index, and then in descending order of code area resource index. Or, 2) The transmission resources within the fifth candidate transmission resource are indexed first in descending order of resource block group index, and then in descending order of code area resource index.

[0373] The first terminal device can determine the index corresponding to the first PSFCH transmission resource in the fifth candidate transmission resource set based on the 19th parameter. For example, if the 19th parameter includes the 9th parameter, the first terminal device can determine the index of the first PSFCH transmission resource in the fifth candidate transmission resource set based on the 9th parameter. Furthermore, it can determine the dedicated RB or transmission resource occupied by the first PSFCH based on this index.

[0374] In method 3, the fifth transmission resource set is determined by interlace granularity (i.e., one or more interlaces available for transmission of the first PSFCH are determined from the fourth candidate transmission resource set based on the 18th parameter, and one or more interlaces constitute the fifth candidate transmission resource set).

[0375] If the fifth transmission resource set is determined by interlacing as the granularity, the indexing method for resources in the fourth candidate resource set may be as follows:

[0376] 1) The fourth candidate transmission resource set is indexed in descending order of interlace index. Or, 2) The fourth candidate transmission resource set is indexed in descending order of interlace index.

[0377] Furthermore, the first terminal device can determine the fifth candidate transmission resource set from the fourth candidate transmission resource set based on the 18th parameter. In this method, the determined fifth candidate transmission resource set has interlace as its granularity.

[0378] It should be explained that the total number of resources included in the fifth candidate transmission resource set can be determined based on one or more of the following: the number of interlaces included in the fifth candidate transmission resource set, the number of resource block groups available for PSFCH transmission included in the interlaces, the number of code-decode multiplexable transmission resources, the number of RB sets corresponding to the transmission resources of the first PSSCH, and the number of subchannels or interlaces corresponding to the transmission resources of the first PSSCH.

[0379] Resources within the fifth candidate transmission resource set, with interlace as the granularity, can be indexed according to the following method:

[0380] 1) The transmission resources within the fifth candidate transmission resource are indexed first in descending order of interlace index, then in descending order of resource block group index, and finally in descending order of code area resource index. Or, 2) The transmission resources within the fifth candidate transmission resource are indexed first in descending order of resource block group index, then in descending order of interlace index, and finally in descending order of code area resource index. Or, 3) The transmission resources within the fifth candidate transmission resource are indexed first in descending order of interlace index, then in descending order of resource block group index, and finally in descending order of code area resource index. Or, 4) The transmission resources within the fifth candidate transmission resource are indexed first in descending order of resource block group index, then in descending order of interlace index, and finally in descending order of code area resource index.

[0381] The first terminal device can determine the index corresponding to the first PSFCH transmission resource in the fifth candidate transmission resource set based on the 19th parameter. For example, if the 19th parameter includes the 9th parameter, the first terminal device can determine the index of the first PSFCH transmission resource in the fifth candidate transmission resource set based on the 9th parameter. Furthermore, it can determine the dedicated RB or transmission resource occupied by the first PSFCH based on this index.

[0382] In method 4, the fifth transmission resource set is determined using resource block groups as the granularity (i.e., one or more resource block groups available for transmission of the first PSFCH are determined from the fourth candidate transmission resource set based on the 18th parameter, and one or more resource block groups constitute the fifth candidate transmission resource set).

[0383] If the fifth transmission resource set is determined using resource block groups as the granularity, the indexing method for resources within the fourth candidate resource set may be as follows:

[0384] 1) Transmission resources within the fourth candidate transmission resource are indexed first in descending order of interlace index, and then in descending order of resource block group index. Or, 2) The transmission resources within the fourth candidate transmission resource are indexed first in descending order of resource block group index, and then in descending order of interlace index. Or, 3) The transmission resources within the fourth candidate transmission resource are indexed first in descending order of interlace index, and then in descending order of resource block group index. Or, 4) The transmission resources within the fourth candidate transmission resource are indexed first in descending order of resource block group index, and then in descending order of interlace index.

[0385] Furthermore, the first terminal device can determine the fifth candidate transmission resource set from the fourth candidate transmission resource set based on the 18th parameter. In this method, the determined fifth candidate transmission resource set has a granularity of resource block groups.

[0386] It should be explained that the total number of resources included in the fifth candidate transmission resource set can be determined based on one or more of the following: the number of resource block groups included in the fifth candidate transmission resource set, the number of code-decodeable multiplexable transmission resources, the number of RB sets corresponding to the transmission resources of the first PSSCH, and the number of subchannels or interlaces corresponding to the transmission resources of the first PSSCH.

[0387] Resources within a fifth candidate transmission resource set, with resource block groups as the granularity, can be indexed according to the following method:

[0388] 1) Transmission resources within the fifth candidate transmission resource are indexed first in descending order of resource block group index, and then in descending order of code area resource index. Or, 2) The transmission resources within the fifth candidate transmission resource are indexed first in descending order of resource block group index, and then in descending order of code area resource index.

[0389] The first terminal device can determine the index corresponding to the first PSFCH transmission resource in the fifth candidate transmission resource set based on the 19th parameter. For example, if the 19th parameter includes the 9th parameter, the index of the first PSFCH transmission resource in the fifth candidate transmission resource set is determined based on the 9th parameter. Furthermore, the dedicated RB or transmission resource occupied by the first PSFCH is determined based on this index.

[0390] In method 5, the fifth transmission resource set is determined using resource block groups as the granularity (i.e., one or more resource block groups available for transmission of the first PSFCH are determined from the fourth candidate transmission resource set based on the 18th parameter, and one or more resource block groups constitute the fifth candidate transmission resource set).

[0391] If the fifth transmission resource set is determined using resource block groups as the granularity, the indexing method for resources within the fourth candidate resource set may be as follows:

[0392] 1) Transmission resources within the fourth candidate transmission resource are indexed in descending order of resource block group index. Or, 2) The transmission resources within the fourth candidate transmission resource are indexed in descending order of the resource block group index.

[0393] Furthermore, the first terminal device can determine the fifth candidate transmission resource set from the fourth candidate transmission resource set based on the 18th parameter. In this method, the determined fifth candidate transmission resource set has a granularity of resource block groups.

[0394] It should be explained that the total number of resources included in the fifth candidate transmission resource set can be determined based on one or more of the following: the number of resource block groups included in the fifth candidate transmission resource set, the number of code-decodeable multiplexable transmission resources, the number of RB sets corresponding to the transmission resources of the first PSSCH, and the number of subchannels or interlaces corresponding to the transmission resources of the first PSSCH.

[0395] Resources within a fifth candidate transmission resource set, with resource block groups as the granularity, can be indexed according to the following method:

[0396] 1) Transmission resources within the fifth candidate transmission resource are indexed first in descending order of resource block group index, and then in descending order of code area resource index. Or, 2) The transmission resources within the fifth candidate transmission resource are indexed first in descending order of resource block group index, and then in descending order of code area resource index.

[0397] Furthermore, in the fifth candidate transmission resource set, the first terminal device can determine the index corresponding to the first PSFCH transmission resource based on the 19th parameter. For example, if the 19th parameter includes the 9th parameter mentioned above, the index of the first PSFCH transmission resource in the fifth candidate transmission resource set is determined based on the 9th parameter.

[0398] Methods 1 to 5 described above can all determine the index corresponding to the first PSFCH transmission resource within the third candidate transmission resource set. Based on this index, the first terminal device can determine the dedicated RB or transmission resource occupied by the first PSFCH.

[0399] In some embodiments, the resources transmitted by the first PSSCH may correspond to one or more RB sets. One or more RB sets may include a second RB set. The first terminal device may determine the transmission resources for the first PSFCH from 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.

[0400] As a possible implementation, the first terminal device can determine the transmission resource of the first PSFCH from within 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 in the second RB set of the first PSSCH transmission resource, index corresponding to the first interlace or index corresponding to the first RB, the number of subchannels, interlaces or RBs included in the second RB set of the first PSSCH transmission resource, time slot index corresponding to the transmission resource of the first PSSCH, index of the transmission opportunity corresponding to the first PSFCH, total number of transmission opportunities corresponding to the first PSFCH, and 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 identifier included in the first SCI, the first SCI is used to schedule the first PSSCH, and the third identification information is either 0 or determined based on the member identifier of the terminal device in the communication group.

[0401] 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 or last RB set among the one or more RB sets. The first terminal device can determine the second RB set or the RB set corresponding to the transmission resources of the first PSSCH from the one or more RB sets corresponding to the first PSSCH transmission resources based on one or more of the following: protocol predefined information, pre-configured information, network device configuration information, and instruction information transmitted from the target terminal device.

[0402] It should be explained 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. As can be seen from the above, the target terminal device may be the first terminal device. Alternatively, the target terminal device may be a terminal device that communicates with the first terminal device via sidelink.

[0403] In some embodiments, if the resources transmitted by the first PSSCH 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 among the multiple RB sets corresponding to the resources transmitted by the first PSSCH.

[0404] In some implementations, the first terminal device can determine the transmission resources for the first PSFCH from within the third RB set. That is, the first terminal device can determine the transmission resources for the first PSFCH corresponding to the second and third RB sets, respectively, and the first PSFCH in each RB set corresponds to the same time-domain resources. If the resources transmitted by the first PSFCH correspond to multiple RB sets, the transmission resources for the first PSFCH can be determined from within each of the multiple RB sets. For example, the resources transmitted by the first PSFCH correspond to four RB sets, the second RB set is the first of the four RB sets, and the third RB set includes the second, third, and fourth of the four RB sets, and the first terminal device determines the transmission resources for the first PSFCH from within each of the four RB sets.

[0405] After determining the transmission resources for the first PSFCH within each RB set, the first terminal device can simultaneously transmit the first PSFCH within each RB set.

[0406] The first terminal device can determine the transmission resource of the first PSFCH from within the third RB set based on one or more of the following parameters: index information corresponding to the third RB set, index corresponding to the first subchannel in the third RB set of the first PSSCH transmission resource, index corresponding to the first interlace or index corresponding to the first RB, the number of subchannels, interlace count or RB count included in the third RB set of the first PSSCH transmission resource, time slot index corresponding to the first PSSCH transmission resource, index of the transmission opportunity corresponding to the first PSFCH, total number of transmission opportunities corresponding to the first PSFCH, and first identification information.

[0407] It should be understood that if the first PSSCH includes multiple RB sets, and the transmitting device of the first PSSCH initiates one channel occupancy time (COT) when transmitting the first PSSCH, and shares it with the transmitting device of the first PSFCH, then if the first PSFCH is located in only one RB set and there are no PSFCH transmissions in the other RB sets, then in the other RB sets, devices from other systems (e.g., a WiFi system) may preemptively occupy the shared spectrum within the time range corresponding to the PSFCH transmission opportunity, thereby preventing subsequent sidelink transmission from continuing. This application provides a technical solution to avoid as much as possible the situation in which there are no PSFCHs to transmit in an RB set, thereby preventing the shared spectrum from being occupied by devices from other systems, and further enabling normal sidelink transmission.

[0408] Optionally, whether to determine the transmission resource for the first PSFCH within the third RB set can be determined based on whether the first terminal device has a PSFCH awaiting transmission within the third RB set. For example, if the first terminal device does not have a PSFCH awaiting transmission within the third RB set, the first terminal device can determine the transmission resource for the first PSFCH from within the third RB set. If the first terminal device has a PSFCH awaiting transmission within the third RB set (which is to be transmitted to the second terminal device or another terminal device), the first terminal device does not determine the transmission resource for the first PSFCH within the third RB set.

[0409] If there are PSFCHs waiting to transmit within the third RB set, those PSFCHs occupy the third RB set. Even if the first PSFCH transmission resource is not determined within the third RB set, the sidelink system can be guaranteed that the user will continue to occupy the channel.

[0410] In some implementations, the first terminal device can determine the transmission resources of the third PSFCH from within the third RB set. Here, the transmission resources of the third PSFCH may include common interlacing within the third RB set. The time-domain resources of the third PSFCH and the first PSFCH are the same.

[0411] As a possible implementation, the transmission resources of the third PSFCH may include only common interlacing within the third RB set. Since the third PSFCH does not occupy a dedicated RB, it should be understood that in this case, the third PSFCH is an extra PSFCH. In other words, no valid sidelink feedback information is transmitted using the transmission resources of the third PSFCH.

[0412] For example, the second RB set may be the first of several RB sets corresponding to the first PSSCH transmission resource. The transmission resource of the first PSFCH (including common interlace and dedicated RBs) is located within the first of several RB sets corresponding to the first PSSCH transmission resource, and the first terminal device can determine the transmission resource of the third PSFCH (including common interlace only) within any of the other RB sets other than the first RB set.

[0413] As another example, the second RB set may be one of several RB sets corresponding to the first PSSCH transmission resources. The transmission resources of the first PSFCH (including common interlace and dedicated RBs) are located within this one RB set, and the first terminal equipment can determine the transmission resources of the third PSFCH (including common interlace only) from other RB sets other than this one RB set.

[0414] Understandably, if the transmission resources of the third PSFCH consist only of common interlacing within the third RB set, this not only ensures exclusive use of the frequency domain resources of the third RB set and avoids preemption by equipment in other systems, but also does not cause interference to PSFCH transmissions of other users in the sidelink system.

[0415] As a possible implementation, the transmission resources of the third PSFCH can include common interlacing within the third RB set and dedicated RBs occupied by the third PSFCH. In other words, valid feedback information can be transmitted within the transmission resources of the third PSFCH.

[0416] For example, the third PSFCH is also associated with the first PSSCH. That is, the sidelink feedback information carried by 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. Exemplaryly, 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 of the first PSSCH's transmission resources in the third RB set, the index corresponding to the first interlace, or the index corresponding to the first RB, the number of subchannels, interlaces, or RBs included in the third RB set of the first PSSCH's transmission resources, or the time slot index corresponding to the transmission resources of the first PSSCH.

[0417] Optionally, whether to determine the third PSFCH transmission resource in the third RB set can be determined based on whether the first terminal device has a PSFCH waiting to be transmitted within the third RB set (the PSFCH being transmitted to the second terminal device or another terminal device). For example, if the first terminal device does not have a PSFCH waiting to be transmitted within the third RB set, the first terminal device can determine the transmission resource for the third PSFCH from within the third RB set. If the first terminal device has a PSFCH waiting to be transmitted within the third RB set, the first terminal device does not determine the transmission resource for the third PSFCH from within the third RB set.

