Lateral communication method and device

Abstract

A sidewalk communication method and device can clarify a signal transmission rule of a terminal device when the terminal device needs to transmit two kinds of signals at the same time so as to solve the problem of how to transmit a PSSCH by the terminal device. The method comprises the following steps: a first PSSCH to be sent is arranged on a time domain resource corresponding to a PSFCH sending opportunity in a COT, and M PSFCHs to be sent and N PSFCHs to be received are arranged on the time domain resource; under the condition that a first condition is met, sending a first PSSCH on the time domain resource; the first condition comprises that the first priority is higher than the second priority; or the third priority is higher than the fourth priority; or, the priority of the layer I of the PSFCH with the highest priority in the M PSFCHs to be sent is higher than the priority of the layer I of the PSFCH with the highest priority in the N PSFCHs to be received, and all or part of the PSFCHs in the M PSFCHs to be sent have the PSFCH sending opportunities which are not used yet.

Description

Technical Field

[0001] The present application relates to the field of communications, and more specifically, to a sideline communication method and device. Background Art

[0002] With the development of communication technology, end-to-end direct communication is expected to become a common new communication form, especially in indoor commercial scenarios, such as high-definition screen projection, file sharing and other services are directly transmitted between terminals. Sidelink (SL) communication is a protocol designed for direct communication between terminals in the 3rd generation partnership project (3GPP). In order to support the transmission of higher-speed services (such as virtual reality (VR) video, etc.), researchers have extended the direct communication between terminals to the unlicensed spectrum with a larger bandwidth, namely sidelink unlicensed transmission (SL-U). In the unlicensed spectrum, not only SL-U terminal devices are working, but also WIFI terminal devices. Therefore, SL-U terminal devices need to try to ensure that their transmission can occupy a continuous period of time within a channel occupancy time (COT) to avoid the transmission opportunity being snatched away by WIFI terminal devices.

[0003] The physical sidelink feedback channel (PSFCH) transmission opportunity is used to transmit PSFCH. In a COT, there may be no corresponding PSFCH transmission at the PSFCH transmission opportunity. In order to avoid the loss of COT (for example, being snatched away by a WIFI terminal device), a current design is: when a PSFCH transmission opportunity in the COT is not used by a terminal device, the terminal device transmits a physical sidelink shared channel (PSSCH) at the PSFCH transmission opportunity in the COT to occupy the COT.

[0004] However, since the terminal device may receive or send a PSSCH at a certain time-frequency position outside the COT, according to the mapping rule, the terminal device needs to send or receive the PSFCH at a transmission timing outside the COT that is located at the same position in the time domain as the PSFCH transmission timing in the COT, which will cause the PSFCH to be located at the same time domain position as the PSSCH used to occupy the COT. However, the terminal device cannot send the PSSCH used to occupy the COT while sending or receiving the PSFCH. Therefore, there is an urgent need to provide a method to solve the problem of how the terminal device transmits the PSSCH. Summary of the invention

[0005] The present application provides a sideline communication method and device, which can clarify the signal transmission rules of the terminal device when the terminal device needs to transmit two signals at the same time, so as to solve the problem of how the terminal device transmits the PSSCH.

[0006] In the first aspect, a sidelink communication method is provided, comprising: a first physical sidelink shared channel PSSCH to be sent on a time domain resource corresponding to a physical sidelink feedback channel PSFCH sending opportunity within a channel occupancy time COT, and M PSFCHs to be sent and N PSFCHs to be received on the time domain resource, M and N are both non-negative integers, and at least one of M and N is greater than 0; when a first condition is met, the first PSSCH is sent on the time domain resource; wherein the first condition includes any of the following: the first priority is higher than the second priority; or, the third priority is higher than the fourth priority; or, the layer 1 priority of the PSFCH with the highest layer 1 priority among the M PSFCHs to be sent is higher than the layer 1 priority of the PSFCH with the highest layer 1 priority among the N PSFCHs to be received, and all or part of the M PSFCHs to be sent have unused PSFCH sending opportunities; wherein the second priority is: The layer 1 priority of the PSFCH with the highest layer 1 priority in the received PSFCH, the first priority is: the preset layer 1 priority, or the layer 1 priority associated with the COT, or the layer 1 priority of the first PSSCH; or, the second priority is the preset layer 1 priority, the first priority is the layer 1 priority associated with the COT, or the layer 1 priority of the first PSSCH; wherein the fourth priority is: the associated CAPC of the PSFCH with the highest associated channel access priority CAPC among the M PSFCHs to be sent and the N PSFCHs to be received, the third priority is: the preset CAPC, or the CAPC of the COT, or the CAPC of the first PSSCH, the associated CAPC is the CAPC of the PSSCH corresponding to the PSFCH, or the CAPC of the COT where the PSSCH corresponding to the PSFCH is located; or, the fourth priority is the preset CAPC, and the third priority is the CAPC of the COT, or the CAPC of the first PSSCH.

[0007] The above method can be executed by a terminal device, which can be a terminal device, or a whole vehicle, an on-board unit (OBU), a vehicle-mounted module, a vehicle-mounted telematics processor (telematics-BOX, T-BOX), a road side unit (RSU), a chip, etc., and the embodiments of the present application are not limited to this.

[0008] It should be understood that the PSFCH to be sent is a feedback channel that needs to be sent / scheduled, and the feedback channel actually sent is part or all of the feedback channels to be sent. The PSSCH corresponding to the PSFCH can be understood as the PSFCH used to transmit the HARQ information corresponding to the PSSCH.

[0009] It should be understood that the above PSFCH transmission opportunity includes both time domain resources and frequency domain resources. The first PSSCH to be transmitted at the PSFCH transmission opportunity within the COT is service data to be transmitted at the PSFCH transmission opportunity.

[0010] The terminal device can determine that there is a first PSSCH to be sent on the time domain resources corresponding to the PSFCH transmission opportunity within the COT, and there are M PSFCHs to be sent and N PSFCHs to be received on the time domain resources.

[0011] In one possible implementation, it is determined that there is a first PSSCH to be sent on the time domain resources corresponding to the PSFCH sending opportunity within the COT, that is, it is determined that the PSFCH sending opportunity within the COT is not used by the terminal device, so the first PSSCH is sent at the sending opportunity. Determining that the PSFCH sending opportunity within the COT is not used by the terminal device can be determined by the terminal device through receiving indication information from the terminal device that initiates the COT, or it can be determined by the terminal device itself, and the embodiments of the present application are not limited to this.

[0012] The time domain resources corresponding to the PSFCH transmission timing include the symbols used to transmit the PSFCH. Transmitting the first PSSCH on the time domain resources corresponding to the PSFCH transmission timing may refer to transmitting the first PSSCH on the symbol used to transmit the PSFCH, and at least one of the AGC symbol immediately before the symbol used to transmit the PSFCH and the GAP symbol immediately before the AGC symbol.

[0013] It can be understood that the terminal device originally needs to send the first PSSCH on the symbol before the PSFCH transmission opportunity in the time slot where the PSFCH transmission opportunity is located. When the first condition is met, the terminal device also sends the first PSSCH on the time domain resources corresponding to the PSFCH transmission opportunity. The first PSSCH sent on the symbol before the PSFCH transmission opportunity and the first PSSCH sent on the time domain resources corresponding to the PSFCH transmission opportunity occupy the same frequency domain resources.

[0014] The sideline communication method of the embodiment of the present application can clarify the signal transmission rules of the terminal device when the terminal device needs to transmit two signals at the same time, so as to solve the problem of how the terminal device transmits the PSSCH.

[0015] In combination with the first aspect, in certain implementations of the first aspect, the preset layer one priority and the preset CAPC may refer to protocol predefined, factory preconfigured, or configured by the network device through signaling.

[0016] In combination with the first aspect, in certain implementations of the first aspect, the layer one priority associated with the COT is the highest priority or average priority among the layer one priorities of the PSSCH transmitted after the PSFCH sending opportunity in the COT.

[0017] In combination with the first aspect, in some implementations of the first aspect, the method further includes: receiving indication information from a terminal device that initiates the COT, wherein the indication information is used to indicate a layer one priority associated with the COT.

[0018] It should be understood that the terminal device that initiates the COT can determine the layer 1 priority associated with the COT based on the subsequent transmission of the COT. In a possible implementation, if the terminal device that executes the method is the terminal device that initiates the COT, the terminal device can determine the layer 1 priority associated with the COT by itself. If the terminal device that executes the method is not the terminal device that initiates the COT, the terminal device can receive indication information from the terminal device that initiates the COT, and determine the layer 1 priority associated with the COT based on the indication information.

[0019] In combination with the first aspect, in some implementations of the first aspect, the part of the PSFCHs is a PSFCH with a layer one priority higher than the first priority among the M PSFCHs to be sent; or, the part of the PSFCHs is a PSFCH with an associated CAPC higher than the third priority among the M PSFCHs to be sent. The first priority may be a preset layer one priority, or a layer one priority associated with the COT, or a layer one priority of the first PSSCH. The third priority may be a preset CAPC, or the CAPC of the COT, or the CAPC of the first PSSCH.

[0020] In combination with the first aspect, in some implementations of the first aspect, the part of PSFCH is M 1 Among the PSFCHs, the PSFCHs with layer 1 priority higher than the first priority; or, the part of the PSFCHs are the M 1 Among the PSFCHs, the associated CAPC is higher than the PSFCH of the third priority; wherein the M 1 A PSFCH is determined from the M PSFCHs to be sent, M 1Less than or equal to M. The first priority may be a preset layer 1 priority, or a layer 1 priority associated with the COT, or a layer 1 priority of the first PSSCH. The third priority may be a preset CAPC, or the CAPC of the COT, or the CAPC of the first PSSCH.

[0021] In a possible implementation, the above M 1 The feedback channels are determined by the terminal device itself, and M 1 Less than or equal to the maximum number of PSFCHs that can be sent simultaneously by the terminal device;

[0022] In another possible implementation, the terminal device needs to ensure that the transmission of the PSFCH does not affect the network equipment. Therefore, M 1 The transmission power of each PSFCH in the PSFCHs needs to be less than the power based on the downlink path loss. 1 The number of PSFCHs is determined based on the maximum transmit power, the maximum number of PSFCHs that can be sent simultaneously by the terminal device, the power based on the downlink path loss, and the layer 1 priority of the feedback channel.

[0023] In combination with the first aspect, in certain implementations of the first aspect, if the above-mentioned first condition is not met, the terminal device sends or receives PSFCH.

[0024] In a possible implementation, the terminal device may determine whether to send PSFCH or receive PSFCH according to the layer 1 priorities of M PSFCHs to be sent and N PSFCHs to be received. Specifically, if the layer 1 priority of the PSFCH with the highest layer 1 priority among the M PSFCHs to be sent is higher than the layer 1 priority of the PSFCH with the highest layer 1 priority among the N PSFCHs to be received, the terminal device sends PSFCH; otherwise, the terminal device receives PSFCH.

[0025] In another possible implementation, the terminal device may determine whether to send PSFCH or receive PSFCH based on the associated CAPCs of M PSFCHs to be sent and N PSFCHs to be received. Specifically, if the associated CAPC of the PSFCH with the highest associated CAPC among the M PSFCHs to be sent is higher than the associated CAPC of the PSFCH with the highest associated CAPC among the N PSFCHs to be received, the terminal device sends PSFCH; otherwise, the terminal device receives PSFCH. In addition, if it is determined to send PSFCH, the terminal device needs to ensure that the PSFCH with the highest associated CAPC is sent.

[0026] In other possible implementations, network equipment configuration signaling or pre-configuration signaling can be used to instruct the terminal device not to send PSSCH, but only to send or receive PSFCH; or, the terminal device can be instructed not to send or receive PSFCH, but only to send PSSCH, so as to avoid transmission conflicts or reception conflicts between PSFCH and PSSCH.

[0027] In other possible implementations, the terminal device may be defined in a predefined manner to always send PSSCH, or to always send or receive PSFCH, so as to avoid transmission conflict or reception conflict between PSFCH and PSSCH.

[0028] In other possible implementations of the present application, the fourth priority may also be the CAPC of the PSFCH specified by the protocol, that is, the CAPC of the PSFCH is a fixed value. For example, the protocol specifies that the CAPC value of the PSFCH is 1; the third priority may be: a preset CAPC, or the CAPC of the COT, or the CAPC of the first PSSCH.

[0029] According to a second aspect, another sidelink communication method is provided, comprising: a first signal to be sent on a time domain resource corresponding to a sending opportunity of a physical sidelink feedback channel PSFCH within a channel occupancy time COT, and N PSFCHs to be received on the time domain resource, where N is an integer greater than 0; in the case where a second condition is met, the first signal is sent on the time domain resource; wherein the first signal is a redundant signal for occupying the COT, and the second condition includes any one of the following: the fifth priority is higher than the sixth priority; or, the seventh priority is higher than the eighth priority; wherein the sixth priority is: the layer 1 priority of the PSFCH with the highest layer 1 priority among the N PSFCHs to be received, and the fifth priority is higher than the eighth priority. The priority is: a preset layer one priority, or a layer one priority associated with the COT; or, the sixth priority is a preset layer one priority, and the fifth priority is a layer one priority associated with the COT; wherein, the eighth priority is: the associated CAPC of the PSFCH with the highest associated channel access priority CAPC among the N PSFCHs to be received, and the seventh priority is: a preset CAPC, or the CAPC of the COT, and the associated CAPC is the CAPC of the PSSCH corresponding to the PSFCH, or the CAPC of the COT where the PSSCH corresponding to the PSFCH is located; or, the eighth priority is a preset CAPC, and the seventh priority is the CAPC of the COT.

