WO2023109777A1 - Communication method, apparatus, and system - Google Patents

Abstract

Embodiments of the present application provide a communication method, apparatus, and system. The method comprises: a first terminal transmits sidelink control information to a second terminal; and the first terminal determines a first count parameter according to first information and second information, the first count parameter being used for indicating the number of continuous/discontinuous transmissions that occur on a unicast connection between the first terminal and the second terminal, wherein the first information comprises information of whether the first terminal receives a first channel on a receiving opportunity, the first channel is used for carrying sidelink feedback information, the second information comprises resource information corresponding to the first channel, and the resource information comprises a resource corresponding to the first channel being a licensed spectrum or an unlicensed spectrum. By using the method, reference can be made to the second information when the first count parameter is determined, such that the first count parameter can be determined more accurately, and the quality of sidelink communication is improved.

Description

Communication method, device and system

This application claims the priority of a Chinese patent application filed with the State Intellectual Property Office of China on December 13, 2021, with application number 202111521812.7, and application title "Communication method, device and system", the entire contents of which are incorporated by reference in this application middle.

technical field

The embodiments of the present application relate to the technical field of communication, and in particular, to a communication method, device, and system.

Background technique

In a wireless communication system, terminals can perform data communication through network equipment, or directly communicate between terminals without using network equipment. A wireless communication interface (such as a PC5 interface) between terminals is similar to an air interface (such as a Uu interface) between a terminal and a radio access network device (such as a base station). The link between terminals can also be called sidelink. A typical application scenario of sidelink communication is vehicle to everything (V2X). In the Internet of Vehicles, each vehicle is a terminal, and data transmission between vehicles can be directly performed through sidelink without going through network devices, thereby effectively reducing communication delays.

How to accurately detect the quality of the sidelink link is an urgent problem to be solved.

Contents of the invention

Embodiments of the present application provide a communication method, device, and system to improve the accuracy of sidelink link communication quality detection.

In the first aspect, the embodiment of the present application provides a communication method, which can be executed by a terminal, or by a component of the terminal (such as a processor, a chip, or a chip system, etc.), including: sending a message from the first terminal to the second terminal sending a first message, where the first message includes signaling and/or data; the first terminal determines a first counting parameter according to the first information and the second information, and the first counting parameter is used to indicate that the first The number of consecutive discontinuous transmissions that occur on the sidelink between the terminal and the second terminal, the first count parameter is used to detect the quality of the sidelink; wherein the first information includes the Whether the first terminal receives information on the first channel on the receiver, the first channel is used to carry sidelink feedback information; the second information includes resource information corresponding to the first channel, and the resource The information includes whether the resource corresponding to the first channel is a licensed spectrum or an unlicensed spectrum. In this solution, the first counting parameter is determined according to the first information and the second information to detect the quality of the sidelink, which improves the detection accuracy.

In a possible manner, using the first count parameter to detect the quality of the sidelink includes: the first terminal determines whether a sidelink wireless link occurs or does not occur according to the first count parameter. fail. In this manner, the SL RLF detection is performed according to the first count parameter, and the quality of the SL link is measured by the first count parameter.

Optionally, the determining by the first terminal that a sidelink radio link failure occurs or does not occur according to the first count parameter includes: determining by the first terminal that a sidelink radio link failure occurs or does not occur according to the first count parameter and threshold information A sidelink radio link failure has occurred.

In a possible manner, the determining the first counting parameter includes adding 1 to the value of the first counting parameter, or not adding 1 to the value of the first counting parameter, or adding 1 to the value of the first counting parameter The parameters are initialized to 0.

In a possible manner, the first terminal determining the first counting parameter according to the first information and the second information includes:

The first terminal determines to add 1 to the value of the first count parameter for the licensed spectrum according to not receiving the first channel and the resources corresponding to the first channel on the receiving opportunity; or,

The first terminal determines not to add 1 to the value of the first count parameter for the unlicensed spectrum according to not receiving the first channel on the receiving opportunity and the resources corresponding to the first channel; or,

The first terminal determines to initialize the first count parameter to 0 for an unlicensed spectrum according to receiving the first channel and the resources corresponding to the first channel on the receiving opportunity; or,

The first terminal determines to initialize the first count parameter to 0 based on receiving the first channel on the receiver.

In this way, the first counting parameter is determined according to whether the first channel and the resource information corresponding to the first channel are received at the receiver, which improves the counting accuracy of the first counting parameter.

Optionally, the first terminal receives feedback information from the second terminal in response to the first message.

In a possible manner, the first parameter of the resource pool corresponding to the unlicensed spectrum carrier satisfies the first condition, and the first condition is greater than or equal to the first threshold, or belongs to the first list, or belongs to the first range , the first parameter includes a resource quality parameter or a signal quality parameter. In this way, when the first condition is met, the terminal triggers to perform SL link quality detection.

Optionally, the determining by the first terminal that a sidelink radio link failure occurs or does not occur according to the first count parameter and threshold information includes: the first terminal determines that the first count parameter is greater than or equal to the The threshold information determines that the sidelink radio link failure occurs; or, the first terminal determines that the sidelink radio link failure does not occur according to the first count parameter being less than the threshold information.

In a possible manner, the threshold information includes a first threshold and/or a second threshold, where the first threshold corresponds to the SL using authorized spectrum communications, and the second threshold corresponds to the SL uses unlicensed spectrum to communicate. Optionally, the second threshold is greater than the first threshold. Optionally, the threshold information is configured by the network device, or is predefined or preconfigured. In this manner, different thresholds are set, which improves the accuracy of SL link detection and enhances the quality of SL communication.

In the second aspect, the embodiment of the present application provides a communication method, which can be executed by a terminal, or by a component of the terminal (such as a processor, a chip, or a chip system, etc.), including: sending a message from the first terminal to the second terminal sending a first message, the first message including signaling and/or data; the first terminal receiving a second message from the second terminal; the first terminal updating a first count according to the second message parameter, the first counting parameter is used to indicate the number of consecutive and discontinuous transmissions that occur in SL between the first terminal and the second terminal; wherein, the second message includes the first indication information and/or comes from For the data information of the second terminal, the first indication information includes information used to indicate that the first channel is not successfully sent, and the first channel is used to carry sidelink feedback information. Through this solution, the first terminal updates the first counting parameter according to the indication information sent by the second terminal, and the accuracy of the first counting parameter is improved through interaction between the terminals.

In a possible manner, the first terminal determines whether a sidelink radio link failure occurs or does not occur according to the first count parameter and threshold information.

Optionally, the determining by the first terminal that a sidelink radio link failure occurs or does not occur according to the first count parameter includes: determining by the first terminal that a sidelink radio link failure occurs or does not occur according to the first count parameter and threshold information A sidelink radio link failure has occurred. In this manner, the SL RLF detection is performed according to the first count parameter, and the quality of the SL link is measured by the first count parameter.

Optionally, the information that the first channel is not sent successfully includes the number of times that the first channel is not sent successfully. Optionally, the information that the first channel is not sent successfully includes a reason why the first channel is not sent successfully, and the reason includes a channel access process failure of the first channel, or a priority of the first channel low level.

Optionally, the first terminal receives feedback information from the second terminal in response to the first message.

In a possible manner, the first terminal updating the first count parameter according to the second message includes: the first terminal initializing the first count parameter to 0 according to the second message, or rolling back the Describe the first count parameter.

Optionally, the rolling back the first count parameter includes: subtracting 1 from the first count parameter, or subtracting the first count parameter from the failed sending indicated by the first indication information. frequency.

In this manner, the first terminal rolls back the first counting parameter according to the instruction of the second terminal, which reduces unreasonable counting times, improves counting accuracy, and avoids triggering unreasonable wireless link failures.

In the third aspect, the embodiment of the present application provides a communication method, which can be executed by a terminal, or by a component of the terminal (such as a processor, a chip, or a chip system, etc.), including: the second terminal receives the communication from the first A first message from a terminal, where the first message includes signaling and/or data; the second terminal sends a second message to the first terminal, where the second message includes first indication information and/or data information , the first indication information includes information indicating that the first channel is not successfully sent, and the first channel is used to carry sidelink feedback information. Through this solution, the second terminal sends a message to the first terminal to assist the first terminal in performing link quality detection, thereby improving the accuracy of link quality detection.

Optionally, the first channel is used to respond to the first message.

In a possible manner, the second terminal determines the second message.

Optionally, determining the second message includes determining first indication information and/or data information.

In a possible manner, the second terminal performs listen-before-talk LBT on the feedback resource.

Optionally, the second terminal sends feedback information in response to the first message to the first terminal.

In this manner, the second terminal sends indication information for the first terminal to determine whether to roll back the first count parameter.

In a fourth aspect, the embodiment of the present application provides a communication device, and the device may be a first terminal, or may be a chip for the first terminal. The device has the function of implementing the first aspect, or the second aspect, or each possible implementation method of the first aspect, or each possible implementation method of the second aspect. This function may be implemented by hardware, or may be implemented by executing corresponding software on the hardware. The hardware or software includes one or more modules corresponding to the above functions.

In a possible design, the device has the function of realizing the above first aspect, or each possible implementation method of the first aspect. In a possible design, the device may include a transceiver unit and a processing unit. Exemplarily:

a transceiver unit, configured to send a first message to a second terminal, where the first message includes signaling and/or data;

A processing unit, configured to determine a first counting parameter according to the first information and the second information, where the first counting parameter is used to indicate the number of continuous and discontinuous transmissions that occur on the sidelink link between the device and the second terminal The number of times, the first count parameter is used to detect the quality of the sidelink; wherein, the first information includes whether the device receives the information of the first channel on the receiver, and the first channel uses The second information includes resource information corresponding to the first channel, and the resource information includes whether the resource corresponding to the first channel is a licensed spectrum or an unlicensed spectrum.

