Direct link beam failure information indication method and device, and storage medium

Abstract

The invention provides a direct link beam failure information indication method and device and a storage medium, and the method comprises the steps that a first terminal sends indication information to a second terminal through a first channel, and the indication information is used for indicating related information of direct link beam failure; the time domain position of the first channel is related to a first reference time slot, and / or the resource of the first channel is related to a candidate beam determination (CBD) reference signal or is related to a new straight-through link beam, so that the first terminal can timely inform the second terminal of indication information for indicating the failure of the straight-through link beam; therefore, the second terminal can timely adopt methods such as beam replacement to avoid data transmission failure, and the straight-through link communication success rate is improved.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a method, device and storage medium for indicating direct link beam failure information. Background Art

[0002] In the new radio access vehicle-to-vehicle (NR V2X) technology, terminals communicate directly with each other on a direct link. Even if the beam alignment is completed between the transmitting terminal and the receiving terminal in the initial beam pairing stage of the direct link beam, the terminal may be in motion and new obstructions may appear between the transmitting terminal and the receiving terminal, which may cause the receiving terminal to be unable to receive the direct link beam sent by the transmitting terminal. In this case, a direct link beam failure occurs, which leads to a failure of direct link data transmission or a low transmission rate. Summary of the invention

[0003] The present application aims to solve, at least to some extent, one of the technical problems in the related art in which relevant information on the failure of a link beam needs to be notified to the transmitting terminal.

[0004] To this end, the present application proposes a method, device and processor-readable storage medium for indicating direct link beam failure information. The first terminal can promptly notify the second terminal of the indication information used to indicate the failure of the direct link beam, so that the second terminal can promptly take methods such as changing the beam to avoid data transmission failure and improve the success rate of direct link communication.

[0005] The first aspect of the present application proposes a method for indicating direct link beam failure information, the method comprising: a first terminal sends indication information to a second terminal through a first channel, wherein the indication information is used to indicate relevant information of the direct link beam failure, the time domain position of the first channel is related to the first reference time slot, and / or the resources of the first channel are related to the candidate beam determination CBD reference signal or to a new direct link beam.

[0006] The second aspect of the present application proposes a method for indicating direct link beam failure information, the method comprising: a second terminal receives indication information sent by a first terminal through a first channel, wherein the indication information is used to indicate relevant information of the direct link beam failure, the time domain position of the first channel is related to the first reference time slot, and / or the resources of the first channel are related to a candidate beam determined CBD reference signal or are related to a new direct link beam.

[0007] The third aspect of the present application proposes an indication device for direct link beam failure information, the device comprising: a sending unit, used to control a first terminal to send indication information to a second terminal through a first channel, wherein the indication information is used to indicate relevant information of the direct link beam failure, the time domain position of the first channel is related to the first reference time slot, and / or the resources of the first channel are related to the candidate beam determination CBD reference signal or are related to a new direct link beam.

[0008] The fourth aspect of the present application proposes an indication device for direct link beam failure information, the device comprising: a receiving unit, used to control the second terminal to receive indication information sent by the first terminal through the first channel, wherein the indication information is used to indicate relevant information of the direct link beam failure, the time domain position of the first channel is related to the first reference time slot, and / or the resources of the first channel are related to the candidate beam determination CBD reference signal or are related to a new direct link beam.

[0009] The device for indicating the failure information of a direct link beam proposed in the fifth aspect of the embodiment of the present application includes: a memory, a transceiver, and a processor: a memory for storing a computer program; a transceiver for sending and receiving data under the control of a processor; a processor for reading the computer program in the memory and performing the following operations: a first terminal sends indication information to a second terminal via a first channel, wherein the indication information is used to indicate relevant information of the failure of the direct link beam, the time domain position of the first channel is related to the first reference time slot, and / or the resources of the first channel are related to a CBD reference signal for determining a candidate beam or are related to a new direct link beam.

[0010] The device for indicating the failure information of a direct link beam proposed in the sixth aspect embodiment of the present application includes: a memory, a transceiver, and a processor: a memory for storing a computer program; a transceiver for sending and receiving data under the control of a processor; a processor for reading the computer program in the memory and performing the following operations: a second terminal receives the indication information sent by the first terminal through the first channel, wherein the indication information is used to indicate relevant information of the failure of the direct link beam, the time domain position of the first channel is related to the first reference time slot, and / or the resources of the first channel are related to the CBD reference signal determined by the candidate beam or are related to a new direct link beam.

[0011] The processor-readable storage medium proposed in the seventh aspect embodiment of the present application stores a computer program, and the computer program is used to enable the processor to execute: the method for indicating the direct link beam failure information proposed in the first aspect embodiment of the present application, or the method for indicating the direct link beam failure information proposed in the second aspect embodiment of the present application.

[0012] The present application provides a method, device and processor-readable storage medium for indicating direct link beam failure information. The first terminal can promptly notify the second terminal of the indication information used to indicate the direct link beam failure, so that the second terminal can promptly adopt methods such as changing the beam to avoid data transmission failure and improve the success rate of direct link communication.

[0013] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0015] Figure 1 It is a flowchart of a method for indicating direct link beam failure information proposed in an embodiment of the present application;

[0016] Figure 2a It is a schematic diagram of the time division multiplexing of PSBFCH and PSFCH proposed in an embodiment of the present application;

[0017] Figure 2b It is a schematic diagram of Type 2 PSFCH and PSFCH code division multiplexing proposed in an embodiment of the present application;

[0018] Figure 3 It is a flowchart of a method for indicating direct link beam failure information proposed in another embodiment of the present application;

[0019] Figure 4 It is a flowchart of a method for indicating direct link beam failure information proposed in another embodiment of the present application;

[0020] Figure 5 is a schematic diagram of a beam used by a first channel proposed in an embodiment of the present application;

[0021] Figure 6 It is a flowchart of a method for indicating direct link beam failure information proposed in another embodiment of the present application;

[0022] Figure 7 It is a flowchart of a method for indicating direct link beam failure information proposed in another embodiment of the present application;

[0023] Figure 8 It is a flowchart of a method for indicating direct link beam failure information proposed in another embodiment of the present application;

[0024] Fig. 9 It is a flowchart of a method for indicating direct link beam failure information proposed in another embodiment of the present application;

[0025] Fig.10a is a schematic diagram of a method for determining a time slot occupied by a first channel proposed in an embodiment of the present application;

[0026] Fig.10b is a schematic diagram of a method for determining a time slot occupied by a first channel proposed in another embodiment of the present application;

[0027] Fig.10c is a schematic diagram of a method for determining a time slot occupied by a first channel proposed in another embodiment of the present application;

[0028] Fig.10d is a schematic diagram of a method for determining a time slot occupied by a first channel proposed in another embodiment of the present application;

[0029] Fig.10e is a schematic diagram of the minimum time interval between the time slot occupied by the first channel and the first reference time slot proposed in an embodiment of the present application;

[0030] Fig.11 It is a flowchart of a method for indicating direct link beam failure information proposed in another embodiment of the present application;

[0031] Fig.12 It is a schematic diagram of a method for determining a candidate resource set of a channel proposed in an embodiment of the present application;

[0032] Fig.13 It is a flowchart of a method for indicating direct link beam failure information proposed in an embodiment of the present application;

[0033] Fig.14 It is a structural schematic diagram of a device for indicating direct link beam failure information proposed in an embodiment of the present application;

[0034] Fig.15 It is a structural schematic diagram of a device for indicating direct link beam failure information proposed in an embodiment of the present application;

[0035] Fig.16 It is a structural schematic diagram of a device for indicating direct link beam failure information proposed in another embodiment of the present application;

[0036] Fig.17 It is a structural diagram of a device for indicating direct link beam failure information proposed in another embodiment of the present application. DETAILED DESCRIPTION

[0037] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be construed as limiting the present application. On the contrary, the embodiments of the present application include all changes, modifications and equivalents that fall within the spirit and connotation of the appended claims.

[0038] In the embodiments of the present application, the term "and / or" describes the association relationship of the associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0039] In the embodiments of the present application, the term "plurality" refers to two or more than two, and other quantifiers are similar.

[0040] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0041] The technical solution provided in the embodiment of the present application can be applicable to a variety of systems, especially 5G systems. For example, applicable systems may be Global System of Mobile Communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) General Packet Radio Service (GPRS) system, Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD) system, Long Term Evolution Advanced (LTE-A) system, Universal Mobile Telecommunication System (UMTS), 5G New Radio (NR) system, etc. These various systems include terminals and network equipment. The system may also include a core network part, such as an evolved packet system (EPS), a 5G system (5GS), etc.

[0042] In the related technology, that is, in the initial beam pairing stage of the direct link beam, the beam alignment is completed between the transmitting terminal and the receiving terminal. However, since the terminal may be in motion and new obstructions may appear between the transmitting terminal and the receiving terminal, the receiving terminal may not be able to receive the direct link beam sent by the transmitting terminal. At this time, a direct link beam failure will occur, which will lead to a failure of direct link data transmission or a low transmission rate.

[0043] Therefore, in an embodiment of the present application, in order to solve the technical problem in the related technology that the direct link beam fails, which in turn leads to the failure of direct link data transmission or a low transmission rate, the first terminal sends an indication message to the second terminal through the first channel, wherein the indication information is used to indicate relevant information of the direct link beam failure, the time domain position of the first channel is related to the first reference time slot, and / or the resources of the first channel are related to the candidate beam determination CBD reference signal or to the new direct link beam, so that the first terminal can promptly notify the second terminal of the indication information indicating the failure of the direct link beam, so that the second terminal can promptly adopt methods such as changing the beam to avoid data transmission failure and improve the success rate of direct link communication.

