Sidelink communication method and terminal device

Abstract

Provided are a sidelink communication method and a terminal device. The method comprises: if a first condition is satisfied, a terminal device adjusting transmission power of a sidelink transmission, wherein the first condition comprises one or more of the following: one or more sidelink transmissions of the terminal device on a first carrier overlapping in the time domain with one or more sidelink transmissions of the terminal device on a second carrier; and the sum of transmission powers of a plurality of sidelink transmissions in a time-domain overlapping portion of the first carrier and the second carrier being greater than a first transmission power. On the basis of the present application, during multi-carrier sidelink communication, a terminal device can perform power control on the basis of the first condition, so as to avoid problems such as abnormal transmission power of multiple carriers in a sidelink transmission process, thereby avoiding abnormalities in multi-carrier sidelink communication.

Description

Method and terminal device for sideline communication Technical Field

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

[0002] The sidelink system can support the use of multiple carriers for sidelink transmission, thereby increasing the system transmission rate or improving transmission reliability. When performing sidelink transmission, the terminal device can select a carrier. For example, the terminal device can determine the carrier corresponding to the data to be transmitted based on the correspondence between the service type and the carrier configured by the high-level layer. In the sidelink multi-carrier technology, the technologies that the terminal device can support may include: one or more of: carrier aggregation (carrier aggregation) and packet duplication (packet duplication). How to implement power control in the sidelink multi-carrier technology is an urgent problem to be solved.

[0003] Summary of the Invention

[0004] The present application provides a method and terminal device for sideline communication. The following introduces various aspects of the present application.

[0005] In a first aspect, a method for sideline communication is provided, the method comprising: if a first condition is met, the terminal device adjusts the transmission power of the sideline transmission; wherein the first condition comprises one or more of the following: one or more sideline transmissions of the terminal device on the first carrier overlap with one or more sideline transmissions of the terminal device on the second carrier in the time domain; and the sum of the transmission powers of the multiple sideline transmissions of the time domain overlapping portion of the first carrier and the second carrier is greater than the first transmission power.

[0006] According to a second aspect, a terminal device is provided, comprising: an adjustment unit for adjusting the transmission power of the side transmission if a first condition is met; wherein the first condition comprises one or more of the following: one or more side transmissions of the terminal device on the first carrier overlap with one or more side transmissions of the terminal device on the second carrier in the time domain; and the sum of the transmission powers of the multiple side transmissions of the time domain overlapping part of the first carrier and the second carrier is greater than the first transmission power.

[0007] In a third aspect, a terminal device is provided, comprising a processor and a memory, wherein the memory is used to store one or more computer programs, and the processor is used to call the computer program in the memory so that the terminal device executes part or all of the steps in the method of the first aspect.

[0008] In a fourth aspect, an embodiment of the present application provides a communication system, which includes the above-mentioned terminal device. In another possible design, the system may also include other devices that interact with the terminal device in the solution provided in the embodiment of the present application.

[0009] In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program, and the computer program enables a terminal device to execute part or all of the steps in the methods of the above aspects.

[0010] In a sixth aspect, embodiments of the present application provide a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, wherein the computer program is operable to cause a terminal device to perform some or all of the steps of the methods described in each of the above aspects. In some implementations, the computer program product may be a software installation package.

[0011] In the seventh aspect, an embodiment of the present application provides a chip, which includes a memory and a processor. The processor can call and run a computer program from the memory to implement some or all of the steps described in the methods of the above aspects.

[0012] Based on the present application, during the multi-carrier side communication process, the terminal device can perform power control based on the first condition, thereby avoiding problems such as abnormal transmission power of multiple carriers during side transmission, and further avoiding abnormalities in multi-carrier side communication. 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 a schematic flowchart of a method for sideline communication provided in an embodiment of the present application.

[0024] FIG11 is an example diagram of a scenario applicable to an embodiment of the present application.

[0025] FIG12 is an example diagram of another scenario applicable to the embodiment of the present application.

[0026] FIG13 is an example diagram of another scenario applicable to the embodiment of the present application.

[0027] FIG14 is an example diagram of another scenario applicable to the embodiment of the present application.

[0028] FIG15 is an example diagram of another scenario applicable to the embodiment of the present application.

[0029] FIG16 is an example diagram of another scenario applicable to the embodiment of the present application.

[0030] FIG17 is a schematic structural diagram of a terminal device provided in an embodiment of the present application.

[0031] FIG18 is a schematic structural diagram of a device for communication provided in an embodiment of the present application. DETAILED DESCRIPTION

[0032] The technical solution in this application will be described below with reference to the accompanying drawings.

[0033] Communication system architecture

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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 includes a CU and a DU. The gNB may also include an AAU.

[0042] 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.

[0043] Sideline communication under different network coverage conditions

[0044] Sidelink communication refers to a communication technology based on a sidelink (SL, also known as a direct link). Sidelink communication can be, for example, device-to-device (D2D) or vehicle-to-everything (V2X) communication. In traditional cellular systems, communication data is received or sent between terminal devices and network devices, while sidelink communication supports direct communication data transmission between terminal devices. Compared with traditional cellular communications, direct communication data transmission between terminal devices can have higher spectrum efficiency and lower transmission latency. For example, the vehicle networking system adopts sidelink communication technology.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] Sideline communication based on central control node

[0050] 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.

[0051] Sideline communication mode

[0052] Some standards or protocols (such as the 3rd Generation Partnership Project (3GPP)) define two sideline communication modes: a first mode and a second mode.

[0053] 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.

[0054] 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.

[0055] Data transmission method of side communication

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] Time slot structure for sideline communication

[0061] A communication system may define a frame, subframe, or time slot structure for sidelink communication. Some sidelink communication systems define multiple time slot structures. For example, the NR-based sidelink communication system (NR SL) defines two time slot structures. One of the two time slot structures does not include a physical sidelink feedback channel (PSFCH), as shown in FIG9A ; the other of the two time slot structures includes a PSFCH, as shown in FIG9B .

[0062] The physical sidelink control channel (PSCCH) in the NR SL 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, 12 15, 20, 25}.

[0063] To reduce the complexity of blind detection of PSCCH by terminal devices, usually only one number of symbols and PRBs is configured for PSCCH in a resource pool. In addition, since NR SL uses sub-channel 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 in the resource pool.

[0064] Referring to Figure 9A, for a time slot structure that does not include PSFCH, the PSSCH in the NR SL 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 as 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 P consecutive PRBs (the values ​​of K and P can be predefined by protocol, or preconfigured, or configured by network equipment, or depend on the implementation of the terminal device).

[0065] 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. This time slot structure differs primarily from FIG9A in 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. Typically, the third-to-last symbol serves as the AGC symbol, 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 typically used for AGC adjustment, and the data on this symbol is the same as the data on the second symbol in the time slot. The PSCCH occupies three symbols, and the remaining symbols can be used for PSSCH transmission.

[0066] Sidelink power control

[0067] 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 on downlink path loss only; if the upper 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.

[0068] 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 open-loop power control based on the downlink path loss is supported.

[0069] PSSCH / PSCCH power control

[0070] The transmit power of the PSSCH on a symbol including only the PSSCH can be determined as follows:

[0071] If the terminal device operates in the second mode (or Mode 2) mentioned above, when the upper layer is configured with congestion control, the PSSCH transmit power satisfies the following formula: PSSC H=min(P CMAX ,P MAX_CBR ,min(P PSSCH,D ,P PSSCH,SL )) [dBm];

[0072] Otherwise, the PSSCH transmit power satisfies the following formula P PSSCH =min(P CMAX ,min(P PSSCH,D ,P PSSCH,SL )) [dBm]

[0073] In the above formula, P CMAX Indicates the configured maximum transmit power, P MAX_CBR It represents the maximum sidelink transmit power determined by transmission priority and channel busy ratio (CBR) level under congestion control configured by the higher layer. PSSCH,D and P PSSCH,SL They represent the transmission power determined based on the downlink path loss and the transmission power determined based on the sidelink path loss, respectively.

[0074] P PSSCH,D and P PSSCH,SL Determined by the following formulas:

[0075] In the above formula, P 0,D / P0,SL They represent the basic operating points of the transmit power based on downlink / sidelink path loss power control configured by the higher layer. D / α SL Indicates the downlink / sidelink path loss compensation factor configured by the upper layer. If the upper layer does not configure α D / α SL , then α D / α SL The value of can be 1. PL D / PL SL Indicates the downlink / sidelink path loss estimated by the terminal device. Indicates the number of PRBs occupied by PSSCH on symbols that do not carry PSCCH.

[0076] It should be noted that if the upper layer only configures P 0,D Without configuring P 0, SL, it means that power control is performed based on downlink path loss only. In this case, min(P PSSCH,D ,P PSSCH,SL )=P PSSCH,D If the upper layer only configures P 0,SL Without configuring P 0,D , it means that power control is performed based only on the sidelink path loss. In this case, min(P PSSCH,D ,P PSSCH,SL )=P PSSCH,SL If the upper layer configures P 0,SL and P 0,D , it means that power control is performed based on both downlink path loss and sidelink path loss.

[0077] For symbols including both PSCCH and PSSCH, the terminal device can set the total transmission power P PSSCH The PRBs are allocated to PSCCH and PSSCH respectively according to the ratio of their PRB numbers.

[0078] For example, the transmission power P of PSSCH PSSCH2 satisfy:

[0079] In the above formula, Indicates the number of PRBs occupied by PSCCH.

[0080] Accordingly, the transmit power of PSCCH satisfies:

[0081] PSFCH transmit power

[0082] The NR SL system supports power control of PSFCH based on downlink path loss, but does not support power control of PSFCH based on sidelink path loss. The NR SL system supports the terminal device to send multiple PSFCHs in one 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 transmitted based on the number of PSCCHs / PSSCHs required for sideline feedback received in multiple PSSCH time slots corresponding to the PSFCH time slot. 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.

[0083] 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 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 PSCFH,one .

[0084] P PSFCH,one It can be determined using the following formula:

[0085] P PSFCH,one =P O_PSFCH +10log 10 (2 u )+α PSFCH ·PL D [dBm].

[0086] In the above formula, P O_PSFCH Indicates the basic operating point of the PSFCH transmit power based on downlink path loss power control configured by the higher layer. PSFCH Indicates the downlink path loss compensation factor for PSFCH power control configured by the higher layer signaling. If the higher layer does not configure α PSFCH , then α PSFCHThe value of can be 1. PL D Indicates the downlink path loss estimated by the terminal device.

[0087] S-SSB transmit power

[0088] S-SSB can include three signals: sidelink secondary synchronizaiton signal (S-SSS), sidelink primary synchronizaiton signal (S-PSS) and physical sidelink broadcast channel (PSBCH). The transmit power on the time domain symbols corresponding to the three signals is usually consistent to avoid AGC problems. S-SSB can be power-controlled based on downlink path loss. When S-SSB is power-controlled based on downlink path loss, the transmit power of the S-SSB satisfies the following formula:

[0089] In the above formula, P CMAX Indicates the configured maximum transmit power, P 0,S-SSB Indicates the basic operating point of the transmit power for power control based on downlink path loss configured by the higher layer. S-SSB Indicates the downlink path loss compensation factor configured by the higher layer signaling. If the higher layer does not configure α S-SSB , then α S-SSB The value of can be 1. PL D Indicates the downlink path loss estimated by the terminal device. Indicates the number of PRBs occupied by S-SSBs. The value of is usually 11. If the upper layer does not configure the parameter P 0,S-SSB Or the terminal device is located outside the cell coverage, then the terminal device can transmit at the maximum power P CMAX Send S-SSB.

[0090] Sidelink systems can support the use of multiple carriers for sidelink transmission, thereby increasing system transmission rates or improving transmission reliability. When performing sidelink transmission, the terminal device can select a carrier. For example, the terminal device can determine the carrier corresponding to the data to be transmitted based on the correspondence between service types and carriers configured by higher layers. In sidelink multi-carrier technology, the technologies that the terminal device can support may include one or more of carrier aggregation and packet repetition. How to implement power control in sidelink multi-carrier technology is a technical issue that needs to be solved urgently.

[0091] Figure 10 is a schematic flow chart of a method for sideline communication provided by an embodiment of the present application. The method shown in Figure 10 can be implemented by a terminal device. The method shown in Figure 10 can include step S1010.

[0092] Step S1010: If the first condition is met, the terminal device adjusts the transmission power of the side transmission.

