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

Methods and terminal devices for side-by-side communication Technical Field

[0001] This application relates to the field of communication technology, and more specifically, to a method and terminal device for side-to-side communication. Background Technology

[0002] Side-line systems can support side-line transmission using multiple carriers, thereby improving system transmission rate or reliability. During side-line transmission, terminal devices can select carriers. 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 in higher layers. In side-line multi-carrier technology, terminal devices can support one or more techniques such as carrier aggregation and packet duplication. How to implement power control in side-line multi-carrier technology is a problem that urgently needs to be solved.

[0003] Summary of the Invention

[0004] This application provides a method and terminal device for side-by-side communication. The various aspects covered in this application are described below.

[0005] In a first aspect, a method for side-link communication is provided, the method comprising: if a first condition is satisfied, a terminal device adjusting the transmission power of the side-link transmission; wherein the first condition includes one or more of the following: one or more side-link transmissions of the terminal device on a first carrier overlap with one or more side-link transmissions of the terminal device on a second carrier in the time domain; and the sum of the transmission powers of the plurality of side-link transmissions in the time-domain overlap portion of the first carrier and the second carrier is greater than a first transmission power.

[0006] In a second aspect, a terminal device is provided, comprising: an adjustment unit for adjusting the transmission power of a sideline transmission if a first condition is met; wherein the first condition includes one or more of the following: one or more sideline transmissions of the terminal device on a first carrier overlap with one or more sideline transmissions of the terminal device on a second carrier in the time domain; and the sum of the transmission powers of the plurality of sideline transmissions in the time-domain overlap portion of the first carrier and the second carrier is greater than a first transmission power.

[0007] Thirdly, a terminal device is provided, including a processor and a memory, the memory being used to store one or more computer programs, the processor being used to invoke the computer programs in the memory to cause the terminal device to perform some or all of the steps in the method of the first aspect.

[0008] Fourthly, embodiments of this application provide a communication system that includes the aforementioned terminal device. In another possible design, the system may further include other devices that interact with the terminal device as described in the embodiments of this application.

[0009] Fifthly, embodiments of this application provide a computer-readable storage medium storing a computer program that causes a terminal device to perform some or all of the steps in the methods described above.

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

[0011] In a seventh aspect, embodiments of this application provide a chip including a memory and a processor, the processor being able to 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 this application, during multi-carrier side-link communication, the terminal device can perform power control based on a first condition, thereby avoiding problems such as abnormal transmission power of multiple carriers during side-link transmission, and thus avoiding abnormalities in multi-carrier side-link communication. Attached Figure Description

[0013] Figure 1 is a system architecture example diagram of a wireless communication system applicable to embodiments of this application.

[0014] Figure 2 shows an example of a side-to-side communication scenario within network coverage.

[0015] Figure 3 shows an example of a side-by-side communication scenario with partial network coverage.

[0016] Figure 4 shows an example of a scenario for side-to-side communication outside network coverage.

[0017] Figure 5 shows a scenario example of side-by-side communication based on a central control node.

[0018] Figure 6 is an example diagram of a broadcast-based side-by-side communication method.

[0019] Figure 7 is an example diagram of a unicast-based side-by-side communication method.

[0020] Figure 8 is an example diagram of a multicast-based side-by-side communication method.

[0021] Figure 9A is an example diagram of the time slot structure used in a side-by-side communication system.

[0022] Figure 9B is another example diagram of the time slot structure used in a side-by-side communication system.

[0023] Figure 10 is a schematic flowchart of a method for side-to-side communication provided in an embodiment of this application.

[0024] Figure 11 is an example diagram of a scenario applicable to the embodiments of this application.

[0025] Figure 12 is an example diagram of another scenario to which the embodiments of this application are applicable.

[0026] Figure 13 is an example diagram of another scenario to which the embodiments of this application are applicable.

[0027] Figure 14 is an example diagram of another scenario to which the embodiments of this application are applicable.

[0028] Figure 15 is an example diagram of another scenario to which the embodiments of this application are applicable.

[0029] Figure 16 is an example diagram of another scenario to which the embodiments of this application are applicable.

[0030] Figure 17 is a schematic structural diagram of a terminal device provided in an embodiment of this application.

[0031] Figure 18 is a schematic structural diagram of a communication device provided in an embodiment of this application. Detailed Implementation

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

[0033] Communication system architecture

[0034] Figure 1 is a system architecture example diagram of a wireless communication system 100 to which embodiments of this application can 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 geographical area and may communicate with the terminal device 120 located within that coverage area.

[0035] Figure 1 exemplarily illustrates 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 area of ​​the network device 110, or all may be located outside the network coverage area of ​​the network device 110, or some may be located within the coverage area of ​​the network device 110 and others outside the network coverage area. This embodiment of the application does not limit this.

[0036] Optionally, the wireless communication system 100 may also include other network entities such as a network controller and a mobility management entity, which is not limited in this embodiment.

[0037] It should be understood that the technical solutions of the embodiments of this application can be applied to various communication systems, such as: 5th generation (5G) systems or new radio (NR), long term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD) systems, etc. The technical solutions provided in this application can also be applied to future communication systems, such as 6th generation mobile communication systems, satellite communication systems, and so on.

[0038] The terminal device in this application embodiment can 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 this application embodiment can 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 handheld devices with wireless connectivity, in-vehicle devices, etc. The terminal device in this application embodiment can be a mobile phone, tablet computer, laptop computer, PDA, mobile internet device (MID), wearable device, vehicle, wireless terminal in industrial control, wireless terminal in self-driving, wireless terminal in remote medical surgery, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, etc. For example, the terminal device can act as a dispatching entity, providing sidelink signaling between terminal devices in vehicle-to-everything (V2X) or device-to-device (D2D) communications. For instance, cellular phones and cars communicate with each other using sidelink signals. Cellular phones and smart home devices communicate without relaying communication signals through base stations. Optionally, the terminal device can be used to act as a base station.

[0039] The network device in this application embodiment can be a device for communicating with a terminal device. This network device can also be called an access network device or a wireless access network device, such as a base station. In this application embodiment, the network device can refer to a radio access network (RAN) node (or device) that connects the terminal device to the wireless network. A base station can broadly encompass, or be replaced by, various names including: NodeB, evolved NodeB (eNB), next-generation NodeB (gNB), relay station, access point, transmitting and receiving point (TRP), transmitting point (TP), master MeNB, auxiliary SeNB, multi-mode 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 can be a macro base station, micro base station, relay node, donor node, or similar entities, or combinations thereof. A base station can also refer to a communication module, modem, or chip installed within the aforementioned equipment or apparatus. A base station can also be a mobile switching center, a device that performs base station functions in device-to-device (D2D), V2X, and 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. Base stations can support networks using the same or different access technologies. The embodiments of this application do not limit the specific technologies or device forms used in the network equipment.

[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 depending on the location of the mobile base station. In other examples, a helicopter or drone can be configured as a device to communicate with another base station.

[0041] In some deployments, the network device in this application embodiment may refer to a CU or a DU, or the network device may include both a CU and a DU. The gNB may also include an AAU.

[0042] Network devices and terminal devices can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; and they can also be deployed in the air on airplanes, balloons, and satellites. This application does not limit the scenario in which the network devices and terminal devices are located.

[0043] Side-to-side communication under different network coverage conditions

[0044] Sidelink communication refers to communication technology based on sidelinks (SL, also known as direct links). Examples of sidelink communication include device-to-device (D2D) and vehicle-to-everything (V2X) communication. In traditional cellular systems, data transmission occurs between terminal devices and network devices, while sidelink communication supports direct data transmission between terminal devices. Compared to traditional cellular communication, direct data transmission between terminal devices offers higher spectral efficiency and lower latency. For example, V2X systems utilize sidelink communication technology.

[0045] In side-by-side communication, depending on the network coverage of the terminal device, side-by-side communication can be divided into side-by-side communication within network coverage, side-by-side communication with partial network coverage, and side-by-side communication outside network coverage.

[0046] Figure 2 illustrates a scenario of lateral communication within network coverage. In the scenario shown in Figure 2, both terminal devices 120a are within the coverage area 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 with configuration information), and determine the lateral configuration based on the configuration signaling from network device 110. After both terminal devices 120a have performed lateral configuration, lateral communication can be performed on the lateral link.

[0047] Figure 3 illustrates a scenario of sidelink communication within partial network coverage. In the scenario shown in Figure 3, terminal device 120a and terminal device 120b engage in sidelink communication. Terminal device 120a is located within the coverage area of ​​network device 110, therefore it can receive configuration signaling from network device 110 and determine its sidelink configuration based on this signaling. Terminal device 120b is located outside the network coverage area and cannot receive configuration signaling from network device 110. In this case, terminal device 120b can determine its sidelink configuration based on pre-configuration information and / or information carried in the physical sidelink broadcast channel (PSBCH) sent by terminal device 120a, which is located within the network coverage area. After both terminal devices 120a and 120b have performed sidelink configuration, sidelink communication can then commence on the sidelink link.

[0048] Figure 4 illustrates a scenario of lateral communication outside network coverage. In the scenario shown in Figure 4, both terminal devices 120b are located outside network coverage. In this case, both terminal devices 120b can determine their lateral configuration based on pre-configuration information. After both terminal devices 120b have performed lateral configuration, lateral communication can be performed on the lateral link.

[0049] Side-by-side communication based on the central control node

[0050] Figure 5 illustrates a scenario of side-link communication based on a central control node. In this side-link communication scenario, multiple terminal devices can form a communication group, and this communication group has a central control node. The central control node can be a terminal device within the communication group (terminal device 1 in Figure 5), which can also be called a cluster header (CH) terminal device. The central control node can be responsible for performing one or more of the following functions: establishing the communication group, allowing members to join and leave the communication group, coordinating resources within the communication group, allocating side-link transmission resources to other terminal devices, receiving side-link feedback information from other terminal devices, and coordinating resources with other communication groups.

[0051] Side-line communication mode

[0052] Some standards or protocols (such as the 3rd generation partnership project (3GPP)) define two modes of side-by-side communication: mode 1 and mode 2.

[0053] In the first mode, the resources of the terminal device (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 transmit data on the sidelink according to the resources allocated by the network device. The network device can allocate resources for a single transmission or for semi-static transmission to the terminal device. This first mode can be applied to scenarios covered by network devices, such as the scenario shown in Figure 2 above. In the scenario shown in Figure 2, the terminal device 120a is located within the network coverage area of ​​the network device 110, therefore the network device 110 can allocate resources used in the sidelink transmission process for the terminal device 120a.

