Method for determining transmission power, and terminal device

Abstract

Provided are a method for determining a transmission power, and a terminal device. The method comprises: a terminal device determining a transmission power of a first PSFCH, wherein the first PSFCH is a PSFCH based on a comb-tooth structure.

Description

Method and terminal device for determining transmission power Technical Field

[0001] The present application relates to the field of communication technology, and more specifically, to a method and terminal device for determining transmission power. Background Art

[0002] The sidelink over unlicensed spectrum (SL-U) system supports a comb-tooth-structured physical sidelink feedback channel (PSFCH). However, how to perform power control on the comb-tooth-structured PSFCH is a problem that needs to be solved.

[0003] Summary of the Invention

[0004] The embodiments of the present application provide a method and a terminal device for determining transmit power. The following introduces various aspects of the present application.

[0005] In a first aspect, a method for determining transmission power is provided, including: a terminal device determines the transmission power of a first PSFCH, where the first PSFCH is a PSFCH based on a comb-tooth structure.

[0006] In a second aspect, a terminal device is provided, including: a determination module, used to determine the transmission power of a first PSFCH, where the first PSFCH is a PSFCH based on a comb-tooth structure.

[0007] In a third aspect, a terminal device is provided, comprising a transceiver, a memory and a processor, wherein the memory is used to store programs, and the processor is used to call the programs in the memory and control the transceiver to receive or send signals so that the terminal device executes the method described in the first aspect.

[0008] In a fourth aspect, a device is provided, comprising a processor configured to call a program from a memory so that the device executes the method described in the first aspect.

[0009] In a fifth aspect, a chip is provided, comprising a processor for calling a program from a memory so that a device equipped with the chip executes the method described in the first aspect.

[0010] In a sixth aspect, a computer-readable storage medium is provided, on which a program is stored, wherein the program enables a computer to execute the method as described in the first aspect.

[0011] In a seventh aspect, a computer program product is provided, comprising a program, wherein the program enables a computer to execute the method as described in the first aspect.

[0012] In an eighth aspect, a computer program is provided, which enables a computer to execute the method as described in the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] FIG1 is a diagram illustrating an example of a system architecture of a wireless communication system to which an embodiment of the present application may be applied.

[0014] FIG2 is an example diagram of a side communication scenario within network coverage.

[0015] FIG3 is an example diagram of a side communication scenario with partial network coverage.

[0016] FIG4 is an example diagram of a side communication scenario outside network coverage.

[0017] FIG5 is a diagram showing an example of a side communication scenario based on a central control node.

[0018] FIG6 is an example diagram of a sideline communication method based on broadcasting.

[0019] FIG7 is an example diagram of a unicast-based sideline communication method.

[0020] FIG8 is an example diagram of a side communication method based on multicast.

[0021] FIG. 9A is a diagram illustrating an example of a time slot structure used by a sideline communication system.

[0022] FIG. 9B is another diagram illustrating an example of a time slot structure used by the sideline communication system.

[0023] FIG10 is an example diagram of the listen before talk (LBT) process.

[0024] FIG11 is a diagram showing an example structure of a resource block (RB) set in the SL-U system.

[0025] FIG. 12A is a diagram illustrating an example of a comb-tooth structure.

[0026] FIG12B is a diagram showing an example of a PSFCH channel structure.

[0027] FIG12C is another example diagram of the channel structure of the PSFCH.

[0028] FIG13 is a flow chart of a method for determining transmit power provided in an embodiment of the present application.

[0029] FIG14 is a schematic diagram of the structure of the terminal device provided in an embodiment of the present application.

[0030] FIG15 is a schematic structural diagram of a device to which an embodiment of the present application can be applied. DETAILED DESCRIPTION

[0031] Communication system architecture

[0032] FIG1 is a diagram illustrating an exemplary system architecture of a wireless communication system 100 to which embodiments of the present application may be applied. The wireless communication system 100 may include a network device 110 and a terminal device 120. The network device 110 may be a device that communicates with the terminal device 120. The network device 110 may provide communication coverage for a specific geographic area and may communicate with the terminal device 120 within the coverage area.

[0033] FIG1 exemplarily shows a network device and a terminal device. Optionally, the wireless communication system 100 may include one or more network devices 110 and / or one or more terminal devices 120. For a network device 110, the one or more terminal devices 120 may all be located within the network coverage of the network device 110, or all be located outside the network coverage of the network device 110, or some may be located within the coverage of the network device 110 and others outside the network coverage of the network device 110. This is not limited in the embodiments of the present application.

[0034] Optionally, the wireless communication system 100 may further include other network entities such as a network controller and a mobility management entity, which is not limited in the embodiment of the present application.

[0035] It should be understood that the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: fifth generation (5G) system or new radio (NR), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), etc. The technical solutions provided in this application can also be applied to future communication systems, such as the sixth generation mobile communication system, satellite communication system, etc.

[0036] The terminal device in the embodiment of the present application may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), mobile terminal (MT), remote station, remote terminal device, mobile device, user terminal, wireless communication device, user agent or user device. The terminal device in the embodiment of the present application may be a device that provides voice and / or data connectivity to a user, and can be used to connect people, objects and machines, such as a handheld device with wireless connection function, a vehicle-mounted device, etc. The terminal device in the embodiment of the present application may be a mobile phone, a tablet computer (Pad), a laptop computer, a PDA, a mobile internet device (MID), a wearable device, a vehicle, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc. For example, a terminal device can act as a dispatching entity, providing sidelink signals between terminal devices in vehicle-to-everything (V2X) or device-to-device (D2D) communications. For example, a cell phone and a car can communicate with each other using sidelink signals. A cell phone and a smart home device can also communicate without relaying the communication signal through a base station. Alternatively, the terminal device can be used to act as a base station.

[0037] The network device in the embodiments of the present application may be a device for communicating with a terminal device, and may also be referred to as an access network device or a radio access network device. For example, the network device may be a base station. The network device in the embodiments of the present application may refer to a radio access network (RAN) node (or device) that connects a terminal device to a wireless network. A base station may broadly cover various names as follows, or be replaced with the following names, such as: NodeB, evolved NodeB (eNB), next generation NodeB (gNB), relay station, access point, transmitting and receiving point (TRP), transmitting point (TP), master station MeNB, secondary station SeNB, multi-standard radio (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. A base station may be a macro base station, a micro base station, a relay node, a donor node, or the like, or a combination thereof. A base station may also refer to a communication module, modem, or chip used to be set in the aforementioned device or apparatus. A base station may also be a mobile switching center and a device that performs base station functions in device-to-device D2D, V2X, or machine-to-machine (M2M) communications, a network-side device in a 6G network, or a device that performs base station functions in future communication systems. A base station may support networks with the same or different access technologies. The embodiments of this application do not limit the specific technology and specific device form used by network devices.

[0038] Base stations can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move based on the location of the mobile base station. In other examples, a helicopter or drone can be configured to act as a device that communicates with another base station.

[0039] In some deployments, the network device in the embodiments of the present application may refer to a CU or a DU, or the network device may include a CU and a DU. The gNB may also include an AAU.

[0040] The network equipment and terminal devices can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed in the air on aircraft, balloons, and satellites. The embodiments of this application do not limit the scenarios in which the network equipment and terminal devices are located.

[0041] Sideline communication under different network coverage conditions

[0042] Sidelink communication refers to a communication technology based on a sidelink. Sidelink communication can be, for example, device-to-device (D2D) or vehicle-to-everything (V2X) communication. In traditional cellular systems, communication data is received or sent between terminal devices and network devices, while sidelink communication supports direct communication and data transmission between terminal devices. Compared with traditional cellular communication, direct communication data transmission between terminal devices can have higher spectrum efficiency and lower transmission latency. For example, the vehicle networking system adopts sidelink communication technology.

[0043] In side communication, according to the network coverage of the terminal device, the side communication can be divided into side communication within the network coverage, side communication with partial network coverage, and side communication outside the network coverage.

[0044] Figure 2 illustrates an example scenario for sidelink communication within network coverage. In the scenario shown in Figure 2, both terminal devices 120a are within the coverage of network device 110. Therefore, both terminal devices 120a can receive configuration signaling from network device 110 (configuration signaling in this application can also be replaced by configuration information) and determine the sidelink configuration based on the configuration signaling from network device 110. After both terminal devices 120a have configured their sidelinks, sidelink communication can proceed on the sidelink.

[0045] Figure 3 is an example diagram of a sidelink communication scenario with partial network coverage. In the scenario shown in Figure 3, terminal device 120a performs sidelink communication with terminal device 120b. Terminal device 120a is located within the coverage range of network device 110, so terminal device 120a can receive the configuration signaling of network device 110 and determine the sidelink configuration based on the configuration signaling of network device 110. Terminal device 120b is located outside the network coverage and cannot receive the configuration signaling of network device 110. In this case, terminal device 120b can determine the sidelink configuration based on pre-configuration information and / or information carried in the physical sidelink broadcast channel (PSBCH) sent by terminal device 120a within the network coverage. After both terminal device 120a and terminal device 120b perform sidelink configuration, sidelink communication can be performed on the sidelink.

[0046] Figure 4 illustrates an example scenario for sidelink communication outside of network coverage. In the scenario shown in Figure 4, both terminal devices 120b are outside of network coverage. In this scenario, both terminal devices 120b can determine the sidelink configuration based on pre-configured information. After both terminal devices 120b have configured their sidelinks, sidelink communication can proceed over the sidelink.

[0047] Sideline communication based on central control node

[0048] Figure 5 is an example diagram of a sideline communication scenario based on a central control node. In this sideline communication scenario, multiple terminal devices can form a communication group, and the communication group has a central control node. The central control node can be a terminal device in the communication group (such as terminal device 1 in Figure 5), and the terminal device can also be called a cluster head (CH) terminal device. The central control node can be responsible for completing one or more of the following functions: establishing a communication group, joining and leaving group members of the communication group, coordinating resources within the communication group, allocating sideline transmission resources to other terminal devices, receiving sideline feedback information from other terminal devices, and coordinating resources with other communication groups.

[0049] Sideline communication mode

[0050] Some standards or protocols (such as the 3rd Generation Partnership Project (3GPP)) define two sideline communication modes: a first mode and a second mode.

[0051] In the first mode, the resources of the terminal device (the resources mentioned in this application may also be referred to as transmission resources, such as time-frequency resources) are allocated by the network device. The terminal device can send data on the side link according to the resources allocated by the network device. The network device can allocate resources for a single transmission to the terminal device, or it can allocate resources for semi-static transmission to the terminal device. This first mode can be applied to scenarios covered by a network device, such as the scenario shown in Figure 2 above. In the scenario shown in Figure 2, the terminal device 120a is within the network coverage of the network device 110, so the network device 110 can allocate resources used in the side transmission process to the terminal device 120a.

[0052] In the second mode, the terminal device can autonomously select one or more resources from a resource pool (RP). The terminal device can then perform side transmission based on the selected resources. For example, in the scenario shown in FIG4 , the terminal device 120b is located outside the cell coverage area. Therefore, the terminal device 120b can autonomously select resources from a pre-configured resource pool for side transmission. Alternatively, in the scenario shown in FIG2 , the terminal device 120a can also autonomously select one or more resources from a resource pool configured by the network device 110 for side transmission.

[0053] Data transmission method of side communication

[0054] Some sidewalk communication systems (such as long-term evolution vehicle to everything (LTE-V2X)) support broadcast-based data transmission (hereinafter referred to as broadcast transmission). For broadcast transmission, the receiving terminal can be any terminal device around the transmitting terminal. Taking Figure 6 as an example, terminal device 1 is the transmitting terminal, and the receiving terminal corresponding to the transmitting terminal is any terminal device around terminal device 1, for example, terminal device 2 to terminal device 6 in Figure 6.

[0055] In addition to broadcast transmission, some communication systems also support unicast-based data transmission (hereinafter referred to as unicast transmission) and / or multicast-based data transmission (hereinafter referred to as multicast transmission). For example, the new radio vehicle to everything (NR-V2X) hopes to support autonomous driving. Autonomous driving places higher requirements on data interaction between vehicles. For example, data interaction between vehicles requires higher throughput, lower latency, higher reliability, larger coverage, more flexible resource allocation, etc. Therefore, in order to improve the performance of data interaction between vehicles, NR-V2X introduces unicast transmission and multicast transmission.

[0056] For unicast transmission, there is typically only one receiving terminal. For example, in Figure 7, unicast transmission occurs between terminal devices 1 and 2. Terminal device 1 can be the sending terminal, and terminal device 2 can be the receiving terminal, or vice versa.

[0057] For multicast transmission, the receiving terminal can be a terminal device within a communication group, or a terminal device within a certain transmission distance. For example, in Figure 8, terminal devices 1, 2, 3, and 4 form a communication group. If terminal device 1 sends data, all other terminal devices in the group (terminal devices 2 through 4) can be receiving terminals.

[0058] Time slot structure for sideline communication

[0059] A communication system may define a frame, subframe, or time slot structure for sideline communication. Some sideline communication systems define multiple time slot structures. For example, NR-V2X defines two time slot structures. One of these two time slot structures does not include the PSFCH (see Figure 9A ); the other of these two time slot structures includes the PSFCH (see Figure 9B ).

[0060] The physical sidelink control channel (PSCCH) in NR-V2X can start at the second sidelink symbol of the time slot in the time domain, and the PSCCH can occupy 2 or 3 symbols in the time domain (the symbols mentioned here can all refer to orthogonal frequency division multiplexing (OFDM) symbols). The PSCCH can occupy multiple PRBs in the frequency domain. For example, the number of PRBs occupied by the PSCCH can be selected from the following values: {10, 1215, 20, 25}.

[0061] To reduce the complexity of blind detection of PSCCH by terminal devices, typically, only one number of symbols and PRBs is configured for PSCCH within a resource pool. Furthermore, since NR-V2X uses sub-channels as the minimum granularity for physical sidelink shared channel (PSSCH) resource allocation, the number of PRBs occupied by PSCCH must be less than or equal to the number of PRBs contained in a sub-channel within the resource pool.

[0062] Referring to Figure 9A, for a time slot structure that does not include PSFCH, the PSSCH in NR-V2X can use the second side symbol of the time slot as the starting position in the time domain. The last side symbol in the time slot is used as a guard period (GP), and the remaining symbols can be mapped to PSSCH. The first side symbol in the time slot can be a repetition of the second side symbol. Generally speaking, the terminal device at the receiving end will use the first side symbol as a symbol for automatic gain control (AGC). Therefore, the data on the first side symbol is usually not used for data demodulation. PSSCH can occupy K subchannels in the frequency domain, and each subchannel can include M consecutive PRBs (the values ​​of K and M can be predefined by the protocol, or preconfigured, or configured by the network device, or depend on the terminal device implementation).

[0063] FIG9B illustrates a time slot structure including the PSFCH, schematically illustrating the positions of the symbols occupied by the PSFCH, PSCCH, and PSSCH in a time slot. The primary difference between this time slot structure and FIG9A is that the penultimate and third-to-last symbols in a time slot are used for PSFCH transmission. Furthermore, the symbol preceding the symbol used for PSFCH transmission also serves as the GP. As can be seen from the time slot structure shown in FIG9B , in a time slot, the last symbol serves as the GP, the second-to-last symbol is used for PSFCH transmission, and the data on the third-to-last symbol is the same as the data on the second-to-last symbol used for PSFCH transmission. That is, the third-to-last symbol serves as the symbol for AGC, while the fourth-to-last symbol has the same function as the last symbol and also serves as the GP. Furthermore, the first symbol in a time slot is used for AGC, and the data on this symbol is the same as the data on the second symbol in the time slot. PSCCH occupies three symbols, and the remaining symbols can be used for PSSCH transmission.

[0064] Sidelink power control

[0065] The NR SL system supports open-loop control of the transmit power of PSSCH, PSCCH, PSFCH, and sidelink synchronization signal block (S-SSB). For the transmission of PSSCH and PSCCH in unicast scenarios, three power control methods can be supported: power control based only on downlink path loss, power control based only on sidelink path loss, and power control based on downlink path loss and sidelink path loss. Which power control method PSSCH and PSCCH actually need to adopt can be determined by the high-level (RRC layer) configuration. For example, if the high-level layer only configures the basic working point P for power control based on sidelink path loss, 0,SL, it means that power control is performed based only on the sidelink path loss; if the upper layer only configures the basic working point P for power control based on the downlink path loss 0,D , it means that power control is performed based only on the downlink path loss; if the higher layer configures P 0,SL and P 0,D , it means that power control is performed based on the downlink path loss and the sidelink path loss.

[0066] For the transmission of PSFCH and S-SSB, as well as the transmission of PSSCH and PSCCH in multicast and broadcast scenarios, since the terminal device as the transmitter does not obtain the sidelink path loss information, only power control based on the downlink path loss is supported.

[0067] The NR SL system supports the terminal device to send multiple PSFCHs in one time domain symbol, and the maximum transmit power of the terminal device can be evenly divided among multiple PSFCHs. In addition, in the NR SL system, the maximum number of PSFCHs allowed to be sent simultaneously by the terminal device does not exceed the maximum number of PSFCHs configured by the high-level layer N. max,PSFCH The terminal device can determine the number N of PSFCHs to be sent in a PSFCH time slot or PSFCH transmission opportunity. sch,Tx,PSFCH Furthermore, the terminal device can max,PSFCH and N sch,Tx,PSFCH Determine the number N of PSFCHs that need to be sent simultaneously Tx,PSFCH , and determine the transmit power of each PSFCH.

[0068] The terminal device determines the transmit power of each PSFCH and the number of PSFCHs N actually transmitted by the terminal device. Tx,PSFCH The general principle is that the transmission power of each PSFCH is the same and does not exceed P PSFCH,one , N Tx,PSFCH The total transmit power of the PSFCHs shall not exceed the configured maximum transmit power P CMAX If N Tx,PSFCH The total transmit power of PSFCHs exceeds P CMAX , the terminal device re-determines the number of PSFCHs to be sent according to the PSFCH priority. However, the number of PSFCHs to be sent determined by the terminal device shall not be lower than a lower limit value so that the transmission power of each PSFCH is less than or equal to P PSFCH,one .

[0069] P PSFCH,one It can be determined using the following formula: PSFCH,one =P O_PSFCH +10log 10 (2 μ )+α PSFCH ·PLD [dBm].

[0070] In the above formula, P O_PSFCH Indicates the basic operating point of the PSFCH transmit power for power control based on downlink path loss configured by the higher layer. PSFCH Indicates the downlink path loss compensation factor configured by the higher layer signaling. If the higher layer does not configure α PSFCH , then α PSFCH The value of can be 1. PL D Represents the downlink path loss estimated by the terminal. Parameter μ is determined based on the sidecar subcarrier spacing. The relationship between parameter μ and subcarrier spacing is shown in Table 1 below.

[0071] Table 1

[0072] Unlicensed spectrum and channel monitoring

[0073] Unlicensed spectrum is a spectrum designated by countries and regions for use by radio equipment. This spectrum is generally considered shared. This means that communications equipment within the same or different systems can use this spectrum as long as they meet national or regional regulatory requirements for that spectrum, without having to apply for exclusive spectrum authorization from the government.

