WO2024067045A1

WO2024067045A1 - Communication method and device

Info

Publication number: WO2024067045A1
Application number: PCT/CN2023/118056
Authority: WO
Inventors: 李翔宇; 彭文杰
Original assignee: 华为技术有限公司
Priority date: 2022-09-29
Filing date: 2023-09-11
Publication date: 2024-04-04
Also published as: CN117834096A

Abstract

The present application provides a communication method and device, which are used for solving the problem that a sending terminal cannot determine whether data carried on a PSSCH is successfully transmitted if one PSSCH corresponds to multiple PSFCHs. The method comprises: a first terminal sends first data to a second terminal through a PSSCH; and if multiple PSFCHs associated with the PSSCH meet a first condition, the first terminal determines that the first data is successfully transmitted, wherein the first condition is related to the number of PSFCHs indicating a positive acknowledgement and/or the number of PSFCHs indicating a negative acknowledgement in the multiple PSFCHs, and/or the first condition is related to a target PSFCH in the multiple PSFCHs. In this way, even if the first terminal obtains different HARQ information through the multiple PSFCHs, the first terminal can reasonably determine whether the current sidelink transmission is successful, thereby improving the communication quality of sidelink transmission.

Description

A communication method and device

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to the Chinese patent application filed with the China Patent Office on September 29, 2022, with application number 202211200234.1 and application name “A Communication Method and Device”, the entire contents of which are incorporated by reference in this application.

Technical Field

The present application relates to the field of communication technology, and in particular to a communication method and device.

Background technique

In sidelink communication, the transmitter sends sidelink data to the receiver through the physical sidelink shared channel (PSSCH), and the receiver needs to feedback the hybrid automatic repeat request (HARQ) information of the sidelink data to the transmitter. The HARQ information in the sidelink communication is carried on the physical sidelink feedback channel (PSFCH).

The transmitter and receiver can perform sidelink communication through the licensed band and the unlicensed band. If the transmitter and receiver perform sidelink communication through the unlicensed band, they will first monitor whether the channel of the unlicensed band is idle before sending the signal. This mechanism of listening before sending is called listen before talk (LBT). Therefore, the receiver may need to perform LBT on the PSFCH before feeding back the HARQ information of the PSSCH on the PSFCH. If LBT succeeds, the receiver feeds back the HARQ information of the PSSCH on the PSFCH. If LBT fails, the receiver cannot feed back the HARQ information of the PSSCH on the PSFCH. Since one PSSCH corresponds to one PSFCH at present, the receiver cannot feed back the HARQ information of the PSSCH when LBT fails.

A possible solution to this problem is to allow one PSSCH to correspond to multiple PSFCHs, that is, to allow the receiving end to feed back the HARQ information of the PSSCH on multiple PSFCHs. However, this will cause a problem, that is, the transmitting end may receive multiple HARQ information of the PSSCH. Considering the possibility of decoding errors in PSFCH decoding, the multiple HARQ information decoded by the transmitting end will be different. In this case, the transmitting end cannot determine whether the data carried in the PSSCH is transmitted successfully.

Summary of the invention

The present application provides a communication method and device for solving the problem that when one PSSCH corresponds to multiple PSFCHs, a transmitting end cannot determine whether the data carried in the PSSCH is transmitted successfully.

In a first aspect, a communication method is provided, the execution subject of the method may be a terminal or a chip, a chip system or a circuit located in the terminal, and the method may be implemented by the following steps: a first terminal sends first data to a second terminal, and the first data is carried on a PSSCH. The first terminal determines whether the first data is successfully transmitted through multiple PSFCHs associated with the PSSCH; wherein, if the multiple PSFCHs meet a first condition, the first data is successfully transmitted; the first condition is related to the number of PSFCHs indicating positive confirmation and/or the number of PSFCHs indicating negative confirmation in the multiple PSFCHs, wherein the positive confirmation is used to indicate that the second terminal successfully receives the first data, and the negative confirmation is used to indicate that the second terminal does not successfully receive the first data; and/or, the first condition is related to the target PSFCH in the multiple PSFCHs.

In the embodiment of the present application, by using the number of PSFCHs indicating positive confirmation and/or the number of PSFCHs indicating negative confirmation, the target PSFCH, etc., the first terminal can reasonably determine whether the current side transmission is successful or failed even if it obtains different HARQ information through multiple PSFCHs, thereby improving the communication quality of the side transmission.

In one possible design, if the first condition is related to the number of PSFCHs indicating positive acknowledgment and/or the number of PSFCHs indicating negative acknowledgment in multiple PSFCHs, the first condition specifically includes one or more of the following:

The number of PSFCHs indicating positive acknowledgement in the plurality of PSFCHs is greater than or equal to the number of PSFCHs indicating negative acknowledgement;

The number of PSFCHs indicating positive acknowledgement among the first M PSFCHs of the plurality of PSFCHs is greater than or equal to the number of PSFCHs indicating negative acknowledgement, where M is an integer greater than 1;

The number of PSFCHs indicating positive acknowledgement in the last N PSFCHs of the plurality of PSFCHs is greater than or equal to the number of PSFCHs indicating negative acknowledgement, where N is an integer greater than 1;

The multiple PSFCHs include K consecutive PSFCH indications that indicate positive confirmation, where K is an integer greater than 0;

The multiple PSFCHs do not include P consecutive PSFCH indication negative acknowledgments, where P is an integer greater than 0;

The PSFCHs included in the first PSFCH group of the multiple PSFCHs all indicate positive confirmation, wherein the PSFCH group includes Q consecutive PSFCHs, and the Q PSFCHs indicate the same information, and Q is an integer greater than 0;

The number of consecutive PSFCHs indicating positive acknowledgement among the multiple PSFCHs is greater than or equal to the number of consecutive PSFCHs indicating negative acknowledgement;

A number of PSFCHs indicating positive acknowledgement in the plurality of PSFCHs is greater than a first value;

The number of PSFCHs indicating negative acknowledgement in the plurality of PSFCHs is less than a second value.

Through the above manner, even if the first terminal obtains different HARQ information through multiple PSFCHs, the first terminal can reasonably determine whether the current sideline transmission is successful or failed, thereby improving the communication quality of the sideline transmission.

In one possible design, if the first condition is related to a target PSFCH among multiple PSFCHs, the first condition may specifically include one or more of the following:

The target PSFCH is a first PSFCH among the multiple PSFCHs, and the first PSFCH indicates a positive confirmation;

The target PSFCH includes H PSFCHs among the multiple PSFCHs, and the H PSFCHs all indicate positive confirmation, or there are two PSFCHs among the H PSFCHs indicating different information, and the second PSFCH among the H PSFCHs indicates negative confirmation.

In one possible design, the first PSFCH is the first PSFCH among multiple PSFCHs, or the first PSFCH is the last PSFCH among multiple PSFCHs.

Through the above method, even if the first terminal obtains different HARQ information through multiple PSFCHs, the first terminal can reasonably determine whether the current side transmission is successful or failed, thereby improving the communication quality of the side transmission. In addition, the above method only needs to determine the HARQ information corresponding to the first or last PSFCH, which is relatively simple and helps to simplify the implementation complexity.

In one possible design, H PSFCHs include the first two HARQ information in multiple PSFCHs, and the second PSFCH is the first PSFCH in the multiple PSFCHs; or, H PSFCHs include the last two PSFCHs in multiple PSFCHs, and the second PSFCH is the last PSFCH in the multiple PSFCHs.

Through the above method, even if the first terminal obtains different HARQ information through multiple PSFCHs, the first terminal can reasonably determine whether the current side transmission is successful or failed, thereby improving the communication quality of the side transmission. In addition, the above method only needs to determine the HARQ information corresponding to the first two or the last two PSFCHs, which is relatively simple and helps to simplify the implementation complexity.

In one possible design, multiple PSFCHs are located before the PUCCH, and the PUCCH is used to report the transmission status of the first data to the network device.