[0054] In the second mode, the terminal device can autonomously select one or more resources from the resource pool (RP). Then, the terminal device can perform side-going transmission based on the selected resources. For example, in the scenario shown in Figure 4, terminal device 120b is located outside the cell coverage area. Therefore, terminal device 120b can autonomously select resources from the pre-configured resource pool for side-going transmission. Alternatively, in the scenario shown in Figure 2, terminal device 120a can also autonomously select one or more resources from the resource pool configured by network device 110 for side-going transmission.

[0055] Data transmission method of side-by-side communication

[0056] Some lateral 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 surrounding the sending terminal. Taking Figure 6 as an example, terminal device 1 is the sending terminal, and the corresponding receiving terminal is any terminal device surrounding terminal device 1, such as terminal device 2 through 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) aims to support autonomous driving. Autonomous driving places higher demands on data interaction between vehicles. For example, data interaction between vehicles requires higher throughput, lower latency, higher reliability, wider coverage, and more flexible resource allocation. Therefore, to improve the performance of data interaction between vehicles, NR-V2X introduces unicast and multicast transmission.

[0058] For unicast transmission, the receiving terminal typically has only one terminal device. Taking Figure 7 as an example, unicast transmission occurs between terminal device 1 and terminal device 2. Terminal device 1 can be the sending terminal and terminal device 2 can be the receiving terminal, or terminal device 1 can be the receiving terminal and terminal device 2 can be the sending terminal.

[0059] For multicast transmission, the receiving terminal can be a terminal device within a communication group, or it can be a terminal device within a certain transmission distance. Taking Figure 8 as an example, terminal device 1, terminal device 2, terminal device 3, and terminal device 4 constitute a communication group. If terminal device 1 sends data, then the other terminal devices in the group (terminal devices 2 to 4) can all be receiving terminals.

[0060] Time slot structure of side-line communication

[0061] Communication systems can define the 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 these two time slot structures does not include the physical sidelink feedback channel (PSFCH), see Figure 9A; the other of these two time slot structures does include the PSFCH, see Figure 9B.

[0062] In NR SL, the physical sidelink control channel (PSCCH) can start in the time domain with the second sidelink symbol of the time slot, and the PSCCH can occupy 2 or 3 symbols in the time domain (the symbols mentioned here 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 equipment, typically only one number of symbols and PRBs are configured for PSCCH within a resource pool. Furthermore, since NR SL uses sub-channels as the smallest granularity for allocating physical sidelink shared channel (PSSCH) resources, the number of PRBs occupied by PSCCH must be less than or equal to the number of PRBs contained in a single sub-channel within the resource pool.

[0064] Referring to Figure 9A, for a time slot structure excluding the PSSCH, the PSSCH in NR SL can start in the time domain with the second sideline symbol of that time slot. The last sideline symbol in that time slot is used as the guard period (GP), and the remaining symbols can be mapped to the PSSCH. The first sideline symbol in that time slot can be a repetition of the second sideline symbol. Typically, the receiving terminal device will use the first sideline symbol as the symbol for automatic gain control (AGC). Therefore, the data on the first sideline symbol is usually not used for data demodulation. The PSSCH can occupy K sub-channels in the frequency domain, and each sub-channel can include P consecutive PRBs (the values ​​of K and P can be predefined or preconfigured by the protocol, configured by the network device, or depend on the implementation of the terminal device).

[0065] Figure 9B illustrates the time slot structure including PSFCH, schematically showing the symbol positions of PSFCH, PSCCH, and PSSCH within a time slot. The main difference between this time slot structure and Figure 9A is that the penultimate and third-to-last symbols in the time slot are used for PSFCH transmission. Additionally, the symbol preceding the one used for PSFCH transmission is also used as the GP. As can be seen from the time slot structure shown in Figure 9B, in a time slot, the last symbol is used as the GP, the penultimate symbol is used for PSFCH transmission, the data on the third-to-last symbol is the same as the data on the penultimate symbol used for PSFCH transmission, and the third-to-last symbol is typically used as the AGC symbol. The fourth-to-last symbol has the same function as the last symbol and is also used as the GP. Furthermore, the first symbol in the 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. PSCCH occupies 3 symbols, and the remaining symbols can be used for PSSCH transmission.

[0066] Side link 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 PSSCH and PSCCH transmission in unicast scenarios, three power control methods are supported: power control based solely on downlink path loss, power control based solely on sidelink path loss, and power control based on both downlink and sidelink path loss. The specific power control method used for PSSCH and PSCCH can be determined by the higher layer (RRC layer) configuration. For example, if the higher layer only configures the basic operating point P for power control based on sidelink path loss... 0,SLThis indicates that power control is based solely on downlink path loss; if the upper layers only configure a basic operating point P for power control based on downlink path loss... 0,D This indicates that power control is based solely on downlink path loss; if P is configured at higher layers... 0,SL and P 0,D This indicates that power control is performed based on downlink path loss and side downlink 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 at the sending end does not obtain downlink path loss information, open-loop power control based on downlink path loss is only supported.

[0069] PSSCH / PSCCH power control

[0070] The transmit power of PSSCH on symbols that only include PSSCH can be determined in the following way:

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

[0072] Otherwise, the PSSCH transmission 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 P represents the configured maximum transmit power. MAX_CBR P represents the maximum sideline transmit power determined by transmission priority and channel busy ratio (CBR) level under congestion control configured by higher layers. PSSCH,D and P PSSCH,SL These represent the transmission power determined based on downlink path loss and the transmission power determined based on side downlink path loss, respectively.

[0074] P PSSCH,D and P PSSCH,SL They are determined using the following formulas respectively:

[0075] In the above formula, P 0,D / P0,SL These represent the basic operating points of transmit power based on downlink / side-link path loss power control in the higher-layer configuration. α D / α SL This indicates the downlink / side traverse link path loss compensation factor configured by the higher layers. If the higher layers do not configure α... D / α SL , then α D / α SL The value of PL can be 1. D / PL SL This represents the estimated downlink / side link loss of the terminal device. This indicates the number of PRBs occupied by PSSCH on symbols that do not carry PSCCH.

[0076] It should be noted that if the high-level configuration only includes P... 0,D P was not configured. 0, SL indicates that power control is based solely on downlink path loss. In this case, min(P) PSSCH,D ,P PSSCH,SL ) = P PSSCH,D If the upper level only configures P 0,SL P was not configured. 0,D This indicates that power control is based solely on the side link path loss. In this case, min(P) PSSCH,D ,P PSSCH,SL ) = P PSSCH,SL If the higher-level configuration includes P... 0,SL and P 0,D This indicates that power control is performed simultaneously based on downlink path loss and side downlink path loss.

[0077] For symbols that include both PSCCH and PSSCH, the terminal equipment can transmit the total power P. PSSCH The PRBs of PSCCH and PSSCH are allocated to PSCCH and PSSCH respectively according to their respective proportions.

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

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

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

[0081] PSFCH transmission 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 side-link path loss. The NR SL system allows terminal devices to transmit multiple PSFCHs on a single symbol, and the maximum transmit power of the terminal device can be evenly distributed among these multiple PSFCHs. Furthermore, in the NR SL system, the maximum number of PSFCHs that a terminal device is allowed to transmit simultaneously does not exceed the maximum number of PSFCHs N configured by the higher layers. max,PSFCH The terminal device can determine the number N of PSFCHs to be transmitted based on the number of PSCCH / PSSCHs that need to be used for side-line feedback received in the multiple PSSCH slots corresponding to the PSFCH slot. sch,Tx,PSFCH Furthermore, the terminal device can be based on N 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 transmission power of each PSFCH and the actual number N of PSFCHs 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 each PSFCH does not exceed the configured maximum transmit power P. CMAX If N Tx,PSFCH The total transmit power of each PSFCH exceeds P CMAX If the terminal device determines the number of PSFCHs to send based on the PSFCH priority, then the terminal device will redetermine the number of PSFCHs to send. However, the number of PSFCHs determined by the terminal device will not be lower than a lower limit, so that the transmission power of each PSFCH is less than or equal to P. PSCFH,one .

[0084] P PSFCH,one The following formula can be used to determine it:

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

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

[0087] S-SSB Transmit Power

[0088] An S-SSB can consist of three parts: a sidelink secondary synchronization signal (S-SSS), a sidelink primary synchronization signal (S-PSS), and a physical sidelink broadcast channel (PSBCH). The transmit power of these three parts in the time domain is usually consistent to avoid AGC issues. S-SSB power control can be performed based on downlink path loss. When S-SSB power control is performed based on downlink path loss, the transmit power of the S-SSB satisfies the following formula:

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

[0090] Side-line systems can support side-line transmission using multiple carriers, thereby improving system transmission rate or reliability. During side-line transmission, terminal devices can select carriers. For example, the terminal device can determine the carrier corresponding to the data to be transmitted based on the correspondence between service types configured at higher layers and carriers. In side-line multi-carrier technology, terminal devices can support one or more techniques such as carrier aggregation and packet duplication. How to achieve power control in side-line multi-carrier technology is a technical problem that urgently needs to be solved.

[0091] Figure 10 is a schematic flowchart of a method for side-by-side communication provided in an embodiment of this application. The method shown in Figure 10 can be implemented by a terminal device. The method shown in Figure 10 may include step S1010.

[0092] In step S1010, if the first condition is met, the terminal device adjusts the transmission power of the side-line 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 will be explained first below.

[0094] The terminal device can perform multi-carrier side-pass transmission using a first carrier and a second carrier. The second carrier may include one or more carriers. When the second carrier includes one carrier, the terminal device can perform two-carrier side-pass transmission using the first carrier and another carrier different from the first carrier. When the second carrier includes multiple carriers, the terminal device can perform multi-carrier side-pass transmission using the first carrier and multiple carriers (more than two carriers).

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

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

[0097] For the time slot structure, each carrier can be configured with PSSCH and / or PSFCH transmission resources through a resource pool, thus making the time slot structure different for different carriers. For example, the time slot structure corresponding to the first carrier can be shown in Figure 9A, and the time slot structure corresponding to the second carrier can be shown in Figure 9B.

