WO2024022283A1

WO2024022283A1 - Physical sidelink feedback channel (psfch) sending method and terminal

Info

Publication number: WO2024022283A1
Application number: PCT/CN2023/108857
Authority: WO
Inventors: 李萍; 纪子超; 王欢
Original assignee: 维沃移动通信有限公司
Priority date: 2022-07-27
Filing date: 2023-07-24
Publication date: 2024-02-01
Also published as: CN117527161A

Abstract

The present application relates to the technical field of communications, and discloses a physical sidelink feedback channel (PSFCH) sending method and a terminal. The PSFCH sending method in embodiments of the present application comprises: a first terminal determines M1 PSFCHs that can be simultaneously sent, the M1 PSFCHs comprising at least one PSFCH that satisfies a COT sharing condition; and the first terminal sends the M1 PSFCHs.

Description

Physical side link feedback channel PSFCH transmission method and terminal

Cross-references to related applications

This application claims priority to the Chinese patent application with application number 202210892461.9 and the invention title "Physical Side Link Feedback Channel PSFCH Transmission Method and Terminal" submitted on July 27, 2022, which is fully incorporated into this application by reference. .

Technical field

The present application belongs to the field of communication technology, and specifically relates to a physical side link feedback channel PSFCH sending method and terminal.

Background technique

Side Link (SL) transmission, that is, data transmission between terminals directly on the physical layer. NR SL supports Hybrid Automatic Repeat Request (HARQ) feedback of the Physical Sidelink Feedback Channel (PSFCH). The receiving RX terminal receives the physical side link sent by the sending TX terminal. After sharing the channel (Physical Sidelink Shared Channel, PSSCH), PSFCH needs to be sent for feedback to improve the reliability of the system.

In future communication systems, shared spectrum such as unlicensed bands can be used as a supplement to licensed bands to help operators expand services. Therefore, for those skilled in the art, there is an urgent need to implement a PSFCH transmission method for shared spectrum.

Contents of the invention

Embodiments of the present application provide a physical side link feedback channel PSFCH transmission method and terminal, which can solve the problem of how to implement a PSFCH transmission method for shared spectrum.

In the first aspect, a physical side link feedback channel PSFCH sending method is provided, including:

The first terminal determines M1 PSFCHs that can be sent simultaneously; the M1 PSFCHs include at least one PSFCH that satisfies the COT sharing condition;

The first terminal sends the M1 PSFCHs.

In the second aspect, a physical side link feedback channel PSFCH sending device is provided, including:

A processing module used to determine M1 PSFCHs that can be sent simultaneously; the M1 PSFCHs include at least one PSFCH that meets the COT sharing conditions;

A sending module, configured to send the M1 PSFCHs.

In a third aspect, a first terminal is provided. The terminal includes a processor and a memory. The memory stores programs or instructions that can be run on the processor. The program or instructions are implemented when executed by the processor. The steps of the method as described in the first aspect.

In a fourth aspect, a first terminal is provided, including a processor and a communication interface, wherein the processor is configured to determine M1 PSFCHs that can be sent simultaneously; the M1 PSFCHs include at least one PSFCH that satisfies the COT sharing condition; The communication interface is used to send the M1 PSFCHs.

In a fifth aspect, a communication system is provided, including: a first terminal and a second terminal. The first terminal can be used to perform the steps of the PSFCH sending method as described in the first aspect. The second terminal and the The first terminal communicates via the side link.

In a sixth aspect, a readable storage medium is provided. Programs or instructions are stored on the readable storage medium. When the programs or instructions are executed by a processor, the steps of the method described in the first aspect are implemented.

In a seventh aspect, a chip is provided. The chip includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the method described in the first aspect. .

In an eighth aspect, a computer program/program product is provided, the computer program/program product is stored in a storage medium, and the computer program/program product is executed by at least one processor to implement the method described in the first aspect Steps of PSFCH transmission method.

In this embodiment of the present application, the first terminal determines M1 PSFCHs that can be sent simultaneously, and sends the M1 PSFCHs; the M1 PSFCHs include at least one PSFCH that satisfies the COT sharing condition, that is, it can be guaranteed that the first terminal determines that the M1 PSFCHs can be sent simultaneously. During PSFCH, at least one PSFCH that satisfies the shared COT condition will not be discarded, and the PSFCH transmission method for shared spectrum is implemented.

Description of drawings

Figure 1 is a structural diagram of a wireless communication system applicable to the embodiment of the present application;

Figure 2 is a schematic diagram of a side-link communication scenario provided by an embodiment of the present application;

Figure 3 is a schematic diagram of side link channel resource allocation provided by an embodiment of the present application;

Figure 4 is one of the flow diagrams of the PSFCH sending method provided by the embodiment of the present application;

Figure 5 is one of the interactive flow diagrams of the PSFCH sending method provided by the embodiment of the present application;

Figure 6 is the second schematic diagram of the interaction flow of the PSFCH sending method provided by the embodiment of the present application;

Figure 7 is one of the structural schematic diagrams of the PSFCH sending device provided by the embodiment of the present application;

Figure 8 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

Figure 9 is a schematic diagram of the hardware structure of a terminal provided by an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art fall within the scope of protection of this application.

The terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects and are not used to describe a specific order or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances so that the embodiments of the present application can be practiced in sequences other than those illustrated or described herein, and that "first" and "second" are distinguished objects It is usually one type, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and/or" in the description and claims indicates at least one of the connected objects, and the character "/" generally indicates that the related objects are in an "or" relationship.

It is worth pointing out that the technology described in the embodiments of this application is not limited to Long Term Evolution (LTE)/LTE Evolution (LTE-Advanced, LTE-A) systems, and can also be used in other wireless communication systems, such as code Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access, OFDMA), Single-carrier Frequency Division Multiple Access (SC-FDMA) and other systems. The terms "system" and "network" in the embodiments of this application are often used interchangeably, and the described technology can be used not only for the above-mentioned systems and radio technologies, but also for other systems and radio technologies. The following description describes a New Radio (NR) system for example purposes, and NR terminology is used in much of the following description, but these techniques can also be applied to applications other than NR system applications, such as 6th ^generation Generation, 6G) communication system.

Figure 1 shows a block diagram of a wireless communication system to which embodiments of the present application are applicable. The wireless communication system includes a terminal 11 and a network side device 12. The terminal 11 may be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), or a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a palmtop computer, a netbook, or a super mobile personal computer. (ultra-mobile personal computer, UMPC), mobile Internet device (Mobile Internet Device, MID), augmented reality (AR)/virtual reality (VR) equipment, robots, wearable devices (Wearable Device) , vehicle-mounted equipment (VUE), pedestrian terminal (PUE), smart home (home equipment with wireless communication functions, such as refrigerators, TVs, washing machines or furniture, etc.), game consoles, personal computers (PC), teller machines or self-service Terminal devices such as mobile phones, wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), Smart wristbands, smart clothing, etc. It should be noted that the embodiment of the present application does not limit the specific type of the terminal 11. The network side device 12 may include an access network device or a core network device, where the access network device may also be called a radio access network device, a radio access network (Radio Access Network, RAN), a radio access network function or a wireless device. access network unit. Access network equipment may include base stations, WLAN access points or WiFi nodes, etc. The base stations may be called Node B, Evolved Node B (eNB), Access Point, Base Transceiver Station (BTS), Radio Base Station , radio transceiver, Basic Service Set (BSS), Extended Service Set (ESS), Home B-Node, Home Evolved B-Node, Transmitting Receiving Point (TRP) or the above Some other appropriate terminology in the field, as long as the same technical effect is achieved, the base station is not limited to specific technical terms. It should be noted that in the embodiment of this application, only the base station in the NR system is used as an example for introduction. Define the specific type of base station. Core network equipment may include but is not limited to at least one of the following: core network nodes, core network functions, mobility management entities (Mobility Management Entity, MME), access mobility management functions (Access and Mobility Management Function, AMF), session management functions (Session Management Function, SMF), User Plane Function (UPF), Policy Control Function (PCF), Policy and Charging Rules Function (PCRF), Edge Application Service Discovery function (Edge Application Server Discovery Function, EASDF), Unified Data Management (UDM), Unified Data Repository (UDR), Home Subscriber Server (HSS), centralized network configuration ( Centralized network configuration (CNC), Network Repository Function (NRF), Network Exposure Function (NEF), Local NEF (Local NEF, or L-NEF), Binding Support Function (Binding Support Function, BSF), application function (Application Function, AF), etc. It should be noted that in the embodiment of this application, only the core network equipment in the NR system is used as an example for introduction, and the specific type of the core network equipment is not limited.

First, the relevant concepts involved in the embodiments of this application are introduced:

In future communication systems, shared spectrum such as unlicensed bands can be used as a supplement to licensed bands to help operators expand services. In order to be consistent with NR deployment and maximize NR-based unlicensed access as much as possible, unlicensed frequency bands can operate in the 5GHz, 37GHz and 60GHz frequency bands. Since unlicensed frequency bands are shared by multiple radio access technologies (Radio Acess Technology, RAT), such as wireless fidelity WiFi, radar, LTE-licensed assisted access (LAA), in some areas, unlicensed frequency bands The frequency band must comply with corresponding rules when used to ensure that all devices can use the resource fairly, such as Listen Before Talk (LBT), Maximum Channel Occupancy Time (MCOT) and other rules. When a transmission node needs to send information, it needs to perform LBT first and perform power detection (ED) on surrounding nodes. When the detected power is lower than a threshold, the channel is considered idle and the transmission node can to send. Otherwise, the channel is considered busy and the transmitting node cannot send. The transmission node can be a base station, terminal, WiFi access point (AccessPoint, AP), etc. The channel time occupied by the transmitting node after it starts transmitting COT cannot exceed MCOT. In addition, according to the restrictions and Occupied Channel Bandwidth (OCB) rules, in the unlicensed frequency band, the transmission node must occupy at least 70% (60GHz) or 80% (5GHz) of the entire frequency band during each transmission.

The types of LBT commonly used in NR-U can be divided into Type1, Type2A, Type2B and Type2C.