[0093] The first condition in step S1010 is related to the first carrier and the second carrier. Therefore, the first carrier and the second carrier are described below.

[0094] The terminal device can use a first carrier and a second carrier for multi-carrier sidelink transmission. The second carrier may include one or more carriers. If the second carrier includes a single carrier, the terminal device can use the first carrier and another carrier different from the first carrier for two-carrier sidelink transmission. If the second carrier includes multiple carriers, the terminal device can use the first carrier and multiple carriers for multi-carrier sidelink transmission with more than two carriers.

[0095] The configurations of the first carrier and the second carrier may be the same or different. The configurations may include, for example, one or more of the following: sub-carrier spacing (SCS) and time slot structure.

[0096] Regarding subcarrier spacing, in some communication systems (such as NR SL systems), one carrier only supports one sideband bandwidth part (BWP). The subcarrier spacing can be configured through BWP. Therefore, one carrier only supports one subcarrier spacing size. When the sideband system supports multi-carrier transmission, different carriers can correspond to the same or different subcarrier spacing sizes. The subcarrier spacing sizes may include: 15kHz, 30kHz, 60kHz or 120kHz, etc. For example, the subcarrier spacing of the first carrier may be 15kHz, and the subcarrier spacing of one carrier in the second carrier may be 30kHz.

[0097] For the time slot structure, each carrier can configure PSSCH transmission resources and / or PSFCH transmission resources through a resource pool, so that the time slot structures corresponding to different carriers are different. For example, the time slot structure corresponding to the first carrier can be as shown in Figure 9A, and the time slot structure corresponding to the second carrier can be as shown in Figure 9B.

[0098] It should be noted that, when the second carrier includes multiple carriers, the different configurations of the first carrier and the second carrier may include: the configurations of some or all of the carriers in the first carrier and the second carrier are different. Among them, if the carriers in the second carrier that are configured differently from the first carrier are multiple carriers, the configurations of the multiple carriers in the second carrier that are configured differently from the first carrier may be the same or different. For example, the subcarrier spacing of some of the carriers in the first carrier and the second carrier is the same, and the subcarrier spacing of another part of the carriers in the first carrier and the second carrier is different. Alternatively, the subcarrier spacing of all carriers in the first carrier and the second carrier is different.

[0099] The following illustrates the first and second carriers using Figure 11. Figure 11 illustrates six carriers. Carrier 0 and carrier 1 each correspond to a 15 kHz subcarrier spacing, while carriers 2, 3, 4, and 5 each correspond to a 30 kHz subcarrier spacing. Figure 11 shows one time slot for carrier 0 and carrier 1, the duration of which corresponds to the duration of two time slots for carrier 2, carrier 3, carrier 4, or carrier 5.

[0100] In Figure 11, the first carrier may be any one of the six carriers, and the second carrier may include some or all of the five carriers other than the first carrier. For example, the first carrier may be carrier 0. The second carrier may be any one of carriers 1 to 5; or the second carrier may include any two of carriers 1 to 5; or the second carrier may include any three of carriers 1 to 5; or the second carrier may include any four of carriers 1 to 5; or the second carrier may include all of carriers 1 to 5.

[0101] Continuing with Figure 11 as an example, when the first carrier includes carrier 0 and the second carrier includes carrier 1 and carrier 2, although the subcarrier spacing of carrier 0 and carrier 1 is the same, the subcarrier spacing of carrier 0 and carrier 2 is different, so the subcarrier spacing of the first carrier and the second carrier is different.

[0102] The terminal device can perform one or more sideline transmissions on both the first carrier and the second carrier. Sideline transmissions may include transmissions of sideline channels and / or sideline signals. The sideline channels and / or sideline signals may include, for example, one or more of PSSCH, PSCCH, PSFCH, and S-SSB. One sideline transmission may correspond to one sideline transmission opportunity. One sideline transmission opportunity may transmit one or more sideline channels and / or sideline channels. For example, one PSFCH transmission opportunity may transmit multiple PSFCHs.

[0103] Continuing with the example of Figure 11, in the PSFCH transmission opportunity of carrier 1, the terminal device needs to transmit 4 PSFCHs at the same time (the number of transmitted PSFCHs is not shown in the figure); in the PSFCH transmission opportunity of the first time slot of carrier 3, the terminal device needs to transmit 2 PSFCHs, and in the PSFCH transmission opportunity of the second time slot of carrier 3, the terminal device needs to transmit 8 PSFCHs.

[0104] It should be noted that, in the case where the second carrier includes multiple carriers, one or more side transmissions on the second carrier may be on the same carrier or on different carriers.

[0105] Continuing with reference to Figure 11, for example, if the first carrier is carrier 0, the sidelink transmission on the first carrier may include a PSSCH transmission; if the second carrier is carrier 1, the one or more transmissions on the second carrier may include a PSSCH transmission and a PSFCH transmission on carrier 1. For another example, if the first carrier is carrier 0, the transmission on the first carrier may include a PSSCH transmission; if the second carrier includes carrier 2 and carrier 3, the one or more transmissions on the second carrier may include a PSSCH transmission in the first time slot on carrier 2, and a PSSCH transmission and a PSFCH transmission in the first time slot on carrier 3.

[0106] In some embodiments, the first condition may include one or more of the following: one or more side transmissions of the terminal device on the first carrier overlap in the time domain with one or more side transmissions of the terminal device on the second carrier; and the sum of the transmission powers of the multiple side transmissions of the time domain overlapping portion of the first carrier and the second carrier is greater than (or exceeds) the first transmission power.

[0107] For ease of description, time domain resources corresponding to one or more sidelink transmissions on a first carrier are represented by first resources; time domain resources corresponding to one or more sidelink transmissions on a second carrier are represented by second resources.

[0108] The time domain overlap of one or more sidelink transmissions of a terminal device on a first carrier with one or more sidelink transmissions of a terminal device on a second carrier may mean that, at the same moment, one or more transmissions on the first carrier and one or more transmissions on the second carrier overlap in the time domain. In other words, the overlap may mean that the first resource and the second resource overlap in the time domain.

[0109] It should be noted that the overlap described herein may include complete overlap and partial overlap, i.e., the first resource and the second resource may completely overlap or partially overlap. Complete overlap between the first resource and the second resource may mean that the starting positions and time domain resource lengths of the first resource and the second resource are exactly the same. Partial overlap between the first resource and the second resource may mean that the time domain resources of the first resource and the second resource overlap, but the first resource and the second resource differ in one or more of the following: starting position and time domain resource length.

[0110] It should be noted that the types of sidelink transmissions in the time domain overlap portion can be the same or different. For example, in the time domain overlap portion, the sidelink transmission type of the first carrier can be PSFCH, and the sidelink transmission type of the second carrier can be PSSCH / PSCCH.

[0111] Continuing with Figure 11 as an example, the time domain resources of sidelink transmission are fully or partially overlapped. As shown in Figure 11, the PSSCH resources of carrier 0 partially overlap with the PSSCH resources and PSFCH resources of carrier 1; the PSSCH resources of carrier 0 partially overlap with the PSSCH resources of the first time slot of carrier 2; the PSSCH resources of carrier 0 partially overlap with the PSSCH resources of the second time slot of carrier 2; the PSSCH resources of the first time slot of carrier 3 completely overlap with the PSSCH resources of the first time slot of carrier 4; the PSFCH resources of the first time slot of carrier 3 completely overlap with the PSFCH resources of the first time slot of carrier 4; the PSFCH resources of carrier 1 partially overlap with the PSSCH time domain resources of the second time slot of carrier 2; and the PSFCH resources of carrier 1 partially overlap with the PSFCH time domain resources of the second time slot of carrier 3.

[0112] Optionally, the one or more side transmissions on the first carrier and the one or more side transmissions on the second carrier overlapping in the time domain may refer to the one or more side transmissions on the first carrier and the one or more side transmissions on the second carrier overlapping in time domain resources within a first time range.

[0113] The first time range may include one or more of the following: a time range corresponding to one or more time slots, a time range corresponding to one or more symbols, that is, the first time range may be represented with time slots and / or symbols as granularity.

[0114] In some embodiments, the first time range may be determined based on the subcarrier spacing corresponding to the first carrier and / or the second carrier. For example, the first time range is determined based on the minimum subcarrier spacing corresponding to the first carrier and the second carrier. Alternatively, the first time range is determined based on the maximum subcarrier spacing corresponding to the first carrier and the second carrier.

[0115] The first time range is illustrated below using Figure 12 as an example. In Figure 12, the first carrier corresponds to carrier 1, and the second carrier corresponds to carrier 2. The subcarrier spacing of carrier 1 is 15kHz. The subcarrier spacing of carrier 2 is 30kHz. In Figure 12, the first time range may, for example, correspond to or include one time slot (14 symbols) corresponding to carrier 1, that is, two time slots (28 symbols) corresponding to carrier 2. Alternatively, the first time range may include one time slot (14 symbols) corresponding to carrier 2, that is, half a time slot (7 symbols) corresponding to carrier 1. The following description will be given using the duration of one time slot corresponding to the minimum value (15kHz) of the subcarrier spacing between the first carrier and the second carrier as an example.

[0116] As shown in Figure 12, within a first time range (a time slot of carrier 1), one or more sideline transmissions on the first carrier correspond to the PSSCH (denoted as PSSCH1) and PSFCH transmissions on carrier 1, where the PSFCH transmission may include the transmission of one or more PSFCH channels; one or more sideline transmissions on the second carrier correspond to the PSSCH of the first time slot (denoted as PSSCH2) and the PSSCH of the second time slot (denoted as PSSCH3) on carrier 2. The time domain resources of PSSCH1 on carrier 1 overlap with the time domain resources of PSSCH2 and PSSCH3 on carrier 2; the time domain resources of PSFCH on carrier 1 overlap with the time domain resources of PSSCH3 on carrier 2.

[0117] As can be seen from the first condition, based on the first transmit power, the terminal device can determine whether to adjust the transmit power of sidelink transmission. In other words, the first transmit power can be the threshold for determining whether to adjust the transmit power in multi-carrier sidelink communication. How to determine the first transmit power is described below and is not further elaborated here.

[0118] Based on the first condition, in the case of multi-carrier sidelink transmission, if the first resource and the second resource overlap in the time domain and / or the sum of the transmit powers of multiple sidelink transmissions in the time domain overlapping portion is greater than the first transmit power, the terminal device can adjust the transmit power of the sidelink transmission. Therefore, based on the present application, during multi-carrier sidelink communication, the terminal device can perform power control based on the first condition, thereby avoiding abnormal transmit power on multiple carriers during sidelink transmission, and further avoiding abnormal multi-carrier sidelink communication.

[0119] Next, the first transmission power will be described.

[0120] In some embodiments, the first transmit power can be determined based on one or more of the following: the maximum transmit power of the terminal device, the configured maximum output power of the resource pool configuration on the first carrier, the configured maximum transmission power of the resource pool configuration on the first carrier, the maximum output power of the resource pool configuration on the second carrier, and the maximum transmit power of the resource pool configuration on the second carrier.

[0121] In some implementations, the first transmit power may be determined based on the maximum transmit power of the terminal device. For example, the first transmit power may be equal to the maximum transmit power of the terminal device. Alternatively, the first transmit power may be equal to the maximum transmit power of the terminal device after calculation.

[0122] Optionally, the maximum transmit power of the terminal may be determined based on a power class of the terminal device. For example, for power class 3, the maximum transmit power may be 23 dBm. Alternatively, for power class 2, the maximum transmit power may be 26 dBm.

[0123] The maximum output power of the resource pool configuration and the maximum transmit power of the resource pool configuration can be determined based on the first parameter of the resource pool configuration. The first parameter can be used to indicate the maximum value of the UE's sidelink transmission power on this resource pool. The unit of the first parameter can be, for example, dBm. The first parameter can be expressed as sl-maxTransPower, for example.

[0124] In some implementations, the first transmit power (denoted as P_TX1) can be determined based on a first threshold and / or a second threshold. For example, the first transmit power can be greater than or equal to the first threshold; and / or the first transmit power can be less than or equal to the second threshold. In other words, the first threshold can be the upper limit of the first transmit power (denoted as P_TX1_H), and the second threshold can be the lower limit of the first transmit power (denoted as P_TX1_L). The first transmit power can satisfy the following conditions: P_TX1_L ≤ P_TX1 ≤ P_TX1_H.