Optionally, the processing unit is further configured to determine whether a sidelink radio link failure occurs or does not occur according to the first count parameter.

Optionally, the transceiving unit is further configured to receive feedback information from the second terminal in response to the first message.

In a possible design, the device has the function of realizing the above-mentioned second aspect, or each possible implementation method of the second aspect. In a possible design, the device may include a transceiver unit and a processing unit. Exemplarily:

a transceiver unit, configured to send a first message to a second terminal, where the first message includes signaling and/or data;

The transceiving unit is further configured to receive a second message from the second terminal;

The processing unit is configured to update a first count parameter according to the second message, where the first count parameter is used to indicate the number of consecutive and discontinuous transmissions that occur in SL between the device and the second terminal; wherein, the The second message includes first indication information and/or data information from the second terminal, the first indication information includes information indicating that the first channel has not been sent successfully, and the first channel is used for the bearer side Link feedback information.

Optionally, the processing unit is further configured to determine whether a sidelink radio link failure occurs or not according to the first count parameter and threshold information.

In a fifth aspect, the embodiment of the present application provides a communication device, and the device may be a second terminal, or may be a chip for the second terminal. The device has the function of realizing the above-mentioned third aspect, or each possible realization method of the third aspect. This function may be implemented by hardware, or may be implemented by executing corresponding software on the hardware. The hardware or software includes one or more modules corresponding to the above functions.

In a possible design, the device has the function of realizing the above third aspect, or each possible implementation method of the third aspect. In a possible design, the device may include a transceiver unit and a processing unit. Exemplarily:

a transceiver unit, configured to receive a first message from a first terminal, where the first message includes signaling and/or data;

The transceiver unit is further configured to send a second message to the first terminal, the second message includes first indication information and/or data information, and the first indication information includes information indicating that the first channel is not sent For successful information, the first channel is used to carry sidelink feedback information.

Optionally, the first channel is used to respond to the first message.

Optionally, the processing unit is configured to determine the second message.

It is easy to understand that the above descriptions of the fourth aspect and the fifth aspect are only examples, and to avoid redundant description, reference may be made to the relevant descriptions of the corresponding method aspects (eg, the first aspect to the third aspect).

In a sixth aspect, the embodiment of the present application provides a communication device, including a processor, the processor is coupled to a memory; the memory is used to store programs or instructions, and when the device is running, the processor executes the The computer executes instructions, so that the device executes the methods of the first aspect to the third aspect, and any method in the possible implementation methods of the first aspect to the third aspect.

In the seventh aspect, the embodiment of the present application provides a communication device, including the method for performing the above-mentioned first aspect to the third aspect, and each step of any method in the possible implementation methods of the first aspect to the third aspect Unit or means (means).

In the eighth aspect, the embodiment of the present application provides a communication device, including a processor and an interface circuit, the processor is used to communicate with other devices through the interface circuit, and execute the methods from the first aspect to the third aspect above, the first aspect to any of the possible implementation methods of the third aspect. The processor includes one or more.

In the ninth aspect, the embodiment of the present application provides a communication device, including a processor, configured to be connected to a memory, and used to call a program stored in the memory, so as to execute the methods of the first aspect to the third aspect above, the first Any method in the possible implementation methods of the aspect to the third aspect. The memory may be located within the device or external to the device. And the processor includes one or more.

In the tenth aspect, the embodiment of the present application also provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the computer-readable storage medium is run on a computer, the processor executes the above-mentioned first aspect to the third aspect. The method, any method among the possible implementation methods of the first aspect to the third aspect.

In the eleventh aspect, the embodiment of the present application further provides a computer program product, the computer product includes a computer program, and when the computer program is run, the method of the first aspect to the third aspect above, the method of the first aspect to the third aspect Any of the possible implementation methods is executed.

In the twelfth aspect, the embodiment of the present application also provides a chip system, including: a processor, configured to execute the above-mentioned methods from the first aspect to the third aspect, and each possible implementation method of the first aspect to the third aspect any method.

In the thirteenth aspect, the embodiment of the present application also provides a communication system, including: the first terminal in any possible manner of the first aspect or the second aspect above and any possible manner described in the third aspect above mode in the second terminal.

Optionally, the communication system may also include network equipment.

Wherein, the technical effect brought by any one of the implementations from the fourth aspect to the thirteenth aspect can refer to the technical effect brought by the data transmission method described in any possible design of any of the above-mentioned aspects, and will not be repeated here. .

Description of drawings

FIG. 1A is a schematic diagram of a relationship between a PSSCH and a PSFCH provided in an embodiment of the present application;

FIG. 1B is a schematic diagram of PSFCH transmission in an unlicensed spectrum communication provided by an embodiment of the present application;

FIG. 1C is a schematic diagram of a network architecture applicable to the embodiment of the present application;

FIG. 2 is a schematic diagram of a communication method provided by an embodiment of the present application;

FIG. 3 is a schematic diagram of another communication method provided by the embodiment of the present application;

FIG. 4 is a schematic diagram of another communication method provided by the embodiment of the present application;

FIG. 5 is a schematic diagram of another communication method provided by the embodiment of the present application;

FIG. 6 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

FIG. 7 is a schematic structural diagram of a terminal provided in an embodiment of the present application;

FIG. 8 is a schematic diagram of another communication device provided by an embodiment of the present application.

Detailed ways

In order to facilitate understanding of the embodiments of the present application, some terms or concepts involved in the embodiments of the present application are briefly described.

In a wireless communication system, data communication between terminals may be performed through a network device, or communication between terminals may be performed without using a network device. The wireless interface (eg, PC5 interface) between terminals is similar to the wireless interface (eg, Uu interface) between terminals and network equipment.

A link between terminals may be called a side link, or a side link, or a side link, or a PC5 interface link, or a link between terminals. One or more of broadcast communication, unicast communication and multicast communication is generally supported on a sidelink (sidelink). A typical application scenario of sidelink communication is vehicle-to-everything (V2X). In the Internet of Vehicles, each car is a terminal, and data transmission between cars can be carried out directly through sidelink without going through network devices, which can effectively reduce communication delays.

Broadcast communication is similar to network equipment (such as a base station) broadcasting system information, that is, the terminal does not encrypt the data of the broadcast service, and any other terminal within the effective receiving range can receive the broadcast service if it is interested data.

Unicast communication is similar to data communication after a radio resource control (RRC) connection is established between a terminal and a base station, and requires a unicast connection to be established between terminals. After the unicast connection is established, the above-mentioned terminal can perform data communication based on the negotiated identifier, and the data can be encrypted or unencrypted. Compared with broadcast communication, in unicast communication, generally, unicast communication is performed between terminals that have established a unicast connection. In a possible implementation, in unicast communication, when the terminal sends data, it will send a source identifier and a destination identifier along with the data, where the source identifier is generally allocated by the transmitting user equipment (transmission user equipment, TX UE), and the destination The identifier is generally the identifier assigned by the receiving user equipment (RX UE) for the unicast connection, where the TX UE refers to the terminal that sends data or signaling, and the RX UE refers to the terminal that receives data or signaling from the TX UE. command terminal.

Multicast communication refers to communication between terminals in a communication group, and the terminals in the group can send and receive data of the multicast service.

In this embodiment of the present application, the destination address (destination) may also be referred to as a destination identifier.

In unicast communication, the destination address can be used to identify a receiving terminal; in multicast communication, the destination address can be used to identify a group; in broadcast communication, the destination address can be used to identify a service. It can be understood that the destination address may be a destination layer 2 identifier (destination L2ID). In other words, the destination layer 2 identifier is an example of the destination address.

The terminal can communicate with network devices, where the spectrum resources can include licensed spectrum resources (which may be referred to as licensed spectrum for short) and unlicensed spectrum resources (which may be referred to as unlicensed spectrum for short).

Licensed spectrum generally refers to certain organizations or operators, while unlicensed spectrum is generally shared spectrum, which can be used by different operators or organizations. In one possible way, before using the unlicensed spectrum to send information (for example, data or signaling), terminals and network devices need to perform a listen before talk (LBT) process (also called channel access). process), that is, the terminal needs to determine whether the channel is idle before sending data.

Generally, LBT is performed at the granularity of channels (eg, 20 MHz). Before a communication device sends a signal (for example, a data signal) on a certain channel (for example, a first channel), it may first detect whether the first channel is free, for example, whether it is detected that a nearby communication device is occupying the first channel Sending a signal, this detection process may be called a clear channel assessment (clear channel assessment, CCA) or a channel access process.

Exemplarily, the channel access process may include two types, denoted as the first type of channel access process and the second type of channel access process.

The first type of channel access process (which may also be referred to as a channel access process based on a fixed duration) may be: energy detection based on a fixed duration, for a certain bandwidth, such as 20MHz, a communication device (the communication device may be a terminal device, It can also be a network device) if the signal energy received by the network device is less than or equal to the first preset threshold within a fixed period of time, then the channel is considered to be idle, so that the communication device can use the idle channel to transmit data; otherwise, the channel is considered to be busy, so that the communication device Do not use this busy channel for data transfer.

The second type of channel access process (also called back-off-based channel access process) can be: energy detection based on back-off mechanism, for a certain bandwidth, a window is defined, and the window defines the number of time slots to be detected The communication device randomly selects a value A from this window (or value range), and after the communication device detects at least A idle energy detection time slots, the channel is considered to be idle, so that the communication device can use the idle time slot otherwise, the channel is considered busy, so the communication device does not use the busy channel to transmit data. Wherein, idle energy detection refers to that the received signal energy within a fixed duration is less than or equal to a second preset threshold. Wherein, the first preset threshold and the second preset threshold may be predefined, such as protocol predefined, which is not limited. In addition, there is no restrictive relationship between the first preset threshold and the second preset threshold, which may be the same , can also be different.