[0030] The above method can be executed by a terminal device, which can be a terminal device, or a whole vehicle, OBU, vehicle-mounted module, T-BOX, RSU, chip, etc., and the embodiments of the present application are not limited to this.

[0031] The terminal device may determine that there is a first signal to be sent on a time domain resource corresponding to a PSFCH transmission opportunity within the COT, and that there are N PSFCHs to be received on the time domain resource.

[0032] The above-mentioned "sending the first signal on the time domain resources" can be understood as sending the first signal on the time domain resources and frequency domain resources corresponding to the PSFCH sending opportunity, and can also be called sending the first signal at the PSFCH sending opportunity. It can be understood that the time domain resources corresponding to the PSFCH sending opportunity include symbols used to send PSFCH. Sending the first signal on the time domain resources corresponding to the PSFCH sending opportunity refers to sending the first signal on at least one of the symbols used to send PSFCH, the AGC symbol immediately before the symbol used to send PSFCH, and the GAP symbol immediately before the above-mentioned AGC symbol.

[0033] The sideline communication method of the embodiment of the present application can clarify the signal transmission rules of the terminal device when the terminal device needs to transmit two signals at the same time, so as to solve the problem of how the terminal device transmits redundant signals.

[0034] In combination with the second aspect, in certain implementations of the second aspect, the layer one priority associated with the COT is the highest priority or average priority among the layer one priorities of the PSSCH transmitted after the PSFCH sending opportunity in the COT.

[0035] In combination with the second aspect, in some implementations of the second aspect, the method further includes: receiving indication information from a terminal device that initiates the COT, wherein the indication information is used to indicate a layer one priority associated with the COT.

[0036] In combination with the second aspect, in some implementations of the second aspect, there are M PSFCHs to be sent on the time domain resource, where M is an integer greater than 0; the method further includes: sending M PSFCHs on the time domain resource. 1 PSFCH, the M 1 A PSFCH is determined from the M PSFCHs to be sent, M 1 Less than or equal to M.

[0037] It should be understood that the terminal device sends the first signal on the time domain resource and sends the M signal on the time domain resource. 1PSFCHs, that is, the terminal device sends the PSFCH and the first signal simultaneously on the time domain resource. The terminal device can send the PSFCH and the first signal simultaneously. When there are M PSFCHs to be sent on the time domain resource corresponding to the PSFCH sending opportunity, if the terminal device determines to send the first signal, the terminal device will also send the PSFCH. Specifically, the terminal device can send M of the M PSFCHs to be sent. 1 PSFCH.

[0038] In combination with the second aspect, in certain implementations of the second aspect, the sixth priority is: the layer 1 priority of the PSFCH with the highest layer 1 priority among the N PSFCHs to be received, and the fifth priority also includes: the preset layer 1 priority and the highest layer 1 priority among the layer 1 priorities of the M PSFCHs to be sent, or the layer 1 priority associated with the COT and the highest layer 1 priority among the layer 1 priorities of the M PSFCHs to be sent.

[0039] In combination with the second aspect, in certain implementations of the second aspect, the eighth priority is: the associated CAPC of the PSFCH with the highest associated CAPC among the N PSFCHs to be received, and the seventh priority also includes: the preset CAPC and the highest CAPC among the associated CAPCs of the M PSFCHs to be sent, or the CAPC of the COT and the highest CAPC among the associated CAPCs of the M PSFCHs to be sent.

[0040] As an optional embodiment, the eighth priority may be the CAPC of PSFCH specified by the protocol, that is, the CAPC of PSFCH is a fixed value. For example, the protocol specifies that the CAPC value of PSFCH is 1; the seventh priority may be: a preset CAPC, or the CAPC of the COT.

[0041] In other possible implementations of the present application, the terminal device may be instructed to determine whether to send or receive PSFCH according to the prior art by means of network device configuration signaling or pre-configuration signaling. Optionally, if it is determined to send PSFCH, the first signal is sent at the same time; or, the terminal device is instructed to send the first signal and not receive PSFCH. Optionally, the terminal device may send PSFCH while sending the first signal to avoid a transmission / reception conflict between PSFCH and the first signal.

[0042] In other possible implementations of the present application, it is possible to predefine the terminal device to determine whether to send or receive the PSFCH according to the prior art. Optionally, if it is determined to send the PSFCH, the first signal is sent at the same time; or, it is possible to specify that the terminal device sends the first signal and does not receive the PSFCH. Optionally, the terminal device may send the PSFCH at the same time as the first signal to avoid a transmission / reception conflict between the PSFCH and the first signal.

[0043] According to a third aspect, another sidelink communication method is provided, including: a first physical sidelink shared channel PSSCH to be sent on the time domain resources corresponding to the sending opportunity of a physical sidelink feedback channel PSFCH; and sending the first PSSCH on the time domain resources corresponding to the sending opportunity of the PSFCH when the frequency domain resources occupied by the PSFCH sending opportunity include the frequency domain resources occupied by the first physical sidelink shared channel PSSCH.

[0044] In this way, irregular frequency domain resource occupation can be avoided and the demodulation performance of the receiving end can be guaranteed.

[0045] In combination with the third aspect, in certain implementations of the third aspect, the PSFCH sending opportunity is within the first channel occupancy time COT.

[0046] In combination with the third aspect, in certain implementations of the third aspect, the method further includes: sending a first signal on the time domain resources when the frequency domain resources occupied by the PSFCH sending opportunity do not include the frequency domain resources occupied by the first PSSCH, and the first signal is a redundant signal used to occupy the first COT.

[0047] The above “not including” can be understood as no overlap, or, there is overlap but the frequency domain resources occupied by the PSFCH transmission opportunity are less than the frequency domain resources occupied by the first PSSCH.

[0048] In combination with the third aspect, in certain implementations of the third aspect, the frequency domain resources occupied by the first PSSCH include the frequency domain resources occupied by the first signal.

[0049] In a fourth aspect, another sideline communication method is provided, comprising: when a terminal device sends a PSSCH at a PSFCH sending opportunity, the terminal device sends a signal for automatic gain control AGC on a time domain resource before the PSFCH sending opportunity.

[0050] In combination with the fourth aspect, in certain implementations of the fourth aspect, the PSFCH sending opportunity is within the first channel occupancy time COT, and there is no PSFCH to be transmitted at the PSFCH sending opportunity.

[0051] In combination with the fourth aspect, in certain implementations of the fourth aspect, if there is a first reference signal to be transmitted on a first time domain resource, the first reference signal is transmitted on a second time domain resource adjacent to the first time domain resource.

[0052] In a possible implementation, the time domain resource corresponding to the PSFCH transmission timing is a symbol for transmitting the PSFCH, and the symbol immediately preceding the symbol for transmitting the PSFCH is an AGC symbol, and the content transmitted on the AGC symbol is a copy of the content transmitted on the PSFCH symbol. Optionally, the GAP symbol before the AGC symbol is also used to transmit the PSSCH. The terminal device of the embodiment of the present application can perform rate matching according to the number of symbols actually available (excluding the above-mentioned AGC symbol).

[0053] The sideline communication method of the embodiment of the present application reserves an AGC symbol as a copy of the next symbol when sending PSSCH at an idle PSFCH sending opportunity, so that the receiving end can adjust the AGC range according to the AGC symbol, thereby enhancing the demodulation performance.

[0054] In combination with the fourth aspect, in certain implementations of the fourth aspect, the PSFCH sending opportunity is within the first channel occupancy time COT.

[0055] In a fifth aspect, a side communication device is provided, which is used to execute the method in any possible implementation of the first to fourth aspects. Specifically, the device includes a module for executing the method in any possible implementation of the first to fourth aspects.

[0056] In a sixth aspect, the present application provides another side communication device, including a processor, the processor is coupled to a memory, and can be used to execute instructions in the memory to implement the method in any possible implementation of the first to fourth aspects above. Optionally, the semantic communication device also includes a memory. Optionally, the semantic communication device also includes a communication interface, and the processor is coupled to the communication interface.

[0057] In one implementation, the side communication device is a terminal device. When the side communication device is a terminal device, the communication interface may be a transceiver, or an input / output interface.

[0058] In another implementation, the side communication device is a chip configured in the terminal device. When the side communication device is a chip configured in the terminal device, the communication interface may be an input / output interface.

[0059] In a seventh aspect, a processor is provided, comprising: an input circuit, an output circuit, and a processing circuit. The processing circuit is used to receive a signal through the input circuit and transmit a signal through the output circuit, so that the processor executes the method in any possible implementation of the first to fourth aspects above.

[0060] In the specific implementation process, the processor can be a chip, the input circuit can be an input pin, the output circuit can be an output pin, and the processing circuit can be a transistor, a gate circuit, a trigger, and various logic circuits. The input signal received by the input circuit can be, for example, but not limited to, received and input by a receiver, and the signal output by the output circuit can be, for example, but not limited to, output to a transmitter and transmitted by the transmitter, and the input circuit and the output circuit can be the same circuit, which is used as an input circuit and an output circuit at different times. The embodiments of the present application do not limit the specific implementation methods of the processor and various circuits.

[0061] In an eighth aspect, a processing device is provided, comprising a processor and a memory. The processor is used to read instructions stored in the memory, and can receive signals through a receiver and transmit signals through a transmitter to execute the method in any possible implementation of the first to fourth aspects above.

[0062] Optionally, the number of the processors is one or more, and the number of the memories is one or more.

[0063] Optionally, the memory may be integrated with the processor, or the memory may be provided separately from the processor.

[0064] In the specific implementation process, the memory can be a non-transitory memory, such as a read-only memory (ROM), which can be integrated with the processor on the same chip or can be set on different chips respectively. The embodiments of the present application do not limit the type of memory and the setting method of the memory and the processor.

[0065] It should be understood that the relevant data interaction process, such as sending indication information, can be a process of outputting indication information from a processor, and receiving capability information can be a process of receiving input capability information from a processor. Specifically, the processed output data can be output to a transmitter, and the input data received by the processor can come from a receiver. Among them, the transmitter and the receiver can be collectively referred to as a transceiver.

[0066] The processing device in the eighth aspect mentioned above can be a chip. The processor can be implemented by hardware or by software. When implemented by hardware, the processor can be a logic circuit, an integrated circuit, etc.; when implemented by software, the processor can be a general-purpose processor, which is implemented by reading the software code stored in the memory. The memory can be integrated in the processor or can be located outside the processor and exist independently.

[0067] In the ninth aspect, a computer program product is provided, comprising: a computer program (also referred to as code, or instruction), which, when executed, enables a computer to execute a method in any possible implementation of the first to fourth aspects above.

[0068] In the tenth aspect, a computer-readable storage medium is provided, which stores a computer program (also referred to as code, or instructions). When the computer-readable storage medium is run on a computer, the computer executes a method in any possible implementation of the first to fourth aspects above. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] Figure 1 is a schematic diagram of a communication system applicable to an embodiment of the present application;

[0070] Figure 2 Schematic diagram of PSFCH transmission timing;

[0071] Figure 3 This is a schematic diagram of a transmission conflict between PSFCH and PSSCH;

[0072] Figure 4 This is a schematic diagram of a transmission / reception conflict between PSFCH and PSSCH;

[0073] Figure 5 A schematic diagram of a transmission / reception conflict between a PSFCH and a redundant signal;

[0074] Figure 6 A schematic flow chart of a side communication method according to an embodiment of the present application;

[0075] Figure 7 This is a schematic diagram of the occupation of the first PSSCH pair of symbols in an embodiment of the present application;

[0076] Figure 8 is a schematic flow chart of another side communication method according to an embodiment of the present application;

[0077] Fig. 9 A schematic diagram of the irregular occupation of frequency domain resources by PSSCH;

[0078] Fig.10A schematic flow chart of another sideline communication method according to an embodiment of the present application;

[0079] Fig.11 Schematic diagram of various received energies caused by different signal transmission situations of two COTs;

[0080] Fig.12 A schematic flow chart of another sideline communication method according to an embodiment of the present application;

[0081] Fig.13 A schematic diagram of different signal transmission conditions of two COTs according to an embodiment of the present application;

[0082] Fig.14 A schematic block diagram of a side communication device according to an embodiment of the present application;

[0083] Fig.15 This is a schematic block diagram of another side line communication device according to an embodiment of the present application. DETAILED DESCRIPTION

[0084] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0085] In order to clearly describe the technical solutions of the embodiments of the present application, in the embodiments of the present application, words such as "first" and "second" are used to distinguish the same or similar items with substantially the same functions and effects. Those skilled in the art can understand that words such as "first" and "second" do not limit the quantity and execution order, and words such as "first" and "second" do not necessarily limit the difference.