[0125] The first threshold and the second threshold may both be determined based on one or more of the following: the second transmit power, the third transmit power, and the fourth transmit power, which will be described below.

[0126] Second transmission power

[0127] The second transmit power may be determined based on a first parameter of a resource pool configuration on the first carrier and / or the second carrier.

[0128] In some embodiments, the second transmit power may be determined based on the sum of linear values ​​corresponding to all or part of the first parameters of the resource pool configuration on the first carrier and the second carrier. For example, the second transmit power may be determined based on the sum of linear values ​​corresponding to the first parameters of the resource pool configuration on all carriers in the first carrier and the second carrier. This sum may be determined, for example, by P temp In other words, P temp It can be used to determine the second transmission power. For example, the decibel value corresponding to the second transmission power can be 10log 10 P temp .

[0129] For example, if one or more side transmissions on the first carrier or one or more side transmissions on the second carrier include PSSCH and / or PSCCH, the first parameter of the resource pool configuration on the first carrier and / or the second carrier may include: the first parameter of the resource pool configuration where the PSSCH and / or PSCCH are located. It can be understood that only one PSCCH and / or one PSSCH can be sent simultaneously on the same carrier. That is, the same carrier cannot send multiple PSCCHs at the same time, or the same carrier cannot send multiple PSSCHs at the same time. Therefore, the second transmit power can be determined based on the first parameter of the resource pool configuration where the PSSCH or PSCCH is located. Alternatively, when PSSCH and PSCCH are sent simultaneously, the second transmit power can be determined based on the first parameter of the resource pool configuration where the PSSCH and PSCCH are located.

[0130] Based on this, for PSSCH and / or PSCCH, one carrier may correspond to one first parameter. temp For example, if one or more sideline transmissions on the first carrier or one or more sideline transmissions on the second carrier are PSSCH and / or PSCCH, then P temp Can satisfy P temp =∑ c P FMAX,c,r Among them, P EMAX,c,r It is determined based on the linear value corresponding to the first parameter configured in the resource pool r where the PSSCH or PSCCH on the carrier c is located.

[0131] For another example, if one or more side transmissions on the first carrier and one or more side transmissions on the second carrier include PSFCH, the first parameter of the resource pool configuration on the first carrier and / or the second carrier may include: the first parameter of each configuration of the one or more resource pools where the PSFCH is located.

[0132] On the same carrier, when there is only one resource pool transmitting PSFCH, the second transmit power can be determined based on the first parameter configured in the resource pool where the PSFCH is located. temp For example, if one or more sideline transmissions on the first carrier or one or more sideline transmissions on the second carrier are PSFCHs, and there is only one resource pool transmitting PSFCH on the same carrier, then P temp Can satisfy P temp =∑ c P EMAX,c,r Among them, P EMAX,c,r It is determined based on the linear value corresponding to the first parameter configured in the resource pool r where the PSFCH on the carrier c is located.

[0133] On the same carrier, when multiple resource pools transmit PSFCH simultaneously, the second transmit power can be determined based on the sum of the first parameters configured in the multiple resource pools where the PSFCH is located. temp When PSFCH is used, the sum of the number of carriers to which PSFCH belongs and the number of resource pools where PSFCH is located on the corresponding carrier can be calculated. For example, if one or more sideline transmissions on the first carrier or one or more sideline transmissions on the second carrier are PSFCH, then P temp Can satisfy P temp =∑ c ∑ r P EMAX,c,r .

[0134] It should be noted that the above methods for determining the second transmit power can be implemented in combination. For example, if one or more sideline transmissions on the first carrier or one or more sideline transmissions on the second carrier include: PSCCH and / or PSSCH, and PSFCH, then P temp Can satisfy P temp =∑ c1 P EMAX,c1,r1 +∑ c2 ∑ r2 P EMAX,c2,r2 Among them, the resource pool r1 on carrier c1 is used to transmit PSCCH and / or PSSCH. The resource pool r2 on carrier c2 is used to transmit PSFCH. EMAX,c1,r1 Determined based on the linear value corresponding to the first parameter configured in the resource pool r1 on the carrier c1. EMAX,c2,r2Determined based on the linear value corresponding to the first parameter configured in the resource pool r2 on the carrier c2. c1 P EMAX,c1,r1 represents the sum of the first parameter configured for the resource pool where the PSSCH or PSCCH on all carriers transmitting the PSSCH or PSCCH is located, ∑ c2 ∑ c2 P EMAX,c2,r2 It represents the sum of the first parameters configured in the resource pool where the PSFCH on all carriers transmitting the PSFCH is located.

[0135] The third transmission power

[0136] The third transmission power may be determined according to a power class and / or a power reduction parameter of the terminal device.

[0137] Based on the power level, the power level P can be determined PowerClass Based on P PowerClass A third transmission power may be determined. For example, for power level 3, P PowerClass For power level 2, P PowerClass It can be 26dBm. PowerClass It can also be determined based on other methods. For example, P PowerClass It can be determined based on the maximum transmit power of the terminal device.

[0138] The power reduction parameters may include one or more of the following: maximum power reduction (MPR), additional maximum power reduction (A-MPR), and power management maximum power reduction (PMR). The MPR may be determined based on the maximum power reduction value allowed by the terminal device. The A-MPR may be determined based on the additional maximum power reduction value allowed by the terminal device.

[0139] The third transmit power may also be determined based on other information. The other information may include, for example, an additional tolerance. The additional tolerance may be determined by ΔT IB express.

[0140] For different thresholds, the third transmit power can be calculated in different ways. For example, for the first threshold, the third transmit power can be calculated according to the formula P PowerClass –MAX(MAX(MPR,A-MPR)+ΔT IB , P-MPR). For another example, for the second threshold, the third transmit power can be P PowerClass. MAX(A,B) means taking the maximum value of A and B.

[0141] Fourth transmission power

[0142] The fourth transmission power may be determined based on regulations. Regulatory Indicates the fourth transmission power.

[0143] In some embodiments, the regulations may specify a specific area. For example, the regulations may specify a dedicated short-range communication (DSRC) charging system protection area. The value of the fourth transmit power may be related to whether the terminal device is located in the DSRC charging system protection area. For example, when the terminal device operates in frequency band n47 and is located in the DSRC charging system protection area, the fourth transmit power may meet the following requirements: P Regulatory =10-G post connector dBm; When the terminal device is not operating in the frequency band n47, or is not located in the DSRC charging system protection area, the fourth transmission power can meet: P Regulatory =33-G post connector dBm. Among them, G post connector Possible values ​​include: 0, 1, 2, 3, 4, 5, 6 or 7dBi. post connector The default value may be 0dBi.

[0144] In some embodiments, the first threshold and / or the second threshold may be determined based on the type of sidelink signals or sidelink channels included in one or more sidelink transmissions on the first carrier and one or more sidelink transmissions on the second carrier.

[0145] For example, if one or more side transmissions on the first carrier and one or more side transmissions on the second carrier include one or more of PSCCH, PSSCH, and PSFCH, the first threshold and / or the second threshold may be determined based on the minimum value of the second transmit power, the third transmit power, and the fourth transmit power. For example, the first threshold may satisfy: MIN{10log 10 P temp ,P PowerClass –MAX(MAX(MPR,A-MPR)+ΔT IB ,P-MPR),P Regulatory}; The second threshold can meet: MIN{10log 10 P temp ,P PowerClass ,P Regulatory}. MIN(A, B, C) means taking the minimum value among A, B, and C.

[0146] For another example, if one or more sideline transmissions on the first carrier and one or more sideline transmissions on the second carrier include SSB, the first threshold and / or the second threshold are determined based on the minimum value of the third power and the fourth power. Exemplarily, the first threshold may satisfy: MIN{P PowerClass –MAX(MAX(MPR,A-MPR)+ΔT IB ,P-MPR),P Regulatory}; The second threshold can meet: MIN{P PowerClass ,P Regulatory}. MIN(A, B) means taking the minimum value of A and B.

[0147] As noted above, the first condition may include: the sum of the transmit powers of multiple sideline transmissions in the time-domain overlapping portion of the first carrier and the second carrier is greater than the first transmit power. Alternatively, the sum of the transmit powers of multiple sideline transmissions in the time-domain overlapping portion may be determined based on the maximum sum of the transmit powers of multiple sideline transmissions in the time-domain overlapping portion. This description continues with Figure 12 as an example.

[0148] In Figure 12, the transmit power of PSSCH1 is P1, the transmit power of PSSCH2 is P2, the transmit power of PSSCH3 is P3, and the total transmit power of PSFCH transmissions is P4. In the time-domain overlap portion of PSSCH1 and PSSCH2, the total transmit power is P1+P2; in the time-domain overlap portion of PSSCH1 and PSSCH3, the total transmit power is P1+P3; and in the time-domain overlap portion of PSFCH and PSSCH3, the total transmit power is P3+P4. Based on this, the total transmit power of multiple sidelink transmissions in the time-domain overlap portion can be determined based on the maximum of P1+P2, P1+P3, and P3+P4.

[0149] As described in step S1010, if the first condition is met, the terminal device may adjust the transmit power of the sideline transmission. In some embodiments, after the terminal device adjusts the transmit power of the sideline transmission, the transmit power of the sideline transmission in the time domain overlap portion may be less than or equal to (i.e., not greater than or not greater than) the first transmit power.

[0150] As a possible implementation, the terminal device may reduce the transmit power of one or more sideline transmissions in the time-domain overlapping portion of the terminal device, so that the transmit power of the sideline transmissions in the time-domain overlapping portion is less than or equal to the first transmit power. For example, if one or more sideline transmissions on a first carrier overlap in the time domain with one or more sideline transmissions on a second carrier, and the sum of the transmit powers of the multiple sideline transmissions in the time-domain overlapping portion of the first and second carriers is greater than the first transmit power, the terminal device may reduce the transmit power of the one or more sideline transmissions in the time-domain overlapping portion, so that the sum of the transmit powers of the multiple sideline transmissions in the overlapping portion is no greater than the first transmit power, or the transmit power of the one or more sideline transmissions in the time-domain overlapping portion is zero. If, after the transmit power of one or more sideline transmissions in the time-domain overlapping portion is zero, the sum of the transmit powers of the remaining sideline transmissions in the time-domain overlapping portion is still greater than the first transmit power, the terminal device may reselect one or more sideline transmissions from the remaining sideline transmissions and continue to reduce the transmit power, so that the sum of the transmit powers of the multiple sideline transmissions in the time-domain overlapping portion is no greater than the first transmit power, or the transmit power of the reselected one or more sideline transmissions is zero. If the transmission power of one or more side transmissions selected again is 0, and the sum of the transmission powers of the remaining side transmissions in the time domain overlapping part is still greater than the first transmission power, the terminal device can repeat the above steps until the sum of the transmission powers of multiple side transmissions in the time domain overlapping part is no greater than the first transmission power.

[0151] As another possible implementation, the terminal device's adjustment of the transmit power of the sideline transmission may depend on the terminal device's implementation. For example, reducing the transmit power of one or more sideline transmissions (until the transmit power is 0) may be one implementation. Another example is reducing the transmit power of one or more sideline transmissions until the transmit power reaches a minimum transmit power value. This minimum transmit power value may be based on the terminal device's implementation or determined based on pre-configured information or network configuration information.

[0152] In some embodiments, the terminal device may adjust the transmission power of the sidelink transmission according to the sidelink priority (referred to as priority) corresponding to one or more sidelink transmissions on the first carrier and / or the sidelink priority corresponding to one or more sidelink transmissions on the second carrier. For PSSCH or PSCCH, the sidelink priority may be indicated by the "priority" information field in the sidelink control information (SCI); for PSFCH, the sidelink priority may be determined by the priority of the PSSCH associated with the sidelink feedback information carried by the PSFCH; for S-SSB, the sidelink priority may be determined based on pre-configuration information or network configuration information. The higher the value of the sidelink priority, the lower the priority of the corresponding sidelink transmission.

[0153] In some implementations, the terminal device may determine which carrier or carriers to adjust the transmit power of the sidelink transmission on based on the priority associated with the carriers. The priority associated with the carriers may be determined based on the minimum value of the sidelink priority values ​​corresponding to one or more sidelink transmissions in the time domain overlapping portion on the corresponding carrier. For example, the priority associated with the first carrier may be a first value. The first value may be determined based on the minimum value of the sidelink priority values ​​corresponding to one or more sidelink transmissions on the first carrier. The priority associated with the second carrier may be a second value. The second value may be determined based on the minimum value of the sidelink priority values ​​corresponding to one or more sidelink transmissions on the second carrier.