[0418] If there are PSFCHs waiting to transmit within the third RB set, those PSFCHs occupy the third RB set. Even if the first PSFCH transmission resource is not determined within the third RB set, the sidelink system can be guaranteed that the user will continue to occupy the channel.

[0419] After determining the transmission resources for the third PSFCH, the first terminal device can transmit the first PSFCH and the third PSFCH.

[0420] The present application will be 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.

[0421] As shown in Figure 21, UE1 transmits the first PSSCH to UE2 in time slot 1. The transmission resources for the first PSSCH are located in RB set 0 and RB set 1. UE1 initiates a COT and shares it with UE2. Based on the transmission resources for the first PSSCH, UE2 can determine that the transmission resources for the associated first PSFCH are located in RB set 0. If, during the PSFCH transmission opportunity in time slot 4, UE2 does not transmit a PSFCH in RB set 1 and transmits the first PSFCH only in RB set 0, equipment from other systems may preempt the channel in RB set 1 within the time range corresponding to the PSFCH transmission resources. As a result, the COT shared by UE1 cannot be used by other users of the sidelink system in RB set 1, reducing the transmission efficiency of the SL system. Therefore, during the PSFCH transmission opportunity in time slot 4, UE2 can determine the transmission resources for the third PSFCH in RB set 1, and this third PSFCH can occupy only the common interlace within RB set 1. In a sidelink system, UE2 can transmit the first PSFCH and the third PSFCH in RB set 0 and RB set 1, respectively, to ensure that a user can persistently occupy a channel, thereby preventing other system users from preempting the channel.

[0422] In the example above, if, during the PSFCH transmission opportunity in time slot 4, UE2 has a fourth PSFCH waiting to be transmitted in RB set 1, and this fourth PSFCH is to be transmitted, for example, from UE2 to UE3, then it should be understood that UE2 does not need to determine the third PSFCH in RB set 1. This is because, in this case, the fourth PSFCH transmitted by UE2 can also occupy RB set 1, and in a sidelink system, it is also guaranteed that the user can continuously occupy the channel.

[0423] In some embodiments, PSFCHs with higher priority can be transmitted preferentially within the same time-domain resource. Optionally, a lower priority value indicates a higher priority for the PSFCH.

[0424] In some embodiments, the priority of the first PSFCH may be determined based on the priority of the first PSSCH associated with it. For example, the first PSFCH may have the same priority as the first PSSCH.

[0425] In some embodiments, the third PSFCH and the first PSFCH may have the same priority. For example, if the transmission resources of the third PSFCH include a dedicated RB, 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 PSFCH associated with it. In other words, the third PSFCH and the first PSFCH may have the same priority.

[0426] In some embodiments, the priority of the third PSFCH may be lower than that of the first PSFCH. For example, if the transmission resources of the third PSFCH include only common interlacing, the priority of the third PSFCH may be lower than that of the first PSFCH in order to prioritize the transmission of the first PSFCH carrying valid sidelink feedback information.

[0427] In some embodiments, the priority of the third PSFCH may be lower than the priority of the PSFCH carrying valid sidelink feedback information. For example, if the transmission resources of the third PSFCH include only common interlacing, the priority value of the PSFCH carrying valid sidelink feedback information may be in the range of [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 can be transmitted preferentially, that is, the transmission of feedback information is given priority.

[0428] In some embodiments, the priority of the third PSFCH may be higher than the priority of some or all PSFCHs that carry valid feedback information. For example, the priority values ​​of PSFCHs that carry valid feedback information may be in the range of [1,8], and the priority value of the third PSFCH may be 1 or less. In this implementation, the sidelink system can prioritize the persistent occupancy of a user's channel, that is, it prioritizes ensuring that the channel is not preempted by other system users.

[0429] In some embodiments, 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 instruction information transmitted from the target terminal device. For example, instruction information may be included in the preconfigured information or network configuration information, and this instruction information may be used to indicate that the priority value of the third PSFCH is 8.

[0430] It should be explained 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. As can be seen from the above, the target terminal device may be the first terminal device. Alternatively, the target terminal device may be a terminal device that communicates with the first terminal device via sidelink.

[0431] It should be noted that in the embodiments of this application, RB is also called PRB, meaning that RB may be equivalent to PRB.

[0432] It should be explained that a dedicated RB is also called a dedicated PRB, meaning that a dedicated RB may be equivalent to a dedicated PRB.

[0433] Embodiments of the method of this application are described in detail above, and embodiments of the apparatus of this application are described in detail below. Since the description of the method embodiments corresponds to the description of the apparatus embodiments, it should be understood that for parts not described in detail, one can refer to the method embodiments described above.

[0434] Figure 22 is a schematic structural diagram of a terminal device 2200 according to an embodiment of the present application. The terminal device 2200 is a first terminal device and may include a decision unit 2210.

[0435] The decision unit is configured to determine the transmission resources of the first PSFCH, which include one or more of the common interlace and dedicated RBs occupied by the first PSFCH.

[0436] In some embodiments, common interlacing is determined based on one or more of the following: protocol predefined information, preconfigured information, network device configuration information, and instruction information transmitted by the target terminal device, where the target terminal device is a terminal device that transmits a first PSFCH, a terminal device that receives a first PSFCH, a terminal device that transmits 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.

[0437] In some embodiments, for a single PSFCH transmission opportunity, the dedicated RB occupied by the first PSFCH is determined from a first candidate transmission resource set.

[0438] In some embodiments, transmission resources in the first candidate transmission resource set are indexed first in ascending order of available RB set index, then in ascending order of interlace index, then in ascending order of resource block group index, and finally in ascending order of code area resource index. Alternatively, transmission resources in the first candidate transmission resource set are indexed first in ascending order of interlace index, then in ascending order of resource block group index, then in ascending order of available RB set index, and finally in ascending order of code area resource index. Alternatively, transmission resources in the first candidate transmission resource set are indexed first in ascending order of interlace index, then in ascending order of available RB set index, then in ascending order of resource block group index, and finally in ascending order of code area resource index. Alternatively, transmission resources in the first candidate transmission resource set are indexed first in ascending order of resource block group index, then in ascending order of interlace index, then in ascending order of available RB set index, and finally in ascending order of code area resource index.

[0439] In some embodiments, the available RB sets are determined based on one or more of the following: the RB sets corresponding to the transmission resources of the first PSSCH, the RB sets 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, where the first PSSCH is associated with the first PSFCH.

[0440] In some embodiments, if the transmission opportunity corresponding to the first PSFCH is the first PSFCH transmission opportunity out of N PSFCH transmission opportunities, the available RB set includes the RB set corresponding to the transmission resource of the first PSFCH, and / or, if the transmission opportunity corresponding to the first PSFCH is not the first PSFCH transmission opportunity out of N PSFCH transmission opportunities, the available RB set includes the RB set included in the resource pool.

[0441] In some embodiments, the frequency domain range of one interlace in the first candidate transmission resource set corresponds to the frequency domain range of one interlace in one RB set.

[0442] In some embodiments, the interlacing within the first candidate transmission resource set does not include common interlacing.

[0443] In some embodiments, the interlaces available for PSFCH transmissions are configured independently for different sets of RBs within the resource pool.

[0444] In some embodiments, one resource block group corresponds to K3 RBs in one interlace, where K3 is equal to the number of dedicated RBs and K3 is a positive integer greater than or equal to 1.

[0445] In some embodiments, if one interlace contains A RBs, the number of resource block groups contained in one interlace is...

number

number

[0446] In some embodiments, if one interlace contains A RBs, the number of resource block groups contained in one interlace is equal to floor(A / K3), where A is a positive integer greater than or equal to 1, and floor represents truncation.

[0447] In some embodiments, if one interlace contains A RBs and K3=1, then the number of resource block groups contained in one interlace is equal to A, where A is a positive integer greater than or equal to 1.

[0448] In some embodiments, if a single RB set includes a first interlace and a second interlace, the number of RBs included in the first interlace and the second interlace may be the same or different.

[0449] In some embodiments, the number of code region resources is determined based on one or more of the number of code-splittable cyclic shift pairs within a single resource block (RB) and the number of code-splittable resources across RBs contained within a single resource block group.

[0450] In some embodiments, the dedicated RBs occupied by the first PSFCH are determined from a first candidate set of transmission resources based on a first parameter, the first parameter comprising one or more of the second, third, fourth, fifth, sixth, seventh, eighth, ninth, and tenth parameters; the second parameter is determined based on the index corresponding to the first subchannel, the index corresponding to the first interlace, or the index corresponding to the first RB of the transmission resource of the first PSSCH; the third parameter is determined based on the number of subchannels, the number of interlaces, or the number of RBs included in the transmission resource of the first PSSCH; the fourth parameter is determined based on the time slot index corresponding to the transmission resource of the first PSSCH; and the fifth parameter is the transmission resource of the first PSSCH The sixth parameter is determined based on the index of the corresponding RB set, the sixth parameter is determined based on the number of RB sets corresponding to the transmission resources of the first PSSCH, the seventh parameter is determined based on the index n 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 identifier contained in the first sidelink 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 identifier of the terminal equipment 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, where the first PSSCH is associated with the first PSFCH.

[0451] In some embodiments, the dedicated RB occupied by the first PSFCH is determined from a second candidate transmission resource set, where the second candidate transmission resource set is determined based on the PSFCH transmission opportunity index.

[0452] 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 first, second, third, and fourth numbers, where the 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 interlaces available for PSFCH transmission included in one RB set within the first RB set, the third number is determined based on the number of resource block groups available for PSFCH transmission included in one interlace within one RB set, and the fourth number is determined based on the number N of PSFCH transmission opportunities.

[0453] In some embodiments, the number of transmission resources included in the second candidate transmission resource set is determined based on the first and fourth numbers.

[0454] 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 truncation.

[0455] In some embodiments, the determination of the second candidate transmission resource set based on the PSFCH transmission opportunity index includes determining one or more RB sets available for transmission of the first PSFCH based on the PSFCH transmission opportunity index, and having one or more RB sets constitute the second candidate transmission resource set.

[0456] In some embodiments, transmission resources in the second candidate transmission resource set are indexed first in ascending order of RB set index, then in ascending order of interlace index, then in ascending order of resource block group index, and finally in ascending order of code area resource index. Alternatively, transmission resources in the second candidate transmission resource set are indexed first in ascending order of interlace 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 area resource index. Alternatively, transmission resources in the second candidate transmission resource set are indexed first in ascending order of interlace 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 area resource index. Alternatively, transmission resources in the second candidate transmission resource set are indexed first in ascending order of resource block group index, then in ascending order of interlace index, then in ascending order of RB set index, and finally in ascending order of code area resource index.

[0457] 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.

[0458] In some embodiments, the number of interlaces L1 included in the second candidate transmission resource set is

number

[0459] In some embodiments, the determination of a second candidate transmission resource set based on the PSFCH transmission opportunity index includes determining one or more interlaces available for transmission of the first PSFCH based on the PSFCH transmission opportunity index, such that one or more interlaces constitute the second candidate transmission resource set.

[0460] In some embodiments, transmission resources in the second candidate transmission resource set are indexed first in ascending order of interlace index, then in ascending order of resource block group index, and finally in ascending order of code area resource index. Alternatively, transmission resources in the second candidate transmission resource set are indexed first in ascending order of resource block group index, then in ascending order of interlace index, and finally in ascending order of code area resource index.

[0461] In some embodiments, the number of transmission resources included in the second candidate transmission resource set is determined based on the first number, second number, third number, and fourth number.

[0462] In some embodiments, the number L2 of resource block groups included in the second candidate transmission resource set is

number

[0463] In some embodiments, the determination of a second candidate transmission resource set based on the PSFCH transmission opportunity index includes determining one or more RB resource block groups available for transmission in the first PSFCH based on the PSFCH transmission opportunity index, such that one or more resource block groups constitute the second candidate transmission resource set.

[0464] In some embodiments, transmission resources within a second candidate transmission resource set are indexed first according to the lowest resource block group index, and then according to the lowest code area resource index.

[0465] In some embodiments, the dedicated RB occupied by the first PSFCH is determined from a second candidate set of transmission resources based on the 21st parameter, which includes one or more of the 2nd, 3rd, 4th, 5th, 6th, 7th, 8th, 9th, and 11th parameters, the 2nd parameter is determined based on the index corresponding to the first subchannel, the index corresponding to the first interlace, or the index corresponding to the first RB of the transmission resource of the first PSSCH, the 3rd parameter is determined based on the number of subchannels, the number of interlaces, or the number of RBs included in the transmission resource of the first PSSCH, the 4th parameter is determined based on the time slot index corresponding to the transmission resource of the first PSSCH, and the 5th parameter is the transmission RB of the first PSSCH The sixth parameter is determined based on the index of the RB set corresponding to the source, the sixth parameter is determined based on the number of RB sets corresponding to the transmission resources of the first PSSCH, the seventh parameter is determined based on the index n 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 identifier contained 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 identifier of the terminal equipment 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, where the first PSSCH is associated with the first PSFCH.

[0466] In some embodiments, the determination of a dedicated RB occupied by a first PSFCH from a second candidate transmission resource set based on a 21st parameter includes the determination of a dedicated RB occupied by a first PSFCH based on an index corresponding to the transmission resource of the first PSFCH, and the index being determined from a second candidate transmission resource set based on a 21st parameter.

[0467] 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 a second candidate transmission resource set.

[0468] In some embodiments, a third candidate transmission resource set is determined from a second candidate transmission resource set based on a 12th parameter, the 12th parameter comprising one or more of the 2nd, 3rd, 4th, 5th, 6th, and 11th parameters, wherein the 2nd parameter is determined based on the index corresponding to the first subchannel, the index corresponding to the first interlace, or the index corresponding to the first RB of the transmission resource of the first PSSCH; the 3rd parameter is determined based on the number of subchannels, interlaces, or RBs included in the transmission resource of the first PSSCH; the 4th parameter is determined based on the time slot index corresponding to the transmission resource of the first PSSCH; the 5th parameter is determined based on the index of the RB set corresponding to the transmission resource of the first PSSCH; the 6th parameter is determined based on the number of RB sets corresponding to the transmission resource of the first PSSCH; and the 11th parameter is determined based on the total number of resources included in the second candidate transmission resource set.