[0086] It should be noted that, in this application, words such as "exemplarily" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplarily" or "for example" in this application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplarily" or "for example" is intended to present related concepts in a specific way.

[0087] In addition, "at least one" means one or more, and "plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b and c can mean: a, or b, or c, or a and b, or a and c, or b and c, or a, b and c, where a, b, c can be single or multiple.

[0088] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WiMAX) communication system, fifth generation (5G) system or new radio (NR), future evolved communication systems, such as sixth generation (6G) system, etc.

[0089] The technical solution provided in the present application can also be applied to machine type communication (MTC), long term evolution technology for machine-to-machine communication (LTE-M), device to device (D2D) network, machine to machine (M2M) network, Internet of Things (IoT) network or Internet of Vehicles. Among them, the communication methods in the Internet of Vehicles system are collectively referred to as vehicle to other devices (vehicle to X, V2X, X can represent anything), for example, the V2X may include: vehicle to vehicle (V2V) communication, vehicle to infrastructure (V2I) communication, vehicle to pedestrian (V2P) communication or vehicle to network (V2N) communication, etc.

[0090] The technical solution provided in this application can also be applied to indoor commercial scenarios, such as communication between smartphones and smart screens, communication between smartphones and VR glasses, etc.

[0091] To facilitate understanding of the embodiments of the present application, first Figure 1 A communication system applicable to an embodiment of the present application is introduced.

[0092] Figure 1 FIG. 1 is a schematic diagram of a communication system 100 applicable to an embodiment of the present application. Figure 1 As shown, the communication system 100 may include a terminal device 110, a terminal device 120, and a network device 130. The terminal device 110 and the terminal device 120 may communicate with each other through a sidelink communication technology, such as sending signaling and / or data. Optionally, the terminal device 110 and the network device 130 may communicate through a wireless air interface, and the terminal device 120 and the network device 130 may also communicate through a wireless air interface.

[0093] It should be understood that Figure 1 This is just an example, showing one network device and two terminal devices, but this should not constitute any limitation to the present application. The communication system 100 may also include more network devices, a larger number of terminal devices, or no network device, which is not limited in the present embodiment.

[0094] In the embodiment of the present application, the network device may be any device with wireless transceiver function. The network equipment includes, but is not limited to, evolved Node B (eNB), radio network controller (RNC), Node B (NB), base station controller (BSC), base transceiver station (BTS), home base station (e.g., home evolved NodeB, or homeNode B, HNB), baseband unit (BBU), access point (AP) in wireless fidelity (WiFi) system, wireless relay node, wireless backhaul node, transmission point (TP) or transmission and reception point (TRP), etc. It can also be a gNB in ​​a 5G, such as NR, system, or a transmission point (TRP or TP), one or a group of (including multiple antenna panels) antenna panels of a base station in a 5G system, or it can also be a network node constituting a gNB or a transmission point, such as a baseband unit (BBU), or a distributed unit (DU), etc.

[0095] In some deployments, the gNB may include a centralized unit (CU) and a DU. The gNB may also include an active antenna unit (AAU). The CU implements some functions of the gNB, and the DU implements some functions of the gNB. For example, the CU may be responsible for processing non-real-time protocols and services, such as the functions of the radio resource control (RRC) layer, the service data adaptation protocol (SDAP) layer, and / or the packet data convergence protocol (PDCP) layer. The DU may be responsible for processing physical layer protocols and real-time services. For example, the functions of the radio link control (RLC) layer, the media access control (MAC) layer, and the physical (PHY) layer may be implemented. A DU may be connected to only one CU or to multiple CUs, and a CU may be connected to multiple DUs, and the CU and DU may communicate through the F1 interface. The AAU may implement some physical layer processing functions, RF processing, and related functions of active antennas. Since the information of the RRC layer will eventually be delivered to the PHY layer and become the information of the PHY layer, or be converted from the information of the PHY layer, therefore, under this architecture, high-level signaling, such as RRC layer signaling, can also be considered to be sent by DU, or by DU+AAU.

[0096] It is understandable that the network device may be a device including one or more of a CU node, a DU node, and an AAU node. In addition, the CU may be classified as a network device in an access network (radio access network, RAN), or the CU may be classified as a network device in a core network (core network, CN), which is not limited in this application.

[0097] The network equipment provides services for the cell, and the terminal device communicates with the cell through the transmission resources (for example, frequency domain resources, or spectrum resources) allocated by the network equipment. The cell can belong to a macro base station (for example, macro eNB or macro gNB, etc.), or it can belong to a base station corresponding to a small cell. The small cell here may include: metro cell, micro cell, pico cell, femto cell, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

[0098] In an embodiment of the present application, the terminal device may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device.

[0099] The terminal device can be a device that provides voice / data connectivity to users, for example, a handheld device with wireless connection function, a vehicle-mounted device, etc. At present, some examples of terminals can be: mobile phones, tablet computers (pad), computers with wireless transceiver functions (such as laptops, PDAs, etc.), mobile Internet devices (mobile internet devices, MIDs), virtual reality (virtual reality, VR) devices, augmented reality (augmented reality, AR) devices, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones, session initiation protocol (session initiation protocol, SIP) phones, wireless local loop (wireless local loop, WLL) stations, personal digital assistants (personal digital assistants) assistant, PDA), handheld devices with wireless communication function, computing devices or other processing devices connected to a wireless modem, vehicle-mounted devices, wearable devices, terminal devices in 5G networks or terminal devices in future evolved public land mobile communication networks (public land mobile network, PLMN), etc.

[0100] Among them, wearable devices can also be called wearable smart devices, which are a general term for the intelligent design and development of wearable devices for daily wear using wearable technology, such as glasses, gloves, watches, clothing and shoes. Wearable devices are portable devices that are worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also realize powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include full-featured, large-sized, and independent of smartphones to achieve complete or partial functions, such as smart watches or smart glasses, as well as those that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various smart bracelets and smart jewelry for vital sign monitoring.

[0101] In addition, the terminal device can also be a terminal device in the Internet of Things (IoT) system. IoT is an important part of the future development of information technology. Its main technical feature is to connect objects to the network through communication technology, thereby realizing an intelligent network of human-machine interconnection and object-to-object interconnection. IoT technology can achieve massive connections, deep coverage, and terminal power saving through narrowband (NB) technology, for example.

[0102] In addition, terminal devices can also include sensors such as smart printers, train detectors, and gas stations. Their main functions include collecting data (part of the terminal device), receiving control information and downlink data from network equipment, and sending electromagnetic waves to transmit uplink data to network equipment.

[0103] In an embodiment of the present application, a terminal device or network equipment includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. The hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and a memory (also called main memory). The operating system can be any one or more computer operating systems that implement business processing through a process, such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system. The application layer includes applications such as a browser, an address book, a word processing software, and an instant messaging software. In addition, the embodiment of the present application does not specifically limit the specific structure of the execution subject of the method provided in the embodiment of the present application, as long as it can communicate according to the method provided in the embodiment of the present application by running a program that records the code of the method provided in the embodiment of the present application, for example, the execution subject of the method provided in the embodiment of the present application can be a terminal device or a network device, or a functional module in a terminal device or a network device that can call a program and execute a program.

[0104] In addition, various aspects or features of the present application can be implemented as methods, devices or products using standard programming and / or engineering techniques. The term "product" used in this application covers computer programs that can be accessed from any computer-readable device, carrier or medium. For example, computer-readable media may include, but are not limited to: magnetic storage devices (e.g., hard disks, floppy disks or tapes, etc.), optical disks (e.g., compact discs (CDs), digital versatile discs (DVDs), etc.), smart cards and flash memory devices (e.g., erasable programmable read-only memory (EPROM), cards, sticks or key drives, etc.). In addition, the various storage media described herein may represent one or more devices and / or other machine-readable media for storing information. The term "machine-readable medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing and / or carrying instructions and / or data.

[0105] For ease of understanding, the terms involved in this application are briefly explained below.

[0106] 1. Listen before talk (LBT) mechanism

[0107] LBT mechanisms are divided into two categories, namely Type 1 LBT and Type 2 LBT. Type 1 LBT requires counter rollback and generally requires a longer channel listening time; Type 2 LBT only requires a fixed channel listening time (such as 25us, 16us, etc.), and generally requires a shorter listening time. Therefore, Type 2 LBT has a higher probability of accessing the channel.

[0108] The period of time that the transmitter of the physical sidelink share channel (PSSCH) continuously occupies the channel after successful detection is called COT. In SL-U, generally, type 1 LBT is used to seize COT and type 2 LBT is used for COT sharing. The terminal that seizes COT through type 1 LBT can be called the terminal of the initial COT, or the terminal that initiates (initializes) COT. The terminal of the initial COT can share the COT with other terminals. When sharing COT, other terminals can access the channel through type 2 LBT.

[0109] 2. Time Domain Resources

[0110] The time domain resources are in units of time units, which may be time slots, subframes, symbols, or other time units to be defined in the future. It should be noted that the time unit is a unit of measurement in the time domain and is not necessarily the smallest time unit.

[0111] In the NR sidelink (NR SL), a time slot is a scheduling unit. The method provided in the embodiment of the present application will be described below using a time slot as an example of a time unit. It is understood that the description of the time slot in the following embodiments can also be replaced by other time units, such as a subframe, a symbol, etc. The embodiment of the present application does not limit this.

[0112] 3. Priority

[0113] The embodiments of the present application involve multiple priorities, including, for example: layer 1 (L1) priority and channel access priority class (CAPC).

[0114] Layer 1 priority may also be referred to as physical layer priority. Layer 1 priority may be, for example, a priority indicated in sidelink control information (SCI), indicated by a priority field in SCI. It is understood that layer 1 priority is the priority of the PSSCH scheduled by the SCI.

[0115] Specifically, the priority field in the SCI carries a priority value. The layer 1 priority may correspond to the priority value. For example, the lower the priority value, the higher the corresponding priority. For example, if the priority value ranges from 1 to 8, then when the priority value is 1, it represents the highest layer 1 priority.

[0116] It should be understood that the above is only for ease of understanding, and shows the layer 1 priority value ranging from 1 to 8, but this should not constitute any limitation to the present application. The present application does not impose any limitation on the specific value range of the layer 1 priority value. For example, the value range can also be an integer from 0 to 7.

[0117] It should be understood that the layer 1 priority may also be indicated in other signaling, such as a medium access control (CE) control element (CE) or a radio resource control (RRC) message.

[0118] It should be understood that the first priority level of this layer can also be characterized by a priority level, which is not limited in the embodiments of the present application.

[0119] For CAPC, when the terminal device executes Type 1 LBT to initiate COT, it needs to determine the parameters used by Type 1 LBT according to a certain CAPC, such as the contention window size, etc. In addition, the terminal device can also determine the maximum duration of COT according to CAPC. It can be understood that the CAPC used by the terminal device when initiating COT is the CAPC of the COT.

[0120] In addition, each PSSCH also has a corresponding CAPC, which can be predefined, (pre) configured, or passed to the physical layer by a higher layer (such as a MAC layer), which is not limited in this application. It can be understood that when the terminal device performs type 1 LBT, the CAPC used can be the CAPC of the PSSCH to be transmitted, or other CAPCs, which is not limited in this application.

[0121] CAPC may correspond to the CAPC value. In a possible implementation, the smaller the CAPC value, the higher the CAPC. For example, if the CAPC value ranges from 1 to 4, then when the CAPC value is 1, it represents the highest channel access priority.

[0122] It should be understood that the above text is only for ease of understanding, and shows CAPC values ​​ranging from 1 to 4, but this should not constitute any limitation to the present application.

[0123] 4. PSFCH occasion

[0124] The PSFCH transmission opportunity corresponds to time domain resources and frequency domain resources, and is periodically configured on the time slots in the resource pool. The configured period can be any time slot in {0, 1, 2, 4}, indicated by high-level parameters. It should be understood that when the configuration period is 0, it means that the resource pool disables PSFCH.

[0125] Take the configuration period of 4 time slots as an example. Figure 2 As shown, one time slot in every four time slots includes a PSFCH transmission opportunity, and the time slot includes symbols for transmitting PSFCH, corresponding AGC symbols and GAP symbols. It can be understood that the time domain resources corresponding to a PSFCH transmission opportunity include the symbols for transmitting PSFCH.

[0126] In a possible implementation, a symbol corresponding to a PSFCH transmission opportunity will transmit hybrid automatic repeat request (HARQ) information corresponding to the shared channel on four time slots, that is, an acknowledgement (ACK) or a negative acknowledgment (NACK).

[0127] In addition, when the receiving end receives the PSSCH, in order to leave time for demodulating the PSSCH, the receiving end will send the PSFCH according to the rules at the closest PSFCH sending opportunity at least 2 or 3 time slots (indicated by high-level parameters) from the received PSSCH. Figure 2 As shown, the receiving end receives the PSSCH in the 2nd time slot, and the 3rd time slot includes the PSFCH sending opportunity, but the 3rd time slot is only 1 time slot away from the 2nd time slot, and the receiving end does not have time to process it. Therefore, the receiving end will feedback the HARQ information corresponding to the PSSCH received in the 2nd time slot at the PSFCH sending opportunity of the 7th time slot.