Since the first terminal reports the transmission status of the first data to the network device via the PUCCH, the HARQ information carried by the PSFCH following the PUCCH cannot be reported on the PUCCH. In the above manner, the first terminal does not need to consider the PSFCH following the PUCCH, thereby simplifying the implementation complexity.

In a possible design, multiple PSFCHs are indicated by the second terminal. In the above manner, the understanding of the PSFCH by the first terminal and the second terminal can be aligned, which is conducive to improving the communication quality of the side transmission.

In one possible design, the multiple PSFCHs include a PSFCH located in the shared channel occupied time. In this way, it is possible to avoid the shared channel occupied time being idle and occupied by other terminals, so that the second terminal does not need to re-perform LBT when it needs to send data during the shared channel occupied time.

In one possible design, the multiple PSFCHs also include the first PSFCH in the PSFCH corresponding to the PSSCH.

In one possible design, the number of PSFCHs indicating positive acknowledgments includes: the number of PSFCHs receiving positive acknowledgments; the number of PSFCHs indicating negative acknowledgments includes: the number of PSFCHs receiving negative acknowledgments, and/or the number of PSFCHs not receiving positive acknowledgments and negative acknowledgments. The above design is conducive to improving the communication quality of sideline communications.

In one possible design, the first terminal may determine the first condition based on a channel busy state and/or the reliability of the PSSCH.

According to a second aspect, a communication method is provided, and the execution subject of the method may be a terminal or a chip, a chip system or a circuit located in the terminal, and the method may be implemented by the following steps: a second terminal receives first data from a first terminal, and the first data is carried on a PSSCH; when all PSFCHs before the first PSFCH in the PSFCH corresponding to the PSSCH are not transmitted successfully, the second terminal sends first HARQ information to the first terminal through the first PSFCH, and the first PSFCH is any PSFCH in the PSFCH corresponding to the PSSCH.

In this way, even if one PSSCH corresponds to multiple PSFCHs, the second terminal only sends HARQ information through one PSFCH, so that the first terminal only obtains HARQ information through one PSFCH, avoiding the situation where the first terminal cannot determine whether the data carried by the PSSCH is transmitted successfully because the first terminal obtains HARQ information including both ACK and NACK due to one PSSCH corresponding to multiple PSFCHs.

In one possible design, if the second PSFCH is within the shared channel occupancy time, the second terminal sends a After the first terminal sends the first HARQ information, the second HARQ information is sent to the first terminal through the second PSFCH, where the second PSFCH is any PSFCH located after the first PSFCH in the PSFCH corresponding to the PSSCH.

This method can prevent the shared COT from being preempted by other terminals due to unused COT.

In a third aspect, the present application further provides a communication device, which is a terminal device or a chip in a terminal device. The communication device has the function of implementing any method provided in the first aspect or the second aspect above. The communication device can be implemented by hardware, or can be implemented by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

In one possible design, the communication device includes: a processor, which is configured to support the communication device to perform the corresponding functions of the terminal device in the method shown above. The communication device may also include a memory, which can be coupled to the processor and stores the necessary program instructions and data of the communication device. Optionally, the communication device also includes an interface circuit, which is used to support communication between the communication device and equipment such as a service satellite, such as the transmission and reception of data or signals. Exemplarily, the communication interface can be a transceiver, circuit, bus, module or other type of communication interface.

In one possible design, the communication device includes corresponding functional modules, which are respectively used to implement the steps in the above method. The functions can be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

In one possible design, the structure of the communication device includes a processing unit (or processing unit) and a communication unit (or communication unit), which can perform the corresponding functions in the above method examples. For details, please refer to the description of the method provided in the first aspect or the second aspect, which will not be repeated here.

In a fourth aspect, a communication device is provided, comprising a processor and an interface circuit, wherein the interface circuit is used to receive signals from other communication devices outside the communication device and transmit them to the processor or to send signals from the processor to other communication devices outside the communication device, and the processor is used to implement the methods in the aforementioned first aspect or second aspect and any possible design through logic circuits or execution code instructions.

In a fifth aspect, a computer-readable storage medium is provided, in which a computer program or instruction is stored. When the computer program or instruction is executed by a processor, the method of the first aspect or the second aspect and any possible design is implemented.

In a sixth aspect, a computer program product storing instructions is provided, which, when executed by a processor, implements the method in the aforementioned first aspect or second aspect and any possible design.

In a seventh aspect, a chip system is provided, the chip system including a processor and a memory, for implementing the method in the first aspect or the second aspect and any possible design. The chip system can be composed of a chip, or can include a chip and other discrete devices.

In an eighth aspect, a communication system is provided, the system comprising the device described in the first aspect (such as a first terminal) and other terminals, such as the device described in the second aspect (such as a second terminal).

In a ninth aspect, a communication system is provided, the system comprising the device described in the second aspect (such as the second terminal) and other terminals, such as the device described in the first aspect (such as the first terminal).

The technical effects that can be achieved by the technical solutions of any of the third to eighth aspects mentioned above can be described with reference to the technical effects that can be achieved by the technical solutions of the first aspect mentioned above, and the repeated parts will not be repeated.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the architecture of a communication system according to an embodiment of the present application;

FIG2 is a flow chart of a communication method according to an embodiment of the present application;

FIG3 is a schematic diagram of the structure of a communication device according to an embodiment of the present application;

FIG4 is a schematic diagram of the structure of a communication device according to an embodiment of the present application.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

Below, some terms in the embodiments of the present application are explained to facilitate understanding by those skilled in the art.

1) Licensed and unlicensed bands: Licensed bands are usually only available to certain organizations or operators, while unlicensed bands are shared bands that can be used by different operators/organizations. Licensed bands can be referred to as licensed spectrum, licensed spectrum resources, etc., and unlicensed bands can be referred to as unlicensed spectrum, unlicensed spectrum resources, etc.

In order to use the unlicensed frequency band fairly, the transmitter needs to listen before talk (LBT) before sending data. Generally, LBT is performed at the granularity of a channel (e.g., 20MHz). Before the transmitter sends a signal (e.g., a data signal) on a channel, it can first detect whether the channel is idle, for example, detect whether a nearby communication device is occupying the channel to send a signal. If the channel is not occupied, the transmitter can use the channel to send a signal, and the result can be called the completion of the channel access process, also known as LBT success. If the channel is occupied, the transmitter does not use the channel to send a signal, and the result can be called the incomplete channel access process, also known as LBT failure.

2) Channel occupancy time (COT): After LBT is successful, the sender does not occupy the channel permanently, but determines an occupancy time, which can be called COT. During the COT, the device does not need to perform LBT, or only needs to perform fast LBT (such as Cat 2 LBT).

In addition, the sender can also share the COT with other devices, so that other devices do not need to perform LBT before communicating within the COT. In the scenario where the sender shares the COT with other devices, the COT can be called a shared COT (COT sharing).

3) Sidelink communication: Sidelink communication refers to a communication method in which two peer user nodes directly communicate with each other. For example, sidelink communication can be performed between terminals.

In sidelink communication, the transmitter can send data to the receiver through the sidelink physical shared channel (PSSCH). After receiving the data, the receiver can feedback the HARQ information of the data to the transmitter. Currently, a dedicated HARQ feedback channel, namely the sidelink physical feedback channel (PSFCH), is defined in sidelink communication.

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

Furthermore, unless otherwise specified, the ordinal numbers such as "first" and "second" mentioned in the embodiments of the present application are used to distinguish multiple objects, and are not used to limit the size, content, order, timing, priority or importance of multiple objects. For example, the first terminal and the second terminal are only used to distinguish different terminals, and do not indicate the difference in priority or importance of the two terminals.

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

The terms "including" and "having" and any variations thereof mentioned in the following description of the embodiments of the present application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but may optionally include other steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or devices.

The foregoing text introduces some of the terms involved in the embodiments of the present application. The following text introduces the architecture of the network system to which the method provided by the present application is applied.