Type1 LBT is a channel listening mechanism based on back-off. When the transmission node detects that the channel is busy, it backs off and continues listening until it detects that the channel is empty.

Type2C LBT means that the sending node does not perform LBT, that is, no LBT or immediate transmission.

Type2A and Type2B LBT are one-shot LBT, that is, the node performs an LBT before transmission. If the channel is empty, it will transmit, and if the channel is busy, it will not transmit. The difference is that Type2A performs LBT within 25us, which is suitable for sharing COT when the gap between two transmissions is greater than or equal to 25us. Type2B performs LBT within 16us, which is suitable for sharing COT when the gap between the two transmissions is equal to 16us.

Type2 LBT is suitable for LAA/eLAA/FeLAA. When sharing COT, the gap between the two transmissions is greater than or equal to 25us. eNB and terminals can use Type 2 LBT.

In addition, in the frequency band range 2-2, the types of LBT are Type1, Type2 and Type3. Type1 is a channel listening mechanism based on fallback, Type2 is one-shot LBT, which performs LBT of 5us within 8us, and Type3 does not perform LBT.

For channel occupancy time sharing on the base station side, when the base station initiates a COT, in addition to using the resources in the COT for downlink transmission, the resources in the COT can also be shared with the terminal for uplink transmission. When resources in the COT are shared with terminals for uplink transmission, the channel access methods that the terminals can use are Type 2A LBT, Type 2B LBT or Type 2C LBT.

For channel occupancy time sharing on the terminal side, when the terminal uses Type1 LBT to initiate a COT, in addition to using the resources in the COT for uplink transmission, the resources in the COT can also be shared with the base station for downlink transmission. In the NR-U system, the COT initiated by the base station sharing terminal includes two situations: one situation is the base station sharing the COT of the scheduled PUSCH; the other situation is the base station sharing the COT of the PUSCH exempted from scheduling authorization.

For side links, the side links in the LTE system are based on broadcast communication and can be used to support basic security communications of vehicle to everything (V2X), but are not suitable for other more advanced V2X services. The 5G NR system supports more advanced side-link transmission designs, such as unicast, multicast or multicast, etc., thus supporting more comprehensive service types. The side-link communication system is shown in Figure 2.

NR SL includes the following channels:

Physical sidelink control channel (PSCCH); physical sidelink shared channel (PSSCH); physical sidelink broadcast channel (PSBCH); physical sidelink feedback information (physical sidelink discovery feedback channel (PSFCH).

Among them, PSSCH allocates resources in units of sub-channels, and adopts a continuous resource allocation method in the frequency domain. The time domain resource of PSCCH is the number of symbols configured by the higher layer, and the frequency domain size is the parameter configured by the higher layer. The frequency domain resource size of PSCCH is less than or equal to the size of one subchannel, and PSCCH is located within the range of the lowest subchannel of PSSCH. An example diagram is shown in Figure 3.

The NR V2X system supports the terminal to send multiple PSFCHs on one symbol. The maximum number of PSFCHs that the terminal is allowed to send simultaneously shall not exceed the maximum number of PSFCHs to be sent N _{max, PSFCH} that is configured by the higher layer and/or limited by the terminal capability. The terminal determines the number of PSFCHs that need to be sent N _{sch, PSFCH according to the number of PSSCHs that need sidelink feedback received in multiple PSSCH time slots corresponding to the PSFCH time slots. The terminal determines the number of PSFCHs that need to be sent, N sch, PSFCH} _. The transmission power _{PSFCH of each PSFCH determined by the control rule, one} , N _{max, PSFCH} and N _{sch, PSFCH} determines the number of PSFCHs that can be sent simultaneously N _{TX, PSFCH} , that is, the terminal executes the prioritization process to obtain the PSFCHs that can be sent simultaneously. The process is as follows:

Case 1:

If N _sch,PSFCH <N _max,PSFCH , and the total superposed power of N _sch, PSFCH PSFCH (i.e., N _sch,PSFCH P _{PSFCH, one} ) does not exceed P _cmax , then N _TX,PSFCH =N _sch,PSFCH , The terminal sends N _{TX, PSFCH} PSFCH;

If N _{sch, PSFCH} < N _{max, PSFCH} , N _{sch, PSFCH,} the transmission power of PSFCH exceeds P _cmax , the terminal determines the minimum number of PSFCHs to be sent, N _{min, PSFCH} , N _{min, PSFCH} is the largest N value, satisfying N _{PSFCH, one} does not exceed P _cmax . The terminal selects N _{TX, PSFCH} PSFCH to send in order of priority from high to low. N _{TX, PSFCH} are in the range of [N _{min, PSFCH} , N _{sch, PSFCH} ].

Case 2:

If N _sch,PSFCH >N _max,PSFCH , the terminal selects N _max , _{PSFCH PSFCHs among N sch,PSFCH} PSFCHs in order from high to low according to the priority of PSFCH.

If the superimposed total power of N _{max, PSFCH} PSFCH (i.e. N _{max, PSFCH} P _{PSFCH, one} ) does not exceed P _cmax , then N _{TX, PSFCH} = N _{max, PSFCH} , and the terminal sends the selected N _{max, PSFCH} PSFCH;

If the transmit power of N _{max, PSFCH} PSFCH exceeds P _cmax , the terminal determines the minimum number of PSFCHs to be sent, N _{min, PSFCH} , N _{min, PSFCH,} as the maximum N value, satisfying N P _{PSFCH, one} does not exceed P _cmax , The terminal selects N _{TX, PSFCH} PSFCHs for transmission in order of priority from high to low. N _{TX, PSFCH} are in the range of [N _{min, PSFCH} , N _{max, PSFCH} ].

In the scenario of unlicensed spectrum, how to select PSFCH for transmission is a technical problem that needs to be solved.

SL transmission on unlicensed spectrum requires channel access to meet corresponding rules, such as Type1 LBT and Type2 LBT. If the feedback of PSFCH supports the channel access mode of Type 2 LBT using shared channel occupation, the RX terminal can use the shared COT initiated by the TX terminal to feedback PSFCH. The RX terminal uses the shared COT initiated by the TX terminal to feed back the PSFCH and needs to meet the COT sharing conditions. For example, the PSFCH sent by the RX terminal contains at least one PSFCH sent to the TX terminal. However, during the actual transmission process, there may be a situation where all PSFCH sent to the TX terminal is discarded. At this time, the RX terminal cannot use the TX terminal to initiate of shared COT. Therefore, when determining the PSFCHs that can be transmitted simultaneously, the first terminal needs to ensure that at least one PSFCH that satisfies the COT sharing condition is selected.

The PSFCH transmission method provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings through some embodiments and application scenarios.

Figure 4 is one of the schematic flow diagrams of the PSFCH sending method provided by the embodiment of the present application. As shown in Figure 4, the method provided by this embodiment includes:

Step 101: The first terminal determines M1 PSFCHs that can be sent simultaneously; the M1 PSFCHs include at least one PSFCH that satisfies the COT sharing condition;

Specifically, if the first terminal has multiple PSFCH feedbacks, and assuming that PSFCH performs Type 2 LBT, considering that the COT sharing conditions are met, if the PSFCH determined by the first terminal can be sent at the same time, it is sent to the second terminal that initiates shared COT. If all the PSFCHs are discarded, the first terminal cannot use the COT initiated by the second terminal that initiates the shared COT to feed back the PSFCH. Therefore, it needs to ensure that at least one that meets the COT sharing conditions is not discarded, for example, sent to the second terminal that initiates the shared COT. PSFCH, so M1 PSFCHs may include at least one PSFCH that meets COT sharing conditions, for example, ensuring that at least one PSFCH sent to the second terminal initiating COT sharing is not discarded when the first terminal determines the PSFCHs that can be sent simultaneously.

Step 102: The first terminal sends M1 PSFCHs.

The M1 PSFCHs may be PSFCHs sent to one or more terminals.

In the method of this embodiment, the first terminal determines M1 PSFCHs that can be sent simultaneously, and sends M1 PSFCHs; the M1 PSFCHs include at least one PSFCH that satisfies the COT sharing condition, which ensures that the first terminal determines the PSFCHs that can be sent simultaneously. When there is at least one PSFCH that meets the shared COT condition, it is not discarded, and the PSFCH transmission method for the shared spectrum is implemented.

Optionally, M1 PSFCHs may be selected from N1 PSFCHs, and the M1 PSFCHs are at least one PSFCH determined from the M2 PSFCHs that meet the COT sharing conditions, wherein the M2 PSFCHs are at least one determined from the N1 PSFCHs that can PSFCH sent at the same time.

Specifically, the first terminal performs prioritization processing on N1 PSFCHs that need to be sent simultaneously to obtain PSFCHs that can be sent simultaneously. Among the PSFCHs that can be sent simultaneously, the PSFCH that satisfies the COT sharing condition is the PSFCH that can be sent simultaneously and satisfies the COT sharing condition. Conditional PSFCH, that is, the first terminal obtains M2 PSFCHs based on N1 PSFCHs. Among the M2 PSFCHs, only M1 PSFCHs meet the COT sharing conditions. Then, the M1 PSFCHs are all PSFCHs that meet the COT sharing conditions.

Optionally, the M1 PSFCHs may be selected based on the N2 PSFCHs that satisfy the COT sharing conditions among the N1 PSFCHs. That is, the selected M1 PSFCHs include at least one PSFCH determined from the N2 PSFCHs that can be transmitted simultaneously. For example, the M1 PSFCHs may be selected. There are several ways:

method one:

M1 PSFCH includes M3 PFSCH, or includes M3 and M4 PFSCH, where M3 PSFCHs are at least one PSFCH determined from the N2 PSFCHs that can be sent simultaneously, and M4 PSFCHs are at least one PSFCH determined from the remaining N1-M3 or N1-N2 PSFCHs that need to be sent that can be sent simultaneously; N2 PSFCHs It is the PSFCH contained in the N1 PSFCHs that need to be sent simultaneously and satisfies the COT sharing conditions.