[0098] It should be noted that when the second carrier comprises multiple carriers, the different configurations of the first and second carriers can include: some or all of the carriers in the first and second carriers having different configurations. Specifically, if multiple carriers in the second carrier have configurations different from the first carrier, these multiple carriers can have the same or different configurations. For example, some carriers in the first and second carriers may have the same subcarrier spacing, while other carriers in the first and second carriers may have different subcarrier spacing. Alternatively, all carriers in the first and second carriers may have different subcarrier spacing.

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

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

[0101] Taking 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. Therefore, the subcarrier spacing of the first carrier and the second carrier is different.

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

[0103] Continuing with the example in Figure 11, during the PSFCH transmission opportunity of carrier 1, the terminal device needs to transmit 4 PSFCHs simultaneously (the number of PSFCHs transmitted is not shown in the figure); during the PSFCH transmission opportunity of the first time slot of carrier 3, the terminal device needs to transmit 2 PSFCHs; and during 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 when the second carrier includes multiple carriers, one or more side-transmissions on the second carrier can be on the same carrier or on different carriers.

[0105] Referring again to Figure 11. For example, if the first carrier is carrier 0, then the side-channel transmission on the first carrier may include PSSCH transmission; if the second carrier is carrier 1, one or more transmissions on the second carrier may include PSSCH transmission and PSFCH transmission on carrier 1. As another example, if the first carrier is carrier 0, then the transmission on the first carrier may include PSSCH transmission; if the second carrier includes carrier 2 and carrier 3, then one or more transmissions on the second carrier may include PSSCH transmission in the first time slot on carrier 2, and PSSCH transmission and 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 sideline transmissions of the terminal device on a first carrier overlap with one or more sideline transmissions of the terminal device on a second carrier in the time domain; and the sum of the transmission powers of the multiple sideline transmissions in the time-domain overlap portion of the first carrier and the second carrier is greater than (or exceeds) the first transmission power.

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

[0108] The overlap in the time domain between one or more sideline transmissions of a terminal device on a first carrier and one or more sideline transmissions of a terminal device on a second carrier can mean that at the same time, 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, overlap can refer to the overlap of the first resource and the second resource in the time domain.

[0109] It should be noted that the overlap described in this article can include complete overlap and partial overlap, meaning that the first resource and the second resource can completely overlap or partially overlap. Complete overlap of the first resource and the second resource can mean that the starting positions and time-domain resource lengths of the first resource and the second resource are exactly the same. Partial overlap of the first resource and the second resource can mean that the time-domain resources of the first resource and the second resource overlap, but one or more of the following are different: starting position, time-domain resource length.

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

[0111] Continuing with Figure 11 as an example, we can illustrate the partial or complete overlap of time-domain resources in side-transmission. As shown in Figure 11, the PSSCH resources of carrier 0 partially overlap with those of carrier 1 and PSFCH resources; the PSSCH resources of carrier 0 partially overlap with those of the first time slot of carrier 2; the PSSCH resources of carrier 0 partially overlap with those of the second time slot of carrier 2; the PSSCH resources of the first time slot of carrier 3 completely overlap with those of the first time slot of carrier 4; the PSFCH resources of the first time slot of carrier 3 completely overlap with those of the first time slot of carrier 4; the PSFCH resources of carrier 1 partially overlap with those of the second time slot of carrier 2; and the PSFCH resources of carrier 1 partially overlap with those of the second time slot of carrier 3.

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

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

[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 may be determined based on the minimum value of the subcarrier spacing corresponding to the first carrier and the second carrier. Alternatively, the first time range may be determined based on the maximum value of the 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 15 kHz. The subcarrier spacing of carrier 2 is 30 kHz. In Figure 12, the first time range may, for example, correspond to or include one time slot (14 symbols) corresponding to carrier 1, i.e., 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, i.e., half a time slot (7 symbols) corresponding to carrier 1. The following explanation uses the duration of one time slot corresponding to the minimum subcarrier spacing (15 kHz) of the first and second carriers as an example to illustrate the first time range.

[0116] As shown in Figure 12, within the first time range (one 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, wherein 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 (denoted as PSSCH2) of the first time slot and the PSSCH (denoted as PSSCH3) of the second time slot 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 transmission power, the terminal device can determine whether to adjust the transmission power of the sideline transmission. In other words, the first transmission power can be the threshold for determining whether to adjust the transmission power in multi-carrier sideline communication. The method for determining the first transmission power will be explained below, and will not be repeated here.

[0118] Based on the first condition, in the case of multi-carrier side-link transmission, if the sum of the transmission powers of multiple side-link transmissions in the time-domain overlap of the first and second resources and / or the time-domain overlap portion is greater than the first transmission power, the terminal device can adjust the transmission power of the side-link transmission. Therefore, based on this application, in the process of multi-carrier side-link communication, the terminal device can perform power control based on the first condition, thereby avoiding abnormal transmission power on multiple carriers during side-link transmission, and thus avoiding abnormalities in multi-carrier side-link communication.

[0119] The first transmission power is explained below.

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

[0121] In some implementations, the first transmission power can be determined based on the maximum transmission power of the terminal device; for example, the first transmission power can be equal to the maximum transmission power of the terminal device. Alternatively, the first transmission power can be equal to the result of a calculation of the maximum transmission power of the terminal device.

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

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

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

[0125] Both the first and second thresholds can be determined based on one or more of the following: the second transmission power, the third transmission power, and the fourth transmission power. These will be explained below.

[0126] Second transmission power

[0127] The second transmission power can be determined based on a first parameter configured on the resource pool of the first carrier and / or the second carrier.

[0128] In some embodiments, the second transmit power can be determined based on the sum of linear values ​​corresponding to all or part of the first parameters configured for the resource pool on the first and second carriers. For example, the second transmit power can be determined based on the sum of linear values ​​corresponding to the first parameters configured for the resource pool on all carriers in the first and second carriers. This sum can be, for example, determined by P. temp This means that P... temp This 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 sideline transmissions on a first carrier or one or more sideline transmissions on a second carrier include PSSCH and / or PSCCH, then the first parameter of the resource pool configuration on the first and / or second carriers may include the first parameter of the resource pool configuration where the PSSCH and / or PSCCH reside. It is understood that only one PSCCH and / or one PSSCH can be transmitted simultaneously on the same carrier. That is, multiple PSCCHs cannot be transmitted simultaneously on the same carrier, or multiple PSSCHs cannot be transmitted simultaneously on the same carrier. Therefore, the second transmission power can be determined based on the first parameter of the resource pool configuration where the PSSCH or PSCCH resides. Alternatively, when transmitting both PSSCH and PSCCH simultaneously, the second transmission power can be determined based on the first parameter of the resource pool configuration where the PSSCH and PSCCH reside.

[0130] Based on this, for PSSCH and / or PSCCH, one carrier can correspond to one first parameter. Calculate P temp In this case, the summation can be based on the number of carriers to which the PSSCH and / or PSCCH belong. For example, if one or more sideline transmissions on the first carrier or one or more sideline transmissions on the second carrier are both PSSCH and / or PSCCH, then P... temp It can satisfy P temp =∑ c P FMAX,c,r Among them, P EMAX,c,r The linear value corresponding to the first parameter configured based on the resource pool r where the PSSCH or PSCCH is located on carrier c is determined.

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

[0132] On the same carrier, when only one resource pool is transmitting the PSFCH, the second transmit power can be determined based on the first parameter configured for the resource pool containing the PSFCH. That is, calculating P... temp In this case, the summation can be based on the number of carriers to which the PSFCH belongs. For example, if one or more sideline transmissions on the first carrier or one or more sideline transmissions on the second carrier are all PSFCHs, and only one resource pool transmits PSFCHs on the same carrier, then P... temp It can satisfy P temp =∑ c P EMAX,c,r Among them, P EMAX,c,r The linear value corresponding to the first parameter configured based on the resource pool r where the PSFCH is located on carrier c is determined.

[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 containing the PSFCH. That is, calculating P... temp In this case, the sum can be calculated based on the number of carriers to which the PSFCH belongs and the number of resource pools where the PSFCH resides on the corresponding carrier. For example, if one or more sideline transmissions on the first carrier or one or more sideline transmissions on the second carrier are PSFCHs, then P... temp It can satisfy P temp =∑ c ∑ r P EMAX,c,r .

[0134] It should be noted that the methods described above for determining the second transmission power can be implemented in combination. For example, 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 It can satisfy P temp =∑ c1 P EMAX,c1,r1 +∑ c2 ∑ r2 P EMAX,c2,r2 Resource pool r1 on carrier c1 is used to transmit PSCCH and / or PSSCH. Resource pool r2 on carrier c2 is used to transmit PSFCH. EMAX,c1,r1 The linear value corresponding to the first parameter configured on carrier c1 and resource pool r1 is determined. P EMAX,c2,r2The linear value corresponding to the first parameter configured for resource pool r2 on carrier c2 is determined. ∑ c1 P EMAX,c1,r1 This represents the summation of the first parameter configured for the resource pool containing the PSSCH or PSCCH on all carriers transmitting the PSSCH or PSCCH. c2 ∑ c2 P EMAX,c2,r2 This represents the summation of the first parameter of the resource pool configuration for all carriers transmitting PSFCH.

[0135] Third transmission power

[0136] The third transmission power can be determined based on the power level and / or power reduction parameters of the terminal equipment.

[0137] Based on the power level, the power P of the power level can be determined. PowerClass Based on P PowerClass The third transmission power can be determined. For example, for power level 3, P PowerClass It can reach 23dBm. For power rating 2, P PowerClass It can reach 26dBm. P 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] Power reduction parameters can include one or more of the following: maximum power reduction (MPR), additional maximum power reduction (A-MPR), and power management maximum power reduction. MPR can be determined based on the maximum power reduction allowed by the end device. A-MPR can be determined based on the additional maximum power reduction allowed by the end device.

[0139] The third transmission power can also be determined based on other information. This other information may include, for example, additional tolerance. The additional tolerance can be determined using ΔT. IB express.

[0140] The third transmission power can be calculated in different ways depending on the threshold. For example, for the first threshold, the third transmission power can be calculated using formula P. PowerClass –MAX(MAX(MPR,A-MPR)+ΔT IB The P-MPR is determined. For example, for the second threshold, the third transmit power can be P. PowerClassMAX(A,B) represents taking the maximum value of A and B.

[0141] Fourth transmission power

[0142] The fourth transmission power can be determined based on regulations. For ease of description, it will be referred to as P below. Regulatory This indicates the fourth transmission power.