[0469] In some embodiments, the dedicated RBs occupied by the first PSFCH are determined from a third candidate transmission resource set based on a 13th parameter, the 13th parameter comprising one or more of the 3rd, 5th, 6th, 9th, and 14th parameters, the 3rd parameter being determined based on the number of subchannels, interlaces, or RBs included in the transmission resources of the first PSSCH, the 5th parameter being determined based on the index of the RB set corresponding to the transmission resources of the first PSSCH, the 6th parameter being determined based on the number of RB sets corresponding to the transmission resources of the first PSSCH, the 9th parameter being determined based on a 1st identification information, the 1st identification information comprising a 2nd identification information and / or a 3rd identification information, the 2nd identification information being determined based on the source identifier included in the 1st SCI, the 1st SCI being used to schedule the first PSSCH, the 3rd identification information being 0 or the 3rd identification information being determined based on the member identifier of the terminal equipment in the communication group, and the 14th parameter being determined based on the total number of resources included in the third candidate transmission resource set.

[0470] In some embodiments, the determination of a second candidate transmission resource set based on the PSFCH transmission opportunity index includes determining one or more RB sets available for transmission of the first PSFCH based on the PSFCH transmission opportunity index, such that one or more RB sets constitute the second candidate transmission resource set, and the determination of a third candidate transmission resource set from the second candidate transmission resource set based on a 12th parameter includes determining one or more interlaces available for transmission of the first PSFCH from the second candidate transmission resource set based on a 12th parameter, such that one or more interlaces constitute the third candidate transmission resource set.

[0471] In some embodiments, transmission resources within a second candidate transmission resource are indexed first in ascending order of RB set index, and then in ascending order of interlace index. Alternatively, transmission resources within a second candidate transmission resource are indexed first in ascending order of interlace index, and then in ascending order of RB set index.

[0472] In some embodiments, transmission resources within a third candidate transmission resource are indexed first in ascending order of interlace index, then in ascending order of resource block group index, and finally in ascending order of code area resource index. Alternatively, transmission resources within a third candidate transmission resource are indexed first in ascending order of resource block group index, then in ascending order of interlace index, and finally in ascending order of code area resource index.

[0473] In some embodiments, the determination of a second candidate transmission resource set based on the PSFCH transmission opportunity index includes determining one or more RB sets available for transmission of the first PSFCH based on the PSFCH transmission opportunity index, such that one or more RB sets constitute the second candidate transmission resource set, and the determination of a third candidate transmission resource set from the second candidate transmission resource set based on a 12th parameter includes determining one or more resource block groups available for transmission of the first PSFCH from the second candidate transmission resource set based on a 12th parameter, such that one or more resource block groups constitute the third candidate transmission resource set.

[0474] In some embodiments, transmission resources within a second candidate transmission resource are indexed first in ascending order of RB set index, then in ascending order of interlace index, and finally in ascending order of resource block group index. Alternatively, transmission resources within a second candidate transmission resource are indexed first in ascending order of resource block group index, then in ascending order of interlace index, and finally in ascending order of RB set index. Alternatively, transmission resources within a second candidate transmission resource are indexed first in ascending order of interlace index, then in ascending order of RB set index, and finally in ascending order of resource block group index. Alternatively, transmission resources within a second candidate transmission resource are indexed first in ascending order of interlace index, then in ascending order of resource block group index, and finally in ascending order of RB set index.

[0475] In some embodiments, transmission resources within a third candidate transmission resource are indexed first in ascending order of resource block group index, and then in ascending order of code area resource index.

[0476] In some embodiments, the determination of a second candidate transmission resource set based on the PSFCH transmission opportunity index includes determining one or more interlaces available for transmission of the first PSFCH based on the PSFCH transmission opportunity index, such that one or more interlaces constitute the second candidate transmission resource set, and the determination of a third candidate transmission resource set from the second candidate transmission resource set based on a 12th parameter includes determining one or more interlaces available for transmission of the first PSFCH from the second candidate transmission resource set based on the 12th parameter, such that one or more interlaces constitute the third candidate transmission resource set.

[0477] In some embodiments, the second candidate transmission resource set is indexed in descending order of interlace index.

[0478] In some embodiments, transmission resources within a third candidate transmission resource are indexed first in ascending order of interlace index, then in ascending order of resource block group index, and finally in ascending order of code area resource index. Alternatively, transmission resources within a third candidate transmission resource are indexed first in ascending order of resource block group index, then in ascending order of interlace index, and finally in ascending order of code area resource index.

[0479] In some embodiments, the determination of a second candidate transmission resource set based on the PSFCH transmission opportunity index includes determining one or more interlaces available for transmission of the first PSFCH based on the PSFCH transmission opportunity index, such that one or more interlaces constitute the second candidate transmission resource set, and the determination of a third candidate transmission resource set from the second candidate transmission resource set based on a 12th parameter includes determining one or more resource block groups available for transmission of the first PSFCH from the second candidate transmission resource set based on a 12th parameter, such that one or more resource block groups constitute the third candidate transmission resource set.

[0480] In some embodiments, transmission resources within a second candidate transmission resource are indexed first in ascending order of interlace index, and then in ascending order of resource block group index. Alternatively, transmission resources within a second candidate transmission resource are indexed first in ascending order of resource block group index, and then in ascending order of interlace index.

[0481] In some embodiments, transmission resources within a third candidate transmission resource are indexed first in ascending order of resource block group index, and then in ascending order of code area resource index.

[0482] In some embodiments, the determination of a second candidate transmission resource set based on the PSFCH transmission opportunity index includes determining one or more resource block groups available for transmission of the first PSFCH based on the PSFCH transmission opportunity index, such that one or more resource block groups constitute the second candidate transmission resource set, and the determination of a third candidate transmission resource set from the second candidate transmission resource set based on a 12th parameter includes determining one or more resource block groups available for transmission of the first PSFCH from the second candidate transmission resource set based on a 12th parameter, such that one or more resource block groups constitute the third candidate transmission resource set.

[0483] In some embodiments, transmission resources within a second candidate transmission resource are indexed in descending order of their resource block group index.

[0484] In some embodiments, transmission resources within a third candidate transmission resource are indexed first in ascending order of resource block group index, and then in ascending order of code area resource index.

[0485] In some embodiments, the determination of a dedicated RB occupied by a first PSFCH from a third candidate transmission resource set based on a 13th parameter includes the determination of a dedicated RB occupied by a first PSFCH based on an index corresponding to the transmission resource of the first PSFCH, and the index being determined from a third candidate transmission resource set based on a 13th parameter.

[0486] In some embodiments, the dedicated RBs occupied by the first PSFCH are determined from a fourth candidate transmission resource set, the fourth candidate transmission resource set is determined based on a 15th parameter, the 15th parameter includes one or more of the second, third, fourth, fifth, and sixth parameters, the second parameter is determined based on the index corresponding to the first subchannel, the index corresponding to the first interlace, or the index corresponding to the first RB of the transmission resource of the first PSSCH, the third parameter is determined based on the number of subchannels, the number of interlaces, or the number of RBs included in the transmission resource of the first PSSCH, the fourth parameter is determined based on the time slot index corresponding to the transmission resource of the first PSSCH, the fifth parameter is determined based on the index of the RB set corresponding to the transmission resource of the first PSSCH, and the sixth parameter is determined based on the number of RB sets corresponding to the transmission resource of the first PSSCH, where the first PSSCH is associated with the first PSFCH.

[0487] In some embodiments, the determination of the fourth candidate transmission resource set based on the 15th parameter includes determining one or more RB sets available for transmission of the first PSFCH based on the 15th parameter, such that one or more RB sets constitute the fourth candidate transmission resource set.

[0488] In some embodiments, transmission resources in the fourth candidate transmission resource set are indexed first in ascending order of RB set index, then in ascending order of interlace index, then in ascending order of resource block group index, and finally in ascending order of code area resource index. Alternatively, transmission resources in the fourth candidate transmission resource set are indexed first in ascending order of interlace 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 area resource index. Alternatively, transmission resources in the fourth candidate transmission resource set are indexed first in ascending order of interlace 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 area resource index. Alternatively, transmission resources in the fourth candidate transmission resource set are indexed first in ascending order of resource block group index, then in ascending order of interlace index, then in ascending order of RB set index, and finally in ascending order of code area resource index.

[0489] In some embodiments, the determination of the fourth candidate transmission resource set based on the 15th parameter includes determining one or more interlaces available for transmission in the first PSFCH based on the 15th parameter, such that one or more interlaces constitute the fourth candidate transmission resource set.

[0490] In some embodiments, transmission resources in the fourth candidate transmission resource set are indexed first in ascending order of interlace index, then in ascending order of resource block group index, and finally in ascending order of code area resource index. Alternatively, transmission resources in the fourth candidate transmission resource set are indexed first in ascending order of resource block group index, then in ascending order of interlace index, and finally in ascending order of code area resource index.

[0491] In some embodiments, the determination of the fourth candidate transmission resource set based on the 15th parameter includes determining one or more resource block groups available for transmission in the first PSFCH based on the 15th parameter, such that one or more resource block groups constitute the fourth candidate transmission resource set.

[0492] In some embodiments, transmission resources within the fourth candidate transmission resource set are indexed first according to the lowest resource block group index, and then according to the lowest code area resource index.

[0493] In some embodiments, the dedicated RBs occupied by the first PSFCH are determined from a fourth candidate transmission resource set based on a 16th parameter, the 16th parameter includes one or more of the 3rd, 5th, 6th, 7th, 8th, 9th, and 17th parameters, the 3rd parameter is determined based on the number of subchannels, interlaces, or RBs included in the transmission resources of the first PSSCH, the 5th parameter is determined based on the index of the RB set corresponding to the transmission resources of the first PSSCH, the 6th parameter is determined based on the number of RB sets corresponding to the transmission resources of the first PSSCH, and the 7th parameter is The 8th parameter is determined based on the index n of the transmission opportunity corresponding to the 1st PSFCH, the 9th parameter is determined based on the 1st identification information, which includes the 2nd and / or 3rd identification information, the 2nd identification information is determined based on the source identifier included in the 1st SCI, the 1st SCI is used to schedule the 1st PSSCH, the 3rd identification information is 0 or the 3rd identification information is determined based on the member identifier of the terminal equipment in the communication group, and the 17th parameter is determined based on the total number of resources included in the 4th candidate transmission resource set, where the 1st PSSCH is associated with the 1st PSFCH.

[0494] In some embodiments, determining the dedicated RB occupied by the first PSFCH from a fourth candidate transmission resource set based on a 16th parameter includes determining the index corresponding to the transmission resource of the first PSFCH from the fourth candidate transmission resource set based on the 16th parameter, and determining the dedicated RB occupied by the first PSFCH based on the index.

[0495] In some embodiments, the dedicated RB occupied by the first PSFCH is determined from a fifth candidate transmission resource set, which is determined from a fourth candidate transmission resource set.

[0496] In some embodiments, the fifth candidate transmission resource set is determined from the fourth candidate transmission resource set based on the 18th parameter, which includes one or more of the 7th, 8th, and 17th parameters, where the 7th parameter is determined based on the index of transmission opportunities corresponding to the first PSFCH, the 8th parameter is determined based on the total number of transmission opportunities corresponding to the first PSFCH, and the 17th parameter is determined based on the total number of resources in the fourth candidate transmission resource set.

[0497] In some embodiments, the dedicated RBs occupied by the first PSFCH are determined from the fifth candidate transmission resource set based on the 19th parameter, which includes one or more of the 3rd, 5th, 6th, 9th, and 20th parameters, where the 3rd parameter is determined based on the number of subchannels, interlaces, or RBs included in the transmission resources of the first PSSCH; the 5th parameter is determined based on the index of the RB set corresponding to the transmission resources of the first PSSCH; the 6th parameter is determined based on the number of RB sets corresponding to the transmission resources of the first PSSCH; the 9th parameter is determined based on the 1st identification information, which includes the 2nd and / or 3rd identification information, where the 2nd identification information is determined based on the source identifier included in the 1st SCI, which is used to schedule the first PSSCH; the 3rd identification information is either 0 or determined based on the member identifier of the terminal equipment in the communication group; and the 20th parameter is determined based on the total number of resources in the fifth candidate transmission resource set.

[0498] In some embodiments, the determination of a fourth candidate transmission resource set based on a 15th parameter includes determining one or more RB sets available for transmission in the first PSFCH based on the 15th parameter, such that one or more RB sets constitute the fourth candidate transmission resource set, and the determination of a fifth candidate transmission resource set from the fourth candidate transmission resource set based on an 18th parameter includes determining one or more interlaces available for transmission in the first PSFCH from the fourth candidate transmission resource set based on the 18th parameter, such that one or more interlaces constitute the fifth candidate transmission resource set.

[0499] In some embodiments, the transmission resources within the fourth candidate transmission resource are indexed first in ascending order of RB set index, and then in ascending order of interlace index. Alternatively, the transmission resources within the fourth candidate transmission resource are indexed first in ascending order of interlace index, and then in ascending order of RB set index.

[0500] In some embodiments, transmission resources within the fifth candidate transmission resource are indexed first in ascending order of interlace index, then in ascending order of resource block group index, and finally in ascending order of code area resource index. Alternatively, transmission resources within the fifth candidate transmission resource are indexed first in ascending order of resource block group index, then in ascending order of interlace index, and finally in ascending order of code area resource index.

[0501] In some embodiments, the determination of a fourth candidate transmission resource set based on a 15th parameter includes determining one or more RB sets available for transmission in the first PSFCH based on the 15th parameter, such that one or more RB sets constitute the fourth candidate transmission resource set, and the determination of a fifth candidate transmission resource set from the fourth candidate transmission resource set based on an 18th parameter includes determining one or more resource block groups available for transmission in the first PSFCH from the fourth candidate transmission resource set based on the 18th parameter, such that one or more resource block groups constitute the fifth candidate transmission resource set.

[0502] In some embodiments, transmission resources within the fourth candidate transmission resource are indexed first in ascending order of RB set index, then in ascending order of interlace index, and finally in ascending order of resource block group index. Alternatively, transmission resources within the fourth candidate transmission resource are indexed first in ascending order of resource block group index, then in ascending order of interlace index, and finally in ascending order of RB set index. Alternatively, transmission resources within the fourth candidate transmission resource are indexed first in ascending order of interlace index, then in ascending order of RB set index, and finally in ascending order of resource block group index. Alternatively, transmission resources within the fourth candidate transmission resource are indexed first in ascending order of interlace index, then in ascending order of resource block group index, and finally in ascending order of RB set index.

[0503] In some embodiments, transmission resources within the fifth candidate transmission resource are indexed first in ascending order of resource block group index, and then in ascending order of code area resource index.