Specifically, the first terminal performs prioritization on N2 PSFCHs that need to be sent simultaneously and meet the COT sharing conditions, and obtains PSFCHs that can be sent simultaneously and meet the COT sharing conditions. That is, the first terminal obtains M3 PSFCHs and M1 PSFCHs based on the N2 PSFCHs. contains at least M3 PSFCHs to ensure that at least PSFCHs that meet the COT sharing conditions can be sent.

Further, if N2 PSFCHs are less than the maximum number of PSFCHs that the first terminal can send simultaneously, or M3 PSFCHs are less than the maximum number of PSFCHs that the first terminal can send simultaneously and the total power of the M2 PSFCHs is less than the maximum number of PSFCHs that the first terminal can send simultaneously. Transmit power, the first terminal can then perform prioritization on the remaining N1-M3 or N1-N2 PSFCHs that need to be sent to obtain the remaining PSFCHs that can be sent simultaneously, that is, the first terminal obtains M4 PSFCHs based on the N1-M3 or N1-N2 PSFCHs. , then M1 PSFCHs include M3+M4 PSFCHs.

Method two:

The M1 PSFCHs include M5 PFSCHs, or include M5 and M6 PFSCHs, where the M5 PSFCHs are at least one PSFCH that can be transmitted simultaneously determined from all PSFCHs with the highest priority among the N2 PSFCHs, and the The M6 PSFCHs are at least one PSFCH determined from the remaining N1-M5 or N1-N2 PSFCHs that need to be sent that can be sent simultaneously; the N2 PSFCHs are those contained in the N1 PSFCHs that need to be sent simultaneously and meet the COT sharing conditions. PSFCH.

Specifically, the first terminal performs prioritization on all PSFCHs with the highest priority among the N2 PSFCHs that need to be sent simultaneously and meet the COT sharing conditions, and obtain the highest priority PSFCHs that can be sent simultaneously and meet the COT sharing conditions. That is, the first terminal N2 PSFCHs result in M5 PSFCHs, that is, all PSFCHs with the highest priority among the N2 PSFCHs include: M5 PSFCHs that can be sent simultaneously. The M1 PSFCHs contain at least M5 PSFCHs to ensure that at least the one with the highest priority that meets the COT sharing conditions is The PSFCH can be sent.

Further, if the number of all PSFCHs with the highest priority among the N2 PSFCHs is less than the maximum number of PSFCHs that the first terminal can send simultaneously, or if the M5 PSFCHs are less than the maximum number of PSFCHs that the first terminal can send simultaneously and M5 PSFCHs The total power is less than the maximum transmit power of the first terminal, the first terminal can then perform prioritization on the remaining N1-M5 or N1-N2 PSFCHs that need to be sent to obtain the remaining PSFCHs that can be sent simultaneously, that is, the first terminal can perform prioritization on the remaining N1-M5 or N1-N2 PSFCHs that can be sent simultaneously. N1-N2 PSFCHs obtain M6 PSFCHs, then M1 PSFCHs include M5+M6 PSFCHs.

Optionally, the N1 PSFCHs may be PSFCHs that the first terminal needs to send simultaneously.

Optionally, the first terminal determines the PSFCH that can be sent simultaneously according to the target information;

Target information includes at least one of the following:

The channel occupancy time COT of the physical side link shared channel PSSCH corresponding to PSFCH;

The number of delayed transmissions of PSFCH;

The feedback type of PSSCH corresponding to PSFCH;

Channel access priority category CAPC;

Priority of PSFCH;

Maximum number of PSFCH sent;

The remaining maximum number of PSFCHs to send;

Maximum PSFCH transmit power;

The remaining maximum PSFCH transmit power.

For example, according to the COT where the PSSCH corresponding to the PSFCH is located, for example, the PSFCH corresponding to the PSSCH in the current COT is given priority; or the PSFCH corresponding to the PSSCH in the first COT is given priority, and the first COT is the previous COT/previous COT of the current COT. N COTs, N is an integer greater than 1.

For example, according to the number of delayed transmissions of PSFCH (delayed transmission refers to, for example, due to LBT failure, PSFCH can be delayed to the next transmission opportunity), for example, the PSFCH with a large number of delayed transmissions is sent first to avoid PSFCH being discarded and affecting subsequent communications; it is also possible For example, the PSFCH whose number of delayed transmission times is greater than the first threshold is preferably selected.

The feedback types include, for example, NACK/ACK and NACK-ONLY. According to the feedback type of the PSSCH corresponding to the PSFCH, M1 PSFCHs that can be sent simultaneously are determined. For example, the PSFCH corresponding to the PSSCH whose feedback type is NACK-ONLY can be selected first.

For example, assuming that PSFCH implements Type 1 LBT and uses the corresponding PSFCH priority to determine CAPC, then different PSFCHs correspond to different CAPCs, and the terminal can determine the PSFCHs that can be sent simultaneously based on the CAPC. For example, the PSFCH with a higher CAPC priority may be given priority; or the PSFCH with the CAPC priority greater than the second threshold may be given priority.

Among them, based on the priority of PSFCH, the maximum number of PSFCH transmissions/the remaining maximum number of PSFCH transmissions, the maximum PSFCH transmission power/the remaining maximum PSFCH transmission power, etc., solutions in related technologies can be adopted, and this application is not limited to this.

The above methods can be combined in any way. For example, the PSFCH corresponding to the PSSCH whose feedback type is NACK only can be selected first, and the PSFCH corresponding to the CAPC has a high priority. This is not limited in the embodiment of the present application.

The method of this embodiment determines the PSFCHs that can be sent simultaneously based on target information. The target information includes at least one of the following: the COT where the PSFCH corresponding to the PSSCH is located; the number of delayed transmissions of the PSFCH; the feedback type of the PSSCH corresponding to the PSFCH; CAPC; Priority; maximum number of PSFCH transmissions; maximum remaining number of PSFCH transmissions; maximum PSFCH transmission power; remaining maximum PSFCH transmission power, that is, you can consider the priority of PSFCH, the number of PSFCH transmissions or the transmission power, and you can also select PSFCHs that can be transmitted simultaneously. Consider the impact of other parameters, such as parameters related to channel access, PSFCH corresponding The impact of the COT where PSSCH is located, the number of delayed transmissions of PSFCH or CAPC, etc.

Optionally, step 101 can be implemented by at least one of the following:

In the case where the first terminal detects the shared COT, the first terminal determines M1 PSFCHs that can be transmitted simultaneously.

Optionally, the above-mentioned M1 PSFCHs can be obtained according to at least one of the priority of the PSFCH, the maximum number of PSFCHs sent/the remaining maximum number of PSFCHs sent, and the maximum PSFCH transmit power/the remaining maximum PSFCH transmit power.

Optionally, the method also includes:

The first terminal determines the shared COT used from the detected at least one shared COT, and the used shared COT includes one of the following:

At least one shared COT with the highest priority;

At least one shared COT can send the largest number of PSFCHs;

Any one or more shared COTs in at least one shared COT;

At least one shared COT can send the PSFCH with the highest priority.

Specifically, the first terminal detects L1 (L1 is an integer greater than 0) shared COTs, and the first terminal determines the shared COT to use based on at least one of the following:

The shared COT with the highest priority;

Able to send the shared COT with the largest number of PSFCHs;

Use any one or more shared COTs, including using all shared COTs;

The shared COT of the PSFCH with the highest priority can be sent.

Optionally, when the target information includes the COT where the PSSCH corresponding to the PSFCH is located, determining the PSFCHs that can be sent simultaneously can be achieved in any of the following ways:

The first terminal preferentially selects the PSFCH corresponding to the PSSCH in the current COT;

The first terminal preferentially selects the PSFCH corresponding to the PSSCH in the first COT; the first COT is the previous COT or the first N COTs of the current COT, and N is an integer greater than 1.

Specifically, when selecting PSFCHs that can be transmitted simultaneously, the PSFCH can be selected according to the COT where the PSSCH corresponding to the PSFCH is located, for example, the PSFCH corresponding to the PSSCH in the current COT is prioritized; optionally, the M1 PSFCHs can include, for example, the PSFCH in the current COT. The PSFCH corresponding to the PSSCH, or the PSFCH corresponding to the PSSCH that is not the current COT, but has a larger number of delayed transmissions or a higher priority, is not limited by the embodiments of this application;

Or, the PSFCH corresponding to the PSSCH in the first COT before the current COT is selected first.

In the above embodiment, the transmission of PSFCH may not be transmitted due to LBT failure and is delayed until the next PSFCH opportunity. Therefore, the PSFCH corresponding to the PSSCH in the previous COT can be sent first to avoid the PSFCH corresponding to the PSSCH in the previous COT exceeding the packet delay. Budget (Packet Delay Budget, PDB) restrictions.

Optionally, when the target information includes the number of delayed transmissions of PSFCH, determining the PSFCHs that can be transmitted simultaneously can be achieved in any of the following ways:

The first terminal preferentially selects the PSFCH with a large number of delayed transmissions;

The first terminal preferentially selects the PSFCH whose delayed transmission times are greater than the first threshold.

Specifically, the first terminal can determine the PSFCHs that can be sent simultaneously based on the number of delayed transmissions of the PSFCH, and give priority to the PSFCH with a larger number of delayed transmissions, for example, select at least the first PSFCH with a larger number of delayed transmissions, and can prioritize sending the delayed PSFCH. , improve communication reliability; or, preferentially select a PSFCH whose number of delayed transmissions is greater than the first threshold, that is, select at least one PSFCH whose number of delayed transmissions is greater than the first threshold.

Optionally, when the target information includes the feedback type of the PSSCH corresponding to the PSFCH, determining the PSFCHs that can be sent simultaneously can be achieved in any of the following ways:

The first terminal preferentially selects the PSFCH corresponding to the PSSCH whose feedback type is NACK only.

Specifically, the first terminal may determine the PSFCH to be sent at the same time according to the feedback type of the PSFCH, for example, give priority to the PSFCH corresponding to the PSSCH whose feedback type is NACK-ONLY. If the feedback type is NACK-ONLY and the receiving end does not receive feedback, the receiving end will think that the feedback sent by PSSCH is ACK. Therefore, if the first terminal wants to send NACK but the channel access fails, it will also be regarded as ACK. Therefore, when there is an opportunity to send a PSFCH, this type of PSFCH is sent first, which can avoid the situation that the NACK fails to be sent and is regarded as an ACK.