[0044] Figure 1 It is a flowchart of a method for indicating direct link beam failure information proposed in an embodiment of the present application.

[0045] It should be noted that the executor of the method for indicating direct link beam failure information in this embodiment is a device for indicating direct link beam failure information, which can be implemented by software and / or hardware, and can be configured in a network device without limitation.

[0046] S101: The first terminal sends indication information to the second terminal through the first channel, wherein the indication information is used to indicate relevant information about the failure of the direct link beam, the time domain position of the first channel is related to the first reference time slot, and / or the resources of the first channel are related to the CBD reference signal determined by the candidate beam or are related to a new direct link beam.

[0047] Among them, in the initial beam pairing stage of the direct link beam, the beam alignment is completed between the transmitting terminal and the receiving terminal. However, since the terminal may be in motion and new obstructions may appear between the transmitting terminal and the receiving terminal, the receiving terminal may not be able to receive the direct link beam sent by the transmitting terminal. At this time, a direct link beam failure will occur, which will lead to a failure of direct link data transmission or a low transmission rate. In this case, the receiving terminal needs to notify the transmitting terminal of relevant information about the direct link beam failure, so that the sending terminal can take methods such as changing the beam to avoid data transmission failure.

[0048] The first terminal is a receiving terminal, and the second terminal is a sending terminal.

[0049] The first channel may be used by the first terminal to transmit indication information to the second terminal.

[0050] The indication information is used to indicate relevant information of the failure of the direct link beam.

[0051] Optionally, in some embodiments, the relevant information of the direct link beam failure includes at least one of the following: new direct link beam information; first information, wherein the first information is used to indicate whether there is a direct link beam failure; second information, wherein the second information is used to indicate the existence of a direct link beam failure.

[0052] The new through link beam information may specifically include: a new through link beam pointing direction, a new through link beam shape, a new through link beam weight, etc., and there is no limitation on this.

[0053] That is to say, in an embodiment of the present application, the first terminal sends relevant information indicating a direct link beam failure to the second terminal through the first channel, so that the second terminal can use a new beam to communicate in the direct link based on the new direct link beam information in the relevant information of the direct link beam failure, and / or the second terminal can promptly know whether there is a direct link beam failure based on the first information in the relevant information of the direct link beam failure, and / or the second terminal can promptly know whether there is a direct link beam failure based on the second information in the relevant information of the direct link beam failure, so that the second terminal can promptly take methods such as changing the beam to avoid data transmission failure.

[0054] The time domain position of the first channel is related to the first reference time slot, and / or the resources of the first channel are related to a candidate beam determination (CBD) reference signal or to a new direct link beam.

[0055] A certain time is usually divided into multiple time slots, each of which has a fixed duration. Different devices or users can transmit and receive signals in different time slots to avoid conflicts and interferences with each other.

[0056] Optionally, in some embodiments, the first reference time slot includes at least one of the following: a time slot where a beam failure occurs; a time slot where a beam failure is determined by the first terminal; a time slot where a beam failure instance (Beam Failure Instance, BFI) is located, and a time slot where a candidate beam determination (Candidate Beam Determination, CBD) is located.

[0057] The resources of the first channel may be, for example: the time slot occupied by the first channel, the number of resource blocks (Resource Block, RB) occupied by the first channel, and there is no limitation on this.

[0058] Among them, the candidate beam determination (CBD) reference signal can be used for channel estimation and beam selection in the candidate beam determination (CBD) process.

[0059] The new direct link beam may be used to establish a new direct link between the first terminal and the second terminal after the direct link beam between the first terminal and the second terminal fails.

[0060] Optionally, in some embodiments, the first channel includes at least one of the following: a physical sidelink feedback channel (PSFCH) carrying relevant information about the failure of the sidelink beam; a new sequence-based physical sidelink beam failure indication channel (PSBFCH); a new type of physical sidelink feedback channel PSFCH.

[0061] Among them, the physical direct link feedback channel PSFCH refers to the existing physical direct link feedback channel PSFCH, which does not carry relevant information about the direct link beam failure, and is different from the new type of physical direct link feedback channel PSFCH.

[0062] Optionally, in some embodiments, the physical direct link feedback channel PSFCH is represented by different time domain resources and / or different frequency domain resources and / or different sequences and / or different cyclic shifts to carry hybrid automatic repeat request acknowledgment (HARQ ACK) information, or carries relevant information about direct link beam failure.

[0063] The sequence may be, for example, a pseudo-random sequence, which is not limited.

[0064] The sequence constitutes the first channel, the first channel is the carrier of the sequence, and the sequence is the content of the first channel.

[0065] That is to say, different time domain resources (time slots or subframes) can be used to indicate that the physical direct link feedback channel PSFCH carries HARQ ACK information, or carries relevant information about the failure of the direct link beam, that is, a specific time slot or subframe can be designated as a time slot or subframe for transmitting HARQ ACK, so that the HARQ ACK information can be detected and decoded based on the specific time slot or subframe, or the relevant information about the failure of the direct link beam can be carried. Alternatively, in the frequency domain, a set of specific frequency domain resource blocks (Resource Block, RB) or subcarriers (Sub Carrier, SC) can be allocated for HARQ ACK transmission, so that the HARQ ACK information can be received and decoded on these frequency domain resources, or the relevant information about the failure of the direct link beam can be carried. Alternatively, different sequences can be used to distinguish and indicate that the PSFCH carries HARQ ACK information, or carries relevant information about the failure of the direct link beam.

[0066] For example, in the embodiments of the present application, Figure 2a As shown, Figure 2a This is a schematic diagram of the time division multiplexing of PSBFCH and PSFCH proposed in one embodiment of the present application. PSBFCH and PSFCH occupy different time domain resources. PSBFCH occupies symbols 9 and 10, and PSFCH occupies symbols 11 and 12, thereby avoiding the failure of the beams used by both parties. In addition, PSBFCH and PSFCH are in the same frequency domain resources.

[0067] In the present application embodiment, Figure 2b As shown, Figure 2b This is a schematic diagram of the code division multiplexing of Type2 PSFCH and PSFCH proposed in an embodiment of the present application, that is, the first terminal sends Type2 PSFCH and PSFCH simultaneously in the 11th symbol and the 12th symbol of a resource block (RB) it occupies. These two types of PSFCH jointly occupy 12 subcarriers of an RB and occupy two time slots, and the 11th symbol and the 12th symbol are completely repeated. At this time, Type2 PSFCH and PSFCH are code-division multiplexed, and they are distinguished by different sequences or different cyclic shift values ​​(Cyclic Shift, CS). On this RB, a sequence of length 12 is placed on its 12 subcarriers, and the cyclic shift value of a sequence includes candidate values ​​such as {1,2,3,6}, so that more PSFCH channels can be accommodated. If different types of PSFCH channels use the same sequence, then CS#1 is used to represent PSFCH and CS#2 is used to represent Type2 PSFCH. If different types of PSFCH channels use different sequences, then sequence #1 is used to represent PSFCH and sequence #2 is used to represent Type2 PSFCH.

[0068] Among them, regarding the frequency domain position of the first channel, there are the following possible candidate schemes: Scheme 1: The frequency domain position of the first channel is preconfigured, that is, its specific frequency domain position is determined by relevant configuration signaling; Scheme 2: The frequency domain position of the first channel is fixed, that is: a section of frequency resources is predefined, which is specifically used to transmit the first channel and will not be used to send other information.

[0069] In an embodiment of the present application, the first terminal sends relevant information about the PSCCH or PSSCH beam failure to the second terminal through the beam failure indication channel, so that the terminal can consider the problem of beam failure in the process of selecting resources of the physical sidelink control channel (Physical Sidelink Control Channel, PSCCH) or the physical sidelink shared channel (Physical Sidelink Shared Channel, PSSCH), thereby reducing the probability of PSCCH or PSSCH transmission failure caused by beam failure and improving the success rate of direct link communication.

[0070] In an embodiment of the present application, a first terminal sends indication information to a second terminal via a first channel, wherein the indication information is used to indicate relevant information of a direct link beam failure, the time domain position of the first channel is related to a first reference time slot, and / or the resources of the first channel are related to a CBD reference signal determined by a candidate beam or are related to a new direct link beam, so that the first terminal can promptly notify the second terminal of the indication information indicating the failure of the direct link beam, so that the second terminal can promptly adopt methods such as changing the beam to avoid data transmission failure and improve the success rate of direct link communication.

[0071] Figure 3 It is a flowchart of a method for indicating direct link beam failure information proposed in another embodiment of the present application.

[0072] like Figure 3 As shown, the method for indicating the direct link beam failure information includes:

[0073] S301: The first terminal repeatedly sends a physical direct link feedback channel PSFCH on two symbols, wherein a first symbol and a second symbol of the two symbols correspond to different beam directions.

[0074] Among them, the beam direction refers to the parameters such as the side link transmission configuration indication (SL TCI) parameter and the quasi-co location (QCL) type, and there is no restriction on this.