[0504] In some embodiments, the determination of a fourth candidate transmission resource set based on a 15th parameter includes determining one or more interlaces available for transmission in the first PSFCH based on the 15th parameter, such that one or more interlaces constitute the fourth candidate transmission resource set, and the determination of a fifth candidate transmission resource set from the fourth candidate transmission resource set based on an 18th parameter includes determining one or more interlaces available for transmission in the first PSFCH from the fourth candidate transmission resource set based on the 18th parameter, such that one or more interlaces constitute the fifth candidate transmission resource set.

[0505] In some embodiments, the transmission resources within the fourth candidate transmission resource are indexed in descending order of interlace index.

[0506] In some embodiments, transmission resources within the fifth candidate transmission resource are indexed first in ascending order of interlace index, then in ascending order of resource block group index, and finally in ascending order of code area resource index. Alternatively, transmission resources within the fifth candidate transmission resource are indexed first in ascending order of resource block group index, then in ascending order of interlace index, and finally in ascending order of code area resource index.

[0507] In some embodiments, the determination of a fourth candidate transmission resource set based on a 15th parameter includes determining one or more interlaces available for transmission in the first PSFCH based on the 15th parameter, such that one or more interlaces constitute the fourth candidate transmission resource set, and the determination of a fifth candidate transmission resource set from the fourth candidate transmission resource set based on an 18th parameter includes determining one or more resource block groups available for transmission in the first PSFCH from the fourth candidate transmission resource set based on the 18th parameter, such that one or more resource block groups constitute the fifth candidate transmission resource set.

[0508] In some embodiments, transmission resources within the fourth candidate transmission resource are indexed first in descending order of interlace index, and then in descending order of resource block group index. Alternatively, The transmission resources within the fourth candidate transmission resource are indexed first according to the lowest resource block group index, and then according to the lowest interlace index.

[0509] In some embodiments, transmission resources within the fifth candidate transmission resource are indexed first in ascending order of resource block group index, and then in ascending order of code area resource index.

[0510] In some embodiments, the determination of a fourth candidate transmission resource set based on a 15th parameter includes determining one or more resource block groups available for transmission in the first PSFCH based on the 15th parameter, such that one or more resource block groups constitute the fourth candidate transmission resource set, and the determination of a fifth candidate transmission resource set from the fourth candidate transmission resource set based on an 18th parameter includes determining one or more resource block groups available for transmission in the first PSFCH from the fourth candidate transmission resource set based on the 18th parameter, such that one or more resource block groups constitute the fifth candidate transmission resource set.

[0511] In some embodiments, transmission resources within the fourth candidate transmission resource are indexed in descending order of the resource block group index.

[0512] In some embodiments, transmission resources within the fifth candidate transmission resource are indexed first in ascending order of resource block group index, and then in ascending order of code area resource index.

[0513] In some embodiments, determining the transmission resources occupied by the first PSFCH from a fifth candidate transmission resource set based on a 19th parameter includes determining the index corresponding to the transmission resources of the first PSFCH from the fifth candidate transmission resource set based on the 19th parameter, and determining the dedicated RB occupied by the first PSFCH based on the index.

[0514] 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 within the same RB set, then the transmission resources of the first PSFCH and the transmission resources of the second PSFCH contain the same common interlacing.

[0515] In some embodiments, a first PSSCH is associated with a first PSFCH, the transmission resources of the first PSSCH include a second RB set, and the decision unit is configured to determine the transmission resources of the first PSFCH from within the second RB set, where the first PSSCH is associated with the first PSFCH.

[0516] In some embodiments, determining the transmission resource of the first PSFCH from the second RB set includes determining the transmission resource of the first PSFCH from the second RB set based on one or more of the following parameters: index information corresponding to the second RB set, index of the transmission resource of the first PSSCH corresponding to the first subchannel in the second RB set, index of the first interlace or index of the first RB, the number of subchannels, interlaces or RBs included in the second RB set of the transmission resource of the first PSSCH, time slot index corresponding to the transmission resource of the first PSSCH, index of the transmission opportunity corresponding to the first PSFCH, total number of transmission opportunities corresponding to the first PSFCH, and 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 a source identifier included in first sidelink control information SCI, the first SCI is used to schedule the first PSSCH, and the third identification information is either 0 or determined based on a member identifier of a terminal device in a communication group.

[0517] In some embodiments, the second RB set is the first of one or more RB sets corresponding to the transmission resources of the first PSSCH.

[0518] In some embodiments, the transmission resources of the first PSSCH further include a third RB set, and the decision unit is configured to determine the transmission resources of the first PSFCH from within the third RB set.

[0519] In some embodiments, determining the transmission resource for the first PSFCH from within the third RB set includes determining the transmission resource for the first PSFCH from within the third RB set if, within the time-domain resource corresponding to the first PSFCH transmission resource, the first terminal device does not have a PSFCH waiting to transmit within the third RB set.

[0520] 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 from among the multiple RB sets.

[0521] In some embodiments, the transmission resources of the first PSSCH further include a third RB set, and the terminal equipment is further used to determine the transmission resources of the third PSFCH from within the third RB set, where the transmission resources of the third PSFCH include common interlacing within the third RB set, and the time-domain resources of the third PSFCH and the first PSFCH are the same.

[0522] In some embodiments, determining the transmission resource for the third PSFCH from within the third RB set includes determining the transmission resource for the third PSFCH from within the third RB set if, within the time-domain resource corresponding to the first PSFCH transmission resource, the first terminal device does not have a PSFCH waiting to transmit within the third RB set.

[0523] In some embodiments, the terminal device is further used to transmit the first PSFCH and the third PSFCH.

[0524] In selectable embodiments, the decision 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 Figure 23.

[0525] Figure 23 is a schematic structural 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 selectable. The device 2300 can be used to implement the method described in the embodiment of the method described above. The device 2300 may be a chip, terminal equipment, or network equipment.

[0526] The apparatus 2300 may include one or more processors 2310. The processors 2310 can support the apparatus 2300 in implementing the method described in the embodiment of the above method. The processors 2310 may be general-purpose processors or dedicated processors. 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 devices, discrete gates, or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor, or the processor may be any conventional processor, etc.

[0527] The device 2300 may further include one or more memories 2320. The memories 2320 store programs that can be executed by the processor 2310 and cause the processor 2310 to execute the method described in the embodiment of the above method. The memories 2320 may be independent of the processor 2310 or may be integrated with the processor 2310.

[0528] The device 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 send and receive data with other devices or chips via the transceiver 2330.

[0529] Embodiments of this application further provide a computer-readable storage medium for storing a program. The computer-readable storage medium can be applied to a terminal device provided by the embodiments of this application, and the program causes a computer to execute the method performed by the terminal device in each embodiment of this application.

[0530] Embodiments of this application further provide a computer program product including a program. The computer program product can be applied to terminal equipment provided by embodiments of this application, and the program causes a computer to perform the methods performed by the terminal equipment in each embodiment of this application.

[0531] Embodiments of this application further provide a computer program. The computer program can be applied to a terminal device provided by the embodiments of this application, and the computer program causes a computer to perform a method performed by the terminal device in each embodiment of this application.

[0532] It should be understood that the terms “system” and “network” in this application may always be used interchangeably. Furthermore, the terms used in this application are used solely to interpret the specific embodiments of this application and are not intended to limit this application. The terms “first,” “second,” “third,” and “fourth” in the specification, claims, and accompanying drawings of this application are used to distinguish different subjects, not to indicate a particular order. Furthermore, the terms “includes” and “have,” and any variations thereof, are intended to cover non-exclusive inclusion.

[0533] The “instruction” described in the embodiments of this application may be a direct instruction, an indirect instruction, or an indication of a related relationship. For example, A instructing B may indicate that A directly instructs B, for example, that B can be obtained by A; or A indirectly instructs B, for example, that A instructs C and B can be obtained by C; or it may indicate a related relationship between A and B.

[0534] In the embodiments of this application, "B corresponding to A" means that B is related to A and that B can be determined based on A. However, it should be further understood that determining B based on A does not mean determining B based solely on A, but that B can also be determined based on A and / or other information.

[0535] In the embodiments of this application, the term "correspondence" may indicate a direct or indirect correspondence between two parties, or a related relationship between two parties, and may be a relationship such as indicating and being indicated, or composing and being composed.

[0536] In the embodiments of this application, “predefined” or “preconfigured” can be implemented by pre-storing corresponding codes, tables, or other means for indicating relevant information within the device (e.g., including terminal devices and network devices), and this application does not limit the specific implementation methods. For example, “predefined” may refer to those defined in a protocol.

[0537] In the embodiments of this application, the “protocol” may refer to, but is not limited to, standard protocols in the field of communications, including, for example, LTE protocols, NR protocols, and related protocols applicable to future communication systems.

[0538] In the embodiments of this application, the term "and / or" is merely a relation that describes the related objects, indicating that three relationships are possible. For example, A and / or B can indicate three situations: A exists independently, A and B exist simultaneously, or B exists independently. Furthermore, the symbol " / " in this specification generally indicates that the preceding and following related objects are in an "or" relationship.

[0539] In the embodiments of this application, the term “includes” may mean either directly or indirectly include. Optionally, “includes” as described in the embodiments of this application may be replaced with “indicates” or “used to determine.” For example, “A includes B” may be replaced with “A indicates B” or “A is used to determine B.”

[0540] In the various embodiments of this application, the magnitude of the serial number of each process does not indicate the order in which they are executed. The execution order of each process should be determined by its function and internal logic and does not constitute any limitation to the implementation processes of the embodiments of this application.

[0541] In some embodiments provided in this application, it should be understood that the disclosed systems, apparatus and methods can be implemented in other ways. For example, the embodiments of the apparatus described above are illustrative only, and for instance, the division of the units is only a logical functional division, and other divisional modes may be possible in actual implementation, for example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not performed. Also, the mutual coupling, direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, apparatus or unit, and may be in electrical, mechanical or other forms.

[0542] 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 among multiple network units. Depending on the actual needs, some or all of these units can be selected to achieve the objectives of the solution of this embodiment.

[0543] Furthermore, each functional unit in each embodiment of this application may be integrated into a single processing unit, the individual units may exist physically independently, and two or more units may be integrated into a single unit.

[0544] The embodiments described above can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. If implemented by 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 processes or functions described in the embodiments of this application are generated in whole or in part. The computer may be a general-purpose computer, a dedicated computer, a computer network, or other programmable device. The computer instructions may be stored on a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via a wired method (e.g., coaxial cable, fiber optic cable, digital subscriber line (DSL)) or wireless method (e.g., infrared, radio, microwave, etc.). The computer-readable storage medium may be any usable medium readable by a computer, or it may be a data storage device including a server, data center, etc., that integrates one or more usable media. The usable media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., digital video discs (DVDs)), or semiconductor media (e.g., solid state disks (SSDs)).

[0545] The above descriptions are merely specific embodiments of the present application, and the scope of protection of this application is not limited thereto. Any person skilled in the art will readily conceive of any variations or substitutions within the technical scope disclosed herein, and all such variations or substitutions should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be subject to the scope of protection of the claims.

Claims

1. A method for sidelink transmission, The first terminal device determines the transmission resources of the first physical side-link feedback channel (PSFCH), The transmission resources of the first PSFCH are The common interlace occupied by the first PSFCH, and A method for sidelink transmission, comprising one or more dedicated resource blocks (RBs) occupied by the first PSFCH.

2. The aforementioned common interlacing is Protocol predefined information, Pre-set information, Network device configuration information, and Determined based on one or more of the instruction information transmitted by the target terminal device, The target terminal device is a terminal device that transmits the first PSFCH, a terminal device that receives the first PSFCH, a terminal device that transmits the first physical sidelink shared channel (PSSCH), or a terminal device that receives the first PSSCH, wherein the first PSSCH is associated with the first PSFCH. The method for sidelink transmission according to claim 1.

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

4. The transmission resources in the first candidate transmission resource set are indexed first in ascending order of available RB set index, then in ascending order of interlace index, then in ascending order of resource block group index, and finally in ascending order of code area resource index, or The transmission resources in the first candidate transmission resource set are indexed first in ascending order of interlace index, then in ascending order of resource block group index, then in ascending order of available RB set index, and finally in ascending order of code area resource index, or The transmission resources within the first candidate transmission resource set are indexed first in ascending order of interlace index, then in ascending order of available RB set index, then in ascending order of resource block group index, and finally in ascending order of code area resource index, or The transmission resources in the first candidate transmission resource set are indexed in ascending order of resource block group index, then in ascending order of interlace index, then in ascending order of available RB set index, and finally in ascending order of code area resource index. The method for sidelink transmission according to claim 3.

5. The available RB sets are: 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 The determination is made based on one or more of the following: 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 PSFCH. The first PSSCH is associated with the first PSFCH, characterized in that The method for sidelink transmission according to claim 4.

6. If the transmission opportunity corresponding to the first PSFCH is the first PSFCH transmission opportunity among the N PSFCH transmission opportunities, then the available RB set includes the RB set corresponding to the transmission resource of the first PSFCH, 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, characterized in that The method for sidelink transmission according to claim 5.

7. The frequency domain range of one interlace within the first candidate transmission resource set corresponds to the frequency domain range of one interlace within one RB set. A method for sidelink transmission according to any one of claims 4 to 6.

8. The interlacing within the first candidate transmission resource set does not include the common interlacing, characterized in that A method for sidelink transmission according to any one of claims 4 to 7.

9. The interlacing available for PSFCH transmission, configured for different RB sets within the resource pool, is configured independently. A method for sidelink transmission according to any one of claims 4 to 8.

10. The resource block group is characterized in that one resource block group corresponds to K3 RBs in one interlace, where K3 is equal to the number of dedicated RBs, and K3 is a positive integer of 1 or more. A method for sidelink transmission according to any one of claims 4 to 9.

11. If one interlace contains A RBs, the number of resource block groups contained in the one interlace is [Math 1] It is equal to and A is a positive integer greater than or equal to 1, [Math 2] This is characterized by representing the number of combinations formed by arbitrarily selecting K3 elements from A elements. The method for sidelink transmission according to claim 10.

12. When one interlace contains A RBs, the number of resource block groups contained in the one interlace is equal to floor(A / K3), where A is a positive integer of 1 or more, and floor represents truncation. The method for sidelink transmission according to claim 10.

13. The characteristic is that when one interlace contains A RBs and K3 = 1, the number of resource block groups contained in the one interlace is equal to A, and A is a positive integer of 1 or more. The method for sidelink transmission according to claim 10.