Optionally, when the target information includes CAPC, determining the PSFCHs that can be sent simultaneously can be achieved in any of the following ways:

The first terminal preferentially selects the PSFCH with a higher priority corresponding to the CAPC;

The first terminal preferentially selects the PSFCH whose priority corresponding to the CAPC is greater than the second threshold.

Specifically, the first terminal selects PSFCHs that can be transmitted simultaneously according to parameters related to channel access, such as CAPC, and may preferentially select a PSFCH with a high priority corresponding to the CAPC, for example, select at least one PSFCH with a high priority corresponding to the CAPC, or , the PSFCH whose priority corresponding to the CAPC is greater than the second threshold is preferably selected.

In the above embodiment, when determining the number of PSFCHs that can be sent simultaneously, the terminal considers some parameters related to channel access, such as CAPC, the current COT where the PSSCH corresponding to the PSFCH is located, the number of delayed transmissions of the PSFCH, etc., in order to achieve non- Transmit on licensed spectrum.

For example, if the first terminal has multiple PSFCH feedbacks, and assuming that the PSFCH performs Type 2 LBT, considering that the COT sharing conditions are met, if among the PSFCHs that the first terminal determines can be sent at the same time, the second terminal that initiates the sharing of COT is sent to the second terminal. If the PSFCHs are all discarded, the first terminal cannot use the COT initiated by the second terminal initiating the shared COT to feed back the PSFCH. Therefore, it is necessary to ensure that at least one PSFCH sent to the second terminal initiating the shared COT is not discarded. Therefore, it can be sent to The priority of the PSFCH of the second terminal that initiates the shared COT is increased to ensure that the first terminal has enough time to determine the PSFCH that can be sent simultaneously. One less PSFCH sent to the second terminal that initiated the shared COT will not be discarded. Optionally, the priorities of N2 PSFCHs that meet COT sharing conditions satisfy at least one of the following:

The priority of the PSFCH with the highest priority among the N2 PSFCHs is the highest priority among the N1 PSFCHs, and the priorities of the remaining PSFCHs among the N2 PSFCHs are the same as the priorities of their corresponding PSSCHs;

The priority of at least one PSFCH among the N2 PSFCHs is the highest priority among the N1 PSFCHs, and the priorities of the remaining PSFCHs among the N2 PSFCHs are the same as the priorities of their corresponding PSSCHs;

The priorities of the N2 PSFCHs are all the highest priorities among the N1 PSFCHs.

Among them, there may be one or more PSFCHs with the highest priority among the N2 PSFCHs.

Specifically, if the N1 PSFCHs that need to be sent simultaneously include N2 PSFCHs that meet the COT sharing conditions, and the terminal that initiates the sharing of COT is the second terminal, the priority of the N2 PSFCHs that meet the COT sharing conditions can be, for example, at least one priority. The priority of the PSFCH with the highest level is set to the highest priority; or, the priority of at least one PSFCH among the PSFCHs that meet the COT sharing conditions can be set to the highest priority, or the priorities of the N2 PSFCHs can be set to The highest priority. The priorities of the other PSFCHs remain unchanged and are still the priorities of their corresponding PSSCHs. The above highest priority can be the highest priority among the priorities of N1 PSFCHs, or it can be a specific priority value, for example The priority ranges from 0 to 7, with 0 representing the highest priority. For example, the specific priority value is 0. Finally, there is at least one PSFCH among the N2 PSFCHs, and it is the highest priority PSFCH among the N1 PSFCHs. Further, if Selecting the PSFCH to be sent according to the priority of the PSFCH ensures that at least one PSFCH sent to the second terminal is not discarded, and the first terminal can use the shared COT initiated by the second terminal to send the PSFCH.

Optionally, meeting COT sharing conditions includes at least one of the following:

The second terminal that initiates shared COT is the receiving end of PSFCH;

The second terminal that initiates the shared COT is in the same multicast group as the first terminal, and the shared COT is used by the second terminal to send multicast information;

The shared COT is used by the second terminal to send broadcast information;

The first terminal receives the first indication information sent by the second terminal that initiates the shared COT, and the first indication information is used to indicate that the first terminal can use the shared COT to send the PSFCH; optionally, the first indication information is carried by the PSCCH or PSSCH;

The first terminal uses the COT where the SCI demodulated by the first terminal is located to send the PSFCH;

The shared COT is used by the second terminal to send feedback information; optionally, the feedback information is carried by PSFCH;

The priority corresponding to the CAPC of the PSFCH is greater than the priority corresponding to the CAPC of the shared COT.

For example, as shown in Figure 5, in the case of unicast, the second terminal initiating the sharing of COT is the receiving end of the first terminal sending the PSFCH; in the case of multicast, the second terminal initiating the sharing of COT communicates with the first terminal. The terminals are in the same multicast, and the shared COT is used by the second terminal to send multicast information; in the case of broadcast, the shared COT is used by the second terminal to send broadcast information, and the second terminal is the terminal that initiated the shared COT. , then use The PSFCH sent by the shared COT meets the COT sharing conditions;

Or, the first indication information indicates that the first terminal can use the shared COT to send the PSFCH; the shared COT is initiated by the second terminal, and the PSFCH sent by the first terminal using the shared COT satisfies the COT sharing condition;

Or, the first terminal may use the COT where its demodulated SCI is located to send the PSFCH, and the PSFCH sent using the COT where the SCI is located satisfies the COT sharing condition.

Or, the shared COT is used by the second terminal to send feedback information, the shared COT is initiated by the second terminal, and the PSFCH (sent by the first terminal) sent using the shared COT satisfies the COT sharing condition;

Or, the priority corresponding to the CAPC of the PSFCH is greater than the priority corresponding to the CAPC of the shared COT, then the PSFCH meets the COT sharing condition, and the PSFCH can be sent using the shared COT.

In the above embodiment, when the N1 PSFCHs include N2 PSFCHs that meet the COT sharing conditions, the priority of at least one PSFCH among the priorities of the N2 PSFCHs that meet the COT sharing conditions is the highest priority, and then the priority of the PSFCH can be based on the PSFCH The priority of selecting the PSFCH to be sent can ensure that at least one PSFCH sent to the second terminal is not discarded, and the first terminal can use the shared COT initiated by the second terminal to send the PSFCH, thereby improving resource utilization.

Optionally, step 102 can be implemented in the following manner:

The terminal determines to use the shared COT to simultaneously send M1 PSFCHs based on at least one of the following:

When there is at least one PSFCH that satisfies the COT sharing condition among the M1 PSFCHs, the first terminal uses the shared COT to send the M1 PSFCHs;

As shown in Figure 6, when there is at least one PSFCH that meets the target condition, the first terminal uses the shared COT to send M1 PSFCHs; the M1 PSFCHs do not include the PSFCH sent to the second terminal that initiates the shared COT;

In the case where M1 PSFCHs are within the duration range of the shared COT, the first terminal uses the shared COT to send M1 PSFCHs;

The target conditions include at least one of the following: feedback type is NACK only, feedback value is ACK, and COT sharing conditions are met.

Specifically, after the first terminal selects M1 PSFCHs from N1 PSFCHs, the first terminal determines whether the M1 PSFCHs can be sent simultaneously using the shared COT according to at least one of the following: Whether PSFCH is discarded determines whether to use the shared COT.

If there is at least one PSFCH among the M1 PSFCHs that satisfies the COT sharing condition (for example, is sent to the second terminal), the first terminal uses the shared COT to send the M1 PSFCHs; otherwise, the first terminal does not use the shared COT to send the M1 PSFCHs. PSFCH.

If the first terminal has at least one PSFCH that meets the following conditions, the first terminal does not send the PSFCH to the second terminal that initiates the shared COT, but the first terminal can use the shared COT to send M1 PSFCHs, that is, the M1 PSFCHs are not Including PSFCHs sent to the second terminal that initiates shared COT. For example, the M1 PSFCHs are PSFCHs sent to the third terminal. The third terminal can be one terminal or multiple terminals. end:

The feedback type is NACK-ONLY, the feedback value is ACK, or the COT sharing conditions are met (for example, sent to the second terminal);

If M1 PSFCHs are within the duration range of the shared COT, then the first terminal uses the shared COT to send M1 PSFCHs; otherwise, the first terminal does not use the shared COT to send M1 PSFCHs.

Optionally, the method also includes:

In the case where the first terminal does not use the shared COT to send the M1 PSFCHs, the first terminal performs at least one of the following:

Discard M1 PSFCH;

Discard N1 PSFCH;

Execute Type1 LBT. If Type1 LBT is executed successfully, M1 PSFCHs are sent.

Specifically, if the first terminal does not use the shared COT to send M1 PSFCHs, the first terminal performs at least one of the following behaviors:

Discard M1 PSFCHs, or discard N1 PSFCHs that need to be sent, or perform Type1 LBT. If Type1 LBT is successful, send M1 PSFCHs.

In the above embodiment, when there is at least one PSFCH that satisfies the COT sharing condition among the M1 PSFCHs, there is at least one PSFCH that satisfies the target condition, and the M1 PSFCHs are within the duration range of the shared COT, the shared COT can be used to send M1 A PSFCH can improve resource utilization.

For example, the first terminal needs to send N1 PSFCHs at the same time, where the N1 PSFCHs include N2 PSFCHs that meet COT sharing conditions. One of the COT sharing conditions that meets the COT sharing conditions is that the receiving end of the PSFCH is the second terminal that initiates COT.