[0074] To ensure the harmonious coexistence of various communication devices (or communication systems) using unlicensed spectrum for wireless communications, some countries or regions have established regulatory requirements for the use of unlicensed spectrum. For example, communication devices adhere to the listen before talk (LBT) principle. LBT refers to the fact that before a communication device transmits signals on an unlicensed spectrum channel, it must first perform a channel sensing or channel access process. If the channel sensing result indicates that the channel is idle, the communication device may use the unlicensed spectrum channel for signal transmission; if the channel sensing result indicates that the channel is busy, the communication device is generally not allowed to use the unlicensed spectrum channel for signal transmission. To ensure fairness, the duration of a communication device's signal transmission using an unlicensed spectrum channel cannot exceed the maximum channel occupancy time (MCOT) during a single transmission. Figure 10 shows an example of the channel occupancy time obtained by a communication device after successful LBT on an unlicensed spectrum channel, and the use of resources within the channel occupancy time for signal transmission.

[0075] Although channel monitoring based on LBT is not a global regulatory requirement, channel monitoring can bring the benefits of interference avoidance and friendly coexistence to communication transmissions between communication systems on shared spectrum. Therefore, in the design process of NR systems on unlicensed spectrum, channel monitoring is a feature that must be supported by communication equipment in the system. From the perspective of system networking, channel monitoring includes two mechanisms. One is LBT based on load-based equipment (LBE), also known as dynamic channel monitoring or dynamic channel occupancy; the other is LBT based on frame-based equipment (FBE), also known as semi-static channel monitoring or semi-static channel occupancy.

[0076] The following focuses on several different types of LBT methods (i.e., several different types of channel access methods).

[0077] Type 1 LBT method (Type 1 LBT method) can also be called multi-slot channel detection based on random backoff of contention window size adjustment. In Type 1 LBT method, the communication device can initiate a channel access priority p with a length of T mcot The following table shows the channel access priority and corresponding parameters when the terminal device performs type 1 LBT.

[0078] Table 2: Channel access parameters corresponding to different channel priorities

[0079] In the above Table 2, m p Refers to the number of fallback slots corresponding to the channel access priority p, CW p Refers to the contention window size corresponding to the channel access priority p, CW min,p Refers to the CW corresponding to the channel access priority p p Minimum value, CW max,p Refers to the CW corresponding to the channel access priority p p The maximum value, T mcot,p Refers to the maximum channel occupancy time length corresponding to the channel access priority p. Among the four channel access priorities shown in Table 2, p=1 is the highest priority.

[0080] If a network device uses the Type 1 LBT method, the network device can not only send its own data during the channel occupancy period, but also share the channel occupancy time (COT) with the terminal device. Correspondingly, if a terminal device uses the Type 1 LBT method, the terminal device can not only send its own data during the channel occupancy period, but also share the COT with the network device or other terminal devices. Resource sharing within the COT can use the Type 2 LBT method (Type 2 LBT method) for channel access. The Type 2 LBT method (Type 2 LBT method) can also be called a channel access method based on a fixed-length channel listening time slot. The Type 2 LBT method includes the Type 2A LBT method (Type 2A LBT method), the Type 2B LBT method (Type 2B LBT method), and the Type 2C LBT method (Type 2C LBT method).

[0081] In Type 2A LBT, a communication device can use a 25-microsecond (µs) channel detection cycle. This means the device can begin channel detection 25 µs before starting to send data. This 25-µs channel detection cycle can include one 16-µs channel detection cycle and one 9-µs channel detection cycle. If both detections indicate the channel is idle, the channel is considered idle and can be accessed.

[0082] In Type 2B LBT, a communication device can use 16us channel detection. During the channel detection process, if the communication device detects that the channel is idle for at least 5us within the 16us and that the channel is idle for more than 4us within the last 9us, the channel is considered idle.

[0083] In Type 2C LBT, communication devices can transmit data directly over the channel without performing channel detection. In Type 2C LBT, the time difference between the current transmission and the previous transmission must be less than or equal to 16µs. In other words, if the time difference between two transmissions is less than or equal to 16µs, they are considered the same transmission and channel detection is not required. It should be noted that in Type 2C LBT, the transmission duration of communication devices is limited and generally cannot exceed 584µs.

[0084] RB Set in SL-U System

[0085] In the SL-U system, a resource pool can be configured on the unlicensed spectrum (or shared spectrum) through pre-configuration information or configuration information of the network device. The resource pool can be used for sideline transmission. In some embodiments, the resource pool includes M1 RB sets, where one RB set can include M2 ​​RBs, and M1 and M2 are positive integers. In some embodiments, one RB set corresponds to one channel in the unlicensed spectrum (or shared spectrum). Alternatively, one RB set corresponds to the minimum frequency domain granularity for LBT. Alternatively, one RB set corresponds to one LBT subband.

[0086] For example, if the bandwidth corresponding to a channel on the unlicensed spectrum is 20 MHz, then the bandwidth corresponding to an RB set is also 20 MHz. Alternatively, if the bandwidth of a channel on the unlicensed spectrum is 20 MHz, then this 20 MHz corresponds to M3 RBs. These M3 RBs are all the RBs included in a channel, or all the RBs in a channel that can be used for data transmission. For example, if M3 = 100 (corresponding to a 15 kHz subcarrier spacing), then an RB set also corresponds to 100 RBs, that is, M2 = 100.

[0087] For example, the results of the LBT process or channel access process are needed to determine whether the unlicensed spectrum can be used. If the minimum frequency domain granularity for LBT is 20 MHz, then one RB set corresponds to the number of RBs included in 20 MHz. Alternatively, if one RB set includes M2 = 100 RBs (corresponding to a 15 kHz subcarrier spacing), the minimum frequency domain granularity for LBT is one RB set, i.e., 100 RBs.

[0088] It should be noted that in the embodiment of the present application, the RB set can also be called a channel or LBT subband, and the embodiment of the present application does not limit this.

[0089] In some implementations, a guard band may be configured between two adjacent RB sets. The guard band may also be called an intra-cell guard band. RBs included in an RB set do not include RBs in the guard band.

[0090] In some implementations, the M1 RB sets included in the resource pool are continuous M1 RB sets.

[0091] In some implementations, the frequency domain starting position of the resource pool is the same as the frequency domain starting position of the first RB set in the M1 RB sets. The first RB set mentioned here is the RB set with the lowest frequency domain position in the M1 resource block sets.

[0092] In some implementations, the frequency domain end position of the resource pool is the same as the frequency domain end position of the second RB set in the M1 RB sets. The second RB set mentioned here is the RB set with the highest frequency domain position in the M1 RB sets.

[0093] For example, a resource pool includes M1=3 RB sets. The three RB sets are RB set 0, RB set 1, and RB set 2. RB set 0 has the lowest frequency domain position, and RB set 2 has the highest frequency domain position. In this case, the frequency domain starting position of the resource pool can be the same as the frequency domain starting position of RB set 0, or the frequency domain starting position of the resource pool can be determined based on the frequency domain starting position of RB set 0; the frequency domain ending position of the resource pool can be the same as the frequency domain ending position of RB set 2, or the frequency domain ending position of the resource pool can be determined based on the frequency domain ending position of RB set 2.

[0094] In some implementations, a guard band (GB) is included between two adjacent RB sets in the M1 RB sets included in the resource pool. The guard band may also be called an intra-cell guard band.

[0095] In some implementations, the frequency domain starting position and frequency domain size of the guard band can be determined based on pre-configured information or network device configuration information. For example, a terminal device can obtain pre-configured information or network device configuration information, and the pre-configured information or network device configuration information can be used to configure the guard band. In some implementations, the guard band is used to separate RB sets.

[0096] For example, as shown in Figure 11, three guard bands are configured within the sidelink bandwidth part (BWP), corresponding to guard band 0, guard band 1, and guard band 2. As shown in Figure 11, these three guard bands separate four RB sets. The frequency domain starting position and ending position of each RB set can be determined based on the frequency domain starting position of the sidelink BWP (i.e., the starting point of the sidelink BWP shown in Figure 11), the frequency domain starting position of each guard band (i.e., the starting point of the guard band shown in Figure 11), and the frequency domain size of the guard band (i.e., the length of the guard band shown in Figure 11). A sidelink resource pool is configured within the sidelink BWP. This sidelink resource pool includes three RB sets, RB set 0 through RB set 2. Therefore, the frequency domain starting position of this resource pool (i.e., the starting point of the resource pool shown in Figure 11) corresponds to the frequency domain starting position of RB set 0, and the frequency domain ending position of the resource pool (i.e., the ending point of the resource pool shown in Figure 11) corresponds to the frequency domain ending position of RB set 2.

[0097] Comb structure in SL-U system

[0098] Communicating on unlicensed frequency bands usually needs to meet the corresponding regulatory requirements. For example, if a terminal device wants to communicate using an unlicensed frequency band, the frequency band range occupied by the terminal device needs to be greater than or equal to 80% of the system bandwidth. Therefore, in order to allow as many terminal devices as possible to access the channel in the same time, a comb-tooth (interlace)-based resource configuration method is defined in SL-U. Assuming that a comb tooth includes N discrete PRBs in the frequency domain, and the frequency band includes a total of M comb teeth, the PRBs included in the mth comb tooth are {m, M+m, 2M+m, 3M+m, ...}. As shown in Figure 12A, an RB set includes 50 PRBs, and the subcarrier spacing is 30kHz. The RB set includes 5 comb teeth (i.e., M=5), and the corresponding comb tooth indexes are comb tooth 0, comb tooth 1, comb tooth 2, comb tooth 3, and comb tooth 4, respectively. In this case, each comb tooth in the RB set can include 10 PRBs (i.e., N=10), and the frequency domain intervals of two adjacent PRBs in a comb tooth are the same, i.e., 5 PRBs apart. It should be noted that the PRBs included in a comb tooth can also be called an interlaced resource block (IRB). The number of comb teeth contained in an RB set can be related to the subcarrier spacing. For example, for 15kHz and 30kHz subcarrier spacing, an RB set can include 10 comb teeth and 5 comb teeth, respectively.

[0099] In some implementations, different comb teeth within an RB set may include the same or different numbers of PRBs. For example, an RB set includes 5 comb teeth, with corresponding comb tooth indices being comb teeth 0 to 4, where comb teeth 0, 1, and 2 each include 10 PRBs, and comb teeth 3 and 4 each include 11 PRBs.

[0100] Comb-based PSFCH structure in SL-U system

[0101] In order to meet the requirements of the regulations on occupied channel bandwidth (OCB), a PSFCH channel structure based on a comb structure is introduced in the SL-U system. Two types of comb-based PSFCH channel structures are supported in the SL-U system. In the first structure, a PSFCH occupies one common comb tooth and K3 dedicated PRBs in an RB set. The K3 dedicated PRBs are part of the PRBs in the same comb tooth, and the value of K3 includes, for example, {1, 2, 5}. In an RB set, the common comb teeth corresponding to different PSFCHs can be the same, and the K3 dedicated PRBs corresponding to different PSFCHs are usually different. As shown in Figure 12B, the RB set includes 5 comb teeth, corresponding to comb teeth 0 to comb teeth 4, where comb tooth 0 is the common comb tooth, and K3 = 2, that is, the transmission resources of a PSFCH include the PRBs in the common comb teeth and 2 dedicated PRBs. The transmission resources of PSFCH1 in Figure 12B include the common comb tooth (i.e., comb tooth 0) and the first two PRBs in comb tooth 1, the transmission resources of PSFCH2 include the common comb tooth (i.e., comb tooth 0) and the first two PRBs in comb tooth 2, the transmission resources of PSFCH3 include the common comb tooth (i.e., comb tooth 0) and the third PRB and the fourth PRB in comb tooth 2, and the transmission resources of PSFCH4 include the common comb tooth (i.e., comb tooth 0) and the seventh PRB and the eighth PRB in comb tooth 3. In this embodiment of the present application, the K3 PRBs included in the PSFCH transmission resources may be continuous or discontinuous, and this application does not limit this.

[0102] In the second structure, a PSFCH occupies one comb tooth in an RB set, and different PSFCHs occupy different comb teeth in an RB set. As shown in Figure 12C, the RB set includes five comb teeth, corresponding to comb teeth 0 to 4. The transmission resources of each PSFCH correspond to a comb tooth. The transmission resources of PSFCH0, PSFCH1, PSFCH2, PSFCH3, and PSFCH4 are comb teeth 0, 1, 2, 3, and 4, respectively.

[0103] The previous article introduced the power control method for PSFCH in the NR SL system. In the NR SL system, the PSFCH occupies one PRB in the frequency domain. Therefore, the power control method for PSFCH in the NR SL system is designed for this type of PSFCH channel structure (i.e., a channel structure in which one PSFCH occupies one PRB). The SL-U system supports PSFCH with a comb-tooth structure. For a PSFCH with a comb-tooth structure, the number of PRBs occupied by a PSFCH is greater than one. Therefore, for a PSFCH with a comb-tooth structure, how to determine the transmit power of the PSFCH is a problem that needs to be solved.

[0104] In response to the above problems, the embodiments of the present application are described in detail below.

[0105] FIG13 is a flow chart of a method for determining transmit power according to an embodiment of the present application. The method of FIG13 may be executed by a terminal device, such as the terminal device 120 in FIG1 .

[0106] 13 , in step S1310 , the terminal device determines the transmit power of a first PSFCH. The first PSFCH is a PSFCH based on a comb-tooth structure.

[0107] In some implementations, the frequency domain resources or channel structure of the first PSFCH may include PRBs corresponding to common comb teeth and dedicated PRBs in an RB set. For ease of description, this channel structure is referred to as the "first structure" below.

[0108] In some implementations, the first PSFCH may include the PRB corresponding to the first comb tooth in the first RB set. The frequency domain resources of the first PSFCH may include only the PRB corresponding to the first comb tooth in the first RB set. Alternatively, the frequency domain resources of the first PSFCH do not include PRBs other than the PRBs corresponding to the first comb tooth in the first RB set. The first comb tooth mentioned here may be a dedicated comb tooth in an RB set. That is, the frequency domain resources of the first PSFCH may include one dedicated comb tooth in an RB set, and the frequency domain resources of the first PSFCH include all PRBs corresponding to the dedicated comb tooth in the one RB set. For ease of description, this channel structure is referred to as the "second structure" below.

[0109] It should be noted that in an embodiment of the present application, if a guard band is configured between two adjacent RB sets, the transmission resources of PSFCH do not include the PRB in the guard band, or the PRB in the guard band is not used to transmit PSFCH.

[0110] The first PSFCH may be any PSFCH in a PSFCH transmission occasion, or may be any PSFCH among one or more PSFCHs transmitted in a time domain symbol.

[0111] The first PSFCH may carry sidelink feedback information or conflict information. The sidelink feedback information may be, for example, hybrid automatic repeat reQuest (HARQ)-acknowledgement (ACK) information.

[0112] The following describes in detail the method for determining the transmit power of the first PSFCH by combining Examples 1 and 2. In Example 1, the channel structure of the first PSFCH is the first structure mentioned above. In Example 2, the channel structure of the first PSFCH is the second structure mentioned above.

[0113] Example 1: The channel structure of the first PSFCH is the first structure

[0114] The following first describes the method for determining the transmit power of the first PSFCH in conjunction with Example 1.1, and then describes the method for determining the transmit power on one PRB in the first PSFCH in conjunction with Example 1.2. It should be understood that Example 1.1 and Example 1.2 can be independent of each other or can be combined with each other. For example, the transmit power of the first PSFCH can be determined according to the implementation method described in Example 1.1, and the transmit power on one PRB in the first PSFCH can be determined according to the implementation method described in Example 1.2. For another example, the transmit power on one PRB in the first PSFCH can be determined according to the implementation method described in Example 1.2, but the method for determining the transmit power of the first PSFCH is not limited. For another example, the transmit power of the first PSFCH can be determined according to the implementation method described in Example 1.1, without limiting the transmit power on one PRB in the first PSFCH.

[0115] Example 1.1: Determination of the transmit power of the first PSFCH

[0116] In some implementations, the transmit power of the first PSFCH may be determined based on the number of dedicated PRBs included in a PSFCH. Determining the transmit power of the first PSFCH based on the number of dedicated PRBs included in a PSFCH can match the determination method of the transmit power of the first PSFCH with the channel structure of the first PSFCH, thereby making the determined transmit power of the first PSFCH more accurate.

[0117] In some implementations, the transmit power of the first PSFCH may be determined based on the number of PRBs in a common comb tooth included in a PSFCH. Determining the transmit power of the first PSFCH based on the number of PRBs in a common comb tooth included in a PSFCH can match the determination method of the transmit power of the first PSFCH with the channel structure of the first PSFCH, thereby making the determined transmit power of the first PSFCH more accurate.

[0118] In some implementations, the transmit power of the first PSFCH may be determined based on the number of PRBs in a common comb contained in a PSFCH and the number of dedicated PRBs contained in a PSFCH. Determining the transmit power of the first PSFCH based on the number of PRBs in a common comb contained in a PSFCH and the number of dedicated PRBs contained in a PSFCH can match the method for determining the transmit power of the first PSFCH with the channel structure of the first PSFCH, thereby making the determined transmit power of the first PSFCH more accurate.

[0119] In some implementations, the transmit power of the first PSFCH is determined based on the number of dedicated PRBs contained in a PSFCH, which may include: the transmit power of the first PSFCH is determined based on the transmit power of a single PSFCH (P PSFCH,one ) is determined, and the transmit power of a single PSFCH is determined based on the number of dedicated PRBs contained in a PSFCH.

[0120] In some implementations, the transmit power of a single PSFCH may be determined based on one or more of the following:

[0121] The number of dedicated PRBs contained in a PSFCH is K3;

[0122] Parameters for power control based on downlink path loss;

[0123] Downlink path loss (PL);

[0124] The parameter μ is determined based on the subcarrier spacing.

[0125] In some implementations, the number K3 of dedicated PRBs included in a PSFCH may be determined based on protocol predefined information, pre-configured information, configuration information of a network device, or indication information of a terminal device.

[0126] In some implementations, the parameter for power control based on downlink path loss may include a P0 value for power control based on downlink path loss. O,PSFCH Indicates. O,PSFCH It can be determined based on the parameter dl-P0-PSFCH configured by the higher layer.

[0127] In some implementations, the parameter for power control based on downlink path loss may include an α value for power control based on downlink path loss. PSFCH Indicates. PSFCH It can also be called the downlink path loss compensation factor. PSFCH It can be determined by the parameter dl-Alpha-PSFCH configured by the higher layer. If the higher layer does not configure this parameter, then α PSFCHThe value of can be 1.

[0128] In some implementations, the downlink path loss PL may be determined based on measurements of the terminal device.

[0129] In some implementations, the value of the parameter μ determined based on the subcarrier spacing may be determined based on the subcarrier spacing. The correspondence between μ and the subcarrier spacing can be seen in Table 1 above.

[0130] Exemplarily, the transmit power of a single PSFCH may be determined based on (or satisfy) the following formula: PSFCH,one =P O,PSFCH +10log 10 (2 μ ·K3)+α PSFCH ·PL.

[0131] Example 1.2: Determination of the transmit power of the first PRB

[0132] Example 1.1 describes in detail the method for determining the transmit power of the first PSFCH. Since the first PSFCH may include PRBs of the common comb teeth and K3 dedicated PRBs, and Example 1.1 only determines the transmit power of the first PSFCH based on the K3 dedicated PRBs, it is also necessary to determine the transmit power of each PRB included in the transmission resources of the first PSFCH. Example 1.2 describes in detail the method for determining the transmit power of the first PRB (which can be any PRB in the transmission resources of the first PSFCH). It should be understood that the first PRB mentioned here can be a PRB in the common comb teeth occupied by the first PSFCH, or it can be a dedicated PRB occupied by the first PSFCH.