[0075] That is to say, the first terminal may divide the physical direct link feedback channel PSFCH into multiple symbols for transmission. In order to improve the transmission effect of the physical direct link feedback channel PSFCH, the first terminal may repeatedly transmit the physical direct link feedback channel PSFCH in two symbols using different beam directions. Since PSFCH is a bidirectional feedback channel and carries indication information for indicating the failure of the direct link beam, it is possible to provide indication information to the second terminal based on PSFCH.

[0076] In an embodiment of the present application, since the first terminal repeatedly sends the physical direct link feedback channel PSFCH on two symbols, that is, different beam directions are used for transmission on the two symbols occupied by PSFCH, the probability of failure of transmission of the physical direct link feedback channel PSFCH is reduced and the success rate of transmission of the physical direct link feedback channel PSFCH is improved.

[0077] Optionally, in some embodiments, sending the physical direct link feedback channel PSFCH may be based on sending the physical direct link feedback channel PSFCH based on the widest beam that can be used by the physical direct link feedback channel PSFCH.

[0078] The widest beam that can be used by the physical direct link feedback channel PSFCH refers to a focused direction beam with the maximum width that can be used by the physical direct link feedback channel PSFCH.

[0079] That is to say, in an embodiment of the present application, the widest beam that can be used for the physical direct link feedback channel PSFCH can be determined first. For example, the widest available beam of the physical direct link feedback channel PSFCH will change with the distance between the transmitting end and the receiving end. Thus, the distance between the first terminal and the second terminal can be determined first, and the widest available beam of the physical direct link feedback channel PSFCH can be determined based on the distance between the first terminal and the second terminal.

[0080] After determining the widest beam that can be used for the physical direct link feedback channel PSFCH, the embodiment of the present application can send the physical direct link feedback channel PSFCH based on the widest beam that can be used for the physical direct link feedback channel PSFCH, thereby improving the transmission efficiency of the physical direct link feedback channel PSFCH.

[0081] Optionally, in some embodiments, sending a physical direct link feedback channel PSFCH may be sending different physical direct link feedback channels PSFCH based on different sending mechanisms, wherein different physical direct link feedback channels PSFCH are used to send hybrid automatic repeat request confirmation HARQ ACK information and hybrid automatic repeat request non-confirmation HARQ NACK information, respectively, and different sending mechanisms have different numbers of repeated symbols and / or beam directions.

[0082] That is to say, in an embodiment of the present application, different physical direct link feedback channels PSFCH can be sent based on different numbers of repeated symbols and / or different beam directions, and different physical direct link feedback channels PSFCH carry hybrid automatic repeat request confirmation HARQ ACK information and hybrid automatic repeat request non-confirmation (Hybrid Automatic Repeat Request Negative Acknowledgement, HARQ NACK) information, so that after the first terminal sends the physical direct link feedback channel PSFCH to the second terminal, the HARQ ACK information and the HARQ NACK information can be synchronously sent to the second terminal, so that the second terminal can obtain the HARQ ACK information and the HARQ NACK information in a timely manner.

[0083] In an embodiment of the present application, the first terminal repeatedly sends the physical direct link feedback channel PSFCH on two symbols, wherein the first symbol and the second symbol of the two symbols correspond to different beam directions, thereby reducing the probability of failure of transmission of the physical direct link feedback channel PSFCH and improving the success rate of transmission of the physical direct link feedback channel PSFCH.

[0084] Figure 4 It is a flowchart of a method for indicating direct link beam failure information proposed in another embodiment of the present application.

[0085] like Figure 4 As shown, the method for indicating the direct link beam failure information includes:

[0086] S401: The first terminal repeatedly sends a physical direct link beam failure indication channel PSBFCH on N symbols, where N symbols correspond to M beam directions, N and M are integers greater than 1, and M is less than or equal to N.

[0087] In an embodiment of the present application, the physical direct link beam failure indication channel PSBFCH may carry second information for indicating the existence of a direct link beam failure.

[0088] That is to say, in an embodiment of the present application, the first terminal may repeatedly send a physical direct link beam failure indication channel PSBFCH to the second terminal on N symbols to provide the second terminal with indication information indicating the existence of a direct link beam failure, and the PSBFCH and PSFCH are configured independently of each other.

[0089] Among them, the physical direct link feedback channel PSFCH refers to the existing physical direct link feedback channel PSFCH, which does not carry relevant information about the direct link beam failure, and is different from the new type of physical direct link feedback channel PSFCH.

[0090] For example, Figure 5 As shown, Figure 5 This is a beam diagram used by the first channel proposed in an embodiment of the present application. The first terminal can repeatedly send the physical direct link beam failure indication channel PSBFCH on 3 symbols (symbol No. 11, symbol No. 12 and symbol No. 13). The 3 symbols correspond to 3 beam directions (beam 1, beam 2 and beam 3). In this way, it can effectively prevent the failure of PSBFCH transmission in a certain beam direction and improve the success rate of PSBFCH transmission.

[0091] Optionally, in some embodiments, sending the Physical Direct Link Beam Failure Indication Channel PSBFCH may be based on sending the Physical Direct Link Beam Failure Indication Channel PSBFCH based on the widest beam that can be used by the Physical Direct Link Beam Failure Indication Channel PSBFCH.

[0092] The widest beam that can be used by the physical direct link beam failure indication channel PSBFCH refers to the focal direction beam with the maximum width that can be used by the physical direct link beam failure indication channel PSBFCH.

[0093] That is to say, in an embodiment of the present application, the widest beam that can be used by the physical direct link beam failure indication channel PSBFCH can be determined first. For example, the widest available beam of the physical direct link beam failure indication channel PSBFCH will change with the distance between the transmitting end and the receiving end. Thus, the distance between the first terminal and the second terminal can be determined first, and the widest beam that can be used by the physical direct link beam failure indication channel PSBFCH can be determined based on the distance between the first terminal and the second terminal.

[0094] After determining the widest beam that can be used for the physical direct link beam failure indication channel PSBFCH, the embodiment of the present application can send the physical direct link beam failure indication channel PSBFCH based on the widest beam that can be used for the physical direct link beam failure indication channel PSBFCH, thereby improving the transmission efficiency of the physical direct link beam failure indication channel PSBFCH.

[0095] In an embodiment of the present application, the first terminal repeatedly sends a physical direct link beam failure indication channel PSBFCH on N symbols, where N symbols correspond to M beam directions, N and M are integers greater than 1, and M is less than or equal to N. In this way, it is possible to effectively prevent the failure of PSBFCH transmission in a certain beam direction and improve the success rate of PSBFCH transmission.

[0096] Figure 6 It is a flowchart of a method for indicating direct link beam failure information proposed in another embodiment of the present application.

[0097] like Figure 6 As shown, the method for indicating the direct link beam failure information includes:

[0098] S601: The first terminal sends a first channel through a preset period.

[0099] Among them, the preset sending period of the first terminal sending the first channel is the preset period, and the preset period can be configured through the direct link control information (Sidelink Control Information, SCI) or radio resource control (Radio Resource Control, RRC) signaling. The RRC signaling includes the radio resource control (Proximity Communication Port 5 Radio Resource Control, PC5 RRC) signaling of the close range communication port 5 or the new air interface radio resource control instruction (New Radio Uu Radio Resource Control, NR Uu RRC) signaling. If the preset period of the first channel configured by the terminal is configured through the PC5 RRC signaling, if the preset period of the first channel of the first terminal is configured by the base station, it is configured through the NR Uu RRC signaling.

[0100] That is to say, in an embodiment of the present application, the first terminal can send the first channel through a preset period, so that the first terminal can promptly send the indication information to the second terminal, so that the second terminal can promptly discover and handle the failure of the direct link beam based on the indication information sent periodically.

[0101] In the embodiment of the present application, the preset period is any one of 1 time slot, 2 time slots, and 4 time slots.

[0102] That is to say, in the embodiment of the present application, the preset period can be set to 1 time slot, or 2 time slots, or 4 time slots in combination with the indication requirement of the specific direct link beam failure information to adapt to different communication environments and performance requirements. When the preset period is set to any one of 1 time slot, 2 time slots, or 4 time slots, a smaller period value can provide higher real-time performance. When the message or indication information needs to be delivered quickly and responded to in time, a smaller period value can shorten the response time between the first terminal and the second terminal, thereby improving the real-time performance of the indication information transmission, and a smaller period value can avoid or reduce the first channel transmission conflicts of different terminals.

[0103] In an embodiment of the present application, the first terminal sends the first channel through a preset period. Since the first channel carries relevant indication information for indicating the failure of the direct link beam, the first terminal can promptly send the indication information to the second terminal, so that the second terminal can promptly discover and handle the failure of the direct link beam based on the indication information sent periodically.

[0104] Figure 7 It is a flowchart of a method for indicating direct link beam failure information proposed in another embodiment of the present application.

[0105] like Figure 7 As shown, the method for indicating the direct link beam failure information includes:

[0106] S701: The first terminal sends indication information to the second terminal through the first channel, wherein the indication information is used to indicate relevant information about the failure of the direct link beam, the time domain position of the first channel is related to the first reference time slot, and / or the resources of the first channel are related to the CBD reference signal determined by the candidate beam or are related to a new direct link beam.

[0107] The specific description of S701 can be found in the above embodiment, which will not be repeated here.

[0108] S702: Determine whether the first channel is configured in the resource pool based on an enable switch parameter of related information of direct link beam failure in direct link control information SCI or radio resource control RRC signaling, wherein whether the first channel is configured in the resource pool is used to determine whether to send the first channel.