Optionally, the priorities of N2 PSFCHs that meet COT sharing conditions can be determined according to any of the following:

a) The priority of at least one PSFCH with the highest priority among the N2 PSFCHs that meet the COT sharing conditions is the highest priority, and the priorities of the remaining PSFCHs that meet the COT sharing conditions are the same as the priorities of their corresponding PSSCHs;

b) The priority of at least one PSFCH that meets the COT sharing conditions is the highest priority, and the priorities of the remaining PSFCHs that meet the COT sharing conditions are the same as the priorities of their corresponding PSSCHs;

c) The priorities of N2 PSFCHs that meet the COT sharing conditions are all the highest priority;

The first terminal determines M1 PSFCHs that can be transmitted simultaneously from N2 PSFCHs in the following manner (that is, the first terminal determines the M1 PSFCHs that can be transmitted simultaneously from the N2 PSFCHs according to the priority of the PSFCH, the maximum number of PSFCH transmissions, and the maximum PSFCH transmission power):

If N2 < N _{max, PSFCH} , and the total superimposed power of N2 PSFCH does not exceed P _cmax , then M1 = N2, and the first terminal sends N2 PSFCH;

If N2<N _{max, PSFCH} , the transmission power of N2 PSFCH exceeds P _cmax , the first terminal determines the transmitted The minimum number of PSFCHs N _{min, PSFCH} , N _{min, PSFCH} is the maximum N value, satisfying N P _{PSFCHs, one} does not exceed P _cmax . The first terminal selects N2 PSFCHs in order from high to low priority. M1 PSFCHs are sent, and M1 is in the range of [N _{min, PSFCH} , N2].

If N2>N _max,PSFCH , the first terminal selects N _max,PSFCH PSFCHs from the N2 PSFCHs in order from high to low according to the priorities of the PSFCHs.

If the superimposed total power of N _{max, PSFCH} PSFCH (ie N _{max, PSFCH} P _{PSFCH, one} ) does not exceed P _cmax , then M1=N _{max, PSFCH} , and the first terminal sends the selected N _{max, PSFCH} PSFCH ;

If N _{max, PSFCH} , the transmission power of PSFCH exceeds P _cmax , the first terminal determines the minimum number of PSFCH to send N _{min, PSFCH} , N _{min, PSFCH} is the maximum N value, satisfying N P _{PSFCH, one} does not exceed P _cmax , the first terminal selects M1 PSFCHs for transmission in order of priority from high to low, and M1 is in the range of [N _{min, PSFCH} , N _{max, PSFCH} ].

Or the first terminal determines M1 PSFCHs that can be sent simultaneously from N2 PSFCHs according to the following method:

If N2 < N _{max, PSFCH} , the transmission power of N2 PSFCH exceeds P _cmax , the first terminal determines the minimum number of PSFCHs to be sent, N _{min, PSFCH} , N _{min, PSFCH} is the largest N value, satisfying N P _{PSFCH, one} does not exceed P _cmax , the first terminal selects M1 PSFCHs that satisfy at least one of the following among N2 PSFCHs, and M1 is in the range of [N _{min, PSFCH} , N2]:

Prioritize the PSFCH corresponding to the PSSCH in the current COT;

Prioritize the PSFCH with a large number of delayed transmissions;

Prioritize the PSFCH corresponding to the PSSCH whose transmission type is NACK-ONLY;

In order of priority from high to low.

If N2>N _max,PSFCH , the first terminal selects _Nmax, PSFCH PSFCHs that satisfy at least one of the following among N2 PSFCHs according to the priority of PSFCH:

Prioritize the PSFCH corresponding to the PSSCH in the current COT;

Prioritize the PSFCH with a large number of delayed transmissions;

In order of priority from high to low.

If N _{max, PSFCH} , the transmission power of PSFCH exceeds P _cmax , the first terminal determines the minimum number of PSFCH to send N _{min, PSFCH} , N _{min, PSFCH} is the maximum N value, satisfying N P _{PSFCH, one} does not exceed P _cmax , the first terminal selects M1 PSFCHs that satisfy at least one of the following among N _{max, PSFCH} PSFCHs, and M1 is in the range of [N _{min, PSFCH} , N _{max, PSFCH} ]:

Prioritize the PSFCH corresponding to the PSSCH in the current COT;

Prioritize the PSFCH with a large number of delayed transmissions;

In order of priority from high to low.

It can be seen that the first terminal determines that the M1 PSFCHs actually sent simultaneously are selected from the N2 PSFCHs that meet the COT sharing conditions in order of priority from high to low. It can be guaranteed that there is at least one PSFCH that meets the COT sharing conditions. is discarded, the first terminal can send the PSFCH using the shared COT initiated by the second terminal.

Exemplarily, after the first terminal determines M1 PSFCHs that can be sent simultaneously, the first terminal determines whether to use the M1 PSFCHs sent simultaneously using the shared COT initiated by the second terminal according to at least one of the following:

If there is at least one PSFCH among the M1 PSFCHs that meets the COT sharing conditions, and one of the conditions for meeting the COT sharing is that the receiving end of the PSFCH is the second terminal that initiates the shared COT, then the first terminal uses the shared COT to send M1 PSFCHs; otherwise , the first terminal does not use the shared COT to send M1 PSFCHs.

If the first terminal has at least one PSFCH whose feedback type is NACK-ONLY, whose feedback value is ACK, and which satisfies the COT sharing conditions, the first terminal will not send the PSFCH to the second terminal, but the first terminal can use the sharing COT sends M1 PSFCHs, that is, the M1 PSFCHs do not include the PSFCH sent to the second terminal;

If the M1 PSFCHs are within the duration range of the COT, the first terminal uses the shared COT to send the M1 PSFCHs; otherwise, the first terminal does not use the shared COT to send the M1 PSFCHs.

Optionally, the M2 PSFCHs that can be transmitted simultaneously can be determined from the N1 PSFCHs, and the above methods can also be used, which will not be described again here.

For example, the first terminal needs to send N1 PSFCHs at the same time. The N1 PSFCHs include N2 PSFCHs that meet the COT sharing conditions. The first terminal determines M1 PSFCHs according to the following rules. The M1 PSFCHs are PSFCHs that can be sent simultaneously. M1 Each PSFCH contains at least one PSFCH that meets the COT sharing conditions:

The first terminal determines M3 PSFCHs that can be sent simultaneously from N2 PSFCHs according to the following method:

If N2<N _{max, PSFCH} , and the total superimposed power of N2 PSFCH does not exceed P _cmax , then M3=N2;

If N2 < N _{max, PSFCH} , the transmission power of N2 PSFCH exceeds P _cmax , the first terminal determines the minimum number of PSFCHs to be sent, N _{min, PSFCH} , N _{min, PSFCH} is the largest N value, satisfying N P _{PSFCH, one} does not exceed P _cmax , and the first terminal selects M3 PSFCHs in order from high to low among the N2 PSFCHs, and M3 is in the range of [N _{min, PSFCH} , N2].

If the total superposed power of N _{max, PSFCH} PSFCH (i.e. N _{max, PSFCH} P _{PSFCH, one} ) does not exceed P _cmax , then M3=N _max,PSFCH ;

If N _{max, PSFCH} , the transmission power of PSFCH exceeds P _cmax , the first terminal determines the minimum number of PSFCH to send N _{min, PSFCH} , N _{min, PSFCH} is the maximum N value, satisfying N P _{PSFCH, one} does not exceed P _cmax , the first terminal selects M3 PSFCHs in order from high to low priority, and M3 is in the range of [N _{min, PSFCH} , N _{max, PSFCH} ].

The first terminal determines M4 PSFCHs that can be sent simultaneously from the remaining N1-M3 PSFCHs that need to be sent:

If N1-M3 <N _{max, PSFCH} ′ (N′ _{max, PSFCH} is the remaining maximum number of PSFCH transmissions), and the total superimposed power of N1-M3 PSFCHs does not exceed P _cmax ′ (P _cmax ′ is the remaining maximum transmission power), Then M4=N1-M3;

If N1-M3<N _{max, PSFCH} ′, the transmission power of N1-M3 PSFCH exceeds P _cmax ′, the first terminal determines the minimum number of PSFCHs to be sent, N _{min, PSFCH} ′, N _{min, PSFCH} ′ as the maximum N ' value satisfies N' P _{PSFCH, one} does not exceed P _cmax ′, the first terminal selects M4 PSFCH among N1-M3 PSFCH in order from high to low priority, M4 is in [N _{min, PSFCH} ′, N1-M3] range.

If N1-M3>N _max,PSFCH ', the first terminal selects _Nmax,PSFCH ' PSFCHs from the N1-M3 PSFCHs in order from high to low according to the priority of the PSFCH.

If the total superimposed power of N _max,PSFCH ′ PSFCH does not exceed P _cmax ′, then M4=N _max,PSFCH ′;

If the transmission power of N _{max, PSFCH} ′ PSFCH exceeds P _cmax ′, the first terminal determines the minimum number of PSFCHs to be sent, N _{min, PSFCH} ′, N _{min, PSFCH} ′, as the maximum N′ value, satisfying N′ P _{PSFCH, one} does not exceed P _cmax ′. The first terminal selects M4 PSFCHs in order from high to low priority, and M4 is in the range of [N _{min, PSFCH} , N _{max, PSFCH} ′].

The M1 PSFCHs determined by the first terminal are M3 PSFCHs and M4 PSFCHs.

or,

If N2 < N _{max, PSFCH} , the transmission power of N2 PSFCH exceeds P _cmax , the first terminal determines the minimum number of PSFCHs to be sent, N _{min, PSFCH} , N _{min, PSFCH} is the largest N value, satisfying N P _{PSFCH, one} does not exceed P _cmax , the first terminal selects M3 PSFCHs that satisfy at least one of the following among N2 PSFCHs, and M3 is in the range of [N _{min, PSFCH} , N2]:

Prioritize the PSFCH corresponding to the PSSCH in the current COT;

Prioritize the PSFCH with a large number of delayed transmissions;

Prioritize the PSFCH corresponding to the PSSCH whose feedback type is NACK-ONLY;

In order of priority from high to low.

If N2>N _max,PSFCH , the terminal selects Nmax _, PSFCH PSFCHs that satisfy at least one of the following among N2 PSFCHs according to the priority of PSFCH:

Prioritize the PSFCH corresponding to the PSSCH in the current COT;

Prioritize the PSFCH with a large number of delayed transmissions;

In order of priority from high to low.