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

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

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

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

[0147] As mentioned above, the first condition may include: the sum of the transmit powers of multiple side-line transmissions in the time-domain overlap region of the first carrier and the second carrier is greater than the first transmit power. Optionally, the sum of the transmit powers of multiple side-line transmissions in the time-domain overlap region may be determined based on the maximum value of the sum of the transmit powers of multiple side-line transmissions in the time-domain overlap region. The explanation continues with Figure 12 as an example.

[0148] In Figure 12, the transmission power of PSSCH1 is P1, the transmission power of PSSCH2 is P2, the transmission power of PSSCH3 is P3, and the sum of the transmission powers of PSFCH transmission is P4. Specifically, in the time-domain overlap region of PSSCH1 and PSSCH2, the sum of the transmission powers is P1 + P2; in the time-domain overlap region of PSSCH1 and PSSCH3, the sum of the transmission powers is P1 + P3; and in the time-domain overlap region of PSFCH and PSSCH3, the sum of the transmission powers is P3 + P4. Based on this, the sum of the transmission powers of multiple side-line transmissions in the time-domain overlap region can be determined based on the maximum value among 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 transmission power of the sideline transmission. In some embodiments, after the terminal device adjusts the transmission power of the sideline transmission, the transmission power of the sideline transmission in the time-domain overlapping portion may be less than or equal to (i.e., not greater than or not exceeding) the first transmission power.

[0150] As one possible implementation, the terminal device can reduce the transmission power of one or more side-by-side transmissions in the time-domain overlap region, such that the transmission power of the side-by-side transmissions in the time-domain overlap region is less than or equal to a first transmission power. For example, if one or more side-by-side transmissions of the terminal device on a first carrier overlap with one or more side-by-side transmissions of the terminal device on a second carrier in the time domain, and the sum of the transmission powers of the multiple side-by-side transmissions in the time-domain overlap region of the first and second carriers is greater than the first transmission power, then the terminal device can reduce the transmission power of one or more side-by-side transmissions in the time-domain overlap region, such that the sum of the transmission powers of the multiple side-by-side transmissions in the overlap region is not greater than the first transmission power or the transmission power of one or more side-by-side transmissions in the time-domain overlap region is 0. If, after the transmission power of one or more side-by-side transmissions in the time-domain overlap region is 0, the sum of the transmission powers of the remaining side-by-side transmissions in the time-domain overlap region is still greater than the first transmission power, then the terminal device can again select one or more side-by-side transmissions in the remaining side-by-side transmissions to further reduce the transmission power, such that the sum of the transmission powers of the multiple side-by-side transmissions in the time-domain overlap region is not greater than the first transmission power or the transmission power of the one or more side-by-side transmissions selected again is 0. If the transmit power of one or more side-by-side transmissions is 0 again, and the sum of the transmit power of the remaining side-by-side transmissions in the time-domain overlap region is still greater than the first transmit power, then the terminal device can repeat the above steps until the sum of the transmit power of the multiple side-by-side transmissions in the time-domain overlap region is not greater than the first transmit power.

[0151] As another possible implementation, the adjustment of the transmission power of the sideline transmission by the terminal device can be dependent on the implementation of the terminal device. For example, reducing the transmission power of one or more sideline transmissions (until the transmission power is 0) is one implementation. Another example is reducing the transmission power of one or more sideline transmissions until the transmission power is a minimum transmission power value, which can be based on the terminal device implementation or determined based on pre-configuration information or network configuration information.

[0152] In some embodiments, the terminal device can adjust the transmit power of the sidelink transmission based on the sidelink priority (hereinafter 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 can be indicated by the "priority" information field in the sidelink control information (SCI); for PSFCH, the sidelink priority can be determined by the priority of the PSSCH associated with the sidelink feedback information carried by the PSFCH; for S-SSB, the sidelink priority can 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 can determine which carrier(s) to adjust the transmit power of sideline transmissions based on carrier association priorities. The carrier association priority is determined by the minimum value among the sideline priority values ​​corresponding to one or more sideline transmissions in the time-domain overlap region on the corresponding carrier. For example, the priority of the first carrier association can be a first value. The first value can be determined by the minimum value among the sideline priority values ​​corresponding to one or more sideline transmissions on the first carrier. The priority of the second carrier association can be a second value. The second value can be determined by the minimum value among the sideline priority values ​​corresponding to one or more sideline transmissions on the second carrier.

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

[0155] As mentioned above, the smaller the sideline priority value, the higher the corresponding sideline transmission priority. Therefore, based on the minimum priority value, this 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 can adjust the transmission power of the sideline transmission based on the relationship between the first value and the second value. For example, the terminal device can perform one or more of the following operations: if the first value is less than the second value, the terminal device can reduce the transmission 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 can reduce the transmission power of one or more sideline transmissions on the second carrier; if the first value is greater than the second value, the terminal device can reduce the transmission 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 can reduce the transmission power of one or more sideline transmissions on the first carrier.

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

[0158] In Figure 12, the transmission power of PSSCH1 is P1, the transmission power of PSSCH2 is P2, the transmission power of PSSCH3 is P3, and the sum of the transmission powers of the four PSSCHs is P4. The terminal equipment can adjust the transmission power of the sideline transmission for different situations. Examples 1 to 3 are given below.

[0159] Case 1: If the sum of the powers of the overlapping time domains, P1+P2, is less than the first transmission power, P1+P3 is greater than the first transmission power, and P3+P4 is less than the first transmission power, then the terminal device can reduce the transmission power P1 of PSSCH1 until the sum of the powers of P1+P3 is less than the first transmission power, or until P1 equals 0.

[0160] Case 2: If the sum of the powers of the overlapping time domains, P1+P2, is less than the first transmission power, P1+P3 is greater than the first transmission power, and P3+P4 is greater than the first transmission power, then the terminal device can reduce the transmission power P1 of PSSCH1 until the sum of the powers of P1+P3 is less than the first transmission power, or until P1 equals 0; and the terminal device can reduce the transmission power P4 of PSFCH until the sum of the powers of P3+P4 is less than the first transmission power, or until P4 equals 0.

[0161] Case 3: If the sum of the powers of the overlapping time domains, P1+P2, is greater than the first transmission power, P1+P3, and P3+P4 are greater than the first transmission power, then the terminal device can reduce the transmission power P1 of PSSCH1 until the sum of the powers of P1+P2 is less than the first transmission power and the sum of the powers of P1+P3 is less than the first transmission power, or until P1 equals 0; and the terminal device can reduce the transmission power P4 of PSFCH until the sum of the powers of P3+P4 is less than the first transmission power, or until P4 equals 0.

[0162] When the second carrier comprises multiple carriers, the terminal device can select the first carrier and the carrier with the highest priority value associated with the multiple carriers as the target carrier, and adjust or reduce the transmission power of one or more side-transmissions in the time-domain overlap portion on the target carrier. After the transmission power of one or more side-transmissions in the time-domain overlap portion on the target carrier is adjusted or reduced (e.g., reduced to 0), if the transmission power of the side-transmissions in the time-domain overlap portion of the remaining carriers is still greater than the first transmission power, the terminal device can select the carrier with the highest priority value among the remaining carriers as the target carrier and repeat the step of adjusting or reducing the transmission power of one or more side-transmissions in the time-domain overlap portion on the target carrier until the transmission power of the side-transmissions in the time-domain overlap portion 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 overlap portion on the carrier with the highest priority value. If the sum of the transmission powers in the time-domain overlap portion 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 transmission power of one or more side-transmissions in the time-domain overlap portion until the sum of the transmission powers in the time-domain overlap portion meets the requirement (e.g., does not exceed the first transmission power). The following explanation uses Figure 13 as an example.

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

[0164] As one possible implementation, the terminal device can reduce the transmission power of one or more sideline transmissions in the time-domain overlap region based on the sideline transmission priority. These one or more sideline transmissions in the time-domain overlap region can belong to the same carrier (e.g., the target carrier) or different carriers.

[0165] In some embodiments, the terminal device may adjust or reduce 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 overlap portion. If the transmission power of the first sideline transmission is adjusted or reduced (e.g., reduced to 0), and the transmission power of the remaining sideline transmissions in the time-domain overlap portion is greater than the first transmission power, the terminal device will use the sideline transmission with the highest corresponding sideline priority value among the remaining sideline transmissions as the first sideline transmission, and repeatedly execute the step of reducing the transmission power of the first sideline transmission until the transmission power of the sideline transmissions in the time-domain overlap portion is less than or equal to the first transmission power. Examples are given below with reference to Figures 14 and 13.

[0166] In Figure 14, the first time slot of carrier 3 includes transmission resources for PSSCH4 and PSFCH1. The second time slot of carrier 3 includes transmission resources for PSSCH5 and PSFCH2. The first time slot of carrier 4 includes transmission resources for PSFCH3. The second time slot of carrier 4 includes transmission resources for PSSCH6. As shown in Figure 14, PSFCH1 and PSFCH3 overlap in the time domain, and PSSCH6 overlaps with the time domain resources of PSSCH5 and PSFCH2. There is no sideline transmission in carrier 4 that overlaps with the time domain resources of PSSCH4. For the time domain overlap of PSFCH1 and PSFCH3, if the sum of the transmission powers of PSFCH1 and PSFCH3 exceeds the first transmission power, the transmission power of either 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 description, in conjunction with Figure 14, illustrates the situation where one or more sideline transmissions in the time-domain overlap portion adjusted or reduced by the terminal device may belong to the same carrier.

[0168] For the time-domain overlap of PSSCH6 and PSSCH5 with PSFCH2, if the sum of the transmission powers of PSSCH5 and PSSCH6 exceeds the first transmission power, or if the sum of the transmission powers of PSFCH2 and PSSCH6 exceeds the first transmission power, then the minimum priority value of PSSCH5 and PSFCH2 is compared with the priority value of PSSCH6. If the minimum priority value of PSSCH5 and PSFCH2 is less than the corresponding priority value of PSSCH6, then the transmission power of PSSCH6 is adjusted until the sum of the transmission powers of the time-domain overlapped side-by-side transmissions on the two carriers does not exceed the first transmission power, or until the transmission power of PSSCH6 is 0. If the minimum priority value of PSSCH5 and PSFCH2 is greater than the priority value of PSSCH6, then the transmission power of PSSCH5 and / or PSFCH2 is adjusted; if the sum of the transmission powers of PSSCH5 and PSSCH6 exceeds the first transmission power, and the sum of the transmission powers of PSFCH2 and PSSCH6 is less than the first transmission power, then the transmission power of PSSCH5 is adjusted until the sum of the transmission powers of PSSCH5 and PSSCH6 does not exceed the first transmission power, or until the transmission power of PSSCH5 is 0; if PSSCH5... If the sum of the transmission powers of SCH5 and PSSCH6 exceeds the first transmission power, and the sum of the transmission powers of PSFCH2 and PSSCH6 also exceeds the first transmission power, then the transmission power of PSSCH5 is adjusted until the sum of the transmission powers of PSSCH5 and PSSCH6 does not exceed the first transmission power, or until the transmission power of PSSCH5 is 0. Furthermore, the transmission power of PSFCH2 is adjusted until the sum of the transmission powers of PSFCH2 and PSSCH6 does not exceed the first transmission power, or until the transmission power of PSFCH2 is 0.