Two results can be obtained when the channel access process is performed: the channel access process is completed (also referred to as LBT success) and the channel access process is not completed (also referred to as LBT failure). Among them, there are multiple time-domain starting positions in the time-frequency resources used for data transmission, and the channel is determined to be idle before any time-domain starting position, then the channel access process can be considered as completed; before all time-domain starting positions If it is determined that the channel is busy, it can be considered that the channel access process is not completed.

It is easy to understand that a difference from traditional wireless air interface (such as Uu interface) communication is that in a possible implementation, in a scenario based on licensed spectrum work, after the base station schedules uplink resources for the terminal, the terminal can directly use the Uplink resources are used for uplink transmission. In a scenario based on unlicensed spectrum, after the base station schedules uplink resources for the terminal, the terminal still needs to perform LBT on the uplink resources. After the LBT is successful, the uplink resources can be used for uplink transmission. In other words, if LBT fails on the scheduled uplink resource, the scheduled uplink resource cannot be used.

Generally, a sidelink grant (sidelink grant, SL grant) may be scheduled by the base station or selected and obtained by the terminal from a configured resource pool. In the traditional scheme, SL grant is used to determine a set (a set) of physical sidelink control channel (physical sidelink control channel, PSCCH) duration (duration(s)) and a set of physical sidelink shared channel (physical sidelink shared channel, PSSCH ) duration(s). Physical sidelink feedback channel (physical sidelink feedback channel, PSFCH) resources do not require a terminal (for example, user equipment (user equipment, UE)) to obtain an SL grant in advance, but are determined through associated PSSCH resources. Specifically, the RX UE starts to transmit PSFCH on the first slot including PSFCH resources after the last time slot (slot) interval (also called interval resource, such as sl-MinTimeGapPSFCH) received by PSSCH, as shown in Figure 1A . The sl-MinTimeGapPSFCH is configured in the resource pool, which can be 2 slots or 3 slots specifically.

In a possible implementation manner, the terminal uses an unlicensed spectrum for communication. As shown in Figure 1B, after the TX UE sends the PSCCH and PSSCH to the RX UE, the RX UE directly determines the PSFCH resource according to the location of the PSSCH resource and the sl-MinTimeGapPSFCH configured in the resource pool, and further needs to perform LBT on the PSFCH resource. When LBT After success, a hybrid automatic repeat request (hybrid automatic repeat request, HARQ) is sent on the PSFCH resource to feed back to the TX UE. Correspondingly, the TX UE also receives HARQ feedback on the corresponding PSFCH resource.

Sidelink unicast and multicast communication generally support HARQ feedback. In a possible implementation, HARQ feedback is fed back on PSFCH resources. In addition, SL HARQ feedback also supports activation (enabled) or deactivation (disabled).

There are generally two ways for a terminal to obtain sidelink resources, which are called mode 1 (mode1) and mode 2 (mode2). When working in mode1, the terminal obtains SL resources from the base station. Specifically, the base station can schedule SL resources for the terminal through downlink control information (DCI), or configure SL configuration authorization (configured grant) for the terminal through RRC messages. . When working in Mode2, the terminal can receive the SL resource pool configuration from the base station, or obtain the SL resource pool configuration from the pre-configuration, and then select the SL resource in the SL resource pool for transmission. Specifically, the selection may be randomly selected, or selected based on a result of sensing or partial sensing.

In order to introduce the technical solutions of the present application more clearly and completely, some embodiments of the present application will be described below in conjunction with the accompanying drawings.

As shown in FIG. 1C , it is a schematic diagram of a network architecture applicable to the embodiment of the present application, including at least two terminals (for example, a first terminal and a second terminal) and at least one network device. Optionally, the first terminal may communicate with the network device through a wireless interface (such as a Uu interface). Terminals can communicate through network devices, or directly communicate, such as communicating through PC5 interfaces between terminals.

It should be understood that the number of devices in the communication architecture shown in FIG. 1C is only for illustration, and the embodiment of the present application is not limited thereto. In practical applications, more terminals and more network devices may be included in the communication architecture. Other devices may be included. For example, although not shown, in addition to the network functional entities shown in FIG. 1C , the network architecture shown in FIG. 1C may also include other functional entities, such as core network elements, etc., without limitation.

Exemplarily, a terminal (terminal) in FIG. 1C, also referred to as a terminal device, is a device with a wireless transceiver function, which can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; it can also be deployed on water ( Such as ships, etc.); can also be deployed in the air (such as aircraft, balloons and satellites, etc.). The terminal may be a user equipment (user equipment, UE), a mobile phone (mobile phone), a tablet computer (pad), a computer with a wireless transceiver function, a virtual reality (virtual reality, VR) terminal, an augmented reality (augmented reality, AR) ) terminals, wireless terminals in industrial control, wireless terminals in self driving, wireless terminals in remote medical, wireless terminals in smart grid, transportation security Wireless terminals in (transportation safety), wireless terminals in smart city (smart city), wireless terminals in smart home (smart home), user equipment (user equipment, UE), etc. In the embodiments of the present application, direct communication is supported between terminals, and direct communication between terminals may also be referred to as D2D communication.

Exemplarily, the network device in FIG. 1C is a device that provides a wireless communication function for a terminal, and the network device includes but is not limited to: a next-generation base station (gnodeB, gNB) in the fifth generation (5th generation, 5G), an evolved Evolved node B (evolved node B, eNB), radio network controller (radio network controller, RNC), node B (node B, NB), base station controller (base station controller, BSC), base transceiver station (base transceiver station , BTS), home base station (for example, home evolved nodeB, or home node B, HNB), baseband unit (baseBand unit, BBU), transmission point (transmitting and receiving point, TRP), transmission point (transmitting point, TP), mobile switching center, etc.

Exemplarily, the logical architecture of the network device may adopt a separation mode of a centralized unit (centralized unit, CU) and a distributed unit (distributed unit, DU). Based on the configuration of the protocol stack function, the CU-DU logic system can be divided into two types, namely, the CU-DU separation architecture and the CU-DU fusion architecture. For the CU-DU separation architecture, the functions of the protocol stack can be dynamically configured and divided, some of which are implemented in the CU, and the remaining functions are implemented in the DU. To meet the needs of different segmentation options, both ideal and non-ideal transport networks need to be supported. The interface between the CU and the DU should follow the specification requirements of the 3rd generation partnership project (3rd generation partnership project, 3GPP). For the CU-DU fusion architecture, the logical functions of CU and DU are integrated in the same network device to realize all functions of the protocol stack.

The network architecture shown in FIG. 1C above can be applied to communication systems of various wireless access technologies, for example, it can be a long term evolution (long term evolution, LTE) communication system, or it can be a 5G (or new radio (new radio) , NR) communication system, also can be the transitional system between LTE communication system and 5G communication system, this transitional system also can be called 4.5G communication system, also can be future communication system of course. The network described in the embodiment of this application The architecture and business scenarios are for more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute limitations on the technical solutions provided by the embodiments of the present application. Those of ordinary skill in the art know that with the evolution of the communication network architecture and new business The technical solutions provided by the embodiments of the present application are also applicable to similar technical problems when the scene arises.

Link quality is one of the important indicators for measuring communication quality or communication experience. In a possible implementation, the terminal measures the link quality according to whether radio link failure (RLF) occurs. For example, after the sidelink where the terminal is located satisfies a predetermined condition or a trigger condition, the terminal will trigger SL RLF. Exemplarily, the predetermined condition may be that the SL detects multiple consecutive SL discontinuous transmissions (discontinuous transmission, DTX). However, it may happen that the link quality between the TX UE and the RX UE may be relatively good or the distance between the two is not too far, and an unreasonable SL RLF is triggered.

How to improve the accuracy of detecting sidelink quality is an urgent problem to be solved. Specifically, how to improve the accuracy of judging the occurrence of SL RLF is an urgent problem to be solved.

FIG. 2 is a communication method 200 provided by an embodiment of the present application, which is used to improve the accuracy of detecting sidelink quality. The method is executed interactively between a first terminal (referred to as UE1 for short) and a second terminal (referred to as UE2 for short), and of course may also be executed interactively between components of UE1 and UE2, such as a chip or a chip system. For ease of introduction, in the following, the method is performed by UE1 and UE2 as an example. As shown in FIG. 2, the method 200 may include the following steps:

S201: UE1 sends a first message to UE2.

Correspondingly, UE2 receives the first message from UE1.

It is easy to understand that the first message may be understood as a message transmitted during communication between UE1 and UE2, for example, the first message may include signaling and/or data. For example, the first message includes control information, which is not limited in this embodiment of the present application.

In a possible implementation manner, UE1 sends sidelink control information (sidelink control information, SCI) to UE2, that is, the first message is SCI.

Optionally, the SCI has multiple possible implementation manners or information carrying manners.

For example, SCI adopts a hierarchical indication method. Specifically, SCI includes first stage SCI and second stage SCI, wherein the first stage SCI is carried on the PSCCH, and the second stage SCI is carried on the PSSCH. . The first-level SCI will indicate time-frequency domain resources for PSSCH transmission, and the second-level SCI will indicate HARQ feedback activation (enabled) or HARQ feedback deactivation (disabled).

In a possible design, the SCI does not use a hierarchical indication method, which is not limited in this embodiment of the present application.