[0128] It should be understood that on a symbol corresponding to a PSFCH transmission opportunity, there may be multiple PSFCHs scheduled to be sent, and multiple PSFCHs scheduled to be received. The protocol stipulates that whether the terminal device specifically sends or receives PSFCH depends on whether the PSFCH with the highest priority is the PSFCH scheduled to be sent or the PSFCH scheduled to be received. Exemplarily, when PSFCH is used to carry HARQ information, the priority of PSFCH is the layer 1 priority of PSSCH corresponding to PSFCH. PSFCH corresponds to a shared channel, which can be understood as a feedback channel used to transmit HARQ information corresponding to the shared channel.

[0129] The PSFCH transmission opportunity may be within a COT. In some cases, the PSFCH transmission opportunity within the COT may not be used by the terminal device. The following two situations are more common:

[0130] 1) The PSFCH transmission timing is too close to the starting time slot of the COT (for example, less than the value indicated by the high-level parameter), and the PSFCH corresponding to the PSSCH in the COT is not able to be transmitted at the PSFCH transmission timing.

[0131] 2) The one or more PSSCHs corresponding to the PSFCH transmission opportunity are PSSCHs that do not need to transmit PSFCH. For example, the one or more PSSCHs are PSSCHs used for broadcast, or PSSCHs used for NACK-only multicast and the receiving end correctly demodulates the PSSCH, or PSSCHs with HARQ disabled.

[0132] Considering that if PSFCH is not sent on the PSFCH symbol included in the PSFCH sending opportunity, it will not be sent on the GAP symbol and AGC symbol before the symbol. Not sending on the above three symbols may cause COT loss (such as being snatched away by a WIFI terminal device). In order to avoid COT loss, there are currently two designs:

[0133] The first design is: when a certain PSFCH transmission opportunity within the COT is not used by a terminal device, the PSSCH transmitter in the time slot where the PSFCH transmission opportunity is located transmits the PSSCH at the PSFCH transmission opportunity to occupy the COT.

[0134] The second design is: when a PSFCH transmission opportunity in the COT is not used by a terminal device, the terminal device transmits a redundant signal (such as a PSFCH-like signal) on the PSFCH transmission opportunity to occupy the COT. The terminal device that sends the redundant signal can be the terminal device of the initial COT or other terminal devices, and this application does not limit this.

[0135] However, for the first design, since the terminal device may receive or send a PSSCH at a certain time-frequency position outside the COT, according to the mapping rules, the terminal device needs to send or receive PSFCH at a transmission timing outside the COT that is located at the same position in the time domain as the PSFCH transmission timing in the COT. This will cause the PSFCH to conflict with the above-mentioned PSSCH used to occupy the COT.

[0136] Figure 3 The diagram is a schematic diagram of a transmission conflict between PSFCH and PSSCH. Taking UE 1 as an example, UE 1 transmits PSSCH on the COT shown in the figure. The COT occupies resource block (RB) set 1. Since no UE uses the PSFCH transmission opportunity in the COT, according to the first design mentioned above, UE 1 will transmit PSSCH at the PSFCH transmission opportunity in the COT to occupy the COT. However, at a certain time-frequency position of RB set 2 outside the COT, UE 2 sends a PSSCH to UE 1, that is, UE 1 receives a PSSCH, and UE 1 needs to send PSFCH (carrying the HARQ information of the above PSSCH) to UE 2. According to the mapping rules agreed upon in the protocol, UE 1 needs to send PSFCH at a transmission opportunity outside the COT that is located in the same symbol in the time domain as the PSFCH transmission opportunity in the COT, which will cause a transmission conflict between PSFCH and PSSCH.

[0137] Figure 4 The diagram is a schematic diagram of a transmission / reception conflict between PSFCH and PSSCH. Taking UE 1 as an example, UE 1 transmits PSSCH on the COT shown in the figure. The COT occupies RB set 1. Since no UE uses the PSFCH transmission opportunity in the COT, according to the first design mentioned above, UE 1 will transmit PSSCH at the PSFCH transmission opportunity in the COT to occupy the COT. However, at a certain time-frequency position of RB set 2 outside the COT, UE 1 transmits a PSSCH to UE 2, and UE 1 needs to receive the PSFCH fed back by UE 2. According to the mapping rules agreed upon in the protocol, UE 1 needs to receive PSFCH at the transmission opportunity outside the COT that is located in the same symbol in the time domain as the PSFCH transmission opportunity in the COT, which will cause a transmission / reception conflict between PSFCH and PSSCH.

[0138] For the second design, since the terminal device sends a PSSCH at a certain time-frequency position outside the COT, according to the mapping rules, the terminal device needs to receive the PSFCH at a transmission timing outside the COT that is located at the same position in the time domain as the PSFCH transmission timing in the COT. This will cause a transmission and reception conflict between the PSFCH and the above-mentioned redundant signal used to occupy the COT.

[0139] Figure 5 The figure is a schematic diagram of a PSFCH and redundant signal transmission conflict. Taking UE 1 as an example, the COT occupies RB set 1. Since no UE uses the PSFCH transmission opportunity in the COT, according to the second design mentioned above, UE 1 will send redundant signals at the PSFCH transmission opportunity in the COT to occupy the COT. However, at a certain time-frequency position of RB set 2 outside the COT, UE1 sends a PSSCH to UE 2, and UE 1 needs to receive the PSFCH fed back by UE 2. According to the mapping rules agreed upon by the protocol, UE1 happens to receive the PSFCH at a transmission opportunity outside the COT that is located in the same symbol in the time domain as the PSFCH transmission opportunity in the COT, which will cause a transmission conflict between the PSFCH and the redundant signal.

[0140] It should be understood that the above redundant signal is a signal used to occupy the COT and does not require demodulation by the receiving end. The redundant signal can be, for example, a PSFCH-like signal. It is generally believed that there is no send-send conflict between PSFCH and redundant signals, that is, the terminal device can send both at the same time. This is because the terminal device can decompose power by power control, that is, allocate part of the power to the redundant signal. However, since PSSCH needs to be successfully demodulated, there is a set of power allocation constraints. The current protocol does not support the terminal device to perform power control on PSFCH and PSSCH at the same time, that is, allocate part of the power to PSFCH and another part of the power to PSSCH. Therefore, there will be send-send conflicts between PSFCH and PSSCH.

[0141] In order to solve the above problems, the present application proposes a side communication method and sets a set of specific signal transmission rules.

[0142] To facilitate understanding of the embodiments of the present application, the following points are first explained.

[0143] First, the PSSCH, PSCCH, and PSFCH involved in the embodiments of the present application can be understood as physical resources, and can also be understood as data, signaling, etc. transmitted through these physical resources. For example, the terminal device sends data through the PSSCH, which can also be expressed as the terminal device sending the PSSCH; the terminal device sends control information such as SCI through the PSCCH, which can also be expressed as the terminal device sending the PSCCH; the terminal device sends feedback information such as HARQ information through the PSFCH, which can also be expressed as the terminal device sending the PSFCH. Those skilled in the art can understand its meaning.

[0144] Second, "predefined" may refer to the provisions of the protocol, which is achieved by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in the device (for example, including terminal devices and network devices). This application does not limit its specific implementation method.

[0145] (Pre) configuration includes configuration and pre-configuration. Among them, "pre-configuration" can refer to the implementation by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in a device (for example, including a terminal device and a network device). "Configuration" refers to the implementation through signaling settings, such as network devices through signaling settings, etc., and this application does not limit its specific implementation method.

[0146] Among them, "save" may mean to save in one or more memories. The one or more memories may be set separately or integrated in an encoder or decoder, a processor, or a communication device. The one or more memories may also be partially set separately and partially integrated in a decoder, a processor, or a communication device. The type of memory may be any form of storage medium, which is not limited by this application.

[0147] Third, the “protocol” involved in the embodiments of the present application may refer to a standard protocol in the communication field, for example, it may include an LTE protocol, an NR protocol, and related protocols used in future communication systems, which is not limited in the present application.

[0148] Fourth, in the embodiments of the present application, descriptions such as "when...", "in the case of...", "if" and "if" all mean that the device (such as a terminal device or a network device) will make corresponding processing under certain objective circumstances. It does not limit the time, and does not require the device (such as a terminal device or a network device) to have a judgment action when implementing it, nor does it mean that there are other limitations.

[0149] Fifth, in the embodiments of the present application, priority comparisons are involved in many places. For example, the comparison between the first priority and the second priority, the comparison between the third priority and the fourth priority, and so on. The result of the comparison can usually be divided into two branches. One design is that one branch is higher than (when the priority value is larger and the corresponding priority is lower, it can also be expressed as less than the priority value), and the other branch is lower than or equal to (it can also be expressed as greater than or equal to the priority value); or, another design is that one branch is higher than or equal to (when the priority value is higher and the corresponding priority is lower, it can also be expressed as less than or equal to the priority value), and the other branch is lower than (it can also be expressed as greater than the priority value). In the following text, when it comes to the comparison of priorities, unless otherwise specified, the above two designs can be applied.

[0150] For example, in one design, the first condition of the present application may be that the first priority is higher than the second priority; in another design, the first condition may be that the first priority is higher than or equal to the second priority. It should be understood that the first conditions under both designs are within the scope of protection of the present application. The first design is used as an example in the subsequent embodiments for illustration, and should not be construed as limiting the scope of protection of the present application. The second condition is similar and will not be described in detail here.

[0151] Combine the following Figure 6 The sideline communication method provided by the present application is introduced for the first design mentioned above to solve the problem of transmission conflict or reception conflict between PSFCH and PSSCH.

[0152] Figure 6 A schematic flow chart of a side communication method 600 provided in an embodiment of the present application, the method can be executed by a terminal device, the terminal device can be a terminal device, or a vehicle, an on-board unit (OBU), a vehicle module, a telematics-BOX (T-BOX), a road side unit (RSU), a chip, etc., which is not limited in the embodiment of the present application. The method 600 includes the following steps:

[0153] S610, determining that there is a first PSSCH to be sent on the time domain resources corresponding to the PSFCH sending opportunity within the COT, and that there are M PSFCHs to be sent and N PSFCHs to be received on the time domain resources, where M and N are both non-negative integers, and at least one of M and N is greater than 0.

[0154] It should be understood that the PSFCH to be sent is a feedback channel that needs to be sent / scheduled, and the feedback channel actually sent is part or all of the feedback channels to be sent. The PSSCH corresponding to the PSFCH can be understood as the PSFCH used to transmit the HARQ information corresponding to the PSSCH.

[0155] It should be understood that the above PSFCH transmission opportunity includes both time domain resources and frequency domain resources. The first PSSCH to be transmitted at the PSFCH transmission opportunity within the COT is service data to be transmitted at the PSFCH transmission opportunity.

[0156] In one possible implementation, it is determined that there is a first PSSCH to be sent on the time domain resources corresponding to the PSFCH sending opportunity within the COT, that is, it is determined that the PSFCH sending opportunity within the COT is not used by the terminal device, so the first PSSCH is sent at this sending opportunity.

[0157] It should be understood that determining that the PSFCH transmission opportunity within the COT is not used by the terminal device can be determined by the terminal device through receiving indication information from the terminal device initiating the COT, or it can be determined by the terminal device itself, and the embodiments of the present application are not limited to this.

[0158] It should also be understood that at least one of the above M and N being greater than 0 may include the following three situations:

[0159] Case 1, M = 0, N is greater than 0, and there are N PSFCHs to be received on the time domain resources;

[0160] Case 2: M is greater than 0, N is equal to 0, and there are M PSFCHs to be sent on the time domain resources;

[0161] Case 3: Both M and N are greater than 0, and there are M PSFCHs to be sent and N PSFCHs to be received on the time domain resources.

[0162] S620: When the first condition is met, send the first PSSCH on the time domain resources.

[0163] It can be understood that the time domain resources corresponding to the PSFCH transmission timing include the symbols used to transmit the PSFCH. Transmitting the first PSSCH on the time domain resources corresponding to the PSFCH transmission timing may refer to transmitting the first PSSCH on the symbol used to transmit the PSFCH, and at least one of the AGC symbol immediately before the symbol used to transmit the PSFCH and the GAP symbol immediately before the AGC symbol.

[0164] It can be understood that the terminal device originally needs to send the first PSSCH on the symbol before the PSFCH transmission opportunity in the time slot where the PSFCH transmission opportunity is located. When the first condition is met, the terminal device also sends the first PSSCH on the time domain resources corresponding to the PSFCH transmission opportunity. The first PSSCH sent on the symbol before the PSFCH transmission opportunity and the first PSSCH sent on the time domain resources corresponding to the PSFCH transmission opportunity occupy the same frequency domain resources.