[0169] As shown in Figure 13, the transmission powers of PSSCH1, PSSCH2, and PSSCH3 are P1, P2, and P3, respectively, and P1+P2+P3 is greater than the first transmission power. The side-line priorities of 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 that P1+P2+P3 is not greater than the first transmission power, the terminal device can use the adjusted P3 to transmit PSSCH3, and use P1 and P2 to transmit PSSCH1 and PSSCH2, respectively. If P1+P2 is still greater than the first transmission power when P3 is adjusted to 0, 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 transmission power of multiple side-line transmissions can be reduced proportionally. For example, if the number of side-line transmissions requiring reduced transmission power is M, the terminal device can proportionally reduce the transmission power of the M side-line transmissions. Here, M can be a positive integer greater than 1. For instance, if the total transmission power of the M side-line transmissions is P_total, when the total transmission power of the M side-line transmissions is adjusted to P_target, the total transmission power of the time-domain overlap portion will not exceed the first transmission power. Therefore, each side-line transmission needs to be adjusted from P_total / N to P_target / M.

[0171] It should be noted that the side-transmission priorities of the M side-transmissions can be the same or different. For example, the terminal device can disregard the side-transmission priorities of the M side-transmissions and proportionally reduce the transmission power of the M side-transmissions. Alternatively, if the side-transmission priorities of the M side-transmissions are equal, the terminal device can proportionally reduce the transmission power of the M side-transmissions.

[0172] It should be noted that the M sideline transmissions can belong to the same carrier. For example, this same carrier can be the target carrier mentioned above. In other words, if there are M sideline transmissions on the target carrier that require reduced transmission power, the terminal device can proportionally reduce the transmission power of the M sideline transmissions on that target carrier.

[0173] Referring again to Figure 14, as mentioned above, if the minimum priority value of PSSCH5 and PSFCH2 on carrier 3 is greater than the priority value of PSSCH6 on carrier 4, the terminal device can adjust the transmission power of PSSCH5 and / or PSFCH2. For example, the terminal device can adjust the transmission 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 transmission power of PSFCH2 until the transmission power of PSFCH2 is 0 or the sum of the powers of PSSCH5, PSFCH2, and PSSCH6 is less than a first transmission 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 transmission power of PSSCH5 until the transmission power of PSSCH5 is 0 or the sum of the powers of PSSCH5, PSFCH2, and PSSCH6 is less than a first transmission power.

[0174] In some embodiments, if the side-line transmission requiring power adjustment includes N PSFCHs, the terminal device can adjust the transmission power of the N PSFCHs using Method 1 and Method 2 described below. Here, N can be a positive integer greater than or equal to 1.

[0175] Method 1: Adjust the transmission power of N PSFCHs according to the side-line priority corresponding to N PSFCHs.

[0176] For example, the terminal device can reduce the transmission power of the first PSFCH, which is the PSFCH with the highest corresponding side-going priority value among N PSFCHs. If the transmission power of the first PSFCH is reduced to 0, and the transmission power of the remaining side-going transmissions in the time-domain overlap region is greater than the first transmission power, the terminal device will use the PSFCH with the highest corresponding side-going priority value among the remaining PSFCHs as the first PSFCH, and repeat the step of reducing the transmission power of the first PSFCH until the transmission power of the side-going transmissions in the time-domain overlap region 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 highest priority value (i.e., the lowest priority) according to the priorities corresponding to the N PSFCHs, including reducing it to 0, and repeat the above steps until the total transmission power of the time-domain overlap region is not greater than the first transmission power.

[0177] Method 2: Proportionally reduce the transmission power of N PSFCHs. For example, the terminal device can proportionally reduce the transmission power of each of the N PSFCHs until the total transmission power of the time-domain overlap portion is no greater than the first transmission power, or until the transmission power of the N PSFCHs is 0. For example, the total transmission power of the N PSFCHs is P_PSFCH_total. When the total transmission power of the N PSFCHs is adjusted to P_PSFCH_target, the total transmission power of the time-domain overlap portion will not exceed the first transmission power. Therefore, each PSFCH needs to be adjusted from P_PSFCH_total / N to P_PSFCH_target / N.

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

[0179] For a given carrier, during a PSFCH transmission opportunity on that carrier, there may be multiple PSFCHs that need to be transmitted simultaneously. The terminal device can determine the number N of PSFCHs that need to be transmitted simultaneously based on the following information. Tx,PSFCH And / or transmit power on each PSFCH: The maximum number N of PSFCHs that the terminal device can transmit simultaneously. max,PSFCH And the second transmission power. The method for determining the second transmission power is explained below.

[0180] The second transmit power can 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 power of the resource pools on multiple carriers where multiple sideline transmissions with time-domain overlap reside. These will be explained below.

[0181] The maximum available transmission power of the PSFCH can be expressed as P. available Optionally, P available The following parameters can be determined: the priority value of multiple side-line transmissions that overlap in the time domain on multiple carriers, the first transmit power, and the transmit power of other side-line transmissions besides the multiple PSFCHs to be transmitted corresponding to the PSFCH transmission opportunity in the multiple side-line transmissions that overlap in the time domain on multiple carriers.

[0182] In one implementation, P available It can satisfy Among them, P TX1 C represents the first transmit power, and C indicates that in multiple side-row transmissions with overlapping time domains on multiple carriers, the priority value is less than P. prio The number of carriers, P prio This indicates the minimum priority value among multiple PSFCHs to be transmitted in this PSFCH transmission opportunity, P. c This represents the transmit power of the side-line transmission on the c-th carrier among the C carriers. In one embodiment, the second transmit power is equal to the maximum available transmit power of the 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 transmitted. The highest priority value of the multiple PSFCHs to be transmitted is 3. The time domain resources of PSSCH5 and PSFCH on carrier 3 overlap with those of PSSCH6 on carrier 4, and the sum of the transmission powers of PSSCH5 and PSSCH6 is less than the first transmission power. If the highest priority value of the multiple PSFCHs to be transmitted is greater than the priority value of PSSCH6, then when the sum of the transmission power of PSFCH and the transmission power of PSSCH6 exceeds the first transmission power, the transmission power of PSFCH needs to be reduced. Therefore, the maximum available transmission power of PSFCH can be determined based on the first transmission power and the transmission power of PSSCH6. For example, P... available =P TX1 -P PSSCH6 Among them, P TX1 P represents the first transmission power. PSSCH6 This indicates the transmit power of PSSCH6.

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

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

[0186] The sum of the maximum output power of the resource pools configured on multiple carriers where multiple sideline transmissions with time-domain overlap reside can be expressed as P. TX P TX It can satisfy Among them, P Emax,r,c The maximum output power configured in resource pool r for carrier c is given, where C represents the number of carriers containing multiple overlapping sideline transmissions in the time domain, R represents the number of resource pools corresponding to the PSFCHs that need to be transmitted simultaneously on a carrier, and resource pool r represents the resource pool containing the multiple overlapping sideline transmissions in the time domain. In one embodiment, the second transmit power is equal to the sum of the maximum output power configured in the resource pools on the multiple carriers containing the multiple overlapping sideline transmissions in the time domain (i.e., P). TX ).

[0187] The number of PSFCHs that the terminal device needs to send in the PSFCH transmission opportunity can be represented as N. sch,Tx,PSFCH The N sch,Tx,PSFCH Each PSFCH can include a PSFCH carrying HARQ information and / or conflict information. The terminal device can determine the appropriate PSFCH based on N. 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 for each PSFCH PSFCH The number N of PSFCH actually sent by the terminal 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 transmission power of each PSFCH shall not exceed the second transmission power mentioned above. If it exceeds the second transmission power, the terminal determines the number of PSFCHs to be transmitted based on the PSFCH priority, but the number of transmissions shall not be less than a lower limit value, so that the transmission power of each PSFCH is less than or equal to P. PSFH,one Among them, P PSFCH,one The calculation formula is: P PSFCH,one =P O_PSFCH+10log 10 (2 u )+α PSFCH ·PL D [dBm].

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

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

[0191] Scenario 1: The upper layer is configured with PSFCH to perform power control based on downlink path loss, N sch,Tx,PSFCH No more than N max,PSFCH And satisfy 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 At that time, the total power also does not exceed the second transmission power P. TX2 .

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

[0193] Scenario 2: Higher-level configuration of PSFCH for 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 scenario 2, the terminal device can autonomously determine N. Tx,PSFCH Not lower than a lower limit value N limit .

[0195] N limit The method for determining N may include, for example, the terminal device scheduling N sch,Tx,PSFCHThe PSFCHs are sorted from highest to lowest priority, and each PSFCH is then sorted according to its transmission power P. PSFCH,one The power is stacked sequentially, and the total power does not exceed P. TX2 The maximum number of PSFCHs is N. limit (0≤N limit <N sch,Tx,PSFCH ).

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

[0197] Scenario 3: Higher-level configuration of PSFCH for power control based on downlink path loss, N sch,Tx,PSFCH More than N max,PSFCH .

[0198] In scenario 3, the terminal device can proceed according to the side-by-side priority of the PSFCH in N. sch,Tx,PSFCH The PSFCH selects the N with the highest PSFCH side-going priority. max,PSFCH PSFCH, and then in N max,PSFCH Each PSFCH selects N Tx,PSFCH One PSFCH. Specifically, determine N. Tx,PSFCH The method for determining the number of PSFCHs and the transmission power of each PSFCH is the same as in cases (1) and (2) described above, except that N in (1) and (2) is changed. sch,Tx,PSFCH Replace with N max,PSFCH That's all.

[0199] Scenario 4: The upper layer is not configured with PSFCH for power control based on downlink path loss.

