CN116264676A

CN116264676A - Communication method, device and system

Info

Publication number: CN116264676A
Application number: CN202111521812.7A
Authority: CN
Inventors: 李翔宇; 彭文杰
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-12-13
Filing date: 2021-12-13
Publication date: 2023-06-16
Also published as: WO2023109777A1

Abstract

The embodiment of the application provides a communication method, a communication device and a communication system. The method comprises the following steps: the method comprises the steps that a first terminal sends side uplink control information to a second terminal, the first terminal determines a first counting parameter according to first information and second information, the first counting parameter is used for indicating the times of continuous discontinuous transmission of unicast connection between the first terminal and the second terminal, the first information comprises information of whether the first terminal receives a first channel on a receiving opportunity or not, and the first channel is used for bearing side uplink feedback information; the second information includes resource information corresponding to the first channel, and the resource information includes that resources corresponding to the first channel are authorized spectrum or unlicensed spectrum. By adopting the method, the second information can be referred to when the first counting parameter is determined, so that the first counting parameter is more accurately determined, and the quality of sidestream communication is improved.

Description

Communication method, device and system

Technical Field

The embodiment of the application relates to the technical field of communication, in particular to a communication method, a device and a system.

Background

In a wireless communication system, data communication between terminals may be performed by a network device, or communication between terminals may be performed directly without the network device. A wireless communication interface (e.g., PC5 interface) between terminals, and an air interface (e.g., uu interface) between terminals and radio access network equipment (e.g., base stations). The link between terminals may also be referred to as a sidelink (sidelink), a typical application scenario for sidelink communication, i.e. internet of vehicles (vehicle to everything, V2X). In the Internet of vehicles, each vehicle is a terminal, and data transmission can be directly carried out between vehicles through a sidelink without passing through network equipment, so that communication time delay is effectively reduced.

How to accurately detect the side-link quality is a problem that needs to be addressed.

Disclosure of Invention

The embodiment of the application provides a communication method, a device and a system, which are used for improving the accuracy of communication quality detection of a side uplink.

In a first aspect, embodiments of the present application provide a communication method, which may be performed by a terminal, or may be performed by a component (e.g., a processor, a chip, or a chip system, etc.) of the terminal, including: the method comprises the steps that a first terminal sends a first message to a second terminal, wherein the first message comprises signaling and/or data; the first terminal determines a first counting parameter according to first information and second information, wherein the first counting parameter is used for indicating the times of continuous discontinuous transmission of a side uplink between the first terminal and the second terminal, and the first counting parameter is used for detecting the quality of the side uplink; the first information comprises information whether the first terminal receives a first channel on a receiving opportunity, wherein the first channel is used for bearing side uplink feedback information; the second information includes resource information corresponding to the first channel, where the resource information includes that resources corresponding to the first channel are licensed spectrum or unlicensed spectrum. In the scheme, the first counting parameter is determined according to the first information and the second information and used for detecting the quality of the side uplink, so that the detection accuracy is improved.

In a possible manner, the first counting parameter is used to detect the quality of the side link, including: and the first terminal determines that the side-link wireless link failure occurs or does not occur according to the first counting parameter. In this manner, SL RLF detection is performed based on the first count parameter, which is used to measure SL link quality.

Optionally, the determining, by the first terminal, that the side-link radio link failure occurs or does not occur according to the first count parameter includes: and the first terminal determines whether the side-link wireless link failure occurs or not according to the first counting parameter and the threshold information.

In a possible manner, the determining the first count parameter includes adding 1 to the value of the first count parameter, or adding no 1 to the value of the first count parameter, or initializing the first count parameter to 0.

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

the first terminal determines that the value of the first counting parameter is increased by 1 according to the fact that the first channel and the resources corresponding to the first channel are not received on the receiver and the authorized spectrum; or alternatively, the process may be performed,

The first terminal determines that the value of the first counting parameter is not increased by 1 according to the first channel which is not received on the receiver and the resource corresponding to the first channel is unlicensed spectrum; or alternatively, the process may be performed,

the first terminal initializes the first counting parameter to 0 according to the first channel received on the receiver and the unlicensed spectrum determined by the resources corresponding to the first channel; or alternatively, the process may be performed,

the first terminal initializes the first count parameter to 0 based on receiving the first channel determination at the receiver opportunity.

By the method, the first counting parameter is determined according to whether the first channel and the resource information corresponding to the first channel are received on the receiver or not, so that the accuracy of counting the first counting parameter is improved.

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

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

Optionally, the determining, by the first terminal, that the side-link radio link failure occurs or does not occur according to the first count parameter and the threshold information includes: the first terminal determines that the side uplink wireless link failure occurs according to the fact that the first counting parameter is greater than or equal to the threshold information; or the first terminal determines that the side-link wireless link failure does not occur according to the fact that the first counting parameter is smaller 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 licensed spectrum communications and the second threshold corresponds to the SL using unlicensed spectrum communications. Optionally, the second threshold is greater than the first threshold. Optionally, the threshold information is configured by the network device, or predefined or preconfigured. By the method, different thresholds are set, the accuracy of SL link detection is improved, and the SL communication quality is enhanced.

In a second aspect, embodiments of the present application provide a communication method, which may be performed by a terminal, or may be performed by a component (e.g., a processor, a chip, or a chip system, etc.) of the terminal, including: the method comprises the steps that a first terminal sends a first message to a second terminal, wherein the first message comprises 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, wherein the first counting parameter is used for indicating the times of continuous discontinuous transmission (SL) between the first terminal and the second terminal; the second message includes first indication information and/or data information from the second terminal, the first indication information includes information for indicating that a first channel is not successful in transmission, and the first channel is used for carrying side uplink feedback information. According to the scheme, 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 that a side-link 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 the side-link radio link failure occurs or does not occur according to the first count parameter includes: and the first terminal determines whether the side-link wireless link failure occurs or not according to the first counting parameter and the threshold information. In this manner, SL RLF detection is performed based on the first count parameter, which is used to measure SL link quality.

Optionally, the information that the first channel is not successful in transmission includes the number of times that the first channel is not successful in transmission. Optionally, the information that the first channel is not successfully transmitted includes a reason that the first channel is not successfully transmitted, where the reason includes that a channel access procedure of the first channel fails, or that a priority of the first channel is low.

In a possible manner, the first terminal updating the first count parameter according to the second message includes: and initializing the first counting parameter to 0 by the first terminal according to the second message, or backing the first counting parameter.

Optionally, the rollback the first count parameter includes: subtracting 1 from the first count parameter, or subtracting the number of times of unsuccessful transmission indicated by the first indication information from the first count parameter.

By the method, the first terminal backs the first counting parameter according to the indication of the second terminal, so that unreasonable counting times are reduced, counting accuracy is improved, and unreasonable radio link failure triggering is avoided.

In a third aspect, embodiments of the present application provide a communication method, which may be performed by a terminal, or may be performed by a component (e.g., a processor, a chip, or a chip system, etc.) of the terminal, including: the second terminal receives a first message from the first terminal, wherein the first message comprises signaling and/or data; the second terminal sends a second message to the first terminal, wherein the second message comprises first indication information and/or data information, the first indication information comprises information for indicating that a first channel is not successful in sending, and the first channel is used for bearing side uplink feedback information. According to the scheme, the second terminal sends the message to the first terminal to assist the first terminal in carrying out link quality detection, and accuracy of the link quality detection is improved.

Optionally, the first channel is used for responding 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 listens 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 way, the second terminal transmits indication information for the first terminal to determine whether to backoff the first count parameter.