[0154] It should be noted that, in the case where the second carrier includes multiple carriers, the priority associated with the second carrier may include one or more priorities. That is, the second value may include one or more values. For example, in the case where the priority associated with the second carrier includes multiple priorities, the number of priorities may be the same as the number of carriers included in the second carrier. Multiple carriers may correspond one-to-one to multiple priorities, that is, each of the multiple carriers may correspond to its own priority. Exemplarily, the priority associated with each carrier may be determined based on the minimum value of the side priority corresponding to one or more side transmissions of the time domain overlapping portion on the corresponding carrier. Alternatively, multiple carriers may correspond to one priority as a whole. Exemplarily, a priority corresponding to multiple carriers (i.e., the second value) may be determined based on the minimum value of the side priority corresponding to multiple side transmissions of the time domain overlapping portion on the multiple carriers.

[0155] As described above, the smaller the sideline priority value of the sideline transmission, the higher the priority of the corresponding sideline transmission. Therefore, based on the minimum value of the priority value, the present application can represent the priority of the corresponding carrier by the highest priority of one or more sideline transmissions on the carrier.

[0156] In some embodiments, the terminal device may adjust the transmit power of the sideline transmission based on the magnitude relationship between the first value and the second value. Exemplarily, the terminal device may perform one or more of the following operations: if the first value is less than the second value, the terminal device may reduce the transmit power of one or more sideline transmissions on the second carrier; if the first value is less than or equal to the second value, the terminal device may reduce the transmit power of one or more sideline transmissions on the second carrier; if the first value is greater than the second value, the terminal device may reduce the transmit power of one or more sideline transmissions on the first carrier; if the first value is greater than or equal to the second value, the terminal device may reduce the transmit power of one or more sideline transmissions on the first carrier.

[0157] It should be noted that if the second value includes multiple values, then when judging the size relationship between the first value and the second value, any one of the following values ​​corresponding to the multiple values ​​can be used as the second value: maximum value, minimum value, and calculated value. The value obtained by calculating multiple values ​​can be, for example, the average value of multiple values. In the example of Figure 12, the PSSCH1 and PSFCH transmissions of carrier 1 overlap with the PSSCH2 and PSSCH3 of carrier 2 in the time domain. Therefore, the priority associated with carrier 1 and carrier 2 can be determined based on the priority of PSSCH1, PSSCH2, PSSCH3 and PSFCH transmission. The terminal device can adjust the transmission power according to the priority associated with carrier 1 and carrier 2. If the priority value corresponding to PSSCH1 is 3, and the PSFCH transmission includes 4 PSFCHs, and the lowest value of the priority value corresponding to the 4 PSFCHs is 4, then the minimum value of the side priority value corresponding to one or more side transmissions on the first carrier is 3, that is, the first value is 3. The priority values ​​of PSSCH2 and PSSCH3 are 2 and 5, respectively. Therefore, the minimum value of the sidelink priority value corresponding to one or more sidelink transmissions on the second carrier is 2, that is, the second value is 2. Based on the result of the comparison of the priority values ​​(the first value is greater than the second value), the transmit power of the sidelink transmission on carrier 1 (that is, the transmit power of PSSCH1 and / or PSFCH) needs to be reduced.

[0158] In Figure 12, the transmit power of PSSCH1 is P1, the transmit power of PSSCH2 is P2, the transmit power of PSSCH3 is P3, and the sum of the transmit powers of the four PSFCHs is P4. The terminal device can adjust the transmit power of sidelink transmissions based on different situations. The following examples illustrate this using Cases 1 to 3.

[0159] Case 1: If the sum of the powers of the overlapping parts in the time domain P1+P2 is less than the first transmit power, P1+P3 is greater than the first transmit power, and P3+P4 is less than the first transmit power, the terminal device can reduce the transmit power P1 of PSSCH1 until the sum of the powers of P1+P3 is less than the first transmit power, or until P1 is equal to 0.

[0160] Case 2: If the sum of the powers of the overlapping parts in the time domain P1+P2 is less than the first transmit power, P1+P3 is greater than the first transmit power, and P3+P4 is greater than the first transmit power, the terminal device can reduce the transmit power P1 of PSSCH1 until the sum of the powers of P1+P3 is less than the first transmit power, or until P1 is equal to 0; and the terminal device can reduce the transmit power P4 of PSFCH until the sum of the powers of P3+P4 is less than the first transmit power, or until P4 is equal to 0.

[0161] Case 3: If the sum of the powers of the overlapping parts in the time domain P1+P2 is greater than the first transmit power, P1+P3 is greater than the first transmit power, and P3+P4 is greater than the first transmit power, the terminal device can reduce the transmit power P1 of PSSCH1 until the power sum of P1+P2 is less than the first transmit power and the power sum of P1+P3 is less than the first transmit power, or until P1 is equal to 0; and the terminal device can reduce the transmit power P4 of PSFCH until the power sum of P3+P4 is less than the first transmit power, or until P4 is equal to 0.

[0162] In the case where the second carrier includes multiple carriers, the terminal device can select the first carrier and the carrier with the highest associated priority value among the multiple carriers as the target carrier, and adjust or reduce the transmission power of one or more side transmissions in the time domain overlapping part on the target carrier. In the case where the transmission power of one or more side transmissions in the time domain overlapping part on the target carrier is adjusted or reduced (such as reduced to 0), if the transmission power of the side transmission in the time domain overlapping part of the remaining carriers is still greater than the first transmission power, the terminal device can use the carrier with the highest priority value among the remaining carriers as the target carrier, and repeat the steps of adjusting or reducing the transmission power of one or more side transmissions in the time domain overlapping part on the target carrier until the transmission power of the side transmission in the time domain overlapping part is less than or equal to the first transmission power. In other words, the terminal device can first adjust the transmission power of one or more side transmissions in the time domain overlapping part on the carrier with the highest priority value. If the sum of the transmission powers of the time domain overlapping parts is still high after adjustment, the terminal device can select the carrier with the highest priority value among the remaining carriers to continue adjusting the one or more side transmissions in the time domain overlapping part until the sum of the transmission powers of the time domain overlapping parts meets the requirements (for example, not exceeding the first transmission power). The following description will be made using FIG13 as an example.

[0163] As shown in Figure 13, the terminal device performs sideline transmission on carrier 1, carrier 2, and carrier 3. The terminal device transmits PSSCH1 in the PSSCH transmission resource of carrier 1, and there is no PSFCH transmission in the PSFCH resource in this time slot. The terminal device transmits PSSCH2 in the PSSCH resource of the first time slot of carrier 2, and there is no PSSCH transmission in the PSSCH resource of the second time slot. The terminal device transmits PSSCH3 in the PSSCH resource of the first time slot of carrier 3, there is no PSFCH transmission in the first time slot of carrier 3, there is no PSSCH transmission in the PSSCH resource of the second time slot of carrier 3, and there is no PSFCH transmission in the PSFCH resource of the second time slot of carrier 3. The corresponding transmit powers of PSSCH1, PSSCH2, and PSSCH3 are P1, P2, and P3, respectively, and P1+P2+P3 is greater than the first transmit power. The corresponding sideline priority values ​​of PSSCH1, PSSCH2, and PSSCH3 are 2, 3, and 4, respectively. Then the priorities associated with carrier 1, carrier 2, and carrier 3 are 2, 3, and 4 respectively. Since the priority associated with carrier 3 is the lowest (the highest value), the transmit power P3 of PSSCH3 on carrier 3 is adjusted. If the adjusted P3 satisfies that P1+P2+P3 is not greater than the first transmit power, the terminal device can use the adjusted P3 to send PSSCH3, and use P1 and P2 to send PSSCH1 and PSSCH2 respectively. If P3 is adjusted to 0, and P1+P2 is still greater than the first transmit power, the terminal device can choose to further adjust the transmit power P2 of PSSCH2 on carrier 2 according to the priorities associated with carrier 1 and carrier 2, so that P1+P2 is not greater than the first transmit power or adjust P2 to 0, and so on.

[0164] As a possible implementation, the terminal device may reduce the transmit power of one or more sideline transmissions in the multiple sideline transmissions in the time-domain overlapping portion based on the sideline priority corresponding to the sideline transmission. The one or more sideline transmissions in the multiple sideline transmissions in the time-domain overlapping portion may belong to the same carrier (e.g., the target carrier) or to different carriers.

[0165] In some embodiments, the terminal device may adjust or reduce the transmit power of a first sideline transmission, where the first sideline transmission is the sideline transmission with the highest corresponding sideline priority value among the sideline transmissions in the time-domain overlap portion; after the transmit power of the first sideline transmission is adjusted or reduced (e.g., reduced to 0), if the transmit power of the remaining sideline transmissions in the time-domain overlap portion is greater than the first transmit power, the terminal device uses the sideline transmission with the highest corresponding sideline priority value among the remaining sideline transmissions as the first sideline transmission, and repeatedly performs the step of reducing the transmit power of the first sideline transmission until the transmit power of the sideline transmissions in the time-domain overlap portion is less than or equal to the first transmit power. This is illustrated below with reference to FIG14 and FIG13 , respectively.

[0166] In Figure 14, the first time slot of carrier 3 includes PSSCH4 and PSFCH1 transmission resources. The second time slot of carrier 3 includes PSSCH5 and PSFCH2 transmission resources. The first time slot of carrier 4 includes PSFCH3 transmission resources. The second time slot of carrier 4 includes PSSCH6 transmission resources. As shown in Figure 14, PSFCH1 and PSFCH3 overlap in time domain, PSSCH6 overlaps with the time domain resources of PSSCH5 and PSFCH2, and there is no sideline transmission in carrier 4 that overlaps with the time domain resources of PSSCH4. For the time domain overlapping portion of PSFCH1 and PSFCH3, if the sum of the transmit power of PSFCH1 and PSFCH3 exceeds the first transmit power, the transmit power of PSFCH1 or PSFCH3 is adjusted based on the priority comparison result of PSFCH1 and PSFCH3. For example, if the priority value of PSFCH1 is less than the priority value of PSFCH3, the transmission power of PSFCH3 is adjusted or reduced until the sum of the transmission powers of PSFCH1 and PSFCH3 is less than or equal to the first transmission power, or until the transmission power of PSFCH3 is 0.

[0167] The following continues with reference to FIG14 to illustrate the situation where one or more of the multiple side transmissions of the time domain overlapping portion adjusted or reduced by the terminal device may belong to the same carrier.

[0168] For the time domain overlapping part of PSSCH6 and PSSCH5 and PSFCH2, if the sum of the transmit powers of PSSCH5 and PSSCH6 exceeds the first transmit power, or the sum of the transmit powers of PSFCH2 and PSSCH6 exceeds the first transmit power, then based on the minimum value of the priority values ​​of PSSCH5 and PSFCH2, it is compared with the priority value of PSSCH6. If the minimum value of the priority values ​​of PSSCH5 and PSFCH2 is less than the corresponding priority value of PSSCH6, the transmit power of PSSCH6 is adjusted until the sum of the transmit powers of the side transmissions with time domain overlap on the two carriers does not exceed the first transmit power, or until the transmit power of PSSCH6 is 0. If the minimum value of the priority values ​​of PSSCH5 and PSFCH2 is greater than the priority value corresponding to PSSCH6, the transmit power of PSSCH5 and / or PSFCH2 is adjusted; if the sum of the transmit powers of PSSCH5 and PSSCH6 exceeds the first transmit power, and the sum of the transmit powers of PSFCH2 and PSSCH6 is less than the first transmit power, the transmit power of PSSCH5 is adjusted until the sum of the transmit powers of PSSCH5 and PSSCH6 does not exceed the first transmit power, or until the transmit power of PSSCH5 is 0; if PSSCH5 is greater than the first transmit power, the transmit power of PSSCH5 is adjusted until the sum of the transmit powers of PSSCH5 and PSSCH6 does not exceed the first transmit power, or until the transmit power of PSSCH5 is 0; If the sum of the transmit powers of SCH5 and PSSCH6 exceeds the first transmit power, and the sum of the transmit powers of PSFCH2 and PSSCH6 also exceeds the first transmit power, the transmit power of PSSCH5 is adjusted until the sum of the transmit powers of PSSCH5 and PSSCH6 does not exceed the first transmit power, or until the transmit power of PSSCH5 is 0, and the transmit power of PSFCH2 is adjusted until the sum of the transmit powers of PSFCH2 and PSSCH6 does not exceed the first transmit power, or until the transmit power of PSFCH2 is 0.