[0109] Among them, RRC signaling includes PC5 RRC signaling or NR Uu RRC signaling.

[0110] In an embodiment of the present application, the first terminal may determine an enable switch parameter for determining whether the first channel is configured in the resource pool from relevant information of the direct link beam failure in the direct link control information SCI or the wireless resource control RRC signaling, and check the current configuration status of the enable switch parameter to determine whether the enable switch parameter related to the first channel configuration is in an on or enabled state, and after determining that the enable switch parameter related to the first channel configuration is in an on or enabled state, determine that the first channel is configured in the resource pool, and when it is determined that the enable switch parameter related to the first channel configuration is in a off state, determine that the first channel is not configured in the resource pool.

[0111] Whether the first channel is configured in the resource pool is used to determine whether to send the first channel.

[0112] That is to say, in an embodiment of the present application, when it is determined that the first channel is configured in the resource pool based on the enable switch parameters of the related information of the direct link beam failure in the direct link control information SCI or the wireless resource control RRC signaling, it is determined that the first terminal has sent the first channel; when it is determined that the first channel is not configured in the resource pool, it is determined that the first terminal has not sent the first channel. Therefore, by judging whether the first channel is configured in the resource pool, the sending status of the first channel can be accurately known.

[0113] In an embodiment of the present application, a first terminal sends indication information to a second terminal via a first channel, wherein the indication information is used to indicate relevant information of a direct link beam failure, the time domain position of the first channel is related to the first reference time slot, and / or the resources of the first channel are related to a CBD reference signal determined by a candidate beam or are related to a new direct link beam, so that the second terminal can use a new beam for communication in the direct link, thereby reducing the probability of PSCCH or PSSCH transmission failure caused by beam failure, and improving the success rate of direct link communication, and then determining whether the first channel is configured in the resource pool based on an enable switch parameter of the relevant information of the direct link beam failure in the direct link control information SCI or the wireless resource control RRC signaling, wherein whether the first channel is configured in the resource pool is used to determine whether to send the first channel, thereby accurately knowing the sending status of the first channel by judging whether the first channel is configured in the resource pool.

[0114] Figure 8 It is a flowchart of a method for indicating direct link beam failure information proposed in another embodiment of the present application.

[0115] like Figure 8 As shown, the method for indicating the direct link beam failure information includes:

[0116] S801: Determine that a direct link beam failure occurs in a physical direct link control channel PSCCH or a physical direct link shared channel PSSCH transmission.

[0117] Optionally, in some embodiments, determining that a direct link beam failure occurs in a physical direct link control channel PSCCH or a physical direct link shared channel PSSCH transmission can be based on non-acknowledgement HARQ NACK information or a reference signal measurement report of a hybrid automatic repeat request of the direct link to determine that a direct link beam failure occurs in a physical direct link control channel PSCCH or a physical direct link shared channel PSSCH transmission.

[0118] Optionally, in some embodiments, based on the non-acknowledgement HARQ NACK information of the hybrid automatic repeat request of the direct link or the reference signal measurement report, it is determined that a direct link beam failure occurs in the physical direct link control channel PSCCH or the physical direct link shared channel PSSCH transmission. It can be determined that a direct link beam failure occurs in the physical direct link control channel PSCCH or the physical direct link shared channel PSSCH transmission when the count number of beam failure instances (Beam FailureInstance, BFI) of the direct link reaches a preset threshold.

[0119] The counting of beam failure instances BFI of the through link is triggered by a reference signal measurement report or consecutively received non-acknowledgement HARQ NACK information of N hybrid automatic repeat requests, where N is a positive integer.

[0120] That is to say, in an embodiment of the present application, when the signal strength, signal-to-noise ratio and other beam-related measurement parameters described in the reference signal measurement report do not meet the parameter threshold, the counting of beam failure instances BFI of the direct link may be triggered to determine the count number of BFIs.

[0121] Alternatively, in an embodiment of the present application, when N non-confirmation HARQ NACK information of hybrid automatic repeat requests is received continuously and it is determined that N is greater than or equal to a quantity threshold, the counting of beam failure instances BFI of the direct link is triggered to determine the count number of BFIs.

[0122] In an embodiment of the present application, when the count number of beam failure instances (Beam Failure Instance, BFI) of the direct link reaches a preset threshold, it can be determined that a direct link beam failure occurs in the physical direct link control channel PSCCH or the physical direct link shared channel PSSCH transmission.

[0123] Optionally, in some embodiments, when the count number of beam failure instances BFI of the direct link reaches a preset threshold, it is determined that a direct link beam failure occurs in the physical direct link control channel PSCCH or the physical direct link shared channel PSSCH transmission. It can be that when the non-confirmation HARQ NACK information feedback of the reference signal measurement report or the hybrid automatic repeat request meets the conditions, it triggers the sending of the beam failure instance BFI of the direct link to the direct link media access control SL MAC layer. When the direct link media access control SL MAC layer receives the beam failure instance BFI of the direct link, it starts counting to obtain the count number of beam failure instances BFI of the direct link. When the count number reaches the preset threshold, the direct link media access control SL MAC layer determines that a direct link beam failure occurs.

[0124] That is to say, in an embodiment of the present application, when the reference signal measurement report indicates that the signal quality or RSRP of the reference channel satisfies a certain threshold condition, it is determined that the reference signal measurement report satisfies the condition, or when the number of continuously received HARQ NACK information satisfies the quantity threshold, it is determined that the HARQ NACK information feedback satisfies the condition. At this time, a trigger is sent to the direct link media access control (Side Link Media Access Control, SL MAC) layer to send a beam failure instance BFI of the direct link. When the direct link media access control SL MAC layer receives the beam failure instance BFI of the direct link, it starts counting and increments each BFI counter by 1 to obtain the count number of BFIs. When the count number reaches the preset threshold, the SL MAC layer determines that a direct link beam failure has occurred.

[0125] In the embodiment of the present application, by determining that a direct link beam failure occurs in the transmission of a physical direct link control channel PSCCH or a physical direct link shared channel PSSCH, the beam failure can be detected and processed in a timely manner, thereby ensuring that the transmission quality is always maintained at a high level, providing a good user experience, and releasing the wireless resources occupied by the original direct link beam so that it can be used by other user devices, thereby optimizing system resource utilization.

[0126] S802: The first terminal sends indication information to the second terminal through the first channel, wherein the indication information is used to indicate relevant information about the failure of the direct link beam, the time domain position of the first channel is related to the first reference time slot, and / or the resources of the first channel are related to the CBD reference signal determined by the candidate beam or are related to a new direct link beam.

[0127] The specific description of S802 can be found in the above embodiment, which will not be repeated here.

[0128] In an embodiment of the present application, by determining that a direct link beam failure occurs in the transmission of a physical direct link control channel PSCCH or a physical direct link shared channel PSSCH, the direct link beam failure can be detected and processed in a timely manner, and the transmission quality can be ensured to always remain at a high level, providing a good user experience. The wireless resources occupied by the original direct link beam can also be released so that they can be used by other user devices, thereby optimizing system resource utilization, and sending indication information to the second terminal through the first channel, wherein the indication information is used to indicate relevant information of the direct link beam failure, the time domain position of the first channel is related to the first reference time slot, and / or the resources of the first channel are related to the candidate beam determination CBD reference signal or to the new direct link beam. Thus, the first terminal can promptly notify the second terminal of the indication information indicating the direct link beam failure, so that the second terminal can promptly take methods such as changing the beam to avoid data transmission failure and improve the success rate of direct link communication.

[0129] Fig. 9 It is a flowchart of a method for indicating direct link beam failure information proposed in another embodiment of the present application.

[0130] like Fig. 9 As shown, the method for indicating the direct link beam failure information includes:

[0131] S901: The first terminal sends indication information to the second terminal through the first channel, wherein the indication information is used to indicate relevant information about the failure of the direct link beam, the time domain position of the first channel is related to the first reference time slot, and / or the resources of the first channel are related to the CBD reference signal determined by the candidate beam or are related to a new direct link beam.

[0132] The specific description of S901 can be found in the above embodiment, which will not be repeated here.

[0133] S902: Determine the time domain position of the first channel.

[0134] In an embodiment of the present application, determining the time domain position of the first channel can help identify the time when the direct link beam failure event occurs, thereby facilitating taking corresponding measures to repair the direct link beam failure.

[0135] Optionally, in some embodiments, determining the time domain position of the first channel may be to determine the first time slot containing a physical direct link feedback channel PSFCH resource as the time domain position of the first channel, wherein the first time slot is located in a time slot that is at least N1 time slots after the first reference time slot, and N1 is an integer greater than or equal to 1.

[0136] That is to say, in an embodiment of the present application, the first terminal sends the first channel in the first time slot containing the PSFCH resource, and the first time slot is located in a time slot that is at least N1 time slots after the first reference time slot, where N1 is configured by parameters, or N1 is notified to the first terminal by the second terminal through signaling.

[0137] That is to say, in the embodiment of the present application, the first time slot containing the physical direct link feedback channel PSFCH resources can be determined, and the first time slot containing the physical direct link feedback channel PSFCH resources can be determined as the time domain position of the first channel.