In a fourth aspect, embodiments of the present application provide a communication device, which may be a first terminal, and may also be a chip for the first terminal. The apparatus has the function of implementing the above-mentioned first aspect, or the second aspect, or each possible implementation method of the first aspect, or each possible implementation method of the second aspect. The functions can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In one possible design, the device has the function of implementing the first aspect, or each possible implementation method of the first aspect. In one possible design, the apparatus may include a transceiver unit and a processing unit. Illustratively:

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 count parameter according to first information and second information, where the first count parameter is used to indicate a number of times of continuous discontinuous transmission that occurs in a side link between the apparatus and the second terminal, and the first count parameter is used to detect quality of the side link; wherein the first information includes information whether the device receives a first channel on a receiver, the first channel being used to carry side uplink feedback information; the second information includes resource information corresponding to the first channel, where the resource information includes that resources corresponding to the first channel are licensed spectrum or unlicensed spectrum.

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

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

In one possible design, the device has the function of implementing the second aspect or each possible implementation method of the second aspect. In one possible design, the apparatus may include a transceiver unit and a processing unit. Illustratively:

the receiving and transmitting unit is further used for receiving a second message from the second terminal;

the processing unit is used for updating a first counting parameter according to the second message, wherein the first counting parameter is used for indicating the number of times of continuous discontinuous transmission (SL) between the device and the second terminal; the second message includes first indication information and/or data information from the second terminal, the first indication information includes information for indicating that a first channel is not successful in transmission, and the first channel is used for carrying side uplink feedback information.

Optionally, the processing unit is further configured to determine that a side-link radio link failure occurs or does not occur according to the first count parameter and threshold information.

In a fifth aspect, embodiments of the present application provide a communication device, which may be a second terminal, and may also be a chip for the second terminal. The apparatus has the function of implementing the third aspect described above, or each possible implementation method of the third aspect. The functions can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In one possible design, the apparatus has a function of implementing the third aspect, or each possible implementation method of the third aspect. In one possible design, the apparatus may include a transceiver unit and a processing unit. Illustratively:

a transceiver unit for receiving a first message from a first terminal, the first message comprising signaling and/or data;

the transceiver unit is further configured to send 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 for indicating that the first channel is not successful in sending, and the first channel is used to carry side uplink feedback information.

Optionally, the first channel is used for responding to the first message.

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

It is to be readily understood that the descriptions of the fourth and fifth aspects are merely examples, and reference may be made to the relevant descriptions of the corresponding method aspects (e.g., the first to third aspects) for the avoidance of redundant description.

In a sixth aspect, embodiments of the present application provide a communication device comprising a processor coupled to a memory; the memory is configured to store a program or instructions which, when executed by the apparatus, cause the apparatus to perform any of the methods described above in the first to third aspects, each of the possible implementation methods of the first to third aspects.

In a seventh aspect, embodiments of the present application provide a communications device, including a unit or means (means) for performing the methods of the first aspect to the third aspect, and each step of any of the possible implementation methods of the first aspect to the third aspect.

In an eighth aspect, embodiments of the present application provide a communication device, including a processor and an interface circuit, where the processor is configured to communicate with other devices through the interface circuit and perform any of the methods of the first aspect to the third aspect, and each possible implementation method of the first aspect to the third aspect. The processor includes one or more.

In a ninth aspect, an embodiment of the present application provides a communications device, including a processor, configured to be connected to a memory, and configured to invoke a program stored in the memory, to perform any of the methods of the first aspect to the third aspect, and possible implementation methods of the first aspect to the third aspect. The memory may be located within the device or may be located external to the device. And the processor includes one or more.

In a tenth aspect, embodiments of the present application further provide a computer readable storage medium having instructions stored therein, which when run on a computer, cause a processor to perform the methods of the first to third aspects described above, any of the possible implementation methods of the first to third aspects.

In an eleventh aspect, embodiments of the present application further provide a computer program product comprising a computer program which, when run, causes the method of the first to third aspects described above, any of the possible implementation methods of the first to third aspects to be performed.

In a twelfth aspect, embodiments of the present application further provide a chip system, including: a processor for performing the methods of the first to third aspects described above, any of the possible implementation methods of the first to third aspects.

In a thirteenth aspect, embodiments of the present application further provide a communication system, including: a first terminal as in any of the possible manners of the first or second aspect and a second terminal as in any of the possible manners of the third aspect.

Optionally, the communication system may further comprise a network device.

The technical effects of any implementation manner of the fourth aspect to the thirteenth aspect may refer to the technical effects of any possible design of the data transmission method in any of the foregoing aspects, which are not repeated.

Drawings

Fig. 1A is a schematic diagram of a relationship between PSSCH and PSFCH according to an embodiment of the present application;

Fig. 1B is a schematic diagram of PSFCH transmission in unlicensed spectrum communication according to an embodiment of the present application;

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

fig. 2 is a schematic diagram of a communication method according to an embodiment of the present application;

FIG. 3 is a schematic diagram of another communication method according to an embodiment of the present application;

FIG. 4 is a schematic diagram of another communication method according to an embodiment of the present application;

FIG. 5 is a schematic diagram of another communication method according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a terminal according to an embodiment of the present application;

fig. 8 is a schematic diagram of another communication device according to an embodiment of the present application.

Detailed Description

For ease of understanding the embodiments of the present application, some terms or concepts related to the embodiments of the present application are briefly described.

In a wireless communication system, data communication between terminals may be performed by a network device, or communication between terminals may be performed without the network device. The wireless interface between terminals (e.g., PC5 interface) is similar to the wireless interface between terminals and network devices (e.g., uu interface).

The link between terminals may be referred to as a sidelink, or a PC5 interface link, or an inter-terminal link. One or more of broadcast, unicast, and multicast communications are typically supported on the sidelink (sidelink). One typical application scenario for sidelink communication is the Internet of vehicles (V2X). In the Internet of vehicles, each vehicle is a terminal, and data transmission can be directly carried out between vehicles through a sidelink without passing through network equipment, so that communication time delay can be effectively reduced.

Broadcast communication is similar to network devices (e.g., base stations) broadcasting system information, i.e., terminals do not encrypt data for externally transmitting broadcast services, and any other terminal within the effective reception range can receive the broadcast service data if interested in the broadcast service.

Unicast communication is similar to data communication performed after a radio resource control (radio resource control, RRC) connection is established between terminals and a base station, requiring prior establishment of a unicast connection between terminals. After the unicast connection is established, the terminal may communicate data based on the negotiated identity, and the data may or may not be encrypted. In unicast communication, unicast communication is generally performed between terminals that establish unicast connection, as compared with broadcast communication. In one possible implementation, in unicast communication, a terminal may send a source identifier and a destination identifier with data when sending the data, where the source identifier is typically assigned by a sending user equipment (transmission user equipment, TX UE), the destination identifier is typically assigned by a receiving user equipment (reception user equipment, RX UE) for the unicast connection, where TX UE refers to a terminal sending data or signaling, and RX UE refers to a terminal receiving data or signaling from TX UE.

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

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

In unicast communication, the destination address may be used to identify a receiving terminal; in multicast communications, a destination address may be used to identify a group; in broadcast communications, a destination address may be used to identify a service. It will be appreciated that the destination address may be a destination layer 2 identification (destination L2 ID). In other words, the destination layer 2 identifier is an example of a destination address.

A terminal may use communication with a network device, where the spectrum resources may include licensed spectrum resources (which may be referred to simply as licensed spectrum) and unlicensed spectrum resources (which may be referred to simply as unlicensed spectrum).

Licensed spectrum generally refers to spectrum that is made available to some organizations or operators, and unlicensed spectrum generally is shared spectrum that may be used by different operators or organizations. In one possible approach, the terminal and the network device need to perform a listen before talk (listen before talk, LBT) procedure (which may also be referred to as a channel access procedure) before transmitting information (e.g., data or signaling) using the unlicensed spectrum, i.e., the terminal needs to determine whether the channel is idle before transmitting data.

Typically, LBT is performed at granularity of the channel (e.g., 20 MHz). A communication device may detect whether a first channel (e.g., a first channel) is clear, e.g., whether a nearby communication device is occupying the first channel to transmit a signal, before the communication device transmits a signal (e.g., a data signal) on the first channel (e.g., denoted as the first channel), which detection process may be referred to as clear channel assessment (clear channel assessment, CCA) or as a channel access process.