[0133] In some implementations, the transmit power of the first PRB may be determined based on one or more of the following:

[0134] The transmission power of a single PSFCH (P PSFCH,one );

[0135] N selected by the terminal device Tx,PSFCH The number of PSFCHs;

[0136] The transmit power of a PSFCH;

[0137] The number of dedicated PRBs contained in a PSFCH;

[0138] N Tx,PSFCH The number of PRBs in the common comb corresponding to the PSFCH (total number);

[0139] The correlation between the transmit power on a PRB in a common comb and the transmit power on a dedicated PRB;

[0140] The minimum transmit power on a PRB.

[0141] Parameters or factors that may be considered when determining the transmit power of the first PRB are described in detail below.

[0142] Factor 1: Single PSFCH transmit power

[0143] In some implementations, the transmit power of a single PSFCH may be determined based on one or more of the following:

[0144] The number of dedicated PRBs contained in a PSFCH is K3;

[0145] Parameters for power control based on downlink path loss;

[0146] Downlink path loss PL;

[0147] The parameter μ is determined based on the subcarrier spacing.

[0148] In some implementations, the number K3 of dedicated PRBs included in a PSFCH may be determined based on protocol predefined information, pre-configured information, configuration information of a network device, or indication information of a terminal device.

[0149] In some implementations, the parameter for power control based on downlink path loss may include a P0 value for power control based on downlink path loss. O,PSFCH Indicates. O,PSFCH It can be determined based on the parameter dl-P0-PSFCH configured by the higher layer.

[0150] In some implementations, the parameter for power control based on downlink path loss may include an α value for power control based on downlink path loss. PSFCH Indicates. PSFCH It can also be called the downlink path loss compensation factor. PSFCH It can be determined by the parameter dl-Alpha-PSFCH configured by the higher layer. If the higher layer does not configure this parameter, then α PSFCH The value of can be 1.

[0151] In some implementations, the downlink path loss PL may be determined based on measurements of the terminal device.

[0152] In some implementations, the value of the parameter μ determined based on the subcarrier spacing may be determined based on the subcarrier spacing. The correspondence between μ and the subcarrier spacing can be seen in Table 1 above.

[0153] Exemplarily, the transmit power of a single PSFCH may be determined based on (or satisfy) the following formula:PSFCH,one =P O,PSFCH +10log 10 (2 μ ·K3)+α PSFCH PL. The meanings of the parameters are the same as those in Example 1.1 and will not be repeated here.

[0154] Factor 2: N selected by the terminal device Tx,PSFCH The number of PSFCHs

[0155] In the time domain symbol corresponding to the PSFCH transmission opportunity or PSFCH transmission resource, there are multiple PSFCHs to be sent, and the terminal needs to select N from them. Tx,PSFCH PSFCH is sent. In this embodiment of the application, the terminal device selects N Tx,PSFCH The method of selecting PSFCH is not specifically limited. For example, in some implementations, the terminal device may select N based on one or more of the following: Tx,PSFCH PSFCH:

[0156] Transmit power of a single PSFCH;

[0157] a first maximum transmit power;

[0158] The number of PSFCHs to be sent by the terminal device is recorded as N sch,Tx,PSFCH ;

[0159] The priority corresponding to PSFCH;

[0160] The number of dedicated PRBs contained in a PSFCH transmission resource.

[0161] The first maximum transmit power may be determined based on a configured maximum output power. The configured maximum output power may be determined based on pre-configured information and / or configuration information of the network device. For example, the configured maximum output power may be determined based on a high-level parameter sl-maxTxPower. For example, the first maximum transmit power may be determined using P CMAX Indicates that the unit is dBm.

[0162] The following gives the terminal device selection N Tx,PSFCH A more specific example of a PSFCH.

[0163] For example, the terminal device may determine the transmit power of a PSFCH based on the number of dedicated PRBs included in a PSFCH, and select N Tx,PSFCH For PSFCH transmission k in PSFCH transmission opportunity i, 1≤k≤N Tx,PSFCH , PSFCH can be selected based on the following method.

[0164] First, if the terminal device is configured with the parameter dl-P0-PSFCH, the transmit power of a single PSFCH is determined based on the following formula:

[0165] P PSFCH,one =P O,PSFCH +10log 10 (2 μ ·K3)+α PSFCH PL [dBm] K3 represents the number of dedicated PRBs included in a PSFCH transmission resource, and the meanings of the other parameters are the same as those in embodiment 1.1 and are not described here in detail.

[0166] In determining P PSFCH,one After that, we can make judgments based on different situations, and determine the N Tx,PSFCH May be different.

[0167] Case 1: If N sch,Tx,PSFCH ≤N max,PSFCH

[0168] ③Case 1-1: If P is satisfied PSFCH,one +10log 10 (N sch,Tx,PSFCH )≤P CMAX

[0169] In case 1-1, N Tx,PSFCH =N sch,Tx,PSFCH ;P PSFCH,k (i) = P PSFCH,one [dBm].

[0170] ③ Case 1-2: If P is satisfied PSFCH,one +10log 10 (N sch,Tx,PSFCH )>P CMAX

[0171] Among them, P CMAX Indicates the first maximum transmit power or is determined based on the first maximum transmit power.

[0172] In case 1-2, the terminal device autonomously determines N in the order of increasing priority value. Tx,PSFCH PSFCHs (i.e., the priority value of the selected PSFCH is less than or equal to the priority value of the unselected PSFCH). In the process of selecting PSFCH, the terminal device first selects the PSFCH carrying HARQ-ACK information, and then selects the PSFCH carrying conflict information. Tx,PSFCH PSFCHs satisfy: For PSFCH carrying HARQ-ACK information, Mi (1≤i≤8) represents the number of PSFCHs corresponding to the priority value i; for PSFCHs carrying conflicting information, M i (i>8) indicates the number of PSFCHs corresponding to the priority value (i-8); K is the maximum value that satisfies the following formula: Otherwise K=0.

[0173] In case 1-2, P PSFCH,k (i) = min(P CMAX -10log 10 (N Tx,PSFCH ),P PSFCH,one )[dBm].

[0174] Case 2: If N sch,Tx,PSFCH >N max,PSFCH

[0175] In case 2, the terminal device autonomously determines N in the order of increasing priority values. max,PSFCH PSFCH.

[0176] ③Case 2-1: If P is satisfied PSFCH,one +10log 10 (N max,PSFCH )≤P CMAX

[0177] In case 2-1, N Tx,PSFCH =N max,PSFCH ;P PSFCH,k (i) = P PSFCH,one [dBm].

[0178] ③Case 2-2: If P is satisfied PSFCH,one +10log 10 (N max,PSFCH )>P CMAX

[0179] Among them, P CMAX Indicates the first maximum transmit power or is determined based on the first maximum transmit power.

[0180] In case 2-2, the terminal device autonomously determines N in the order of increasing priority values. Tx,PSFCH PSFCHs (i.e., the priority value of the selected PSFCH is less than or equal to the priority value of the unselected PSFCH). In the process of selecting PSFCH, the terminal device first selects the PSFCH carrying HARQ-ACK information, and then selects the PSFCH carrying conflict information. Tx,PSFCH PSFCHs satisfy: For PSFCH carrying HARQ-ACK information, Mi (1≤i≤8) represents the number of PSFCHs corresponding to the priority value i; for PSFCHs carrying conflicting information, M i (i>8) indicates the number of PSFCHs corresponding to the priority value (i-8); K is the maximum value that satisfies the following formula: Otherwise K=0.

[0181] In case 2-2, P PSFCH,k (i) = min(P CMAX -10log 10 (N Tx,PSFCH ),P PSFCH,one )[dBm].

[0182] The above description is the case where the terminal device is configured with the parameter dl-P0-PSFCH. If the terminal device is not configured with the parameter dl-P0-PSFCH, the terminal device will autonomously select N in the order of increasing priority values. Tx,PSFCH (N Tx,PSFCH ≥1) PSFCH, each PSFCH transmit power is P PSFCH,k (i) = P CMAX -10log 10 (N Tx,PSFCH )[dBm].

[0183] Factor 3: Transmit power of a PSFCH

[0184] In the time domain symbol corresponding to the PSFCH transmission opportunity or PSFCH transmission resource, there are multiple PSFCHs to be sent, and the terminal needs to select N from them. Tx,PSFCH PSFCHs are sent, and the transmit power of each selected PSFCH is determined. The embodiment of the present application does not specifically limit the manner in which the terminal device determines the transmit power of a PSFCH. For example, in some implementations, the terminal device may determine the transmit power of a PSFCH based on one or more of the following:

[0185] The number of PSFCHs selected by the terminal device, that is, N Tx,PSFCH ;

[0186] Transmit power of a single PSFCH;

[0187] a first maximum transmit power;

[0188] The number of PSFCHs to be sent by the terminal device is recorded as N sch,Tx,PSFCH ;

[0189] The priority corresponding to PSFCH;

[0190] The number of dedicated PRBs contained in a PSFCH transmission resource.

[0191] The first maximum transmit power may be determined based on the configured maximum output power. The configured maximum output power may be determined based on pre-configured information and / or configuration information of the network device. For example, the configured maximum output power may be determined based on a high-level parameter sl-maxTxPower. For example, the first maximum transmit power may be determined using P CMAX Indicates that the unit is dBm.

[0192] A more specific example of how the terminal device determines the transmit power of a PSFCH is given below.

[0193] For example, the terminal device may determine the transmit power of a PSFCH based on the number of dedicated PRBs included in a PSFCH, and select N Tx,PSFCH For PSFCH transmission k in PSFCH transmission opportunity i, 1≤k≤N Tx,PSFCH , PSFCH can be selected based on the following method and the transmission power P of a PSFCH can be determined PSFCH,k (i).

[0194] First, if the terminal device is configured with the parameter dl-P0-PSFCH, the transmit power of a single PSFCH is determined based on the following formula:

[0195] P PSFCH,one =P O,PSFCH +10log 10 (2 μ ·K3)+α PSFCH PL [dBm] K3 represents the number of dedicated PRBs included in a PSFCH transmission resource, and the meanings of the other parameters are the same as those in embodiment 1.1 and are not described here in detail.

[0196] In determining P PSFCH,one After that, we can make judgments based on different situations, and determine the N Tx,PSFCH May be different.

[0197] Case 1: If N sch,Tx,PSFCH ≤N max,PSFCH

[0198] ③Case 1-1: If P is satisfied PSFCH,one +10log 10 (N sch,Tx,PSFCH )≤P CMAX

[0199] In case 1-1, N Tx,PSFCH =N sch,Tx,PSFCH ;P PSFCH,k (i) = P PSFCH,one [dBm].

[0200] ③ Case 1-2: If P is satisfied PSFCH,one +10log 10 (N sch,Tx,PSFCH )>P CMAX

[0201] Among them, P CMAX Indicates the first maximum transmit power or is determined based on the first maximum transmit power.

[0202] In case 1-2, the terminal device autonomously determines N in the order of increasing priority value. Tx,PSFCH PSFCHs (i.e., the priority value of the selected PSFCH is less than or equal to the priority value of the unselected PSFCH). In the process of selecting PSFCH, the terminal device first selects the PSFCH carrying HARQ-ACK information, and then selects the PSFCH carrying conflict information. Tx,PSFCH PSFCHs satisfy: For PSFCH carrying HARQ-ACK information, M i (1≤i≤8) represents the number of PSFCHs corresponding to the priority value i; for PSFCHs carrying conflicting information, M i (i>8) indicates the number of PSFCHs corresponding to the priority value (i-8); K is the maximum value that satisfies the following formula: Otherwise K=0.

[0203] In case 1-2, P PSFCH,k (i) = min(P CMAX -10log 10 (N Tx,PSFCH ),P PSFCH,one )[dBm].

[0204] Case 2: If N sch,Tx,PSFCH >N max,PSFCH

[0205] In case 2, the terminal device autonomously determines N in the order of increasing priority values. max,PSFCH PSFCH.

[0206] ③Case 2-1: If P is satisfied PSFCH,one +10log 10 (N max,PSFCH )≤P CMAX

[0207] In case 2-1, N Tx,PSFCH =N max,PSFCH ;P PSFCH,k (i) = P PSFCH,one [dBm].

[0208] ③Case 2-2: If P is satisfied PSFCH,one +10log 10 (N max,PSFCH )>P CMAX

[0209] Among them, P CMAX Indicates the first maximum transmit power or is determined based on the first maximum transmit power.

[0210] In case 2-2, the terminal device autonomously determines N in the order of increasing priority values. Tx,PSFCH PSFCHs (i.e., the priority value of the selected PSFCH is less than or equal to the priority value of the unselected PSFCH). In the process of selecting PSFCH, the terminal device first selects the PSFCH carrying HARQ-ACK information, and then selects the PSFCH carrying conflict information. Tx,PSFCH PSFCHs satisfy: For PSFCH carrying HARQ-ACK information, M i (1≤i≤8) represents the number of PSFCHs corresponding to the priority value i; for PSFCHs carrying conflicting information, M i (i>8) indicates the number of PSFCHs corresponding to the priority value (i-8); K is the maximum value that satisfies the following formula: Otherwise K=0.

[0211] In case 2-2, P PSFCH,k (i) = min(P CMAX -10log 10 (N Tx,PSFCH ),P PSFCH,one )[dBm].

[0212] The above description is the case where the terminal device is configured with the parameter dl-P0-PSFCH. If the terminal device is not configured with the parameter dl-P0-PSFCH, the terminal device will autonomously select N in the order of increasing priority values. Tx,PSFCH (N Tx,PSFCH ≥1) PSFCH, each PSFCH transmit power is P PSFCH,k (i) = P CMAX -10log 10 (N Tx,PSFCH )[dBm].

[0213] It should be noted that the N selected by the terminal device Tx,PSFCH The transmission power P of each PSFCH PSFCH,k (i) are equal, that is, the transmission power of a PSFCH is PPSFCH,k (i).

[0214] Factor 4: Correlation between the transmit power on a PRB in a public comb and the transmit power on a dedicated PRB

[0215] In some implementations, the association between the transmit power on a PRB in the common comb teeth and the transmit power on a dedicated PRB includes: a difference between the transmit power on a PRB in the common comb teeth and the transmit power on a dedicated PRB.

[0216] Optionally, if the difference between the transmit power on one PRB in the common comb teeth and the transmit power on one dedicated PRB is 0 dB, it may indicate that the transmit power on the PRB in the common comb teeth is the same as that on the dedicated PRB.

[0217] In some implementations, the association between the transmit power on one PRB in the common comb teeth and the transmit power on one dedicated PRB includes: a ratio of the transmit power on one PRB in the common comb teeth to the transmit power on one dedicated PRB.

[0218] Optionally, if the ratio of the transmit power on a PRB in the common comb teeth to the transmit power on a dedicated PRB is 1, it may indicate that the transmit power on the PRB in the common comb teeth is the same as that on the dedicated PRB.

[0219] The association between the transmit power on a PRB in a common comb and the transmit power on a dedicated PRB may be determined autonomously by the terminal device, or may be determined based on pre-configuration information and / or configuration information of the network device.

[0220] In some implementations, the pre-configuration information and / or the configuration information of the network device includes first indication information, or the sideline BWP configuration information or the resource pool configuration information includes the first indication information, and the first indication information is used to indicate the association between the transmit power on a PRB in the common comb and the transmit power on a dedicated PRB. For example, the configuration information of the network device includes the first indication information, and the first indication information indicates the difference between the transmit power on a PRB in the common comb and the transmit power on a dedicated PRB. The difference can be expressed in decibels. Exemplarily, the difference indicated by the first indication information is -3dB, that is, the first indication information indicates that the transmit power on the PRB in the common comb is 3dB lower than the transmit power on the dedicated PRB.

[0221] For another example, the configuration information of the network device includes first indication information, where the first indication information indicates a ratio of the transmit power on one PRB in a common comb tooth to the transmit power on one dedicated PRB. Exemplarily, the ratio indicated by the first indication information is 0.5, i.e., the first indication information indicates that the transmit power on the PRB in the common comb tooth is half the transmit power on the dedicated PRB.

[0222] Factor 5: N Tx,PSFCH The number of PRBs in the common comb corresponding to the PSFCH (total number) K1

[0223] In some implementations, the value of K1 may be determined based on one or more of the following:

[0224] N Tx,PSFCH The number of RB sets A corresponding to each PSFCH;

[0225] N Tx,PSFCH The RB set corresponding to the PSFCH;

[0226] Index information of public combs;

[0227] The number of PRBs contained in the common comb;

[0228] The number of reference PRBs contained in a comb tooth in an RB set.

[0229] Optionally, the value of K1 can be based on N Tx,PSFCH The number of RB sets A corresponding to each PSFCH is determined. For example, the resource pool includes 4 RB sets. In one PSFCH transmission opportunity, the terminal device selects N Tx,PSFCH If the PSFCHs are located in 3 RB sets among the 4 RB sets, the value of A can be 3.

[0230] Optionally, the value of K1 can be based on N Tx,PSFCH The RB set (or RB set information, such as the index information of the RB set) corresponding to each PSFCH is determined. For example, the resource pool includes 4 RB sets, and the indexes of the RB sets corresponding to the 4 RB sets are 0, 1, 2, and 3 respectively. In one PSFCH transmission opportunity, the terminal device selects N Tx,PSFCH The PSFCHs are located in three of the four RB sets, and the RB set indices corresponding to the three RB sets are 0, 1, and 2 respectively. In this case, N Tx,PSFCH The RB sets corresponding to the PSFCHs are RB set 0, RB set 1 and RB set 2.

[0231] Optionally, the value of K1 may be determined based on index information of the common comb teeth. The index information of the common comb teeth may be determined based on, for example, pre-configured information and / or configuration information of the network device.

[0232] In some embodiments, the index information of the common comb teeth in different RB sets is the same. For example, the resource pool includes 4 RB sets, and the indexes of the RB sets corresponding to the 4 RB sets are 0, 1, 2, and 3, respectively. The number of comb teeth is 5, corresponding to comb tooth indices 0, 1, 2, 3, and 4, respectively. The index of the common comb teeth configured by the pre-configuration information and / or the configuration information of the network device is 0, that is, comb tooth 0 in each RB set is the common comb tooth used to transmit PSFCH. For any RB set, the common comb teeth included in the transmission resources of PSFCH therein are all comb teeth with an index of 0.

[0233] Optionally, the value of K1 can be determined based on the number of PRBs contained in the common comb teeth in an RB set. For example, the resource pool includes 4 RB sets, and the RB set indices corresponding to the 4 RB sets are 0, 1, 2, and 3 respectively. In a PSFCH transmission opportunity, the terminal device selects N Tx,PSFCH The PSFCHs are located in three RB sets, with RB set indices corresponding to these three RB sets being 0, 1, and 2, respectively. In each RB set, the comb tooth with index 0 is the common comb tooth. In RB set 0, comb tooth 0 includes 10 PRBs, in RB set 1, comb tooth 0 includes 11 PRBs, and in RB set 2, comb tooth 0 includes 10 PRBs. Therefore, the common comb teeth in an RB set contain 10, 11, and 10 PRBs, respectively. The value of K1 is the total number of PRBs included in the common comb teeth in these three RB sets, i.e., K1 = 31.