In yet another possible implementation manner, UE1 sends data (also called a data packet) to UE2.

It is easy to understand that in the embodiment of the present application, UE1 is a data sending UE, which can work in mode1 or mode2, and after obtaining SL resources, use the SL resources to send data to UE2. UE2 is the data receiving end UE, and after receiving the data sent by UE1, it can send HARQ feedback to UE1 on the feedback resource (such as PSFCH).

The sending of the first message from UE1 to UE2 may be understood as that UE1 sends multiple messages to UE2, or sends messages periodically, or sends messages when there is a need for communication. The embodiment of the present application does not limit the number of messages and the timing of sending messages.

S202: UE2 performs LBT on the feedback resources.

Optionally, after receiving the first message, UE2 determines feedback resources, where the feedback resources are used by UE2 to send feedback information in response to the first message to UE1. It is easy to understand that this embodiment of the present application does not limit the timing for UE2 to determine the feedback resources.

It is easy to understand that the feedback resource can also be replaced by a channel of the feedback resource. That is, step S202 may be referred to as UE2 performing LBT on the PSFCH.

Wherein, the feedback resources may be licensed spectrum resources or unlicensed spectrum resources.

In a possible manner, the feedback resource is a PSFCH resource. It is easy to understand that the embodiment of the present application does not limit the type of the feedback resource. The following uses the PSFCH resource as an example for introduction.

It is easy to understand that when the feedback resources are authorized spectrum resources, UE2 may not perform step S202, that is, step S202 is an optional step. Several possible ways in which step S202 is not performed are exemplarily introduced. In one possible way, other devices help UE2 perform LBT on feedback resources and indicate the LBT result to UE2, and UE2 may not perform step S202. In yet another possible manner, when the transmission of the first message is based on the unlicensed spectrum (or when the PSFCH feedback resource itself corresponds to the unlicensed spectrum), UE2 needs to perform LBT on the PSFCH resource. It is easy to understand that when the feedback resources are unlicensed spectrum resources, in a possible implementation, UE2 performs LBT on the feedback resources.

UE2 may have various possible implementations of LBT.

In a possible implementation manner, when UE2 receives the first stage SCI, it triggers LBT on the PSFCH resource. In this way, UE2 can trigger LBT on PSFCH as early as possible.

In yet another possible implementation manner, when UE2 receives the second stage SCI, it triggers LBT on the PSFCH resource. Optionally, when UE2 receives the second stage SCI and is interested in the SCI (interested in the L1ID included in the second stage SCI) and the second stage SCI indicates that HARQ feedback is enabled, LBT is triggered on the PSFCH resource. In this way, unnecessary LBT of PSFCH resources can be avoided, and additional power consumption waste of UE2 can be reduced. That is to say, when UE2 determines that the condition for triggering LBT on PSFCH is not met, UE2 does not perform LBT on the feedback resource, and in this case, step S202 may not be executed.

S203: (optional step) UE2 sends the first channel to UE1.

Optionally, the first channel is PSFCH.

The sending channel in the embodiment of the present application, for example, sending the PSFCH may be understood as sending feedback information on the PSFCH channel, and for example, sending the PSFCH may be understood as sending feedback information on the PSFCH resource.

Optionally, when UE2 performs LBT on PSFCH and the LBT is successful, UE2 sends PSFCH to UE1. That is, when the LBT of the feedback resource is successful in step S202, step 203 is executed.

Of course, in a possible manner, when the feedback resource is an authorized spectrum resource, step 203 is executed after step 201 is executed.

S203 can be understood as UE2 sending a PSFCH in response to the first message to UE1.

Considering the resource information required for sending and the sending priority information, there may be a situation where UE2 does not send PSFCH to UE1. For example, when UE2 performs LBT on PSFCH but the LBT fails, UE2 fails to send PSFCH to UE1.

In yet another possible manner, PSFCH transmission or transmission is not transmitted due to low priority due to priority conflict. Specifically, it can be understood that UE2 sends to UE1 the PSFCH in response to the first message but does not send it because the priority is low, and chooses to send other information with high priority.

In another possible manner, UE2 sends PSFCH to UE1, but UE1 fails to receive the PSFCH. The reason why UE1 fails to receive the PSFCH may be that the quality of the side link is poor, for example, packet loss occurs during transmission.

In the above multiple ways, UE1 may not receive the feedback information in response to the first message. Therefore, UE1 needs to perform accurate measurement on the sidelink to improve communication quality.

S204: UE1 performs sidelink (SL) quality detection.

Or it can also be called that UE1 performs SL RLF detection, and the following takes the sidelink quality detection as SL RLF detection as an example for introduction.

Optionally, the sidelink refers to a sidelink between UE1 and UE2. In a possible manner, the SL is a unicast connection (or called PC5 RRC connection) between UE1 and UE2.

In a possible implementation manner in which UE1 performs SL quality detection, UE1 performs SL quality detection according to the first information and the second information.

Wherein, the first information includes sidelink feedback information (hereinafter may also be referred to as feedback information for short), or the first information is information corresponding to or associated with the feedback information, and the feedback information may be information in response to the first message. For example, the first information is related to the feedback information sent by UE2 after receiving the first message. It is easy to understand that the feedback information may be used to indicate that UE2 has received the first message, for example, the feedback information is SL HARQ feedback information.

Exemplarily, the first information includes information about whether UE1 has received a first channel on a receiving opportunity, and the first channel is used to carry sidelink feedback information. When UE1 does not receive the first channel or does not receive the feedback information in response to the first message at the receiving opportunity, UE1 determines that this transmission is SLDTX.

Optionally, the first information includes information about whether UE1 has received the first channel in multiple receiving opportunities. Optionally, the multiple receiving opportunities may be consecutive multiple receiving opportunities or discontinuous multiple receiving opportunities.

Wherein, the second information includes resource information and/or priority information, and the resource information may be resource information related to this transmission. It is easy to understand that this transmission may include the first message sent by UE1 to UE2 and possible UE2 Feedback information in response to the first message. For example, the resource information is resource information corresponding to the first channel, and of course may also be resource information corresponding to the first message, for example, resource information used to send the first message. Exemplarily, the resource information includes whether the resource corresponding to the first channel is a licensed spectrum or an unlicensed spectrum. It is easy to understand that this embodiment of the present application does not limit that the resource information does not include other possible resource types. For example, if this type of resource may cause the feedback information to fail to be sent successfully, the resource type may also be included in the resource information. For example, the The type of resource is a high frequency resource or a millimeter wave resource. The priority information may include transmission priority information, for example, the priority information is the priority for UE2 to transmit the PSFCH.

The second information may be understood as including reason information of failure to send the feedback information, and the cause information may include LBT failure or low priority.

In a possible manner, UE1 determines the second information autonomously. For example, UE1 determines the second information according to resource information corresponding to the first message, and for another example, UE1 determines the second information according to resource information corresponding to the first channel. Optionally, UE1 determining the second information includes UE1 determining resource information in the second information.

In yet another possible manner, UE1 receives the second information from other network elements or devices. For example, the method 200 may further include: UE1 receives second information from UE2. Optionally, the second information includes information about the number of sending failures.

Optionally, step S204 is executed when a preset condition is met. For example, the first parameter of the resource pool satisfies the first condition, and the first condition includes that the first parameter is greater than or equal to the first threshold (or belongs to the first list or belongs to the first range). Optionally, the first parameter is an unauthorized The parameters of the resource pool corresponding to the spectrum carrier, for example, the first parameter is a channel busy rate (channel busy radio, CBR), or the first parameter includes a resource quality parameter or a signal quality parameter. Optionally, the unlicensed spectrum carrier is the unlicensed spectrum carrier corresponding to UE1.

Through the above method, UE1 determines the sidelink quality according to the first information and the second information, which improves the accuracy of sidelink quality detection and avoids triggering unreasonable SL RLF. For example, considering whether to receive the feedback information and the reason information of the failure of sending the feedback information (for example, the LBT failure and/or low priority of the resource carrying the feedback information), it is possible to avoid the LBT failure of the PSFCH resource or the internal priority problem of UE2 As a result, the PSFCH transmission is not sent with low priority, and unreasonable SL RLF is triggered on the UE1 side, which improves the SL communication quality.

Based on the scheme in Fig. 2, Fig. 3, Fig. 4 and Fig. 5 respectively provide detailed communication method examples. Next, please refer to FIG. 3 , which shows a schematic flowchart of a communication method provided by an embodiment of the present application. The embodiment shown in FIG. 3 is used alone or in combination with the embodiment shown in FIG. 2 .

UE1 performs SL RLF detection according to the first information and the second information. For example, when performing PSFCH transmission based on the unlicensed spectrum, the UE1 does not count the continuous SLDTX of the unicast connection when the PSFCH is not received, and a different threshold value of the SLDTX count can be configured for communication on the unlicensed spectrum.

S301: UE1 sends a first message to UE2.

Correspondingly, UE2 receives the first message from UE1.

S302: (optional step) UE2 performs LBT on the feedback resources.

S303: (optional step) UE2 sends the first channel to UE1.

Wherein, for the specific implementation of S301-S303, reference may be made to relevant descriptions of S201-S203, which will not be repeated here.

S304: UE1 performs sidelink quality detection.

Wherein, S304 includes the following steps:

S304-1: UE1 determines a first count parameter according to the first information and the second information, where the first count parameter is used to indicate the number of consecutive discontinuous transmissions that occur on the sidelink between UE1 and UE2.

Wherein, the first count parameter can be understood as being used to detect or reflect the quality of the sidelink.