The channel access procedure may include two types, illustratively a first type of channel access procedure and a second type of channel access procedure.

The first type of channel access procedure (which may also be referred to as a fixed duration based channel access procedure) may be: based on the energy detection of the fixed duration, for a certain bandwidth, for example, 20MHz, if the signal energy received by the communication device (the communication device may be a terminal device or a network device) in the fixed duration is less than or equal to a first preset threshold, the channel is considered to be idle, so that the communication device may use the idle channel to transmit data; otherwise, the channel is considered busy, so that the communication device does not use the busy channel to transmit data.

The second type of channel access procedure (which may also be referred to as a back-off based channel access procedure) may be: defining a window for a certain bandwidth based on energy detection of a rollback mechanism, wherein the window defines a range of the number of detected time slots, the communication equipment randomly selects a value A from the window (or a value range), and after the communication equipment detects at least A idle energy detection time slots, the communication equipment considers that a channel is idle, so that the communication equipment can use the idle channel to transmit data; otherwise, the channel is considered busy, so that the communication device does not use the busy channel to transmit data. The idle energy detection means that the energy of the received signal in a fixed time period is smaller than or equal to a second preset threshold. The first preset threshold and the second preset threshold may be predefined, for example, predefined by a protocol, which is not limited, and there is no limiting relationship between the first preset threshold and the second preset threshold, which may be the same or different.

Two results can be obtained when performing the channel access procedure: channel access procedure is complete (also referred to as LBT success) and channel access procedure is incomplete (also referred to as LBT failure). Wherein, there are multiple time domain starting positions in the time-frequency resource used for data transmission, confirm the signal channel is idle before the starting position of any time domain, then can regard the signal channel to cut in the course to finish; the channel is determined to be busy before all time domain start positions, the channel access procedure can be considered to be incomplete.

It is easy to understand that, in one possible implementation, the base station may directly use the uplink resource for uplink transmission after scheduling the uplink resource for the terminal in the scenario based on licensed spectrum operation, while the terminal may still need to LBT the uplink resource after scheduling the uplink resource for the terminal in the scenario based on unlicensed spectrum operation, and may use the uplink resource for uplink transmission after LBT is successful. In other words, if LBT is performed on the scheduled uplink resource, failure occurs, the scheduled uplink resource cannot be used.

In general, a sidelink grant (SL grant) may be a base station schedule or a terminal selectively acquired from a configured resource pool. The SL grant is used in the conventional scheme to determine a set (aset) of physical sidelink control channel (physical sidelink control channel, PSCCH) duration(s) and a set of physical sidelink shared channel (physical sidelink shared channel, PSSCH) duration(s). The physical sidelink feedback channel (physical sidelink feedback channel, PSFCH) resources do not require a terminal (e.g., user Equipment (UE)) to acquire the SL grant in advance, but are determined by associated PSSCH resources. Specifically, the RX UE starts transmitting PSFCH on the first slot including PSFCH resources after the last slot (slot) interval (also referred to as interval resource, e.g., slot-MinTimeGapPSFCH) received by the PSSCH, as shown in FIG. 1A. The sl-MinTimeGapPSFCH is configured in a resource pool, and can be specifically 2 slots or 3 slots.

In one possible implementation, the terminal communicates using unlicensed spectrum. As shown in fig. 1B, after the TX UE sends PSCCH and PSSCH to the RX UE, the RX UE directly determines a PSFCH resource according to the position of the PSSCH resource and the sl-MinTimeGapPSFCH configured in the resource pool, further needs to LBT the PSFCH resource, and after the LBT is successful, sends a hybrid automatic repeat request (hybrid automatic repeat request, HARQ) feedback to the TX UE on the PSFCH resource. Correspondingly, the TX UE also receives HARQ feedback on the corresponding PSFCH resources.

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

There are two general ways for a terminal to acquire a sidelink resource, which are called mode1 (mode 1) and mode2 (mode 2), respectively. When operating in mode1, the terminal acquires SL resources from the base station, and specifically, the base station may schedule the SL resources to the terminal through downlink control information (downlink control information, DCI), or configure SL configuration grant (configured grant) to the terminal through RRC message. In Mode2, the terminal may receive the SL resource pool configuration from the base station, or obtain the SL resource pool configuration from the pre-configuration, and then select SL resources from the SL resource pool to transmit. Specifically, the selection may be randomly selected, or selected based on the result of listening (sensing) or partial listening (partial sensing).

In order to more clearly and fully describe the technical solutions of the present application, some embodiments of the present application are described below with reference to the accompanying drawings.

As shown in fig. 1C, a network architecture schematic diagram applicable to an embodiment of the present application includes at least two terminals (e.g., a first terminal and a second terminal) and at least one network device. Alternatively, the first terminal may communicate with the network device via a wireless interface (e.g., uu port). The terminals can communicate with each other through network equipment, and also can communicate directly, such as through PC5 interfaces between the terminals.

It should be understood that the number of each device in the communication architecture shown in fig. 1C is merely illustrative, and the embodiments of the present application are not limited thereto, and more terminals, more network devices and other devices may be further included in the communication architecture in practical applications. For example, although not shown, the network architecture shown in fig. 1C may include other functional entities in addition to the network functional entities shown in fig. 1C, such as: core network elements, etc., without limitation.

Illustratively, a terminal (terminal), also referred to as a terminal device, in fig. 1C, is a device with wireless transceiver capability, which may be deployed on land, including indoor or outdoor, hand-held or vehicle-mounted; can also be deployed on the water surface (such as ships, etc.); but may also be deployed in the air (e.g., on aircraft, balloon, satellite, etc.). The terminal may be a User Equipment (UE), a mobile phone (mobile phone), a tablet (pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal, an augmented reality (augmented reality, AR) terminal, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned driving (self driving), a wireless terminal in telemedicine (remote media), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation security (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), a wireless terminal in smart home (UE), or the like. In the embodiment of the application, direct communication is supported between terminals, and the direct communication between terminals can also be called D2D communication.

Illustratively, the network device in fig. 1C is a device that provides wireless communication functions for a terminal, where the network device includes, but is not limited to: next generation base stations (gnodebs, gnbs), evolved node bs (enbs), radio network controllers (radio network controller, RNCs), node Bs (NB), base station controllers (base station controller, BSCs), base transceiver stations (base transceiver station, BTSs), home base stations (e.g., home evolved nodeB, or home node bs, HNBs), baseBand units (BBUs), transmission points (transmitting and receiving point, TRPs), transmission points (transmitting point, TPs), mobile switching centers, and the like in the fifth generation (5th generation,5G).

By way of example, the logical hierarchy of network devices may employ a Centralized Unit (CU) and a Distributed Unit (DU) split mode. Based on the configuration of the protocol stack functions, the CU-DU logic system can be divided into two types, namely a CU-DU separation architecture and a CU-DU fusion architecture. For CU-DU split architecture, the functions of the protocol stack may be dynamically configured and partitioned, with some functions implemented in the CU and the remaining functions implemented in the DU. To meet the needs of different segmentation options, it is necessary to support both ideal and non-ideal transport networks. The interface between CU and DU should follow the third generation partnership project (3rd generation partnership project,3GPP) specification requirements. For CU-DU fusion architecture, the logical functions of CU and DU are integrated in the same network device to realize all the functions of protocol stack.

The network architecture illustrated in fig. 1C may be suitable for use in a communication system of various radio access technologies, for example, a long term evolution (long term evolution, LTE) communication system, or a 5G (or new radio, NR) communication system, or a transition system between an LTE communication system and a 5G communication system, where the transition system may also be referred to as a 4.5G communication system, or a future communication system.