[0169] As shown in Figure 13, the transmission powers corresponding to PSSCH1, PSSCH2 and PSSCH3 are P1, P2 and P3 respectively, and P1+P2+P3 is greater than the first transmission power. The sideline priority values ​​corresponding to PSSCH1, PSSCH2 and PSSCH3 are 2, 3 and 4 respectively; since PSSCH3 has the lowest priority, the transmission power P3 of PSSCH3 is adjusted. If the adjusted P3 satisfies P1+P2+P3 not greater than the first transmission power, the terminal device can use the adjusted P3 to send PSSCH3, and use P1 and P2 to send PSSCH1 and PSSCH2 respectively; if P3 is adjusted to 0, P1+P2 is still greater than the first transmission power, the terminal device can further adjust the transmission power P2 of PSSCH2 so that P1+P2 is not greater than the first transmission power, and so on.

[0170] Optionally, the transmit power of multiple sideline transmissions can be reduced proportionally. For example, if the number of sideline transmissions requiring transmit power reduction is M, the terminal device can proportionally reduce the transmit power of each of the M sideline transmissions. M can be a positive integer greater than 1. Exemplarily, the total transmit power of the M sideline transmissions is P_total. When the total transmit power of the M sideline transmissions is adjusted to P_target, the total transmit power of the time-domain overlapping portion is no greater than the first transmit power. Therefore, each sideline transmission needs to be adjusted from P_total / N to P_target / M.

[0171] It should be noted that the sideline transmission priorities of the M sideline transmissions may be the same or different. For example, the terminal device may not consider the sideline transmission priorities of the M sideline transmissions and proportionally reduce the transmit power of the M sideline transmissions. Alternatively, if the sideline transmission priorities of the M sideline transmissions are equal, the terminal device may proportionally reduce the transmit power of the M sideline transmissions.

[0172] It should be noted that the M sidelink transmissions can belong to the same carrier. For example, the same carrier can be the target carrier described above. In other words, if there are M sidelink transmissions on the target carrier whose transmit power needs to be reduced, the terminal device can proportionally reduce the transmit power of the M sidelink transmissions on the target carrier.

[0173] Continuing to refer to Figure 14, it is pointed out above that if the minimum value of the priority values ​​of PSSCH5 and PSFCH2 on carrier 3 is greater than the priority value corresponding to PSSCH6 on carrier 4, the terminal device can adjust the transmit power of PSSCH5 and / or PSFCH2. For example, the terminal device can adjust the transmit power of PSSCH5 and PSFCH2 proportionally. Alternatively, if the priority value of PSSCH5 is less than the priority value of PSFCH2, the terminal device can adjust the transmit power of PSFCH2 until the transmit power of PSFCH2 is 0 or the sum of the powers of PSSCH5, PSFCH2 and PSSCH6 is less than the first transmit power. Alternatively, if the priority value of PSSCH5 is greater than or equal to the priority value of PSFCH2, the terminal device can adjust the transmit power of PSSCH5 until the transmit power of PSSCH5 is 0 or the sum of the powers of PSSCH5, PSFCH2 and PSSCH6 is less than the first transmit power.

[0174] In some embodiments, if the sidelink transmission for which the transmit power needs to be adjusted includes N PSFCHs, the terminal device may adjust the transmit power of the N PSFCHs using the following method 1 and method 2, where N may be a positive integer greater than or equal to 1.

[0175] Method 1: Adjust the transmission power of N PSFCHs according to the sidelink priorities corresponding to the N PSFCHs.

[0176] For example, the terminal device can reduce the transmission power of the first PSFCH, where the first PSFCH is the PSFCH with the highest corresponding sideline priority value among the N PSFCHs; when the transmission power of the first PSFCH is reduced to 0, if the transmission power of the remaining sideline transmissions in the time domain overlap is greater than the first transmission power, the terminal device uses the PSFCH with the highest corresponding sideline priority value among the remaining PSFCHs as the first PSFCH, and repeats the step of reducing the transmission power of the first PSFCH until the transmission power of the sideline transmission in the time domain overlap is less than or equal to the first transmission power. In other words, the terminal device can reduce the transmission power of the PSFCH with the maximum priority value (i.e., corresponding to the lowest priority) according to the priorities corresponding to the N PSFCHs, including reducing it to 0, and repeating the above steps until the total transmission power of the time domain overlap is not greater than the first transmission power.

[0177] Method 2: Proportionally reduce the transmit power of N PSFCHs. For example, the terminal device may proportionally reduce the transmit power of each of the N PSFCHs until the total transmit power of the time-domain overlapping portion is no greater than the first transmit power, or until the transmit power of the N PSFCHs is 0. Exemplarily, the total transmit power of the N PSFCHs is P_PSFCH_total. When the total transmit power of the N PSFCHs is adjusted to P_PSFCH_target, the total transmit power of the time-domain overlapping portion is no greater than the first transmit power. Therefore, each PSFCH needs to be adjusted from P_PSFCH_total / N to P_PSFCH_target / N.

[0178] Optionally, if multiple side transmissions in the time domain overlapping part include PSFCH transmission, the PSFCH transmission may include one or more PSFCHs. Before performing power adjustment based on the above criteria, the number of PSFCH channels in the PSFCH transmission on a carrier and the transmission power of the PSFCH may be determined based on the following method.

[0179] For a carrier, there may be multiple PSFCHs that need to be sent simultaneously in the PSFCH transmission opportunity of the carrier. The terminal device can determine the number of PSFCHs that need to be sent simultaneously based on the following information: Tx,PSFCH and / or transmit power per PSFCH: the maximum number of PSFCHs that a terminal device can transmit simultaneously, N max,PSFCH The following describes how to determine the second transmission power.

[0180] The second transmit power may be determined based on one or more of the following: the maximum available transmit power of the PSFCH, the maximum transmit power of the terminal device, the configured maximum output power (or the configured maximum transmit power), and the sum of the configured maximum output powers of the resource pools on multiple carriers where multiple sidelink transmissions with time domain overlap are located. Each of these is described below.

[0181] The maximum available transmit power of PSFCH can be expressed as P available . Optionally, P available It can be determined based on one or more of the following parameters: the priority value of multiple side transmissions overlapping in time domain on multiple carriers, the first transmission power, and the transmission power of other side transmissions in multiple side transmissions overlapping in time domain on multiple carriers except for the multiple PSFCHs to be transmitted corresponding to the PSFCH transmission opportunity.

[0182] In one embodiment, P available Can satisfy Among them, P TX1 represents the first transmission power, C represents the priority value of multiple side transmissions with time domain overlap on multiple carriers is less than P prio The number of carriers, P prio Indicates the minimum priority value corresponding to multiple PSFCHs to be transmitted in the PSFCH transmission opportunity, P c In one embodiment, the second transmit power is equal to the maximum available transmit power of PSFCH (i.e., P available) .

[0183] For example, as shown in Figure 15, the PSFCH transmission opportunity in the second time slot of carrier 3 includes multiple PSFCHs to be sent. The highest priority value of PSFCH among the multiple PSFCHs to be sent is 3. PSSCH5 and PSFCH of carrier 3 overlap with the time domain resources of PSSCH6 on carrier 4, and the sum of the transmit powers of PSSCH5 and PSSCH6 is less than the first transmit power. If the value corresponding to the highest priority of the multiple PSFCHs to be sent is greater than the value corresponding to the priority of PSSCH6, then when the sum of the transmit power of PSFCH and the transmit power of PSSCH6 exceeds the first transmit power, the transmit power of PSFCH needs to be reduced. Therefore, the maximum available transmit power of PSFCH can be determined based on the first transmit power and the transmit power of PSSCH6. For example, P available =P TX1 -P PSSCH6 Among them, P TX1 represents the first transmission power, P PSSCH6 Indicates the transmission power of PSSCH6.

[0184] The maximum transmit power of a terminal device may be determined based on the power class of the terminal device, for example.

[0185] The configured maximum output power (or configured maximum output power) is used to determine the maximum transmit power of the terminal device on the resource pool or carrier. The configured maximum output power (or configured maximum output power) can be determined based on the first parameter of the high-level configuration (e.g., parameter sl-maxTransPower).

[0186] The sum of the maximum output powers of the resource pools configured on multiple carriers where multiple side transmissions overlap in the time domain can be expressed as P TX .P TX Can satisfy Among them, P Emax,r,c represents the maximum output power configured by resource pool r of carrier c, C represents the number of carriers where multiple side transmissions overlap in the time domain are located, R represents the number of resource pools corresponding to PSFCHs that need to be transmitted simultaneously in one carrier, and resource pool r represents the resource pool where the multiple side transmissions overlap in the time domain are located. In one embodiment, the second transmit power is equal to the sum of the maximum output powers configured by resource pools on multiple carriers where the multiple side transmissions overlap in the time domain are located (i.e., P TX ).

[0187] The number of PSFCHs that the terminal device needs to send in the PSFCH transmission opportunity can be expressed as N sch,Tx,PSFCH The N sch,Tx,PSFCH The PSFCH may include a PSFCH carrying HARQ information and / or conflict information. 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 on each PSFCH.

[0188] Determine the actual transmit power P of each PSFCH PSFCH And the number of PSFCHs actually sent by the terminal N Tx,PSFCH The general principle is that the transmission power of each PSFCH is the same and does not exceed P PSFCH,one , and N Tx,PSFCH The total transmit power of the PSFCHs does not exceed the second transmit power. If the second transmit power is exceeded, the terminal determines the number of PSFCHs to be transmitted according to the PSFCH priority, but the number of transmitted PSFCHs is not less than a lower limit so that the transmit power of each PSFCH is less than or equal to P. PSFH,one . Among them, P PSFCH,one The calculation formula is: PSFCH,one =P O_PSFCH+10log 10 (2 u )+α PSFCH ·PL D [dBm].

[0189] Among them, P O_PSFCH The basic operating point of the PSFCH transmit power based on downlink path loss power control configured by the higher layer signaling; α PSFCH Configure the downlink path loss compensation factor for PSFCH power control for high-level signaling (if not configured, the corresponding value can be 1); PL D Estimated downlink path loss for the terminal device.

[0190] In some embodiments, the present application proposes to determine the actual transmit power P of each PSFCH for one of cases 1 to 4. PSFCH And the number of PSFCHs actually sent by the terminal N Tx,PSFCH method.

[0191] Case 1: The higher layer configures PSFCH to perform power control based on downlink path loss. N sch,Tx,PSFCH No more than N max,PSFCH , and satisfy the condition P PSFCH,one +10log 10 (N sch,Tx,PDFCH )≤P TX2 , that is, the power P of each PSFCH PSFCH Set to P PSFCH,one When the total power does not exceed the second transmission power P TX2 .

[0192] In case 1, the terminal device can determine the following information: N Tx,PSFCH =N sch,Tx,PSFCH ; P PSFCH =P PSFCH,one .

[0193] Case 2: The higher layer configures PSFCH to perform power control based on downlink path loss. N sch,Tx,PSFCH No more than N max,PSFCH , but P PSFCH,one +10log 10 (N sch,Tx,PSFCH )>P TX2 .

[0194] In case 2, the terminal device can independently determine N Tx,PSFCH Not less than a lower limit N limit .

[0195] N limit The determination method may include, for example: the terminal device schedules N sch,Tx,PSFCHSort the PSFCHs by priority from high to low, and send each PSFCH according to the transmission power P PSFCH,one Superimposed in sequence, the total superimposed power does not exceed P TX2 The maximum number of PSFCHs is N limit (0≤N limit <N sch,Tx,PSFCH ).

[0196] The terminal device can determine P PSFCH Satisfy: P PSFCH =min(P TX2 -10log 10 (N Tx,PSFCH ),P PSFCH,one ) [dBm].

[0197] Case 3: The higher layer configures PSFCH to perform power control based on downlink path loss. N sch,Tx,PSFCH More than N max,PSFCH .