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

[0201] Optionally, the process of determining the PSFCH described above can be performed individually for each carrier. In this case, the maximum number N of PSFCHs that the terminal device can transmit simultaneously is... max,PSFCH This can be expressed as: the maximum number of PSFCHs that a terminal device can transmit simultaneously on a carrier.

[0202] Optionally, the process of determining the PSFCH described above can be performed on multiple carriers within a frequency band. In this case, the maximum number N of PSFCHs that the terminal device can transmit simultaneously is... max,PSFCH This can be expressed as the maximum number of PSFCHs that a terminal device can simultaneously transmit on all carriers within a frequency band. The following explanation uses Figure 16 as an example.

[0203] As shown in Figure 16, carrier 0 and carrier 1 are located in the same frequency band. There are 6 PSFCHs to be transmitted on carrier 0, and 5 PSFCHs to be transmitted on carrier 1. The number N of PSFCHs that the terminal device can transmit simultaneously in each frequency band is... max,PSFCH =8, then the terminal device selects 8 PSFCHs from a total of 11 PSFCHs to be transmitted, and calculates the transmission power of each PSFCH as P. PSFCH,one If six PSFCHs are selected in carrier 0, then the total transmit power of these six 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 process of determining the PSFCH described above can be performed on multiple carriers. These multiple carriers can be located in different frequency bands, in which case the maximum number N of PSFCHs that the terminal can transmit simultaneously is [number missing]. max,PSFCH This indicates the maximum number of PSFCHs that the terminal can transmit simultaneously on all carriers, or the maximum number of PSFCHs that the terminal can transmit simultaneously.

[0205] The method embodiments of this application have been described in detail above. The apparatus embodiments of this application are described in detail below. It should be understood that the descriptions of the method embodiments correspond to the descriptions of the apparatus embodiments. Therefore, any parts not described in detail can be referred to the foregoing method embodiments.

[0206] Figure 17 is a schematic structural diagram of a terminal device 1700 provided in an embodiment of this 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 sideline transmission if a first condition is met; wherein 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 the sum of the transmission powers of the multiple sideline transmissions in the time-domain overlap portion 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 following: the maximum transmit power of the terminal device; the maximum output power of the resource pool configured on the first carrier; the maximum transmit power of the resource pool configured on the first carrier; the maximum output power of the resource pool configured on the second carrier; and the maximum transmit power of the resource pool configured 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 configured on the resource pool on the first carrier and / or the second carrier; a third transmit power, determined based on the power level and / or 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-by-side transmit power of the terminal device in the resource pool.

[0211] In some embodiments, the second transmit power is determined based on the sum of linear values ​​corresponding to the first parameters configured on the resource pools of the first and second carriers.

[0212] In some embodiments, if one or more sideline transmissions on a first carrier or one or more sideline transmissions on a second carrier include PSSCH and / or PSCCH, then 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 PSSCH and / or PSCCH are located.

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

[0214] In some embodiments, if one or more sideline transmissions on the first carrier and one or more sideline transmissions on the second carrier include one or more of PSCCH, PSSCH and PSFCH, the first threshold and / or the second threshold are determined based on the minimum 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 RegulatoryThe second threshold satisfies: MIN{10log 10 P temp ,P PowerClass ,P Regulatory}; where 10log 10 P temp P represents the second transmission power. PowerClass This indicates the power level determined based on the power rating of the terminal device. MPR represents maximum power reduction, A-MPR represents additional maximum power reduction, and ΔT represents the additional maximum power reduction. IB Indicates additional tolerance; P-MPR indicates a reduction in maximum power management; P Regulatory This indicates the fourth transmission power.

[0216] In some embodiments, if one or more sideline transmissions on a first carrier and one or more sideline transmissions on a second carrier include an SSB, the first threshold and / or the second threshold are determined based on the minimum 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 satisfies: MIN{P} PowerClass ,P Regulatory}; where P PowerClass This indicates the power level determined based on the power rating of the terminal device. MPR represents maximum power reduction, A-MPR represents additional maximum power reduction, and ΔT represents the additional maximum power reduction. IB Indicates additional tolerance; P-MPR indicates a reduction in maximum power management; P Regulatory This indicates the fourth transmission power.

[0218] In some embodiments, the power reduction parameter includes one or more of the following: maximum power reduction; additional maximum power reduction; and power management maximum power reduction.

[0219] In some embodiments, the sum of the transmit power of the multiple side-transmissions in the time-domain overlap portion is determined based on the maximum value of the sum of the transmit power of the multiple side-transmissions in the time-domain overlap portion.

[0220] In some embodiments, the adjustment unit 1710 is specifically configured to: adjust 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.

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

[0222] In some embodiments, adjusting the transmission power of the sideline transmission according to the relationship between the first value and the second value includes one of the following: if the first value is less than the second value, then reducing the transmission power of one or more sideline transmissions on the second carrier; if the first value is less than or equal to the second value, then reducing the transmission power of one or more sideline transmissions on the second carrier; if the first value is greater than the second value, then reducing the transmission power of one or more sideline transmissions on the first carrier; if the first value is greater than or equal to the second value, then reducing the transmission power of one or more sideline transmissions on the first carrier.

[0223] In some embodiments, the second carrier includes multiple carriers. Adjusting the transmission power of the sideline transmissions 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 includes: reducing the transmission power of one or more sideline transmissions in the time-domain overlap portion on the target carrier, wherein the target carrier is the carrier with the highest priority value among the first carrier and multiple carriers, and the priority value associated with the first carrier and multiple carriers is determined according to the minimum value among the sideline priority values ​​corresponding to one or more sideline transmissions on the corresponding carriers; when the transmission power of one or more sideline transmissions in the time-domain overlap portion on the target carrier is reduced to 0, if the transmission power of the sideline transmissions in the time-domain overlap portion of the remaining carriers is greater than the first transmission power, then the carrier with the highest priority value among the remaining carriers is taken as the target carrier, and the step of reducing the transmission power of one or more sideline transmissions in the time-domain overlap portion on the target carrier is repeated until the transmission power of the sideline transmissions in the time-domain overlap portion is less than or equal to the first transmission power.

[0224] In some embodiments, the adjustment unit 1710 is specifically configured to: reduce the transmission power of one or more side-by-side transmissions in the multiple side-by-side transmissions of the time-domain overlap portion, such that the transmission power of the side-by-side transmissions in the time-domain overlap portion is less than or equal to a first transmission power.

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

[0226] In some embodiments, reducing the transmission power of one or more side-line transmissions in a plurality of side-line transmissions in a temporally overlapping region includes: if the number of side-line transmissions for which the transmission power needs to be reduced is M, then the transmission power of the M side-line transmissions is reduced proportionally; wherein M is a positive integer greater than 1.

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

[0228] In some embodiments, adjusting the transmission power of N PSFCHs according to their respective sideline priorities includes: reducing the transmission power of a first PSFCH, where the first PSFCH is the PSFCH with the highest corresponding sideline priority among the N PSFCHs; if the transmission power of the first PSFCH is reduced to 0, and the transmission power of the remaining sideline transmission in the time-domain overlap portion is greater than the first transmission power, then the PSFCH with the highest corresponding sideline priority among the remaining PSFCHs is taken 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 overlap portion is less than or equal to the first transmission power.

[0229] In some embodiments, the adjustment unit 1710 is specifically used to: reduce the transmission power of N PSFCHs proportionally if the side-line transmission that needs to adjust the transmission power includes N PSFCHs; where N is a positive integer greater than or equal to 1.

[0230] In some embodiments, one or more sideline transmissions on a first carrier overlap with one or more sideline transmissions on a second carrier in the time domain, including: one or more sideline transmissions on the first carrier overlap with one or more sideline transmissions on the second carrier in the time domain 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 the 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 value of the subcarrier interval corresponding to the first carrier and the second carrier; or, the first time range is determined based on the maximum value of the subcarrier interval 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, one or more side-transmissions on the second carrier are side-transmissions on the same carrier; or, one or more side-transmissions on the second carrier are side-transmissions on different carriers.

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

[0237] Figure 18 is a schematic structural diagram of a communication apparatus according to an embodiment of this application. The dashed lines in Figure 18 indicate that the unit or module is optional. The apparatus 1800 can be used to implement the methods described in the above method embodiments. The apparatus 1800 can be a chip or a terminal device.

[0238] Apparatus 1800 may include one or more processors 1810. The processor 1810 may support apparatus 1800 in implementing the methods described in the preceding method embodiments. 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 other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor.

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

[0240] The device 1800 may also include a transceiver 1830. The processor 1810 can communicate with other devices or chips via the transceiver 1830. For example, the processor 1810 can send and receive data with other devices or chips via the transceiver 1830.

[0241] This application also provides a computer-readable storage medium for storing a program. This computer-readable storage medium can be applied to a terminal provided in this application embodiment, and the program causes the computer to execute the methods executed by the terminal in various embodiments of this application.

[0242] This application also provides a computer program product. The computer program product includes a program. The computer program product can be applied to a terminal provided in this application embodiment, and the program causes the computer to execute the methods executed by the terminal in various embodiments of this application.

[0243] This application also provides a computer program. This computer program can be applied to the terminal provided in this application, and the computer program causes the computer to execute the methods executed by the terminal in various embodiments of this application.

[0244] It should be understood that the terms "system" and "network" in this application can be used interchangeably. Furthermore, the terminology used in this application is only for explaining specific embodiments of the application and is not intended to limit the application. The terms "first," "second," "third," and "fourth," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. In addition, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0245] In the embodiments of this application, the term "instruction" can be a direct instruction, an indirect instruction, or an indication of a relationship. For example, A instructing B can mean that A directly instructs B, such as B being able to obtain information through A; it can also mean that A indirectly instructs B, such as A instructing C, so B can obtain information through C; or it can mean that there is a relationship between A and B.

[0246] In the embodiments of this application, "B corresponding to A" means that B is associated with A, and B can be determined based on A. However, it should also be understood that determining B based on A does not mean that B is determined solely based on A; B can also be determined based on A and / or other information.

[0247] In the embodiments of this application, the term "correspondence" can indicate a direct or indirect correspondence between two things, or an association between two things, or a relationship such as instruction and being instructed, configuration and being configured.

[0248] In this application embodiment, "predefined" or "preconfigured" can be implemented by pre-storing corresponding codes, tables, or other means that can be used to indicate relevant information in the device (e.g., including terminal devices). This application does not limit the specific implementation method. For example, predefined can refer to what is defined in the protocol. Preconfigured can be configured when the device leaves the factory.