[0165] For example, Figure 7 As shown, the symbols before the PSFCH transmission opportunity are symbols 0 to 9, the symbol used to transmit PSFCH is symbol 12, the AGC symbol immediately before the symbol used to transmit PSFCH is symbol 11, and the GAP symbol immediately before the above-mentioned AGC symbol is symbol 10. When the PSFCH transmission opportunity is used by a terminal device, symbols 10 to 12 are used to transmit or receive PSFCH, and when the PSFCH transmission opportunity is not used by a terminal device, symbols 10 to 12 are used to transmit the first PSSCH. In this way, when the PSFCH transmission opportunity is not used by a terminal device, symbols 0 to 9 and symbols 10 to 12 are both used to transmit the first PSSCH, and the frequency domain resources occupied by the first PSSCH in symbols 0 to 9 and symbols 10 to 12 are the same.

[0166] The first condition includes any one of the following:

[0167] The first priority is higher than the second priority; or,

[0168] The third priority is higher than the fourth priority; or,

[0169] The layer 1 priority of the PSFCH with the highest layer 1 priority among the M PSFCHs to be sent is higher than the layer 1 priority of the PSFCH with the highest layer 1 priority among the N PSFCHs to be received, and all or part of the M PSFCHs to be sent have unused PSFCH transmission opportunities;

[0170] The second priority is: the layer 1 priority of the PSFCH with the highest layer 1 priority among the M PSFCHs to be sent and the N PSFCHs to be received, and the first priority is: the preset layer 1 priority, or the layer 1 priority associated with the COT, or the layer 1 priority of the first PSSCH; or,

[0171] The second priority is a preset layer 1 priority, and the first priority is a layer 1 priority associated with the COT, or a layer 1 priority of the first PSSCH;

[0172] Among them, the fourth priority is: the associated CAPC of the PSFCH with the highest associated channel access priority CAPC among the M PSFCHs to be sent and the N PSFCHs to be received, the third priority is: the preset CAPC, or the CAPC of the COT, or the CAPC of the first PSSCH, the associated CAPC is the CAPC of the PSSCH corresponding to the PSFCH, or the CAPC of the COT where the PSSCH corresponding to the PSFCH is located; or,

[0173] The fourth priority is a preset CAPC, and the third priority is the CAPC of the COT, or the CAPC of the first PSSCH.

[0174] Specifically, the first condition may include the following conditions:

[0175] 1) The preset layer 1 priority is higher than the layer 1 priority of the PSFCH with the highest layer 1 priority among the M PSFCHs to be sent and the N PSFCHs to be received;

[0176] 2) The layer 1 priority associated with the COT is higher than the layer 1 priority of the PSFCH with the highest layer 1 priority among the M PSFCHs to be sent and the N PSFCHs to be received;

[0177] 3) The layer 1 priority of the first PSSCH is higher than the layer 1 priority of the PSFCH with the highest layer 1 priority among the M PSFCHs to be sent and the N PSFCHs to be received;

[0178] 4) The layer 1 priority associated with COT is higher than the preset layer 1 priority;

[0179] 5) The layer 1 priority of the first PSSCH is higher than the preset layer 1 priority;

[0180] 6) The preset CAPC is higher than the associated CAPC of the PSFCH with the highest associated channel access priority CAPC among the M PSFCHs to be sent and the N PSFCHs to be received;

[0181] 7) The CAPC of COT is higher than the associated CAPC of the PSFCH with the highest associated channel access priority CAPC among the M PSFCHs to be sent and the N PSFCHs to be received;

[0182] 8) The CAPC of the first PSSCH is higher than the CAPC associated with the PSFCH with the highest associated channel access priority CAPC among the M PSFCHs to be sent and the N PSFCHs to be received;

[0183] 9) The CAPC of COT is higher than the preset CAPC;

[0184] 10) The CAPC of the first PSSCH is higher than the preset CAPC;

[0185] 11) The layer 1 priority of the PSFCH with the highest layer 1 priority among the M PSFCHs to be sent is higher than the layer 1 priority of the PSFCH with the highest layer 1 priority among the N PSFCHs to be received, and all or part of the M PSFCHs to be sent have unused PSFCH transmission opportunities.

[0186] It should be understood that in the above conditions 1), 4) to 6), 9) and 10), the preset layer 1 priority and the preset CAPC may refer to protocol predefined, factory preconfigured, or configured by the network device through signaling, and the embodiments of the present application are not limited to this.

[0187] In the above conditions 2) and 4), the layer one priority associated with the COT may be the highest priority or the average priority among the layer one priorities of the PSSCH transmitted after the PSFCH transmission opportunity in the COT.

[0188] It is understandable that the layer 1 priority associated with the COT may also be indicated by the terminal device initiating the COT.

[0189] It should also be understood that one PSSCH may correspond to multiple PSFCH transmission opportunities. In the above condition 11), the PSSCH corresponding to one PSFCH has other future PSFCH transmission opportunities besides the current PSFCH transmission opportunity. Therefore, if all or part of the M PSFCHs to be transmitted have unused PSFCH transmission opportunities, the current PSFCH transmission opportunity can be used to transmit the first PSSCH.

[0190] It should also be understood that in one possible implementation, for the terminal device executing the present method (i.e., the transmitter of the PSSCH in the time slot where the PSFCH is sent), the M PSFCHs to be sent correspond to the M previously received PSSCHs of the terminal device, and the N PSFCHs to be received correspond to the N previously sent PSSCHs of the terminal device. Therefore, the terminal device knows the CAPC and layer one priority corresponding to each of the M previously received PSSCHs and the N previously sent PSSCHs.

[0191] The sideline communication method of the embodiment of the present application can clarify the signal transmission rules of the terminal device when the terminal device needs to transmit two signals at the same time, so as to solve the problem of how the terminal device transmits the PSSCH.

[0192] As an optional embodiment, if the above-mentioned first condition is not met, the terminal device sends or receives PSFCH. In a possible implementation, the terminal device can determine whether to send PSFCH or receive PSFCH based on the layer 1 priorities of M PSFCHs to be sent and N PSFCHs to be received. Specifically, if the layer 1 priority of the PSFCH with the highest layer 1 priority among the M PSFCHs to be sent is higher than the layer 1 priority of the PSFCH with the highest layer 1 priority among the N PSFCHs to be received, the terminal device sends PSFCH; otherwise, the terminal device receives PSFCH.

[0193] Exemplarily, the terminal device may first determine whether to send or receive PSFCH according to any one of the above conditions 1) to 5), and then determine whether to send PSFCH or receive PSFCH according to the layer 1 priorities of M PSFCHs to be sent and N PSFCHs to be received.

[0194] In another possible implementation, the terminal device may determine whether to send PSFCH or receive PSFCH based on the associated CAPCs of M PSFCHs to be sent and N PSFCHs to be received. Specifically, if the associated CAPC of the PSFCH with the highest associated CAPC among the M PSFCHs to be sent is higher than the associated CAPC of the PSFCH with the highest associated CAPC among the N PSFCHs to be received, the terminal device sends PSFCH; otherwise, the terminal device receives PSFCH. In addition, if it is determined to send PSFCH, the terminal device needs to ensure that the PSFCH with the highest associated CAPC is sent.

[0195] Exemplarily, the terminal device may first determine whether to send or receive PSFCH according to any one of the above conditions 6) to 10), and then determine whether to send or receive PSFCH according to the associated CAPCs of M PSFCHs to be sent and N PSFCHs to be received.

[0196] As an optional embodiment, the method further includes: receiving indication information from a terminal device that initiates the COT, wherein the indication information is used to indicate a layer 1 priority associated with the COT.

[0197] It should be understood that the terminal device that initiates the COT can determine the layer 1 priority associated with the COT based on the subsequent transmission of the COT. In a possible implementation, if the terminal device that executes the method is the terminal device that initiates the COT, the terminal device can determine the layer 1 priority associated with the COT by itself. If the terminal device that executes the method is not the terminal device that initiates the COT, the terminal device can receive indication information from the terminal device that initiates the COT, and determine the layer 1 priority associated with the COT based on the indication information.

[0198] For the above condition 11), there are five possible implementation methods:

[0199] In a first possible implementation, the layer 1 priority of the PSFCH with the highest layer 1 priority among the M PSFCHs to be sent is higher than the layer 1 priority of the PSFCH with the highest layer 1 priority among the N PSFCHs to be received, and all of the M PSFCHs to be sent have unused PSFCH transmission opportunities.

[0200] In a second possible implementation, the layer 1 priority of the PSFCH with the highest layer 1 priority among the M PSFCHs to be sent is higher than the layer 1 priority of the PSFCH with the highest layer 1 priority among the N PSFCHs to be received, and there is an unused PSFCH transmission opportunity among the M PSFCHs to be sent whose layer 1 priority is higher than the first priority.

[0201] In a third possible implementation, the layer 1 priority of the PSFCH with the highest layer 1 priority among the M PSFCHs to be sent is higher than the layer 1 priority of the PSFCH with the highest layer 1 priority among the N PSFCHs to be received, and there is an unused PSFCH transmission opportunity among the M PSFCHs to be sent whose associated CAPC is higher than the third priority.

[0202] In a fourth possible implementation, the layer 1 priority of the PSFCH with the highest layer 1 priority among the M PSFCHs to be sent is higher than the layer 1 priority of the PSFCH with the highest layer 1 priority among the N PSFCHs to be received, and the M 1 There is an unused PSFCH transmission opportunity in a PSFCH layer with a priority higher than the first priority.

[0203] In a fifth possible implementation, the layer 1 priority of the PSFCH with the highest layer 1 priority among the M PSFCHs to be sent is higher than the layer 1 priority of the PSFCH with the highest layer 1 priority among the N PSFCHs to be received, and the M 1 There is an unused PSFCH transmission opportunity for the PSFCHs whose associated CAPC is higher than the third priority among the PSFCHs.

[0204] The first priority may be: a preset layer 1 priority, or a layer 1 priority associated with the COT, or a layer 1 priority of the first PSSCH. The third priority may be: a preset CAPC, or the CAPC of the COT, or the CAPC of the first PSSCH.

[0205] It should be understood that the above M 1A PSFCH is determined from the M PSFCHs to be sent. 1 Less than or equal to M.

[0206] In a possible implementation, the above M 1 The feedback channels are determined by the terminal device itself, and M 1 Less than or equal to the maximum number of PSFCHs that can be sent simultaneously by the terminal device;

[0207] In another possible implementation, the terminal device needs to ensure that the transmission of the PSFCH does not affect the network equipment. Therefore, M 1 The transmission power of each PSFCH in the PSFCHs needs to be less than the power based on the downlink path loss. 1 The number of PSFCHs is determined based on the maximum transmit power, the maximum number of PSFCHs that the terminal device can send simultaneously, the power based on the downlink path loss, and the layer 1 priority of the feedback channel. For example, the power based on the downlink path loss can be recorded as P PSFCH,one , the maximum transmission power can be recorded as P cmax .

[0208] It should be understood that the above determination of M from M PSFCHs 1 The method of determining the PSFCH actually sent from the PSFCH to be sent can be based on the method of determining the PSFCH actually sent from the PSFCH to be sent in the existing protocol. For details, please refer to protocol 38.213, which will not be repeated here.

[0209] In other possible implementations of the present application, the network device can be configured to signal the terminal device not to send PSSCH, but only to send or receive PSFCH; or, the terminal device can be instructed not to send or receive PSFCH, but only to send PSSCH, so as to avoid transmission conflicts or reception conflicts between PSFCH and PSSCH.

[0210] In other possible implementations of the present application, the terminal device may be defined in a predefined manner to always send PSSCH, or to always send or receive PSFCH, so as to avoid transmission conflict or reception conflict between PSFCH and PSSCH.

[0211] In other possible implementations of the present application, the fourth priority may also be the CAPC of the PSFCH specified by the protocol, that is, the CAPC of the PSFCH is a fixed value, for example, the protocol specifies that the CAPC value of the PSFCH is 1; the third priority may be: a preset CAPC, or the CAPC of the COT, or the CAPC of the first PSSCH. It should be understood that in this implementation, if the third priority is higher than the fourth priority, it also includes three situations, which are similar to the previous text and will not be repeated here.

[0212] Combine the following Figure 8 The sideline communication method provided by the present application is introduced for the second design mentioned above to solve the problem of transmission and reception conflict between PSFCH and redundant signals.

[0213] Figure 8 A schematic flow chart of a side communication method 800 provided in an embodiment of the present application, the method can be executed by a terminal device, the terminal device can be a terminal device, or a whole vehicle, an on-board unit (OBU), a vehicle module, a telematics-BOX (T-BOX), a road side unit (RSU), a chip, etc., which is not limited in the embodiment of the present application. The method 800 includes the following steps:

[0214] S810, determining a first signal to be sent on a time domain resource corresponding to a physical sidelink feedback channel PSFCH sending opportunity within a channel occupancy time COT, and there are N PSFCHs to be received on the time domain resource, where N is an integer greater than 0.

[0215] In a possible implementation, it is determined that there is a first signal to be sent on the time domain resources corresponding to the PSFCH sending opportunity within the COT, that is, it is determined that the PSFCH sending opportunity within the COT is not used by the terminal device, so the first signal is sent at this sending opportunity.