If the superimposed total power of N _max,PSFCH PSFCH (i.e. N _max,PSFCH P _PSFCH,one ) does not exceed P _cmax , then M3=N _max,PSFCH ;

If N _{max, PSFCH} , the transmission power of PSFCH exceeds P _cmax , the first terminal determines the minimum number of PSFCH to send N _{min, PSFCH} , N _{min, PSFCH} is the maximum N value, satisfying N P _{PSFCH, one} does not exceed P _cmax , the first terminal selects M3 PSFCHs that satisfy at least one of the following among N _{max, PSFCH} PSFCHs, and M3 is in the range of [N _{min, PSFCH} , N _{max, PSFCH} ]:

Prioritize the PSFCH corresponding to the PSSCH in the current COT;

Prioritize the PSFCH with a large number of delayed transmissions;

In order of priority from high to low.

The first terminal determines M4 PSFCHs that can be sent simultaneously from the remaining N1-M3 PSFCHs that need to be sent.

If N1-M3 <N _{max, PSFCH} ′ (N _{max, PSFCH} is the remaining maximum number of PSFCH transmissions), and the total superimposed power of N1-M3 PSFCHs does not exceed P _cmax ′ (P _cmax ′ is the remaining maximum transmission power), then M4=N1-M3;

If N1-M3<N _{max, PSFCH} ′, the transmission power of N1-M3 PSFCH exceeds P _cmax ′, the first terminal determines the minimum number of PSFCHs to be sent, N _{min, PSFCH} ′, N _{min, PSFCH} ′ as the maximum N ' value satisfies N' P _{PSFCH, one} does not exceed _P _cm _a -M3] range.

Prioritize the PSFCH corresponding to the PSSCH in the current COT;

Prioritize the PSFCH with a large number of delayed transmissions;

In order of priority from high to low.

If N1-M3>N _max,PSFCH ′, the terminal selects N _max,PSFCH ′ PSFCHs that satisfy at least one of the following among N1-M3 PSFCHs:

Prioritize the PSFCH corresponding to the PSSCH in the current COT;

Prioritize the PSFCH with a large number of delayed transmissions;

In order of priority from high to low.

If the transmission power of N _{max, PSFCH} ′ PSFCH exceeds P _cmax ′, the first terminal determines the PSFCH to send The minimum number N _{min, PSFCH} ′, N _{min, PSFCH} ′ is the maximum N′ value, satisfying N′ P _{PSFCHs, one} does not exceed P _cmax ′, the terminal selects M4 PSFCHs that satisfy at least one of the following, M4 is in [N _{min, PSFCH} , N _{max, PSFCH} ′] range.

Prioritize the PSFCH corresponding to the PSSCH in the current COT;

Prioritize the PSFCH with a large number of delayed transmissions;

In order of priority from high to low.

The M1 PSFCHs determined by the first terminal are M3 PSFCHs and M4 PSFCHs.

For the PSFCH sending method provided by the embodiment of the present application, the execution subject may be a PSFCH sending device. In the embodiment of this application, the PSFCH sending device performing the PSFCH sending method is used as an example to describe the PSFCH sending device provided by the embodiment of this application.

Figure 7 is one of the structural schematic diagrams of the PSFCH sending device provided by the embodiment of the present application. As shown in Figure 7, the PSFCH sending device provided in this embodiment includes:

The processing module 210 is used to determine M1 PSFCHs that can be transmitted simultaneously; the M1 PSFCHs include at least one PSFCH that meets the COT sharing condition;

The sending module 220 is configured to send the M1 PSFCHs.

Optionally, in the case where the first terminal determines M1 PSFCHs based on N1 PSFCHs, the M1 PSFCHs are at least one PSFCH determined among the M2 PSFCHs that satisfy the COT sharing condition, wherein the M2 PSFCHs are from At least one determined PSFCH among the N1 PSFCHs can be sent simultaneously.

Optionally, in the case where the first terminal determines M1 PSFCHs based on N2 PSFCHs, the M1 PSFCHs include M3 PFSCHs, or include M3 and M4 PFSCHs, where the M3 PSFCHs are from N2 At least one PSFCH determined among the PSFCHs can be sent simultaneously, and the M4 PSFCHs are at least one PSFCH determined to be sent simultaneously among the remaining N1-M3 or N1-N2 PSFCHs that need to be sent; the N2 PSFCHs are required PSFCHs that meet the COT sharing conditions contained in the N1 PSFCHs sent at the same time.

Optionally, in the case where the first terminal determines M1 PSFCHs based on N2 PSFCHs, the M1 PSFCHs include M5 PFSCHs, or include M5 and M6 PFSCHs, where the M5 PSFCHs are from N2 At least one PSFCH determined among all PSFCHs with the highest priority in the PSFCH can be sent simultaneously. The M6 PSFCHs are at least one PSFCH determined among the remaining N1-M5 or N1-N2 PSFCHs that need to be sent. ; The N2 PSFCHs are PSFCHs that meet the COT sharing conditions contained in the N1 PSFCHs that need to be sent simultaneously.

Optionally, in the case where the M1 PSFCHs include M3 and M4 PFSCHs, the M4 PFSCHs are N1-M3 or N1- that the first terminal needs to send from the remaining ones if the first condition is met. Determined among N2 PSFCHs, the first condition includes: N2 PSFCHs are smaller than the first terminal's ability to simultaneously The maximum number of PSFCHs sent, or M3 PSFCHs, is less than the maximum number of PSFCHs that the first terminal can send simultaneously and the total power of M2 PSFCHs is less than the maximum transmission power of the first terminal.

Optionally, in the case where the M1 PSFCHs include M5 and M6 PFSCHs, the M5 PFSCHs are the remaining N1-M5 or N1-N2 that the first terminal needs to send if the second condition is met. Determined among PSFCHs, the second condition includes: the number of all PSFCHs with the highest priority among the N2 PSFCHs is less than the maximum number of PSFCHs that the first terminal can send simultaneously, or M5 PSFCHs are less than the first The maximum number of PSFCHs that the terminal can transmit simultaneously and the total power of M5 PSFCHs is less than the maximum transmission power of the first terminal.

Optionally, the meeting of COT sharing conditions includes at least one of the following:

The second terminal that initiates shared COT is the receiving end of the PSFCH;

The second terminal that initiates the shared COT is in the same groupcast as the first terminal, and the shared COT is used by the second terminal to send multicast information;

The shared COT is used to initiate the second terminal of the shared COT to send broadcast information;

The first terminal receives the first indication information sent by the second terminal that initiates the shared COT, and the first indication information is used to indicate that the first terminal can use the shared COT to send the PSFCH;

The first terminal sends the PSFCH using the COT where the SCI demodulated by the first terminal is located;

The shared COT is used to initiate the second terminal of the shared COT to send feedback information;

Optionally, the first indication information is carried by PSCCH or PSSCH; and/or,

The feedback information is carried by PSFCH.

Optionally, the processing module 210 is specifically used for:

When the first terminal detects a shared COT, M1 PSFCHs that can be sent simultaneously are determined.

Optionally, the processing module 210 is also used to:

The used shared COT is determined from the detected at least one shared COT, and the used shared COT includes one of the following:

The shared COT with the highest priority among the at least one shared COT;

The shared COT that can send the largest number of PSFCHs among the at least one shared COT;

Any one or more shared COTs among the at least one shared COT;

Among the at least one shared COT, the shared COT capable of sending the PSFCH with the highest priority.

Optionally, in the case where the N1 PSFCHs include N2 PSFCHs that meet COT sharing conditions, the priorities of the N2 PSFCHs that meet COT sharing conditions satisfy at least one of the following:

The priority of the PSFCH with the highest priority among the N2 PSFCHs is the highest priority among the N1 PSFCHs, and the priorities of the remaining PSFCHs among the N2 PSFCHs are the same as the priorities of their respective corresponding PSSCHs;

The priority of at least one of the N2 PSFCHs is the highest priority of the N1 PSFCHs, and the priorities of the remaining PSFCHs among the N2 PSFCHs are the same as the priorities of their respective corresponding PSSCHs;

Optionally, the sending module 220 is specifically used to:

The M1 PSFCHs are sent simultaneously using a shared COT determined according to at least one of the following:

When there is at least one PSFCH that satisfies the COT sharing conditions among the M1 PSFCHs, use the shared COT to send the M1 PSFCHs;

In the case where there is at least one PSFCH that meets the target condition, use the shared COT to send the M1 PSFCHs; the M1 PSFCHs do not include the PSFCH sent to the second terminal that initiates the shared COT;

In the case where the M1 PSFCHs are within the duration range of the shared COT, send the M1 PSFCHs using the shared COT;

Optionally, the processing module 210 is also used to:

Without using the shared COT to send the M1 PSFCHs, perform at least one of the following:

Discard M1 PSFCH;

Discard N1 PSFCH;

Execute Type1 LBT. If Type1 LBT is executed successfully, the sending module 220 is used to send M1 PSFCHs.

Optionally, the processing module 210 is also used to:

Determine the PSFCHs that can be sent simultaneously based on the target information;

The target information includes at least one of the following:

The number of delayed transmissions of PSFCH;

The feedback type of PSSCH corresponding to PSFCH;

Channel access priority category CAPC;

PSFCH priority;

Maximum number of PSFCH sent;

The remaining maximum number of PSFCHs to send;

Maximum PSFCH transmit power;

The remaining maximum PSFCH transmit power.

Optionally, when the target information includes the COT where the PSSCH corresponding to the PSFCH is located, the processing module 210 is specifically configured to perform one of the following:

Prioritize the PSFCH corresponding to the PSSCH in the current COT;

The PSFCH corresponding to the PSSCH in the first COT is preferentially selected; the first COT is the previous COT or the first N COTs of the current COT, and the N is an integer greater than 1.

Optionally, when the target information includes the number of delayed transmissions of the PSFCH, the processing module 210 is specifically configured to perform one of the following:

Prioritize the PSFCH with a large number of delayed transmissions;

The PSFCH whose number of delayed transmission times is greater than the first threshold is preferably selected.