[0234] The number of PRBs included in a common comb in an RB set may be determined based on, for example, pre-configuration information and / or configuration information of a network device.

[0235] For example, the configuration information of the network device includes parameter a, which is used to indicate the number of PRBs included in one comb tooth. The number of PRBs included in the common comb tooth can be determined according to parameter a.

[0236] For another example, the index of the common comb tooth is determined based on pre-configuration information and / or network configuration information. Then, the corresponding comb tooth in an RB set can be determined based on the index, and the number of PRBs corresponding to the comb tooth can be determined.

[0237] For example, based on pre-configuration information and / or network device configuration information, the PRBs included in the inter-cell protection band configured between two adjacent RB sets are determined, and the PRBs included in each RB set are determined. Based on resource pool configuration information, the RB set information included in the resource pool can be determined, and the PRBs included in each RB set in the resource pool and the number of PRBs included in each comb tooth in each RB set can be determined. Since a common comb tooth is also a comb tooth in an RB set, the number of PRBs corresponding to the common comb tooth can be determined.

[0238] Optionally, the value of K1 can be based on the number of reference PRBs contained in a comb tooth in an RB set (denoted as ) is determined. In some implementations, The determination may be based on one or more of the following: protocol predefined information, preconfiguration information, network device configuration information, side BWP configuration information, resource pool configuration information. For example, the preconfiguration information and / or network device configuration information may include parameter b, which is used to indicate The value of .

[0239] As an example, the value of K1 can be determined based on the following formula (or K1 satisfies the following formula):

[0240] Where A represents N Tx,PSFCH The number of RB sets corresponding to PSFCHs, RBset_a represents N Tx,PSFCH The ath RB set among the A RB sets corresponding to the PSFCH, K4 RBset_a A represents the number of PRBs included in the common comb teeth in the a-th RB set, where a is a positive integer and 1≤a≤A.

[0241] It should be noted that N Tx,PSFCH The number of RB sets A corresponding to the PSFCH is based on the N Tx,PSFCH The number of RB sets with different RB set indices corresponding to each PSFCH is determined. Tx,PSFCH=3, if the three PSFCHs are all located in RB set 0, then A=1, if the common comb teeth in RB set 0 include 10 PRBs, then K1=10; if the first PSFCH is located in RB set 0, the second PSFCH is located in RB set 1, and the third PSFCH is located in RB set 2, then A=3, if the number of PRBs included in the common comb teeth in RB set 0, RB set 1 and RB set 2 are 10, 11 and 10 respectively, then K1=31; if the first PSFCH and the second PSFCH are located in RB set 0, and the third PSFCH is located in RB set 2, then A=2, if the number of PRBs included in the common comb teeth in RB set 0 and RB set 2 are 10 and 11 respectively, then K1=21.

[0242] As another example, the value of K1 can be determined based on the following formula (or K1 satisfies the following formula):

[0243] Where A represents N Tx,PSFCH The number of RB sets corresponding to PSFCHs, Indicates the number of reference PRBs contained in a comb tooth in an RB set. The method for determining A is the same as in the previous example and is not repeated here. The number of reference PRBs contained in a comb tooth in an RB set is determined based on protocol predefined information, preconfigured information, or network configuration information.

[0244] Factor 6: Minimum transmit power on a PRB in a common comb

[0245] This factor determines the minimum or lowest value of the transmit power on a PRB in the common comb. For example, the minimum transmit power on a PRB can be determined based on protocol predefined information, preconfigured information, or network configuration information, and the minimum value of the transmit power on a PRB in the common comb can be determined based on this information.

[0246] The foregoing describes in detail the factors that may be considered when determining the transmit power of the first PRB (referring to a PRB used to transmit the first PSFCH). The following describes several possible ways to determine the first PRB.

[0247] Method 1:

[0248] The first PRB is a dedicated PRB, and the transmit power of the first PRB may be determined based on (or satisfies) the following formula:

[0249] Among them, P dedicated Indicates the transmit power of the first PRB, expressed as a power value, such as milliwatts (mW); P one Indicates the transmit power of a PSFCH, based on P in the above factor 3PSFCH,k (i) Determine, for example, P one P PSFCH,k (i) (expressed in dBm) corresponds to the power value; K1 represents N Tx,PSFCH K3 represents the number of PRBs in the common comb corresponding to the PSFCH, K3 represents the number of dedicated PRBs contained in a PSFCH, and k is determined based on the ratio of the transmit power on one PRB in the common comb to the transmit power on one dedicated PRB (for example, k is equal to the ratio of the transmit power on one PRB in the common comb to the transmit power on one dedicated PRB).

[0250] Furthermore, if the terminal device selects N Tx,PSFCH The transmit power on each dedicated PRB in the PSFCH is determined in the above manner, then the N Tx,PSFCH The total transmit power of the dedicated PRBs in the PSFCH can be determined based on (or satisfy) the following formula:

[0251] Method 2:

[0252] The first PRB is a dedicated PRB, and the transmit power of the first PRB may be determined based on (or satisfies) the following formula:

[0253] Among them, P dedicated_dB is the transmit power of the first PRB expressed in decibels, P one_dB is the transmit power of a PSFCH expressed in decibels, P one_dB Based on the P in the above factor three PSFCH,k (i) Determine, if P one_dB =P PSFCH,k (i), K1 represents N Tx,PSFCH K3 represents the number of PRBs in the common comb corresponding to the PSFCH, K3 represents the number of dedicated PRBs contained in a PSFCH, and k is determined based on the ratio of the transmit power on one PRB in the common comb to the transmit power on one dedicated PRB (for example, k is equal to the ratio of the transmit power on one PRB in the common comb to the transmit power on one dedicated PRB).

[0254] Furthermore, if the terminal device selects N Tx,PSFCH The transmit power on each dedicated PRB in the PSFCH is determined in the above manner, then the N Tx,PSFCH The total transmit power of the dedicated PRBs in the PSFCH can be determined based on (or satisfy) the following formula:

[0255] Method 3:

[0256] The first PRB is a dedicated PRB, and the transmit power of the first PRB may be determined based on (or satisfies) the following formula:

[0257] Among them, P dedicated Indicates the transmit power of the first PRB, expressed as a power value, such as milliwatts (mW); P one Indicates the transmit power of a PSFCH, based on P in the above factor 3 PSFCH,k (i) Determine, for example, P one P PSFCH,k (i) (expressed in dBm) corresponds to the power value; K1 represents N Tx,PSFCH The number of PRBs in the common comb corresponding to the PSFCH, K3 represents the number of dedicated PRBs contained in a PSFCH, and k is determined based on the difference between the transmit power on one PRB in the common comb and the transmit power on one dedicated PRB (for example, k is equal to the difference between the transmit power on one PRB in the common comb and the transmit power on one dedicated PRB, expressed in decibels).

[0258] Furthermore, if the terminal device selects N Tx,PSFCH The transmit power on each dedicated PRB in the PSFCH is determined in the above manner, then the N Tx,PSFCH The total transmit power of the dedicated PRBs in the PSFCH can be determined based on (or satisfy) the following formula:

[0259] Method 4:

[0260] The first PRB is a dedicated PRB, and the transmit power of the first PRB may be determined based on (or satisfies) the following formula:

[0261] Among them, P dedicated_dB is the transmit power of the first PRB expressed in decibels, P one_dB is the transmit power of a PSFCH expressed in decibels, P one_dB Based on the P in the above factor three PSFCH,k (i) Determine, if P one_dB =P PSFCH,k (i), K1 represents N Tx,PSFCH K3 represents the number of PRBs in the common comb corresponding to the PSFCH, K3 represents the number of dedicated PRBs contained in a PSFCH, and k is determined based on the difference between the transmit power on one PRB in the common comb and the transmit power on one dedicated PRB (for example, k is equal to the difference between the transmit power on one PRB in the common comb and the transmit power on one dedicated PRB).

[0262] Furthermore, if the terminal device selects N Tx,PSFCH The transmit power on each dedicated PRB in the PSFCH is determined in the above manner, then the N Tx,PSFCH The total transmit power of the dedicated PRBs in the PSFCH can be determined based on (or satisfy) the following formula:

[0263] Method 5:

[0264] The first PRB is a PRB in a common comb (or called a common PRB). The transmit power of the first PRB may be determined based on (or satisfies) the following formula:

[0265] Among them, P common Indicates the transmit power of the first PRB, expressed as a power value, such as milliwatts (mW); P one Indicates the transmit power of a PSFCH, based on P in the above factor 3 PSFCH,k (i) Determine, for example, P one P PSFCH,k (i) (expressed in dBm) corresponds to the power value; K1 represents N Tx,PSFCH K3 represents the number of PRBs in the common comb corresponding to the PSFCH, K3 represents the number of dedicated PRBs contained in a PSFCH, and k is determined based on the ratio of the transmit power on one PRB in the common comb to the transmit power on one dedicated PRB (for example, k can be equal to the ratio of the transmit power on one PRB in the common comb to the transmit power on one dedicated PRB).

[0266] Furthermore, if the terminal device selects N Tx,PSFCH The transmit power on each common PRB in the PSFCH is determined in the above manner, then the N Tx,PSFCH The total transmit power of the common PRBs in the PSFCHs can be determined based on (or satisfy) the following formula:

[0267] Method 6:

[0268] The first PRB is a PRB in a common comb (or called a common PRB). The transmit power of the first PRB may be determined based on (or satisfies) the following formula:

[0269] Among them, P common_dB is the transmit power of the first PRB expressed in decibels, P one_dB is the transmit power of a PSFCH expressed in decibels, P one_dB Based on the P in the above factor three PSFCH,k (i) Determine, if P one_dB =PPSFCH,k (i), K1 represents N Tx,PSFCH K3 represents the number of PRBs in the common comb corresponding to the PSFCH, K3 represents the number of dedicated PRBs contained in a PSFCH, and k is determined based on the ratio of the transmit power on one PRB in the common comb to the transmit power on one dedicated PRB (for example, k can be equal to the ratio of the transmit power on one PRB in the common comb to the transmit power on one dedicated PRB).

[0270] Furthermore, if the terminal device selects N Tx,PSFCH The transmit power on each common PRB in the PSFCH is determined in the above manner, then the N Tx,PSFCH The total transmit power of the common PRBs in the PSFCHs can be determined based on (or satisfy) the following formula:

[0271] Method 7:

[0272] The first PRB is a PRB in a common comb (or called a common PRB). The transmit power of the first PRB can be determined based on (or satisfies) the following formula: common =k·P dedicated [mW] (13);

[0273] Among them, P dedicated represents the transmission power on the dedicated PRB, which can be determined based on method 1, for example, and k is determined based on the ratio of the transmission power on one PRB in the common comb to the transmission power on one dedicated PRB (for example, k is equal to the ratio of the transmission power on one PRB in the common comb to the transmission power on one dedicated PRB).

[0274] Method 8:

[0275] The first PRB is a PRB in a common comb (or called a common PRB). The transmit power of the first PRB may be determined based on (or satisfies) the following formula:

[0276] Among them, P common Indicates the transmit power of the first PRB, expressed as a power value, such as milliwatts (mW); P one Indicates the transmit power of a PSFCH, based on P in the above factor 3 PSFCH,k (i) Determine, for example, P one P PSFCH,k (i) (expressed in dBm) corresponds to the power value; K1 represents N Tx,PSFCHThe number of PRBs in the common comb corresponding to the PSFCH, K3 represents the number of dedicated PRBs contained in a PSFCH, and k is determined based on the difference between the transmit power on one PRB in the common comb and the transmit power on one dedicated PRB (for example, k can be equal to the difference between the transmit power on one PRB in the common comb and the transmit power on one dedicated PRB).

[0277] Furthermore, if the terminal device selects N Tx,PSFCH The transmit power on each common PRB in the PSFCH is determined in the above manner, then the N Tx,PSFCH The total transmit power of the common PRBs in the PSFCHs can be determined based on (or satisfy) the following formula:

[0278] Method 9:

[0279] The first PRB is a PRB in a common comb (or called a common PRB). The transmit power of the first PRB may be determined based on (or satisfies) the following formula:

[0280] Among them, P common_dB is the transmit power of the first PRB expressed in decibels, P one_dB is the transmit power of a PSFCH expressed in decibels, P one_dB Based on the P in the above factor three PSFCH,k (i) Determine, if P one_dB =P PSFCH,k (i), K1 represents N Tx,PSFCH The number of PRBs in the common comb corresponding to the PSFCH, K3 represents the number of dedicated PRBs contained in a PSFCH, and k is determined based on the difference between the transmit power on one PRB in the common comb and the transmit power on one dedicated PRB (for example, k can be equal to the difference between the transmit power on one PRB in the common comb and the transmit power on one dedicated PRB).

[0281] Furthermore, if the terminal device selects N Tx,PSFCH The transmit power on each common PRB in the PSFCH is determined in the above manner, then the N Tx,PSFCH The total transmit power of the common PRBs in the PSFCHs can be determined based on (or satisfy) the following formula:

[0282] Method 10:

[0283] The first PRB is a PRB in a common comb (or called a common PRB). The transmit power of the first PRB can be determined based on (or satisfies) the following formula: common_dB =Pdedicated_dB +k[dBm] (18);

[0284] Among them, P common_dB is the transmit power of the first PRB expressed in decibels, P dedicated_dB is the transmit power on a dedicated PRB expressed in decibels, P dedicated_dB For example, it can be determined based on method 4. k is determined based on the difference between the transmit power on one PRB in the common comb teeth and the transmit power on one dedicated PRB (for example, k can be equal to the difference between the transmit power on one PRB in the common comb teeth and the transmit power on one dedicated PRB, expressed in decibels).

[0285] Method 11:

[0286] The first PRB is a dedicated PRB, and the transmit power of the first PRB can be determined based on (or satisfies) the following formula: dedicated_dB =P one_dB -10log 10 (K3)[dBm] (19);

[0287] Among them, P dedicated_dB is the transmit power of the first PRB expressed in decibels, P one_dB is the transmit power of a PSFCH expressed in decibels, P one_dB Based on the P in the above factor three PSFCH,k (i) Determine, if P one_dB =P PSFCH,k (i) The terminal device determines the transmit power on the PRB corresponding to the common comb teeth based on the implementation, so that N Tx,PSFCH The total transmit power of the dedicated PRBs in the PSFCHs and the total transmit power of the PRBs on the common comb teeth shall not exceed the first maximum transmit power (i.e., P CMAX ).

[0288] Method 12:

[0289] The minimum or lowest value of the transmit power on a PRB (denoted as P) is determined based on pre-configuration information and / or network configuration information. min ), N Tx,PSFCH The total transmission power of the PRBs in the common comb corresponding to the PSFCH is K1·P min , where K1 represents N Tx,PSFCH The total number of PRBs in the common comb corresponding to the PSFCH. The transmit power on the dedicated PRB corresponding to the PSFCH transmission resource is determined based on one or more of the following:

[0290] The minimum or lowest value of transmit power on a PRB;

[0291] N selected by the terminal device Tx,PSFCH The number of PSFCHs;

[0292] N Tx,PSFCH The total number of PRBs in the common comb corresponding to the PSFCH;

[0293] a first maximum transmit power;

[0294] The number of dedicated PRBs included in a PSFCH transmission resource is K3;

[0295] The transmit power of one PSFCH.

[0296] In one implementation, the first PRB is a PRB in a common comb, and the transmit power of the first PRB may be based on the minimum or lowest value of the transmit power on a PRB (ie, P min ) is determined. Specifically, P common =C·P min [mW] (20);

[0297] The value of C is determined based on protocol pre-defined, pre-configured information, or network configuration information. By default, the value of C is 1.

[0298] In one implementation, the first PRB is a dedicated PRB, and the transmit power of the first PRB may be determined based on (or satisfy) the following formula:

[0299] or,

[0300] or,

[0301] Wherein, P2 is determined based on the first maximum transmit power, such as Alternatively, P2 is based on the transmit power of a PSFCH (i.e., P one ) Determine, for example, P2 = N Tx,PSFCH ·P one ;P one Based on the P in the above factor three PSFCH,k (i) Determine, for example, P one P PSFCH,k (i) (expressed in dBm) corresponds to the power value, that is, P common It can be determined based on formula (20). It should be understood that when C=1 in formula (20), P in the above formulas (21), (22) and (23) is common Can be replaced by P min . min() means taking the minimum value operation, and max() means taking the maximum value operation.

[0302] It should be noted that formula (20), formula (21), formula (22) and formula (23) can also be expressed in decibel-based or decibel-milli (dBm)-based forms, which will not be repeated here.

[0303] It should be noted that in formulas (1) to (12), (14) to (17), (21) to (23), N Tx,PSFCH K3 represents N Tx,PSFCH The number of dedicated PRBs corresponding to each PSFCH. If the dedicated PRBs corresponding to different PSFCH transmission resources are different, then N Tx,PSFCH The number of dedicated PRBs corresponding to each PSFCH is equal to N Tx,PSFCH K3. If the dedicated PRBs corresponding to the transmission resources of different PSFCHs may be the same, then N Tx,PSFCH The number of dedicated PRBs corresponding to each PSFCH is recorded as K5, and N in the above formula is Tx,PSFCH K3 is replaced by K5.

[0304] It should be noted that, in the above method, when the first PRB is a PRB in a common comb, the transmit power of the first PRB is the sum of the transmit powers of the target PSFCH. The target PSFCH mentioned here is the N selected by the terminal device. Tx,PSFCH The transmission resources in the PSFCHs include the PSFCH of the common comb. For example, if the terminal device selects N Tx,PSFCH If the frequency domain resources of S PSFCHs (S is a positive integer greater than or equal to 1) among the PSFCHs include the common comb teeth, then the S PSFCHs are the target PSFCHs mentioned above, and the transmit power of the first PRB is the sum of the transmit powers of the S PSFCHs on the first PRB.

[0305] After determining the transmit power on the PRBs of the common comb teeth and the transmit power on the dedicated PRBs, the terminal device determines whether the sum of the transmit power on the PRBs of the common comb teeth and the transmit power on the dedicated PRBs exceeds the first maximum transmit power (i.e., P CMAX The corresponding power value) If the first maximum transmit power is not exceeded, the terminal device can use the transmit power of the PRB on the public comb teeth and the transmit power on the dedicated PRB to send PSFCH. Otherwise, the terminal device needs to adjust the transmit power on the PRB. Specifically, the transmit power on each PRB can be adjusted in the following way. The sum of the transmit power of the PRB on the public comb teeth and the transmit power on the dedicated PRB is recorded as P sum , that is, P sum =P common_sum +P dedicated_sum(twenty four)

[0306] Among them, P common_sum represents the sum of the transmit powers on the PRBs of the common comb, for example, P common_sum Determined based on the above formula (10) or formula (15); P dedicated_sum represents the sum of the transmit powers on dedicated PRBs, for example, P dedicated_sum Determined based on the above formula (2) or formula (6).