[0198] In case 3, the terminal device can follow the sideline priority of PSFCH in N sch,Tx,PSFCH PSFCH selects the N with the highest priority on the PSFCH side max,PSFCH PSFCH, and then in N max,PSFCH PSFCH selects N Tx,PSFCH PSFCH. Specifically determine N Tx,PSFCH The method of determining the number of PSFCHs and the transmission power of each PSFCH is the same as in the above cases (1) and (2). It is only necessary to change N in (1) and (2) sch,Tx,PSFCH Replace with N max,PSFCH That's it.

[0199] Case 4: The higher layer does not configure PSFCH to perform power control based on downlink path loss.

[0200] In case 4, the terminal device can autonomously select N according to the PSFCH side priority from high to low. Tx,PSFCH (N Tx,PSFCH ≥1) PSFCH, the transmission power of each PSFCH can be: P PSFCH =P TX2 -10log 10 (N Tx,PSFCH ) [dBm]

[0201] Optionally, the above process of determining PSFCH can be performed separately for each carrier. In this case, the maximum number N of PSFCHs that the terminal device can send simultaneously is max,PSFCH It can indicate the maximum number of PSFCHs that a terminal device can send simultaneously on one carrier.

[0202] Optionally, the above process of determining PSFCH can be performed in multiple carriers included in a frequency band. In this case, the maximum number N of PSFCHs that the terminal device can send simultaneously is max,PSFCH It can represent the maximum number of PSFCHs that a terminal device can simultaneously transmit on all carriers included in a frequency band.

[0203] As shown in Figure 16, carrier 0 and carrier 1 are in the same frequency band. There are 6 PSFCHs to be transmitted in the PSFCH transmission opportunity on carrier 0. There are 5 PSFCHs to be transmitted in the PSFCH transmission opportunity on carrier 1. If the number of PSFCHs that the terminal device can transmit simultaneously in each frequency band is N, max,PSFCH =8, the terminal device selects 8 PSFCHs from a total of 11 PSFCHs to be transmitted, and calculates the transmit power of each PSFCH as P PSFCH,one If 6 PSFCHs are selected in carrier 0, the total transmit power of the 6 PSFCHs is 6·P PSFCH,one If two PSFCHs are selected in carrier 1, the total transmit power of the two PSFCHs is 2·PP SFCH,one .

[0204] Optionally, the above process of determining PSFCH can be performed in multiple carriers. Multiple carriers can be located in different frequency bands. In this case, the maximum number N of PSFCHs that the terminal can send simultaneously is max,PSFCH It indicates the maximum number of PSFCHs that the terminal can send simultaneously on all carriers, or the maximum number of PSFCHs that the terminal can send simultaneously.

[0205] The method embodiments of the present application are described in detail above, and the device embodiments of the present application are described in detail below. It should be understood that the description of the method embodiments corresponds to the description of the device embodiments, so for parts not described in detail, reference can be made to the above method embodiments.

[0206] FIG17 is a schematic structural diagram of a terminal device 1700 provided in an embodiment of the present application. The terminal device 1700 may include an adjustment unit 1710 .

[0207] The adjustment unit 1710 can be used to adjust the transmission power of the side transmission if a first condition is met; wherein the first condition includes one or more of the following: one or more side transmissions of the terminal device on the first carrier overlap with one or more side transmissions of the terminal device on the second carrier in the time domain; and the sum of the transmission powers of multiple side transmissions in the time domain overlapping part of the first carrier and the second carrier is greater than the first transmission power.

[0208] In some embodiments, the first transmit power is determined based on one or more of: the maximum transmit power of the terminal device; the maximum output power of the resource pool configuration on the first carrier; the maximum transmit power of the resource pool configuration on the first carrier; the maximum output power of the resource pool configuration on the second carrier; and the maximum transmit power of the resource pool configuration on the second carrier.

[0209] In some embodiments, the first transmit power is greater than or equal to a first threshold; and / or the first transmit power is less than or equal to a second threshold.

[0210] In some embodiments, the first threshold and / or the second threshold are determined based on one or more of the following: a second transmit power, determined based on a first parameter of the resource pool configuration on the first carrier and / or the second carrier; a third transmit power, determined based on a power level and / or a power reduction parameter of the terminal device; and a fourth transmit power, determined based on regulations; wherein the first parameter is used to indicate the maximum value of the side transmission power of the terminal device in the resource pool.

[0211] In some embodiments, the second transmit power is determined based on a sum of linear values ​​corresponding to first parameters of the resource pool configurations on the first carrier and the second carrier.

[0212] In some embodiments, if one or more sidelink transmissions on the first carrier or one or more sidelink transmissions on the second carrier include PSSCH and / or PSCCH, the first parameter of the resource pool configuration on the first carrier and / or the second carrier includes: the first parameter of the resource pool configuration where the PSSCH and / or PSCCH are located.

[0213] In some embodiments, if one or more side transmissions on the first carrier and one or more side transmissions on the second carrier include PSFCH, the first parameter of the resource pool configuration on the first carrier and / or the second carrier includes: the first parameter configured in each of the one or more resource pools where the PSFCH is located.

[0214] In some embodiments, if one or more side transmissions on the first carrier and one or more side transmissions on the second carrier include one or more of PSCCH, PSSCH and PSFCH, the first threshold and / or the second threshold is determined based on the minimum value of the second transmit power, the third transmit power and the fourth transmit power.

[0215] In some embodiments, the first threshold satisfies: MIN{10log 10 P temp ,P PowerClass –MAX(MAX(MPR,A-MPR)+ΔT IB ,P-MPR),P Regulatory}; The second threshold meets: MIN{10log 10 P temp ,P PowerClass ,P Regulatory}; Among them, 10log 10 P temp represents the second transmission power, P PowerClass Indicates the power determined based on the power class of the terminal device, MPR indicates maximum power reduction, A-MPR indicates additional maximum power reduction, ΔT IB represents additional tolerance, P-MPR represents power management maximum power reduction, P Regulatory Indicates the fourth transmission power.

[0216] In some embodiments, if one or more sidelink transmissions on the first carrier and one or more sidelink transmissions on the second carrier include SSB, the first threshold and / or the second threshold is determined based on a minimum value of the third power and the fourth power.

[0217] In some embodiments, the first threshold satisfies: MIN{P PowerClass –MAX(MAX(MPR,A-MPR)+ΔT IB ,P-MPR),P Regulatory}; The second threshold meets: MIN{P PowerClass ,P Regulatory}; Among them, P PowerClass Indicates the power determined based on the power class of the terminal device, MPR indicates maximum power reduction, A-MPR indicates additional maximum power reduction, ΔT IB represents additional tolerance, P-MPR represents power management maximum power reduction, P Regulatory Indicates the fourth transmission power.

[0218] In some embodiments, the power reduction parameters include one or more of: a maximum power reduction; an additional maximum power reduction; and a power management maximum power reduction.

[0219] In some embodiments, the sum of the transmit powers of the multiple sideline transmissions in the time domain overlapping portion is determined based on the maximum value of the sum of the transmit powers of the multiple sideline transmissions in the time domain overlapping portion.

[0220] In some embodiments, the adjustment unit 1710 is specifically configured to adjust the transmit power of the sidelink transmission according to the sidelink priority corresponding to one or more sidelink transmissions on the first carrier and / or the sidelink priority corresponding to one or more sidelink transmissions on the second carrier.

[0221] In some embodiments, the transmit power of the sideline transmission is adjusted according to the sideline priority corresponding to one or more sideline transmissions on the first carrier and / or the sideline priority corresponding to one or more sideline transmissions on the second carrier, including: adjusting the transmit power of the sideline transmission according to the size relationship between the first value and the second value; wherein the first value is determined according to the minimum value of the sideline priority values ​​corresponding to one or more sideline transmissions on the first carrier, and the second value is determined according to the minimum value of the sideline priority values ​​corresponding to one or more sideline transmissions on the second carrier.

[0222] In some embodiments, the transmit power of the side transmission is adjusted based on the size relationship between the first value and the second value, including one of the following: if the first value is less than the second value, the transmit power of one or more side transmissions on the second carrier is reduced; if the first value is less than or equal to the second value, the transmit power of one or more side transmissions on the second carrier is reduced; if the first value is greater than the second value, the transmit power of one or more side transmissions on the first carrier is reduced; if the first value is greater than or equal to the second value, the transmit power of one or more side transmissions on the first carrier is reduced.

[0223] In some embodiments, the second carrier includes multiple carriers, and the transmission power of the side transmission is adjusted according to the side priority corresponding to one or more side transmissions on the first carrier and / or the side priority corresponding to one or more side transmissions on the second carrier, including: reducing the transmission power of one or more side transmissions in the time domain overlapping part on the target carrier, the target carrier is the carrier with the highest priority value among the first carrier and the multiple carriers, and the priority value associated with the first carrier and the multiple carriers is determined according to the minimum value of the side priority values ​​corresponding to the one or more side transmissions on the corresponding carriers; when the transmission power of one or more side transmissions in the time domain overlapping part on the target carrier is reduced to 0, if the transmission power of the side transmission in the time domain overlapping part of the remaining carriers is greater than the first transmission power, the carrier with the highest priority value among the remaining carriers is used as the target carrier, and the step of reducing the transmission power of one or more side transmissions in the time domain overlapping part on the target carrier is repeated until the transmission power of the side transmission in the time domain overlapping part is less than or equal to the first transmission power.

[0224] In some embodiments, the adjustment unit 1710 is specifically used to: reduce the transmission power of one or more side transmissions in multiple side transmissions in the time domain overlapping part, so that the transmission power of the side transmission in the time domain overlapping part is less than or equal to the first transmission power.

[0225] In some embodiments, reducing the transmission power of one or more side transmissions among multiple side transmissions in the time domain overlapping part includes: reducing the transmission power of a first side transmission, the first side transmission being the side transmission with the highest corresponding side priority value among the side transmissions in the time domain overlapping part; when the transmission power of the first side transmission is reduced to 0, if the transmission power of the remaining side transmissions in the time domain overlapping part is greater than the first transmission power, then the side transmission with the highest corresponding side priority value among the remaining side transmissions is used as the first side transmission, and the step of reducing the transmission power of the first side transmission is repeated until the transmission power of the side transmission in the time domain overlapping part is less than or equal to the first transmission power.

[0226] In some embodiments, reducing the transmission power of one or more side transmissions among multiple side transmissions in the time domain overlapping portion includes: if the number of side transmissions whose transmission power needs to be reduced is M, then reducing the transmission power of the M side transmissions in equal proportion; wherein M is a positive integer greater than 1.

[0227] In some embodiments, the adjustment unit 1710 is specifically used to: if the sideline transmission whose transmission power needs to be adjusted includes N PSFCHs, then adjust the transmission power of the N PSFCHs according to the sideline priorities corresponding to the N PSFCHs; where N is a positive integer greater than or equal to 1.

[0228] In some embodiments, the transmission power of N PSFCHs is adjusted according to the sideline priorities corresponding to the N PSFCHs, including: reducing the transmission power of the first PSFCH, the first PSFCH being the PSFCH with the highest corresponding sideline priority value among the N PSFCHs; when the transmission power of the first PSFCH is reduced to 0, if the transmission power of the remaining sideline transmissions in the time domain overlapping part is greater than the first transmission power, the PSFCH with the highest corresponding sideline priority value among the remaining PSFCHs is used as the first PSFCH, and the step of reducing the transmission power of the first PSFCH is repeated until the transmission power of the sideline transmissions in the time domain overlapping part is less than or equal to the first transmission power.

[0229] In some embodiments, the adjustment unit 1710 is specifically configured to: if the sideline transmission for which the transmit power needs to be adjusted includes N PSFCHs, then proportionally reduce the transmit power of the N PSFCHs; wherein N is a positive integer greater than or equal to 1.

[0230] In some embodiments, one or more sidelink transmissions on the first carrier overlap with one or more sidelink transmissions on the second carrier in the time domain, including: one or more sidelink transmissions on the first carrier overlap with one or more sidelink transmissions on the second carrier in time domain resources within a first time range.

[0231] In some embodiments, the first time range includes one or more of the following: a time range corresponding to one or more time slots; and a time range corresponding to one or more symbols.

[0232] In some embodiments, the first time range is determined based on a subcarrier spacing corresponding to the first carrier and / or the second carrier.

[0233] In some embodiments, the first time range is determined based on the minimum subcarrier spacing corresponding to the first carrier and the second carrier; or, the first time range is determined based on the maximum subcarrier spacing corresponding to the first carrier and the second carrier.