14. When a single RB set includes a first interlace and a second interlace, the number of RBs included in the first interlace and the second interlace is either the same or different. A method for sidelink transmission according to any one of claims 4 to 13.

15. The number of the aforementioned code area resources is The number of code-splittable cyclic shift pairs within a single RB, and This is characterized by being determined based on one or more of the number of resources that can be code-split multiplexed between RBs included in a single resource block group. A method for sidelink transmission according to any one of claims 4 to 14.

16. The dedicated RB occupied by the first PSFCH is determined from the first candidate transmission resource set based on a first parameter, the first parameter includes one or more of the second, third, fourth, fifth, sixth, seventh, eighth, ninth, and tenth parameters, The second parameter is determined based on the index corresponding to the first subchannel of the transmission resource of the first PSSCH, the index corresponding to the first interlace, or the index corresponding to the first RB. The third parameter is determined based on the number of subchannels, interlaces, or RBs included in the transmission resources of the first PSSCH. The fourth parameter is determined based on the time slot index corresponding to the transmission resource of the first PSSCH, The fifth parameter is determined based on the index of the RB set corresponding to the transmission resource of the first PSSCH, The sixth parameter is determined based on the number of RB sets corresponding to the transmission resources of the first PSSCH, The seventh parameter is determined based on the index of transmission opportunities 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 a first identification information, the first identification information includes a second identification information and / or a third identification information, the second identification information is determined based on a source identifier included in the first sidelink 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 a member identifier of a terminal device in a communication group. The tenth parameter is 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, characterized in that A method for sidelink transmission according to any one of claims 3 to 15.

17. The dedicated RB occupied by the first PSFCH is determined from a second candidate transmission resource set, and the second candidate transmission resource set is determined based on the PSFCH transmission opportunity index. A method for sidelink transmission according to claim 1 or 2.

18. The number of transmission resources included in the second candidate transmission resource set is determined based on one or more of the first number, second number, third number, and fourth number. The 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 interlaces available for PSFCH transmission included in one of the RB sets within the first RB set. The third number is determined based on the number of resource block groups available for PSFCH transmission included in one interlace within one RB set. The fourth number is determined based on the number N of PSFCH transmission opportunities, The method for sidelink transmission according to claim 17.

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

20. The number of RB sets included in the second candidate transmission resource set L ０ is, L ０ = A / N, or L ０ The formula satisfies = floor(A / N), where A represents the first number and floor represents truncation. The method for sidelink transmission according to claim 18 or 19.

21. The fact that the second candidate transmission resource set is determined based on the PSFCH transmission opportunity index means that The present invention is characterized in that one or more RB sets available for transmission of 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. A method for sidelink transmission according to any one of claims 17 to 20.

22. The transmission resources in the second candidate transmission resource set are indexed first in ascending order of RB set index, then in ascending order of interlace index, then in ascending order of resource block group index, and finally in ascending order of code area resource index, or The transmission resources in the second candidate transmission resource set are indexed first in ascending order of interlace 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 area resource index, or The transmission resources within the second candidate transmission resource set are indexed first in ascending order of interlace 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 area resource index, or The transmission resources in the second candidate transmission resource set are indexed in ascending order of resource block group index, then in ascending order of interlace index, then in ascending order of RB set index, and finally in ascending order of code area resource index. The method for sidelink transmission according to claim 21.

23. 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, characterized in that The method for sidelink transmission according to claim 18.

24. The number of interlaces L included in the second candidate transmission resource set. １ teeth, [Math 3] The following conditions are met, where A represents the first number, and B ａ The characteristics are that represents the second number, N represents the fourth number, floor represents truncation, a is an integer, and the range of the value of a is [0, A-1]. The method for sidelink transmission according to claim 18 or 23.

25. The fact that the second candidate transmission resource set is determined based on the PSFCH transmission opportunity index means that The present invention is characterized in that one or more interlaces available for transmission of the first PSFCH are determined based on the PSFCH transmission opportunity index, and the one or more interlaces constitute the second candidate transmission resource set. A method for sidelink transmission according to claim 17, 18, 23, or 24.

26. The transmission resources in the second candidate transmission resource set are indexed first in ascending order of interlace index, then in ascending order of resource block group index, and finally in ascending order of code area resource index, or The transmission resources in the second candidate transmission resource set are indexed first in descending order of resource block group index, then in descending order of interlace index, and finally in descending order of code area resource index. The method for sidelink transmission according to claim 25.

27. 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, characterized in that The method for sidelink transmission according to claim 18.

28. The number of resource block groups L included in the second candidate transmission resource set. ２ teeth, [Math 4] satisfies, where A represents the first number, and B ａ represents the second number, and C ａ，ｂ represents the third number, N represents the fourth number, floor represents rounding down, both a and b are integers, the value range of a is [0, A - 1], and the value range of b is [0, B ａ - 1], characterized in that The method for sidelink transmission according to claim 27.

29. The fact that the second candidate transmission resource set is determined based on the PSFCH transmission opportunity index means that The present invention is characterized in that one or more RB resource block groups available for transmission of 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. A method for sidelink transmission according to claim 17, 18, 27, or 28.

30. The transmission resources in the second candidate transmission resource set are indexed first in descending order of resource block group index, and then in descending order of code area resource index, characterized in that The method for sidelink transmission according to claim 29.

31. The dedicated RB occupied by the first PSFCH is determined from the second candidate transmission resource set based on the 21st parameter, the 21st parameter includes one or more of the 2nd, 3rd, 4th, 5th, 6th, 7th, 8th, 9th, and 11th parameters, The second parameter is determined based on the index corresponding to the first subchannel of the transmission resource of the first PSSCH, the index corresponding to the first interlace, or the index corresponding to the first RB. The third parameter is determined based on the number of subchannels, interlaces, or RBs included in the transmission resources of the first PSSCH. The fourth parameter is determined based on the time slot index corresponding to the transmission resource of the first PSSCH, The fifth parameter is determined based on the index of the RB set corresponding to the transmission resource of the first PSSCH, The sixth parameter is determined based on the number of RB sets corresponding to the transmission resources of the first PSSCH, The seventh parameter is determined based on the index of transmission opportunities 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 a first identification information, the first identification information includes a second identification information and / or a third identification information, the second identification information is determined based on a source identifier 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 a member identifier of a terminal device in a communication group. The 11th parameter is 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, characterized in that A method for sidelink transmission according to any one of claims 17 to 30.

32. The fact that the dedicated RB occupied by the first PSFCH is determined from the second candidate transmission resource set based on the 21st parameter means that The dedicated RB occupied by the first PSFCH is determined based on an 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 21st parameter, characterized in that The method for sidelink transmission according to claim 31.

33. 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 a second candidate transmission resource set, characterized in that The method for sidelink transmission according to claim 17.

34. The third candidate transmission resource set is determined from the second candidate transmission resource set based on the twelfth parameter, the twelfth parameter includes one or more of the second parameter, the third parameter, the fourth parameter, the fifth parameter, the sixth parameter, and the eleventh parameter. The second parameter is determined based on the index corresponding to the first subchannel of the transmission resource of the first PSSCH, the index corresponding to the first interlace, or the index corresponding to the first RB. The third parameter is determined based on the number of subchannels, interlaces, or RBs included in the transmission resources of the first PSSCH. The fourth parameter is determined based on the time slot index corresponding to the transmission resource of the first PSSCH, The fifth parameter is determined based on the index of the RB set corresponding to the transmission resource of the first PSSCH, The sixth parameter is determined based on the number of RB sets corresponding to the transmission resources of the first PSSCH, The 11th parameter is determined based on the total number of resources included in the second candidate transmission resource set, characterized in that The method for sidelink transmission according to claim 33.

35. The dedicated RB occupied by the first PSFCH is determined from the third candidate transmission resource set based on the 13th parameter, the 13th parameter includes one or more of the 3rd parameter, 5th parameter, 6th parameter, 9th parameter, and 14th parameter. The third parameter is determined based on the number of subchannels, interlaces, or RBs included in the transmission resources of the first PSSCH. The fifth parameter is determined based on the index of the RB set corresponding to the transmission resource of the first PSSCH, The sixth parameter is determined based on the number of RB sets corresponding to the transmission resources of the first PSSCH, The ninth parameter is determined based on a first identification information, the first identification information includes a second identification information and / or a third identification information, the second identification information is determined based on a source identifier 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 a member identifier of a terminal device in a communication group. The 14th parameter is determined based on the total number of resources included in the third candidate transmission resource set. The method for sidelink transmission according to claim 33 or 34.

36. The fact that the second candidate transmission resource set is determined based on the PSFCH transmission opportunity index means that The process includes determining one or more RB sets available for transmission of the first PSFCH based on the PSFCH transmission opportunity index, and the one or more RB sets constituting 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. The present invention is characterized in that one or more interlaces available for transmission of the first PSFCH are determined from the second candidate transmission resource set based on the twelfth parameter, and the one or more interlaces constitute the third candidate transmission resource set. The method for sidelink transmission according to claim 34 or 35.

37. The transmission resources within the second candidate transmission resource are indexed first in order of the lowest RB set index, and then in order of the lowest interlace index, or The transmission resources within the second candidate transmission resource are indexed first in order of increasing interlace index, and then in order of increasing RB set index, characterized in that The method for sidelink transmission according to claim 36.

38. The transmission resources within the third candidate transmission resource are indexed first in descending order of interlace index, then in descending order of resource block group index, and finally in descending order of code area resource index, or The transmission resources within the third candidate transmission resource are indexed first in descending order of resource block group index, then in descending order of interlace index, and finally in descending order of code area resource index. The method for sidelink transmission according to claim 36 or 37.

39. The fact that the second candidate transmission resource set is determined based on the PSFCH transmission opportunity index means that The process includes determining one or more RB sets available for transmission of the first PSFCH based on the PSFCH transmission opportunity index, and the one or more RB sets constituting 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. The present invention is characterized in that one or more resource block groups available for transmission of 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. The method for sidelink transmission according to claim 34 or 35.

40. The transmission resources within the second candidate transmission resource are indexed first in ascending order of RB set index, then in ascending order of interlace index, and finally in ascending order of resource block group index, or The transmission resources within the second candidate transmission resource are indexed first in ascending order of resource block group index, then in ascending order of interlace index, and finally in ascending order of RB set index, or The transmission resources within the second candidate transmission resource are indexed first in descending order of interlace index, then in descending order of RB set index, and finally in descending order of resource block group index, or The transmission resources within the second candidate transmission resource are indexed first in descending order of interlace index, then in descending order of resource block group index, and finally in descending order of RB set index. The method for sidelink transmission according to claim 39.

41. The transmission resources within the third candidate transmission resource are indexed first in descending order of resource block group index, and then in descending order of code area resource index, characterized in that A method for sidelink transmission according to claim 39 or 40.

42. The fact that the second candidate transmission resource set is determined based on the PSFCH transmission opportunity index means that The first PSFCH includes determining one or more interlaces available for transmission based on the PSFCH transmission opportunity index, and the one or more interlaces 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. The present invention is characterized in that one or more interlaces available for transmission of the first PSFCH are determined from the second candidate transmission resource set based on the twelfth parameter, and the one or more interlaces constitute the third candidate transmission resource set. The method for sidelink transmission according to claim 34 or 35.

43. The second candidate transmission resource set is characterized in that it is indexed in descending order of interlace index. The method for sidelink transmission according to claim 42.

44. The transmission resources within the third candidate transmission resource are indexed first in descending order of interlace index, then in descending order of resource block group index, and finally in descending order of code area resource index, or The transmission resources within the third candidate transmission resource are indexed first in descending order of resource block group index, then in descending order of interlace index, and finally in descending order of code area resource index. The method for sidelink transmission according to claim 42 or 43.

45. The fact that the second candidate transmission resource set is determined based on the PSFCH transmission opportunity index means that The first PSFCH includes determining one or more interlaces available for transmission based on the PSFCH transmission opportunity index, and the one or more interlaces 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. The present invention is characterized in that one or more resource block groups available for transmission of 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. The method for sidelink transmission according to claim 34 or 35.

46. The transmission resources within the second candidate transmission resource are indexed first in descending order of interlace index, and then in descending order of resource block group index, or The transmission resources within the second candidate transmission resource are indexed first in descending order of resource block group index, and then in descending order of interlace index, characterized in that The method for sidelink transmission according to claim 45.

47. The transmission resources within the third candidate transmission resource are indexed first in descending order of resource block group index, and then in descending order of code area resource index, characterized in that The method for sidelink transmission according to claim 45 or 46.

48. The fact that the second candidate transmission resource set is determined based on the PSFCH transmission opportunity index means that The first PSFCH includes determining one or more resource block groups available for transmission 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. The present invention is characterized in that one or more resource block groups available for transmission of 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. The method for sidelink transmission according to claim 34 or 35.

49. The transmission resources within the second candidate transmission resource are indexed in descending order of resource block group index, characterized in that The method for sidelink transmission according to claim 48.

50. The transmission resources within the third candidate transmission resource are indexed first in descending order of resource block group index, and then in descending order of code area resource index, characterized in that The method for sidelink transmission according to claim 48 or 49.

51. The fact that the dedicated RB occupied by the first PSFCH is determined from the third candidate transmission resource set based on the thirteenth parameter means that The dedicated RB occupied by the first PSFCH is determined based on an 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, characterized in that A method for sidelink transmission according to claim 38, 41, 44, 47, or 50.

52. The dedicated RB occupied by the first PSFCH is determined from a fourth candidate transmission resource set, the fourth candidate transmission resource set is determined based on a 15th parameter, the 15th parameter includes one or more of the second, third, fourth, fifth, and sixth parameters. The second parameter is determined based on the index corresponding to the first subchannel of the transmission resource of the first PSSCH, the index corresponding to the first interlace, or the index corresponding to the first RB. The third parameter is determined based on the number of subchannels, interlaces, or RBs included in the transmission resources of the first PSSCH. The fourth parameter is determined based on the time slot index corresponding to the transmission resource of the first PSSCH, The fifth parameter is determined based on the index of the RB set corresponding to the transmission resource of the first PSSCH, The 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, characterized in that A method for sidelink transmission according to claim 1 or 2.

53. The fact that the fourth candidate transmission resource set is determined based on the fifteenth parameter means that The present invention is characterized in that one or more RB sets available for transmission of the first PSFCH are determined based on the 15th parameter, and the one or more RB sets constitute the fourth candidate transmission resource set. The method for sidelink transmission according to claim 52.