Link quality is one of the important indicators for measuring communication quality or communication experience, and in one possible implementation, the terminal measures link quality according to whether radio link failure (radio link failure, RLF) occurs. For example, the terminal may trigger the SL RLF after the side uplink in which the terminal is located satisfies a predetermined condition or trigger condition. Illustratively, the predetermined condition may be that the SL detects a continuous number of SL discontinuous transmissions (discontinuous transmission, DTX). But it may occur that the link quality between the TX UE and the RX UE may be better or that the distance between the two is not too great, an unreasonable SL RLF is triggered.

How to improve the accuracy of the detection side link quality is a problem to be solved. Specifically, how to improve the accuracy of judging the occurrence of SL RLF is a problem to be solved.

Fig. 2 is a schematic diagram of a communication method 200 according to an embodiment of the present application, for improving accuracy of detecting side uplink quality. The method is performed interactively between a first terminal (UE 1 for short) and a second terminal (UE 2 for short), but may also be performed interactively between components of UE1 and UE2, such as a chip or a chip system. For ease of description, hereinafter, taking this method as an example performed by UE1 and UE2, as shown in fig. 2, the method 200 may include the steps of:

s201: UE1 sends a first message to UE 2.

Accordingly, UE2 receives the first message from UE 1.

It is easy to understand that the first message may be understood as a message transmitted when communication is performed between UE1 and UE2, e.g. the first message may contain signaling and/or data. For example, the first message includes control information, and embodiments of the present application are not limited.

In a possible implementation, UE1 sends side-uplink control information (sidelink control information, SCI) to UE2, i.e. the first message is SCI.

Alternatively, there are a number of possible implementations or information carrying ways of SCI.

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

In one possible design, SCI is not indicated in a hierarchical manner, and embodiments of the present application are not limited.

In yet another possible implementation, UE1 sends data (also may be referred to as a data packet) to UE 2.

It is easy to understand that, in the embodiment of the present application, the UE1 is a data transmitting UE, and may operate in mode1 or mode2, and after acquiring the SL resource, send data to the UE2 using the SL resource. UE2 may send HARQ feedback to UE1 on a feedback resource (e.g., PSFCH) after receiving data sent by UE 1.

The UE1 sending the first message to the UE2 may be understood as that the UE1 sends a plurality of messages to the UE2, or periodically sends messages, or sends messages when there is a communication requirement. The embodiments of the present application do not limit the number of messages and the timing of sending the messages.

S202: UE2 LBT the feedback resources.

Optionally, after receiving the first message, UE2 determines a feedback resource, where the feedback resource is used for UE2 to send feedback information in response to the first message to UE 1. It is easy to understand that the embodiments of the present application do not limit the timing of determining the feedback resource by the UE 2.

It is to be appreciated that the feedback resources may also be replaced by channels of feedback resources. That is, step S202 may be referred to as UE2 LBT the PSFCH.

The feedback resource may be a licensed spectrum resource or an unlicensed spectrum resource.

In one possible manner, the feedback resource is a PSFCH resource, and it is easy to understand that the embodiment of the present application does not limit the type of the feedback resource, and the feedback resource is described below as an example of the PSFCH resource.

It is easy to understand that when the feedback resource is a licensed spectrum resource, the UE2 may not perform step S202, i.e., step S202 is an optional step. The several possible ways that step S202 is not performed are exemplarily described, one possible way is that other devices help UE2 to LBT feedback resources, and indicate the result of LBT to UE2, UE2 may not perform step S202. In yet another possible way, the transmission of the first message is based on unlicensed spectrum (or the PSFCH feedback resource itself is corresponding to unlicensed spectrum) and the UE2 needs to LBT the PSFCH resource. It is easy to understand that when the feedback resource is an unlicensed spectrum resource, in one possible implementation, the UE2 LBT the feedback resource.

UE2 may have a variety of possible implementations of LBT.

In one possible implementation, the LBT of the PSFCH resource is triggered when the UE2 receives the first stage SCI. This may allow UE2 to trigger LBT on PSFCH as early as possible.

In yet another possible implementation, the LBT of the PSFCH resource is triggered when the UE2 receives the second stage SCI. Alternatively, LBT of the PSFCH resource is triggered when the UE2 receives and is interested in the second stage SCI (interested in the L1 ID included in the second stage SCI) and the second stage SCI indicates HARQ feedback enabled. In this way, the LBT of unnecessary PSFCH resources can be avoided, and the extra power consumption waste of the UE2 is reduced. That is, when the UE2 determines that the condition triggering LBT of the PSFCH is not satisfied, the UE2 does not LBT the feedback resource, in which case step S202 may not be performed.

S203: (optional step) UE2 transmits the first channel to UE 1.

Optionally, the first channel is a PSFCH.

A transmission channel in an embodiment of the present application, for example, transmitting a PSFCH, may be understood as transmitting feedback information on a PSFCH channel, and for example, transmitting a PSFCH may be understood as transmitting feedback information on a PSFCH resource.

Alternatively, when UE2 LBT PSFCH and LBT is successful, UE2 sends PSFCH to UE 1. That is, when the feedback resource LBT is successful in step S202, step 203 is executed.

Of course, in one possible way, when the feedback resource is a licensed spectrum resource, step 203 is performed after step 201 is performed.

S203 may be understood as that UE2 transmits a PSFCH in response to the first message to UE 1.

Considering the resource information required for transmission and the priority information transmitted, there may be a case where UE2 does not transmit the PSFCH to UE1, for example, when UE2 LBT the PSFCH but LBT fails, UE2 fails to transmit the PSFCH to UE 1.

In yet another possible approach, PSFCH transmissions or transmissions are not sent because of a low priority collision. Specifically, it can be understood that UE2 transmits the PSFCH in response to the first message to UE1, and selects to transmit other information with high priority because the priority is low and does not transmit.

In yet another possible approach, UE2 sends a PSFCH to UE1, but UE1 does not successfully receive the PSFCH. The reason why the UE1 does not successfully receive the PSFCH may be that the side-link quality is poor, for example, packet loss occurs during transmission.

In the above-mentioned various ways, the UE1 may not receive the feedback information in response to the first message, so that the UE1 needs to accurately measure the side link, thereby improving the communication quality.

S204: UE1 performs side-link (SL) quality detection.

Or may be referred to as SL RLF detection, the UE1 will be described below taking as an example the detection of the side-link quality as SL RLF detection.

Optionally, the side-link refers to a side-link between UE1 and UE 2. In one possible approach, the SL is a unicast connection (alternatively referred to as a PC5 RRC connection) between UE1 and UE 2.

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

Wherein the first information includes side-link feedback information (hereinafter may also be simply referred to as feedback information) or, the first information is information corresponding to or associated with feedback information, which may be information in response to the first message. For example, the first information relates to feedback information transmitted after the UE2 receives the first message. It is easily understood that the feedback information may be used to indicate that the UE2 received the first message, e.g. the feedback information is SL HARQ feedback information.

Illustratively, the first information includes information whether the UE1 receives a first channel on the receiver, the first channel being used to carry the side-uplink feedback information. When UE1 does not receive the first channel or receives feedback information in response to the first message at the receiver opportunity, UE1 determines that the current transmission is SL DTX.

Optionally, the first information includes information whether the UE1 receives the first channel on multiple reception opportunities. Alternatively, the multiple reception opportunities may be consecutive multiple reception opportunities or discontinuous multiple reception opportunities.

The second information includes resource information and/or priority information, where the resource information may be resource information related to the present transmission, and it is easy to understand that the present transmission may include a first message sent by the UE1 to the UE2 and possible feedback information of the UE2 in response to the first message. For example, the resource information may be resource information corresponding to the first channel, or may be resource information corresponding to the first message, for example, resource information for transmitting the first message. Illustratively, 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 the embodiments of the present application do not limit that the resource information does not include other possible resource types, for example, if the resource of the type may cause the feedback information to be unsuccessfully transmitted, the resource type may also be included in the resource information, for example, the resource of the type is a high frequency resource or a millimeter wave resource. The priority information may include transmission priority information, for example, a priority of the transmission of the PSFCH for the UE 2.