The communication method provided in the present application can be applied to a 5G new radio (new radio, NR) unlicensed system, or can also be applied to other communication systems, for example, an Internet of Things (IoT) system, a vehicle-to-everything (V2X) system, a narrowband Internet of Things (NB-IoT) system, a long term evolution (LTE) system, a fifth generation (5G) communication system, an LTE and 5G hybrid architecture, a 5G new radio (new radio, NR) system, and new communication systems that will emerge in the future development of communications.

The terminal involved in the embodiments of the present application is an entity on the user side for receiving or transmitting signals. The terminal can be a device that provides voice and/or data connectivity to the user, for example, a handheld device with wireless connection function, a vehicle-mounted device, etc. The terminal can also be other processing devices connected to a wireless modem. The terminal can communicate with one or more core networks through a radio access network (RAN). The terminal can also be called a wireless terminal, a subscriber unit, a subscriber station, a mobile station, a mobile station, a mobile station, a remote station, an access point, a remote terminal, an access terminal, a user terminal, a user agent, a user device, or a user equipment (UE), etc. The terminal can be a mobile terminal, such as a mobile phone (or a "cellular" phone) and a computer with a mobile terminal, for example, a portable, pocket-sized, handheld, computer-built-in or vehicle-mounted mobile device, which exchanges language and/or data with a wireless access network. For example, the terminal may also be a personal communication service (PCS) phone, a cordless phone, a session initiation protocol (SIP), or a wireless phone. The present invention relates to a mobile phone, a wireless local loop (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), and other devices. Common terminals include, for example, mobile phones, tablet computers, laptop computers, PDAs, mobile internet devices (MIDs), wearable devices such as smart watches, smart bracelets, pedometers, smart home appliances such as smart refrigerators, smart washing machines, etc., but the embodiments of the present application are not limited thereto.

The network device involved in the embodiments of the present application is an entity on the network side for transmitting or receiving signals, which can be used to convert received air frames and Internet protocol (IP) packets to each other, and serve as a router between the terminal and the rest of the access network, wherein the rest of the access network may include an IP network, etc. The network device can also coordinate the attribute management of the air interface. For example, the network device can be an evolutionary Node B (eNB or e-NodeB) in LTE, a new radio controller (NR controller), a gNode B (gNB) in a 5G system, a centralized unit, a new wireless base station, a radio frequency remote module, a micro base station, a relay, a distributed unit, a transmission reception point (TRP) or a transmission point (TP) or any other wireless access device, but the embodiments of the present application are not limited thereto.

Referring to FIG. 1 , a communication system is provided for an embodiment of the present application, and the communication system includes two terminals, namely terminal A and terminal B, and terminal A and terminal B can use unlicensed spectrum for side communication. The communication between terminal A and terminal B can be unicast communication or multicast communication, which is specifically limited here. The terminal in the communication system (such as terminal A or terminal B) can work in a network device resource allocation mode (mode 1) or a user-selected resource mode (mode 2). Among them, mode 1 is mainly used for side communication in the case of network coverage, and the network device can allocate resources for side communication to terminal A and terminal B based on the buffer status report (buffer state report, BSR) reporting status of the terminal. Under mode 2, the sender selects transmission resources from the resource pool configured by the network device or the preset resource pool for communication.

Optionally, the communication system may further include a network device, which may perform uplink/downlink communication with a terminal (e.g., terminal A or terminal B) in the communication system. When a terminal (e.g., terminal A or terminal B) in the communication system operates in mode 1, the network device may further allocate resources for sideline communication to terminal A or terminal B.

FIG. 1 is merely a schematic diagram and does not specifically limit the type of the communication system, or the number and type of devices included in the communication system.

The network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. A person of ordinary skill in the art can appreciate that with the evolution of the network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

The technical features involved in the embodiments of the present application are introduced below.

At present, one PSSCH corresponds to one PSFCH, and the transmitter may determine whether the data carried by the PSSCH is successfully transmitted based on the HARQ information carried on the PSFCH. In the scenario of communication in an unlicensed frequency band, the receiver may need to perform LBT before feeding back the HARQ information through the PSFCH. If LBT fails, the receiver cannot feed back the HARQ information of the PSSCH. In response to this problem, a possible solution is to allow one PSSCH to correspond to multiple PSFCHs, that is, to allow the receiver to feed back the HARQ information of the PSSCH on multiple PSFCHs. However, there will be a problem, that is, the transmitter may receive multiple HARQ information of the PSSCH. Considering the possibility of decoding errors in PSFCH decoding, the multiple HARQ information decoded by the transmitter will be different. For example, the HARQ information fed back by the receiving end through the PSFCH is a positive acknowledgment (ACK), but the transmitting end decodes part of the HARQ information on the PSFCH incorrectly, and the decoded result is a negative acknowledgment (NACK). This causes the HARQ information obtained by the transmitting end to contain both ACK and NACK. In this case, the transmitting end cannot determine whether the data carried in the PSSCH is transmitted successfully.

Based on this, the embodiment of the present application provides a communication method and device for solving the problem that when one PSSCH corresponds to multiple PSFCHs, the transmitter cannot determine whether the data carried in the PSSCH is successfully transmitted. The method and the device are based on the same concept. Since the principles of solving the problem by the method and the device are similar, the implementation of the device and the method can refer to each other, and the repeated parts will not be repeated.

For a terminal, it may receive data (such as PSSCH) sent by one or more other terminals. In the following, the terminal that receives PSSCH is called the receiving end, and the terminal that sends PSSCH is called the sending end. That is, for a receiving end, it may receive PSSCH sent by one or more other sending ends. It should be understood that the sending end and the receiving end are relative. The sending end can also have a receiving function, and the receiving end can also have a sending function.

In the embodiment of the present application, the first terminal may refer to a transmitting end, and the second terminal may refer to a receiving end.

The communication method provided in the embodiment of the present application is described in detail below with reference to the accompanying drawings.

See Figure 2, which is a flow chart of a communication method provided by the present application:

S201: A first terminal sends first data to a second terminal. Correspondingly, the second terminal receives the first data from the first terminal.

The first data is carried on the PSSCH.

S202: The second terminal feeds back HARQ information to the first terminal via the PSFCH associated with the PSSCH. Correspondingly, the first terminal receives the HARQ information via the PSFCH associated with the PSSCH.

The HARQ information is used to indicate whether the second terminal has successfully received the first data. If the second terminal has successfully received the first data, the second terminal feeds back an ACK to the first terminal via the PSFCH associated with the PSSCH. If the second terminal has not successfully received the first data, the second terminal feeds back a NACK to the first terminal via multiple PSFCHs associated with the PSSCH.

In the embodiment of the present application, one PSSCH can be associated with (or correspond to) multiple PSFCHs, and the second terminal can send one HARQ information through one PSFCH.

In a possible implementation, if the second terminal successfully performs LBT before transmitting a certain PSFCH (assuming it is PSFCH 1) among the multiple PSFCHs corresponding to the above PSSCH (or sends HARQ information on PSFCH 1), the second terminal may not send HARQ information on the PSFCH located after the PSFCH 1 among the multiple PSFCHs corresponding to the above PSSCH. That is, for the first PSFCH corresponding to the PSSCH, if the PSFCHs located before the first PSFCH among the multiple PSFCHs corresponding to the PSSCH are not transmitted successfully or all fail to perform LBT, the second terminal sends HARQ information to the first terminal through the first PSFCH.

Among them, "HARQ information is sent on PSFCH 1" can be understood as that LBT is successfully performed before PSFCH 1, and HARQ information is transmitted on PSFCH 1 through the physical layer (physical layer, PHY) of the second terminal.

For example, if the second terminal successfully performs LBT before the transmission of the first PSFCH among the multiple PSFCHs corresponding to the above-mentioned PSSCH (or sends HARQ information on the first PSFCH among the multiple PSFCHs corresponding to the above-mentioned PSSCH), it may not send HARQ information on the second PSFCH and subsequent PSFCHs among the multiple PSFCHs corresponding to the above-mentioned PSSCH.