[0216] It should be understood that determining that the PSFCH transmission opportunity within the COT is not used by the terminal device can be determined by the terminal device through receiving indication information from the terminal device initiating the COT, or it can be determined by the terminal device itself, and the embodiments of the present application are not limited to this.

[0217] S820: When the second condition is met, send the first signal on the time domain resource.

[0218] The above-mentioned "sending the first signal on the time domain resources" can be understood as sending the first signal on the time domain resources and frequency domain resources corresponding to the PSFCH sending opportunity, and can also be called sending the first signal at the PSFCH sending opportunity. It can be understood that the time domain resources corresponding to the PSFCH sending opportunity include symbols used to send PSFCH. Sending the first signal on the time domain resources corresponding to the PSFCH sending opportunity refers to sending the first signal on at least one of the symbols used to send PSFCH, the AGC symbol immediately before the symbol used to send PSFCH, and the GAP symbol immediately before the above-mentioned AGC symbol.

[0219] The first signal is a redundant signal used to occupy the COT, and the second condition includes any one of the following:

[0220] The fifth priority is higher than the sixth priority; or,

[0221] The seventh priority is higher than the eighth priority;

[0222] The sixth priority is: the layer 1 priority of the PSFCH with the highest layer 1 priority among the N PSFCHs to be received, and the fifth priority is: the preset layer 1 priority, or the layer 1 priority associated with the COT; or,

[0223] The sixth priority is a preset layer 1 priority, and the fifth priority is a layer 1 priority associated with the COT;

[0224] Among them, the eighth priority is: the associated CAPC of the PSFCH with the highest associated channel access priority CAPC among the N PSFCHs to be received, the seventh priority is: the preset CAPC, or the CAPC of the COT, the associated CAPC is the CAPC of the PSSCH corresponding to the PSFCH, or the CAPC of the COT where the PSSCH corresponding to the PSFCH is located; or,

[0225] The eighth priority is a preset CAPC, and the seventh priority is the CAPC of the COT.

[0226] Specifically, the second condition may include the following conditions:

[0227] 1) The preset layer 1 priority is higher than the layer 1 priority of the PSFCH with the highest layer 1 priority among the N PSFCHs to be received; in a possible implementation, the preset layer 1 priority can be understood as the layer 1 priority of the first signal;

[0228] 2) The layer 1 priority associated with the COT is higher than the layer 1 priority of the PSFCH with the highest layer 1 priority among the N PSFCHs to be received;

[0229] 3) The layer 1 priority associated with COT is higher than the preset layer 1 priority;

[0230] 4) The preset CAPC is higher than the associated CAPC of the PSFCH with the highest associated channel access priority CAPC among the N PSFCHs to be received; in a possible implementation, the preset CAPC can be understood as the CAPC of the first signal;

[0231] 5) The CAPC of COT is higher than the CAPC associated with the PSFCH with the highest associated channel access priority CAPC among the N PSFCHs to be received;

[0232] 6) The CAPC of COT is higher than the preset CAPC.

[0233] It should be understood that in the above conditions 1), 3), 4) and 6), the preset layer 1 priority and the preset CAPC may refer to protocol predefined, factory preconfigured, or configured by the network device through signaling, and the embodiments of the present application are not limited to this.

[0234] In the above conditions 2) and 3), the layer one priority associated with the COT may be the highest priority or the average priority among the layer one priorities of the PSSCH transmitted after the PSFCH transmission opportunity in the COT.

[0235] The PSSCH corresponding to the above-mentioned PSFCH can be understood as the PSFCH being used to transmit the HARQ information corresponding to the PSSCH.

[0236] The sideline communication method of the embodiment of the present application can clarify the signal transmission rules of the terminal device when the terminal device needs to transmit two signals at the same time, so as to solve the problem of how the terminal device transmits redundant signals.

[0237] As an optional embodiment, if the second condition is not met, the terminal device may receive PSFCH on the time domain resource. Further, if there are M PSFCHs to be sent, M is an integer greater than 0, and the priority of sending PSFCH is high, the terminal device may send PSFCH and the first signal.

[0238] It should be understood that the PSFCH to be sent is a feedback channel that needs to be sent / scheduled, and the feedback channel actually sent is part or all of the feedback channels to be sent.

[0239] As an optional embodiment, the method further includes: receiving indication information from a terminal device that initiates the COT, wherein the indication information is used to indicate a layer 1 priority associated with the COT.

[0240] It should be understood that the terminal device that initiates the COT can determine the layer 1 priority associated with the COT based on the subsequent transmission of the COT. In a possible implementation, if the terminal device that executes the method is the terminal device that initiates the COT, the terminal device can determine the layer 1 priority associated with the COT by itself; if the terminal device that executes the method is not the terminal device that initiates the COT, the terminal device can receive indication information from the terminal device that initiates the COT, and determine the layer 1 priority associated with the COT based on the indication information.

[0241] As an optional embodiment, there are M PSFCHs to be sent on the time domain resource, where M is an integer greater than 0; the method further includes: sending M PSFCHs on the time domain resource.1 PSFCH, the M 1 A PSFCH is determined from the M PSFCHs to be sent, M 1 Less than or equal to M. From M 1 The method of determining M PSFCHs from PSFCHs has been described in the previous text and will not be repeated here.

[0242] It should be understood that the terminal device sends the first signal on the time domain resource and sends the M signal on the time domain resource. 1 PSFCHs, that is, the terminal device sends the PSFCH and the first signal simultaneously on the time domain resource. The terminal device can send the PSFCH and the first signal simultaneously. When there are M PSFCHs to be sent on the time domain resource corresponding to the PSFCH sending opportunity, if the terminal device determines to send the first signal, the terminal device will also send the PSFCH. Specifically, the terminal device can send M of the M PSFCHs to be sent. 1 PSFCH.

[0243] As an optional embodiment, the sixth priority is: the layer 1 priority of the PSFCH with the highest layer 1 priority among the N PSFCHs to be received, and the fifth priority also includes: the preset layer 1 priority and the highest layer 1 priority among the layer 1 priorities of the M PSFCHs to be sent, or the layer 1 priority associated with the COT and the highest layer 1 priority among the layer 1 priorities of the M PSFCHs to be sent.

[0244] As an optional embodiment, the eighth priority is: the CAPC associated with the PSFCH with the highest associated CAPC among the N PSFCHs to be received, and the seventh priority also includes: the preset CAPC and the highest CAPC among the associated CAPCs of the M PSFCHs to be sent, or the CAPC of the COT and the highest CAPC among the associated CAPCs of the M PSFCHs to be sent.

[0245] As an optional embodiment, the eighth priority may be the CAPC of PSFCH specified by the protocol, that is, the CAPC of PSFCH is a fixed value. For example, the protocol specifies that the CAPC value of PSFCH is 1; the seventh priority may be: a preset CAPC, or the CAPC of the COT.

[0246] In other possible implementations of the present application, the terminal device may be instructed to determine whether to send or receive PSFCH according to the prior art by means of network device configuration signaling or pre-configuration signaling. Optionally, if it is determined to send PSFCH, the first signal is sent at the same time; or, the terminal device is instructed to send the first signal and not receive PSFCH. Optionally, the terminal device may send PSFCH while sending the first signal to avoid a transmission / reception conflict between PSFCH and the first signal.

[0247] In other possible implementations of the present application, it is possible to predefine the terminal device to determine whether to send or receive the PSFCH according to the prior art. Optionally, if it is determined to send the PSFCH, the first signal is sent at the same time; or, it is possible to specify that the terminal device sends the first signal and does not receive the PSFCH. Optionally, the terminal device may send the PSFCH at the same time as the first signal to avoid a transmission / reception conflict between the PSFCH and the first signal.

[0248] For the first design mentioned above, the transmitter of PSSCH transmits PSSCH on PSFCH transmission opportunities that are not used by terminal devices in COT to avoid COT loss. However, when PSSCH in COT occupies multiple RB sets, and only some of the multiple RB sets correspond to PSFCH transmission opportunities that are not used by terminal devices, if the transmitter still follows the above design and sends PSSCH on some RB sets that are not used by terminal devices, it will cause irregular occupation of frequency domain resources by PSSCH, affecting the detection performance of the receiving end.

[0249] Take UE as an example. Fig. 9 This is a schematic diagram of the irregular occupation of frequency domain resources by PSSCH. Fig. 9 FIG. 4 shows the signal transmission situation of a time slot in COT. The PSSCH in the time slot occupies RB set 0 and RB set 1. The PSSCH may be sent from UE 1 to UE 2, for example. Fig. 9 In the example, the PSFCH transmission opportunity on RB set 1 is not used by UE, and UE 1 corresponding to the time slot transmits PSSCH at the PSFCH transmission opportunity. However, the PSFCH transmission opportunity on RB set 0 is used by UE, and UE 1 cannot transmit PSSCH at the PSFCH transmission opportunity corresponding to RB set 0. In this way, irregular occupation of frequency domain resources by PSSCH occurs.

[0250] In order to solve this problem, the embodiment of the present application also provides a side communication method, such as Fig.10The method 1000 shown in the figure can be executed by a terminal device, which can be a terminal device, or a whole vehicle, an on-board unit (OBU), a vehicle module, a telematics-BOX (T-BOX), a road side unit (RSU), a chip, etc., which is not limited in the embodiment of the present application. The method 1000 includes the following steps:

[0251] S1010, determining a first PSSCH to be transmitted on a time domain resource corresponding to a PSFCH transmission opportunity.

[0252] “The first PSSCH to be transmitted on the time domain resource corresponding to the PSFCH transmission opportunity” is equivalent to “the PSFCH transmission opportunity is not used”. It should be understood that the terminal device can determine on its own that the PSFCH transmission opportunity is not used, or it can receive indication information from the terminal device that initiates the COT and determine that the PSFCH transmission opportunity is not used according to the indication information. The embodiments of the present application are not limited to this.

[0253] It should also be understood that the PSFCH transmission opportunity here refers to a set of idle time-frequency resources (not occupied by terminal devices) used to send PSFCH. For example, the PSFCH transmission opportunity can correspond to a PSFCH symbol in the time domain and to RB set 1 in the frequency domain.

[0254] S1020: When the frequency domain resources occupied by the PSFCH transmission opportunity not used by the terminal device include the frequency domain resources occupied by the first PSSCH, the first PSSCH is transmitted on the time domain resources corresponding to the PSFCH transmission opportunity.

[0255] In this way, irregular frequency domain resource occupation can be avoided and the demodulation performance of the receiving end can be guaranteed.

[0256] As an optional embodiment, the PSFCH sending opportunity is located within the first COT.

[0257] As an optional embodiment, when the frequency domain resources occupied by the PSFCH sending opportunity do not include the frequency domain resources occupied by the first PSSCH, the terminal device may not perform any operation at the PSFCH sending opportunity, or the terminal device may send a first signal at the PSFCH sending opportunity, and the first signal is a redundant signal for occupying the first COT.

[0258] The above “not including” can be understood as no overlap, or, there is overlap but the frequency domain resources occupied by the PSFCH transmission opportunity are less than the frequency domain resources occupied by the first PSSCH.

[0259] As an optional embodiment, the frequency domain resources occupied by the first PSSCH include the frequency domain resources occupied by the first signal.

[0260] In addition, the present application also provides a side communication method, in which the terminal device always sends PSSCH at an idle PSFCH sending opportunity. However, the terminal device needs to indicate the RB set occupied by PSSCH on the symbol corresponding to the PSFCH sending opportunity in the PSCCH that schedules PSSCH, so as to facilitate the receiving end to demodulate PSSCH.

[0261] In a possible implementation, the terminal device may indicate the set of RBs occupied by the PSSCH in the form of a bitmap, for example, 0 indicates unoccupied, and 1 indicates occupied.

[0262] As an optional embodiment, the receiving end may perform power boosting on the symbol corresponding to the PSFCH transmission timing. Whether to perform power boosting on the symbol corresponding to the PSFCH transmission timing may be predefined, or factory configured, or configured by the network device through signaling, or indicated by the terminal device through signaling (e.g., PSCCH scheduling PSSCH).

[0263] If power boosting is not performed, the power of each resource element (RE) on the symbol corresponding to the PSFCH transmission timing is the same as the power of each RE on the symbols used to transmit PSSCH several times before this time slot; if power boosting is performed, the transmission power on the symbol corresponding to the PSFCH transmission timing is the same as the transmission power on the symbols used to transmit PSSCH several times before this time slot.

[0264] As an optional embodiment, the terminal device may indicate to the receiving end in the PSCCH for scheduling the PSSCH: whether to consider the number of REs corresponding to the frequency domain resources not used at the PSFCH transmission opportunity when calculating the transport block size.

[0265] In a possible implementation, when calculating the transport block size, the receiving end can determine, according to the indication, whether to subtract the number of REs corresponding to the unused RBs at the PSFCH transmission time from the calculated number of REs. Exemplarily, the calculation method of this part of the number of REs is as follows: 3*L*12-6*L, where L is the number of unused RBs.