The second information may be understood as including cause information of failure in transmission of the feedback information, which may include LBT failure or lower priority.

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

In yet another possible way, the UE1 receives the second information from other network elements or devices. For example, the method 200 may further include: UE1 receives the second information from UE 2. Optionally, the second information includes information of the number of transmission failures.

Alternatively, step S204 is performed in the case that the preset condition is satisfied. For example, the first parameter of the resource pool satisfies a first condition, where the first condition includes that the first parameter is greater than or equal to a first threshold (or belongs to a first list or belongs to a first range), and optionally, the first parameter is a parameter of the resource pool corresponding to the unlicensed 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 an unlicensed spectrum carrier corresponding to UE 1.

By the method, the UE1 determines the quality of the side link according to the first information and the second information, the accuracy of the quality detection of the side link is improved, and the unreasonable SL RLF is prevented from being triggered. For example, considering whether feedback information and reason information of failure of sending the feedback information (for example, failure of LBT resource and/or low priority of the resource carrying the feedback information) are received, it is possible to avoid failure of LBT of PSFCH resource, or that PSFCH transmission is not sent by low priority due to internal priority problem of UE2, and triggering unreasonable SL RLF on UE1 side, which improves SL communication quality.

Based on the scheme of fig. 2, fig. 3, fig. 4 and fig. 5 show a detailed example of the communication method, respectively. Next, referring to fig. 3, a flow chart of a communication method provided in an embodiment of the present application is provided. The embodiment shown in fig. 3 is applied alone or in combination with the embodiment shown in fig. 2.

The UE1 performs SL RLF detection based on the first information and the second information. For example, when PSFCH transmission is performed based on unlicensed spectrum, the PSFCH does not receive continuous SL DTX counts for which UE1 is not unicasting connections, and different threshold values for SL DTX counts may be configured for unlicensed spectrum communications.

S301: UE1 sends a first message to UE 2.

Accordingly, UE2 receives the first message from UE 1.

S302, (optional step) UE2 LBT the feedback resources.

S303: (optional step) UE2 transmits the first channel to UE 1.

The specific implementation of S301 to S303 may refer to the related descriptions of S201 to S203, and will not be described again.

S304: UE1 performs side-link quality detection.

Wherein S304 includes the steps of:

s304-1: the UE1 determines a first count parameter indicating the number of consecutive discontinuous transmissions of side-link occurrences between the UE1 and the UE2 from the first information and the second information.

Wherein the first counting parameter may be understood as being used for detecting or reflecting the quality of the side-links.

Optionally, determining the first count parameter includes adding 1 to the value of the first count parameter, or adding no 1 to the value of the first count parameter, or initializing the first count parameter to 0.

In a possible implementation (denoted as determining mode one), the UE1 determining the first counting parameter according to the first information and the second information comprises:

the UE1 determines to add 1 to the value of the first counting parameter for the authorized spectrum according to the fact that the first channel and the resources corresponding to the first channel are not received on the receiver; or alternatively, the process may be performed,

the UE1 determines that the value of the first counting parameter is not increased by 1 for the unlicensed spectrum according to the fact that the first channel and the resources corresponding to the first channel are not received on the receiver; or alternatively, the process may be performed,

The UE1 initializes the first count parameter to 0 according to the first channel received at the receiver and the unlicensed spectrum determination for the resources corresponding to the first channel.

It is easy to understand that the embodiment of the present application does not limit the order of determining the UE1, and the UE1 may determine according to the first information and the second information at the same time, or may determine sequentially. For example, UE1 may determine the first count parameter according to the first information, and on the basis of this, UE1 may determine the first count parameter according to the second information. For example, after determining that the value of the first counting parameter is increased by 1 according to the fact that the first channel is not received at the receiver, the UE1 determines resource information corresponding to the first channel, and determines whether to update the first counting parameter according to the result of the determination. For example, when the resource corresponding to the first channel is an unlicensed spectrum, it is determined to decrease the value of the first counting parameter by 1, and when the resource corresponding to the first channel is a licensed spectrum, UE1 determines to not increase the value of the first counting parameter by 1.

In yet another possible implementation manner (denoted as determining manner two), the determining of the first count parameter by the UE1 according to the first information and the second information may be replaced by the determining of the first count parameter by the UE1 according to the first information, where the determining manner two includes:

UE1 increases the value of the first counting parameter by 1 in accordance with the first channel determination not received at the receiver opportunity;

UE1 initializes the first count parameter to 0 based on receiving the first channel determination on the receiver opportunity.

And S304-2, the UE1 performs SL RLF detection according to the first counting parameter.

The UE1 performing SL RLF detection may also be understood as determining that the side uplink has or has not SL RLF occurred by the UE 1.

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

In a possible implementation, determining, by the UE1, whether SL RLF occurs or not according to the first count parameter and the threshold information includes:

the UE1 determines that SL RLF occurs according to the fact that the first counting parameter is larger than or equal to threshold information; or alternatively, the process may be performed,

the UE1 determines that no SL RLF occurs according to the first count parameter being smaller than the threshold information.

It is easy to understand that when the UE1 determines that the first count parameter is equal to the threshold information, in one manner, it determines that the SL RLF occurs, or in another manner, it may also determine that the SL RLF does not occur.

Optionally, the threshold information includes a first threshold and/or a second threshold, wherein the threshold corresponds to the resource type information, that is, different resource types correspond to different thresholds, e.g., the first threshold corresponds to side-uplink use licensed spectrum communications and the second threshold corresponds to SL use unlicensed spectrum communications. The embodiment of the application is not limited to include only two thresholds, and the number and the size of the thresholds may be determined according to the resource type information, for example, if the resource type further includes millimeter wave resources, the threshold information may further include a third threshold, where the third threshold corresponds to that the SL uses the millimeter wave resources.

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.

Alternatively, the different thresholds correspond to different manners of determining the first count parameter, e.g., the first threshold corresponds to the first manner of determining in step S304-1, and the second threshold corresponds to the second manner of determining in step S304-1.

Illustratively, the network device configures UE1 with a first threshold (e.g., a first SL-maxnumConsetiveDTX) and a second threshold (e.g., a second SL-maxNumConsetiveDTX), and when the side-link (e.g., unicast connection) uses unlicensed spectrum communication, then uses the second SL-maxNumConsetiveDTX for SL RLF detection; otherwise, SL RLF detection is performed based on the first SL-maxNumConsetifeDTX. Alternatively, the second sl-maxnumConsetifeDTX may be the product of the first sl-maxNumConsetifeDTX and a factor, e.g., the factor takes a value greater than 1. Alternatively, the network device may be configured through RRC dedicated signaling or a system message or a pre-configuration message, and it is easy to understand that the manner of configuring the threshold information by the network device may be replaced by a manner of predefining a protocol or writing the threshold information into a chip.

It is to be understood that the embodiment of the present application is not limited to the manner of determining the first count parameter in step S304-1 and the manner of corresponding to the threshold information in step S304-2, that is, in one possible manner, the determining manner two is adopted in step S304-1, and the threshold information in step S304-2 includes a plurality of thresholds, which respectively correspond to different resource types. In another possible way, the first determination is used in step S304-1, and the threshold information in step S304-2 includes a single threshold, which corresponds to different resource types.

By the method, when SL RLF detection is carried out, the influence of the transmitted resource type on whether the transmission is successful is considered, so that the accuracy of SL RLF detection is improved. For example, considering that after determining PSFCH resources using unlicensed spectrum, UE2 needs to LBT the PSFCH resources, where the PSFCH resources may be used by other operators or organizations in the SL unlicensed spectrum communication scenario, so that the LBT of the PSFCH resources may fail, further resulting in UE1 failing to receive HARQ feedback of UE2, further causing unreasonable SL DTX count on UE1 side, possibly resulting in SL RLF, where the link quality between UE1 and UE2 may still be better or the distance between both is not too far. The method avoids unreasonable SL RFL and improves the quality of SL communication. In a possible implementation, the false positives of SL RLF are reduced by configuring different threshold information, e.g. configuring the unlicensed spectrum with a larger threshold (because some SLDTX may be because LBT failed and not a link bad).