It can be understood that if LBT fails before the first PSFCH among the multiple PSFCHs corresponding to the above PSSCH (or HARQ information is not sent on the first PSFCH among the multiple PSFCHs corresponding to the above PSSCH), the second terminal can send HARQ information through the second PSFCH among the multiple PSFCHs corresponding to the above PSSCH. If LBT succeeds before the second PSFCH (or HARQ information is sent on the second PSFCH), HARQ information may not be sent on the third PSFCH and subsequent PSFCHs among the multiple PSFCHs corresponding to the above PSSCH. And so on.

Optionally, if one or more PSFCHs among the multiple PSFCHs corresponding to the PSSCH are located in the shared COT, the second terminal may also send HARQ information through the one or more PSFCHs. In this way, the shared COT can be prevented from being occupied by other terminals due to being unused.

The shared COT may be shared by the first terminal to the second terminal, or may be shared by other devices (such as a third terminal) to the second terminal, which is not specifically limited here.

In one embodiment, the second terminal may indicate the information of the at least one PSFCH to the first terminal. For example, the PSFCH where the HARQ information is located may be indicated to the first terminal, that is, on which PSFCHs the HARQ information will be transmitted. By indicating the PSFCH where the HARQ information is located, the number and position of the PSFCH may be indicated. Alternatively, the number of transmissions of the HARQ information may be indicated to the first terminal, and the number of PSFCHs may be indicated by the number of transmissions of the HARQ information.

Three methods for determining the multiple PSFCHs corresponding to the PSSCH are described below. The first terminal or the second terminal may determine the multiple PSFCHs corresponding to the PSSCH in one or more of the following methods.

Method 1: There is a mapping relationship between the PSSCH and the corresponding PSFCH, so that the first terminal or the second terminal can determine the multiple PSFCHs corresponding to the above PSSCH according to the mapping relationship.

For example, there is a mapping relationship between PSSCH and the corresponding PSFCH in the time domain. As an example, assume that one PSSCH corresponds to 5 PSFCHs, and there are at least 2k time slots between the PSSCH and the corresponding PSFCH, where k = 1, 2, 3, 4, 5. Therefore, the first PSFCH corresponding to the PSSCH is the PSFCH closest to the PSSCH after 2 time slots, the second PSFCH corresponding to the PSSCH is the PSFCH closest to the PSSCH after 4 time slots, and so on. The fifth PSFCH corresponding to the PSSCH is the PSFCH closest to the PSSCH after 10 time slots.

Another example is to assume that one PSSCH corresponds to 5 PSFCHs, and there are at least 3k time slots between the PSSCH and the corresponding PSFCH, where k = 1, 2, 3, 4, 5. Therefore, the first PSFCH corresponding to the PSSCH is the side channel resource after the PSSCH and is separated from the PSSCH by 3 time slots, and the second PSFCH corresponding to the PSSCH is the side channel resource after the PSSCH and is separated from the PSSCH by 6 time slots. The side channel resource of the PSSCH, and so on, the fifth PSFCH corresponding to the PSSCH is the side channel resource after the PSSCH and separated from the PSSCH by 15 time slots.

Optionally, the mapping relationship between the PSSCH and the corresponding multiple PSFCHs may be defined by a protocol, configured by a network device, configured by the first terminal or the second terminal, or configured by other terminals.

The value of k may be defined by a protocol, configured by a network device, configured by the first terminal or the second terminal, or configured by other terminals.

In a second method, the first terminal may indicate to the second terminal the multiple PSFCHs corresponding to the PSSCH. The first terminal may determine the multiple PSFCHs corresponding to the PSSCH by the above method 1, or the first terminal may determine the multiple PSFCHs by other methods, which are not specifically limited here.

In a third manner, the second terminal may indicate to the first terminal the multiple PSFCHs corresponding to the PSSCH. The second terminal may determine the multiple PSFCHs corresponding to the PSSCH by the first manner above, or the second terminal may determine the multiple PSFCHs by other manners, which are not specifically limited here.

Through the above three methods, the first terminal and the second terminal can align their understanding of multiple PSFCHs corresponding to the PSSCH, thereby improving the accuracy of HARQ information feedback.

S203: The first terminal determines whether the first data is successfully transmitted according to at least one PSFCH among the multiple PSFCHs associated with the above-mentioned PSSCH.

The at least one PSFCH may be all or part of the multiple PSFCHs associated with the PSSCH.

In the first exemplary description, the at least one PSFCH may be a PSFCH associated with a PSSCH.

For example, according to the description above, if the second terminal successfully performs LBT before a certain PSFCH (assuming it is PSFCH 1) among the multiple PSFCHs corresponding to the above PSSCH is transmitted (or HARQ information is sent on PSFCH 1), the second terminal may not send HARQ information on the PSFCH located after the PSFCH 1 among the multiple PSFCHs corresponding to the above PSSCH. Based on this, the at least one PSFCH may be the above PSFCH 1.

Based on the first exemplary description, the first terminal may determine whether the first data is successfully transmitted according to the HARQ information carried by the PSFCH 1. Specifically, if the PSFCH 1 carries ACK, it may be determined that the first data is successfully transmitted. If the PSFCH 1 carries NACK, it may be determined that the first data is not successfully transmitted.

In a second exemplary description, the at least one PSFCH may include a PSFCH located before a physical uplink control channel (PUCCH) among a plurality of PSFCHs associated with the PSSCH, and the PUCCH is used to report the transmission status of the first data to the network device. That is, the at least one PSFCH is located before the PUCCH.

For example, assuming that the PSSCH is located in time slot 1, the five PSFCHs associated with the PSSCH are located in time slot 3, time slot 5, time slot 7, time slot 9 and time slot 11 respectively, and the PUCCH is located in time slot 8, then the at least one PSFCH mentioned above may include the PSFCHs located in time slot 3, time slot 5 and time slot 7.

In the third exemplary description, the at least one PSFCH may include a PSFCH indicated by the second terminal among multiple PSFCHs corresponding to the PSSCH.

For example, according to the foregoing description, the second terminal may indicate to the first terminal the PSFCH where the HARQ information corresponding to the first data is located. Based on this, the at least one PSFCH may include the PSFCH where the HARQ information corresponding to the first data is located indicated by the second terminal.

In the fourth exemplary embodiment, the at least one PSFCH may include a PSFCH located in a shared COT among multiple PSFCHs corresponding to the PSSCH.

For example, according to the previous description, if one or more PSFCHs among the multiple PSFCHs corresponding to the PSSCH are located in the shared COT, the second terminal may also send HARQ information through the one or more PSFCHs. Based on this, the at least one PSFCH may include the PSFCH located in the shared COT among the multiple PSFCHs corresponding to the PSSCH.

Optionally, if LBT of one of the multiple PSFCHs corresponding to the PSSCH is successful before the shared COT (or HARQ information is sent on the PSFCH), the at least one PSFCH may also include the PSFCH. For example, assuming that the second terminal device successfully performs LBT before the first PSFCH among the multiple PSFCHs corresponding to the PSSCH (or HARQ information is sent on the first PSFCH), the at least one PSFCH may also include the first PSFCH. The first PSFCH is not included in the shared COT.

In combination with any one of the second to fourth exemplary descriptions of the at least one PSFCH, an implementation method for the first terminal to determine whether the first data is successfully transmitted based on at least one PSFCH associated with the above-mentioned PSSCH is described below.

In the present application, if the at least one PSFCH satisfies the first condition, the first terminal determines that the first data transmission is successful. The first condition is related to the number of PSFCHs indicating ACK and/or the number of PSFCHs indicating NACK in the at least one PSFCH. And/or, the first condition is related to the target PSFCH in the at least one PSFCH.