[0307] In one embodiment, the transmit power on the PRBs of the common comb teeth is reduced so that the total transmit power is not greater than or does not exceed the first maximum transmit power. In this embodiment, only the transmit power on the PRBs of the common comb teeth is reduced, and the transmit power on the dedicated PRBs is not reduced. For example, the terminal device can reduce the transmit power on the PRBs of the common comb teeth based on the terminal device implementation, so that the sum of the transmit power on the PRBs of the common comb teeth and the transmit power on the dedicated PRBs does not exceed the first maximum transmit power. For another example, the terminal device can proportionally reduce the transmit power on all PRBs of the common comb teeth, and the proportional factor is determined based on the first maximum transmit power, the sum of the transmit power of the PRBs on the common comb teeth, and the sum of the transmit power on the dedicated PRBs. For example, the proportional factor s1 is determined based on the following formula:

[0308] Wherein, P1 is determined based on the first maximum transmit power, for example, P1 is P CMAX The corresponding power value is

[0309] The transmit power of the common comb PRB is adjusted based on the proportional factor: P common_adju =s1·P common .

[0310] Among them, P common Indicates the transmit power on a common comb PRB, for example, P common Determined based on the above formula (9), formula (13) or formula (14).

[0311] In another embodiment, the terminal device reduces the transmit power on the common comb teeth and the dedicated PRBs so that the total transmit power is not greater than or does not exceed the first maximum transmit power. In this embodiment, the transmit power on the common comb teeth PRBs and the transmit power on the dedicated PRBs are reduced at the same time. For example, the terminal device reduces the transmit power on all common comb teeth PRBs and dedicated PRBs in equal proportion, and the proportional factor is determined based on the first maximum transmit power, the sum of the transmit power of the PRBs on the common comb teeth, and the sum of the transmit power on the dedicated PRBs. For example, the proportional factor s2 is determined based on the following formula:

[0312] Wherein, P1 is determined based on the first maximum transmit power, for example, P1 is P CMAX The corresponding power value is

[0313] The transmit power of the common comb PRB is adjusted based on the proportional factor: P common_adju =s2·P common ;

[0314] The transmit power of a dedicated PRB is adjusted based on a scaling factor: P dedicated_adju =s2·P dedicated ;

[0315] Among them, P common Indicates the transmit power on a common comb PRB, for example, P common Determined based on the above formula (9), formula (13) or formula (14); P dedicated Indicates the transmit power on a dedicated PRB, for example, P dedicated Determined based on the above formula (1) or formula (5).

[0316] To facilitate understanding, the following describes in more detail the method for determining the transmit power of the PSFCH in the first structure, using specific examples. It should be noted that the following examples are intended solely to help those skilled in the art understand the embodiments of the present application, and are not intended to limit the embodiments of the present application to the specific numerical values ​​or specific scenarios illustrated. Those skilled in the art will readily be able to make various equivalent modifications or variations based on the examples provided below, and such modifications or variations also fall within the scope of the embodiments of the present application.

[0317] In the SL-U system, PSFCH supports power control based on downlink path loss, but does not support power control based on sidelink path loss. In the SL-U system, a terminal device can send multiple PSFCHs in one symbol. The maximum number of PSFCHs sent simultaneously by a terminal device does not exceed the maximum number of PSFCHs to be sent, N. max,PSFCH . N max,PSFCH The value of is related to the capability of the terminal device. For a certain transmission opportunity, the number of PSFCHs to be sent by the terminal device is N sch,Tx,PSFCH The N sch,Tx,PSFCH The PSFCHs may include a PSFCH for carrying HARQ-ACK information of a PSSCH and / or a PSFCH for carrying contention information.

[0318] Step 1: Select N on the terminal device Tx,PSFCH PSFCH.

[0319] In step 1, the terminal device can determine the transmit power of a PSFCH based on the number of dedicated PRBs included in a PSFCH, and select N Tx,PSFCH For PSFCH transmission k in PSFCH transmission opportunity i, 1≤k≤N Tx,PSFCH , PSFCH can be selected based on the following method.

[0320] First, if the terminal device is configured with the parameter dl-P0-PSFCH, the transmit power of a single PSFCH is determined based on the following formula: PSFCH,one =P O,PSFCH +10log 10 (2 μ ·K3)+α PSFCH PL[dBm] (27).

[0321] In the above formula (27), P O,PSFCH Indicates the P0 value for power control based on downlink path loss. O,PSFCH Determined based on the parameter dl-P0-PSFCH. PSFCH Represents the downlink path loss compensation factor. α PSFCH Determined based on the parameter dl-Alpha-PSFCH. If the higher layer does not configure α PSFCH , then α PSFCH The corresponding value can be 1. PL represents the downlink path loss. K3 is determined based on the number of dedicated PRBs occupied by a PSFCH (for example, K3 can be the number of dedicated PRBs occupied by a PSFCH). μ is determined based on the sidecarrier spacing. The relationship between μ and subcarrier spacing can be seen in Table 1 above.

[0322] In different situations, the N selected by the terminal device Tx,PSFCH The number of PSFCHs and the determined transmit power of a PSFCH may be different, which will be discussed below in different cases.

[0323] Case 1: If N sch,Tx,PSFCH ≤N max,PSFCH

[0324] ③Case 1-1: If P is satisfied PSFCH,one +10log 10 (N sch,Tx,PSFCH )≤P CMAX

[0325] In case 1-1, N Tx,PSFCH =N sch,Tx,PSFCH ;P PSFCH,k (i) = P PSFCH,one [dBm].

[0326] ③ Case 1-2: If P is satisfied PSFCH,one +10log 10 (N sch,Tx,PSFCH )>P CMAX

[0327] Among them, P CMAX Indicates the first maximum transmit power or is determined based on the first maximum transmit power.

[0328] In case 1-2, the terminal device autonomously determines N in the order of increasing priority value. Tx,PSFCH PSFCHs (i.e., the priority value of the selected PSFCH is less than or equal to the priority value of the unselected PSFCH). In the process of selecting PSFCH, the terminal device first selects the PSFCH carrying HARQ-ACK information, and then selects the PSFCH carrying conflict information. Tx,PSFCH PSFCHs satisfy: For PSFCH carrying HARQ-ACK information, M i (1≤i≤8) represents the number of PSFCHs corresponding to the priority value i; for PSFCHs carrying conflicting information, M i (i>8) indicates the number of PSFCHs corresponding to the priority value (i-8); K is the maximum value that satisfies the following formula: Otherwise K=0.

[0329] In case 1-2, P PSFCH,k (i) = min(P CMAX -10log 10 (N Tx,PSFCH ),P PSFCH,one )[dBm].

[0330] Case 2: If N sch,Tx,PSFCH >N max,PSFCH

[0331] In case 2, the terminal device autonomously determines N in the order of increasing priority values. max,PSFCH PSFCH.

[0332] ③Case 2-1: If P is satisfied PSFCH,one +10log 10 (N max,PSFCH )≤P CMAX

[0333] In case 2-1, N Tx,PSFCH =N max,PSFCH ;P PSFCH,k (i) = P PSFCH,one [dBm].

[0334] ③Case 2-2: If P is satisfied PSFCH,one +10log 10 (N max,PSFCH )>P CMAX

[0335] Among them, P CMAX Indicates the first maximum transmit power or is determined based on the first maximum transmit power.

[0336] In case 2-2, the terminal device autonomously determines N in the order of increasing priority values. Tx,PSFCH PSFCHs (i.e., the priority value of the selected PSFCH is less than or equal to the priority value of the unselected PSFCH). In the process of selecting PSFCH, the terminal device first selects the PSFCH carrying HARQ-ACK information, and then selects the PSFCH carrying conflict information. Tx,PSFCH PSFCHs satisfy: For PSFCH carrying HARQ-ACK information, M i (1≤i≤8) represents the number of PSFCHs corresponding to the priority value i; for PSFCHs carrying conflicting information, M i (i>8) indicates the number of PSFCHs corresponding to the priority value (i-8); K is the maximum value that satisfies the following formula: Otherwise K=0.

[0337] In case 2-2, P PSFCH,k (i) = min(P CMAX -10log 10 (N Tx,PSFCH ),P PSFCH,one )[dBm].

[0338] The above description is the case where the terminal device is configured with the parameter dl-P0-PSFCH. If the terminal device is not configured with the parameter dl-P0-PSFCH, the terminal device will autonomously select N in the order of increasing priority values. Tx,PSFCH (N Tx,PSFCH ≥1) PSFCH, each PSFCH transmit power is P PSFCH,k (i) = P CMAX -10log 10 (N Tx,PSFCH )[dBm].

[0339] In the PSFCH selection process described in step 1, the terminal device selected the PSFCH based solely on the dedicated PRBs included in the PSFCH, without considering the transmit power of the PRBs in the common comb. When determining the transmit power of each PSFCH PRB, it is necessary to determine the transmit power of both the dedicated PRBs and the PRBs in the common comb. Therefore, after performing step 1, it is necessary to proceed to step 2.

[0340] Step 2: Determine the transmit power on one PRB used to transmit the PSFCH.

[0341] In step 1, N was selected Tx,PSFCH PSFCHs, each PSFCH includes K3 dedicated PRBs. Tx,PSFCH PSFCH includes a total of N Tx,PSFCH K3 dedicated PRBs. The transmit power of each PSFCH is P PSFCH,k dBm, then N Tx,PSFCH The total transmit power of PSFCH is N Tx,PSFCH ·P one , where P one Indicates P PSFCH,k The corresponding power value, Milliwatt (mW).

[0342] Then, N Tx,PSFCH The total transmit power of PSFCH is allocated to N Tx,PSFCH For example, the transmit power on each PRB may be determined by using one or more of the above-mentioned methods 1 to 12, which will not be described in detail here.

[0343] Example 2: The channel structure of the first PSFCH is the second structure

[0344] The following first describes the method for determining the transmit power of the first PSFCH in conjunction with Example 2.1, and then describes the method for determining the transmit power on one PRB in the first PSFCH in conjunction with Example 2.2. It should be understood that Example 2.1 and Example 2.2 can be independent of each other or can be combined with each other. For example, the transmit power of the first PSFCH can be determined according to the implementation method described in Example 2.1, and the transmit power on one PRB in the first PSFCH can be determined according to the implementation method described in Example 2.2. For another example, the transmit power on one PRB in the first PSFCH can be determined according to the implementation method described in Example 2.2, but the method for determining the transmit power of the first PSFCH is not limited. For another example, the transmit power of the first PSFCH can be determined according to the implementation method described in Example 2.1, without limiting the transmit power on one PRB in the first PSFCH.

[0345] Example 2.1: Determination of the transmit power of the first PSFCH

[0346] In some implementations, the transmit power of the first PSFCH is determined based on the number of PRBs (or actual PRBs) included in one comb tooth or the number of reference PRBs. The number of reference PRBs included in one comb tooth can be determined based on protocol predefined information, preconfigured information and / or configuration information of the network device. Exemplarily, the protocol predefined information, preconfigured information and / or configuration information of the network device include parameter Indicates the number of reference PRBs included in one comb tooth. For example, based on the protocol predefined information, the number of reference PRBs included in one comb tooth is determined to be 10, that is, Determining the transmission power of the first PSFCH based on the number of PRBs included in a comb tooth or the number of reference PRBs can match the method of determining the transmission power of the first PSFCH with the channel structure of the first PSFCH, thereby making the determined transmission power of the first PSFCH more accurate.

[0347] In some implementations, the transmit power of the first PSFCH is determined based on the number of PRBs included in one comb tooth or the number of reference PRBs, which may include: the transmit power of the first PSFCH is based on a single PSFCH (P PSFCH,one ), and the transmission power of a single PSFCH is determined based on the number of reference PRBs included in one comb tooth.

[0348] In some implementations, the transmit power of a single PSFCH may be determined based on one or more of the following:

[0349] The number of reference PRBs included in one comb tooth is

[0350] Parameters for power control based on downlink path loss;

[0351] Downlink path loss PL;

[0352] The parameter μ is determined based on the subcarrier spacing.

[0353] In some implementations, the parameter for power control based on downlink path loss may include a P0 value for power control based on downlink path loss. O,PSFCH Indicates. O,PSFCH It can be determined based on the parameter dl-P0-PSFCH configured by the higher layer.

[0354] In some implementations, the parameter for power control based on downlink path loss may include an α value for power control based on downlink path loss. PSFCH Indicates. PSFCH It can also be called the downlink path loss compensation factor. PSFCH It can be determined by the parameter dl-Alpha-PSFCH configured by the higher layer. If the higher layer does not configure this parameter, then α PSFCH The value of can be 1.

[0355] In some implementations, the downlink path loss PL may be determined based on measurements of the terminal device.

[0356] In some implementations, the value of the parameter μ determined based on the subcarrier spacing may be determined based on the subcarrier spacing. The correspondence between μ and the subcarrier spacing can be seen in Table 1 above.

[0357] Exemplarily, the transmit power of a single PSFCH may be determined based on (or satisfy) the following formula:

[0358] Example 2.2: Determination of the transmit power of the first PRB

[0359] Example 2.1 describes in detail how to determine the transmit power of the first PSFCH. Because the number of PRBs included in the comb teeth corresponding to the transmission resources of the first PSFCH may be different from the number of reference PRBs included in a comb tooth, it is also necessary to determine the transmit power of a PRB used to transmit the first PSFCH (for ease of description, this PRB will be referred to as the first PRB below).

[0360] In some implementations, the transmit power of the first PRB is determined based on one or more of the following:

[0361] The transmission power of a single PSFCH (i.e. P PSFCH,one );

[0362] N selected by the terminal device Tx,PSFCH The number of PSFCHs;

[0363] N Tx,PSFCH The RB set corresponding to the PSFCH;

[0364] N Tx,PSFCH Comb information corresponding to each PSFCH;

[0365] The transmit power of a PSFCH;

[0366] N Tx,PSFCH The number of PRBs contained in the comb teeth corresponding to each PSFCH in the PSFCH;

[0367] N Tx,PSFCH The number of reference PRBs contained in the comb teeth corresponding to each PSFCH in the PSFCHs.

[0368] Parameters or factors that may be considered when determining the transmit power of the first PRB are described in detail below.

[0369] Factor 1: Single PSFCH transmit power

[0370] In some implementations, the transmit power of a single PSFCH may be determined based on one or more of the following:

[0371] The number of reference PRBs included in one comb

[0372] Parameters for power control based on downlink path loss;

[0373] Downlink path loss PL;

[0374] The parameter μ is determined based on the subcarrier spacing.

[0375] In some implementations, the number of reference PRBs included in one comb tooth may be determined based on pre-configuration information and / or configuration information of the network device, for example.

[0376] In some implementations, the parameter for power control based on downlink path loss may include a P0 value for power control based on downlink path loss. O,PSFCH Indicates. O,PSFCH It can be determined based on the parameter dl-P0-PSFCH configured by the higher layer.

[0377] In some implementations, the parameter for power control based on downlink path loss may include an α value for power control based on downlink path loss. PSFCH Indicates. PSFCH It can also be called the downlink path loss compensation factor. PSFCHIt can be determined by the parameter dl-Alpha-PSFCH configured by the higher layer. If the higher layer does not configure this parameter, then α PSFCH The value of can be 1.

[0378] In some implementations, the downlink path loss PL may be determined based on measurements of the terminal device.

[0379] In some implementations, the value of the parameter μ determined based on the subcarrier spacing may be determined based on the subcarrier spacing. The correspondence between μ and the subcarrier spacing can be seen in Table 1 above.

[0380] Exemplarily, the transmit power of a single PSFCH may be determined based on (or satisfy) the following formula:

[0381] Factor 2: N selected by the terminal device Tx,PSFCH The number of PSFCHs

[0382] In the time domain symbol corresponding to the PSFCH transmission opportunity or PSFCH transmission resource, there are multiple PSFCHs to be sent, and the terminal device needs to select N from them. Tx,PSFCH PSFCH is sent. In this embodiment of the application, the terminal device selects N Tx,PSFCH The method of selecting PSFCH is not specifically limited. For example, in some implementations, the terminal device may select N based on one or more of the following: Tx,PSFCH PSFCH:

[0383] Transmit power of a single PSFCH;

[0384] a first maximum transmit power;

[0385] The number of PSFCHs to be sent by the terminal device;

[0386] The priority corresponding to PSFCH;

[0387] The number of reference PRBs contained in one comb tooth.

[0388] The first maximum transmit power may be determined based on a configured maximum output power. The configured maximum output power may be determined based on pre-configured information and / or configuration information of the network device. For example, the configured maximum output power may be determined based on a high-level parameter sl-maxTxPower. For example, the first maximum transmit power may be determined using P CMAX Indicates that the unit is dBm.

[0389] The following gives the terminal device selection N Tx,PSFCH A more specific example of a PSFCH.

[0390] For example, the terminal device can determine the transmit power of a PSFCH based on the number of reference PRBs contained in a comb tooth, and select N Tx,PSFCH For PSFCH transmission k in PSFCH transmission opportunity i, 1≤k≤N Tx,PSFCH , PSFCH can be selected based on the following method.

[0391] First, if the terminal device is configured with the parameter dl-P0-PSFCH, the transmit power of a single PSFCH is determined based on the following formula:

[0392] In determining P PSFCH,one After that, we can make judgments based on different situations, and determine the N Tx,PSFCH May be different.

[0393] Case 1: If N sch,Tx,PSFCH ≤N max,PSFCH

[0394] ③Case 1-1: If P is satisfied PSFCH,one +10log 10 (N sch,Tx,PSFCH )≤P CMAX

[0395] In case 1-1, N Tx,PSFCH =N sch,Tx,PSFCH ;P PSFCH,k (i) = P PSFCH,one [dBm].

[0396] ③ Case 1-2: If P is satisfied PSFCH,one +10log 10 (N sch,Tx,PSFCH )>P CMAX

[0397] In case 1-2, the terminal device autonomously determines N in the order of increasing priority value. Tx,PSFCH PSFCHs (i.e., the priority value of the selected PSFCH is less than or equal to the priority value of the unselected PSFCH). In the process of selecting PSFCH, the terminal device first selects the PSFCH carrying HARQ-ACK information, and then selects the PSFCH carrying conflict information. Tx,PSFCH PSFCHs satisfy: For PSFCH carrying HARQ-ACK information, M i (1≤i≤8) represents the number of PSFCHs corresponding to the priority value i; for PSFCHs carrying conflicting information, M i(i>8) indicates the number of PSFCHs corresponding to the priority value (i-8); K is the maximum value that satisfies the following formula: Otherwise K=0.

[0398] In case 1-2, P PSFCH,k (i) = min(P CMAX -10log 10 (N Tx,PSFCH ),P PSFCH,one )[dBm].

[0399] Case 2: If N sch,Tx,PSFCH >N max,PSFCH

[0400] In case 2, the terminal device autonomously determines N in the order of increasing priority values. max,PSFCH PSFCH.

[0401] ③Case 2-1: If P is satisfied PSFCH,one +10log 10 (N max,PSFCH )≤P CMAX

[0402] In case 2-1, N Tx,PSFCH =N max,PSFCH ;P PSFCH,k (i) = P PSFCH,one [dBm].

[0403] ③Case 2-2: If P is satisfied PSFCH,one +10log 10 (N max,PSFCH )>P CMAX

[0404] In case 2-2, the terminal device autonomously determines N in the order of increasing priority values. Tx,PSFCH PSFCHs (i.e., the priority value of the selected PSFCH is less than or equal to the priority value of the unselected PSFCH). In the process of selecting PSFCH, the terminal device first selects the PSFCH carrying HARQ-ACK information, and then selects the PSFCH carrying conflict information. Tx,PSFCH PSFCHs satisfy: For PSFCH carrying HARQ-ACK information, M i (1≤i≤8) represents the number of PSFCHs corresponding to the priority value i; for PSFCHs carrying conflicting information, M i (i>8) indicates the number of PSFCHs corresponding to the priority value (i-8); K is the maximum value that satisfies the following formula: Otherwise K=0.