Next, referring to fig. 4, a flow chart of a communication method provided in an embodiment of the present application is provided. The embodiment shown in fig. 4 is applied 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 a cause of failure in sending the PSFCH, and UE1 rolls back the first count parameter according to the data or indication information.

S401: UE1 sends a first message to UE 2.

Accordingly, UE2 receives the first message from UE 1.

S402, (optional step) the UE2 performs LBT on the feedback resource.

S403: (optional step) UE2 transmits the first channel to UE 1.

The specific implementation of S401 to S403 may refer to the related descriptions of S201 to S203, and will not be described again.

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

The second message may include first indication information and/or data information from the UE2, the first indication information including information indicating that the first channel was not successful in transmission, the first channel being used to carry side-uplink feedback information.

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

Optionally, the method further comprises the UE2 determining the second message. It is to be understood that the embodiment of the present application is not limited to the manner in which the UE2 determines the second message, for example, the UE2 may record information related to the second message, and may periodically send the second message to the UE1, or the UE2 may send the second message to the UE1 after receiving the request message of the UE 1.

Optionally, the information that the first channel did not transmit successfully includes a number of times the first channel did not transmit successfully. Optionally, the information that the first channel is not successful in transmission includes a reason why the first channel is not successful in transmission, the reason includes that a channel access process of the first channel fails, or that a priority of the first channel is low. That is, the second message may contain resource information and priority information, with reference to the relevant description in method 200.

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

S405: UE1 performs side-link quality detection.

Wherein S405 includes the following steps:

s405-1: the UE1 updates the first counting parameter according to the second message.

Wherein the first count parameter is used to indicate the number of times of continuous discontinuous transmission that SL occurs between UE1 and UE 2. The relevant description of the first counting parameter may refer to the embodiment shown in fig. 3.

Optionally, updating the first count parameter by the UE1 according to the second message includes: the UE1 initializes the first counting parameter to 0 according to the second message, or rolls back the first counting parameter.

Optionally, backing off the first count parameter includes subtracting 1 from the first count parameter, or subtracting the number of times that the first indication information indicates that the transmission was not successful from the first count parameter.

It is to be understood that the method 400 is not limited to the manner in which the UE1 determines the first count parameter, for example, the method 300 describes, for example, the first determining manner and the second determining manner in which the UE1 determines the first count parameter.

Of course, the 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 count parameter in the manner of determination described in method 300, UE1 may ignore the content of the second message, or UE1 may consider the content of the second message in part. For example, the content of the second message includes the number b of LBT failures and the number c of unsuccessful transmission due to low priority, the value of the first calculation parameter determined by the UE1 according to the first determination mode is a, and the UE1 updates the first calculation parameter to a-b according to the second message, where a is greater than or equal to b, and a, b, and c are integers.

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

It is readily understood that the correlation implementation of S405-2 may be described with reference to the correlation of S304-2.

By the method, the UE2 sends the second message to the UE1 to indicate whether to back the first counting parameter or the times of back the first counting parameter, and the UE1 updates the first counting parameter according to the second message, so that the accuracy of SL RLF detection is improved. The triggering of unreasonable SL RLF is avoided, thereby improving the SL communication quality.

As shown in fig. 5, the embodiment of the present application introduces a flowchart for SL RLF detection by the UE 1. Illustratively, when UE1 is acting as a TX UE, UE1 detects multiple consecutively occurring SL DTX's for one side uplink (e.g., unicast connection), i.e., multiple consecutively without receiving SL feedback information on the feedback resource, would trigger the SL RLF for that unicast connection. Optionally, UE1 is configured with threshold information to control SL RLF detection, e.g., UE1 triggers SL RLF for the unicast connection after UE1 detects that the number of consecutively occurring SL DTX's satisfies the threshold information.

UE1 maintains a first count parameter (described by way of example as numconsetivesx) for each unicast connection (PC 5 RRC connection) for counting the number of consecutive DTX's that occur for that unicast connection.

UE1 (e.g., SL HARQ entity of UE 1) performs for each receiver opportunity (e.g., PSFCH receiver opportunity):

s501: the numConsetifeDTX variable for the unicast connection is initialized to 0.

It can be appreciated that when a unicast connection is established or threshold information (e.g., introduced by taking threshold information as SL-maxnumConsettifen DTX as an example) is (re) configured, UE1 (e.g., SL HARQ entity of UE 1) initializes numConsettifen DTX for each unicast connection to 0:

step S502 is performed after step S501.

S502: UE1 determines whether feedback information (e.g., PSFCH or SL HARQ feedback) is received on the receiver.

If no feedback information is received at the receiver, S503 is performed. Otherwise, if feedback information is received at the receiver, S501 is performed.

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

If the resource corresponding to the feedback information is unlicensed spectrum, S505 is performed. Otherwise, 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, S504 is performed.

S504: numConsetifeDTX is incremented by 1.

Step S505 is executed after step S504.

S505: UE1 determines whether numconsetifedtx reaches sl-maxnumconsetifedtx.

If numConsetifeDTX reaches sl-maxNumConsetifeDTX, step S506 is performed. Otherwise, if numConsetifeDTX does not reach sl-maxNumConsetifeDTX, step 502 is performed. It can be appreciated that the UE1 continues to determine whether feedback information is received at the next receiver opportunity.

Optionally, in a possible manner, numConsetifeDTX reaches sl-maxNumConsetifeDTX to be greater than or equal to sl-maxNumConsetifeDTX. In yet another possible way, numConsetifeDTX reaches sl-maxNumConsetifeDTX with numConsetifeDTX greater than sl-maxNumConsetifeDTX.

It should be noted that, names of network elements, interface names between network elements, information and messages in the foregoing embodiments are just an example, and in specific implementations, names of network elements, interface names between network elements, information and messages can be other names, which are not limited in particular in the embodiments of the present application.

The scheme provided by the embodiment of the application is mainly introduced from the aspect of interaction between the first terminal and the second terminal. It will be appreciated that in order to achieve the above-described functions, the terminal may comprise hardware structures and/or software modules that perform the respective functions. Those of skill in the art will readily appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

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

Fig. 6 shows a schematic structure of a device. The apparatus 600 may be a network device or a terminal, a server, or a centralized controller, or may be a chip, a chip system, or a processor, etc. that supports the network device, the terminal, the server, or the centralized controller to implement the above method. The device can be used for realizing the method described in the method embodiment, and can be particularly referred to the description in the method embodiment.

The apparatus 600 may comprise one or more processors 601, which processors 601 may also be referred to as processing units, may implement certain control functions. The processor 601 may be a general purpose processor or a special purpose processor or the like. For example, a baseband processor or a central processing unit. The baseband processor may be used to process communication protocols and communication data, and the central processor may be used to control communication devices (e.g., base stations, baseband chips, terminals, terminal chips, DUs or CUs, etc.), execute software programs, and process data of the software programs.

In an alternative design, the processor 601 may also have instructions and/or data 603 stored therein, where the instructions and/or data 603 may be executed by the processor to cause the apparatus 600 to perform the method described in the method embodiments above.

In another alternative design, the processor 601 may include a transceiver unit for implementing the receive and transmit functions. For example, the transceiver unit may be a transceiver circuit, or an interface circuit, or a communication interface. The transceiver circuitry, interface or interface circuitry for implementing the receive and transmit functions may be separate or may be integrated. The transceiver circuit, interface or interface circuit may be used for reading and writing codes/data, or the transceiver circuit, interface or interface circuit may be used for transmitting or transferring signals.

In yet another possible design, apparatus 600 may include circuitry to implement the functions of transmitting or receiving or communicating in the foregoing method embodiments.