Exemplarily, the number of PSFCHs indicating ACK includes: the number of PSFCHs receiving ACK, or described as, the number of PSFCHs receiving HARQ information as ACK.

The number of PSFCHs indicating NACK includes: the number of PSFCHs receiving NACK (or described as the number of PSFCHs receiving HARQ information as NACK), and/or the number of PSFCHs not receiving positive or negative acknowledgment (or described as the number of PSFCHs not receiving HARQ information).

If the first condition is related to the number of PSFCHs indicating positive acknowledgment and/or the number of PSFCHs indicating negative acknowledgment in the at least one PSFCH, the first condition may specifically include one or more of the following conditions:

Condition 1.1: The number of PSFCHs indicating ACK in the at least one PSFCH is greater than or equal to the number of PSFCHs indicating NACK.

One implementation based on condition 1.1 is that when the number of PSFCHs indicating ACK in the at least one PSFCH is greater than or equal to the number of PSFCHs indicating NACK, it is determined that the first data is successfully transmitted. Otherwise, it is determined that the first data is not successfully transmitted.

Condition 1.2: The number of PSFCHs indicating ACK in the first M PSFCHs of the at least one PSFCH is greater than or equal to the number of PSFCHs indicating NACK, and M is an integer greater than 1, for example, M is equal to 2, 3, 4, ..., 10, ..., 15, ..., 20, ..., etc. The value of M may be predefined by the protocol, configured by the network device, configured by other terminals, or determined by the first terminal or the second terminal.

It can be understood that the value of M is not greater than the number of the at least one PSFCH mentioned above.

One implementation based on condition 1.2 is that when the number of PSFCHs indicating ACK in the first M PSFCHs of the at least one PSFCH is greater than or equal to the number of PSFCHs indicating NACK, it is determined that the first data is successfully transmitted. Otherwise, it is determined that the first data is not successfully transmitted.

Condition 1.3: The number of PSFCHs indicating ACK in the last N PSFCHs of the at least one PSFCH is greater than or equal to the number of PSFCHs indicating NACK, and N is an integer greater than 1, for example, N is equal to 2, 3, 4, ..., 8, ..., 12, ..., 21, ..., etc. The value of N may be predefined by the protocol, configured by the network device, configured by other terminals, or determined by the first terminal or the second terminal.

It can be understood that the value of N is not greater than the number of the at least one PSFCH mentioned above.

One implementation based on condition 1.3 is that when the number of PSFCHs indicating ACK in the last N PSFCHs of the at least one PSFCH is greater than or equal to the number of PSFCHs indicating NACK, it is determined that the first data is successfully transmitted. Otherwise, it is determined that the first data is not successfully transmitted.

Condition 1.4: The at least one PSFCH includes K consecutive PSFCHs indicating ACK, where K is an integer greater than 0, for example, K is equal to 1, 2, 3, 4, ..., 9, ..., 14, ..., 35, ..., etc. The value of K may be predefined by the protocol, configured by the network device, configured by other terminals, or determined by the first terminal or the second terminal.

It can be understood that the value of K is not greater than the number of the at least one PSFCH mentioned above.

One implementation based on condition 1.4 is that when the at least one PSFCH includes K consecutive PSFCHs indicating ACK, it is determined that the first data is successfully transmitted. Otherwise, it is determined that the first data is not successfully transmitted.

Condition 1.5: The at least one PSFCH does not include P consecutive PSFCH indications NACK, where P is an integer greater than 0, for example, P is equal to 1, 2, 3, 4, ..., 7, ..., 18, ..., 33, ..., etc. The value of P may be predefined by the protocol, configured by the network device, configured by other terminals, or determined by the first terminal or the second terminal.

It can be understood that the value of P is not greater than the number of the at least one PSFCH mentioned above.

One implementation manner based on condition 1.5 is that when the at least one PSFCH does not include P consecutive PSFCH indications NACK, it is determined that the first data is successfully transmitted. Otherwise, it is determined that the first data is not successfully transmitted.

Alternatively, it can also be described as: when the at least one PSFCH includes P consecutive PSFCHs indicating NACK, it is determined that the first data is not successfully transmitted. Otherwise, it is determined that the first data is not successfully transmitted.

Condition 1.6, the PSFCHs in the first PSFCH group of the at least one PSFCH mentioned above all indicate ACK, and the PSFCH group includes Q consecutive PSFCHs indicating the same information, and the Q PSFCHs indicate the same information, Q is an integer greater than 0, for example, Q is equal to 1, 2, 3, 4, ..., 6, ..., 16, ..., 27, ... and so on.

The value of Q may be predefined by the protocol, configured by a network device, configured by other terminals, or determined by the first terminal or the second terminal.

It can be understood that the value of Q is not greater than the number of the at least one PSFCH mentioned above.

One implementation based on condition 1.6 is that when all PSFCHs included in the first PSFCH group in the at least one PSFCH indicate ACK, it is determined that the first data is successfully transmitted, wherein the PSFCH group includes Q consecutive PSFCHs, and the Q PSFCHs indicate the same information. If all PSFCHs included in the first PSFCH group in the at least one PSFCH indicate NACK, it is determined that the first data is not successfully transmitted.

Optionally, when the PSFCH group is not included in the at least one PSFCH, the transmission result of the first data may be predefined by the protocol, configured by the network device, configured by other terminals, or determined by the first terminal or the second terminal.

Alternatively, when the at least one PSFCH does not include the PSFCH group, the transmission result of the first data may also be determined by the first terminal in combination with other conditions.

For example, if the at least one PSFCH does not include the PSFCH group, the first terminal may combine the condition 1.1 to make a judgment.

Condition 1.7: The number of consecutive PSFCHs indicating ACK in the at least one PSFCH is greater than or equal to the number of consecutive PSFCHs indicating NACK.

For example, the maximum number of consecutive occurrences of ACK is greater than the maximum number of consecutive occurrences of NACK.

One implementation of condition 1.7 is that when the number of consecutive PSFCHs indicating ACK in the at least one PSFCH is greater than or equal to the number of consecutive PSFCHs indicating NACK, it is determined that the first data is successfully transmitted. Otherwise, it is determined that the first data is not successfully transmitted.

Condition 1.8: The number of PSFCHs indicating ACK in the at least one PSFCH is greater than a first value.

For example, the first value is 1, that is, the at least one PSFCH includes at least one PSFCH indicating ACK.

One implementation based on the above example is that when the at least one PSFCH includes at least one PSFCH indicating ACK, it is determined that the first data is successfully transmitted. Otherwise, it is determined that the first data is not successfully transmitted.

Condition 1.9: The number of PSFCHs indicating NACK in the at least one PSFCH is less than the second value.

For example, the first value is 1, that is, the at least one PSFCH does not include a PSFCH indicating NNACK.

One implementation method based on the above example is that when the at least one PSFCH does not include a PSFCH indicating NACK, it is determined that the first data is successfully transmitted. Otherwise, it is determined that the first data is not successfully transmitted. Alternatively, it can also be described as that when the at least one PSFCH includes at least one PSFCH indicating NACK, it is determined that the first data is not successfully transmitted. Otherwise, it is determined that the first data is successfully transmitted.

If the first condition is related to the target PSFCH in the at least one PSFCH, the first condition may specifically include one or more of the following conditions:

Condition 2.1: The target PSFCH is the first PSFCH among the at least one PSFCH, and the first PSFCH indicates ACK.

For example, the first PSFCH may be the first PSFCH in the at least one PSFCH. Condition 2.1 may be described as: the first PSFCH in the at least one PSFCH is ACK.

One implementation method based on the above example is that when the first PSFCH in the at least one PSFCH is ACK, it is determined that the first data is successfully transmitted. Otherwise, it is determined that the first data is not successfully transmitted.

Alternatively, the first PSFCH may be the last PSFCH in the at least one PSFCH. Condition 2.1 may be described as: the last PSFCH in the at least one PSFCH is ACK.