[0249] In this application embodiment, the "protocol" may refer to a standard protocol in the field of communication, such as the LTE protocol, the NR protocol, and related protocols applied to future communication systems. This application does not limit this.

[0250] In the embodiments of this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

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

[0252] In the various embodiments of this application, the order of the above-mentioned processes does not imply 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 this application.

[0253] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0254] The units described as separate components may or may not be physically separate. 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 the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0255] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0256] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially 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, all or part of the processes or functions described in the embodiments of this application are generated. 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. 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 wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can read or a data storage device such as a server or data center that integrates one or more available media. The available media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., digital video discs, DVDs) or semiconductor media (e.g., solid-state disks, SSDs), etc.

[0257] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

A method for sidelink communication, characterized in that Comprising: If the first condition is met, the terminal device adjusts a transmission power of the sidelink transmission; Wherein, the first condition comprises one or more of: One or more sidelink transmissions of the terminal device on the first carrier overlap in time domain with one or more sidelink transmissions of the terminal device on the second carrier; and A sum of transmission powers of a plurality of sidelink transmissions in a time domain overlapping part of the first carrier and the second carrier is greater than a first transmission power. The method of claim 1, wherein The first transmission power is determined based on one or more of: A maximum transmission power of the terminal device; A maximum output power of a resource pool configuration on the first carrier; A maximum transmission power of a resource pool configuration on the first carrier; A maximum output power of a resource pool configuration on the second carrier; and A maximum transmission power of a resource pool configuration on the second carrier. 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. The method according to claim 1 or 2, characterized in that The first threshold and / or the second threshold is determined based on one or more of: The method according to claim 3, characterized in that A second transmission power determined based on a first parameter of a resource pool configuration on the first carrier and / or the second carrier; A third transmission power determined based on a power class and / or a power reduction parameter of the terminal device; and A fourth transmission power determined based on a regulation. Wherein, the first parameter is used to indicate a maximum value of sidelink transmission power of a terminal device in the resource pool. The second transmission power is determined based on a sum of linear values corresponding to the first parameter of a resource pool configuration on the first carrier and the second carrier. If one or more of the sidelink transmissions on the first carrier or the sidelink transmissions on the second carrier comprises a PSSCH and / or a PSCCH, the first parameter of a resource pool configuration on the first carrier and / or the second carrier comprises a first parameter of a resource pool configuration where the PSSCH and / or the PSCCH is located. The method according to claim 4, characterized in that If one or more of the sidelink transmissions on the first carrier and the sidelink transmissions on the second carrier comprises a PSFCH, the first parameter of a resource pool configuration on the first carrier and / or the second carrier comprises the first parameter of each of one or more resource pool configurations where the PSFCH is located. The method according to claim 4 or 5, characterized in that If one or more of the sidelink transmissions on the first carrier and the sidelink transmissions on the second carrier comprises one or more of a PSCCH, a PSSCH and a PSFCH, the first threshold and / or the second threshold is determined based on a minimum value of a second transmission power, a third transmission power and a fourth transmission power. The method according to any one of claims 4 to 6, characterized in that The method of claim 8, wherein, The method according to any one of claims 4 to 7, characterized in that If one or more of the sidelink transmissions on the first carrier and the sidelink transmissions on the second carrier comprises an SSB, the first threshold and / or the second threshold is determined based on a minimum value of a third power and a fourth power. The method of claim 10, wherein, The first threshold satisfies: MIN{10 log 10 P temp , P PowerClass -MAX(MAX(MPR, A-MPR) + ΔT IB , P Regulatory -MPR), P} The second threshold satisfies: MIN{10 log 10 P temp ,P PowerClass ,P Regulatory} wherein 10 log 10 P temp denotes the second transmit power, P PowerClass denotes the power determined based on the power class of the terminal device, MPR denotes a maximum power reduction, A-MPR denotes an additional maximum power reduction, ΔT IB denotes an additional tolerance, P-MPR denotes a power management maximum power reduction, P Regulatory denotes the fourth transmit power. The method according to claim 4, characterized in that The power reduction parameter comprises one or more of: A maximum power reduction; The first threshold satisfies: MIN{P PowerClass , P-MPR} + ΔT IB , P-MPR} + ΔT Regulatory ; The second threshold satisfies: MIN{P PowerClass ,P Regulatory}; wherein P PowerClass represents the power determined based on the power class of the terminal device, MPR represents a maximum power reduction, A-MPR represents an additional maximum power reduction, ΔT IB represents an additional tolerance, P-MPR represents a power management maximum power reduction, P Regulatory represents the fourth transmission power. The method according to any one of claims 4 to 11, characterized in that An additional maximum power reduction; and A maximum power reduction. ​ ​ Power management maximum power reduction. The method according to any one of claims 1 to 12, characterized in that The sum of the transmission powers of the multiple sidelink transmissions in the time domain overlapping part is determined based on a maximum value of the sum of the transmission powers of the multiple sidelink transmissions in the time domain overlapping part. The method according to any one of claims 1 to 13, characterized in that The terminal device adjusts the transmission power of the sidelink transmission, comprising: The terminal device adjusts the transmission 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. The method of claim 14, wherein The terminal device adjusts the transmission 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, comprising: The terminal device adjusts the transmission power of the sidelink transmission according to the size relationship between the first value and the second value; The first value is determined according to the minimum value of the sidelink priority values corresponding to one or more sidelink transmissions on the first carrier, and the second value is determined according to the minimum value of the sidelink priority values corresponding to one or more sidelink transmissions on the second carrier. The method of claim 15, wherein The terminal device adjusts the transmission power of the sidelink transmission according to the size relationship between the first value and the second value, comprising one of the following: If the first value is less than the second value, the terminal device reduces the transmission power of the one or more sidelink transmissions on the second carrier; If the first value is less than or equal to the second value, the terminal device reduces the transmission power of the one or more sidelink transmissions on the second carrier; If the first value is greater than the second value, the terminal device reduces the transmission power of the one or more sidelink transmissions on the first carrier; If the first value is greater than or equal to the second value, the terminal device reduces the transmission power of the one or more sidelink transmissions on the first carrier. The method of claim 14, wherein The second carrier includes multiple carriers, and the terminal device adjusts the transmission 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, comprising: The terminal device reduces the transmission power of one or more sidelink transmissions in the time domain overlapping part on the target carrier, the target carrier being 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 being determined according to the minimum value of the sidelink priority values corresponding to one or more sidelink transmission on the corresponding carrier; In the case that the transmission power of one or more sidelink transmissions in the time domain overlapping part on the target carriers is reduced to 0, if the transmission power of the sidelink transmission in the time domain overlapping part of the remaining carriers is greater than the first transmission power, the terminal device takes the carrier with the highest priority value among the remaining carriers as the target carrier, and repeats the step of reducing the transmission power of one or more sidelink transmissions in the time domain overlapping part on the target carrie until the transmission power of the sidelink transmission in the time domain overlapping part is less than or equal to the first transmission power. The method according to any one of claims 1 to 17, characterized in that The terminal device adjusts the transmission power of the sidelink transmission, including: The terminal device reduces the transmission power of one or more of the plurality of sidelink transmissions in the time domain overlap part, so that the transmission power of the sidelink transmission in the time domain overlap part is less than or equal to the first transmission power. The method of claim 18, wherein The terminal device reduces the transmission power of one or more of the plurality of sidelink transmissions in the time domain overlap part, including: The terminal device reduces the transmission power of the first sidelink transmission, which is the sidelink transmission with the highest corresponding sidelink priority value among the sidelink transmissions in the time domain overlap part; In the case where the transmission power of the first sidelink transmission is reduced to 0, if the transmission power of the remaining sidelink transmission in the time domain overlap part is greater than the first transmission power, the terminal device takes the sidelink transmission with the highest corresponding sidelink 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 sidelink transmission in the time domain overlap part is less than or equal to the first transmission power. The method of claim 18, wherein The terminal device reduces the transmission power of one or more of the plurality of sidelink transmissions in the time domain overlap part, including: If the number of sidelink transmissions that need to reduce the transmission power is M, the terminal device reduces the transmission power of the M sidelink transmissions proportionally; Wherein, M is a positive integer greater than 1. The method according to any one of claims 1 to 20, characterized in that The terminal device adjusts the transmission power of the sidelink transmission, including: If the sidelink transmission that needs to adjust the transmission power includes N PSFCHs, the terminal device adjusts the transmission power of the N PSFCHs according to the corresponding sidelink priority of the N PSFCHs; Wherein, N is a positive integer greater than or equal to 1. The method of claim 21, wherein The terminal device adjusts the transmission power of the N PSFCHs according to the corresponding sidelink priority of the N PSFCHs, including: The terminal device reduces the transmission power of the first PSFCH, which is the PSFCH with the highest corresponding sidelink priority value among the N PSFCHs; In the case where the transmission power of the first PSFCH is reduced to 0, if the transmission power of the remaining sidelink transmission in the time domain overlap part is greater than the first transmission power, the terminal device takes the PSFCH with the highest corresponding sidelink 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 sidelink transmission in the time domain overlap part is less than or equal to the first transmission power. The method according to any one of claims 1 to 22, characterized in that The terminal device adjusts the transmission power of the sidelink transmission, including: If the sidelink transmission that needs to adjust the transmission power includes N PSFCHs, the terminal device reduces the transmission power of the N PSFCHs proportionally; Wherein, N is a positive integer greater than or equal to 1. The method according to any one of claims 1 to 23, characterized in that The one or more sidelinks on the first carrier overlap in time domain with the one or more sidelinks on the second carrier, including that the one or more sidelinks on the first carrier overlap in time domain with the one or more sidelinks on the second carrier in a first time range. The method of claim 24, wherein The first time range includes one or more of: a time range corresponding to one or more slots; and a time range corresponding to one or more symbols. 