Optionally, the apparatus 600 may include one or more memories 602, on which instructions 604 may be stored, which may be executed on the processor, to cause the apparatus 600 to perform the methods described in the method embodiments above. Optionally, the memory may further store data. In the alternative, the processor may store instructions and/or data. The processor and the memory may be provided separately or may be integrated. For example, the correspondence described in the above method embodiments may be stored in a memory or in a processor.

Optionally, the apparatus 600 may further comprise a transceiver 605 and/or an antenna 606. The processor 601 may be referred to as a processing unit, controlling the apparatus 600. The transceiver 605 may be referred to as a transceiver unit, a transceiver circuit, a transceiver device, a transceiver module, or the like, for implementing a transceiver function.

Alternatively, the apparatus 600 in the embodiments of the present application may be used to perform the methods described in fig. 2 to 5 in the embodiments of the present application.

The processors and transceivers described herein may be implemented on integrated circuits (integrated circuit, ICs), analog ICs, radio frequency integrated circuits RFICs, mixed signal ICs, application specific integrated circuits (application specific integrated circuit, ASIC), printed circuit boards (printed circuit board, PCB), electronic devices, and the like. The processor and transceiver may also be fabricated using a variety of IC process technologies such as complementary metal oxide semiconductor (complementary metal oxide semiconductor, CMOS), N-type metal 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 apparatus described in the above embodiment may be a network device or a terminal, but the scope of the apparatus described in the present application is not limited thereto, and the structure of the apparatus may not be limited by fig. 6. The apparatus may be a stand-alone device or may be part of a larger device. For example, the device may be:

(1) A stand-alone integrated circuit IC, or chip, or a system-on-a-chip or subsystem;

(2) Having a set of one or more ICs, which may optionally also include storage means for storing data and/or instructions;

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

(4) Modules that may be embedded within other devices;

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

(6) Others, and so on.

Fig. 7 provides a schematic structural diagram of a terminal. The terminal may be adapted for use in the scenario illustrated in fig. 1. For convenience of explanation, fig. 7 shows only 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-output device. The processor is mainly used for processing the communication protocol and the communication data, controlling the whole terminal, executing the software program and processing the data of the software program. The memory is mainly used for storing software programs and data. The radio frequency circuit is mainly used for converting a baseband signal and a radio frequency signal and processing the radio frequency signal. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are mainly used for receiving data input by a user and outputting data to the user.

When the terminal is started, 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 is required to be transmitted wirelessly, the processor carries out baseband processing on the data to be transmitted and then outputs a baseband signal to the radio frequency circuit, and the radio frequency circuit processes the baseband signal to obtain a radio frequency signal and transmits the radio frequency signal outwards in the form of electromagnetic waves through the antenna. When data is transmitted to the terminal, the radio frequency circuit receives a 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. The memory may also be referred to as a storage medium or storage device, etc., and embodiments of the present invention are not limited in this respect.

As an alternative implementation manner, the processor may include a baseband processor, which is mainly used to process the communication protocol and the communication data, and a central processor, which is mainly used to control the whole terminal, execute a software program, and process the data of the software program. The processor in fig. 7 integrates the functions of a baseband processor and a central processing unit, and those skilled in the art will appreciate that the baseband processor and the central processing unit may be separate processors, interconnected by bus technology, etc. Those skilled in the art will appreciate that a terminal may include multiple baseband processors to accommodate different network formats, and that a terminal may include multiple central processors to enhance its processing capabilities, with various components of the terminal being connectable via 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 the communication data may be built in the processor, or may be stored in the storage unit in the form of a software program, which is executed by the processor to realize the baseband processing function.

In one example, the antenna and the control circuit having the transmitting and receiving function may be regarded as the transmitting and receiving unit 711 of the terminal 700, and the processor having 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 transceiving unit 711 and a processing unit 712. The transceiver unit may also be referred to as a transceiver, transceiver device, etc. Alternatively, a device for realizing a receiving function in the transceiver unit 711 may be regarded as a receiving unit, and a device for realizing a transmitting function in the transceiver unit 711 may be regarded as a transmitting unit, i.e., the transceiver unit 711 includes a receiving unit and a transmitting unit. For example, the receiving unit may also be referred to as a receiver, a receiving circuit, etc., and the transmitting unit may be referred to as a transmitter, a transmitting circuit, etc. Alternatively, the receiving unit and the transmitting unit may be integrated together, or may be a plurality of independent units. The receiving unit and the transmitting unit may be located in one geographical location or may be distributed among a plurality of geographical locations.

As shown in fig. 8, yet another embodiment of the present application provides an apparatus 800. The apparatus may be a terminal or a network device, or may be a component (e.g., an integrated circuit, a chip, etc.) of a terminal or a network device. The device may also be other communication modules, for implementing the method in the method embodiment of the present application. The apparatus 800 may include: the processing module 802 (or 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 be further included.

In one possible design, one or more modules as in FIG. 8 may be implemented by one or more processors or by one or more processors and memory; or by one or more processors and transceivers; or by one or more processors, memories, and transceivers, to which embodiments of the present application are not limited. The processor, the memory and the transceiver can be arranged separately or integrated.

The device has the function of realizing the terminal described in the embodiment of the application, for example, the device comprises a module or a unit or means (means) corresponding to the steps involved in the terminal described in the embodiment of the application, and the function or the unit or means (means) can be realized by software, or realized by hardware, or realized by executing corresponding software by hardware, or realized by a mode of combining software and hardware. Or the apparatus has a function of implementing the network device described in the embodiment of the present application, for example, the apparatus includes a module or a unit or means (means) corresponding to the steps involved in the network device described in the embodiment of the present application when the network device executes the network device, where the function or the unit or means (means) may be implemented by software, or implemented by hardware, or implemented by executing corresponding software by hardware, or may be implemented by a combination of software and hardware. Reference is further made in detail to the corresponding description in the foregoing corresponding method embodiments.

Alternatively, each module in the apparatus 800 in the embodiments of the present application may be used to perform the methods described in fig. 2 to 5 in the embodiments of the present application.

Specifically, in one embodiment, the transceiver unit 801 is configured to: transmitting a first message to a second terminal, wherein the first message comprises signaling and/or data; the processing unit 802 is configured to determine a first count parameter according to the first information and the second information, where the first count parameter is used to indicate a number of times of continuous discontinuous transmission that occurs in a side link between the apparatus and the second terminal, and the first count parameter is used to detect quality of the side link; wherein the first information includes information whether the device receives a first channel on a receiver, the first channel being used to carry side uplink feedback information; the second information includes resource information corresponding to the first channel, where the resource information includes that resources corresponding to the first channel are licensed spectrum or unlicensed spectrum.

Optionally, the processing unit 802 is further configured to determine that a side-link radio link failure occurs or does not occur according to the first count parameter.

Optionally, the transceiver 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: transmitting a first message to a second terminal, wherein the first message comprises signaling and/or data; the transceiver unit 801 is further configured to receive a second message from 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 a number of continuous discontinuous transmission occurring between the device and the second terminal; the second message includes first indication information and/or data information from the second terminal, the first indication information includes information for indicating that a first channel is not successful in transmission, and the first channel is used for carrying side uplink feedback information.

Optionally, the processing unit 802 is further configured to determine that a side-link radio link failure occurs or does not occur 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 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, the first indication information includes information for indicating that the first channel is not successful in sending, and the first channel is used to carry side uplink feedback information.

Optionally, the first channel is used for responding to the first message.

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

Those skilled in the art will understand that, for convenience and brevity, the specific working process of the system, apparatus and unit described above may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.

It can be understood that some optional features in the embodiments of the present application may be implemented independently in some scenarios, independent of other features, such as the scheme on which they are currently based, so as to solve corresponding technical problems, achieve corresponding effects, or may be combined with other features according to requirements in some scenarios. Accordingly, the apparatus provided in the embodiments of the present application may also implement these features or functions accordingly, which is not described herein.