One implementation method based on the above example is that when the last PSFCH in the at least one PSFCH is ACK, it is determined that the first data is successfully transmitted. Otherwise, it is determined that the first data is not successfully transmitted.

It can be understood that the above-mentioned first PSFCH can also be other PSFCHs in the above-mentioned at least one PSFCH, such as the second PSFCH, the third PSFCH, and so on.

Optionally, the first PSFCH may be predetermined by a protocol, or may be configured by a network device, or may be configured by another terminal (such as a third terminal), or may be configured by the first terminal or the second terminal.

Condition 2.2: The target PSFCH includes H PSFCHs among the at least one PSFCH, and all of the H PSFCHs indicate ACK, or, there are two PSFCHs among the H PSFCHs indicating different information, and the second PSFCH among the H PSFCHs indicates NACK.

For example, the H PSFCHs include the first two PSFCHs in the at least one PSFCH, and the second PSFCH is the first PSFCH in the at least one PSFCH.

The above condition 2.2 can be described as: the HARQ information indicated by the first two PSFCHs in the above at least one PSFCH is the same and both indicate ACK, or the HARQ information indicated by the first two PSFCHs in the above at least one PSFCH is different and the first one is NACK.

One implementation method based on the above example is that when the HARQ information indicated by the first two PSFCHs in the above at least one PSFCH is the same, the HARQ information indicated by the first PSFCH shall prevail, that is, if the first PSFCH indicates ACK, it is determined that the first data is successfully transmitted, and if the first PSFCH indicates NACK, it is determined that the first data is not successfully transmitted. When the HARQ information indicated by the first two PSFCHs in the above at least one PSFCH is different, the opposite information of the HARQ information indicated by the first PSFCH shall prevail, that is, if the first PSFCH indicates ACK, it is determined that the first data is not successfully transmitted, and if the first PSFCH indicates NACK, it is determined that the first data is successfully transmitted.

Alternatively, the H PSFCHs include the last two PSFCHs in the at least one PSFCH, and the second PSFCH is the last PSFCH in the at least one PSFCH.

The above condition 2.2 can be described as: the HARQ information indicated by the last two PSFCHs in the above at least one PSFCH is the same and both indicate ACK, or the HARQ information indicated by the last two PSFCHs in the above at least one PSFCH is different and the last one is NACK.

One implementation method based on the above example is that when the HARQ information indicated by the last two PSFCHs in the above at least one PSFCH is the same, the HARQ information indicated by the last PSFCH shall prevail, that is, if the last PSFCH indicates ACK, it is determined that the first data is successfully transmitted, and if the last PSFCH indicates NACK, it is determined that the first data is not successfully transmitted. When the HARQ information indicated by the last two PSFCHs in the above at least one PSFCH is different, the opposite information of the HARQ information indicated by the last PSFCH shall prevail, that is, if the last PSFCH indicates ACK, it is determined that the first data is not successfully transmitted, and if the last PSFCH indicates NACK, it is determined that the first data is successfully transmitted.

The above-mentioned first condition may be configured by a network device or other terminal. Taking a network device as an example, in one possible implementation, the network device may determine the first condition based on a channel busy ratio (CBR) and/or the reliability of a PSSCH carrying the first data. For example, taking CBR as an example, there is a corresponding relationship between CBR and the conditions satisfied by PSFCH, and the network device may determine the first condition based on the corresponding relationship. Among them, the corresponding relationship between CBR and the conditions satisfied by PSFCH may be defined by a protocol, or may be determined by the network device in other ways, which is not specifically limited here.

Alternatively, the first condition may also be determined by the first terminal. For example, the first terminal may determine the first condition based on the CBR and/or the reliability of the PSSCH carrying the first data. For example, taking CBR as an example, there is a corresponding relationship between the CBR and the conditions satisfied by the PSFCH, and the first terminal may determine the first condition based on the corresponding relationship. Among them, the corresponding relationship between the CBR and the conditions satisfied by the PSFCH may be defined by the protocol, configured by the network device, or determined by the first terminal in other ways, which is not specifically limited here.

It should be noted that the present application only takes the determination of the successful transmission of the first data as an example to illustrate the conditions satisfied by the multiple PSFCHs corresponding to the PSSCH. In the specific implementation, it can also be determined that the first data is not successfully transmitted. It can be understood that if the multiple PSFCHs corresponding to the PSSCH meet the opposite condition of the above-mentioned first condition, it is determined that the first data is not successfully transmitted. For example, taking the above-mentioned condition 1.1 as an example, when the multiple PSFCHs corresponding to the PSSCH meet the condition 1.1, it is determined that the data transmission is successful, that is, when the number of PSFCHs indicating ACK in the above-mentioned at least one PSFCH is greater than or equal to the number of PSFCHs indicating NACK, it is determined that the first data transmission is successful. When the multiple PSFCHs corresponding to the PSSCH meet the opposite condition of condition 1.1, it is determined that the data transmission is not successful, that is, when the number of PSFCHs indicating ACK in the above-mentioned at least one PSFCH is less than the number of PSFCHs indicating NACK, it is determined that the first data is not successfully transmitted.

Optionally, the above S203 can be specifically executed by the media access control (MAC) layer or PHY layer of the first terminal.

For example, when S203 is executed by the MAC layer of the first terminal, the MAC layer of the first terminal may determine whether the first data is successfully transmitted according to the HARQ information of the plurality of PSFCHs indicated by the PHY layer of the first terminal.

For another example, when S203 is executed by the PHY layer of the first terminal, the PHY layer of the first terminal determines whether the first data is successfully transmitted according to the HARQ information of the multiple PSFHCs, and indicates the determination result to the MAC layer of the first terminal. In this example, for data carried by one PSSCH, the PHY layer of the first terminal only delivers one HARQ information to the MAC layer of the first terminal.

In the embodiment of the present application, by determining the final HARQ feedback result according to multiple PSFCHs associated with the PSSCH, it is possible to reasonably determine whether the current side transmission is successful or failed, thereby improving the communication quality of the side transmission.

Based on the same inventive concept as the method embodiment, an embodiment of the present application provides a communication device, the structure of which may be as shown in FIG. 3 , including a communication unit 301 and a processing unit 302 .

In one implementation, the communication device can be specifically used to implement the method executed by the first terminal in the embodiment of FIG. 2 . The device can be the first terminal itself, or a chip or a chipset in the first terminal or a part of the chip used to execute the function of the related method. The communication unit 301 is used to send the first data to the second terminal, and the first data is carried on the PSSCH; the processing unit 302 is used to Multiple PSFCHs associated with the PSSCH determine whether the first data is transmitted successfully; wherein, if the multiple PSFCHs meet the first condition, the first data is transmitted successfully; the first condition is related to the number of PSFCHs indicating positive confirmation and/or the number of PSFCHs indicating negative confirmation in the multiple PSFCHs, wherein the positive confirmation is used to indicate that the second terminal successfully receives the first data, and the negative confirmation is used to indicate that the second terminal does not successfully receive the first data; and/or the first condition is related to the target PSFCH in the multiple PSFCHs.

Exemplarily, the first condition is related to the number of PSFCHs indicating positive acknowledgment and/or the number of PSFCHs indicating negative acknowledgment in multiple PSFCHs, including:

The first condition includes one or more of the following:

The PSFCHs included in the first PSFCH group in the multiple PSFCHs all indicate positive confirmation, the PSFCHs include Q consecutive PSFCHs, and the Q PSFCHs indicate the same information, where Q is an integer greater than 0;

Exemplarily, the first condition is related to a target PSFCH among multiple PSFCHs, including:

The first condition includes one or more of the following:

Exemplarily, the first PSFCH is the first PSFCH among multiple PSFCHs, or the first PSFCH is the last PSFCH among multiple PSFCHs.

Exemplarily, the H PSFCHs include first two HARQ information in the multiple PSFCHs, and the second PSFCH is the first PSFCH in the multiple PSFCHs;

Alternatively, the H PSFCHs include the last two PSFCHs in the multiple PSFCHs, and the second PSFCH is the last PSFCH in the multiple PSFCHs.