[0405] In case 2-2, P PSFCH,k (i) = min(P CMAX -10log 10 (N Tx,PSFCH ),P PSFCH,one )[dBm].

[0406] The above description is the case where the terminal device is configured with the parameter dl-P0-PSFCH. If the terminal device is not configured with the parameter dl-P0-PSFCH, the terminal device will autonomously select N in the order of increasing priority values. Tx,PSFCH (N Tx,PSFCH ≥1) PSFCH, each PSFCH transmit power is P PSFCH,k (i) = P CMAX -10log 10 (N Tx,PSFCH )[dBm].

[0407] Factor 3: Transmit power of a PSFCH

[0408] The embodiments of the present application do not specifically limit the manner in which the terminal device determines the transmit power of a PSFCH. For example, in some implementations, the terminal device may determine the transmit power of a PSFCH based on one or more of the following:

[0409] N Tx,PSFCH PSFCH;

[0410] Transmit power of a single PSFCH;

[0411] a first maximum transmit power;

[0412] The number of PSFCHs to be sent by the terminal device is recorded as N sch,Tx,PSFCH ;

[0413] The priority corresponding to PSFCH;

[0414] The number of reference PRBs contained in one comb tooth.

[0415] The first maximum transmit power may be determined based on the configured maximum output power. The configured maximum output power may be determined based on pre-configured information and / or configuration information of the network device. For example, the configured maximum output power may be determined based on a high-level parameter sl-maxTxPower. For example, the first maximum transmit power may be determined using P CMAX Indicates that the unit is dBm.

[0416] A more specific example of how the terminal device determines the transmit power of a PSFCH is given below.

[0417] For example, the terminal device can determine the transmit power of a PSFCH based on the number of reference PRBs contained in a comb tooth, and select N Tx,PSFCH For PSFCH transmission k in PSFCH transmission opportunity i, 1≤k≤N Tx,PSFCH , PSFCH can be selected based on the following method and the transmission power P of a PSFCH can be determined PSFCH,k (i).

[0418] First, if the terminal device is configured with the parameter dl-P0-PSFCH, the transmit power of a single PSFCH is determined based on the following formula:

[0419] In determining P PSFCH,one After that, we can make judgments based on different situations, and determine the N Tx,PSFCH May be different.

[0420] Case 1: If N sch,Tx,PSFCH ≤N max,PSFCH

[0421] ③Case 1-1: If P is satisfied PSFCH,one +10log 10 (N sch,Tx,PSFCH )≤P CMAX

[0422] In case 1-1, N Tx,PSFCH =N sch,Tx,PSFCH ;P PSFCH,k (i) = P PSFCH,one [dBm].

[0423] ③ Case 1-2: If P is satisfied PSFCH,one +10log 10 (N sch,Tx,PSFCH )>P CMAX

[0424] In case 1-2, the terminal device autonomously determines N in the order of increasing priority value. Tx,PSFCH PSFCHs (i.e., the priority value of the selected PSFCH is less than or equal to the priority value of the unselected PSFCH). In the process of selecting PSFCH, the terminal device first selects the PSFCH carrying HARQ-ACK information, and then selects the PSFCH carrying conflict information. Tx,PSFCH PSFCHs satisfy: For PSFCH carrying HARQ-ACK information, M i (1≤i≤8) represents the number of PSFCHs corresponding to the priority value i; for PSFCHs carrying conflicting information, M i(i>8) indicates the number of PSFCHs corresponding to the priority value (i-8); K is the maximum value that satisfies the following formula: Otherwise K=0.

[0425] In case 1-2, P PSFCH,k (i) = min(P CMAX -10log 10 (N Tx,PSFCH ),P PSFCH,one )[dBm].

[0426] Case 2: If N sch,Tx,PSFCH >N max,PSFCH

[0427] In case 2, the terminal device autonomously determines N in the order of increasing priority values. max,PSFCH PSFCH.

[0428] ③Case 2-1: If P is satisfied PSFCH,one +10log 10 (N max,PSFCH )≤P CMAX

[0429] In case 2-1, N Tx,PSFCH =N max,PSFCH ;P PSFCH,k (i) = P PSFCH,one [dBm].

[0430] ③Case 2-2: If P is satisfied PSFCH,one +10log 10 (N max,PSFCH )>P CMAX

[0431] In case 2-2, the terminal device autonomously determines N in the order of increasing priority values. Tx,PSFCH PSFCHs (i.e., the priority value of the selected PSFCH is less than or equal to the priority value of the unselected PSFCH). In the process of selecting PSFCH, the terminal device first selects the PSFCH carrying HARQ-ACK information, and then selects the PSFCH carrying conflict information. Tx,PSFCH PSFCHs satisfy: For PSFCH carrying HARQ-ACK information, M i (1≤i≤8) represents the number of PSFCHs corresponding to the priority value i; for PSFCHs carrying conflicting information, M i (i>8) indicates the number of PSFCHs corresponding to the priority value (i-8); K is the maximum value that satisfies the following formula: Otherwise K=0.

[0432] In case 2-2, P PSFCH,k (i) = min(P CMAX -10log 10 (N Tx,PSFCH ),P PSFCH,one )[dBm].

[0433] The above description is the case where the terminal device is configured with the parameter dl-P0-PSFCH. If the terminal device is not configured with the parameter dl-P0-PSFCH, the terminal device will autonomously select N in the order of increasing priority values. Tx,PSFCH (N Tx,PSFCH ≥1) PSFCH, each PSFCH transmit power is P PSFCH,k (i) = P CMAX -10log 10 (N Tx,PSFCH )[dBm].

[0434] It should be noted that the N selected by the terminal device Tx,PSFCH The transmission power P of each PSFCH PSFCH,k (i) are equal, that is, the transmission power of a PSFCH is P PSFCH,k (i).

[0435] Factor 4: N Tx,PSFCH RB set corresponding to PSFCH

[0436] For example, the resource pool includes 4 RB sets, and the RB set indexes corresponding to the 4 RB sets are 0, 1, 2, and 3 respectively. In a PSFCH transmission opportunity, the terminal device selects N Tx,PSFCH The PSFCHs are located in three of the four RB sets, and the RB set indices corresponding to the three RB sets are 0, 1, and 2 respectively. In this case, N Tx,PSFCH The RB sets corresponding to the PSFCHs are RB set 0, RB set 1 and RB set 2.

[0437] Factor 5: N Tx,PSFCH Comb information corresponding to each PSFCH

[0438] For an RB set, different comb teeth may correspond to different numbers of PRBs. For example, comb tooth 0 in the RB set includes 10 PRBs, while comb tooth 1 includes 11 PRBs. Therefore, the number of PRBs can be selected based on the number of PRBs. Tx,PSFCH The comb information corresponding to each PSFCH determines the transmission power of one PRB of the PSFCH.

[0439] The above describes in detail the factors that may be considered when determining the transmit power of the first PRB. The following provides several possible ways to determine the transmit power of the first PRB.

[0440] Method a:

[0441] The transmit power of the first PRB may be determined based on (or satisfy) the following formula:

[0442] or,

[0443] or,

[0444] Among them, P one Indicates the transmit power of a PSFCH, based on P in the above factor 3 PSFCH,k (i) Determine, for example, P one P PSFCH,k (i) (expressed in dBm) corresponding to the power value; K2 j Indicates N Tx,PSFCH The number of PRBs contained in the transmission resource of the jth PSFCH in the PSFCHs, j is a positive integer, and 1≤j≤N Tx,PSFCH For example, if a PSFCH transmission resource includes comb tooth b in RB set a, the number of PRBs included in the PSFCH transmission resource is the number of PRBs included in comb tooth b in RB set a. Indicates the number of reference PRBs included in one comb tooth. min() indicates the minimum value operation, and max() indicates the maximum value operation.

[0445] Method b:

[0446] The transmit power of the first PRB may be determined based on (or satisfy) the following formula:

[0447] or,

[0448] or,

[0449] Among them, P one_dB is the transmit power of a PSFCH expressed in decibels, P one_dB Based on the P in the above factor three PSFCH,k (i) Determine, if P one_dB =P PSFCH,k (i), K2 j Indicates N Tx,PSFCH The number of PRBs contained in the transmission resource of the jth PSFCH in the PSFCHs, j is a positive integer, and 1≤j≤NTx，PSFCH For example, if a PSFCH transmission resource includes comb tooth b in RB set a, the number of PRBs included in the PSFCH transmission resource is the number of PRBs included in comb tooth b in RB set a. Indicates the number of reference PRBs included in one comb tooth. min() indicates the minimum value operation, and max() indicates the maximum value operation.

[0450] It should be noted that in formulas (27) to (32), Indicates N Tx,PSFCH The number of non-overlapping PRBs in the frequency domain corresponding to the transmission resources of the PSFCHs. At this time, it is assumed that the PRBs corresponding to the frequency domain resources of each PSFCH are different. If the PRBs corresponding to the frequency domain resources of each PSFCH may be the same, then the PRBs in the above formula need to be Replaced with K6, the value of K6 is based on N Tx,PSFCH The number of non-overlapping PRBs in the frequency domain corresponding to the transmission resources of the PSFCH is determined. For example, K6 is equal to N Tx,PSFCH The number of PRBs in the frequency domain that do not overlap with the transmission resources of the PSFCHs.

[0451] To facilitate understanding, the following describes in more detail the method for determining the transmit power of the PSFCH in the second structure, using specific examples. It should be noted that the following examples are intended solely to help those skilled in the art understand the embodiments of the present application, and are not intended to limit the embodiments of the present application to the specific numerical values ​​or specific scenarios illustrated. Those skilled in the art will readily appreciate that various equivalent modifications or variations can be made based on the examples provided below, and such modifications or variations fall within the scope of the embodiments of the present application.

[0452] The SL-U system supports PSFCH power control based on downlink path loss, but does not support power control based on sidelink path loss. In the SL-U system, the terminal device can send multiple PSFCHs in one symbol. The maximum number of PSFCHs sent simultaneously by the terminal device does not exceed the maximum number of PSFCHs to be sent, N. max,PSFCH The value of this parameter is related to the capability of the terminal device. For a certain transmission opportunity, the number of PSFCHs to be sent by the terminal device is N sch,Tx,PSFCH The N sch,Tx,PSFCH The PSFCHs may include a PSFCH for carrying HARQ-ACK information of a PSSCH and / or a PSFCH for carrying contention information.

[0453] Step 1: Select N on the terminal device Tx,PSFCH PSFCH.

[0454] In step 1, the terminal device can determine the transmit power of a PSFCH based on the number of reference PRBs included in a comb tooth, and select N Tx,PSFCH For PSFCH transmission k in PSFCH transmission opportunity i, 1≤k≤N Tx,PSFCH , PSFCH can be selected based on the following method, and the transmission power P of a PSFCH can be determined PSFCH,k (i).

[0455] First, if the terminal device is configured with the parameter dl-P0-PSFCH, the transmit power of a single PSFCH is determined based on the following formula:

[0456] In the above formula, P O,PSFCH Indicates the P0 value for power control based on downlink path loss. O,PSFCH Determined based on the parameter dl-P0-PSFCH. PSFCH Represents the downlink path loss compensation factor. α PSFCH Determined based on the parameter dl-Alpha-PSFCH. If the higher layer does not configure α PSFCH , then α PSFCH The corresponding value can be 1. PL represents the downlink path loss. Indicates the number of reference PRBs included in one comb tooth. μ is determined based on the sidecarrier spacing. The relationship between μ and subcarrier spacing can be seen in Table 1 above.

[0457] Case 1: If N sch,Tx,PSFCH ≤N max,PSFCH

[0458] ③Case 1-1: If P is satisfied PSFCH,one +10log 10 (N sch,Tx,PSFCH )≤P CMAX

[0459] In case 1-1, N Tx,PSFCH =N sch,Tx,PSFCH ;P PSFCH,k (i) = P PSFCH,one [dBm].

[0460] ③ Case 1-2: If P is satisfied PSFCH,one +10log 10 (N sch,Tx,PSFCH )>P CMAX

[0461] In case 1-2, the terminal device autonomously determines N in the order of increasing priority value. Tx,PSFCHPSFCHs (i.e., the priority value of the selected PSFCH is less than or equal to the priority value of the unselected PSFCH). In the process of selecting PSFCH, the terminal device first selects the PSFCH carrying HARQ-ACK information, and then selects the PSFCH carrying conflict information. Tx,PSFCH PSFCHs satisfy: For PSFCH carrying HARQ-ACK information, M i (1≤i≤8) represents the number of PSFCHs corresponding to the priority value i; for PSFCHs carrying conflicting information, M i (i>8) indicates the number of PSFCHs corresponding to the priority value (i-8); K is the maximum value that satisfies the following formula: Otherwise K=0.

[0462] In case 1-2, P PSFCH,k (i) = min(P CMAX -10log 10 (N Tx,PSFCH ),P PSFCH,one )[dBm].

[0463] Case 2: If N sch,Tx,PSFCH >N max,PSFCH

[0464] In case 2, the terminal device autonomously determines N in the order of increasing priority values. max,PSFCH PSFCH.

[0465] ③Case 2-1: If P is satisfied PSFCH,one +10log 10 (N max,PSFCH )≤P CMAX

[0466] In case 2-1, N Tx,PSFCH =N max,PSFCH ;P PSFCH,k (i) = P PSFCH,one [dBm].

[0467] ③Case 2-2: If P is satisfied PSFCH,one +10log 10 (N max,PSFCH )>P CMAX

[0468] In case 2-2, the terminal device autonomously determines N in the order of increasing priority values. Tx,PSFCHPSFCHs (i.e., the priority value of the selected PSFCH is less than or equal to the priority value of the unselected PSFCH). In the process of selecting PSFCH, the terminal device first selects the PSFCH carrying HARQ-ACK information, and then selects the PSFCH carrying conflict information. Tx,PSFCH PSFCHs satisfy: For PSFCH carrying HARQ-ACK information, M i (1≤i≤8) represents the number of PSFCHs corresponding to the priority value i; for PSFCHs carrying conflicting information, M i (i>8) indicates the number of PSFCHs corresponding to the priority value (i-8); K is the maximum value that satisfies the following formula: Otherwise K=0.

[0469] In case 2-2, P PSFCH,k (i) = min(P CMAX -10log 10 (N Tx,PSFCH ),P PSFCH,one )[dBm].

[0470] The above description is the case where the terminal device is configured with the parameter dl-P0-PSFCH. If the terminal device is not configured with the parameter dl-P0-PSFCH, the terminal device will autonomously select N in the order of increasing priority values. Tx,PSFCH (N Tx,PSFCH ≥1) PSFCH, each PSFCH transmit power is P PSFCH,k (i) = P CMAX -10log 10 (N Tx,PSFCH )[dBm].

[0471] Step 1 above determines the PSFCH power based on the number of reference PRBs included in a comb tooth within an RB set. However, for an RB set, different comb teeth may correspond to different numbers of PRBs. For example, comb tooth 0 in an RB set may include 10 PRBs, while comb tooth 1 may include 11 PRBs. Therefore, it is necessary to proceed to step 2 below to determine the transmission power of the selected PRBs in the PSFCH.

[0472] Step 2: Determine the transmit power on one PRB used to transmit the PSFCH.

[0473] The transmit power on a PRB may be determined, for example, using the aforementioned method a or method b. A detailed description may be found in the aforementioned text and will not be repeated here.

[0474] In the first or second embodiment, it is assumed that the terminal device selects NTx,PSFCH PSFCH corresponds to L1 RB set, the terminal device can first perform the channel access process or perform the LBT process on the L1 RB set. Then, the terminal device can send N Tx,PSFCH The PSFCH corresponding to the P1 RB set in the PSFCH; wherein the P1 RB set is the RB set in the L1 RB set for which the channel access process is successful or the channel sensing result is idle, L1 and P1 are both integers, and P1 is less than or equal to L1. Tx,PSFCH The PSFCH corresponding to the P1 RB set in the PSFCHs can be understood as Tx,PSFCH If the transmission resource of one of the PSFCHs is located in the P1 RB set, then the PSFCH is the PSFCH corresponding to the P1 RB set.

[0475] In the first or second embodiment, the terminal device may perform a channel access process or an LBT process on an L2 RB set, and the L2 RB set and the PSFCH to be sent (the number of PSFCH to be sent may be N sch,Tx,PSFCH ) corresponds. Then, the terminal device can determine N from the PSFCH corresponding to the P2 RB set. Tx,PSFCH PSFCHs. The P2 RB set is the set of RBs in the L2 RB set for which the channel access process succeeds or the channel sensing result indicates that the RBs are idle. L2 and P2 are both integers, and P2 is less than or equal to L2. The PSFCH corresponding to the P2 RB set can be understood as follows: for a PSFCH, if its transmission resources are located in the P2 RB set, then the PSFCH is the PSFCH corresponding to the P2 RB set.

[0476] The method embodiment of the present application is described in detail above in conjunction with Figures 1 to 13. The device embodiment of the present application is described in detail below in conjunction with Figures 14 and 15. It should be understood that the description of the method embodiment corresponds to the description of the device embodiment. Therefore, for parts not described in detail, reference can be made to the above method embodiment.

[0477] FIG14 is a schematic diagram of the structure of a terminal device provided in an embodiment of the present application. The terminal device 1400 in FIG14 may include a determination module 1410. The determination module 1410 is configured to determine the transmit power of a first PSFCH. The first PSFCH is a PSFCH based on a comb-tooth structure.

[0478] In some implementations, the frequency domain resources of the first PSFCH include common comb teeth and dedicated PRBs in an RB set.

[0479] In some implementations, the transmit power of the first PSFCH is determined based on the number of dedicated PRBs contained in a PSFCH.

[0480] In some implementations, the transmit power of the first PSFCH is determined based on the transmit power of a single PSFCH, and the transmit power of the single PSFCH is determined based on the number of dedicated PRBs included in the one PSFCH.

[0481] In some implementations, the transmit power of the single PSFCH is further determined based on one or more of the following:

[0482] Parameters for power control based on downlink path loss;

[0483] Downlink loss;

[0484] Parameters determined based on the subcarrier spacing.

[0485] In some implementations, the transmit power of the single PSFCH satisfies: PSFCH,one =P O,PSFCH +10log 10 (2 μ ·K3)+α PSFCH PL;

[0486] Among them, P PSFCH,one Represents the transmit power of the single PSFCH, P O,PSFCH represents the P0 value for power control based on downlink path loss, K3 is determined based on the number of dedicated PRBs contained in the PSFCH, PL is determined based on the downlink path loss, α PSFCH represents the α value for power control based on the downlink path loss, and μ represents the parameter determined based on the subcarrier spacing.

[0487] In some implementations, the transmit power of the first PSFCH includes the transmit power of a first PRB used to transmit the first PSFCH.

[0488] In some implementations, the transmit power of the first PRB is determined based on one or more of the following:

[0489] The transmit power of the single PSFCH;

[0490] N selected by the terminal device Tx,PSFCH The number of PSFCHs;

[0491] The transmit power of a PSFCH;

[0492] The number of dedicated PRBs contained in a PSFCH;

[0493] The NTx,PSFCH The number of PRBs in the common comb corresponding to each PSFCH;

[0494] The correlation between the transmit power on a PRB in a common comb and the transmit power on a dedicated PRB;

[0495] The minimum transmit power on a PRB.