Those of skill would further appreciate that the various illustrative logical blocks (illustrative logical block) and steps (steps) described in connection with the embodiments herein may be implemented as electronic hardware, computer software, or combinations of both. Whether such functionality is implemented as hardware or software depends upon the particular application and design requirements of the overall system. Those skilled in the art may implement the described functionality using a variety of methods for their respective applications, but such implementation should not be construed as beyond the scope of the embodiments of the present application.

It will be appreciated that the processor in the embodiments of the present application may be an integrated circuit chip with signal processing capabilities. In implementation, the steps of the above method embodiments may be implemented by integrated logic circuits of hardware in a processor or instructions in software form. The processor may 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 programmable logic device, discrete gate or transistor logic device, discrete hardware components.

It will be appreciated that the memory in embodiments of the present application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. The volatile memory may be random access memory (random access memory, RAM) which acts as an external cache. By way of example, and not limitation, many forms of RAM are available, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous DRAM (SLDRAM), and direct memory bus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

The present application also provides a computer readable storage medium having stored thereon a computer program which when executed by a computer performs the functions of any of the method embodiments described above.

The present application also provides a computer program product comprising a computer program (which may also be referred to as code, or instructions) which, when executed by a computer, performs the functions of any of the method embodiments described above.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, 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 a computer, the processes or functions described in accordance with embodiments of the present application are produced in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., 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, data center, etc. that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a high-density digital video disc (digital video disc, DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), or the like.

It is appreciated that reference throughout this specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, various embodiments are not necessarily referring to the same embodiments throughout the specification. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. It should be understood that, in various embodiments of the present application, the sequence numbers of the foregoing processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic of the processes, and should not constitute any limitation on the implementation process of the embodiments of the present application. It is to be understood that in this application, the terms "when …," "if," and "if" are used to indicate that the device is doing so under some objective condition, are not intended to limit the time and require no action to be determined by the device when it is implemented, nor are other limitations meant to be implied.

It will be appreciated that in embodiments of the present application, "B corresponding to a" means that B is associated with a, from which B may be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may also determine B from a and/or other information.

Predefined in this application may be understood as defining, predefining, storing, pre-negotiating, pre-configuring, curing, or pre-firing.

It will be appreciated that the systems, apparatus, and methods described herein may be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may 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 in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a read-only memory (ROM), a random access memory (random access memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The same or similar parts between the various embodiments in this application may be referred to each other. In the various embodiments and the various implementation/implementation methods in the various embodiments in this application, if no special description and logic conflict exist, terms and/or descriptions between different embodiments and between the various implementation/implementation methods in the various embodiments may be consistent and may be mutually referred to, technical features in the different embodiments and the various implementation/implementation methods in the various embodiments may be combined to form new embodiments, implementations, implementation methods, or implementation methods according to their inherent logic relationships. The above-described embodiments of the present application are not intended to limit the scope of the present application.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application.

Claims

1. A method of communication, comprising:

the method comprises the steps that a first terminal sends a first message to a second terminal, wherein the first message comprises signaling and/or data;

the first terminal determines a first counting parameter according to first information and second information, wherein the first counting parameter is used for indicating the times of continuous discontinuous transmission of a side uplink between the first terminal and the second terminal, and the first counting parameter is used for detecting the quality of the side uplink;

the first information comprises information whether the first terminal receives a first channel on a receiving opportunity, wherein the first channel is used for bearing side uplink feedback information; the second information includes resource information corresponding to the first channel, where the resource information includes that resources corresponding to the first channel are licensed spectrum or unlicensed spectrum.

2. The method of claim 1, wherein the first count parameter for detecting the quality of the side link comprises:

And the first terminal determines whether the side-link wireless link failure occurs or not according to the first counting parameter and the threshold information.

3. The method according to claim 1 or 2, wherein the determining a first count parameter comprises adding 1 to the value of the first count parameter, or adding no 1 to the value of the first count parameter, or initializing the first count parameter to 0.

4. A method according to any of claims 1 to 3, wherein the first terminal determining a first count parameter from the first information and the second information comprises:

and the first terminal initializes the first counting parameter to 0 according to the first channel received on the receiver and the unlicensed spectrum determination of the resources corresponding to the first channel.

5. The method according to any of claims 1 to 4, wherein a first parameter of a resource pool corresponding to an unlicensed spectrum carrier satisfies a first condition, the first condition being greater than or equal to a first threshold, or belonging to a first list, or belonging to a first range, the first parameter comprising a resource quality parameter or a signal quality parameter.

6. The method according to any one of claims 1 to 5, wherein the first terminal determining whether a side-link radio link failure has occurred or not according to the first count parameter and threshold information comprises:

the first terminal determines that the side uplink wireless link failure occurs according to the fact that the first counting parameter is greater than or equal to the threshold information; or alternatively, the process may be performed,

and the first terminal determines that the side-link wireless link failure does not occur according to the fact that the first counting parameter is smaller than the threshold information.

7. The method according to any of claims 1 to 6, wherein the threshold information comprises a first threshold, and/or a second threshold, wherein the first threshold corresponds to the SL using licensed spectrum communication and the second threshold corresponds to the SL using unlicensed spectrum communication.

8. The method of claim 7, wherein the second threshold is greater than the first threshold.

9. The method according to any of claims 1 to 8, wherein the threshold information is network device configured, or predefined or preconfigured.

10. A method of communication, comprising:

the first terminal receives a second message from the second terminal;

the first terminal updates a first counting parameter according to the second message, wherein the first counting parameter is used for indicating the times of continuous discontinuous transmission (SL) between the first terminal and the second terminal;

the second message includes first indication information and/or data information from the second terminal, the first indication information includes information for indicating that a first channel is not successful in transmission, and the first channel is used for carrying side uplink feedback information.

11. The method according to claim 10, wherein the method further comprises:

12. The method according to claim 10 or 11, wherein the information that the first channel did not transmit successfully comprises a number of times the first channel did not transmit successfully.

13. The method according to any of claims 10 to 12, wherein the information that the first channel did not transmit successfully comprises a reason for the first channel did not transmit successfully, the reason comprising a failure of a channel access procedure of the first channel, or a low priority of the first channel.

14. The method according to any of the claims 10 to 13, wherein the first terminal updating the first counting parameter based on the second message comprises:

and initializing the first counting parameter to 0 by the first terminal according to the second message, or backing the first counting parameter.

15. The method of any of claims 14, wherein the rolling back the first count parameter comprises:

subtracting 1 from the first count parameter, or subtracting the number of times of unsuccessful transmission indicated by the first indication information from the first count parameter.

16. A method of communication, comprising:

The second terminal receives a first message from the first terminal, wherein the first message comprises signaling and/or data;

the second terminal sends a second message to the first terminal, wherein the second message comprises first indication information and/or data information, the first indication information comprises information for indicating that a first channel is not successful in sending, and the first channel is used for bearing side uplink feedback information.

17. The method of claim 16, wherein the method further comprises:

the second terminal determines the second message.

18. The method according to claim 16 or 17, characterized in that the method further comprises:

and the second terminal determines feedback resources, wherein the feedback resources are used for sending the feedback information.

19. The method of claim 18, wherein the second terminal listens-before-talk LBT on the feedback resource.

20. A communication device comprising means for implementing the method of any one of claims 1 to 9, or of any one of claims 10 to 15, or of any one of claims 16 to 19.

21. A communication device, comprising: a processor coupled to a memory for storing a program or instructions that, when executed by the processor, cause the apparatus to perform the method of any one of claims 1 to 9, or of any one of claims 10 to 15, or of any one of claims 16 to 19.

22. A computer readable medium having stored thereon a computer program or instructions, which when executed, cause a computer to perform the method of any of claims 1 to 9, or of any of claims 10 to 15, or of any of claims 16 to 19.

23. A computer program product comprising instructions which, when executed, cause the method of any one of claims 1 to 9, or of any one of claims 10 to 15, or of any one of claims 16 to 19 to be performed.