Exemplarily, a plurality of PSFCHs are located before a physical uplink control channel PUCCH, and the PUCCH is used to report the transmission status of the first data to the network device.

Exemplarily, multiple PSFCHs are indicated for the second terminal.

Exemplarily, the multiple PSFCHs include a PSFCH located within the shared channel occupancy time.

Exemplarily, the multiple PSFCHs also include the first PSFCH in the PSFCH corresponding to the PSSCH.

Exemplarily, indicating the number of PSFCHs with positive acknowledgment includes: the number of PSFCHs for which positive acknowledgment is received;

The number of PSFCHs indicating negative acknowledgement includes: the number of PSFCHs for which negative acknowledgement is received, and/or the number of PSFCHs for which positive acknowledgement and negative acknowledgement are not received.

In one embodiment, the communication device can be specifically used to implement the method executed by the second terminal in the embodiment of Figure 2. The device can be the second terminal itself, or a chip or chipset in the second terminal or a part of the chip used to execute the function of the related method. Among them, the communication unit 301 is used to communicate with the first terminal; the processing unit 302 is used to receive the first data from the first terminal through the communication unit 301, and the first data is carried on the PSSCH; and when the PSFCHs located before the first PSFCH in the PSFCH corresponding to the PSSCH are not successfully transmitted, the first HARQ information is sent to the first terminal through the first PSFCH through the communication unit 301, and the first PSFCH is any PSFCH in the PSFCH corresponding to the PSSCH.

Exemplarily, if the second PSFCH is located within the shared channel occupancy time, after sending the first HARQ information to the first terminal through the first PSFCH, the second HARQ information is sent to the first terminal through the second PSFCH through the communication unit 301, and the second PSFCH is any PSFCH in the PSFCH corresponding to the PSSCH that is located after the first PSFCH.

The division of modules in the embodiments of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation. In addition, each functional module in each embodiment of the present application may be integrated into a processor, or may exist physically separately, or two or more modules may be integrated into one module. The above-mentioned integrated modules may be implemented in the form of hardware or in the form of software functional modules. It is understood that the functions or implementations of each module in the embodiments of the present application may further refer to the relevant description of the method embodiment.

In a possible manner, the communication device may be as shown in FIG4 , and the device may be a communication device or a chip in a communication device, wherein the communication device may be a terminal device in the above embodiment or a network device in the above embodiment. The device includes a processor 401 and a communication interface 402, and may also include a memory 403. Among them, the processing unit 302 may be the processor 401. The communication unit 301 may be the communication interface 402. Optionally, the processor 401 and the memory 403 may also be integrated together.

The processor 401 may be a CPU, or a digital processing unit, etc. The communication interface 402 may be a transceiver, or an interface circuit such as a transceiver circuit, or a transceiver chip, etc. The device further includes: a memory 403 for storing programs executed by the processor 401. The memory 403 may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), etc., or a volatile memory (volatile memory), such as a random-access memory (RAM). The memory 403 is any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.

The processor 401 is used to execute the program code stored in the memory 403, specifically to execute the actions of the processing unit 302, which will not be described in detail in this application. The communication interface 402 is specifically used to execute the actions of the communication unit 301, which will not be described in detail in this application.

The specific connection medium between the communication interface 402, the processor 401 and the memory 403 is not limited in the embodiment of the present application. In FIG. 4 , the memory 403, the processor 401 and the communication interface 402 are connected by a bus 404. The bus is represented by a bold line in FIG. 4 . The connection mode between other components is only for schematic illustration and is not limited thereto. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, only one bold line is used in FIG. 4 , but it does not mean that there is only one bus or one type of bus.

An embodiment of the present invention further provides a computer-readable storage medium for storing computer software instructions required to be executed by the above-mentioned processor, which includes a program required to be executed by the above-mentioned processor.

The embodiment of the present application also provides a communication system, including a communication device for implementing the first terminal function in the embodiment of FIG. 2 and a communication device for implementing the second terminal function in the embodiment of FIG. 2 .

Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

The present application is described with reference to the flowchart and/or block diagram of the method, device (system), and computer program product according to the present application. It should be understood that each process and/or box in the flowchart and/or block diagram, as well as the combination of the process and/or box in the flowchart and/or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce a device for implementing the functions specified in one process or multiple processes in the flowchart and/or one box or multiple boxes in the block diagram.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including an instruction device that implements the functions specified in one or more processes in the flowchart and/or one or more boxes in the block diagram.

These computer program instructions may also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, whereby the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more processes in the flowchart and/or one or more boxes in the block diagram.

Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

A communication method, characterized in that the method comprises:

The first terminal sends first data to the second terminal, where the first data is carried on a sidelink physical shared channel PSSCH;

The first terminal determines whether the first data is successfully transmitted through multiple sidelink physical feedback channels PSFCH associated with the PSSCH;

Wherein, if the multiple PSFCHs meet the first condition, the first data transmission is successful;

The first condition is related to the number of PSFCHs indicating positive acknowledgment and/or the number of PSFCHs indicating negative acknowledgment among the multiple PSFCHs, wherein the positive acknowledgment is used to indicate that the second terminal successfully receives the first data, and the negative acknowledgment is used to indicate that the second terminal does not successfully receive the first data;

And/or, the first condition is related to a target PSFCH among the multiple PSFCHs.
The method according to claim 1, characterized in that the first condition is related to the number of PSFCHs indicating positive acknowledgment and/or the number of PSFCHs indicating negative acknowledgment in the multiple PSFCHs, including:

The first condition includes one or more of the following:

The number of PSFCHs indicating positive acknowledgement in the plurality of PSFCHs is greater than or equal to the number of PSFCHs indicating negative acknowledgement;

The number of PSFCHs indicating positive acknowledgement among the first M PSFCHs of the plurality of PSFCHs is greater than or equal to the number of PSFCHs indicating negative acknowledgement, and M is an integer greater than 1;

The number of PSFCHs indicating positive acknowledgement in the last N PSFCHs of the multiple PSFCHs is greater than or equal to the number of PSFCHs indicating negative acknowledgement, where N is an integer greater than 1;

The multiple PSFCHs include K consecutive PSFCHs indicating positive confirmation, where K is an integer greater than 0;

The multiple PSFCHs do not include P consecutive PSFCH indication negative acknowledgments, where P is an integer greater than 0;

The PSFCHs included in the first PSFCH group of the multiple PSFCHs all indicate positive confirmation, wherein the PSFCH group includes Q consecutive PSFCHs, and the Q PSFCHs indicate the same information, and Q is an integer greater than 0;

The number of consecutive PSFCHs indicating positive acknowledgement among the multiple PSFCHs is greater than or equal to the number of consecutive PSFCHs indicating negative acknowledgement;

The number of PSFCHs indicating positive acknowledgement in the plurality of PSFCHs is greater than a first value;

The number of PSFCHs indicating negative acknowledgement in the plurality of PSFCHs is less than a second value.
The method according to claim 1 or 2, characterized in that the first condition is related to the target PSFCH among the multiple PSFCHs, including:

The first condition includes one or more of the following:

The target PSFCH is a first PSFCH among the multiple PSFCHs, and the first PSFCH indicates a positive confirmation;

The target PSFCH includes H PSFCHs among the multiple PSFCHs, and the H PSFCHs all indicate positive confirmation, or there are two PSFCHs among the H PSFCHs indicating different information, and the second PSFCH among the H PSFCHs indicates negative confirmation.
The method as claimed in claim 3 is characterized in that the first PSFCH is the first PSFCH among the multiple PSFCHs, or the first PSFCH is the last PSFCH among the multiple PSFCHs.
The method according to claim 3 or 4, characterized in that the H PSFCHs include the first two HARQ information in the multiple PSFCHs, and the second PSFCH is the first PSFCH in the multiple PSFCHs;