Optionally, determining the first count parameter includes adding 1 to the value of the first count parameter, or not adding 1 to the value of the first count parameter, or initializing the first count parameter to 0.

In a possible implementation manner (referred to as determination manner 1), UE1 determining the first counting parameter according to the first information and the second information includes:

UE1 determines to add 1 to the value of the first count parameter for the licensed spectrum according to not receiving the first channel and the resource corresponding to the first channel on the receiving opportunity; or,

UE1 determines not to add 1 to the value of the first count parameter for the unlicensed spectrum according to not receiving the first channel on the receiving opportunity and the resources corresponding to the first channel; or,

The UE1 determines to initialize the first count parameter to 0 for the unlicensed spectrum according to receiving the first channel and the resources corresponding to the first channel on the receiving opportunity.

It is easy to understand that the embodiment of the present application does not limit the determination order of UE1, and UE1 may perform determination according to the first information and the second information at the same time, or may determine sequentially. For example, UE1 may first determine the first counting parameter according to the first information, and on this basis, UE1 then determines the first counting parameter according to the second information. Exemplarily, after UE1 determines that the value of the first count parameter is increased by 1 based on not receiving the first channel on the receiving opportunity, UE1 then judges the resource information corresponding to the first channel, and determines whether to update the first channel according to the judgment result. A count parameter. For example, when the resource corresponding to the first channel is an unlicensed spectrum, it is determined to decrement the value of the first count parameter by 1, and when the resource corresponding to the first channel is a licensed spectrum, UE1 determines not to add 1 to the value of the first count parameter .

In yet another possible implementation (denoted as determination mode 2), UE1 determining the first counting parameter according to the first information and the second information may be replaced by UE1 determining the first counting parameter according to the first information. In this mode 2 ,include:

UE1 determines to add 1 to the value of the first count parameter according to not receiving the first channel on the receiver;

UE1 determines to initialize the first count parameter to 0 according to receiving the first channel on the receiver opportunity.

S304-2: UE1 performs SL RLF detection according to the first count parameter.

Wherein, the SL RLF detection performed by UE1 can also be understood as UE1 determines that SL RLF occurs or does not occur on the sidelink.

Optionally, UE1 determines whether SL RLF occurs or not according to the first count parameter and threshold information.

In a possible implementation, UE1 determines whether SL RLF occurs or does not occur according to the first count parameter and threshold information including:

UE1 determines that SL RLF occurs according to the information that the first count parameter is greater than or equal to the threshold; or,

UE1 determines that SL RLF does not occur according to the information that the first count parameter is less than the threshold.

It is easy to understand that when UE1 determines that the first counting parameter is equal to the threshold information, in one mode, it is determined that SL RLF has occurred, and in another mode, it may also be determined that SL RLF has not occurred, which is not limited by this embodiment of the present application.

Optionally, the threshold information includes a first threshold and/or a second threshold, where the threshold corresponds to resource type information, that is to say, different resource types correspond to different thresholds, for example, the first threshold corresponds to sideline The link uses the licensed spectrum for communication, and the second threshold corresponds to the SL using the unlicensed spectrum for communication. The embodiment of the present application does not limit the inclusion of only two thresholds, the number and size of the thresholds can be determined according to the resource type information, for example, if the resource type also includes millimeter wave resources, the threshold information can also include a third threshold, the third threshold Corresponding to the use of millimeter wave resources for SL.

Optionally, the second threshold is greater than the first threshold. Optionally, the threshold information is configured by the network device, or is predefined or preconfigured.

Optionally, different thresholds correspond to different determination modes of the first count parameter, for example, the first threshold corresponds to the first determination mode in step S304-1, and the second threshold corresponds to the second determination mode in step S304-1.

Exemplarily, the network device configures a first threshold (for example, the first sl-maxNumConsecutiveDTX) and a second threshold (for example, the second sl-maxNumConsecutiveDTX) for UE1, when the sidelink (for example, unicast connection) uses a non- When the spectrum is authorized for communication, the second sl-maxNumConsecutiveDTX is used for SL RLF detection; otherwise, the SL RLF detection is performed based on the first sl-maxNumConsecutiveDTX. Optionally, the second sl-maxNumConsecutiveDTX may also be a product of the first sl-maxNumConsecutiveDTX and a factor, for example, the factor takes a value greater than 1. Optionally, the network device can be configured through RRC dedicated signaling or system messages or pre-configuration messages. It is easy to understand that the above method of network device configuration threshold information can also be replaced by protocol pre-definition or writing into the chip.

It is easy to understand that this embodiment of the present application does not limit the way of determining the first count parameter in step S304-1 and the corresponding way of the threshold information in step S304-2, that is, in one possible way, in step S304-1 The second determination method is adopted, and the threshold information in step S304-2 includes multiple thresholds corresponding to different resource types. In another possible manner, the determination method 1 is adopted in step S304-1, and the threshold information in step S304-2 includes a single threshold, and the single threshold corresponds to different resource types.

Through the above method, when performing SL RLF detection, the influence of the resource type of transmission on whether the transmission is successful is considered, and the accuracy of SL RLF detection is improved. For example, considering the use of unlicensed spectrum for SL communication, UE2 needs to perform LBT on PSFCH resources after determining PSFCH resources, and PSFCH resources may be used by other operators or organizations in SL unlicensed spectrum communication scenarios, so the LBT of PSFCH resources may It fails, which causes UE1 to fail to receive the HARQ feedback from UE2, further causing unreasonable SL DTX counting on UE1 side, which may lead to SL RLF, and at this time the link quality between UE1 and UE2 may still be relatively good or The distance between the two is not too far. This method avoids unreasonable SL RFL and improves the quality of SL communication. In a possible implementation, by configuring different threshold information, for example, configure a larger threshold for unlicensed spectrum (because some SLDTX may be caused by LBT failure, not because the link is not good) to reduce misjudgment of SL RLF.

Next, please refer to FIG. 4 , which shows a schematic flowchart of a communication method provided by an embodiment of the present application. The embodiment shown in FIG. 4 is used alone or in combination with the embodiment shown in FIG. 2 .

UE2 sends data or indication information to UE1, where the indication information is used to indicate the reason for failing to send the PSFCH, and UE1 rolls back the first count parameter according to the data or indication information.

S401: UE1 sends a first message to UE2.

Correspondingly, UE2 receives the first message from UE1.

S402: (optional step) UE2 performs LBT on the feedback resources.

S403: (optional step) UE2 sends the first channel to UE1.

Wherein, for the specific implementation of S401-S403, reference may be made to relevant descriptions of S201-S203, which will not be repeated here.

S404: UE2 sends a second message to UE1, where the second message includes data or signaling.

Exemplarily, the second message includes first indication information and/or data information from UE2, the first indication information includes information indicating that the first channel has not been sent successfully, and the first channel is used to carry sidelink feedback information .

It can be understood that the first indication information may be carried in a PC5-RRC message, an SL media access control control element (media access control control element, MAC CE) or a physical layer message. Exemplarily, the physical layer message is SCI.

Optionally, the method further includes that UE2 determines the second message. It is easy to understand that this embodiment of the present application does not limit the way UE2 determines the second message, for example, UE2 can record the information related to the second message and send it to UE1 periodically, or UE2 receives the request message from UE1 Afterwards, the second message is sent to UE1.

Optionally, the information that the first channel has not been sent successfully includes the number of times that the first channel has not been sent successfully. Optionally, the information that the first channel is not sent successfully includes a reason why the first channel is not sent successfully, and the reason includes a channel access process failure of the first channel, or a low priority of the first channel. That is, the second message may include resource information and priority information, and for resource information and priority information, reference may be made to related descriptions in method 200 .

It is easy to understand that the embodiment of the present application does not limit the sequence of S404 and S405.

S405: UE1 performs sidelink quality detection.

Wherein, S405 includes the following steps:

S405-1: UE1 updates the first counting parameter according to the second message.

Wherein, the first counting parameter is used to indicate the number of consecutive discontinuous transmissions that occur in SL between UE1 and UE2. For the relevant description about the first counting parameter, reference may be made to the embodiment shown in FIG. 3 .

Optionally, updating the first count parameter by UE1 according to the second message includes: UE1 initializing the first count parameter to 0 according to the second message, or rolling back the first count parameter.

Optionally, rolling back the first count parameter includes subtracting 1 from the first count parameter, or subtracting the number of unsuccessful sending times indicated by the first indication information from the first count parameter.

It is easy to understand that the method 400 does not limit the manner in which the UE1 determines the first counting parameter. For example, the method 300 introduces a determining manner 1 and a determining manner 2 in which the UE1 determines the first counting parameter by way of example.

Of course, UE1 may update the first counting parameter according to the information of the manner of determining the first counting parameter and the second message.

For example, when UE1 determines the first counting parameter by using the determining manner introduced in method 300, UE1 may ignore the content of the second message, or in other words, UE1 may partially consider the content of the second message. For example, the content of the second message includes the number b of LBT failures and the number c of failures due to low priority. The value of the first calculation parameter determined by UE1 according to determination method 1 is a, and UE1 calculates the first count according to the second message The parameters are updated to a-b, where a is greater than or equal to b, and a, b, and c are integers.

S405-2: UE1 performs SL RLF detection according to the first count parameter.

It is easy to understand, for the relevant implementation of S405-2, refer to the relevant introduction of S304-2.

Through the above method, UE2 sends a second message to UE1 to indicate whether to roll back the first count parameter or to indicate the number of times to roll back the first count parameter, and UE1 updates the first count parameter according to the second message, which improves the accuracy of SL RLF detection . Avoid triggering unreasonable SL RLF and improve SL communication quality.