[0138] For example, Fig.10a As shown, Fig.10a It is a schematic diagram of a method for determining the time slot occupied by the first channel proposed in an embodiment of the present application, that is, the first terminal receives BFI on the time slot No. 3 of subchannel No. 1, and the BFI indicates that a beam failure has occurred in the transmission of PSCCH or PSSCH. In this way, the first terminal needs to determine the time slot occupied by the first channel and send the first channel to the second terminal to avoid the failure of direct link communication. Assuming N1 = 2 time slots, the period of PSFCH is 2 time slots, then the time slots containing PSFCH resources include even time slots such as 2, 4, 6, and 8. Since terminal A received BFI in time slot No. 3, the first reference time slot (the time slot where the beam failure instance BFI is located) is time slot No. 3, and N1 = 2 time slots, then terminal A needs to send the first channel in the first time slot containing PSFCH resources after time slot No. 5 (time slot No. 3 + N1), and the first time slot is time slot No. 6.

[0139] In the embodiment of the present application, the time domain position of the first channel is related to the time domain position of the BFI used to indicate the failure of the target PSCCH or PSSCH beam, which is direct and effective.

[0140] Optionally, in some embodiments, determining the time domain position of the first channel may be determining a time slot that is N2 time slots after the first reference time slot as the time domain position of the first channel, where N2 is an integer greater than or equal to 1.

[0141] That is to say, in an embodiment of the present application, the first terminal can send a direct link beam failure message via the first channel resource in the first time slot, and the first time slot is N2 time slots after the first reference time slot, where N2 is configured by parameters, or N2 is notified to the first terminal by the second terminal through signaling.

[0142] That is to say, in the embodiment of the present application, the time slot that is N2 time slots after the first reference time slot may be determined first, and the time slot that is N2 time slots after the first reference time slot may be determined as the time domain position of the first channel.

[0143] For example, Fig.10b As shown, Fig.10b This is a schematic diagram of a method for determining the time slot occupied by the first channel proposed in another embodiment of the present application, that is, the first reference time slot is the time slot where the PSCCH or PSSCH beam fails. The first terminal has a PSCCH or PSSCH beam failure in the 3rd time slot of the 2nd subchannel. The first reference time slot is the 3rd time slot, and N2=3. In this way, the first terminal sends the beam failure information to the second terminal in the 6th time slot of the 4th subchannel through the first channel. The second terminal will change the beam to avoid the failure of PSCCH or PSSCH transmission. Fig.10b In the beam failure situation shown, the first terminal sends the first channel in the first time slot X2, which is N2=3 time slots after the time slot of beam failure.

[0144] In the embodiment of the present application, by adopting this method for determining the time slot occupied by the first channel, the time domain position of the first channel is directly and effectively related to the time domain position of the beam failure of the target PSCCH or PSSCH.

[0145] Optionally, in some embodiments, determining the time domain position of the first channel may be to determine the time domain position of the first channel as the time domain position of the first channel at the time slot where the nearest physical direct link feedback channel PSFCH opportunity is located after the first reference time slot.

[0146] For example, Fig.10c As shown, Fig.10c It is a schematic diagram of a method for determining the time slot occupied by the first channel proposed in another embodiment of the present application, that is, the first reference time slot is the time slot for candidate beam determination. The second terminal had a beam failure before, and completed the candidate beam determination on the 3rd time slot of subchannel No. 2. The first terminal periodically sends PSFCH on subchannel No. 4, as shown by the black square in the figure. The first terminal sends a beam failure message via the first channel resource in the first time slot. The first time slot is the time slot where the nearest PSFCH opportunity after the first reference time slot is located. In this way, the first terminal sends the PSCCH or PSSCH beam failure information on the first channel in the 4th time slot of subchannel No. 4 to the second terminal, and the second terminal will perform a PSCCH or PSSCH beam replacement to avoid PSCCH or PSSCH transmission failure.

[0147] In the embodiment of the present application, by adopting this method for determining the time slot occupied by the first channel, the time domain position of the first channel is related to the time slot determined by the PSCCH or PSSCH candidate beam, which is direct and effective.

[0148] Optionally, in some embodiments, determining the time domain position of the first channel may be determining the K+n or Kn time slot as the time domain position of the first channel, wherein the nearest physical direct link feedback channel PSFCH opportunity after the first reference time slot is located in the Kth time slot, and n is an integer greater than or equal to 1.

[0149] That is to say, in an embodiment of the present application, the time domain position of the first channel transmission is determined as follows: the first terminal sends a direct link beam failure message via the first channel resource in the first time slot. If the most recent PSFCH opportunity after the first reference time slot is in the K time slot, then the first channel resource will be located in the K+n or Kn time slot, where n is an integer greater than or equal to 1.

[0150] For example, Fig.10d As shown, Fig.10d This is a schematic diagram of a method for determining the time slot occupied by the first channel proposed in another embodiment of the present application, that is, the first reference time slot is the time slot where the PSCCH or PSSCH beam fails, and the second terminal has a beam failure in time slot 3 of subchannel 2. The first terminal periodically sends PSFCH on subchannel 4, as shown by the black square in the figure. The first terminal sends a beam failure message via the first channel resource in the first time slot. If the nearest PSFCH opportunity after the time slot where the beam failure occurs is in the K time slot, then the first channel resource will be in the K+n time slot. Assuming n=1, the first terminal will send the PSCCH or PSSCH beam failure information to the second terminal by sending the first channel in time slot 5 of subchannel 4. The second terminal will then replace the PSCCH or PSSCH beam to avoid PSCCH or PSSCH transmission failure.

[0151] In the embodiment of the present application, by adopting the method for determining the time slot occupied by the first channel, the time domain position of the first channel is directly and effectively related to the time domain position of the target PSCCH or PSSCH beam failure, and is associated with the PSFCH, avoiding the problem of collision with the PSFCH.

[0152] Optionally, in some embodiments, the minimum time interval between the time domain position of the first channel and the first reference time slot is Y time slots, where Y represents the processing delay budget of the first terminal.

[0153] The first terminal processing delay budget Y refers to the maximum time required to complete processing after receiving data.

[0154] That is to say, in the embodiment of the present application, the processing delay budget Y of the first terminal may be determined, and the time slot sum value between the processing delay budget Y and the first reference time slot may be used as the time domain position of the first channel.

[0155] For example, refer to Fig.10e as shown Fig.10e which is a schematic diagram of the minimum time interval between the time slots occupied by the first channel and the first reference time slot proposed in an embodiment of the present application. That is, if all the time slots of the first channel are determined as the first time slots according to the technical solution in the above embodiment, and the time interval between the first time slots and the first reference time slot is S, and S < Y, then it is necessary to re-determine the first time slots according to the technical solution in the embodiment, so as to satisfy S ≥ Y. The reason for doing this is that if the first time slots are too close to the first reference time slot, after receiving the first channel sent by terminal A in the first time slots, terminal B may not have enough time to process the beam failure information carried in the first channel and change the beam, resulting in the failure of PSCCH or PSSCH transmission.

[0156] Taking the Fig.10c shown embodiment as an example, assume Y = 2 time slots. Then, according to the technical solution in the embodiment shown Fig.10c the first time slots are determined as X2. However, the time interval between X2 (the 4th time slot) and the first reference time slot (the 3rd time slot) is S = 1 time slot, so S < Y. In this way, it is necessary to re-determine the first time slots according to the technical solution in the embodiment shown Fig.10c so that the first time slots are selected as X3. At this time, S = 3 time slots, thus satisfying S ≥ Y.

[0157] In the embodiment of the present application, by restricting the minimum time interval between the time slots for sending the first channel and the first reference time slot to be Y time slots, the problem that terminal B does not have enough time to process after receiving the first channel, thus affecting the transmission effect of beam failure information, is avoided.

[0158] In the embodiment of the present application, the first terminal sends indication information to the second terminal through the first channel, where the indication information is used to indicate the relevant information of the direct link beam failure. The time domain position of the first channel is related to the first reference time slot, and / or the resources of the first channel are related to the candidate beam determination CBD reference signal or related to the new direct link beam, and determining the time domain position of the first channel can help identify the time when the direct link beam failure event occurs, so as to facilitate taking corresponding measures to repair the direct link beam failure.

[0159] Fig.11 which is a schematic flowchart of the method for indicating direct link beam failure information proposed in another embodiment of the present application.

[0160] As Fig.11 shown, the method for indicating direct link beam failure information includes:

[0161] S1101: The first terminal sends indication information to the second terminal via the first channel, wherein the indication information is used to indicate relevant information about the failure of a direct link beam, the time domain position of the first channel is related to a first reference time slot, and / or the resources of the first channel are related to a CBD reference signal determined by a candidate beam or are related to a new direct link beam.

[0162] The specific description of S1101 can be found in the above embodiment, which will not be repeated here.

[0163] S1102: The first terminal determines a CBD reference signal or a new direct link beam according to the candidate beams, and determines resources of the first channel.

[0164] That is to say, in an embodiment of the present application, the first terminal can send relevant information about the failure of the direct link beam via the first channel resource, and determine the first channel resource based on the CBD reference signal or the new direct link beam, so that the CBD reference signal or the new direct link beam information is mapped one-to-one with the first channel resource, that is: one first channel resource uniquely corresponds to one CBD reference signal or a new direct link beam.