[0234] In some embodiments, the second carrier includes one or more carriers.

[0235] In some embodiments, the one or more sideline transmissions on the second carrier are sideline transmissions on the same carrier; or, the one or more sideline transmissions on the second carrier are sideline transmissions on different carriers.

[0236] In an optional embodiment, the adjusting unit 1710 may be a processor 1810. The terminal device 1700 may further include a memory 1820 and a transceiver 1830, as specifically shown in FIG18 .

[0237] Figure 18 is a schematic block diagram of a communication device according to an embodiment of the present application. The dashed lines in Figure 18 indicate that the unit or module is optional. Device 1800 may be used to implement the method described in the above method embodiment. Device 1800 may be a chip or a terminal device.

[0238] The device 1800 may include one or more processors 1810. The processor 1810 may support the device 1800 to implement the method described in the method embodiment above. The processor 1810 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.

[0239] The apparatus 1800 may further include one or more memories 1820. The memories 1820 store programs that can be executed by the processor 1810, causing the processor 1810 to perform the methods described in the above method embodiments. The memories 1820 may be independent of the processor 1810 or integrated into the processor 1810.

[0240] The apparatus 1800 may further include a transceiver 1830. The processor 1810 may communicate with other devices or chips via the transceiver 1830. For example, the processor 1810 may transmit and receive data with other devices or chips via the transceiver 1830.

[0241] 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 provided in the present application, and the program enables a computer to execute the method performed by the terminal in each embodiment of the present application.

[0242] 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 provided in the present application, and the program causes the computer to execute the method performed by the terminal in each embodiment of the present application.

[0243] The embodiments of the present application also provide a computer program. The computer program can be applied to the terminal provided in the embodiments of the present application, and the computer program enables a computer to execute the method executed by the terminal in each embodiment of the present application.

[0244] 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.

[0245] 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.

[0246] 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.

[0247] 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.

[0248] In the embodiments of the present application, "pre-definition" or "pre-configuration" can be implemented by pre-storing corresponding codes, tables, or other methods that can be used to indicate relevant information in a device (e.g., including a terminal device). This application does not limit the specific implementation method. For example, pre-definition can refer to a definition in a protocol. Pre-configuration can be configured when the device leaves the factory.

[0249] 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.

[0250] 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.

[0251] In the embodiments of this application, the term "include" can refer to direct inclusion or indirect inclusion. Alternatively, the term "include" in the embodiments of this application can be replaced with "indicates" or "is used to determine." For example, "A includes B" can be replaced with "A indicates B" or "A is used to determine B."

[0252] 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.

[0253] 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.

[0254] 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.

[0255] 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.

[0256] 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)).

[0257] 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 sideline communication, characterized in that: include: If the first condition is met, the terminal device adjusts the transmit power of the sideline transmission; The first condition includes one or more of the following: One or more sideline transmissions of the terminal device on the first carrier overlap with one or more sideline transmissions of the terminal device on the second carrier in the time domain; and A sum of transmission powers of multiple side transmissions of a time domain overlapping portion of the first carrier and the second carrier is greater than a first transmission power.

2. The method according to claim 1, characterized in that The first transmit power is determined based on one or more of the following: The maximum transmission power of the terminal device; a maximum output power configured by the resource pool on the first carrier; a maximum transmit power configured by the resource pool on the first carrier; a maximum output power configured by the resource pool on the second carrier; as well as, The maximum transmit power configured in the resource pool on the second carrier.

3. The method according to claim 1 or 2, characterized in that: The first transmission power is greater than or equal to a first threshold; and / or the first transmission power is less than or equal to a second threshold.

4. The method according to claim 3, characterized in that The first threshold and / or the second threshold are determined based on one or more of the following: a second transmit power, determined based on a first parameter of a resource pool configuration on the first carrier and / or the second carrier; a third transmit power, determined based on a power level and / or a power reduction parameter of the terminal device; as well as A fourth transmission power is determined based on regulations; The first parameter is used to indicate the maximum value of the side transmission power of the terminal device in the resource pool.

5. The method according to claim 4, characterized in that The second transmit power is determined based on a sum of linear values ​​corresponding to the first parameter of the resource pool configuration on the first carrier and the second carrier.

6. The method according to claim 4 or 5, characterized in that: If one or more side transmissions on the first carrier or one or more side transmissions on the second carrier include PSSCH and / or PSCCH, the first parameter of the resource pool configuration on the first carrier and / or the second carrier includes: the first parameter of the resource pool configuration where the PSSCH and / or the PSCCH are located.

7. The method according to any one of claims 4 to 6, characterized in that If one or more side transmissions on the first carrier and one or more side transmissions on the second carrier include PSFCH, the first parameter configured for the resource pool on the first carrier and / or the second carrier includes: the first parameter configured for each of the one or more resource pools where the PSFCH is located.

8. The method according to any one of claims 4 to 7, characterized in that If one or more side transmissions on the first carrier and one or more side transmissions on the second carrier include one or more of PSCCH, PSSCH and PSFCH, the first threshold and / or the second threshold is determined based on the minimum value of the second transmit power, the third transmit power and the fourth transmit power.

9. The method according to claim 8, characterized in that The first threshold satisfies: MIN{10 log 10 P temp ,P PowerClass –MAX(MAX(MPR,A-MPR)+ΔT IB ,P-MPR),P Regulatory }; The second threshold satisfies: MIN{10 log 10 P temp ,P PowerClass ,P Regulatory }; Among them, 10 log 10 P temp represents the second transmission power, P PowerClass represents the power determined based on the power class of the terminal device, MPR represents maximum power reduction, A-MPR represents additional maximum power reduction, ΔT IB represents additional tolerance, P-MPR represents power management maximum power reduction, P Regulatory Indicates the fourth transmitting power.

10. The method according to claim 4, characterized in that If one or more sideline transmissions on the first carrier and one or more sideline transmissions on the second carrier include SSB, the first threshold and / or the second threshold is determined based on the minimum value of the third power and the fourth power.

11. The method according to claim 10, characterized in that The first threshold satisfies: MIN{P PowerClass –MAX(MAX(MPR,A-MPR)+ΔT IB ,P-MPR),P Regulatory }; The second threshold satisfies: MIN{P PowerClass ,P Regulatory }; Among them, P PowerClass represents the power determined based on the power class of the terminal device, MPR represents maximum power reduction, A-MPR represents additional maximum power reduction, ΔT IB represents additional tolerance, P-MPR represents power management maximum power reduction, P Regulatory Indicates the fourth transmitting power.

12. The method according to any one of claims 4 to 11, characterized in that: The power reduction parameters include one or more of the following: Maximum power reduction; Additional maximum power reduction; as well as Power Management Maximum Power Reduction.

13. The method according to any one of claims 1 to 12, characterized in that The sum of the transmission powers of the multiple side transmissions in the time domain overlap portion is determined based on the maximum value of the sum of the transmission powers of the multiple side transmissions in the time domain overlap portion.

14. The method according to any one of claims 1 to 13, characterized in that The terminal device adjusts the transmission power of the side transmission, including: The terminal device adjusts the transmission power of the sideline transmission according to the sideline priority corresponding to one or more sideline transmissions on the first carrier and / or the sideline priority corresponding to one or more sideline transmissions on the second carrier.

15. The method according to claim 14, characterized in that The terminal device adjusts the transmission power of the sideline transmission according to the sideline priority corresponding to one or more sideline transmissions on the first carrier and / or the sideline priority corresponding to one or more sideline transmissions on the second carrier, including: The terminal device adjusts the transmission power of the side transmission according to the magnitude relationship between the first value and the second value; The first value is determined according to the minimum value of the sideline priority values ​​corresponding to one or more sideline transmissions on the first carrier, and the second value is determined according to the minimum value of the sideline priority values ​​corresponding to one or more sideline transmissions on the second carrier.

16. The method according to claim 15, characterized in that The terminal device adjusts the transmission power of the side transmission according to the magnitude relationship between the first value and the second value, including one of the following: If the first value is less than the second value, the terminal device reduces the transmit power of the one or more sideline transmissions on the second carrier; If the first value is less than or equal to the second value, the terminal device reduces the transmit power of the one or more sideline transmissions on the second carrier; If the first value is greater than the second value, the terminal device reduces the transmit power of the one or more sideline transmissions on the first carrier; If the first value is greater than or equal to the second value, the terminal device reduces the transmit power of the one or more sideline transmissions on the first carrier.

17. The method according to claim 14, characterized in that The second carrier includes multiple carriers, and the terminal device adjusts the transmission power of the sideline transmission according to the sideline priority corresponding to one or more sideline transmissions on the first carrier and / or the sideline priority corresponding to one or more sideline transmissions on the second carrier, including: The terminal device reduces the transmission power of one or more side transmissions in the time domain overlapping part on the target carrier, the target carrier is the carrier with the highest priority value among the first carrier and the multiple carriers, and the priority value associated with the first carrier and the multiple carriers is determined according to the minimum value of the side priority values ​​corresponding to the one or more side transmissions on the corresponding carriers; In a case where the transmit power of one or more side transmissions in the time domain overlapping part on the target carrier is reduced to 0, if the transmit power of the side transmission in the time domain overlapping part of the remaining carriers is greater than the first transmit power, the terminal device takes the carrier with the highest priority value among the remaining carriers as the target carrier, and repeatedly performs the step of reducing the transmit power of one or more side transmissions in the time domain overlapping part on the target carrier until the transmit power of the side transmission in the time domain overlapping part is less than or equal to the first transmit power.

18. The method according to any one of claims 1 to 17, characterized in that The terminal device adjusts the transmission power of the side transmission, including: The terminal device reduces the transmission power of one or more side transmissions among the multiple side transmissions in the time domain overlapping part, so that the transmission power of the side transmission in the time domain overlapping part is less than or equal to the first transmission power.

19. The method according to claim 18, characterized in that The terminal device reduces the transmission power of one or more side transmissions among the multiple side transmissions in the time domain overlapping part, including: The terminal device reduces the transmission power of the first sideline transmission, where the first sideline transmission is the sideline transmission with the highest corresponding sideline priority value among the sideline transmissions in the time domain overlapping part; In the case where the transmission power of the first sideline transmission is reduced to 0, if the transmission power of the remaining sideline transmissions in the time domain overlapping part is greater than the first transmission power, the terminal device takes the sideline transmission with the highest corresponding sideline priority value among the remaining sideline transmissions as the first sideline transmission, and repeats the step of reducing the transmission power of the first sideline transmission until the transmission power of the sideline transmission in the time domain overlapping part is less than or equal to the first transmission power.

20. The method according to claim 18, characterized in that The terminal device reduces the transmission power of one or more side transmissions among the multiple side transmissions in the time domain overlapping part, including: If the number of side transmissions for which the transmit power needs to be reduced is M, the terminal device proportionally reduces the transmit power of the M side transmissions; Wherein, M is a positive integer greater than 1.

21. The method according to any one of claims 1 to 20, characterized in that The terminal device adjusts the transmission power of the side transmission, including: If the sideline transmission for which the transmit power needs to be adjusted includes N PSFCHs, the terminal device adjusts the transmit power of the N PSFCHs according to the sideline priorities corresponding to the N PSFCHs; Wherein, N is a positive integer greater than or equal to 1.

22. The method according to claim 21, characterized in that The terminal device adjusts the transmission power of the N PSFCHs according to the sideline priorities corresponding to the N PSFCHs, including: The terminal device reduces the transmission power of the first PSFCH, where the first PSFCH is the PSFCH with the highest corresponding sideline priority value among the N PSFCHs; When the transmission power of the first PSFCH is reduced to 0, if the transmission power of the remaining sideline transmission in the time domain overlapping part is greater than the first transmission power, the terminal device uses the PSFCH with the highest corresponding sideline priority value in the remaining PSFCHs as the first PSFCH, and repeats the step of reducing the transmission power of the first PSFCH until the transmission power of the sideline transmission in the time domain overlapping part is less than or equal to the first transmission power.

23. The method according to any one of claims 1 to 22, characterized in that The terminal device adjusts the transmission power of the side transmission, including: If the side transmission for which the transmit power needs to be adjusted includes N PSFCHs, the terminal device proportionally reduces the transmit power of the N PSFCHs; Wherein, N is a positive integer greater than or equal to 1.