[0496] In some implementations, the association relationship includes one of the following:

[0497] The difference between the transmit power on a PRB in a common comb and the transmit power on a dedicated PRB;

[0498] The ratio of the transmit power on a PRB in the common comb to the transmit power on a dedicated PRB.

[0499] In some implementations, the association relationship is determined based on pre-configuration information and / or configuration information of the network device.

[0500] In some implementations, the pre-configuration information and / or the configuration information of the network device includes first indication information, and the first indication information is used to indicate the association relationship.

[0501] In some implementations, the N Tx,PSFCH The number of PRBs in the common comb corresponding to each PSFCH is determined based on one or more of the following:

[0502] The N Tx,PSFCH The number of RB sets corresponding to each PSFCH;

[0503] The N Tx,PSFCH The RB set corresponding to the PSFCH;

[0504] Index information of public combs;

[0505] The number of PRBs contained in the common comb in an RB set;

[0506] The number of reference PRBs contained in a comb tooth in an RB set.

[0507] In some implementations, the index information of the public comb is determined based on pre-configuration information and / or configuration information of the network device.

[0508] In some implementations, the number of PRBs included in the common comb in the one RB set is determined based on pre-configuration information and / or configuration information of the network device.

[0509] In some implementations, the number of reference PRBs included in a comb tooth in the RB set is determined based on one or more of the following information:

[0510] Preconfiguration information;

[0511] Configuration information of network devices;

[0512] Index information corresponding to the RB set;

[0513] Index information corresponding to the common comb teeth in the RB set;

[0514] Configuration information of inter-cell guard bands.

[0515] In some implementations, the N Tx，PSFCH The number of PRBs in the common comb corresponding to each PSFCH satisfies:

[0516] Wherein, K1 represents the N Tx,PSFCH The number of PRBs in the common comb corresponding to the PSFCH, A represents the number of PRBs in the PSFCH Tx,PSFCH The number of RB sets corresponding to PSFCHs, RBset_a represents the N Tx,PSFCH The ath RB set among the A RB sets corresponding to the PSFCH, K4 RBset_a represents the number of PRBs included in the common comb teeth in the a-th RB set, where a is a positive integer and 1≤a≤A.

[0517] In some implementations, the N Tx，PSFCH The number of PRBs in the common comb corresponding to each PSFCH satisfies:

[0518] Wherein, K1 represents the N Tx,PSFCH The number of PRBs in the common comb corresponding to the PSFCH, A represents the number of PRBs in the PSFCH Tx,PSFCH The number of RB sets corresponding to PSFCHs, Indicates the number of reference PRBs contained in a comb tooth in an RB set.

[0519] In some implementations, the first PRB is a PRB in a common comb, and the transmit power of the first PRB satisfies:

[0520] Among them, P common represents the transmit power of the first PRB, P one represents the transmit power of the PSFCH, K1 represents the N Tx,PSFCHK represents the number of PRBs in the common comb teeth corresponding to the PSFCH, K3 represents the number of dedicated PRBs contained in a PSFCH, and k is determined based on the ratio of the transmit power on a PRB in the common comb teeth to the transmit power on a dedicated PRB.

[0521] In some implementations, the first PRB is a PRB in a common comb, and the transmit power of the first PRB satisfies:

[0522] Among them, P common represents the transmit power of the first PRB, P one represents the transmit power of the PSFCH, K1 represents the N Tx,PSFCH K represents the number of PRBs in the common comb teeth corresponding to the PSFCH, K3 represents the number of dedicated PRBs contained in a PSFCH, and k is determined based on the difference between the transmit power on a PRB in the common comb teeth and the transmit power on a dedicated PRB.

[0523] In some implementations, the first PRB is a dedicated PRB, and the transmit power of the first PRB satisfies:

[0524] Among them, P dedicated represents the transmit power of the first PRB, P one represents the transmit power of the PSFCH, K1 represents the N Tx,PSFCH K represents the number of PRBs in the common comb teeth corresponding to the PSFCHs, K3 represents the number of dedicated PRBs contained in a PSFCH, and k is determined based on the ratio of the transmit power on one PRB in the common comb teeth to the transmit power on one dedicated PRB.

[0525] In some implementations, the first PRB is a dedicated PRB, and the transmit power of the first PRB satisfies:

[0526] Among them, P dedicated represents the transmit power of the first PRB, P one represents the transmit power of the PSFCH, K1 represents the N Tx,PSFCH K represents the number of PRBs in the common comb teeth corresponding to the PSFCH, K3 represents the number of dedicated PRBs contained in a PSFCH, and k is determined based on the difference between the transmit power on a PRB in the common comb teeth and the transmit power on a dedicated PRB.

[0527] In some implementations, the first PRB is a PRB in a first common comb in an RB set, the transmit power of the first PRB is the sum of the transmit powers of the target PSFCH, and the target PSFCH is a PSFCH whose transmission resources include the first common comb.

[0528] In some implementations, the terminal device selects the N based on one or more of the following: Tx,PSFCH PSFCH:

[0529] The transmit power of the single PSFCH;

[0530] a first maximum transmit power;

[0531] The number of PSFCHs to be sent by the terminal device;

[0532] The priority corresponding to PSFCH;

[0533] The number of dedicated PRBs contained in a PSFCH transmission resource;

[0534] The first maximum transmit power is determined based on the configured maximum output power.

[0535] In some implementations, the terminal device determines the transmit power of the one PSFCH based on one or more of the following:

[0536] The N Tx,PSFCH PSFCH;

[0537] The transmit power of the single PSFCH;

[0538] a first maximum transmit power;

[0539] The number of PSFCHs to be sent by the terminal device;

[0540] The priority corresponding to PSFCH;

[0541] The number of dedicated PRBs contained in a PSFCH transmission resource;

[0542] The first maximum transmit power is determined based on the configured maximum output power.

[0543] In some implementations, the frequency domain resources of the first PSFCH include the PRB corresponding to the first comb tooth in the first RB set.

[0544] In some implementations, the transmit power of the first PSFCH is determined based on the number of reference PRBs included in one comb tooth.

[0545] In some implementations, the number of reference PRBs included in one comb tooth is determined based on pre-configuration information and / or configuration information of the network device.

[0546] In some implementations, the transmit power of the first PSFCH is determined based on the transmit power of a single PSFCH, and the transmit power of the single PSFCH is determined based on the number of reference PRBs included in one comb tooth.

[0547] In some implementations, the transmit power of the single PSFCH is further determined based on one or more of the following:

[0548] Parameters for power control based on downlink path loss;

[0549] Downlink loss;

[0550] Parameters determined based on the subcarrier spacing.

[0551] In some implementations, the transmit power of the single PSFCH satisfies:

[0552] Among them, P PSFCH,one Represents the transmit power of the single PSFCH, P O,PSFCH Indicates the P0 value for power control based on downlink path loss. represents the number of reference PRBs included in one comb tooth, PL is determined based on the downlink path loss, α PSFCH represents the α value for power control based on the downlink path loss, and μ represents the parameter determined based on the subcarrier spacing.

[0553] In some implementations, the transmit power of the first PSFCH includes the transmit power of a first PRB used to transmit the first PSFCH.

[0554] In some implementations, the transmit power of the first PRB is determined based on one or more of the following:

[0555] The transmit power of the single PSFCH;

[0556] N selected by the terminal device Tx,PSFCH The number of PSFCHs;

[0557] The N Tx,PSFCH The RB set corresponding to the PSFCH;

[0558] The N Tx,PSFCH Comb information corresponding to each PSFCH;

[0559] The transmit power of a PSFCH;

[0560] The NTx,PSFCH The number of PRBs contained in the comb teeth corresponding to each PSFCH in the PSFCH;

[0561] The N Tx,PSFCH The number of reference PRBs contained in the comb teeth corresponding to each PSFCH in the PSFCHs.

[0562] In some implementations, the transmit power of the first PRB satisfies:

[0563] Among them, P one Indicates the transmit power of the PSFCH, K2 j Indicates the N Tx,PSFCH The number of PRBs contained in the transmission resource of the jth PSFCH in the PSFCHs, j is a positive integer, and 1≤j≤N Tx,PSFCH .

[0564] In some implementations, the terminal device selects the N based on one or more of the following: Tx,PSFCH PSFCH:

[0565] The transmit power of the single PSFCH;

[0566] a first maximum transmit power;

[0567] The number of PSFCHs to be sent by the terminal device;

[0568] The priority corresponding to PSFCH;

[0569] The number of reference PRBs contained in one comb tooth;

[0570] The first maximum transmit power is determined based on the configured maximum output power.

[0571] In some implementations, the terminal device determines the transmit power of a PSFCH based on one or more of the following:

[0572] The N Tx,PSFCH PSFCH;

[0573] The transmit power of the single PSFCH;

[0574] a first maximum transmit power;

[0575] The number of PSFCHs to be sent by the terminal device;

[0576] The priority corresponding to PSFCH;

[0577] The number of reference PRBs contained in one comb tooth;

[0578] The first maximum transmit power is determined based on the configured maximum output power.

[0579] In some implementations, the first PSFCH is N selected by the terminal device. Tx,PSFCH One PSFCH among the PSFCHs, the N Tx,PSFCH PSFCH corresponds to L1 RB set,

[0580] The terminal device 1400 further includes:

[0581] A communication module is configured to perform a channel access process on the L1 RB set; send the N Tx,PSFCH The PSFCH corresponding to the P1 RB set among the PSFCHs;

[0582] The P1 RB set is an RB set in the L1 RB set whose channel access process is successful or whose channel sensing result is idle, L1 and P1 are both integers, and P1 is less than or equal to L1.

[0583] In some implementations, the first PSFCH is N selected by the terminal device. Tx,PSFCH One PSFCH among PSFCHs,

[0584] The terminal device 1400 further includes:

[0585] A processing module is configured to perform a channel access process on L2 RB sets, wherein the L2 RB sets correspond to the PSFCH to be transmitted; and determine the N from the PSFCH corresponding to the P2 RB sets. Tx,PSFCH PSFCH, the P2 RB set is the RB set in the L2 RB set for which the channel access process is successful or the channel sensing result is idle;

[0586] Wherein, L2 and P2 are both integers, and P2 is less than or equal to L2.

[0587] FIG15 is a schematic diagram of the structure of an apparatus according to an embodiment of the present application. The dotted lines in FIG15 indicate that the unit or module is optional. Apparatus 1500 may be used to implement the method described in the above method embodiment. Apparatus 1500 may be a chip or a terminal device.

[0588] The device 1500 may include one or more processors 1510. The processor 1510 may support the device 1500 to implement the method described in the method embodiment above. The processor 1510 may be a general-purpose processor or a special-purpose processor. For example, the processor may be a central processing unit (CPU). Alternatively, the processor may be another general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc. The general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

[0589] The apparatus 1500 may further include one or more memories 1520. The memories 1520 store programs that can be executed by the processor 1510, causing the processor 1510 to perform the methods described in the above method embodiments. The memories 1520 may be independent of the processor 1510 or integrated into the processor 1510.

[0590] The apparatus 1500 may further include a transceiver 1530. The processor 1510 may communicate with other devices or chips via the transceiver 1530. For example, the processor 1510 may transmit and receive data with other devices or chips via the transceiver 1530.

[0591] The present application also provides a computer-readable storage medium for storing a program. The computer-readable storage medium can be applied to a terminal device provided in the present application, and the program enables a computer to execute the method performed by the terminal device in each embodiment of the present application.

[0592] The present application also provides a computer program product. The computer program product includes a program. The computer program product can be applied to the terminal device provided in the present application, and the program causes a computer to execute the method performed by the terminal device in each embodiment of the present application.

[0593] The embodiments of the present application also provide a computer program. The computer program can be applied to the terminal device provided in the embodiments of the present application, and the computer program enables a computer to execute the method executed by the terminal device in each embodiment of the present application.

[0594] It should be understood that the terms "system" and "network" in this application can be used interchangeably. In addition, the terms used in this application are only used to explain the specific embodiments of this application and are not intended to limit this application. The terms "first", "second", "third", and "fourth" in the specification and claims of this application and the accompanying drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0595] In the embodiments of this application, the term "indication" may refer to a direct indication, an indirect indication, or an indication of an association. For example, "A indicates B" may refer to a direct indication of B, e.g., B can obtain information through A; it may refer to an indirect indication of B, e.g., A indicates C, e.g., B can obtain information through C; or it may refer to an association between A and B.

[0596] In the embodiment of the present application, "B corresponding to A" means that B is associated with A and B can be determined based on A. However, it should be understood that determining B based on A does not mean determining B based solely on A, but B can also be determined based on A and / or other information.

[0597] In the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship between indication and indication, configuration and configuration, etc.

[0598] In the embodiments of the present application, "pre-definition" or "pre-configuration" may be implemented by pre-storing corresponding codes, tables, or other methods that can be used to indicate relevant information in a device (e.g., a terminal device and a network device). The present application does not limit the specific implementation method. For example, pre-definition may refer to information defined in a protocol.

[0599] In the embodiments of the present application, the “protocol” may refer to a standard protocol in the communications field, for example, it may include an LTE protocol, an NR protocol, and related protocols used in future communication systems, and the present application does not limit this.

[0600] In the embodiments of this application, the term "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0601] In various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0602] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0603] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0604] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0605] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be read by a computer or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital versatile disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0606] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A method for determining transmission power, characterized in that: include: The terminal device determines the transmission power of the first physical side feedback channel PSFCH, where the first PSFCH is a PSFCH based on a comb-tooth structure.

2. The method according to claim 1, characterized in that: The frequency domain resources of the first PSFCH include common comb teeth and dedicated physical resource blocks PRB in a resource block RB set.

3. The method according to claim 2, characterized in that The transmission power of the first PSFCH is determined based on the number of dedicated PRBs included in one PSFCH.

4. The method according to claim 3, characterized in that: The transmission power of the first PSFCH is determined based on the transmission power of the single PSFCH, and the transmission power of the single PSFCH is determined based on the number of dedicated PRBs included in the one PSFCH.

5. The method according to claim 4, characterized in that The transmit power of the single PSFCH is also determined based on one or more of the following: Parameters for power control based on downlink path loss; Downlink loss; Parameter determined based on the subcarrier spacing.

6. The method according to claim 5, characterized in that The transmission power of the single PSFCH satisfies: PSFCH,one =P O,PSFCH +10log 10 (2 μ ·K3)+α PSFCH PL; Among them, P PSFCH,one represents the transmission power of the single PSFCH, P O,PSFCH represents the P0 value for power control based on the downlink path loss, K3 is determined based on the number of dedicated PRBs contained in the PSFCH, PL is determined based on the downlink path loss, α PSFCH represents the α value for power control based on the downlink path loss, and μ represents the parameter determined based on the subcarrier spacing.

7. The method according to any one of claims 2 to 6, characterized in that The transmission power of the first PSFCH includes the transmission power of the first PRB used to transmit the first PSFCH.

8. The method according to claim 7, characterized in that The transmit power of the first PRB is determined based on one or more of the following: The transmit power of the single PSFCH; The terminal device selects N Tx,PSFCH The number of PSFCHs; The transmit power of a PSFCH; The number of dedicated PRBs contained in a PSFCH; The N Tx,PSFCH The number of PRBs in the common comb corresponding to each PSFCH; The correlation between the transmit power on a PRB in a common comb and the transmit power on a dedicated PRB; The minimum transmit power on a PRB.

9. The method according to claim 8, characterized in that The association relationship includes one of the following: The difference between the transmit power on a PRB in a common comb and the transmit power on a dedicated PRB; The ratio of the transmit power on one PRB in the common comb to the transmit power on one dedicated PRB.

10. The method according to claim 8 or 9, characterized in that: The association relationship is determined based on pre-configuration information and / or configuration information of the network device.

11. The method according to claim 10, characterized in that The pre-configuration information and / or the configuration information of the network device includes first indication information, and the first indication information is used to indicate the association relationship.

12. The method according to any one of claims 8 to 11, characterized in that The N Tx,PSFCH The number of PRBs in the common comb corresponding to each PSFCH is determined based on one or more of the following: The N Tx,PSFCH The number of RB sets corresponding to each PSFCH; The N Tx,PSFCH The RB set corresponding to the PSFCH; Index information of public combs; The number of PRBs contained in the common comb in an RB set; The number of reference PRBs contained in a comb tooth in an RB set.

13. The method according to claim 12, characterized in that The index information of the public comb teeth is determined based on pre-configuration information and / or configuration information of the network device.

14. The method according to claim 12 or 13, characterized in that The number of PRBs included in the common comb teeth in the one RB set is determined based on pre-configuration information and / or configuration information of the network device.

15. The method according to any one of claims 12 to 14, characterized in that The number of reference PRBs contained in one comb tooth in one RB set is determined based on one or more of the following information: Pre-configuration information; Configuration information of network devices; Index information corresponding to the one RB set; Index information corresponding to the common comb teeth in the one RB set; Configuration information of inter-cell guard band.

16. The method according to any one of claims 12 to 15, characterized in that The N Tx,PSFCH The number of PRBs in the common comb corresponding to each PSFCH satisfies: Wherein, K1 represents the N Tx,PSFCH The number of PRBs in the common comb corresponding to the PSFCH, A represents the ... Tx,PSFCH The number of RB sets corresponding to the PSFCH, RBset_a represents the N Tx,PSFCH The ath RB set among the A RB sets corresponding to the PSFCH, K4 RBset_a represents the number of PRBs included in the common comb teeth in the a-th RB set, where a is a positive integer and 1≤a≤A.

17. The method according to any one of claims 12 to 15, characterized in that The N Tx,PSFCH The number of PRBs in the common comb corresponding to each PSFCH satisfies: Wherein, K1 represents the N Tx,PSFCH The number of PRBs in the common comb corresponding to the PSFCH, A represents the ... Tx,PSFCH The number of RB sets corresponding to each PSFCH, Indicates the number of reference PRBs contained in a comb tooth in an RB set.

18. The method according to any one of claims 8 to 17, characterized in that The first PRB is a PRB in a common comb tooth, and the transmission power of the first PRB satisfies: Among them, P common represents the transmit power of the first PRB, P one represents the transmission power of the PSFCH, K1 represents the N Tx,PSFCH K represents the number of PRBs in the common comb teeth corresponding to a PSFCH, K3 represents the number of dedicated PRBs contained in a PSFCH, and k is determined based on the ratio of the transmit power on a PRB in the common comb teeth to the transmit power on a dedicated PRB.

19. The method according to any one of claims 8 to 17, characterized in that The first PRB is a PRB in a common comb tooth, and the transmission power of the first PRB satisfies: Among them, P common represents the transmit power of the first PRB, P one represents the transmission power of the PSFCH, K1 represents the N Tx,PSFCH K represents the number of PRBs in the common comb teeth corresponding to the PSFCH, K3 represents the number of dedicated PRBs contained in a PSFCH, and k is determined based on the difference between the transmit power on a PRB in the common comb teeth and the transmit power on a dedicated PRB.

20. The method according to any one of claims 8 to 17, characterized in that The first PRB is a dedicated PRB, and the transmission power of the first PRB satisfies: Among them, P dedicated represents the transmit power of the first PRB, P one represents the transmission power of the PSFCH, K1 represents the N Tx,PSFCH K represents the number of PRBs in the common comb teeth corresponding to a PSFCH, K3 represents the number of dedicated PRBs contained in a PSFCH, and k is determined based on the ratio of the transmit power on a PRB in the common comb teeth to the transmit power on a dedicated PRB.