Optionally, when the target information includes the feedback type of the PSSCH corresponding to the PSFCH, the processing module 210 is specifically configured to:

The PSFCH corresponding to the PSSCH whose feedback type is NACK only is preferably selected.

Optionally, in the case where the target information includes the CAPC, the processing module 210 is specifically configured to perform one of the following:

Prioritize the PSFCH with high priority corresponding to CAPC;

The PSFCH whose priority corresponding to the CAPC is greater than the second threshold is preferably selected.

The device of this embodiment can be used to execute the method of any of the foregoing terminal-side method embodiments. Its specific implementation process and technical effects are the same as those in the terminal-side method embodiments. For details, please refer to the terminal-side method embodiments. Detailed introduction will not be repeated here.

The PSFCH transmitting device in the embodiment of the present application may be an electronic device, such as an electronic device with an operating system, or may be a component in the electronic device, such as an integrated circuit or chip. The electronic device may be a terminal or other devices other than the terminal. For example, terminals may include but are not limited to the types of terminals 11 listed above, and other devices may be servers, network attached storage (Network Attached Storage, NAS), etc., which are not specifically limited in the embodiment of this application.

The PSFCH sending device provided by the embodiment of the present application can implement each process implemented by the method embodiments of Figure N to Figure N+x, and achieve the same technical effect. To avoid duplication, details will not be described here.

Optionally, as shown in Figure 8, this embodiment of the present application also provides a communication device 800, which includes a processor 801 and a memory 802. The memory 802 stores programs or instructions that can be run on the processor 801, such as , when the communication device 800 is a terminal, when the program or instruction is executed by the processor 801, each step of the above-mentioned PSFCH sending method embodiment is implemented, and the same technical effect can be achieved. When the communication device 800 is a second terminal, when the program or instruction is executed by the processor 801, each step of the above-mentioned PSFCH sending method embodiment is implemented, and the same technical effect can be achieved. To avoid duplication, the details will not be described here.

The embodiment of the present application also provides a first terminal, including a processor and a communication interface. The processor is used to determine M1 PSFCHs that can be sent simultaneously; the M1 PSFCHs include at least one PSFCH that satisfies the COT sharing condition; the communication interface is used to send all PSFCHs. Describe M1 PSFCHs. This terminal embodiment corresponds to the above-mentioned terminal-side method embodiment, and each implementation process and implementation manner of the above-mentioned method embodiment can be applied to this terminal embodiment. , and can achieve the same technical effect. Specifically, FIG. 9 is a schematic diagram of the hardware structure of a terminal that implements an embodiment of the present application.

The terminal 1000 includes but is not limited to: radio frequency unit 1001, network module 1002, audio output unit 1003, input unit 1004, sensor 1005, display unit 1006, user input unit 1007, interface unit 1008, memory 1009, processor 1010, etc. at least some parts of it.

Those skilled in the art can understand that the terminal 1000 may also include a power supply (such as a battery) that supplies power to various components. The power supply may be logically connected to the processor 1010 through a power management system, thereby managing charging, discharging, and power consumption through the power management system. Management and other functions. The terminal structure shown in FIG. 9 does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown in the figure, or may combine certain components, or arrange different components, which will not be described again here.

It should be understood that in the embodiment of the present application, the input unit 1004 may include a graphics processing unit (Graphics Processing Unit, GPU) 10041 and a microphone 10042. The graphics processor 10041 is responsible for the image capture device (GPU) in the video capture mode or the image capture mode. Process the image data of still pictures or videos obtained by cameras (such as cameras). The display unit 1006 may include a display panel 10061, which may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 1007 includes a touch panel 10071 and at least one of other input devices 10072 . Touch panel 10071, also known as touch screen. The touch panel 10071 may include two parts: a touch detection device and a touch controller. Other input devices 10072 may include, but are not limited to, physical keyboards, function keys (such as volume control keys, switch keys, etc.), trackballs, mice, and joysticks, which will not be described again here.

In this embodiment of the present application, after receiving downlink data from the network side device, the radio frequency unit 1001 can transmit it to the processor 1010 for processing; in addition, the radio frequency unit 1001 can send uplink data to the network side device. Generally, the radio frequency unit 1001 includes, but is not limited to, an antenna, at least one amplifier, transceiver, coupler, low noise amplifier, duplexer, etc.

Memory 1009 may be used to store software programs or instructions as well as various data. The memory 1009 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage program or instruction area may store an operating system, an application program or instructions required for at least one function (such as a sound playback function, image playback function, etc.), etc. Additionally, memory 1009 may include volatile memory or nonvolatile memory, or memory 1009 may include both volatile and nonvolatile memory. Including high-speed random access memory, it can also include non-volatile memory, where the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), programmable read-only memory (Programmable ROM, PROM), Erasable programmable read-only memory (Erasable PROM, EPROM), electrically erasable programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. Volatile memory can be random access memory (Random Access Memory, RAM), static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic Random Access Memory (Double Data Rate SDRAM, DDRSDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (Synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DRRAM). Memory 1009 in embodiments of the present application includes, but is not limited to, these and any other suitable type of memory such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device.

The processor 1010 may include one or more processing units; optionally, the processor 1010 may integrate an application processor and a modem processor, where the application processor mainly processes operating systems, user interfaces, application programs or instructions, etc. In operation, the modem processor mainly processes wireless communication signals, such as the baseband processor. It can be understood that the above modem processor may not be integrated into the processor 1010.

Among them, the processor 1010 is used to determine M1 PSFCHs that can be transmitted simultaneously; the M1 PSFCHs include at least one PSFCH that satisfies the COT sharing condition;

Radio frequency unit 1001, configured to send the M1 PSFCHs.

Optionally, in the case where the M1 PSFCHs include M3 and M4 PFSCHs, the M4 PFSCHs are N1-M3 or N1- that the first terminal needs to send from the remaining ones if the first condition is met. Determined among N2 PSFCHs, the first condition includes: N2 PSFCHs are less than the maximum number of PSFCHs that the first terminal can send simultaneously, or M3 PSFCHs are less than the maximum number of PSFCHs that the first terminal can send simultaneously. The total power of M2 PSFCHs is less than the maximum transmit power of the first terminal.

Optionally, in the case where the M1 PSFCHs include M5 and M6 PFSCHs, the M5 PFSCHs are the remaining N1-M5 or N1-N2 that the first terminal needs to send if the second condition is met. Determined among N2 PSFCHs, the second condition includes: all PSFCHs with the highest priority among N2 PSFCHs The number of M5 PSFCHs is less than the maximum number of PSFCHs that the first terminal can send simultaneously, or the M5 PSFCHs are less than the maximum number of PSFCHs that the first terminal can send simultaneously and the total power of the M5 PSFCHs is less than the first terminal. Maximum transmit power.

The feedback information is carried by PSFCH.

Optionally, the processor 1010 is specifically used to:

Optionally, the processing module 210 is also used to:

The shared COT with the highest priority among the at least one shared COT;

Any one or more shared COTs among the at least one shared COT;

Optionally, the radio frequency unit 1001 is specifically used for:

The M1 PSFCHs are sent simultaneously using the shared COT determined according to at least one of the following:

In the case where the M1 PSFCHs are within the duration range of the shared COT, use the shared COT to send the M1 PSFCHs;

Optionally, the processor 1010 is also used to:

Discard M1 PSFCH;

Discard N1 PSFCH;

Optionally, the processor 1010 is also used to:

The target information includes at least one of the following:

The number of delayed transmissions of PSFCH;

The feedback type of PSSCH corresponding to PSFCH;

Channel access priority category CAPC;

Priority of PSFCH;

Maximum number of PSFCH sent;

The remaining maximum number of PSFCHs to send;

Maximum PSFCH transmit power;

The remaining maximum PSFCH transmit power.

Optionally, when the target information includes the COT where the PSSCH corresponding to the PSFCH is located, the processor 1010 is specifically configured to perform one of the following:

Prioritize the PSFCH corresponding to the PSSCH in the current COT;

Optionally, in the case where the target information includes the number of delayed transmissions of the PSFCH, the processor 1010 is specifically configured to perform one of the following:

Prioritize the PSFCH with a large number of delayed transmissions;

Optionally, in the case where the target information includes the feedback type of the PSSCH corresponding to the PSFCH, the processor 1010 is specifically configured to:

Optionally, in the case where the target information includes the CAPC, the processor 1010 is specifically configured to perform one of the following:

Prioritize the PSFCH with high priority corresponding to CAPC;

Embodiments of the present application also provide a readable storage medium. Programs or instructions are stored on the readable storage medium. When the program or instructions are executed by a processor, each process of the above-mentioned PSFCH transmission method embodiment is implemented, and the same can be achieved. The technical effects will not be repeated here to avoid repetition.

Wherein, the processor is the processor in the terminal described in the above embodiment. The readable storage medium includes computer readable storage media, such as computer read-only memory ROM, random access memory RAM, magnetic disk or optical disk, etc.

An embodiment of the present application further provides a chip. The chip includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the above PSFCH sending method embodiment. Each process can achieve the same technical effect. To avoid duplication, it will not be described again here.

It should be understood that the chips mentioned in the embodiments of this application may also be called system-on-chip, system-on-a-chip, system-on-chip or system-on-chip, etc.

Embodiments of the present application further provide a computer program/program product. The computer program/program product is stored in a storage medium. The computer program/program product is executed by at least one processor to implement the above PSFCH transmission method embodiment. Each process can achieve the same technical effect. To avoid repetition, we will not go into details here.

An embodiment of the present application also provides a communication system, including: a first terminal and a second terminal. The terminal can be used to perform the steps of the PSFCH sending method as described above. The second terminal can be used to perform the steps of the PSFCH sending method as described above. Steps of PSFCH transmission method.

It should be noted that, in this document, the terms "comprising", "comprises" or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article or device that includes a series of elements not only includes those elements, It also includes other elements not expressly listed or inherent in the process, method, article or apparatus. Without further limitation, an element defined by the statement "comprises a..." does not exclude the presence of additional identical elements in a process, method, article, or apparatus that includes that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved. Functions may be performed, for example, the methods described may be performed in an order different from that described, and various steps may be added, omitted, or combined. In addition, the special features described with reference to some examples Features can be combined in other examples.

Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus the necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases the former is better. implementation. Based on this understanding, the technical solution of the present application can be embodied in the form of a computer software product that is essentially or contributes to the existing technology. The computer software product is stored in a storage medium (such as ROM/RAM, disk , CD), including several instructions to cause a terminal (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in various embodiments of this application.

The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above-mentioned specific implementations. The above-mentioned specific implementations are only illustrative and not restrictive. Those of ordinary skill in the art will Inspired by this application, many forms can be made without departing from the purpose of this application and the scope protected by the claims, all of which fall within the protection of this application.

Claims

A method for sending physical side link feedback channel PSFCH, including:

The first terminal determines M1 PSFCHs that can be sent simultaneously; the M1 PSFCHs include at least one PSFCH that satisfies the COT sharing condition;

The first terminal sends the M1 PSFCHs.
The PSFCH sending method according to claim 1, wherein when the first terminal determines M1 PSFCHs based on N1 PSFCHs, the M1 PSFCHs are at least one PSFCH determined among the M2 PSFCHs that satisfies the COT sharing condition, Wherein, the M2 PSFCHs are at least one PSFCH determined from the N1 PSFCHs that can be transmitted simultaneously.
The PSFCH sending method according to claim 1, wherein when the first terminal determines M1 PSFCHs based on N2 PSFCHs, the M1 PSFCHs include M3 PFSCHs, or include M3 and M4 PFSCHs, wherein, The M3 PSFCHs are at least one PSFCH determined from the N2 PSFCHs that can be sent simultaneously, and the M4 PSFCHs are at least one determined from the remaining N1-M3 or N1-N2 PSFCHs that need to be sent and can be sent simultaneously. PSFCH; the N2 PSFCHs are PSFCHs that meet the COT sharing conditions contained in the N1 PSFCHs that need to be sent simultaneously.
The PSFCH sending method according to claim 1, wherein when the first terminal determines M1 PSFCHs based on N2 PSFCHs, the M1 PSFCHs include M5 PFSCHs, or include M5 and M6 PFSCHs, wherein, The M5 PSFCHs are at least one PSFCH that can be sent simultaneously, determined from all PSFCHs with the highest priority among the N2 PSFCHs, and the M6 PSFCHs are from the remaining N1-M5 or N1-N2 PSFCHs that need to be sent. At least one determined PSFCH that can be sent simultaneously; the N2 PSFCHs are PSFCHs that meet the COT sharing conditions included in the N1 PSFCHs that need to be sent simultaneously.
The PSFCH sending method according to claim 3, wherein in the case where the M1 PSFCHs include M3 and M4 PFSCHs, the M4 PFSCHs are the first terminal from the remaining PFSCHs when the first condition is met. Determined among N1-M3 or N1-N2 PSFCHs that need to be sent, the first condition includes: N2 PSFCHs are less than the maximum number of PSFCHs that the first terminal can send simultaneously, or M3 PSFCHs are less than the maximum number of PSFCHs that the first terminal can send simultaneously. The maximum number of PSFCHs that a terminal can transmit simultaneously and the total power of M2 PSFCHs is less than the maximum transmission power of the first terminal.
The PSFCH transmission method according to claim 4, wherein,

In the case where the M1 PSFCHs include M5 and M6 PFSCHs, and the M5 PFSCHs satisfy the second condition, the first terminal determines from the remaining N1-M5 or N1-N2 PSFCHs that need to be sent. , the second condition includes: the number of all PSFCHs with the highest priority among the N2 PSFCHs is less than the maximum number of PSFCHs that the first terminal can send at the same time, or M5 PSFCHs are less than the number of PSFCHs that the first terminal can send at the same time. The maximum number of PSFCHs and the total power of M5 PSFCHs is less than The maximum transmit power of the first terminal.
The PSFCH transmission method according to any one of claims 1-6, wherein,

The conditions for meeting COT sharing include at least one of the following:

The second terminal that initiates shared COT is the receiving end of the PSFCH;

The second terminal that initiates the shared COT is in the same groupcast as the first terminal, and the shared COT is used by the second terminal to send multicast information;

The shared COT is used to initiate the second terminal of the shared COT to send broadcast information;

The first terminal receives the first indication information sent by the second terminal that initiates the shared COT, and the first indication information is used to indicate that the first terminal can use the shared COT to send the PSFCH;

The first terminal sends the PSFCH using the COT where the SCI demodulated by the first terminal is located;

The shared COT is used to initiate the second terminal of the shared COT to send feedback information;

The priority corresponding to the channel access priority category CAPC of the PSFCH is greater than the priority corresponding to the CAPC of the shared COT.
The PSFCH transmission method according to claim 7, wherein,

The first indication information is carried by PSCCH or PSSCH; and/or,

The feedback information is carried by PSFCH.
The PSFCH sending method according to any one of claims 1-6, wherein the first terminal determines M1 PSFCHs that can be sent simultaneously, including:

In the case where the first terminal detects the shared COT, the first terminal determines M1 PSFCHs that can be transmitted simultaneously.
The PSFCH sending method according to any one of claims 1-6, wherein the method further includes:

The first terminal determines the shared COT used from the detected at least one shared COT, and the used shared COT includes one of the following:

The shared COT with the highest priority among the at least one shared COT;

The shared COT that can send the largest number of PSFCHs among the at least one shared COT;

Any one or more shared COTs among the at least one shared COT;

Among the at least one shared COT, the shared COT capable of sending the PSFCH with the highest priority.
The PSFCH transmission method according to any one of claims 3-6, wherein,

The priorities of the N2 PSFCHs that meet the COT sharing conditions satisfy at least one of the following:

The priority of the PSFCH with the highest priority among the N2 PSFCHs is the highest priority among the N1 PSFCHs, and the priorities of the remaining PSFCHs among the N2 PSFCHs are the same as the priorities of their respective corresponding PSSCHs;

The priority of at least one of the N2 PSFCHs is the highest priority of the N1 PSFCHs, and the priorities of the remaining PSFCHs among the N2 PSFCHs are the same as the priorities of the corresponding PSSCHs. same;

The priorities of the N2 PSFCHs are all the highest priorities among the N1 PSFCHs.
The PSFCH sending method according to any one of claims 1 to 6, wherein the first terminal sending the M1 PSFCHs includes:

The terminal determines to use the shared COT to simultaneously send the M1 PSFCHs based on at least one of the following:

When there is at least one PSFCH that satisfies the COT sharing condition among the M1 PSFCHs, the first terminal uses the shared COT to send the M1 PSFCHs;

In the case that there is at least one PSFCH that meets the target condition, the first terminal uses the shared COT to send the M1 PSFCHs; the M1 PSFCHs do not include the PSFCH sent to the second terminal that initiates the shared COT;

When the M1 PSFCHs are within the duration range of the shared COT, the first terminal uses the shared COT to send the M1 PSFCHs;

The target conditions include at least one of the following: feedback type is NACK only, feedback value is ACK, and COT sharing conditions are met.
The PSFCH sending method according to claim 12, wherein the method further includes:

In the case where the first terminal does not use the shared COT to send the M1 PSFCHs, the first terminal performs at least one of the following:

Discard M1 PSFCH;

Discard N1 PSFCH;

Execute Type1 LBT. If Type1 LBT is executed successfully, M1 PSFCHs are sent.
The PSFCH sending method according to any one of claims 1-6, wherein the method further includes:

The first terminal determines the PSFCH that can be sent simultaneously according to the target information;

The target information includes at least one of the following:

The channel occupancy time COT of the physical side link shared channel PSSCH corresponding to PSFCH;

The number of delayed transmissions of PSFCH;

The feedback type of PSSCH corresponding to PSFCH;

Channel access priority category CAPC;

PSFCH priority;

Maximum number of PSFCH sent;

The remaining maximum number of PSFCHs to send;

Maximum PSFCH transmit power;

The remaining maximum PSFCH transmit power.
The PSFCH sending method according to claim 14, wherein when the target information includes the COT where the PSSCH corresponding to the PSFCH is located, the first terminal determines based on the target information that it can The PSFCH sent at the same time includes one of the following:

The first terminal preferentially selects the PSFCH corresponding to the PSSCH in the current COT;

The first terminal preferentially selects the PSFCH corresponding to the PSSCH in the first COT; the first COT is the previous COT or the first N COTs of the current COT, and the N is an integer greater than 1.
The PSFCH sending method according to claim 14, wherein when the target information includes the number of delayed transmissions of the PSFCH, the first terminal determines the PSFCH that can be sent simultaneously according to the target information, including one of the following:

The first terminal preferentially selects the PSFCH with a large number of delayed transmissions;

The first terminal preferentially selects the PSFCH whose delayed transmission times are greater than the first threshold.
The PSFCH sending method according to claim 14, wherein when the target information includes the feedback type of the PSSCH corresponding to the PSFCH, the first terminal determines the PSFCH that can be sent simultaneously according to the target information, including:

The first terminal preferentially selects the PSFCH corresponding to the PSSCH whose feedback type is NACK only.
The PSFCH sending method according to claim 14, wherein, when the target information includes the CAPC, the first terminal determines the PSFCH that can be sent simultaneously according to the target information, including one of the following:

The first terminal preferentially selects the PSFCH with a high priority corresponding to the CAPC;

The first terminal preferentially selects the PSFCH whose priority corresponding to the CAPC is greater than the second threshold.
A physical side link feedback channel PSFCH sending device, including:

A processing module used to determine M1 PSFCHs that can be sent simultaneously; the M1 PSFCHs include at least one PSFCH that meets the COT sharing conditions;

A sending module, configured to send the M1 PSFCHs.
A first terminal, including a processor and a memory. The memory stores programs or instructions that can be run on the processor. When the programs or instructions are executed by the processor, any one of claims 1 to 18 is implemented. The steps of the PSFCH sending method described in the item.
A readable storage medium on which programs or instructions are stored. When the programs or instructions are executed by a processor, the PSFCH transmission method according to any one of claims 1 to 18 is implemented.