As shown in FIG. 5 , this embodiment of the present application introduces a flow chart of UE1 performing SL RLF detection. Exemplarily, when UE1 is used as a TX UE, UE1 detects multiple consecutive SLDTXs for a sidelink (for example, a unicast connection), that is, does not receive SL on the feedback resource for multiple consecutive times When feeding back information, the SL RLF of the unicast connection will be triggered. Optionally, UE1 is configured with threshold information to control SL RLF detection. For example, when UE1 detects that the number of consecutive SL DTXs meets the threshold information, UE1 will trigger SL RLF of the unicast connection.

UE1 maintains a first counting parameter for each unicast connection (PC5RRC connection) (the first counting parameter is numConsecutiveDTX as an example), which is used to count the number of consecutive DTXs that occur on the unicast connection.

UE1 (e.g., UE1's SL HARQ entity) performs for each reception opportunity (e.g., PSFCH reception opportunity):

S501: Initialize the numConsecutiveDTX variable of the unicast connection as 0.

It can be understood that when the unicast connection is established or the threshold information (for example, the threshold information is sl-maxNumConsecutiveDTX is introduced as an example) is (re)configured, UE1 (for example, the SL HARQ entity of UE1) will send each The numConsecutiveDTX of a unicast connection is initialized to 0:

Step S502 is executed after step S501.

S502: UE1 judges whether feedback information (for example, PSFCH or SL HARQ feedback) is received on a receiving opportunity.

If no feedback information is received on the receiver, go to S503. On the contrary, if feedback information is received on the receiver, execute S501.

S503: UE1 judges whether the resource corresponding to the feedback information is an unlicensed spectrum.

If the resource corresponding to the feedback information is an unlicensed spectrum, perform S505. On the contrary, if the resource corresponding to the feedback information is not an unlicensed spectrum, for example, the resource corresponding to the feedback information is a licensed spectrum, go to S504.

S504: Add 1 to numConsecutiveDTX.

Step S505 is executed after step S504.

S505: UE1 judges whether numConsecutiveDTX reaches sl-maxNumConsecutiveDTX.

If numConsecutiveDTX reaches sl-maxNumConsecutiveDTX, step S506 is executed. On the contrary, if numConsecutiveDTX does not reach sl-maxNumConsecutiveDTX, step 502 is executed. It can be understood that UE1 continues to judge whether to receive feedback information at the next receiving opportunity.

Optionally, in a possible manner, numConsecutiveDTX reaches sl-maxNumConsecutiveDTX, that is, numConsecutiveDTX is greater than or equal to sl-maxNumConsecutiveDTX. In yet another possible way, numConsecutiveDTX reaches sl-maxNumConsecutiveDTX when numConsecutiveDTX is greater than sl-maxNumConsecutiveDTX.

It should be noted that the names of network elements, interface names between network elements, information, and messages in the above-mentioned embodiments are just examples. In specific implementations, network elements, interface names, information, and messages between network elements can be Other names are not specifically limited in this embodiment of the present application.

The foregoing mainly introduces the solutions provided by the embodiments of the present application from the perspective of interaction between the first terminal and the second terminal. It can be understood that, in order to realize the above functions, the terminal may include corresponding hardware structures and/or software modules for performing various functions. Those skilled in the art should easily realize that the embodiments of the present application can be implemented in the form of hardware or a combination of hardware and computer software in combination with the units and algorithm steps of each example described in the embodiments disclosed herein. Whether a certain function is executed by hardware or computer software drives hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementation should not be considered as exceeding the scope of the present application.

The embodiment of the present application can divide the functional units of the terminal and the network device according to the above method example, for example, each functional unit can be divided corresponding to each function, or two or more functions can be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

Figure 6 shows a schematic diagram of the structure of a device. The apparatus 600 may be a network device or a terminal, a server or a centralized controller, and may also be a chip, a chip system, or a processor that supports the network device, terminal, server or centralized controller to implement the above method. The device can be used to implement the methods described in the above method embodiments, and for details, refer to the descriptions in the above method embodiments.

The apparatus 600 may include one or more processors 601, and the processors 601 may also be referred to as processing units, and may implement certain control functions. The processor 601 may be a general-purpose processor or a special-purpose processor. For example, it can be a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, and the central processing unit can be used to control communication devices (such as base stations, baseband chips, terminals, terminal chips, DU or CU, etc.), execute software programs, and process Data for Software Programs.

In an optional design, the processor 601 can also store instructions and/or data 603, and the instructions and/or data 603 can be executed by the processor, so that the device 600 executes the method described in the above-mentioned embodiment. described method.

In another optional design, the processor 601 may include a transceiver unit configured to implement receiving and sending functions. For example, the transceiver unit may be a transceiver circuit, or an interface, or an interface circuit, or a communication interface. The transceiver circuits, interfaces or interface circuits for realizing the functions of receiving and sending can be separated or integrated together. The above-mentioned transceiver circuit, interface or interface circuit may be used for reading and writing code/data, or the above-mentioned transceiver circuit, interface or interface circuit may be used for signal transmission or transmission.

In yet another possible design, the apparatus 600 may include a circuit, and the circuit may implement the function of sending or receiving or communicating in the foregoing method embodiments.

Optionally, the device 600 may include one or more memories 602, on which instructions 604 may be stored, and the instructions may be executed on the processor, so that the device 600 executes the above-mentioned method embodiments. described method. Optionally, data may also be stored in the memory. Optionally, instructions and/or data may also be stored in the processor. The processor and memory can be set separately or integrated together. For example, the corresponding relationships described in the foregoing method embodiments may be stored in a memory, or stored in a processor.

Optionally, the apparatus 600 may further include a transceiver 605 and/or an antenna 606 . The processor 601 may be called a processing unit, and controls the apparatus 600 . The transceiver 605 may be called a transceiver unit, a transceiver, a transceiver circuit, a transceiver device, or a transceiver module, etc., and is used to implement a transceiver function.

Optionally, the apparatus 600 in the embodiment of the present application may be used to execute the methods described in FIG. 2 to FIG. 5 in the embodiment of the present application.

The processors and transceivers described in this application can be implemented in integrated circuits (integrated circuits, ICs), analog ICs, radio frequency integrated circuits (RFICs), mixed-signal ICs, application specific integrated circuits (ASICs), printed circuit boards ( printed circuit board, PCB), electronic equipment, etc. The processor and transceiver can also be fabricated using various IC process technologies such as complementary metal oxide semiconductor (CMOS), nMetal-oxide-semiconductor (NMOS), P-type Metal oxide semiconductor (positive channel metal oxide semiconductor, PMOS), bipolar junction transistor (Bipolar Junction Transistor, BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

The devices described in the above embodiments may be network devices or terminals, but the scope of the devices described in this application is not limited thereto, and the structure of the devices may not be limited by FIG. 6 . A device may be a stand-alone device or may be part of a larger device. For example the device may be:

(1) Stand-alone integrated circuits ICs, or chips, or chip systems or subsystems;

(2) A set of one or more ICs, optionally, the set of ICs may also include a storage unit for storing data and/or instructions;

(3) ASIC, such as modem (MSM);

(4) Modules that can be embedded in other devices;

(5) Receivers, terminals, smart terminals, cellular phones, wireless devices, handsets, mobile units, vehicle-mounted devices, network devices, cloud devices, artificial intelligence devices, machine devices, household devices, medical devices, industrial devices, etc.;

(6) Others and so on.

FIG. 7 provides a schematic structural diagram of a terminal. The terminal is applicable to the scenario shown in FIG. 1 . For ease of description, FIG. 7 only shows main components of the terminal. As shown in FIG. 7 , the terminal 700 includes a processor, a memory, a control circuit, an antenna, and an input and output device. The processor is mainly used to process communication protocols and communication data, control the entire terminal, execute software programs, and process data of the software programs. Memory is primarily used to store software programs and data. The radio frequency circuit is mainly used for the conversion of the baseband signal and the radio frequency signal and the processing of the radio frequency signal. Antennas are mainly used to send and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users.

When the terminal is turned on, the processor can read the software program in the storage unit, analyze and execute the instructions of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor performs baseband processing on the data to be sent, and then outputs the baseband signal to the radio frequency circuit. The radio frequency circuit processes the baseband signal to obtain a radio frequency signal and sends the radio frequency signal through the antenna in the form of electromagnetic waves. . When data is sent to the terminal, the radio frequency circuit receives the radio frequency signal through the antenna, the radio frequency signal is further converted into a baseband signal, and the baseband signal is output to the processor, and the processor converts the baseband signal into data and processes the data .

For ease of illustration, FIG. 7 shows only one memory and processor. In an actual terminal, there may be multiple processors and memories. A storage may also be called a storage medium or a storage device, which is not limited in this embodiment of the present invention.

As an optional implementation, the processor may include a baseband processor and a central processing unit. The baseband processor is mainly used to process communication protocols and communication data. The central processor is mainly used to control the entire terminal and execute software. Programs, which process data for software programs. The processor in FIG. 7 integrates the functions of the baseband processor and the central processing unit. Those skilled in the art can understand that the baseband processor and the central processing unit can also be independent processors, interconnected through technologies such as a bus. Those skilled in the art can understand that the terminal may include multiple baseband processors to adapt to different network standards, the terminal may include multiple central processors to enhance its processing capability, and various components of the terminal may be connected through various buses. The baseband processor may also be expressed as a baseband processing circuit or a baseband processing chip. The central processing unit may also be expressed as a central processing circuit or a central processing chip. The function of processing the communication protocol and communication data can be built in the processor, or can be stored in the storage unit in the form of a software program, and the processor executes the software program to realize the baseband processing function.