54. The transmission resources within the fourth candidate transmission resource set are indexed first in ascending order of RB set index, then in ascending order of interlace index, then in ascending order of resource block group index, and finally in ascending order of code area resource index, or The transmission resources within the fourth candidate transmission resource set are indexed first in ascending order of interlace 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 area resource index, or The transmission resources within the fourth candidate transmission resource set are indexed first in ascending order of interlace 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 area resource index, or The transmission resources within the fourth candidate transmission resource set are indexed in ascending order of resource block group index, then in ascending order of interlace index, then in ascending order of RB set index, and finally in ascending order of code area resource index. The method for sidelink transmission according to claim 53.

55. The fact that the fourth candidate transmission resource set is determined based on the fifteenth parameter means that The present invention is characterized in that one or more interlaces available for transmission of the first PSFCH are determined based on the 15th parameter, and the one or more interlaces constitute the fourth candidate transmission resource set. The method for sidelink transmission according to claim 52.

56. The transmission resources in the fourth candidate transmission resource set are indexed first in ascending order of interlace index, then in ascending order of resource block group index, and finally in ascending order of code area resource index, or The transmission resources within the fourth candidate transmission resource set are indexed first in descending order of resource block group index, then in descending order of interlace index, and finally in descending order of code area resource index. The method for sidelink transmission according to claim 55.

57. The fact that the fourth candidate transmission resource set is determined based on the fifteenth parameter means that The present invention is characterized in that one or more resource block groups available for transmission of the first PSFCH are determined based on the 15th parameter, and the one or more resource block groups constitute the fourth candidate transmission resource set. The method for sidelink transmission according to claim 52.

58. The transmission resources within the fourth candidate transmission resource set are indexed first in descending order of resource block group index, and then in descending order of code area resource index, characterized in that The method for sidelink transmission according to claim 55.

59. The dedicated RB occupied by the first PSFCH is determined from the fourth candidate transmission resource set based on the sixteenth parameter, the sixteenth parameter includes one or more of the third, fifth, sixth, seventh, eighth, ninth, and seventeenth parameters, The third parameter is determined based on the number of subchannels, interlaces, or RBs included in the transmission resources of the first PSSCH. The fifth parameter is determined based on the index of the RB set corresponding to the transmission resource of the first PSSCH, The sixth parameter is determined based on the number of RB sets corresponding to the transmission resources of the first PSSCH, The seventh parameter is determined based on the index of transmission opportunities 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 a first identification information, the first identification information includes a second identification information and / or a third identification information, the second identification information is determined based on a source identifier 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 a member identifier of a terminal device in a communication group. The 17th parameter is determined based on the total number of resources included in the 4th candidate transmission resource set. The first PSSCH is associated with the first PSFCH, characterized in that A method for sidelink transmission according to any one of claims 52 to 58.

60. The fact that the dedicated RB occupied by the first PSFCH is determined from the fourth candidate transmission resource set based on the sixteenth parameter means that The method is characterized by determining an index corresponding to the transmission resource of the first PSFCH from the fourth candidate transmission resource set based on the sixteenth parameter, and determining a dedicated RB to be occupied by the first PSFCH based on the index. The method for sidelink transmission according to claim 59.

61. 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 a fourth candidate transmission resource set, characterized in that The method for sidelink transmission according to claim 52.

62. The fifth candidate transmission resource set is determined from the fourth candidate transmission resource set based on the eighteenth parameter, the eighteenth parameter including one or more of the seventh parameter, the eighth parameter, and the seventeenth parameter. The seventh parameter is determined based on the index of transmission opportunities corresponding to the first PSFCH, The eighth parameter is determined based on the total number of transmission opportunities corresponding to the first PSFCH, The 17th parameter is determined based on the total number of resources in the 4th candidate transmission resource set, characterized in that The method for sidelink transmission according to claim 61.

63. The dedicated RB occupied by the first PSFCH is determined from the fifth candidate transmission resource set based on the 19th parameter, the 19th parameter includes one or more of the third, fifth, sixth, ninth, and 20th parameters. The third parameter is determined based on the number of subchannels, interlaces, or RBs included in the transmission resources of the first PSSCH. The fifth parameter is determined based on the index of the RB set corresponding to the transmission resource of the first PSSCH, The sixth parameter is determined based on the number of RB sets corresponding to the transmission resources of the first PSSCH, The ninth parameter is determined based on a first identification information, the first identification information includes a second identification information and / or a third identification information, the second identification information is determined based on a source identifier 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 a member identifier of a terminal device in a communication group. The 20th parameter is determined based on the total number of resources in the fifth candidate transmission resource set, characterized in that The method for sidelink transmission according to claim 61 or 62.

64. The fact that the fourth candidate transmission resource set is determined based on the fifteenth parameter means that The process includes determining one or more RB sets available for transmission of the first PSFCH based on the 15th parameter, and the one or more RB sets constituting the fourth candidate transmission resource set. The fact that the fifth candidate transmission resource set is determined from the fourth candidate transmission resource set based on the eighteenth parameter means that The present invention is characterized in that one or more interlaces available for transmission of the first PSFCH are determined from the fourth candidate transmission resource set based on the eighteenth parameter, and the one or more interlaces constitute the fifth candidate transmission resource set. The method for sidelink transmission according to claim 62 or 63.

65. The transmission resources within the fourth candidate transmission resource are first indexed in descending order of RB set index, then in descending order of interlace index, or The transmission resources within the fourth candidate transmission resource are indexed first in order of increasing interlace index, and then in order of increasing RB set index, characterized in that The method for sidelink transmission according to claim 64.

66. The transmission resources within the fifth candidate transmission resource are indexed first in descending order of interlace index, then in descending order of resource block group index, and finally in descending order of code area resource index, or The transmission resources within the fifth candidate transmission resource are indexed first in descending order of resource block group index, then in descending order of interlace index, and finally in descending order of code area resource index. The method for sidelink transmission according to claim 64 or 65.

67. The fact that the fourth candidate transmission resource set is determined based on the fifteenth parameter means that The process includes determining one or more RB sets available for transmission of the first PSFCH based on the 15th parameter, and the one or more RB sets constituting the fourth candidate transmission resource set. The fact that the fifth candidate transmission resource set is determined from the fourth candidate transmission resource set based on the eighteenth parameter means that The present invention is characterized in that one or more resource block groups available for transmission of the first PSFCH are determined from the fourth candidate transmission resource set based on the 18th parameter, and the one or more resource block groups constitute the fifth candidate transmission resource set. The method for sidelink transmission according to claim 62 or 63.

68. The transmission resources within the fourth candidate transmission resource are indexed first in ascending order of RB set index, then in ascending order of interlace index, and finally in ascending order of resource block group index, or The transmission resources within the fourth candidate transmission resource are indexed first in descending order of resource block group index, then in descending order of interlace index, and finally in descending order of RB set index, or The transmission resources within the fourth candidate transmission resource are indexed first in descending order of interlace index, then in descending order of RB set index, and finally in descending order of resource block group index, or The transmission resources within the fourth candidate transmission resource are indexed first in descending order of interlace index, then in descending order of resource block group index, and finally in descending order of RB set index. The method for sidelink transmission according to claim 67.

69. The transmission resources within the fifth candidate transmission resource are indexed first in descending order of resource block group index, and then in descending order of code area resource index, characterized in that The method for sidelink transmission according to claim 67 or 68.

70. The fact that the fourth candidate transmission resource set is determined based on the fifteenth parameter means that The process includes determining one or more interlaces available for transmission of the first PSFCH based on the 15th parameter, and the one or more interlaces constituting the fourth candidate transmission resource set, The fact that the fifth candidate transmission resource set is determined from the fourth candidate transmission resource set based on the eighteenth parameter means that The present invention is characterized in that one or more interlaces available for transmission of the first PSFCH are determined from the fourth candidate transmission resource set based on the eighteenth parameter, and the one or more interlaces constitute the fifth candidate transmission resource set. The method for sidelink transmission according to claim 62 or 63.

71. The transmission resources within the fourth candidate transmission resource are indexed in order of increasing interlace index. The method for sidelink transmission according to claim 70.

72. The transmission resources within the fifth candidate transmission resource are indexed first in descending order of interlace index, then in descending order of resource block group index, and finally in descending order of code area resource index, or The transmission resources within the fifth candidate transmission resource are indexed first in descending order of resource block group index, then in descending order of interlace index, and finally in descending order of code area resource index. The method for sidelink transmission according to claim 70 or 71.

73. The fact that the fourth candidate transmission resource set is determined based on the fifteenth parameter means that The process includes determining one or more interlaces available for transmission of the first PSFCH based on the 15th parameter, and the one or more interlaces constituting the fourth candidate transmission resource set, The fact that the fifth candidate transmission resource set is determined from the fourth candidate transmission resource set based on the eighteenth parameter means that The present invention is characterized in that one or more resource block groups available for transmission of the first PSFCH are determined from the fourth candidate transmission resource set based on the 18th parameter, and the one or more resource block groups constitute the fifth candidate transmission resource set. The method for sidelink transmission according to claim 62 or 63.

74. The transmission resources within the fourth candidate transmission resource are first indexed in descending order of interlace index, then in descending order of resource block group index, or The transmission resources within the fourth candidate transmission resource are indexed first in descending order of resource block group index, and then in descending order of interlace index, characterized in that The method for sidelink transmission according to claim 73.

75. The transmission resources within the fifth candidate transmission resource are indexed first in descending order of resource block group index, and then in descending order of code area resource index, characterized in that The method for sidelink transmission according to claim 73 or 74.

76. The fact that the fourth candidate transmission resource set is determined based on the fifteenth parameter means that The process includes determining one or more resource block groups available for transmission of the first PSFCH based on the 15th parameter, and the one or more resource block groups constituting the fourth candidate transmission resource set, The fact that the fifth candidate transmission resource set is determined from the fourth candidate transmission resource set based on the eighteenth parameter means that The present invention is characterized in that one or more resource block groups available for transmission of the first PSFCH are determined from the fourth candidate transmission resource set based on the 18th parameter, and the one or more resource block groups constitute the fifth candidate transmission resource set. The method for sidelink transmission according to claim 62 or 63.

77. The transmission resources within the fourth candidate transmission resource are indexed in descending order of resource block group index, characterized in that The method for sidelink transmission according to claim 76.

78. The transmission resources within the fifth candidate transmission resource are indexed first in descending order of resource block group index, and then in descending order of code area resource index, characterized in that The method for sidelink transmission according to claim 76 or 77.

79. The transmission resources occupied by the first PSFCH are determined from the fifth candidate transmission resource set based on the 19th parameter. The method is characterized by determining an index corresponding to the transmission resource of the first PSFCH from the fifth candidate transmission resource set based on the 19th parameter, and determining a dedicated RB to be occupied by the first PSFCH based on the index. A method for sidelink transmission according to claim 66, 69, 72, 75, or 78.

80. 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 interlacing, characterized in that A method for sidelink transmission according to any one of claims 1 to 79.

81. 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 sidelink feedback channel (PSFCH). The first terminal device includes determining the transmission resource of the first PSFCH from within the second RB set, characterized in that A method for sidelink transmission according to any one of claims 1 to 80.

82. The first terminal device determines the transmission resource of the first PSFCH from within the second RB set, Index information corresponding to the second RB set, The index corresponding to the first subchannel in the second RB set of the transmission resource of the first PSSCH, the index corresponding to the first interlace, or the index corresponding to the first RB, The number of subchannels, interlaces, or RBs included in the second RB set of the transmission resources of the first PSSCH, 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 terminal device determines the transmission resource of the first PSFCH from within the second RB set based on one or more parameters referred to as first identification information, The first identification information includes a second identification information and / or a third identification information, wherein the second identification information is determined based on a source identifier included in the first SCI, the first SCI is used to schedule the first PSSCH, and the third identification information is either 0 or determined based on a member identifier of a terminal device in a communication group. The method for sidelink transmission according to claim 81.

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

84. The transmission resources of the first PSSCH further include a third RB set, and the first terminal device determines the transmission resources of the first physical sidelink feedback channel (PSFCH). The first terminal device is characterized by determining the transmission resource of the first PSFCH from within the third RB set. A method for sidelink transmission according to any one of claims 81 to 83.

85. The first terminal device determines the transmission resource of the first PSFCH from within the third RB set, The present invention is characterized in that, within the time domain resource corresponding to the first PSFCH transmission resource, if the first terminal device does not have a PSFCH waiting to be transmitted within the third RB set, the first terminal device determines a transmission resource for the first PSFCH from within the third RB set. The method for sidelink transmission according to claim 84.

86. When the transmission resources of the first PSSCH correspond to multiple RB sets, the first terminal device determines the transmission resources of the first PSFCH from among the multiple RB sets, characterized in that A method for sidelink transmission according to any one of claims 81 to 83.

87. The transmission resources of the first PSSCH further include a third RB set, and the method further includes The first terminal device includes determining the transmission resources of the third PSFCH from within the third RB set, The transmission resources of the third PSFCH include common interlacing within the third RB set, and the time-domain resources of the third PSFCH and the first PSFCH are the same. A method for sidelink transmission according to any one of claims 81 to 83.

88. The first terminal device determines the transmission resource of the third PSFCH from within the third RB set, The present invention is characterized in that, within the time domain resource corresponding to the first PSFCH transmission resource, if the first terminal device does not have a PSFCH waiting to be transmitted within the third RB set, the first terminal device determines the transmission resource for the third PSFCH from within the third RB set. The method for sidelink transmission according to claim 87.

89. The above method further, The first terminal device is characterized by transmitting the first PSFCH and the third PSFCH. The method for sidelink transmission according to claim 87 or 88.

90. A terminal device, wherein the terminal device is a first terminal device, and the terminal device is Includes a decision unit configured to determine the transmission resources of the first physical side-link feedback channel (PSFCH), The transmission resources of the first PSFCH are The common interlace occupied by the first PSFCH, and A terminal device including one or more dedicated resource blocks (RBs) occupied by the first PSFCH.

91. The aforementioned common interlacing is Protocol predefined information, Pre-set information, Network device configuration information, and Determined based on one or more of the instruction information transmitted by the target terminal device, The target terminal device is a terminal device that transmits the first PSFCH, a terminal device that receives the first PSFCH, a terminal device that transmits the first physical sidelink shared channel (PSSCH), or a terminal device that receives the first PSSCH, wherein the first PSSCH is associated with the first PSFCH. The terminal device according to claim 90.