[0165] Specifically, this is an implicit indication method. A one-to-one mapping relationship is established in advance between the first channel resources and the CBD reference signal or the new direct link beam, so that the first terminal can obtain the new direct link beam through the resources of the first channel. For example: the CBD reference signal is SL CSI-RS, there are 8 SL CSI-RS, which are mapped one-to-one to the resource positions of 8 PSFCHs, that is: SL CSI-RS No. 1 corresponds to PSFCH No. 1, SL CSI-RS No. 2 corresponds to PSFCH No. 2, and so on. SL CSI-RS No. 1 also corresponds to direct link beam No. 1. Therefore, if the first terminal uses PSFCH No. 1 to send the first channel, it means that the new direct link beam is direct link beam No. 1.

[0166] In an embodiment of the present application, the resources of the first channel are related to the candidate beam determination reference signal or to the new direct link beam, which is an implicit indication method and saves the overhead of signaling indication.

[0167] Optionally, in some embodiments, the number of resource blocks RBs in the candidate resource set of the first channel in the first resource pool is an integer multiple of the product of the number of sub-channels included in the first resource pool and the resource period value of the first channel.

[0168] In the embodiment of the present application, the number of RBs in the candidate resource set of the first channel in a resource pool is determined in the above manner, so as to ensure that there are sufficient resources for sending the first channel.

[0169] For example, Fig.12 As shown, Fig.12 Schematic diagram of a method for determining a candidate resource set of a channel proposed in an embodiment of the present application, that is, Fig.12 As shown in the resource pool, the number of sub-channels Q=4, and the first channel resource period value P=2, then the number of RBs in the candidate resource set of the first channel in the resource pool is an integer multiple of 8.

[0170] Optionally, in some embodiments, determining the set of candidate resources for the first channel can be based on mapping the first channel candidate resources based on the time slot number of the physical direct link control channel PSCCH or the physical direct link shared channel PSSCH associated with the first channel, and the number of the starting subchannel occupied by the physical direct link control channel PSCCH or the physical direct link shared channel PSSCH transmission.

[0171] That is to say, in an embodiment of the present application, the first channel candidate resources are mapped based on the time slot number of the PSCCH or PSSCH associated with the first channel and the number of the starting subchannel occupied by the PSCCH or PSSCH transmission. Since only the starting subchannel number occupied by the PSCCH or PSSCH is involved, there are fewer available candidate resources for the first channel that can be mapped.

[0172] Optionally, in some embodiments, determining the set of candidate resources for the first channel can be based on mapping the first channel candidate resources based on the time slot number of the physical direct link control channel PSCCH or the physical direct link shared channel PSSCH associated with the first channel, and the numbers of all subchannels occupied by the physical direct link control channel PSCCH or the physical direct link shared channel PSSCH transmission.

[0173] That is to say, in an embodiment of the present application, the first channel candidate resources are mapped based on the time slot number of the PSCCH or PSSCH associated with the first channel and the numbers of all sub-channels occupied by the PSCCH or PSSCH transmission. Since all sub-channel numbers occupied by the PSCCH or PSSCH are involved, there are more available candidate resources for the first channel that can be mapped.

[0174] In an embodiment of the present application, by mapping the first channel candidate resources based on the time slot number of the physical direct link control channel PSCCH or the physical direct link shared channel PSSCH associated with the first channel, and the number of the starting subchannel occupied by the physical direct link control channel PSCCH or the physical direct link shared channel PSSCH transmission, or mapping the first channel candidate resources based on the time slot number of the physical direct link control channel PSCCH or the physical direct link shared channel PSSCH associated with the first channel, and the numbers of all subchannels occupied by the physical direct link control channel PSCCH or the physical direct link shared channel PSSCH transmission, it is possible to facilitate the first terminal to determine the candidate resource set used by the first channel, thereby avoiding the problem of resource collision when the terminal selects the first channel transmission resource.

[0175] In an embodiment of the present application, a first terminal sends indication information to a second terminal via a first channel, wherein the indication information is used to indicate relevant information about a failure of a direct link beam, a time domain position of the first channel is related to a first reference time slot, and / or resources of the first channel are related to a CBD reference signal determined by a candidate beam or are related to a new direct link beam, and then the CBD reference signal or a new direct link beam is determined based on the candidate beam to determine the resources of the first channel, thereby enabling an implicit indication method to determine the resources of the first channel and saving the overhead of signaling indications.

[0176] Fig.13 It is a flowchart of a method for indicating direct link beam failure information proposed in an embodiment of the present application.

[0177] It should be noted that the executor of the method for indicating direct link beam failure information in this embodiment is a device for indicating direct link beam failure information, which can be implemented by software and / or hardware, and can be configured in a network device without limitation.

[0178] S1301: The second terminal receives indication information sent by the first terminal through the first channel, wherein the indication information is used to indicate relevant information about the failure of the direct link beam, the time domain position of the first channel is related to the first reference time slot, and / or the resources of the first channel are related to the candidate beam determination CBD reference signal or are related to a new direct link beam.

[0179] Among them, in the initial beam pairing stage of the direct link beam, the beam alignment is completed between the transmitting terminal and the receiving terminal. However, since the terminal may be in motion and new obstructions may appear between the transmitting terminal and the receiving terminal, the receiving terminal may not be able to receive the direct link beam sent by the transmitting terminal. At this time, a direct link beam failure will occur, which will lead to a failure of direct link data transmission or a low transmission rate. In this case, the receiving terminal needs to notify the transmitting terminal of relevant information about the direct link beam failure, so that the sending terminal can take methods such as changing the beam to avoid data transmission failure.

[0180] The first terminal is a receiving terminal, and the second terminal is a sending terminal.

[0181] The first channel may be used by the first terminal to transmit indication information to the second terminal.

[0182] The indication information is used to indicate relevant information of the failure of the direct link beam.

[0183] Optionally, in some embodiments, the relevant information of the direct link beam failure includes at least one of the following: new direct link beam information; first information, wherein the first information is used to indicate whether there is a direct link beam failure; second information, wherein the second information is used to indicate the existence of a direct link beam failure.

[0184] The new through link beam information may specifically include: a new through link beam pointing direction, a new through link beam shape, a new through link beam weight, etc., and there is no limitation on this.

[0185] That is to say, in an embodiment of the present application, the first terminal sends relevant information indicating a direct link beam failure to the second terminal through the first channel, so that the second terminal can use a new beam to communicate in the direct link based on the new direct link beam information in the relevant information of the direct link beam failure, and / or the second terminal can promptly know whether there is a direct link beam failure based on the first information in the relevant information of the direct link beam failure, and / or the second terminal can promptly know whether there is a direct link beam failure based on the second information in the relevant information of the direct link beam failure, so that the second terminal can promptly take methods such as changing the beam to avoid data transmission failure.

[0186] The time domain position of the first channel is related to the first reference time slot, and / or the resources of the first channel are related to a candidate beam determination (CBD) reference signal or to a new direct link beam.

[0187] A certain time is usually divided into multiple time slots, each of which has a fixed duration. Different devices or users can transmit and receive signals in different time slots to avoid conflicts and interferences with each other.

[0188] Optionally, in some embodiments, the first reference time slot includes at least one of the following: a time slot where a beam failure occurs; a time slot where a beam failure is determined by the first terminal; a time slot where a beam failure instance (Beam Failure Instance, BFI) is located, and a time slot where a candidate beam determination (Candidate Beam Determination, CBD) is located.

[0189] The resources of the first channel may be, for example: the time slot occupied by the first channel, the number of resource blocks (Resource Block, RB) occupied by the first channel, and there is no limitation on this.

[0190] Among them, the candidate beam determination (CBD) reference signal can be used for channel estimation and beam selection in the candidate beam determination (CBD) process.

[0191] The new direct link beam may be used to establish a new direct link between the first terminal and the second terminal after the direct link beam between the first terminal and the second terminal fails.

[0192] Optionally, in some embodiments, the first channel includes at least one of the following: a physical sidelink feedback channel (PSFCH) carrying relevant information about the failure of the sidelink beam; a new sequence-based physical sidelink beam failure indication channel (PSBFCH); a new type of physical sidelink feedback channel PSFCH.

[0193] In an embodiment of the present application, a second terminal receives indication information sent by a first terminal through a first channel, wherein the indication information is used to indicate relevant information of a direct link beam failure, the time domain position of the first channel is related to a first reference time slot, and / or the resources of the first channel are related to a CBD reference signal determined by a candidate beam or are related to a new direct link beam. Thus, the second terminal can promptly obtain the indication information indicating the failure of the direct link beam, so that the second terminal can adopt methods such as changing the beam based on the indication information to avoid data transmission failure and improve the success rate of direct link communication.

[0194] Fig.14 It is a structural diagram of a device for indicating direct link beam failure information proposed in one embodiment of the present application.

[0195] like Fig.14 As shown, the indication device 140 of the direct link beam failure information includes:

[0196] The sending unit 1401 is used to control the first terminal to send indication information to the second terminal through the first channel, wherein the indication information is used to indicate relevant information about the failure of the direct link beam, the time domain position of the first channel is related to the first reference time slot, and / or the resources of the first channel are related to the candidate beam determination CBD reference signal or are related to a new direct link beam.

[0197] In some embodiments of the present application, it is characterized in that the relevant information of the through link beam failure includes at least one of the following:

[0198] New through link beam information;

[0199] first information, wherein the first information is used to indicate whether there is a direct link beam failure;

[0200] Second information, wherein the second information is used to indicate the existence of a direct link beam failure.