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. The method of claim 26, wherein 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. The method according to any one of claims 1 to 27, characterized in that The second carrier includes one or more carriers. The method of any of claims 1-28, wherein The one or more sidelinks on the second carrier are sidelinks on a same carrier; or The one or more sidelinks on the second carrier are sidelinks on different carriers. A terminal device, characterized by comprising: including: an adjusting unit configured to adjust a transmission power of the sidelink if a first condition is satisfied; wherein the first condition includes one or more of: the one or more sidelinks on the first carrier of the terminal device overlap in time domain with the one or more sidelinks on the second carrier of the terminal device; and a sum of transmission powers of the plurality of sidelinks of the time domain overlapping part of the first carrier and the second carrier is greater than a first transmission power. The terminal device according to claim 30, characterized in that The first transmission power is determined based on one or more of: a maximum transmission power of the terminal device; a maximum output power of a resource pool configuration on the first carrier; a maximum transmission power of a resource pool configuration on the first carrier; a maximum output power of a resource pool configuration on the second carrier; and a maximum transmission power of a resource pool configuration on the second carrier. 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. The terminal device according to claim 30 or 31, characterized in that The first threshold and / or the second threshold is determined based on one or more of: a second transmission power determined based on a first parameter of a resource pool configuration on the first carrier and / or the second carrier; The terminal device according to claim 32, characterized in that a third transmission power determined based on a power class and / or a power reduction parameter of the terminal device; and a fourth transmission power determined based on a regulation. The first parameter is used to indicate a maximum value of sidelink transmission power of a terminal device in the resource pool. The second transmission 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. ​ ​ The terminal device according to claim 33, characterized in that ​ The terminal device according to claim 33 or 34, characterized in that If one or more sidelink transmissions on the first carrier and one or more sidelink transmissions on the second carrier include a PSSCH and / or a PSCCH, the first parameter of the resource pool configuration on the first carrier and / or the second carrier includes a first parameter of a resource pool configuration in which the PSSCH and / or the PSCCH is located. The terminal device according to any one of claims 33 to 35, characterized by If one or more sidelink transmissions on the first carrier and one or more sidelink transmissions on the second carrier include a PSFCH, the first parameter of the resource pool configuration on the first carrier and / or the second carrier includes the first parameter of each of one or more resource pool configurations in which the PSFCH is located. The terminal device according to any one of claims 33 to 36, characterized by If one or more sidelink transmissions on the first carrier and one or more sidelink transmissions on the second carrier include one or more of a PSCCH, a PSSCH, and a PSFCH, the first threshold and / or the second threshold are determined based on a minimum value of a second transmission power, a third transmission power, and a fourth transmission power. The terminal device of claim 37, wherein 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} wherein 10 log 10 P temp denotes the second transmit power, P PowerClass denotes the power determined based on the power class of the terminal device, MPR denotes a maximum power reduction, A-MPR denotes an additional maximum power reduction, ΔT IB denotes an additional tolerance, P-MPR denotes a power management maximum power reduction, P Regulatory denotes the fourth transmit power. The terminal device according to claim 33, characterized in that If one or more sidelink transmissions on the first carrier and one or more sidelink transmissions on the second carrier include an SSB, the first threshold and / or the second threshold are determined based on a minimum value of a third power and a fourth power. The terminal device of claim 39, wherein The first threshold satisfies: MIN{P PowerClass , P-MPR} + ΔT IB , P-MPR} + ΔT Regulatory ; The second threshold satisfies: MIN{P PowerClass ,P Regulatory}; wherein P PowerClass represents the power determined based on the power class of the terminal device, MPR represents a maximum power reduction, A-MPR represents an additional maximum power reduction, ΔT IB represents an additional tolerance, P-MPR represents a power management maximum power reduction, P Regulatory represents the fourth transmission power. The terminal device according to any one of claims 33 to 40, characterized in that The power reduction parameter includes one or more of: a maximum power reduction; an additional maximum power reduction; and a power management maximum power reduction. The sum of the transmission powers of the plurality of sidelink transmissions in the time domain overlapping part is determined based on a maximum value of the sum of the transmission powers of the plurality of sidelink transmissions in the time domain overlapping part. The terminal device according to any one of claims 30 to 41, characterized in that The adjusting unit is specifically configured to: The terminal device according to any one of claims 30 to 42, characterized in that adjust the transmission power of the sidelink transmission according to the sidelink priority corresponding to the one or more sidelink transmissions on the first carrier and / or the sidelink priority corresponding to the one or more sidelink transmissions on the second carrier. The adjusting the transmission power of the sidelink transmission according to the sidelink priority corresponding to the one or more sidelink transmissions on the first carrier and / or the sidelink priority corresponding to the one or more sidelink transmissions on the second carrier includes: The terminal device according to claim 43, characterized in that adjusting the transmission power of the sidelink transmission according to a size relationship between a first value and a second value; wherein the first value is determined according to a minimum value of sidelink priority values corresponding to the one or more sidelink transmissions on the first carrier and the second value is determined according to a minimum value of sidelink priority values corresponding to the one or more sidelink transmissions on the second carrier. The adjusting the transmission power of the sidelink transmission according to the size relationship between the first value and the second value includes one of: The terminal device according to claim 44, characterized in that if the first value is less than the second value, reducing the transmission power of the one or more sidelink transmissions on the second carrier; if the first value is less than or equal to the second value, reducing the transmission power of the one or more sidelink transmissions on the second channel; if the first value is greater than the second value, reducing the transmission power of the one or more sidelink transmissions on the first carrier; ​ If the first value is greater than or equal to the second value, the transmission power of the one or more sidelinks on the first carrier is reduced. The terminal device according to claim 43, characterized in that The second carrier includes a plurality of carriers, and the adjusting the transmission power of the sidelink according to the sidelink priority corresponding to the one or more sidelinks on the first carrier and / or the sidelink priority corresponding to the one or more sidelinks on the second carrier includes: reducing the transmission power of the one or more sidelinks on the time domain overlap part of the target carrier, the target carrier being the carrier with the highest priority value among the first carrier and the plurality of carriers, the priority value of the first carrier and the plurality of carriers being determined according to the minimum value of the sidelink priority value corresponding to the one or more sidelinks on the corresponding carrier; in a case where the transmission power of the one or more sidelinks on the time domain overlap part of the target carrier is reduced to 0, if the transmission power of the sidelink of the time domain overlap part of the remaining carrier is greater than the first transmission power, the carrier with the highest priority value among the remaining carriers is taken as the target carrier, and the step of reducing the transmission power of the one or more sidelinks on the time domain overlap part of the target carrier is repeatedly executed until the transmission power of the sidelink of the time domain overlap part is less than or equal to the first transmission power. The terminal device according to any one of claims 30 to 46, characterized in that The adjusting unit is specifically configured to: reduce the transmission power of one or more sidelinks in the plurality of sidelinks of the time domain overlap part, so that the transmission power of the sidelink of the time domain overlap part is less than or equal to the first transmission power. The terminal device according to claim 47, characterized in that The reducing the transmission power of one or more sidelinks in the plurality of sidelinks of the time domain overlap part includes: reducing the transmission power of the first sidelink, the first sidelink being the sidelink with the highest corresponding sidelink priority value in the sidelinks of the time domain overlap part; in a case where the transmission power of the first sidelink is reduced to 0, if the transmission power of the remaining sidelink of the time domain overlap part is greater than the first transmission power, the sidelink with the highest corresponding sidelink priority value in the remaining sidelink is taken as the first sidelink, and the step of reducing the transmission power of the first sidelink is repeatedly executed until the transmission power of the sidelink of the time domain overlap part is less than or equal to the first transmission power. The terminal device according to claim 47, characterized in that The reducing the transmission power of one or more sidelinks in the plurality of sidelinks of the time domain overlap part includes: if the number of sidelinks whose transmission power needs to be reduced is M, the transmission power of the M sidelinks is reduced proportionally; wherein M is a positive integer greater than 1. The terminal device according to any one of claims 30 to 49, characterized in that The adjusting unit is specifically configured to: if the sidelink whose transmission power needs to be adjusted includes N PSFCHs, the transmission power of the N PSFCHs is adjusted according to the sidelink priority corresponding to the N PSFCHs; wherein N is a positive integer greater than or equal to 1. The terminal device according to claim 50, characterized in that The adjusting the transmission power of the N PSFCHs according to the sidelink priority corresponding to the N PSFCHs includes: decrease the transmission power of a first PSFCH, the first PSFCH being a corresponding PSFCH with the highest sidelink priority value among the N PSFCHs; in a case where the transmission power of the first PSFCH is decreased to 0, if the transmission power of the remaining sidelink transmission of the time-domain overlapping part is greater than the first transmission power, taking a corresponding PSFCH with the highest sidelink priority value among the remaining PSFCHs as the first PSFCH, and repeatedly performing the step of decreasing the transmission power of the first PSFCH until the transmission power of the sidelink transmission of the time-domain overlapping part is less than or equal to the first transmission power. The terminal device according to any one of claims 30 to 51, characterized in that The adjustment unit is specifically configured to: if the sidelink transmission requiring adjustment of transmission power includes N PSFCHs, decreasing the transmission power of the N PSFCHs proportionally; wherein N is a positive integer greater than or equal to 1. The terminal device according to any one of claims 30 to 52, characterized in that The one or more sidelink transmissions on the first carrier and the one or more sidelink transmissions on the second carrier overlap in time domain, including that the one or more sidelink transmissions on the first carrier and the one or more sidelink transmissions on the second carrier overlap in time domain resources within a first time range. The terminal device according to claim 53, characterized in that The first time range includes one or more of: a time range corresponding to one or more slots; and a time range corresponding to one or more symbols. 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. The terminal device according to claim 55, wherein 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. The terminal device according to any one of claims 30 to 56, characterized in that The second carrier includes one or more carriers. The terminal device according to any one of claims 30 to 57, wherein The one or more sidelink transmissions on the second carrier are sidelink transmissions on a same carrier; or The one or more sidelink transmissions on the second carrier are sidelink transmissions on different carriers. A terminal device, characterized by comprising: A terminal device includes a memory and a processor, the memory being configured to store a program, and the processor being configured to invoke the program in the memory to cause the terminal device to perform the method according to any one of claims 1-29. An apparatus, characterized in that An apparatus includes a processor configured to invoke a program from a memory to cause the apparatus to perform the method according to any one of claims 1-29. A chip characterized by A chip includes a processor configured to invoke a program from a memory to cause a device installed with the chip to perform the method according to any one of claims 1-29. A computer-readable storage medium, characterized by A computer program product has a program stored thereon, the program causing a computer to perform the method according to any one of claims 1-29. A computer program product, characterized by A computer program product has a program stored thereon, the program causing a computer to perform the method according to any one of claims 1-29. A computer program, characterized in that The computer program product causes a computer to perform the method according to any one of claims 1-29.

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