[0266] It should be understood that when the first PSSCH is specifically sent in the embodiment of the present application, the terminal device needs to perform rate matching according to the transport block size and the physical resources that can actually be used.

[0267] Through the above method, the detection performance of the receiving end can be improved.

[0268] For the first design mentioned above, assuming that there are multiple COTs in a resource pool, for the PSFCH sending timing at the same time domain position, the PSFCH sending timing in some COTs may be used to transmit PSFCH, while the PSFCH sending timing in some COTs may be used to transmit PSSCH. The receiving end of PSSCH may receive multiple energies in one time slot, affecting the performance of AGC and demodulation.

[0269] Take UE as an example. Fig.11 The figure shows a schematic diagram of different signal transmission situations of two COTs leading to various received energies. Fig.11 As shown, within the COT of UE 1, UE 1 sends PSSCH to UE 3, and UE 4 feeds back PSFCH to UE 3 at the PSFCH sending opportunity within the COT of UE 1. Within the COT of UE 2, UE 2 sends PSSCH to UE 3. Since the PSFCH sending opportunity within the COT of UE 2 is not used by any UE, according to the first design above, UE 2 sends PSSCH at the PSFCH sending opportunity. Therefore, as UE 3, three kinds of energy will be received in this time slot, namely: the energy of UE 1+UE 2, the energy of UE 2, and the energy of UE2+UE 4.

[0270] In order to solve this problem, the embodiment of the present application also provides a side communication method, such as Fig.12 The method 1200 shown in the figure can be executed by a terminal device, which can be a terminal device, or a whole vehicle, an on-board unit (OBU), a vehicle module, a telematics-BOX (T-BOX), a road side unit (RSU), a chip, etc., which is not limited in the embodiment of the present application. The method 1200 includes the following steps:

[0271] S1210, when the terminal device sends PSSCH at the PSFCH sending opportunity, the terminal device sends a signal for automatic gain control AGC on the time domain resources before the PSFCH sending opportunity.

[0272] “PSSCH is transmitted at the PSFCH transmission opportunity” is equivalent to “PSFCH transmission opportunity is not used”. It should be understood that the terminal device can determine on its own that the PSFCH transmission opportunity is not used, or it can receive indication information from the terminal device that initiates the COT and determine that the PSFCH transmission opportunity is not used based on the indication information. The embodiments of the present application are not limited to this.

[0273] In a possible implementation manner, when the PSSCH is sent on the time domain resource corresponding to the PSFCH sending opportunity, a signal for automatic gain control AGC is sent on the first time domain resource immediately before the PSFCH sending opportunity.

[0274] In one possible implementation, Fig.13 As shown, the time domain resource corresponding to the PSFCH transmission timing is the symbol used to send PSFCH, and the symbol immediately before the symbol used to send PSFCH is an AGC symbol, and the content sent on the AGC symbol is a copy of the content sent on the PSFCH symbol. Optionally, the GAP symbol before the AGC symbol is also used to send PSSCH. The terminal device of the embodiment of the present application can perform rate matching according to the actual number of available symbols (excluding the above-mentioned AGC symbol).

[0275] The sideline communication method of the embodiment of the present application reserves an AGC symbol as a copy of the next symbol when sending PSSCH at an idle PSFCH sending opportunity, so that the receiving end can adjust the AGC range according to the AGC symbol, thereby enhancing the demodulation performance.

[0276] As an optional embodiment, the PSFCH sending opportunity is within the first channel occupation time COT, and there is no PSFCH to be transmitted at the PSFCH sending opportunity.

[0277] As an optional embodiment, the method further includes: if there is a first reference signal to be transmitted on the first time domain resource, transmitting the first reference signal on a second time domain resource adjacent to the first time domain resource.

[0278] In a possible implementation, the first time domain resource is an AGC symbol, and the second time domain resource is a symbol adjacent to the AGC symbol. It should be understood that it is possible to predefine / (pre)configure whether the first reference signal is carried in a previous symbol adjacent to the AGC symbol or a subsequent symbol adjacent to the AGC symbol.

[0279] The first reference signal may be, for example, a demodulation reference signal (DMRS).

[0280] It should be understood that the above-mentioned "second time domain resource adjacent to the first time domain resource" refers to the previous time domain resource or the next time domain resource of the first time domain resource. Whether the first reference signal is transmitted on the previous time domain resource or the next time domain resource is pre-defined by the protocol.

[0281] It should be understood that the sequence numbers of the above processes do not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0282] Combined with the above Figures 1 to 13 , describes in detail the side communication method according to the embodiment of the present application, and will be combined with Fig.14 and Fig.15 , describe in detail the side communication device of an embodiment of the present application.

[0283] Fig.14 The side communication device 1400 provided in an embodiment of the present application is shown. The device 1400 includes: a processing unit 1410 and a transceiver unit 1420.

[0284] In a possible implementation, the device 1400 is used to execute the steps corresponding to the terminal device in the above method 600.

[0285] Among them, the processing unit 1410 is used to determine that there is a first physical sidelink shared channel PSSCH to be sent on the time domain resource corresponding to the physical sidelink feedback channel PSFCH sending opportunity within the channel occupancy time COT, and there are M PSFCHs to be sent and N PSFCHs to be received on the time domain resource, M and N are both non-negative integers, and at least one of M and N is greater than 0; the transceiver unit 1420 is used to send the first PSSCH on the time domain resource if the first condition is met; wherein the first condition includes any of the following: the first priority is higher than the second priority; or, the third priority is higher than the fourth priority; or, the layer 1 priority of the PSFCH with the highest layer 1 priority among the M PSFCHs to be sent is higher than the layer 1 priority of the PSFCH with the highest layer 1 priority among the N PSFCHs to be received, and all or part of the M PSFCHs to be sent have unused PSFCH sending opportunities; wherein the second priority is: between the M PSFCHs to be sent and the N PSFCHs to be received The layer 1 priority of the PSFCH with the highest layer 1 priority in the received PSFCH, the first priority is: the preset layer 1 priority, or the layer 1 priority associated with the COT, or the layer 1 priority of the first PSSCH; or, the second priority is the preset layer 1 priority, the first priority is the layer 1 priority associated with the COT, or the layer 1 priority of the first PSSCH; wherein the fourth priority is: the associated CAPC of the PSFCH with the highest associated channel access priority CAPC among the M PSFCHs to be sent and the N PSFCHs to be received, the third priority is: the preset CAPC priority, or the CAPC of the COT, or the CAPC of the first PSSCH, the associated CAPC is the CAPC of the PSSCH corresponding to the PSFCH, or the CAPC of the COT where the PSSCH corresponding to the PSFCH is located; or, the fourth priority is the preset CAPC priority, and the third priority is the CAPC of the COT, or the CAPC of the first PSSCH.

[0286] Optionally, the layer one priority associated with the COT is the highest priority or average priority among the layer one priorities of the PSSCH transmitted after the PSFCH sending opportunity in the COT.

[0287] Optionally, the transceiver unit 1420 is further used to: receive indication information from a terminal device that initiates the COT, where the indication information is used to indicate a layer one priority associated with the COT.

[0288] Optionally, the part of PSFCHs is the PSFCHs whose layer one priority is higher than the first priority among the M PSFCHs to be sent; or, the part of PSFCHs is the PSFCHs whose associated CAPC is higher than the third priority among the M PSFCHs to be sent.

[0289] Optionally, the part of PSFCH is M 1 Among the PSFCHs, the PSFCHs with layer 1 priority higher than the first priority; or, the part of the PSFCHs are the M 1 Among the PSFCHs, the associated CAPC is higher than the PSFCH of the third priority; wherein the M 1 A PSFCH is determined from the M PSFCHs to be sent, M 1 Less than or equal to M.

[0290] In another possible implementation, the device 1400 is used to execute the steps corresponding to the terminal device in the above method 800.

[0291] Among them, the processing unit 1410 is used to determine the first signal to be sent on the time domain resource corresponding to the sending opportunity of the physical sidelink feedback channel PSFCH within the channel occupancy time COT, and there are N PSFCHs to be received on the time domain resource, and N is an integer greater than 0; the transceiver unit 1420 is used to send the first signal on the time domain resource when the second condition is met; wherein the first signal is a redundant signal for occupying the COT, and the second condition includes any one of the following: the fifth priority is higher than the sixth priority; or, the seventh priority is higher than the eighth priority; wherein the sixth priority is: the layer one priority of the PSFCH with the highest layer one priority among the N PSFCHs to be received, and the seventh priority is higher than the eighth priority. The fifth priority level is: the preset layer one priority level, or the layer one priority level associated with the COT; or, the sixth priority level is the preset layer one priority level, and the fifth priority level is the layer one priority level associated with the COT; wherein, the eighth priority level is: the associated CAPC of the PSFCH with the highest associated channel access priority CAPC among the N PSFCHs to be received, and the seventh priority level is: the preset CAPC, or the CAPC of the COT, and the associated CAPC is the CAPC of the PSSCH corresponding to the PSFCH, or the CAPC of the COT where the PSSCH corresponding to the PSFCH is located; or, the eighth priority level is the preset CAPC priority level, and the seventh priority level is the CAPC of the COT.

[0292] Optionally, the layer one priority associated with the COT is the highest priority or average priority among the layer one priorities of the PSSCH transmitted after the PSFCH sending opportunity in the COT.

[0293] Optionally, the transceiver unit 1420 is further used to: receive indication information from a terminal device that initiates the COT, where the indication information is used to indicate a layer one priority associated with the COT.

[0294] Optionally, there are M PSFCHs to be sent on the time domain resource, where M is an integer greater than 0; the transceiver unit 1420 is further configured to: send M PSFCHs on the time domain resource. 1 PSFCH, the M 1 A PSFCH is determined from the M PSFCHs to be sent, M 1 Less than or equal to M.

[0295] Optionally, the sixth priority is: the layer 1 priority of the PSFCH with the highest layer 1 priority among the N PSFCHs to be received, and the fifth priority also includes: the preset layer 1 priority and the highest layer 1 priority among the layer 1 priorities of the M PSFCHs to be sent, or the layer 1 priority associated with the COT and the highest layer 1 priority among the layer 1 priorities of the M PSFCHs to be sent.

[0296] Optionally, the eighth priority is: the associated CAPC of the PSFCH with the highest associated CAPC among the N PSFCHs to be received, and the seventh priority also includes: the preset CAPC and the highest associated CAPC among the CAPCs of the M PSFCHs to be sent, or the CAPC of the COT and the highest CAPC among the associated CAPCs of the M PSFCHs to be sent.

[0297] It should be understood that the device 1400 here is embodied in the form of a functional unit. The term "unit" here may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (such as a shared processor, a proprietary processor or a group processor, etc.) and a memory for executing one or more software or firmware programs, a combined logic circuit and / or other suitable components that support the described functions. In an optional example, those skilled in the art can understand that the device 1400 can be specifically a terminal device in the above-mentioned embodiment, and the device 1400 can be used to execute the various processes and / or steps corresponding to the terminal device in the above-mentioned method embodiment. To avoid repetition, it will not be repeated here.

[0298] The device 1400 of each of the above-mentioned schemes has the function of implementing the corresponding steps executed by the terminal device in the above-mentioned method; the function can be implemented by hardware, or by hardware executing the corresponding software implementation. The hardware or software includes one or more modules corresponding to the above-mentioned functions. For example, the above-mentioned transceiver unit 1420 may include a sending unit and a receiving unit, the sending unit can be used to implement the various steps and / or processes for performing the sending action corresponding to the above-mentioned transceiver unit, and the receiving unit can be used to implement the various steps and / or processes for performing the receiving action corresponding to the above-mentioned transceiver unit. The sending unit can be replaced by a transmitter, and the receiving unit can be replaced by a receiver, respectively performing the sending and receiving operations and related processing operations in each method embodiment.

[0299] In the embodiments of the present application, Fig.14 The device 1400 in the embodiment may also be a chip or a chip system, such as a system on chip (SoC). Correspondingly, the transceiver unit 1410 may be a transceiver circuit of the chip, which is not limited here.

[0300] Fig.15 Another sideline communication device 1500 provided by an embodiment of the present application is shown. The device 1500 includes a processor 1510, a transceiver 1520, and a memory 1530. The processor 1510, the transceiver 1520, and the memory 1530 communicate with each other through an internal connection path, the memory 1530 is used to store instructions, and the processor 1510 is used to execute the instructions stored in the memory 1530 to control the transceiver 1520 to send signals and / or receive signals.

[0301] It should be understood that the device 1500 can be specifically a terminal device in the above embodiment, and can be used to execute the various steps and / or processes corresponding to the terminal device in the above method embodiment. Optionally, the memory 1530 may include a read-only memory and a random access memory, and provide instructions and data to the processor. A part of the memory may also include a non-volatile random access memory. For example, the memory may also store information about the device type. The processor 1510 may be used to execute instructions stored in the memory, and when the processor 1510 executes instructions stored in the memory, the processor 1510 is used to execute the various steps and / or processes of the above method embodiment corresponding to the terminal device. The transceiver 1520 may include a transmitter and a receiver, the transmitter may be used to implement the various steps and / or processes corresponding to the above transceiver for performing the sending action, and the receiver may be used to implement the various steps and / or processes corresponding to the above transceiver for performing the receiving action.