[0201] In some embodiments of the present application, it is characterized in that the first reference time slot includes at least one of the following:

[0202] The time slot when beam failure occurs;

[0203] A time slot in which a beam fails, determined by the first terminal;

[0204] The time slot where the beam failure instance BFI is located;

[0205] The candidate beam determines the time slot where the CBD is located.

[0206] In some embodiments of the present application, it is characterized in that the first channel includes at least one of the following:

[0207] Physical direct link feedback channel PSFCH carrying information related to direct link beam failure;

[0208] New sequence-based Physical Direct Link Beam Failure Indicator Channel PSBFCH;

[0209] A new type of physical direct link feedback channel PSFCH.

[0210] In some embodiments of the present application, it is characterized in that the physical direct link feedback channel PSFCH carries hybrid automatic repeat request confirmation HARQ ACK information, or carries relevant information of direct link beam failure, represented by different time domain resources and / or different frequency domain resources and / or different sequences and / or different cyclic shifts.

[0211] In some embodiments of the present application, the sending unit 1401 is further configured to:

[0212] Controlling the first terminal to repeatedly send a physical direct link feedback channel PSFCH on two symbols, wherein a first symbol and a second symbol of the two symbols correspond to different beam directions; or

[0213] Control the first terminal to repeatedly send a physical direct link beam failure indication channel PSBFCH on N symbols, where the N symbols correspond to M beam directions, N and M are integers greater than 1 respectively, and M is less than or equal to N.

[0214] In some embodiments of the present application, the sending unit 1401 is further configured to:

[0215] The first terminal is controlled to transmit the physical direct link feedback channel PSFCH based on the widest beam that can be used by the physical direct link feedback channel PSFCH.

[0216] In some embodiments of the present application, the sending unit 1401 is further configured to:

[0217] Control the first terminal to send different physical direct link feedback channels PSFCH based on different sending mechanisms, wherein different physical direct link feedback channels PSFCH are used to send hybrid automatic repeat request confirmation HARQ ACK information and hybrid automatic repeat request non-confirmation HARQ NACK information, respectively, and different sending mechanisms have different numbers of repeated symbols and / or beam directions.

[0218] In some embodiments of the present application, the sending unit 1401 is further configured to:

[0219] The first terminal is controlled to send a physical direct link beam failure indication channel PSBFCH based on the widest beam that can be used by the physical direct link beam failure indication channel PSBFCH.

[0220] In some embodiments of the present application, the sending unit 1401 is further configured to:

[0221] Controlling the first terminal to send the first channel through a preset period;

[0222] The preset period is any one of 1 time slot, 2 time slots, and 4 time slots.

[0223] In some embodiments of the present application, it is characterized in that the indication device 140 of the direct link beam failure information further includes:

[0224] The first determination unit is used to determine whether the first channel is configured in the resource pool based on the enable switch parameter of the relevant information of the direct link beam failure in the direct link control information SCI or the radio resource control RRC signaling, wherein whether the first channel is configured in the resource pool is used to determine whether to send the first channel.

[0225] In some embodiments of the present application, it is characterized in that the indication device 140 of the direct link beam failure information further includes:

[0226] The second determining unit is used to determine whether a direct link beam failure occurs in the transmission of a physical direct link control channel PSCCH or a physical direct link shared channel PSSCH.

[0227] In some embodiments of the present application, it is characterized in that the second determining unit is further used to:

[0228] Based on the non-acknowledgement HARQ NACK information of the hybrid automatic repeat request of the direct link or the reference signal measurement report, it is determined that a direct link beam failure occurs in the physical direct link control channel PSCCH or the physical direct link shared channel PSSCH transmission.

[0229] In some embodiments of the present application, the second determining unit is further configured to:

[0230] When the count number of beam failure instances BFI of the direct link reaches a preset threshold, it is determined that a direct link beam failure occurs in the physical direct link control channel PSCCH or the physical direct link shared channel PSSCH transmission; wherein the count of beam failure instances BFI of the direct link is triggered by a reference signal measurement report or consecutively received non-acknowledgement HARQ NACK information of N hybrid automatic repeat requests.

[0231] In some embodiments of the present application, the second determining unit is further configured to:

[0232] When the reference signal measurement report or the non-confirmation HARQ NACK information feedback of the hybrid automatic repeat request meets the conditions, it triggers the sending of the beam failure instance BFI of the direct link to the direct link media access control SL MAC layer;

[0233] The through link media access control SL MAC layer starts counting when receiving the beam failure instance BFI of the through link, and obtains the count number of the beam failure instance BFI of the through link;

[0234] When the counted number reaches a preset threshold, the through link media access control SL MAC layer determines that a through link beam failure occurs.

[0235] In some embodiments of the present application, determining the time domain position of the first channel includes any of the following:

[0236] Determine the first time slot containing the physical direct link feedback channel PSFCH resource as the time domain position of the first channel, wherein the first time slot is located in a time slot that is at least N1 time slots after the first reference time slot, where N1 is an integer greater than or equal to 1;

[0237] Determine a time slot that is N2 time slots after the first reference time slot as a time domain position of the first channel, where N2 is an integer greater than or equal to 1;

[0238] Determine the time slot where the nearest physical direct link feedback channel PSFCH opportunity after the first reference time slot is located as the time domain position of the first channel;

[0239] The K+n or Kn time slot is determined as the time domain position of the first channel, wherein the nearest physical direct link feedback channel PSFCH opportunity after the first reference time slot is located in the Kth time slot, and n is an integer greater than or equal to 1.

[0240] In some embodiments of the present application, the minimum time interval between the time domain position of the first channel and the first reference time slot is Y time slots, where Y represents the processing delay budget of the first terminal.

[0241] In some embodiments of the present application, the resources of the first channel correspond one-to-one with the candidate beam determination CBD reference signal or the new direct link beam; or, the indication device 140 of the direct link beam failure information further includes:

[0242] The third determination unit is used to control the first terminal to determine the CBD reference signal or the new direct link beam according to the candidate beam, and determine the resources of the first channel.

[0243] In some embodiments of the present application, the number of resource blocks RBs in the candidate resource set of the first channel in the first resource pool is an integer multiple of the product of the number of sub-channels included in the first resource pool and the first channel resource period value.

[0244] In some embodiments of the present application, the candidate resource set of the first channel is determined based on at least one of the following:

[0245] Mapping the first channel candidate resources based on the time slot number of the physical direct link control channel PSCCH or the physical direct link shared channel PSSCH associated with the first channel and the number of the starting subchannel occupied by the physical direct link control channel PSCCH or the physical direct link shared channel PSSCH transmission;

[0246] The first channel candidate resources are mapped based on the time slot number of the physical direct link control channel PSCCH or the physical direct link shared channel PSSCH associated with the first channel and the numbers of all subchannels occupied by the physical direct link control channel PSCCH or the physical direct link shared channel PSSCH transmission.

[0247] It should be noted that the division of units in the embodiments of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation. In addition, each functional unit in each embodiment of the present application may be integrated into a processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0248] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a processor-readable storage medium.

[0249] Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) or a processor to execute all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk, etc., various media that can store program codes.

[0250] It should be noted here that the above-mentioned device provided in the embodiment of the present application can implement all the method steps implemented in the above-mentioned method embodiment, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as those in the method embodiment will not be described in detail here.

[0251] In this embodiment, the first terminal sends indication information to the second terminal through the first channel, wherein the indication information is used to indicate relevant information of the failure of the direct link beam, the time domain position of the first channel is related to the first reference time slot, and / or the resources of the first channel are related to the CBD reference signal determined by the candidate beam or are related to the new direct link beam, so that the first terminal can promptly notify the second terminal of the indication information indicating the failure of the direct link beam, so that the second terminal can promptly take methods such as changing the beam to avoid data transmission failure and improve the success rate of direct link communication.

[0252] Fig.15 It is a structural diagram of a device for indicating direct link beam failure information proposed in one embodiment of the present application.

[0253] like Fig.15 As shown, the indication device 150 of the direct link beam failure information includes:

[0254] Receiving unit 1501 is used to control the second terminal to receive indication information sent by the first terminal through the first channel, wherein the indication information is used to indicate relevant information about the failure of the direct link beam, the time domain position of the first channel is related to the first reference time slot, and / or the resources of the first channel are related to the candidate beam determination CBD reference signal or are related to a new direct link beam.

[0255] In some embodiments of the present application, the relevant information of the through link beam failure includes at least one of the following:

[0256] New through link beam information;

[0257] first information, wherein the first information is used to indicate whether there is a direct link beam failure;

[0258] Second information, wherein the second information is used to indicate the existence of a direct link beam failure.

[0259] In some embodiments of the present application, the first reference time slot includes at least one of the following:

[0260] The time slot when beam failure occurs;

[0261] A time slot in which a beam fails, determined by the first terminal;

[0262] The time slot where the beam failure instance BFI is located;

[0263] The candidate beam determines the time slot where the CBD is located.

[0264] In some embodiments of the present application, it is characterized in that the first channel includes at least one of the following:

[0265] Physical direct link feedback channel PSFCH carrying information related to direct link beam failure;

[0266] New sequence-based Physical Direct Link Beam Failure Indicator Channel PSBFCH;

[0267] A new type of physical direct link feedback channel PSFCH.