In one example, the antenna and the control circuit with the transceiver function may be regarded as the transceiver unit 711 of the terminal 700 , and the processor with the processing function may be regarded as the processing unit 712 of the terminal 700 . As shown in FIG. 7 , the terminal 700 includes a transceiver unit 711 and a processing unit 712 . The transceiver unit may also be referred to as a transceiver, a transceiver, a transceiver device, and the like. Optionally, the device in the transceiver unit 711 for realizing the receiving function can be regarded as a receiving unit, and the device in the transceiver unit 711 for realizing the sending function can be regarded as a sending unit, that is, the transceiver unit 711 includes a receiving unit and a sending unit. Exemplarily, the receiving unit may also be called a receiver, receiver, receiving circuit, etc., and the sending unit may be called a transmitter, transmitter, or transmitting circuit, etc. Optionally, the above-mentioned receiving unit and sending unit may be one integrated unit, or may be multiple independent units. The above-mentioned receiving unit and sending unit may be located in one geographic location, or may be dispersed in multiple geographic locations.

As shown in FIG. 8 , another embodiment of the present application provides an apparatus 800 . The device may be a terminal or a network device, or a component of the terminal or network device (for example, an integrated circuit, a chip, etc.). The device may also be another communication module, which is used to implement the method in the method embodiment of the present application. The apparatus 800 may include: a processing module 802 (or referred to as a processing unit). Optionally, a transceiver module 801 (or called a transceiver unit or a communication interface) and a storage module 803 (or called a storage unit) may also be included.

In a possible design, one or more modules in Figure 8 may be implemented by one or more processors, or by one or more processors and memories; or by one or more processors and a transceiver; or by one or more processors, memories, and a transceiver, which is not limited in this embodiment of the present application. The processor, memory, and transceiver can be set independently or integrated.

The device has the function of implementing the terminal described in the embodiment of this application. For example, the device includes a module or unit or means (means) corresponding to the terminal performing the steps related to the terminal described in the embodiment of this application. The function or unit or The means (means) can be implemented by software, or by hardware, or by executing corresponding software by hardware, or by a combination of software and hardware. Alternatively, the device has the function of implementing the network device described in the embodiment of the present application, for example, the device includes a module or unit or means (means) corresponding to the network device performing the steps involved in the network device described in the embodiment of the present application , the function or unit or means (means) may be implemented by software, or by hardware, or by executing corresponding software by hardware, or by a combination of software and hardware. For details, further reference may be made to the corresponding descriptions in the aforementioned corresponding method embodiments.

Optionally, each module in the apparatus 800 in the embodiment of the present application may be used to execute the methods described in FIG. 2 to FIG. 5 in the embodiment of the present application.

Specifically, in one embodiment, the transceiver unit 801 is configured to: send a first message to the second terminal, where the first message includes signaling and/or data; the processing unit 802 is configured to determining a first count parameter, where the first count parameter is used to indicate the number of consecutive and discontinuous transmissions that occur on the sidelink link between the apparatus and the second terminal, where the first count parameter is used to detect the The quality of the sidelink; wherein, the first information includes information on whether the device receives a first channel on a receiver, and the first channel is used to carry sidelink feedback information; the second The information includes resource information corresponding to the first channel, and the resource information includes whether the resource corresponding to the first channel is a licensed spectrum or an unlicensed spectrum.

Optionally, the processing unit 802 is further configured to determine whether a sidelink radio link failure occurs or not occurs according to the first count parameter.

Optionally, the transceiving unit 801 is further configured to receive feedback information from the second terminal in response to the first message.

Specifically, in another embodiment, the transceiver unit 801 is configured to: send a first message to the second terminal, where the first message includes signaling and/or data; the transceiver unit 801 is also configured to receive a message from the the second message of the second terminal;

The processing unit 802 is configured to update a first count parameter according to the second message, where the first count parameter is used to indicate the number of consecutive and discontinuous transmissions that occur in SL between the apparatus and the second terminal; wherein, The second message includes first indication information and/or data information from the second terminal, the first indication information includes information indicating that the first channel has not been sent successfully, and the first channel is used to bear Sidelink feedback information.

Optionally, the processing unit 802 is further configured to determine whether a sidelink radio link failure occurs or not according to the first count parameter and threshold information.

Specifically, in another embodiment, the transceiver unit 801 is configured to receive a first message from a first terminal, where the first message includes signaling and/or data;

The transceiver unit 801 is further configured to send a second message to the first terminal, where the second message includes first indication information and/or data information, and the first indication information includes information indicating that the first channel does not have Sending success information, the first channel is used to carry sidelink feedback information.

Optionally, the first channel is used to respond to the first message.

Optionally, the processing unit 802 is configured to determine the second message.

Those skilled in the art can understand that, for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

It can be understood that, in some scenarios, some optional features in the embodiments of the present application may be implemented independently without depending on other features, such as the current solution on which they are based, to solve corresponding technical problems and achieve corresponding The effect can also be combined with other features according to requirements in some scenarios. Correspondingly, the devices provided in the embodiments of the present application can also correspondingly implement these features or functions, which will not be repeated here.

Those skilled in the art can also understand that various illustrative logical blocks and steps listed in the embodiments of the present application can be implemented by electronic hardware, computer software, or a combination of both. Whether such functions are implemented by hardware or software depends on the specific application and overall system design requirements. For corresponding applications, those skilled in the art can use various methods to implement the described functions, but such implementation should not be understood as exceeding the protection scope of the embodiments of the present application.

It can be understood that the processor in the embodiment of the present application may be an integrated circuit chip having a signal processing capability. In the implementation process, each step of the above-mentioned method embodiments may be completed by an integrated logic circuit of hardware in a processor or instructions in the form of software. The above-mentioned processor can be a general-purpose processor, a digital signal processor (digital signal processor, DSP), an application specific integrated circuit (application specific integrated circuit, ASIC), a field programmable gate array (field programmable gate array, FPGA) or other possible Program logic devices, discrete gate or transistor logic devices, discrete hardware components.

It can be understood that the memory in the embodiments of the present application may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memories. Among them, the non-volatile memory can be read-only memory (read-only memory, ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrically programmable Erases programmable read-only memory (electrically EPROM, EEPROM) or flash memory. Volatile memory can be random access memory (RAM), which acts as external cache memory. By way of illustration and not limitation, many forms of RAM are available such as 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, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (synchlink DRAM, SLDRAM ) and direct memory bus random access memory (direct rambus RAM, DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but not be limited to, these and any other suitable types of memory.

The present application also provides a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a computer, the functions of any one of the above method embodiments are realized.

The present application also provides a computer program product, the computer product includes a computer program (also called code, or instruction), and when the computer program product is executed by a computer, the functions of any one of the above method embodiments are realized.

In the above embodiments, all or part of them may be implemented by software, hardware, firmware or any combination thereof. When implemented using software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Transmission to another website site, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center integrated with one or more available media. The available medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a high-density digital video disc (digital video disc, DVD)), or a semiconductor medium (for example, a solid state disk (solid state disk, SSD)) etc.

It is to be understood that references to "an embodiment" throughout the specification mean that a particular feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present application. Thus, the various embodiments throughout the specification are not necessarily referring to the same embodiment. Furthermore, the particular features, structures or characteristics may be combined in any suitable manner in one or more embodiments. It can be understood that in various embodiments of the present application, the size of the sequence numbers of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its functions and internal logic, and should not be used in the embodiments of the present application. The implementation process constitutes any limitation. It can be understood that in this application, "when", "if" and "if" all mean that the device will make corresponding processing under certain objective circumstances, and it is not a time limit, and it is not required that the device implements a certain The act of judgment does not mean that there are other restrictions.

It can be understood that in each embodiment of the present application, "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B according to A does not mean determining B only according to A, and B may also be determined according to A and/or other information.

Predefinition in this application can be understood as definition, predefinition, storage, prestorage, prenegotiation, preconfiguration, curing, or prefiring.

It can be understood that the systems, devices and methods described in this application can also be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.

If the functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disk or optical disc and other media that can store program codes. .

The same or similar parts among the various embodiments in this application can be referred to each other. In the various embodiments in this application, and the various implementation methods/implementation methods/implementation methods in each embodiment, if there is no special description and logical conflict, different embodiments, and each implementation method/implementation method in each embodiment The terms and/or descriptions between implementation methods/implementation methods are consistent and can be referred to each other. Different embodiments, and the technical features in each implementation manner/implementation method/implementation method in each embodiment are based on their inherent Logical relationships can be combined to form new embodiments, implementation modes, implementation methods, or implementation methods. The embodiments of the present application described above are not intended to limit the scope of protection of the present application.

The above is only a specific implementation of the application, but the scope of protection of the application is not limited thereto. Anyone familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the application. Should be covered within the protection scope of this application.