21. The method according to any one of claims 8 to 17, characterized in that The first PRB is a dedicated PRB, and the transmission power of the first PRB satisfies: Among them, P dedicated represents the transmit power of the first PRB, P one represents the transmission power of the PSFCH, K1 represents the N Tx,PSFCH K represents the number of PRBs in the common comb teeth corresponding to the PSFCH, K3 represents the number of dedicated PRBs contained in a PSFCH, and k is determined based on the difference between the transmit power on a PRB in the common comb teeth and the transmit power on a dedicated PRB.

22. The method according to any one of claims 8 to 17, characterized in that The first PRB is a PRB in a first common comb tooth in an RB set, the transmission power of the first PRB is the sum of the transmission powers of the target PSFCH, and the target PSFCH is a PSFCH whose transmission resources include the first common comb teeth.

23. The method according to any one of claims 8 to 22, characterized in that The terminal device selects the N based on one or more of the following Tx,PSFCH PSFCH: The transmit power of the single PSFCH; a first maximum transmit power; The number of PSFCHs to be sent by the terminal device; The priority corresponding to PSFCH; The number of dedicated PRBs contained in a PSFCH transmission resource; The first maximum transmit power is determined based on the configured maximum output power.

24. The method according to any one of claims 8 to 23, characterized in that The terminal device determines the transmit power of the one PSFCH based on one or more of the following: The N Tx,PSFCH PSFCH; The transmit power of the single PSFCH; a first maximum transmit power; The number of PSFCHs to be sent by the terminal device; The priority corresponding to PSFCH; The number of dedicated PRBs contained in a PSFCH transmission resource; The first maximum transmit power is determined based on the configured maximum output power.

25. The method according to claim 1, characterized in that The frequency domain resources of the first PSFCH include the PRB corresponding to the first comb tooth in the first RB set.

26. The method according to claim 25, characterized in that The transmission power of the first PSFCH is determined based on the number of reference PRBs included in one comb tooth.

27. The method according to claim 26, characterized in that The number of reference PRBs included in one comb tooth is determined based on pre-configuration information and / or configuration information of the network device.

28. The method according to claim 26 or 27, characterized in that The transmission power of the first PSFCH is determined based on the transmission power of the single PSFCH, and the transmission power of the single PSFCH is determined based on the number of reference PRBs included in one comb tooth.

29. The method according to claim 28, characterized in that The transmit power of the single PSFCH is also determined based on one or more of the following: Parameters for power control based on downlink path loss; Downlink loss; Parameter determined based on the subcarrier spacing.

30. The method according to claim 29, characterized in that The transmission power of the single PSFCH satisfies: Among them, P PSFCH,one represents the transmission power of the single PSFCH, P O,PSFCH Indicates the P0 value for power control based on downlink path loss, represents the number of reference PRBs included in the comb tooth, PL is determined based on the downlink path loss, α PSFCH represents the α value for power control based on the downlink path loss, and μ represents the parameter determined based on the subcarrier spacing.

31. The method according to any one of claims 25 to 30, characterized in that The transmission power of the first PSFCH includes the transmission power of the first PRB used to transmit the first PSFCH.

32. The method according to claim 31, characterized in that The transmit power of the first PRB is determined based on one or more of the following: The transmit power of the single PSFCH; The terminal device selects N Tx,PSFCH The number of PSFCHs; The N Tx,PSFCH The RB set corresponding to the PSFCH; The N Tx,PSFCH Comb information corresponding to each PSFCH; The transmit power of a PSFCH; The N Tx,PSFCH The number of PRBs contained in the comb teeth corresponding to each PSFCH in the PSFCH; The N Tx,PSFCH The number of reference PRBs contained in the comb teeth corresponding to each PSFCH in the PSFCHs.

33. The method according to claim 32, characterized in that The transmission power of the first PRB satisfies: Among them, P one represents the transmission power of the PSFCH, K2 j Indicates the N Tx,PSFCH The number of PRBs contained in the transmission resource of the jth PSFCH in the PSFCHs, j is a positive integer, and 1≤j≤N Tx,PSFCH .

34. The method according to claim 32 or 33, characterized in that The terminal device selects the N based on one or more of the following Tx,PSFCH PSFCH: The transmit power of the single PSFCH; a first maximum transmit power; The number of PSFCHs to be sent by the terminal device; The priority corresponding to PSFCH; The number of reference PRBs contained in one comb tooth; The first maximum transmit power is determined based on the configured maximum output power.

35. The method according to any one of claims 32 to 34, characterized in that The terminal device determines the transmit power of a PSFCH based on one or more of the following: The N Tx,PSFCH PSFCH; The transmit power of the single PSFCH; a first maximum transmit power; The number of PSFCHs to be sent by the terminal device; The priority corresponding to PSFCH; The number of reference PRBs contained in one comb tooth; The first maximum transmit power is determined based on the configured maximum output power.

36. The method according to any one of claims 1 to 35, characterized in that The first PSFCH is N selected by the terminal device Tx,PSFCH One PSFCH among the PSFCHs, the N Tx,PSFCH Each PSFCH corresponds to a set of L1 RBs. The method further comprises: The terminal device performs a channel access process on the L1 RB set; The terminal device sends the N Tx,PSFCH The PSFCH corresponding to the P1 RB set among the PSFCHs; The P1 RB set is a RB set in the L1 RB set whose channel access process is successful or whose channel sensing result is idle, L1 and P1 are both integers, and P1 is less than or equal to L1.

37. The method according to any one of claims 1 to 35, characterized in that The first PSFCH is N selected by the terminal device Tx,PSFCH One PSFCH among PSFCHs, The method further comprises: The terminal device performs a channel access process on L2 RB sets, where the L2 RB sets correspond to the PSFCH to be sent; The terminal device determines the N from the PSFCH corresponding to the P2 RB set. Tx,PSFCH PSFCH, the P2 RB set is the RB set in the L2 RB set for which the channel access process is successful or the channel sensing result is idle; Wherein, L2 and P2 are both integers, and P2 is less than or equal to L2.

38. A terminal device, characterized in that: include: The determination module is used to determine the transmission power of the first physical side feedback channel PSFCH, where the first PSFCH is a PSFCH based on a comb-tooth structure.

39. The terminal device according to claim 38, characterized in that: The frequency domain resources of the first PSFCH include common comb teeth and dedicated physical resource blocks PRB in a resource block RB set.

40. The terminal device according to claim 39, characterized in that: The transmission power of the first PSFCH is determined based on the number of dedicated PRBs included in one PSFCH.

41. The terminal device according to claim 40, characterized in that: The transmission power of the first PSFCH is determined based on the transmission power of the single PSFCH, and the transmission power of the single PSFCH is determined based on the number of dedicated PRBs included in the one PSFCH.

42. The terminal device according to claim 41, characterized in that: The transmit power of the single PSFCH is also determined based on one or more of the following: Parameters for power control based on downlink path loss; Downlink loss; Parameter determined based on the subcarrier spacing.

43. The terminal device according to claim 42, characterized in that: The transmission power of the single PSFCH satisfies: PSFCH,one =P O,PSFCH +10log 10 (2 μ ·K3)+α PSFCH PL; Among them, P PSFCH,one represents the transmission power of the single PSFCH, P O,PSFCH represents the P0 value for power control based on the downlink path loss, K3 is determined based on the number of dedicated PRBs contained in the PSFCH, PL is determined based on the downlink path loss, α PSFCH represents the α value for power control based on the downlink path loss, and μ represents the parameter determined based on the subcarrier spacing.

44. The terminal device according to any one of claims 39 to 43, characterized in that: The transmission power of the first PSFCH includes the transmission power of the first PRB used to transmit the first PSFCH.

45. The terminal device according to claim 44, characterized in that: The transmit power of the first PRB is determined based on one or more of the following: The transmit power of the single PSFCH; The terminal device selects N Tx,PSFCH The number of PSFCHs; The transmit power of a PSFCH; The number of dedicated PRBs contained in a PSFCH; The N Tx,PSFCH The number of PRBs in the common comb corresponding to each PSFCH; The correlation between the transmit power on a PRB in a common comb and the transmit power on a dedicated PRB; The minimum transmit power on a PRB.

46. ​​The terminal device according to claim 45, characterized in that: The association relationship includes one of the following: The difference between the transmit power on a PRB in a common comb and the transmit power on a dedicated PRB; The ratio of the transmit power on one PRB in the common comb to the transmit power on one dedicated PRB.

47. The terminal device according to claim 45 or 46, characterized in that: The association relationship is determined based on pre-configuration information and / or configuration information of the network device.

48. The terminal device according to claim 47, characterized in that: The pre-configuration information and / or the configuration information of the network device includes first indication information, and the first indication information is used to indicate the association relationship.

49. The terminal device according to any one of claims 45 to 48, characterized in that: The N Tx,PSFCH The number of PRBs in the common comb corresponding to each PSFCH is determined based on one or more of the following: The N Tx,PSFCH The number of RB sets corresponding to each PSFCH; The N Tx,PSFCH The RB set corresponding to the PSFCH; Index information of public combs; The number of PRBs contained in the common comb in an RB set; The number of reference PRBs contained in a comb tooth in an RB set.

50. The terminal device according to claim 49, characterized in that: The index information of the public comb teeth is determined based on pre-configuration information and / or configuration information of the network device.

51. The terminal device according to claim 49 or 50, characterized in that: The number of PRBs included in the common comb teeth in the one RB set is determined based on pre-configuration information and / or configuration information of the network device.

52. The terminal device according to any one of claims 49 to 51, characterized in that: The number of reference PRBs contained in one comb tooth in one RB set is determined based on one or more of the following information: Pre-configuration information; Configuration information of network devices; Index information corresponding to the one RB set; Index information corresponding to the common comb teeth in the one RB set; Configuration information of inter-cell guard band.

53. The terminal device according to any one of claims 49 to 52, characterized in that: The N Tx,PSFCH The number of PRBs in the common comb corresponding to each PSFCH satisfies: Wherein, K1 represents the N Tx,PSFCH The number of PRBs in the common comb corresponding to the PSFCH, A represents the ... Tx,PSFCH The number of RB sets corresponding to the PSFCH, RBset_a represents the N Tx,PSFCH The ath RB set among the A RB sets corresponding to the PSFCH, K4R Bset_a represents the number of PRBs included in the common comb teeth in the a-th RB set, where a is a positive integer and 1≤a≤A.

54. The terminal device according to any one of claims 49 to 52, characterized in that: The N Tx,PSFCH The number of PRBs in the common comb corresponding to each PSFCH satisfies: Wherein, K1 represents the N Tx,PSFCH The number of PRBs in the common comb corresponding to the PSFCH, A represents the ... Tx,PSFCH The number of RB sets corresponding to each PSFCH, Indicates the number of reference PRBs contained in a comb tooth in an RB set.

55. The terminal device according to any one of claims 45 to 54, characterized in that: The first PRB is a PRB in a common comb tooth, and the transmission power of the first PRB satisfies: Among them, P common represents the transmit power of the first PRB, P one represents the transmission power of the PSFCH, K1 represents the N Tx,PSFCH K represents the number of PRBs in the common comb teeth corresponding to a PSFCH, K3 represents the number of dedicated PRBs contained in a PSFCH, and k is determined based on the ratio of the transmit power on a PRB in the common comb teeth to the transmit power on a dedicated PRB.

56. The terminal device according to any one of claims 45 to 54, characterized in that: The first PRB is a PRB in a common comb tooth, and the transmission power of the first PRB satisfies: Among them, P common represents the transmit power of the first PRB, P one represents the transmission power of the PSFCH, K1 represents the N Tx,PSFCH K represents the number of PRBs in the common comb teeth corresponding to the PSFCH, K3 represents the number of dedicated PRBs contained in a PSFCH, and k is determined based on the difference between the transmit power on a PRB in the common comb teeth and the transmit power on a dedicated PRB.

57. The terminal device according to any one of claims 45 to 54, characterized in that: The first PRB is a dedicated PRB, and the transmission power of the first PRB satisfies: Among them, P dedicated represents the transmit power of the first PRB, P one represents the transmission power of the PSFCH, K1 represents the N Tx,PSFCH K represents the number of PRBs in the common comb teeth corresponding to a PSFCH, K3 represents the number of dedicated PRBs contained in a PSFCH, and k is determined based on the ratio of the transmit power on a PRB in the common comb teeth to the transmit power on a dedicated PRB.

58. The terminal device according to any one of claims 45 to 54, characterized in that: The first PRB is a dedicated PRB, and the transmission power of the first PRB satisfies: Among them, P dedicated represents the transmit power of the first PRB, P one represents the transmission power of the PSFCH, K1 represents the N Tx,PSFCH K represents the number of PRBs in the common comb teeth corresponding to the PSFCH, K3 represents the number of dedicated PRBs contained in a PSFCH, and k is determined based on the difference between the transmit power on a PRB in the common comb teeth and the transmit power on a dedicated PRB.

59. The terminal device according to any one of claims 45 to 54, characterized in that: The first PRB is a PRB in a first common comb tooth in an RB set, the transmission power of the first PRB is the sum of the transmission powers of the target PSFCH, and the target PSFCH is a PSFCH whose transmission resources include the first common comb teeth.

60. The terminal device according to any one of claims 45 to 59, characterized in that: The terminal device selects the N based on one or more of the following Tx,PSFCH PSFCH: The transmit power of the single PSFCH; a first maximum transmit power; The number of PSFCHs to be sent by the terminal device; The priority corresponding to PSFCH; The number of dedicated PRBs contained in a PSFCH transmission resource; The first maximum transmit power is determined based on the configured maximum output power.

61. The terminal device according to any one of claims 45 to 60, characterized in that: The terminal device determines the transmit power of the one PSFCH based on one or more of the following: The N Tx,PSFCH PSFCH; The transmit power of the single PSFCH; a first maximum transmit power; The number of PSFCHs to be sent by the terminal device; The priority corresponding to PSFCH; The number of dedicated PRBs contained in a PSFCH transmission resource; The first maximum transmit power is determined based on the configured maximum output power.

62. The terminal device according to claim 38, characterized in that: The frequency domain resources of the first PSFCH include the PRB corresponding to the first comb tooth in the first RB set.

63. The terminal device according to claim 62, characterized in that: The transmission power of the first PSFCH is determined based on the number of reference PRBs included in one comb tooth.

64. The terminal device according to claim 63, characterized in that: The number of reference PRBs included in one comb tooth is determined based on pre-configuration information and / or configuration information of the network device.

65. The terminal device according to claim 63 or 64, characterized in that: The transmission power of the first PSFCH is determined based on the transmission power of the single PSFCH, and the transmission power of the single PSFCH is determined based on the number of reference PRBs included in one comb tooth.

66. The terminal device according to claim 65, characterized in that: The transmit power of the single PSFCH is also determined based on one or more of the following: Parameters for power control based on downlink path loss; Downlink loss; Parameter determined based on the subcarrier spacing.

67. The terminal device according to claim 66, characterized in that: The transmission power of the single PSFCH satisfies: Among them, P PSFCH，one represents the transmission power of the single PSFCH, P O，PSFCH Indicates the P0 value for power control based on downlink path loss, represents the number of reference PRBs included in the comb tooth, PL is determined based on the downlink path loss, α PSFCH represents the α value for power control based on the downlink path loss, and μ represents the parameter determined based on the subcarrier spacing.

68. The terminal device according to any one of claims 62 to 67, characterized in that: The transmission power of the first PSFCH includes the transmission power of the first PRB used to transmit the first PSFCH.

69. The terminal device according to claim 68, characterized in that: The transmit power of the first PRB is determined based on one or more of the following: The transmit power of the single PSFCH; The terminal device selects N Tx,PSFCH The number of PSFCHs; The N Tx,PSFCH The RB set corresponding to the PSFCH; The N Tx,PSFCH Comb information corresponding to each PSFCH; The transmit power of a PSFCH; The N Tx,PSFCH The number of PRBs contained in the comb teeth corresponding to each PSFCH in the PSFCH; The N Tx,PSFCH The number of reference PRBs contained in the comb teeth corresponding to each PSFCH in the PSFCHs.

70. The terminal device according to claim 69, characterized in that: The transmission power of the first PRB satisfies: Among them, P one represents the transmission power of the PSFCH, K2 j Indicates the N Tx,PSFCH The number of PRBs contained in the transmission resource of the jth PSFCH in the PSFCHs, j is a positive integer, and 1≤j≤N Tx,PSFCH .

71. The terminal device according to claim 69 or 70, characterized in that: The terminal device selects the N based on one or more of the following Tx,PSFCH PSFCH: The transmit power of the single PSFCH; a first maximum transmit power; The number of PSFCHs to be sent by the terminal device; The priority corresponding to PSFCH; The number of reference PRBs contained in one comb tooth; The first maximum transmit power is determined based on the configured maximum output power.

72. The terminal device according to any one of claims 69 to 71, characterized in that: The terminal device determines the transmit power of a PSFCH based on one or more of the following: The N Tx,PSFCH PSFCH; The transmit power of the single PSFCH; a first maximum transmit power; The number of PSFCHs to be sent by the terminal device; The priority corresponding to PSFCH; The number of reference PRBs contained in one comb tooth; The first maximum transmit power is determined based on the configured maximum output power.

73. The terminal device according to any one of claims 38 to 72, characterized in that: The first PSFCH is N selected by the terminal device Tx,PSFCH One PSFCH among the PSFCHs, the N Tx,PSFCH Each PSFCH corresponds to a set of L1 RBs. The terminal device further includes: A communication module is used to perform a channel access process on the L1 RB set; send the N Tx,PSFCH The PSFCH corresponding to the P1 RB set among the PSFCHs; The P1 RB set is a RB set in the L1 RB set whose channel access process is successful or whose channel sensing result is idle, L1 and P1 are both integers, and P1 is less than or equal to L1.

74. The terminal device according to any one of claims 38 to 72, characterized in that: The first PSFCH is N selected by the terminal device Tx,PSFCH One PSFCH among PSFCHs, The terminal device further includes: A processing module is used to perform a channel access process on L2 RB sets, where the L2 RB sets correspond to the PSFCH to be sent; and determine the N from the PSFCH corresponding to the P2 RB sets. Tx,PSFCH PSFCH, the P2 RB set is the RB set in the L2 RB set for which the channel access process is successful or the channel sensing result is idle; Wherein, L2 and P2 are both integers, and P2 is less than or equal to L2.

75. A terminal device, characterized in that: It includes a transceiver, a memory and a processor, wherein the memory is used to store programs, and the processor is used to call the programs in the memory and control the transceiver to receive or send signals so that the terminal device executes the method as described in any one of claims 1-37.

76. A device, characterized in that The device comprises a processor, configured to call a program from a memory so as to cause the device to execute a method as claimed in any one of claims 1 to 37.

77. A chip, characterized in that: It comprises a processor, which is used to call a program from a memory so that a device equipped with the chip executes a method as described in any one of claims 1 to 37.

78. A computer-readable storage medium, characterized in that A program is stored thereon, the program causing a computer to execute the method according to any one of claims 1 to 37.

79. A computer program product, characterized in that The method comprises a program which causes a computer to execute the method according to any one of claims 1 to 37.

80. A computer program, characterized in that The computer program causes a computer to execute the method according to any one of claims 1 to 37.

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