24. The method according to any one of claims 1 to 23, characterized in that One or more side transmissions on the first carrier overlap with one or more side transmissions on the second carrier in the time domain, including: one or more side transmissions on the first carrier overlap with one or more side transmissions on the second carrier in time domain resources within a first time range.

25. The method according to claim 24, characterized in that The first time range includes one or more of the following: a time range corresponding to one or more time slots; and The time range corresponding to one or more symbols.

26. The method according to claim 24 or 25, characterized in that The first time range is determined based on a subcarrier spacing corresponding to the first carrier and / or the second carrier.

27. The method according to claim 26, characterized in that The first time range is determined based on a minimum value of subcarrier spacings corresponding to the first carrier and the second carrier; or, The first time range is determined based on a maximum value of subcarrier spacings corresponding to the first carrier and the second carrier.

28. The method according to any one of claims 1 to 27, characterized in that The second carrier includes one or more carriers.

29. The method according to any one of claims 1 to 28, characterized in that The one or more sideline transmissions on the second carrier are sideline transmissions on the same carrier; or, The one or more sidelink transmissions on the second carrier are sidelink transmissions on different carriers.

30. A terminal device, characterized in that: include: an adjusting unit, configured to adjust the transmission power of the sideline transmission if the first condition is satisfied; The first condition includes one or more of the following: One or more sideline transmissions of the terminal device on the first carrier overlap with one or more sideline transmissions of the terminal device on the second carrier in the time domain; and A sum of transmission powers of multiple side transmissions of a time domain overlapping portion of the first carrier and the second carrier is greater than a first transmission power.

31. The terminal device according to claim 30, characterized in that: The first transmit power is determined based on one or more of the following: The maximum transmission power of the terminal device; a maximum output power configured by the resource pool on the first carrier; a maximum transmit power configured by the resource pool on the first carrier; a maximum output power configured by the resource pool on the second carrier; as well as, The maximum transmit power configured in the resource pool on the second carrier.

32. The terminal device according to claim 30 or 31, characterized in that: The first transmission power is greater than or equal to a first threshold; and / or the first transmission power is less than or equal to a second threshold.

33. The terminal device according to claim 32, characterized in that: The first threshold and / or the second threshold are determined based on one or more of the following: a second transmit power, determined based on a first parameter of a resource pool configuration on the first carrier and / or the second carrier; a third transmit power, determined based on a power level and / or a power reduction parameter of the terminal device; as well as A fourth transmission power is determined based on regulations; The first parameter is used to indicate the maximum value of the side transmission power of the terminal device in the resource pool.

34. The terminal device according to claim 33, characterized in that: The second transmit power is determined based on a sum of linear values ​​corresponding to the first parameter of the resource pool configuration on the first carrier and the second carrier.

35. The terminal device according to claim 33 or 34, characterized in that: If one or more side transmissions on the first carrier or one or more side transmissions on the second carrier include PSSCH and / or PSCCH, the first parameter of the resource pool configuration on the first carrier and / or the second carrier includes: the first parameter of the resource pool configuration where the PSSCH and / or the PSCCH are located.

36. The terminal device according to any one of claims 33 to 35, characterized in that: If one or more side transmissions on the first carrier and one or more side transmissions on the second carrier include PSFCH, the first parameter configured for the resource pool on the first carrier and / or the second carrier includes: the first parameter configured for each of the one or more resource pools where the PSFCH is located.

37. The terminal device according to any one of claims 33 to 36, characterized in that: If one or more side transmissions on the first carrier and one or more side transmissions on the second carrier include one or more of PSCCH, PSSCH and PSFCH, the first threshold and / or the second threshold is determined based on the minimum value of the second transmit power, the third transmit power and the fourth transmit power.

38. The terminal device according to claim 37, characterized in that: The first threshold satisfies: MIN{10 log 10 P temp ,P PowerClass –MAX(MAX(MPR,A-MPR)+ΔT IB ,P-MPR),P Regulatory }; The second threshold satisfies: MIN{10 log 10 P temp ,P PowerClass ,P Regulatory }; Among them, 10 log 10 P temp represents the second transmission power, P PowerClass represents the power determined based on the power class of the terminal device, MPR represents maximum power reduction, A-MPR represents additional maximum power reduction, ΔT IB represents additional tolerance, P-MPR represents power management maximum power reduction, P Regulatory Indicates the fourth transmitting power.

39. The terminal device according to claim 33, characterized in that: If one or more sideline transmissions on the first carrier and one or more sideline transmissions on the second carrier include SSB, the first threshold and / or the second threshold is determined based on the minimum value of the third power and the fourth power.

40. The terminal device according to claim 39, characterized in that: The first threshold satisfies: MIN{P PowerClass –MAX(MAX(MPR,A-MPR)+ΔT IB ,P-MPR),P Regulatory }; The second threshold satisfies: MIN{P PowerClass ,P Regulatory }; Among them, P PowerClass represents the power determined based on the power class of the terminal device, MPR represents maximum power reduction, A-MPR represents additional maximum power reduction, ΔT IB represents additional tolerance, P-MPR represents power management maximum power reduction, P Regulatory Indicates the fourth transmitting power.

41. The terminal device according to any one of claims 33 to 40, characterized in that: The power reduction parameters include one or more of the following: Maximum power reduction; Additional maximum power reduction; as well as Power Management Maximum Power Reduction.

42. The terminal device according to any one of claims 30 to 41, characterized in that: The sum of the transmission powers of the multiple side transmissions in the time domain overlap portion is determined based on the maximum value of the sum of the transmission powers of the multiple side transmissions in the time domain overlap portion.

43. The terminal device according to any one of claims 30 to 42, characterized in that: The adjustment unit is specifically used for: The transmission power of the sidelink transmission is adjusted according to the sidelink priority corresponding to one or more sidelink transmissions on the first carrier and / or the sidelink priority corresponding to one or more sidelink transmissions on the second carrier.

44. The terminal device according to claim 43, characterized in that: The adjusting the transmission power of the sideline transmission according to the sideline priorities corresponding to one or more sideline transmissions on the first carrier and / or the sideline priorities corresponding to one or more sideline transmissions on the second carrier includes: Adjusting the transmission power of the side transmission according to the magnitude relationship between the first value and the second value; The first value is the minimum value of the sideline priority values ​​corresponding to one or more sideline transmissions on the first carrier. Determine that the second value is determined according to a minimum value of sidelink priority values ​​corresponding to one or more sidelink transmissions on the second carrier.

45. The terminal device according to claim 44, characterized in that: The adjusting the transmission power of the side transmission according to the magnitude relationship between the first value and the second value includes one of the following: If the first value is less than the second value, reducing the transmit power of the one or more sideline transmissions on the second carrier; If the first value is less than or equal to the second value, reducing the transmit power of the one or more sidelink transmissions on the second carrier; If the first value is greater than the second value, reducing the transmit power of the one or more sideline transmissions on the first carrier; If the first value is greater than or equal to the second value, reducing the transmit power of the one or more sidelink transmissions on the first carrier.

46. ​​The terminal device according to claim 43, characterized in that: The second carrier includes multiple carriers, and adjusting the transmit power of the sideline transmission according to the sideline priorities corresponding to one or more sideline transmissions on the first carrier and / or the sideline priorities corresponding to one or more sideline transmissions on the second carrier includes: reducing the transmission power of one or more side transmissions in the time domain overlapping portion on a target carrier, wherein the target carrier is a carrier having the highest priority value among the first carrier and the multiple carriers, and the priority values ​​associated with the first carrier and the multiple carriers are determined according to the minimum value of the side priority values ​​corresponding to the one or more side transmissions on the corresponding carriers; In a case where the transmit power of one or more side transmissions in the time domain overlapping part on the target carrier is reduced to 0, if the transmit power of the side transmission in the time domain overlapping part of the remaining carriers is greater than the first transmit power, the carrier with the highest priority value among the remaining carriers is used as the target carrier, and the step of reducing the transmit power of one or more side transmissions in the time domain overlapping part on the target carrier is repeated until the transmit power of the side transmission in the time domain overlapping part is less than or equal to the first transmit power.

47. The terminal device according to any one of claims 30 to 46, characterized in that: The adjustment unit is specifically used for: The transmission power of one or more side transmissions among the multiple side transmissions in the time domain overlapping part is reduced so that the transmission power of the side transmission in the time domain overlapping part is less than or equal to the first transmission power.

48. The terminal device according to claim 47, characterized in that: The reducing the transmission power of one or more side transmissions among the multiple side transmissions in the time domain overlapping part comprises: reducing the transmission power of a first side transmission, where the first side transmission is the side transmission having the highest side priority value among the side transmissions in the time domain overlapping portion; In the case where the transmission power of the first side transmission is reduced to 0, if the transmission power of the remaining side transmissions in the time domain overlapping part is greater than the first transmission power, the side transmission with the highest corresponding side priority value among the remaining side transmissions is used as the first side transmission, and the step of reducing the transmission power of the first side transmission is repeated until the transmission power of the side transmission in the time domain overlapping part is less than or equal to the first transmission power.

49. The terminal device according to claim 47, characterized in that: The reducing the transmission power of one or more side transmissions among the multiple side transmissions in the time domain overlapping part comprises: If the number of side transmissions for which the transmit power needs to be reduced is M, the transmit power of the M side transmissions is reduced in equal proportion; Wherein, M is a positive integer greater than 1.

50. The terminal device according to any one of claims 30 to 49, characterized in that: The adjustment unit is specifically used for: If the sideline transmission for which the transmit power needs to be adjusted includes N PSFCHs, adjusting the transmit power of the N PSFCHs according to the sideline priorities corresponding to the N PSFCHs; Wherein, N is a positive integer greater than or equal to 1.

51. The terminal device according to claim 50, characterized in that: The adjusting the transmission power of the N PSFCHs according to the sideline priorities corresponding to the N PSFCHs includes: reducing the transmission power of a first PSFCH, where the first PSFCH is a PSFCH having a highest corresponding sideline priority value among the N PSFCHs; When the transmission power of the first PSFCH is reduced to 0, if the transmission power of the remaining sideline transmission in the time domain overlapping part is greater than the first transmission power, the PSFCH with the highest corresponding sideline priority value in the remaining PSFCHs is used as the first PSFCH, and the step of reducing the transmission power of the first PSFCH is repeated until the transmission power of the sideline transmission in the time domain overlapping part is less than or equal to the first transmission power.

52. The terminal device according to any one of claims 30 to 51, characterized in that: The adjustment unit is specifically used for: If the side transmission for which the transmit power needs to be adjusted includes N PSFCHs, the transmit power of the N PSFCHs is reduced in equal proportion; Wherein, N is a positive integer greater than or equal to 1.

53. The terminal device according to any one of claims 30 to 52, characterized in that: One or more side transmissions on the first carrier overlap with one or more side transmissions on the second carrier in the time domain, including: one or more side transmissions on the first carrier overlap with one or more side transmissions on the second carrier in time domain resources within a first time range.

54. The terminal device according to claim 53, characterized in that: The first time range includes one or more of the following: a time range corresponding to one or more time slots; and The time range corresponding to one or more symbols.

55. The terminal device according to claim 53 or 54, characterized in that: The first time range is determined based on a subcarrier spacing corresponding to the first carrier and / or the second carrier.

56. The terminal device according to claim 55, characterized in that: The first time range is determined based on a minimum value of subcarrier spacings corresponding to the first carrier and the second carrier; or, The first time range is determined based on a maximum value of subcarrier spacings corresponding to the first carrier and the second carrier.

57. The terminal device according to any one of claims 30 to 56, characterized in that: The second carrier includes one or more carriers.

58. The terminal device according to any one of claims 30 to 57, characterized in that: The one or more sideline transmissions on the second carrier are sideline transmissions on the same carrier; or, The one or more sidelink transmissions on the second carrier are sidelink transmissions on different carriers.

59. A terminal device, characterized in that: The method comprises a memory and a processor, wherein the memory is used to store a program, and the processor is used to call the program in the memory so that the terminal device executes the method as described in any one of claims 1 to 29.

60. A device, characterized in that The device comprises a processor, configured to call a program from a memory so as to enable the device to execute the method as claimed in any one of claims 1 to 29.

61. 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 claimed in any one of claims 1 to 29.

62. 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 29.

63. 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 29.

64. A computer program, characterized in that The computer program enables a computer to execute the method according to any one of claims 1 to 29.

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