Claims (43)

A communication method, characterized in that, comprising: the first terminal sends a first message to the second terminal, where the first message includes signaling and/or data; The first terminal determines a first counting parameter according to the first information and the second information, and the first counting parameter is used to indicate that the sidelink link between the first terminal and the second terminal is continuous or non-continuous The number of times sent, the first count parameter is used to detect the quality of the sidelink; Wherein, the first information includes information about whether the first terminal receives a first channel on a receiving opportunity, and the first channel is used to carry sidelink feedback information; the second information includes the first channel Resource information corresponding to a channel, where the resource information includes whether the resource corresponding to the first channel is a licensed spectrum or an unlicensed spectrum. The method according to claim 1, wherein the first count parameter used to detect the quality of the sidelink comprises: The first terminal determines whether sidelink radio link failure occurs or does not occur according to the first count parameter and threshold information. The method according to claim 1 or 2, wherein said determining the first count parameter comprises adding 1 to the value of the first count parameter, or not adding 1 to the value of the first count parameter, Or, initialize the first count parameter to 0. The method according to any one of claims 1 to 3, wherein the first terminal determining the first counting parameter according to the first information and the second information includes: The first terminal determines to add 1 to the value of the first count parameter for the licensed spectrum according to not receiving the first channel on the receiving opportunity and the resources corresponding to the first channel; or, The first terminal determines not to add 1 to the value of the first count parameter for the unlicensed spectrum according to not receiving the first channel on the receiving opportunity and the resources corresponding to the first channel; or, The first terminal determines to initialize the first count parameter to 0 for the unlicensed spectrum according to receiving the first channel and the resource corresponding to the first channel on the receiving opportunity. The method according to any one of claims 1 to 4, wherein the first parameter of the resource pool corresponding to the unlicensed spectrum carrier satisfies a first condition, and the first condition is greater than or equal to a first threshold, or, Belonging to the first list, or belonging to the first range, the first parameter includes a resource quality parameter or a signal quality parameter. The method according to any one of claims 1 to 5, wherein the determining by the first terminal that a sidelink radio link failure occurs or not occurs according to the first count parameter and threshold information includes: The first terminal determines that the sidelink radio link failure occurs according to the first count parameter being greater than or equal to the threshold information; or, The first terminal determines that the sidelink radio link failure does not occur according to information that the first count parameter is smaller than the threshold. The method according to any one of claims 1 to 6, wherein the threshold information includes a first threshold and/or a second threshold, wherein the first threshold corresponds to the licensed spectrum used by the SL For communication, the second threshold corresponds to that the SL uses an unlicensed spectrum for communication. The method of claim 7, wherein the second threshold is greater than the first threshold. The method according to any one of claims 1 to 8, wherein the threshold information is configured by a network device, or is predefined or preconfigured. A communication method, characterized in that, comprising: the first terminal sends a first message to the second terminal, where the first message includes signaling and/or data; the first terminal receives a second message from the second terminal; The first terminal updates a first counting parameter according to the second message, and the first counting parameter is used to indicate the number of consecutive and non-sequential transmissions that occur in SL between the first terminal and the second terminal; Wherein, the second message includes first indication information and/or data information from the second terminal, the first indication information includes information indicating that the first channel has not been sent successfully, and the first channel uses To carry sidelink feedback information. The method according to claim 10, characterized in that the method further comprises: The first terminal determines whether sidelink radio link failure occurs or does not occur according to the first count parameter and threshold information. The method according to claim 10 or 11, characterized in that the information that the first channel has not been successfully sent includes the number of times that the first channel has not been successfully sent. The method according to any one of claims 10 to 12, wherein the information that the first channel is not sent successfully includes the reason why the first channel is not sent successfully, and the reason includes the information of the first channel The channel access process fails, or the priority of the first channel is low. The method according to any one of claims 10 to 13, wherein updating the first counting parameter by the first terminal according to the second message includes: The first terminal initializes the first count parameter to 0 according to the second message, or rolls back the first count parameter. The method according to claim 14, wherein said rolling back said first count parameter comprises: Subtracting 1 from the first counting parameter, or subtracting the number of failed transmissions indicated by the first indication information from the first counting parameter. A communication method, characterized in that, comprising: the second terminal receives a first message from the first terminal, where the first message includes signaling and/or data; The second terminal sends a second message to the first terminal, the second message includes first indication information and/or data information, and the first indication information includes information indicating that the first channel has not been sent successfully , the first channel is used to carry sidelink feedback information. The method according to claim 16, further comprising: The second terminal determines the second message. The method according to claim 16 or 17, wherein the method further comprises: The second terminal determines a feedback resource, where the feedback resource is used to send the feedback information. The method according to claim 18, wherein the second terminal performs LBT on the feedback resources. A communication device, characterized by comprising: a transceiver unit, configured to send a first message to a second terminal, where the first message includes signaling and/or data; A processing unit, configured to determine a first counting parameter according to the first information and the second information, where the first counting parameter is used to indicate the number of continuous and discontinuous transmissions that occur on the sidelink link between the device and the second terminal times, the first count parameter is used to detect the quality of the sidelink; Wherein, the first information includes information on whether the device receives a first channel on a receiver, and the first channel is used to carry sidelink feedback information; the second information includes the first channel Corresponding resource information, the resource information includes whether the resource corresponding to the first channel is a licensed spectrum or an unlicensed spectrum. The device according to claim 20, wherein the processing unit is further configured to determine whether a sidelink radio link failure occurs or not according to the first count parameter and threshold information. The device according to claim 20 or 21, wherein the processing unit is specifically used for: Determining the first count parameter includes adding 1 to the value of the first count parameter, or not adding 1 to the value of the first count parameter, or initializing the first count parameter to 0. The device according to any one of claims 20-22, wherein the processing unit determines the first counting parameter according to the first information and the second information, and is specifically used for: Determine to add 1 to the value of the first count parameter for the licensed spectrum according to not receiving the first channel and the resources corresponding to the first channel on the receiver; or, Determine not to add 1 to the value of the first count parameter for the unlicensed spectrum according to not receiving the first channel and the resource corresponding to the first channel on the receiver; or, Determining and initializing the first count parameter to 0 for an unlicensed spectrum according to receiving the first channel on the receiver and the resources corresponding to the first channel. The device according to any one of claims 20-23, wherein the first parameter of the resource pool corresponding to the unlicensed spectrum carrier satisfies a first condition, and the first condition is greater than or equal to a first threshold, or, Belonging to the first list, or belonging to the first range, the first parameter includes a resource quality parameter or a signal quality parameter. The device according to any one of claims 20-24, wherein the processing unit determines whether a sidelink radio link failure occurs or not according to the first count parameter and threshold information, and is specifically used for: determining that the sidelink radio link failure occurs according to the first count parameter being greater than or equal to the threshold information; or, Determining that the sidelink radio link failure does not occur according to the first count parameter being less than the threshold information. The device according to any one of claims 20-25, wherein the threshold information includes a first threshold and/or a second threshold, wherein the first threshold corresponds to the licensed spectrum used by the SL For communication, the second threshold corresponds to that the SL uses an unlicensed spectrum for communication. The apparatus of claim 26, wherein the second threshold is greater than the first threshold. The apparatus according to any one of claims 20-27, wherein the threshold information is configured by a network device, or is predefined or preconfigured. A communication device, characterized by comprising: a transceiver unit, configured to send a first message to a second terminal, where the first message includes signaling and/or data; The transceiving unit is further configured to receive a second message from the second terminal; A processing unit, configured to update a first counting parameter according to the second message, where the first counting parameter is used to indicate the number of consecutive and discontinuous transmissions that occur in SL between the device and the second terminal; Wherein, the second message includes first indication information and/or data information from the second terminal, the first indication information includes information indicating that the first channel has not been sent successfully, and the first channel uses To carry sidelink feedback information. The device according to claim 29, wherein the processing unit is further configured to determine whether sidelink radio link failure occurs or not occurs according to the first count parameter and threshold information. The device according to claim 29 or 30, characterized in that, the information that the first channel has not been successfully sent includes the number of times that the first channel has not been successfully sent. The device according to any one of claims 29-31, wherein the information that the first channel is not successfully sent includes the reason why the first channel is not sent successfully, and the reason includes the information of the first channel The channel access process fails, or the priority of the first channel is low. The device according to any one of claims 29-32, wherein the processing unit updates the first count parameter according to the second message, and is specifically configured to: Initialize the first count parameter to 0 according to the second message, or roll back the first count parameter. The device according to claim 33, wherein the processing unit rolls back the first count parameter, and is specifically used for: Subtracting 1 from the first counting parameter, or subtracting the number of failed transmissions indicated by the first indication information from the first counting parameter. A communication device, characterized by comprising: a transceiver unit, configured to receive a first message from a first terminal, where the first message includes signaling and/or data; The transceiver unit is further configured to send a second message to the first terminal, the second message includes first indication information and/or data information, and the first indication information includes information indicating that the first channel is not sent For successful information, the first channel is used to carry sidelink feedback information. The device according to claim 35, further comprising: A processing unit, configured to determine the second message. The device according to claim 35 or 36, wherein the processing unit is further configured to determine a feedback resource, and the feedback resource is used to send the feedback information. The device according to claim 37, wherein the processing unit is further configured to perform LBT on the feedback resources. A communication device, characterized in that it includes: a processor, the processor is coupled with a memory, and the memory is used to store a program or an instruction, and when the program or instruction is executed by the processor, the device Execute the method according to any one of claims 1 to 9, or any one of claims 10 to 15, or any one of claims 16 to 19. A computer-readable storage medium, on which computer programs or instructions are stored, characterized in that, when the computer program or instructions are executed, the computer executes any one of claims 1 to 9, or, as claimed in claims 10 to 9 15, or a method as claimed in any one of claims 16 to 19. A computer program product comprising instructions which, when executed, causes any one of claims 1 to 9, or any one of claims 10 to 15, or any one of claims 16 to 19 method is executed. A chip system, characterized in that it includes at least one processor, a memory and an interface circuit, the memory, the interface circuit and the at least one processor are interconnected through lines, and instructions are stored in the at least one memory; When the instructions are executed by the processor, the first terminal executes the method according to any one of claims 1 to 15, or realizes the second terminal executes the method according to any one of claims 16 to 19 . A communication system, characterized by comprising a first terminal and a second terminal, the first terminal is used to perform the method according to any one of claims 1 to 15, and the second terminal is used to perform the method as described in A method as claimed in any one of claims 16 to 19.

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