Alternatively, the H PSFCHs include the last two PSFCHs of the multiple PSFCHs, and the second PSFCH is the last PSFCH of the multiple PSFCHs.
The method according to any one of claims 1-5 is characterized in that the multiple PSFCHs are located before a physical uplink control channel PUCCH, and the PUCCH is used to report the transmission status of the first data to a network device.
The method according to any one of claims 1-5 is characterized in that the multiple PSFCHs are indicated by the second terminal.
The method according to any one of claims 1 to 5, characterized in that the multiple PSFCHs include a PSFCH located within a shared channel occupancy time.
The method as claimed in claim 8 is characterized in that the multiple PSFCHs also include the first PSFCH in the PSFCH corresponding to the PSSCH.
The method according to any one of claims 1 to 9, characterized in that the number of PSFCHs indicating positive acknowledgment comprises: the number of PSFCHs for which positive acknowledgment has been received;

The number of PSFCHs indicating negative acknowledgement includes: the number of PSFCHs for which negative acknowledgement is received, and/or the number of PSFCHs for which positive acknowledgement and negative acknowledgement are not received.
A communication method, characterized in that the method comprises:

The second terminal receives first data from the first terminal, where the first data is carried on a sidelink physical shared channel PSSCH;

When all PSFCHs preceding the first PSFCH in the sidelink physical feedback channel PSFCH corresponding to the PSSCH are not transmitted successfully, the second terminal sends first hybrid automatic repeat request HARQ information to the first terminal through the first PSFCH, and the first PSFCH is any PSFCH in the PSFCH corresponding to the PSSCH.
The method according to claim 11, characterized in that the method further comprises:

If the second PSFCH is located within the shared channel occupancy time, the second terminal sends second HARQ information to the first terminal through the second PSFCH after sending the first HARQ information to the first terminal through the first PSFCH. The second PSFCH is any PSFCH in the PSFCH corresponding to the PSSCH and located after the first PSFCH.
A communication device, characterized in that the device comprises:

A communication unit, configured to send first data to a second terminal, wherein the first data is carried on a sidelink physical shared channel PSSCH;

a processing unit, configured to determine whether the first data is successfully transmitted through a plurality of sidelink physical feedback channels PSFCH associated with the PSSCH;

Wherein, if the multiple PSFCHs meet the first condition, the first data transmission is successful;

The first condition is related to the number of PSFCHs indicating positive acknowledgment and/or the number of PSFCHs indicating negative acknowledgment among the multiple PSFCHs, wherein the positive acknowledgment is used to indicate that the second terminal successfully receives the first data, and the negative acknowledgment is used to indicate that the second terminal does not successfully receive the first data;

And/or, the first condition is related to a target PSFCH among the multiple PSFCHs.
The apparatus according to claim 13, wherein the first condition is related to the number of PSFCHs indicating positive acknowledgment and/or the number of PSFCHs indicating negative acknowledgment in the multiple PSFCHs, including:

The first condition includes one or more of the following:

The number of PSFCHs indicating positive acknowledgement in the plurality of PSFCHs is greater than or equal to the number of PSFCHs indicating negative acknowledgement;

The number of PSFCHs indicating positive acknowledgement among the first M PSFCHs of the plurality of PSFCHs is greater than or equal to the number of PSFCHs indicating negative acknowledgement, and M is an integer greater than 1;

The number of PSFCHs indicating positive acknowledgement in the last N PSFCHs of the multiple PSFCHs is greater than or equal to the number of PSFCHs indicating negative acknowledgement, where N is an integer greater than 1;

The multiple PSFCHs include K consecutive PSFCHs indicating positive confirmation, where K is an integer greater than 0;

The multiple PSFCHs do not include P consecutive PSFCH indication negative acknowledgments, where P is an integer greater than 0;

The PSFCHs included in the first PSFCH group of the multiple PSFCHs all indicate positive confirmation, wherein the PSFCH group includes Q consecutive PSFCHs, and the Q PSFCHs indicate the same information, and Q is an integer greater than 0;

The number of consecutive PSFCHs indicating positive acknowledgement among the multiple PSFCHs is greater than or equal to the number of consecutive PSFCHs indicating negative acknowledgement;

The number of PSFCHs indicating positive acknowledgement in the plurality of PSFCHs is greater than a first value;

The number of PSFCHs indicating negative acknowledgement in the plurality of PSFCHs is less than a second value.
The apparatus according to claim 13 or 14, wherein the first condition is related to a target PSFCH among the multiple PSFCHs, including:

The first condition includes one or more of the following:

The target PSFCH is a first PSFCH among the multiple PSFCHs, and the first PSFCH indicates a positive confirmation;

The target PSFCH includes H PSFCHs among the multiple PSFCHs, and the H PSFCHs all indicate positive confirmation, or there are two PSFCHs among the H PSFCHs indicating different information, and the second PSFCH among the H PSFCHs indicates negative confirmation.
The apparatus as claimed in claim 15 is characterized in that the first PSFCH is the first PSFCH among the multiple PSFCHs, or the first PSFCH is the last PSFCH among the multiple PSFCHs.
The apparatus according to claim 15 or 16, wherein the H PSFCHs include first two HARQ information in the multiple PSFCHs, and the second PSFCH is the first PSFCH in the multiple PSFCHs;

Alternatively, the H PSFCHs include the last two PSFCHs in the plurality of PSFCHs, and the second PSFCH is the last two PSFCHs in the plurality of PSFCHs. The last PSFCH among the PSFCHs.
The device according to any one of claims 13 to 17, characterized in that the multiple PSFCHs are located before a physical uplink control channel PUCCH, and the PUCCH is used to report the transmission status of the first data to a network device.
The device according to any one of claims 13 to 17, characterized in that the multiple PSFCHs are indicated by the second terminal.
The apparatus according to any one of claims 13 to 17, wherein the multiple PSFCHs include a PSFCH located within a shared channel occupancy time.
The apparatus as claimed in claim 20 is characterized in that the multiple PSFCHs also include the first PSFCH in the PSFCH corresponding to the PSSCH.
The apparatus according to any one of claims 13 to 21, wherein the number of PSFCHs indicating positive acknowledgment comprises: the number of PSFCHs for which positive acknowledgment has been received;

The number of PSFCHs indicating negative acknowledgement includes: the number of PSFCHs for which negative acknowledgement is received, and/or the number of PSFCHs for which positive acknowledgement and negative acknowledgement are not received.
A communication device, characterized in that the device comprises:

A communication unit, configured to communicate with the first terminal;

A processing unit, configured to receive first data from a first terminal through the communication unit, where the first data is carried on a sidelink physical shared channel PSSCH;

Furthermore, when the PSFCHs preceding the first PSFCH in the sidelink physical feedback channel PSFCH corresponding to the PSSCH are not transmitted successfully, the first hybrid automatic repeat request HARQ information is sent to the first terminal through the first PSFCH by the communication unit, and the first PSFCH is any PSFCH in the PSFCH corresponding to the PSSCH.
The device according to claim 23, characterized in that the processing unit is further used to:

If the second PSFCH is located within the shared channel occupancy time, after sending the first HARQ information to the first terminal through the first PSFCH, the second HARQ information is sent to the first terminal through the communication unit through the second PSFCH, and the second PSFCH is any PSFCH in the PSFCH corresponding to the PSSCH and located after the first PSFCH.
A communication device, characterized in that it comprises a processor and a memory, wherein the memory is used to store program instructions, and when the processor executes the program instructions, the method according to any one of claims 1 to 10 is executed, or the method according to claim 11 or 12 is executed.
A computer-readable storage medium, characterized in that the computer storage medium stores computer-readable instructions, and when the computer-readable instructions are executed on a communication device, the method according to any one of claims 1 to 10 is executed, or the method according to claim 11 or 12 is executed.
A computer program product, characterized in that when the computer program product is run on a device, the device is caused to execute the method according to any one of claims 1 to 10 or the method according to claim 11 or 12.