[0302] It should be understood that in the embodiments of the present application, the processor of the above-mentioned device may be a central processing unit (CPU), and the processor may also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0303] In the implementation process, each step of the above method can be completed by an integrated logic circuit of hardware in a processor or an instruction in the form of software. The steps of the method disclosed in conjunction with the embodiment of the present application can be directly embodied as a hardware processor for execution, or a combination of hardware and software units in a processor for execution. The software unit can be located in a storage medium mature in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in a memory, and the processor executes the instructions in the memory, and completes the steps of the above method in conjunction with its hardware. To avoid repetition, it is not described in detail here.

[0304] The present application also provides a computer-readable storage medium, which is used to store a computer program, and the computer program is used to implement the method corresponding to the terminal device in the above embodiment.

[0305] The present application also provides a computer program product, which includes a computer program (also referred to as code or instruction). When the computer program runs on a computer, the computer can execute the method corresponding to the terminal device shown in the above embodiment.

[0306] Those of ordinary skill in the art will appreciate that the various method steps and units described in the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the steps and components of each embodiment have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Those of ordinary skill in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0307] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0308] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, or it can be an electrical, mechanical or other form of connection.

[0309] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the embodiments of the present application.

[0310] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0311] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk and other media that can store program code.

[0312] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A side communication method, characterized in that: include: A first physical sidelink shared channel PSSCH to be sent on a time domain resource corresponding to a physical sidelink feedback channel PSFCH sending opportunity within a channel occupation time COT, and M PSFCHs to be sent and N PSFCHs to be received on the time domain resource, where both M and N are non-negative integers, and at least one of M and N is greater than 0; When a first condition is met, sending the first PSSCH on the time domain resource; The first condition includes any one of the following: The first priority is higher than the second priority; or, The third priority is higher than the fourth priority; or, The layer 1 priority of the PSFCH with the highest layer 1 priority among the M PSFCHs to be sent is higher than the layer 1 priority of the PSFCH with the highest layer 1 priority among the N PSFCHs to be received, and all or part of the M PSFCHs to be sent have unused PSFCH transmission opportunities; The second priority is: the layer 1 priority of the PSFCH with the highest layer 1 priority among the M PSFCHs to be sent and the N PSFCHs to be received, and the first priority is: the preset layer 1 priority, or the layer 1 priority associated with the COT, or the layer 1 priority of the first PSSCH; or, The second priority is a preset layer 1 priority, and the first priority is a layer 1 priority associated with the COT, or a layer 1 priority of the first PSSCH; Among them, the fourth priority is: the associated CAPC of the PSFCH with the highest associated channel access priority CAPC among the M PSFCHs to be sent and the N PSFCHs to be received, the third priority is: the preset CAPC, or the CAPC of the COT, or the CAPC of the first PSSCH, the associated CAPC is the CAPC of the PSSCH corresponding to the PSFCH, or the CAPC of the COT where the PSSCH corresponding to the PSFCH is located; or, The fourth priority is a preset CAPC, and the third priority is the CAPC of the COT, or the CAPC of the first PSSCH.

2. The method according to claim 1, characterized in that The layer one priority associated with the COT is the highest priority or average priority among the layer one priorities of the PSSCH transmitted after the PSFCH transmission opportunity in the COT.

3. The method according to claim 1 or 2, characterized in that: The method further comprises: Receive indication information from a terminal device that initiates the COT, where the indication information is used to indicate a layer 1 priority associated with the COT.

4. The method according to any one of claims 1 to 3, characterized in that The part of the PSFCHs is the PSFCHs whose layer 1 priority is higher than the first priority among the M PSFCHs to be sent; or, The part of PSFCHs is the PSFCHs whose associated CAPC is higher than the third priority among the M PSFCHs to be sent.

5. The method according to any one of claims 1 to 3, characterized in that The part of PSFCHs is a PSFCH with a layer 1 priority higher than the first priority among M1 PSFCHs; or, The part of PSFCHs is the PSFCHs of the M1 PSFCHs, the associated CAPC of which is higher than the third priority; The M1 PSFCHs are determined from the M PSFCHs to be sent, and M1 is less than or equal to M.

6. A side communication method, characterized in that: include: There is a first signal to be sent on a time domain resource corresponding to a physical sidelink feedback channel PSFCH transmission opportunity within a channel occupation time COT, and there are N PSFCHs to be received on the time domain resource, where N is an integer greater than 0; When a second condition is met, sending the first signal on the time domain resource; The first signal is a redundant signal used to occupy the COT, and the second condition includes any one of the following: The fifth priority is higher than the sixth priority; or, The seventh priority is higher than the eighth priority; The sixth priority is: the layer 1 priority of the PSFCH with the highest layer 1 priority among the N PSFCHs to be received, and the fifth priority is: the preset layer 1 priority, or the layer 1 priority associated with the COT; or, The sixth priority is a preset layer 1 priority, and the fifth priority is a layer 1 priority associated with the COT; Among them, the eighth priority is: the associated CAPC of the PSFCH with the highest associated channel access priority CAPC among the N PSFCHs to be received, the seventh priority is: the preset CAPC, or the CAPC of the COT, the associated CAPC is the CAPC of the PSSCH corresponding to the PSFCH, or the CAPC of the COT where the PSSCH corresponding to the PSFCH is located; or, The eighth priority is a preset CAPC, and the seventh priority is the CAPC of the COT.

7. The method according to claim 6, characterized in that The layer one priority associated with the COT is the highest priority or average priority among the layer one priorities of the PSSCH transmitted after the PSFCH transmission opportunity in the COT.

8. The method according to claim 6 or 7, characterized in that: The method further comprises: Receive indication information from a terminal device that initiates the COT, where the indication information is used to indicate a layer 1 priority associated with the COT.

9. The method according to any one of claims 6 to 8, characterized in that There are M PSFCHs to be sent on the time domain resource, where M is an integer greater than 0; The method further comprises: M1 PSFCHs are sent on the time domain resources, where the M1 PSFCHs are determined from the M PSFCHs to be sent, and M1 is less than or equal to M.

10. The method according to claim 9, characterized in that The sixth priority is: the layer 1 priority of the PSFCH with the highest layer 1 priority among the N PSFCHs to be received, and the fifth priority also includes: the preset layer 1 priority and the highest layer 1 priority among the layer 1 priorities of the M PSFCHs to be sent, or the layer 1 priority associated with the COT and the highest layer 1 priority among the layer 1 priorities of the M PSFCHs to be sent.

11. The method according to claim 9, characterized in that The eighth priority is: the associated CAPC of the PSFCH with the highest associated CAPC among the N PSFCHs to be received, and the seventh priority also includes: the highest CAPC among the preset CAPC and the associated CAPCs of the M PSFCHs to be sent, or the highest CAPC among the CAPCs of the COT and the associated CAPCs of the M PSFCHs to be sent.

12. A side communication device, characterized in that: include: A processing unit, configured to determine a first physical sidelink shared channel PSSCH to be sent on a time domain resource corresponding to a physical sidelink feedback channel PSFCH sending opportunity within a channel occupation time COT, where there are M PSFCHs to be sent and N PSFCHs to be received on the time domain resource, where both M and N are non-negative integers, and at least one of M and N is greater than 0; a transceiver unit, configured to send the first PSSCH on the time domain resource when a first condition is met; The first condition includes any one of the following: The first priority is higher than the second priority; or, The third priority is higher than the fourth priority; or, The layer 1 priority of the PSFCH with the highest layer 1 priority among the M PSFCHs to be sent is higher than the layer 1 priority of the PSFCH with the highest layer 1 priority among the N PSFCHs to be received, and all or part of the M PSFCHs to be sent have unused PSFCH transmission opportunities; The second priority is: the layer 1 priority of the PSFCH with the highest layer 1 priority among the M PSFCHs to be sent and the N PSFCHs to be received, and the first priority is: the preset layer 1 priority, or the layer 1 priority associated with the COT, or the layer 1 priority of the first PSSCH; or, The second priority is a preset layer 1 priority, and the first priority is a layer 1 priority associated with the COT, or a layer 1 priority of the first PSSCH; Among them, the fourth priority is: the associated CAPC of the PSFCH with the highest associated channel access priority CAPC among the M PSFCHs to be sent and the N PSFCHs to be received, the third priority is: the preset CAPC, or the CAPC of the COT, or the CAPC of the first PSSCH, the associated CAPC is the CAPC of the PSSCH corresponding to the PSFCH, or the CAPC of the COT where the PSSCH corresponding to the PSFCH is located; or, The fourth priority is a preset CAPC, and the third priority is the CAPC of the COT, or the CAPC of the first PSSCH.

13. The device according to claim 12, characterized in that The layer one priority associated with the COT is the highest priority or average priority among the layer one priorities of the PSSCH transmitted after the PSFCH transmission opportunity in the COT.

14. The device according to claim 12 or 13, characterized in that The transceiver unit is also used for: Receive indication information from a terminal device that initiates the COT, where the indication information is used to indicate a layer 1 priority associated with the COT.

15. The device according to any one of claims 12 to 14, characterized in that The part of the PSFCHs is the PSFCHs whose layer 1 priority is higher than the first priority among the M PSFCHs to be sent; or, The part of PSFCHs is the PSFCHs whose associated CAPC is higher than the third priority among the M PSFCHs to be sent.

16. The device according to any one of claims 12 to 14, characterized in that The part of PSFCHs is a PSFCH with a layer 1 priority higher than the first priority among M1 PSFCHs; or, The part of PSFCHs is the PSFCHs of the M1 PSFCHs, the associated CAPC of which is higher than the third priority; The M1 PSFCHs are determined from the M PSFCHs to be sent, and M1 is less than or equal to M.

17. A side communication device, characterized in that: include: A processing unit, configured to determine a first signal to be sent on a time domain resource corresponding to a physical sidelink feedback channel PSFCH transmission opportunity within a channel occupation time COT, where there are N PSFCHs to be received on the time domain resource, where N is an integer greater than 0; a transceiver unit, configured to send the first signal on the time domain resource when a second condition is met; The first signal is a redundant signal used to occupy the COT, and the second condition includes any one of the following: The fifth priority is higher than the sixth priority; or, The seventh priority is higher than the eighth priority; The sixth priority is: the layer 1 priority of the PSFCH with the highest layer 1 priority among the N PSFCHs to be received, and the fifth priority is: the preset layer 1 priority, or the layer 1 priority associated with the COT; or, The sixth priority is a preset layer 1 priority, and the fifth priority is a layer 1 priority associated with the COT; Among them, the eighth priority is: the associated CAPC of the PSFCH with the highest associated channel access priority CAPC among the N PSFCHs to be received, the seventh priority is: the preset CAPC, or the CAPC of the COT, the associated CAPC is the CAPC of the PSSCH corresponding to the PSFCH, or the CAPC of the COT where the PSSCH corresponding to the PSFCH is located; or, The eighth priority is a preset CAPC, and the seventh priority is the CAPC of the COT.

18. The device according to claim 17, characterized in that The layer one priority associated with the COT is the highest priority or average priority among the layer one priorities of the PSSCH transmitted after the PSFCH transmission opportunity in the COT.

19. The device according to claim 17 or 18, characterized in that The transceiver unit is also used for: Receive indication information from a terminal device that initiates the COT, where the indication information is used to indicate a layer 1 priority associated with the COT.

20. The device according to any one of claims 17 to 19, characterized in that There are M PSFCHs to be sent on the time domain resource, where M is an integer greater than 0; The transceiver unit is also used for: M1 PSFCHs are sent on the time domain resources, where the M1 PSFCHs are determined from the M PSFCHs to be sent, and M1 is less than or equal to M.

21. The device according to claim 20, characterized in that The sixth priority is: the layer 1 priority of the PSFCH with the highest layer 1 priority among the N PSFCHs to be received, and the fifth priority also includes: the preset layer 1 priority and the highest layer 1 priority among the layer 1 priorities of the M PSFCHs to be sent, or the layer 1 priority associated with the COT and the highest layer 1 priority among the layer 1 priorities of the M PSFCHs to be sent.

22. The device according to claim 20, characterized in that The eighth priority is: the associated CAPC of the PSFCH with the highest associated CAPC among the N PSFCHs to be received, and the seventh priority also includes: the highest CAPC among the preset CAPC and the associated CAPCs of the M PSFCHs to be sent, or the highest CAPC among the CAPCs of the COT and the associated CAPCs of the M PSFCHs to be sent.

23. A side communication device, characterized in that: include: A processor, wherein the processor is coupled to a memory, wherein the memory is used to store a computer program, and when the processor calls the computer program, the device is caused to execute the method according to any one of claims 1 to 11.

24. A computer-readable storage medium, characterized in that: Used to store a computer program, the computer program comprising instructions for implementing the method according to any one of claims 1 to 11.

25. A computer program product, comprising instructions, characterized in that: When the instructions are executed on a computer, the computer is caused to implement the method according to any one of claims 1 to 11.

Images