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

93. The transmission resources in the first candidate transmission resource set are indexed first in ascending order of available RB set index, then in ascending order of interlace index, then in ascending order of resource block group index, and finally in ascending order of code area resource index, or The transmission resources in the first candidate transmission resource set are indexed first in ascending order of interlace index, then in ascending order of resource block group index, then in ascending order of available RB set index, and finally in ascending order of code area resource index, or The transmission resources within the first candidate transmission resource set are indexed first in ascending order of interlace index, then in ascending order of available RB set index, then in ascending order of resource block group index, and finally in ascending order of code area resource index, or The transmission resources in the first candidate transmission resource set are indexed in ascending order of resource block group index, then in ascending order of interlace index, then in ascending order of available RB set index, and finally in ascending order of code area resource index. The terminal device according to claim 92.

94. The available RB sets are: 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 The determination is made based on one or more of the following: 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 PSFCH. The first PSSCH is associated with the first PSFCH, characterized in that The terminal device according to claim 93.

95. If the transmission opportunity corresponding to the first PSFCH is the first PSFCH transmission opportunity among the N PSFCH transmission opportunities, then the available RB set includes the RB set corresponding to the transmission resource of the first PSFCH, 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, characterized in that The terminal device according to claim 94.

96. The frequency domain range of one interlace within the first candidate transmission resource set corresponds to the frequency domain range of one interlace within one RB set. The terminal device according to any one of claims 93 to 95.

97. The interlacing within the first candidate transmission resource set does not include the common interlacing, characterized in that The terminal device according to any one of claims 93 to 96.

98. The interlacing available for PSFCH transmission, configured for different RB sets within the resource pool, is configured independently. The terminal device according to any one of claims 93 to 97.

99. The resource block group is characterized in that one resource block group corresponds to K3 RBs in one interlace, where K3 is equal to the number of dedicated RBs, and K3 is a positive integer of 1 or more. The terminal device according to any one of claims 93 to 98.

100. If one interlace contains A RBs, the number of resource block groups contained in the one interlace is [Math 5] It is equal to and A is a positive integer greater than or equal to 1, [Math 6] This is characterized by representing the number of combinations formed by arbitrarily selecting K3 elements from A elements. The terminal device according to claim 99.

101. When one interlace contains A RBs, the number of resource block groups contained in the one interlace is equal to floor(A / K3), where A is a positive integer of 1 or more, and floor represents truncation. The terminal device according to claim 99.

102. The characteristic is that when one interlace contains A RBs and K3 = 1, the number of resource block groups contained in the one interlace is equal to A, and A is a positive integer of 1 or more. The terminal device according to claim 99.

103. When a single RB set includes a first interlace and a second interlace, the number of RBs included in the first interlace and the second interlace is either the same or different. The terminal device according to any one of claims 93 to 102.

104. The number of the aforementioned code area resources is The number of code-splittable cyclic shift pairs within a single RB, and This is characterized by being determined based on one or more of the number of resources that can be code-split multiplexed between RBs included in a single resource block group. A terminal device according to any one of claims 93 to 103.

105. The dedicated RB occupied by the first PSFCH is determined from the first candidate transmission resource set based on a first parameter, the first parameter includes one or more of the second, third, fourth, fifth, sixth, seventh, eighth, ninth, and tenth parameters, The second parameter is determined based on the index corresponding to the first subchannel of the transmission resource of the first PSSCH, the index corresponding to the first interlace, or the index corresponding to the first RB. The third parameter is determined based on the number of subchannels, interlaces, or RBs included in the transmission resources of the first PSSCH. The fourth parameter is determined based on the time slot index corresponding to the transmission resource of the first PSSCH, The fifth parameter is determined based on the index of the RB set corresponding to the transmission resource of the first PSSCH, The sixth parameter is determined based on the number of RB sets corresponding to the transmission resources of the first PSSCH, The seventh parameter is determined based on the index of transmission opportunities 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 a first identification information, the first identification information includes a second identification information and / or a third identification information, the second identification information is determined based on a source identifier included in the first sidelink 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 a member identifier of a terminal device in a communication group. The tenth parameter is 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, characterized in that A terminal device according to any one of claims 93 to 104.

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

107. The number of transmission resources included in the second candidate transmission resource set is determined based on one or more of the first number, second number, third number, and fourth number. The 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 interlaces available for PSFCH transmission included in one of the RB sets within the first RB set. The third number is determined based on the number of resource block groups available for PSFCH transmission included in one interlace within one RB set. The fourth number is determined based on the number N of PSFCH transmission opportunities, The terminal device according to claim 106.

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

109. The number of RB sets included in the second candidate transmission resource set L ０ is, L ０ = A / N, or L ０ The formula satisfies = floor(A / N), where A represents the first number and floor represents truncation. The terminal device according to claim 107 or 108.

110. The fact that the second candidate transmission resource set is determined based on the PSFCH transmission opportunity index means that The present invention is characterized in that one or more RB sets available for transmission of 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 terminal device according to any one of claims 106 to 109.

111. The transmission resources in the second candidate transmission resource set are indexed first in ascending order of RB set index, then in ascending order of interlace index, then in ascending order of resource block group index, and finally in ascending order of code area resource index, or The transmission resources in the second candidate transmission resource set are indexed first in ascending order of interlace 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 area resource index, or The transmission resources within the second candidate transmission resource set are indexed first in ascending order of interlace 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 area resource index, or The transmission resources in the second candidate transmission resource set are indexed in ascending order of resource block group index, then in ascending order of interlace index, then in ascending order of RB set index, and finally in ascending order of code area resource index. The terminal device according to claim 110.

112. 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, characterized in that The terminal device according to claim 107.

113. The number of interlaces L included in the second candidate transmission resource set. １ teeth, [Number 7] The following conditions are met, where A represents the first number, and B ａ The characteristics are that represents the second number, N represents the fourth number, floor represents truncation, a is an integer, and the range of the value of a is [0, A-1]. The terminal device according to claim 107 or 112.

114. The fact that the second candidate transmission resource set is determined based on the PSFCH transmission opportunity index means that The present invention is characterized in that one or more interlaces available for transmission of the first PSFCH are determined based on the PSFCH transmission opportunity index, and the one or more interlaces constitute the second candidate transmission resource set. The terminal device according to claim 106, 107, 112, or 113.

115. The transmission resources in the second candidate transmission resource set are indexed first in ascending order of interlace index, then in ascending order of resource block group index, and finally in ascending order of code area resource index, or The transmission resources in the second candidate transmission resource set are indexed first in descending order of resource block group index, then in descending order of interlace index, and finally in descending order of code area resource index. The terminal device according to claim 114.

116. 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, characterized in that The terminal device according to claim 107.

117. The number of resource block groups L included in the second candidate transmission resource set. ２ teeth, [Number 8] The following conditions are met, where A represents the first number, and B ａ represents the second number, C ａ，ｂ represents the third number, N represents the fourth number, floor represents truncation, both a and b are integers, the range of a's value is [0, A-1], and the range of b's value is [0, B ａ -1] is characterized by The terminal device according to claim 116.

118. The fact that the second candidate transmission resource set is determined based on the PSFCH transmission opportunity index means that The present invention is characterized in that one or more RB resource block groups available for transmission of 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 terminal device according to claim 106, 107, 116, or 117.

119. The transmission resources in the second candidate transmission resource set are indexed first in descending order of resource block group index, and then in descending order of code area resource index, characterized in that The terminal device according to claim 118.

120. The dedicated RB occupied by the first PSFCH is determined from the second candidate transmission resource set based on the 21st parameter, the 21st parameter includes one or more of the 2nd, 3rd, 4th, 5th, 6th, 7th, 8th, 9th, and 11th parameters, The second parameter is determined based on the index corresponding to the first subchannel of the transmission resource of the first PSSCH, the index corresponding to the first interlace, or the index corresponding to the first RB. The third parameter is determined based on the number of subchannels, interlaces, or RBs included in the transmission resources of the first PSSCH. The fourth parameter is determined based on the time slot index corresponding to the transmission resource of the first PSSCH, The fifth parameter is determined based on the index of the RB set corresponding to the transmission resource of the first PSSCH, The sixth parameter is determined based on the number of RB sets corresponding to the transmission resources of the first PSSCH, The seventh parameter is determined based on the index of transmission opportunities 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 a first identification information, the first identification information includes a second identification information and / or a third identification information, the second identification information is determined based on a source identifier 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 a member identifier of a terminal device in a communication group. The 11th parameter is 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, characterized in that A terminal device according to any one of claims 106 to 119.

121. The fact that the dedicated RB occupied by the first PSFCH is determined from the second candidate transmission resource set based on the 21st parameter means that The dedicated RB occupied by the first PSFCH is determined based on an 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 21st parameter, characterized in that The terminal device according to claim 120.

122. 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 a second candidate transmission resource set, characterized in that The terminal device according to claim 106.

123. The third candidate transmission resource set is determined from the second candidate transmission resource set based on the twelfth parameter, the twelfth parameter includes one or more of the second parameter, the third parameter, the fourth parameter, the fifth parameter, the sixth parameter, and the eleventh parameter. The second parameter is determined based on the index corresponding to the first subchannel of the transmission resource of the first PSSCH, the index corresponding to the first interlace, or the index corresponding to the first RB. The third parameter is determined based on the number of subchannels, interlaces, or RBs included in the transmission resources of the first PSSCH. The fourth parameter is determined based on the time slot index corresponding to the transmission resource of the first PSSCH, The fifth parameter is determined based on the index of the RB set corresponding to the transmission resource of the first PSSCH, The sixth parameter is determined based on the number of RB sets corresponding to the transmission resources of the first PSSCH, The 11th parameter is determined based on the total number of resources included in the second candidate transmission resource set, characterized in that The terminal device according to claim 122.

124. The dedicated RB occupied by the first PSFCH is determined from the third candidate transmission resource set based on the 13th parameter, the 13th parameter includes one or more of the 3rd parameter, 5th parameter, 6th parameter, 9th parameter, and 14th parameter. The third parameter is determined based on the number of subchannels, interlaces, or RBs included in the transmission resources of the first PSSCH. The fifth parameter is determined based on the index of the RB set corresponding to the transmission resource of the first PSSCH, The sixth parameter is determined based on the number of RB sets corresponding to the transmission resources of the first PSSCH, The ninth parameter is determined based on a first identification information, the first identification information includes a second identification information and / or a third identification information, the second identification information is determined based on a source identifier 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 a member identifier of a terminal device in a communication group. The 14th parameter is determined based on the total number of resources included in the third candidate transmission resource set. The terminal device according to claim 122 or 123.

125. The fact that the second candidate transmission resource set is determined based on the PSFCH transmission opportunity index means that The process includes determining one or more RB sets available for transmission of the first PSFCH based on the PSFCH transmission opportunity index, and the one or more RB sets constituting 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. The present invention is characterized in that one or more interlaces available for transmission of the first PSFCH are determined from the second candidate transmission resource set based on the twelfth parameter, and the one or more interlaces constitute the third candidate transmission resource set. The terminal device according to claim 123 or 124.

126. The transmission resources within the second candidate transmission resource are indexed first in order of the lowest RB set index, and then in order of the lowest interlace index, or The transmission resources within the second candidate transmission resource are indexed first in order of increasing interlace index, and then in order of increasing RB set index, characterized in that The terminal device according to claim 125.

127. The transmission resources within the third candidate transmission resource are indexed first in descending order of interlace index, then in descending order of resource block group index, and finally in descending order of code area resource index, or The transmission resources within the third candidate transmission resource are indexed first in descending order of resource block group index, then in descending order of interlace index, and finally in descending order of code area resource index. The terminal device according to claim 125 or 126.

128. The fact that the second candidate transmission resource set is determined based on the PSFCH transmission opportunity index means that The process includes determining one or more RB sets available for transmission of the first PSFCH based on the PSFCH transmission opportunity index, and the one or more RB sets constituting 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. The present invention is characterized in that one or more resource block groups available for transmission of 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. The terminal device according to claim 123 or 124.

129. The transmission resources within the second candidate transmission resource are indexed first in ascending order of RB set index, then in ascending order of interlace index, and finally in ascending order of resource block group index, or The transmission resources within the second candidate transmission resource are indexed first in ascending order of resource block group index, then in ascending order of interlace index, and finally in ascending order of RB set index, or The transmission resources within the second candidate transmission resource are indexed first in descending order of interlace index, then in descending order of RB set index, and finally in descending order of resource block group index, or The transmission resources within the second candidate transmission resource are indexed first in descending order of interlace index, then in descending order of resource block group index, and finally in descending order of RB set index. The terminal device according to claim 128.

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

131. The fact that the second candidate transmission resource set is determined based on the PSFCH transmission opportunity index means that The first PSFCH includes determining one or more interlaces available for transmission based on the PSFCH transmission opportunity index, and the one or more interlaces 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. The present invention is characterized in that one or more interlaces available for transmission of the first PSFCH are determined from the second candidate transmission resource set based on the twelfth parameter, and the one or more interlaces constitute the third candidate transmission resource set. The terminal device according to claim 123 or 124.

132. The second candidate transmission resource set is characterized in that it is indexed in descending order of interlace index. The terminal device according to claim 131.

133. The transmission resources within the third candidate transmission resource are indexed first in descending order of interlace index, then in descending order of resource block group index, and finally in descending order of code area resource index, or The transmission resources within the third candidate transmission resource are indexed first in descending order of resource block group index, then in descending order of interlace index, and finally in descending order of code area resource index. The terminal device according to claim 131 or 132.

134. The fact that the second candidate transmission resource set is determined based on the PSFCH transmission opportunity index means that The first PSFCH includes determining one or more interlaces available for transmission based on the PSFCH transmission opportunity index, and the one or more interlaces 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. The present invention is characterized in that one or more resource block groups available for transmission of 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. The terminal device according to claim 123 or 124.

135. The transmission resources within the second candidate transmission resource are indexed first in descending order of interlace index, and then in descending order of resource block group index, or The transmission resources within the second candidate transmission resource are indexed first in descending order of resource block group index, and then in descending order of interlace index, characterized in that The terminal device according to claim 134.

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

137. The fact that the second candidate transmission resource set is determined based on the PSFCH transmission opportunity index means that The first PSFCH includes determining one or more resource block groups available for transmission 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. The present invention is characterized in that one or more resource block groups available for transmission of 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. The terminal device according to claim 123 or 124.

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

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

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

141. The dedicated RB occupied by the first PSFCH is determined from a fourth candidate transmission resource set, the fourth candidate transmission resource set is determined based on a 15th parameter, the 15th parameter includes one or more of the second, third, fourth, fifth, and sixth parameters. The second parameter is determined based on the index corresponding to the first subchannel of the transmission resource of the first PSSCH, the index corresponding to the first interlace, or the index corresponding to the first RB. The third parameter is determined based on the number of subchannels, interlaces, or RBs included in the transmission resources of the first PSSCH. The fourth parameter is determined based on the time slot index corresponding to the transmission resource of the first PSSCH, The fifth parameter is determined based on the index of the RB set corresponding to the transmission resource of the first PSSCH, The 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, characterized in that The terminal device according to claim 90 or 91.

142. The fact that the fourth candidate transmission resource set is determined based on the fifteenth parameter means that The present invention is characterized in that one or more RB sets available for transmission of the first PSFCH are determined based on the 15th parameter, and the one or more RB sets constitute the fourth candidate transmission resource set. The terminal device according to claim 141.

143. The transmission resources within the fourth candidate transmission resource set are indexed first in ascending order of RB set index, then in ascending order of interlace index, then in ascending order of resource block group index, and finally in ascending order of code area resource index, or The transmission resources within the fourth candidate transmission resource set are indexed first in ascending order of interlace 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 area resource index, or The transmission resources within the fourth candidate transmission resource set are indexed first in ascending order of interlace 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 area resource index, or The transmission resources within the fourth candidate transmission resource set are indexed in ascending order of resource block group index, then in ascending order of interlace index, then in ascending order of RB set index, and finally in ascending order of code area resource index. The terminal device according to claim 142.

144. The fact that the fourth candidate transmission resource set is determined based on the fifteenth parameter means that The present invention is characterized in that one or more interlaces available for transmission of the first PSFCH are determined based on the 15th parameter, and the one or more interlaces constitute the fourth candidate transmission resource set. The terminal device according to claim 141.

145. The transmission resources in the fourth candidate transmission resource set are indexed first in ascending order of interlace index, then in ascending order of resource block group index, and finally in ascending order of code area resource index, or The transmission resources within the fourth candidate transmission resource set are indexed first in descending order of resource block group index, then in descending order of interlace index, and finally in descending order of code area resource index. The terminal device according to claim 144.

146. The fact that the fourth candidate transmission resource set is determined based on the fifteenth parameter means that The present invention is characterized in that one or more resource block groups available for transmission of the first PSFCH are determined based on the 15th parameter, and the one or more resource block groups constitute the fourth candidate transmission resource set. The terminal device according to claim 141.

147. The transmission resources within the fourth candidate transmission resource set are indexed first in descending order of resource block group index, and then in descending order of code area resource index, characterized in that The terminal device according to claim 146.

148. The dedicated RB occupied by the first PSFCH is determined from the fourth candidate transmission resource set based on the sixteenth parameter, the sixteenth parameter includes one or more of the third, fifth, sixth, seventh, eighth, ninth, and seventeenth parameters, The third parameter is determined based on the number of subchannels, interlaces, or RBs included in the transmission resources of the first PSSCH. The fifth parameter is determined based on the index of the RB set corresponding to the transmission resource of the first PSSCH, The sixth parameter is determined based on the number of RB sets corresponding to the transmission resources of the first PSSCH, The seventh parameter is determined based on the index of transmission opportunities 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 a first identification information, the first identification information includes a second identification information and / or a third identification information, the second identification information is determined based on a source identifier 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 a member identifier of a terminal device in a communication group. The 17th parameter is determined based on the total number of resources included in the 4th candidate transmission resource set. The first PSSCH is associated with the first PSFCH, characterized in that The terminal device according to any one of claims 141 to 147.

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

150. 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 a fourth candidate transmission resource set, characterized in that The terminal device according to claim 141.

151. The fifth candidate transmission resource set is determined from the fourth candidate transmission resource set based on the eighteenth parameter, the eighteenth parameter including one or more of the seventh parameter, the eighth parameter, and the seventeenth parameter. The seventh parameter is determined based on the index of transmission opportunities corresponding to the first PSFCH, The eighth parameter is determined based on the total number of transmission opportunities corresponding to the first PSFCH, The 17th parameter is determined based on the total number of resources in the 4th candidate transmission resource set, characterized in that The terminal device according to claim 150.

152. The dedicated RB occupied by the first PSFCH is determined from the fifth candidate transmission resource set based on the 19th parameter, the 19th parameter includes one or more of the third, fifth, sixth, ninth, and 20th parameters. The third parameter is determined based on the number of subchannels, interlaces, or RBs included in the transmission resources of the first PSSCH. The fifth parameter is determined based on the index of the RB set corresponding to the transmission resource of the first PSSCH, The sixth parameter is determined based on the number of RB sets corresponding to the transmission resources of the first PSSCH, The ninth parameter is determined based on a first identification information, the first identification information includes a second identification information and / or a third identification information, the second identification information is determined based on a source identifier 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 a member identifier of a terminal device in a communication group. The 20th parameter is determined based on the total number of resources in the fifth candidate transmission resource set, characterized in that The terminal device according to claim 150 or 151.

153. The fact that the fourth candidate transmission resource set is determined based on the fifteenth parameter means that The process includes determining one or more RB sets available for transmission of the first PSFCH based on the 15th parameter, and the one or more RB sets constituting the fourth candidate transmission resource set. The fact that the fifth candidate transmission resource set is determined from the fourth candidate transmission resource set based on the eighteenth parameter means that The present invention is characterized in that one or more interlaces available for transmission of the first PSFCH are determined from the fourth candidate transmission resource set based on the eighteenth parameter, and the one or more interlaces constitute the fifth candidate transmission resource set. The terminal device according to claim 150 or 151.

154. The transmission resources within the fourth candidate transmission resource are first indexed in descending order of RB set index, then in descending order of interlace index, or The transmission resources within the fourth candidate transmission resource are indexed first in order of increasing interlace index, and then in order of increasing RB set index, characterized in that The terminal device according to claim 153.

155. The transmission resources within the fifth candidate transmission resource are indexed first in descending order of interlace index, then in descending order of resource block group index, and finally in descending order of code area resource index, or The transmission resources within the fifth candidate transmission resource are indexed first in descending order of resource block group index, then in descending order of interlace index, and finally in descending order of code area resource index. The terminal device according to claim 153 or 154.

156. The fact that the fourth candidate transmission resource set is determined based on the fifteenth parameter means that The process includes determining one or more RB sets available for transmission of the first PSFCH based on the 15th parameter, and the one or more RB sets constituting the fourth candidate transmission resource set. The fact that the fifth candidate transmission resource set is determined from the fourth candidate transmission resource set based on the eighteenth parameter means that The present invention is characterized in that one or more resource block groups available for transmission of the first PSFCH are determined from the fourth candidate transmission resource set based on the 18th parameter, and the one or more resource block groups constitute the fifth candidate transmission resource set. The terminal device according to claim 151 or 152.

157. The transmission resources within the fourth candidate transmission resource are indexed first in ascending order of RB set index, then in ascending order of interlace index, and finally in ascending order of resource block group index, or The transmission resources within the fourth candidate transmission resource are indexed first in descending order of resource block group index, then in descending order of interlace index, and finally in descending order of RB set index, or The transmission resources within the fourth candidate transmission resource are indexed first in descending order of interlace index, then in descending order of RB set index, and finally in descending order of resource block group index, or The transmission resources within the fourth candidate transmission resource are indexed first in descending order of interlace index, then in descending order of resource block group index, and finally in descending order of RB set index. The terminal device according to claim 156.

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

159. The fact that the fourth candidate transmission resource set is determined based on the fifteenth parameter means that The process includes determining one or more interlaces available for transmission of the first PSFCH based on the 15th parameter, and the one or more interlaces constituting the fourth candidate transmission resource set, The fact that the fifth candidate transmission resource set is determined from the fourth candidate transmission resource set based on the eighteenth parameter means that The present invention is characterized in that one or more interlaces available for transmission of the first PSFCH are determined from the fourth candidate transmission resource set based on the eighteenth parameter, and the one or more interlaces constitute the fifth candidate transmission resource set. The terminal device according to claim 151 or 152.

160. The transmission resources within the fourth candidate transmission resource are indexed in order of increasing interlace index. The terminal device according to claim 159.

161. The transmission resources within the fifth candidate transmission resource are indexed first in descending order of interlace index, then in descending order of resource block group index, and finally in descending order of code area resource index, or The transmission resources within the fifth candidate transmission resource are indexed first in descending order of resource block group index, then in descending order of interlace index, and finally in descending order of code area resource index. The terminal device according to claim 159 or 160.

162. The fact that the fourth candidate transmission resource set is determined based on the fifteenth parameter means that The process includes determining one or more interlaces available for transmission of the first PSFCH based on the 15th parameter, and the one or more interlaces constituting the fourth candidate transmission resource set, The fact that the fifth candidate transmission resource set is determined from the fourth candidate transmission resource set based on the eighteenth parameter means that The present invention is characterized in that one or more resource block groups available for transmission of the first PSFCH are determined from the fourth candidate transmission resource set based on the 18th parameter, and the one or more resource block groups constitute the fifth candidate transmission resource set. The terminal device according to claim 151 or 152.

163. The transmission resources within the fourth candidate transmission resource are first indexed in descending order of interlace index, then in descending order of resource block group index, or The transmission resources within the fourth candidate transmission resource are indexed first in descending order of resource block group index, and then in descending order of interlace index, characterized in that The terminal device according to claim 162.

164. The transmission resources within the fifth candidate transmission resource are indexed first in descending order of resource block group index, and then in descending order of code area resource index, characterized in that The terminal device according to claim 162 or 163.

165. The fact that the fourth candidate transmission resource set is determined based on the fifteenth parameter means that The process includes determining one or more resource block groups available for transmission of the first PSFCH based on the 15th parameter, and the one or more resource block groups constituting the fourth candidate transmission resource set, The fact that the fifth candidate transmission resource set is determined from the fourth candidate transmission resource set based on the eighteenth parameter means that The present invention is characterized in that one or more resource block groups available for transmission of the first PSFCH are determined from the fourth candidate transmission resource set based on the 18th parameter, and the one or more resource block groups constitute the fifth candidate transmission resource set. The terminal device according to claim 151 or 152.

166. The transmission resources within the fourth candidate transmission resource are indexed in descending order of resource block group index, characterized in that The terminal device according to claim 165.

167. The transmission resources within the fifth candidate transmission resource are indexed first in descending order of resource block group index, and then in descending order of code area resource index, characterized in that The terminal device according to claim 165 or 166.

168. The transmission resources occupied by the first PSFCH are determined from the fifth candidate transmission resource set based on the 19th parameter. The method is characterized by determining an index corresponding to the transmission resource of the first PSFCH from the fifth candidate transmission resource set based on the 19th parameter, and determining a dedicated RB to be occupied by the first PSFCH based on the index. The terminal device according to claim 155, 158, 161, 164, or 167.

169. 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 interlacing, characterized in that A terminal device according to any one of claims 90 to 168.

170. The first PSSCH is associated with the first PSFCH, the transmission resources of the first PSSCH include a second RB set, and the decision unit is It is characterized by being configured to determine the transmission resources of the first PSFCH from within the second RB set. A terminal device according to any one of claims 90 to 169.

171. Determining the transmission resources of the first PSFCH from within the second RB set is: Index information corresponding to the second RB set, The index corresponding to the first subchannel in the second RB set of the transmission resource of the first PSSCH, the index corresponding to the first interlace, or the index corresponding to the first RB, The number of subchannels, interlaces, or RBs included in the second RB set of the transmission resources of the first PSSCH, 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, This includes determining the transmission resources of the first PSFCH from within the second RB set based on one or more parameters referred to as first identification information, The first identification information includes a second identification information and / or a third identification information, wherein the second identification information is determined based on a source identifier included in the first SCI, the first SCI is used to schedule the first PSSCH, and the third identification information is either 0 or determined based on a member identifier of a terminal device in a communication group. The terminal device according to claim 170.

172. The second RB set is characterized in that it is the first of one or more RB sets corresponding to the transmission resources of the first PSSCH. The terminal device according to claim 170 or 171.

173. The transmission resources of the first PSSCH further include a third RB set, and the decision unit is It is characterized by being configured to determine the transmission resource of the first PSFCH from within the third RB set. The terminal device according to any one of claims 170 to 172.

174. Determining the transmission resources of the first PSFCH from within the third RB set is: The method is characterized in that, within the time domain resource corresponding to the first PSFCH transmission resource, if the first terminal device does not have a PSFCH waiting to transmit within the third RB set, the method includes determining the transmission resource for the first PSFCH from within the third RB set. The terminal device according to claim 173.

175. When the transmission resources of the first PSSCH correspond to multiple RB sets, the first terminal device determines the transmission resources of the first PSFCH from among the multiple RB sets, characterized in that The terminal device according to any one of claims 170 to 172.

176. The transmission resources of the first PSSCH further include a third RB set, and the terminal equipment further includes Used to determine the transmission resources of the third PSFCH from within the third RB set, The transmission resources of the third PSFCH include common interlacing within the third RB set, and the time-domain resources of the third PSFCH and the first PSFCH are the same. The terminal device according to any one of claims 170 to 172.

177. Determining the transmission resources of the third PSFCH from within the third RB set is: The method is characterized in that, within the time domain resource corresponding to the first PSFCH transmission resource, if the first terminal device does not have a PSFCH waiting to be transmitted within the third RB set, the method includes determining the transmission resource for the third PSFCH from within the third RB set. The terminal device according to claim 176.

178. The aforementioned terminal device further, A method used to transmit the first PSFCH and the third PSFCH, characterized in that The terminal device according to claim 176 or 177.

179. A terminal device comprising memory and a processor, wherein the memory is used to store a program, and the processor is used to call the program in the memory to cause the terminal device to perform the method according to any one of claims 1 to 89.

180. An apparatus including a processor that calls a program from memory and causes the apparatus to perform the method according to any one of claims 1 to 89.

181. A chip comprising a processor that calls a program from memory and causes a device on which the chip is mounted to perform the method according to any one of claims 1 to 89.

182. A computer-readable storage medium storing a program that causes a computer to perform the method described in any one of claims 1 to 89.

183. A computer program product comprising a program that causes a computer to perform the method described in any one of claims 1 to 89.

184. A computer program that causes a computer to perform the method described in any one of claims 1 to 89.

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