[0268] It should be noted that the division of units in the embodiments of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation. In addition, each functional unit in each embodiment of the present application may be integrated into a processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0269] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a processor-readable storage medium.

[0270] Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) or a processor to execute all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk, etc., various media that can store program codes.

[0271] It should be noted here that the above-mentioned device provided in the embodiment of the present application can implement all the method steps implemented in the above-mentioned method embodiment, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as those in the method embodiment will not be described in detail here.

[0272] In this embodiment, the second terminal receives indication information sent by the first terminal through the first channel, wherein the indication information is used to indicate relevant information of the failure of the direct link beam, the time domain position of the first channel is related to the first reference time slot, and / or the resources of the first channel are related to the CBD reference signal determined by the candidate beam or are related to the new direct link beam. Thus, the second terminal can promptly obtain the indication information used to indicate the failure of the direct link beam, so that the second terminal can take methods such as changing the beam based on the indication information to avoid data transmission failure and improve the success rate of direct link communication.

[0273] Fig.16 It is a structural diagram of a device for indicating direct link beam failure information proposed in another embodiment of the present application.

[0274] See also Fig.16 The device 160 indicating the failure information of the through link beam includes a memory 1601, a transceiver 1602, a processor 1603 and a user interface 1604: the memory 1601 is used to store a computer program; the transceiver 1602 is used to send and receive data under the control of the processor 1603; the processor 1603 is used to read the computer program in the memory 1601 and perform the following operations:

[0275] The first terminal sends indication information to the second terminal via the first channel, wherein the indication information is used to indicate relevant information about the failure of a direct link beam, the time domain position of the first channel is related to a first reference time slot, and / or the resources of the first channel are related to a candidate beam determined CBD reference signal or are related to a new direct link beam.

[0276] Among them, Fig.16 In the embodiment, the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by processor 1603 and various circuits of memory represented by memory 1601 are linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface. The transceiver 1602 may be a plurality of components, namely, a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium, which may include wireless channels, wired channels, optical cables, and other transmission media. For different user devices, the user interface 1604 may also be an interface capable of externally and internally connecting required devices, and the connected devices include but are not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.

[0277] The processor 1603 is responsible for managing the bus architecture and general processing, and the memory 1601 can store data used by the processor 1603 when performing operations.

[0278] Optionally, the processor 1603 may be a CPU (central processing unit), an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array) or a CPLD (Complex Programmable Logic Device), and the processor may also adopt a multi-core architecture.

[0279] The processor calls the computer program stored in the memory to execute any method provided in the embodiments of the present application according to the obtained executable instructions. The processor and the memory can also be arranged physically separately.

[0280] It should be noted here that the above-mentioned device provided in the embodiment of the present application can implement all the method steps implemented in the above-mentioned method embodiment, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as those in the method embodiment will not be described in detail here.

[0281] Fig.17 It is a structural diagram of a device for indicating direct link beam failure information proposed in another embodiment of the present application.

[0282] See also Fig.17 The device 170 indicating the failure information of the direct link beam includes a memory 1701, a transceiver 1702, a processor 1703 and a user interface 1704: the memory 1701 is used to store a computer program; the transceiver 1702 is used to send and receive data under the control of the processor 1703; the processor 1703 is used to read the computer program in the memory 1701 and perform the following operations:

[0283] The second terminal receives indication information sent by the first terminal through the first channel, wherein the indication information is used to indicate relevant information about the failure of the direct link beam, the time domain position of the first channel is related to the first reference time slot, and / or the resources of the first channel are related to the candidate beam determination CBD reference signal or are related to a new direct link beam.

[0284] Among them, Fig.17In the embodiment, the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by processor 1703 and various circuits of memory represented by memory 1701 are linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface. The transceiver 1702 may be a plurality of components, namely, a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium, which may include wireless channels, wired channels, optical cables, and other transmission media. For different user devices, the user interface 1704 may also be an interface capable of externally and internally connecting required devices, and the connected devices include but are not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.

[0285] The processor 1703 is responsible for managing the bus architecture and general processing, and the memory 1701 can store data used by the processor 1703 when performing operations.

[0286] Optionally, the processor 1703 may be a CPU (central processing unit), an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array) or a CPLD (Complex Programmable Logic Device), and the processor may also adopt a multi-core architecture.

[0287] The processor calls the computer program stored in the memory to execute any method provided in the embodiments of the present application according to the obtained executable instructions. The processor and the memory can also be arranged physically separately.

[0288] It should be noted here that the above-mentioned device provided in the embodiment of the present application can implement all the method steps implemented in the above-mentioned method embodiment, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as those in the method embodiment will not be described in detail here.

[0289] In order to implement the above-mentioned embodiment, the embodiment of the present application proposes a processor-readable storage medium, wherein the processor-readable storage medium stores a computer program, and the computer program is used to enable the processor to execute a method for indicating direct link beam failure information.

[0290] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) that contain computer-usable program code.

[0291] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer executable instructions. These computer executable instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0292] These processor executable instructions may also be stored in a processor readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the processor readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0293] These processor-executable instructions may also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable device to implement the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0294] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

[0295] It should be noted that, in the description of this application, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of this application, unless otherwise specified, the meaning of "plurality" is two or more.

[0296] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0297] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0298] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0299] In addition, each functional unit in each embodiment of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0300] The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc.

[0301] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0302] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A method for indicating direct link beam failure information, characterized in that: The method comprises: The first terminal sends indication information to the second terminal via the first channel, wherein the indication information is used to indicate relevant information about the failure of a direct link beam, the time domain position of the first channel is related to a first reference time slot, and / or the resources of the first channel are related to a candidate beam determined CBD reference signal or are related to a new direct link beam.

2. The method according to claim 1, characterized in that The related information of the through link beam failure includes at least one of the following: New through link beam information; first information, wherein the first information is used to indicate whether there is a through link beam failure; Second information, wherein the second information is used to indicate the existence of a direct link beam failure.

3. The method according to claim 1, characterized in that The first reference time slot includes at least one of the following: The time slot when beam failure occurs; A time slot in which a beam fails, determined by the first terminal; The time slot where the beam failure instance BFI is located; The candidate beam determines the time slot where the CBD is located.

4. The method according to claim 1, characterized in that The first channel includes at least one of the following: A physical direct link feedback channel PSFCH carrying information related to the direct link beam failure; New sequence-based Physical Direct Link Beam Failure Indicator Channel PSBFCH; A new type of physical direct link feedback channel PSFCH.

5. The method according to claim 4, characterized in that The physical direct link feedback channel PSFCH carries hybrid automatic repeat request confirmation HARQ ACK information, or carries relevant information about the failure of the direct link beam, by means of different time domain resources and / or different frequency domain resources and / or different sequences and / or different cyclic shifts.

6. The method according to claim 1, characterized in that in, The first terminal repeatedly sends a physical direct link feedback channel PSFCH on two symbols, wherein a first symbol and a second symbol of the two symbols correspond to different beam directions; or The first terminal repeatedly sends a physical direct link beam failure indication channel PSBFCH on N symbols, where the N symbols correspond to M beam directions, N and M are integers greater than 1 respectively, and M is less than or equal to N.

7. The method according to claim 6, characterized in that The sending of a physical direct link feedback channel PSFCH comprises: The physical direct link feedback channel PSFCH is sent based on the widest beam that the physical direct link feedback channel PSFCH can use.

8. The method according to claim 6, characterized in that The sending of a physical direct link feedback channel PSFCH comprises: Different physical direct link feedback channels PSFCH are sent based on different sending mechanisms, wherein different physical direct link feedback channels PSFCH are used to send hybrid automatic repeat request confirmation HARQ ACK information and hybrid automatic repeat request non-confirmation HARQ NACK information, respectively, and the number of repeated symbols and / or beam directions of different sending mechanisms are different.

9. The method according to claim 6, characterized in that The sending of a physical direct link beam failure indication channel PSBFCH comprises: The Physical Direct Link Beam Failure Indication Channel PSBFCH is sent based on the widest beam that the Physical Direct Link Beam Failure Indication Channel PSBFCH can use.

10. The method according to claim 1, characterized in that The sending the indication information to the second terminal through the first channel includes: Sending the first channel at a preset period; The preset period is any one of 1 time slot, 2 time slots, and 4 time slots.

11. The method according to claim 1, characterized in that The method further comprises: Determine whether the first channel is configured into the resource pool based on an enable switch parameter of relevant information of direct link beam failure in direct link control information SCI or radio resource control RRC signaling, wherein whether the first channel is configured into the resource pool is used to determine whether to send the first channel.

12. The method according to claim 1, characterized in that The method further comprises: Determine whether a direct link beam failure occurs in a physical direct link control channel (PSCCH) or a physical direct link shared channel (PSSCH) transmission.

13. The method according to claim 12, characterized in that The determining that a direct link beam failure occurs in a physical direct link control channel PSCCH or a physical direct link shared channel PSSCH transmission includes: Based on the non-acknowledgement HARQ NACK information of the hybrid automatic repeat request of the direct link or the reference signal measurement report, it is determined that a direct link beam failure occurs in the physical direct link control channel PSCCH or the physical direct link shared channel PSSCH transmission.

14. The method according to claim 13, characterized in that The determining that a direct link beam failure occurs in a physical direct link control channel PSCCH or a physical direct link shared channel PSSCH transmission based on the non-confirmation HARQ NACK information of the hybrid automatic repeat request or the reference signal measurement report of the direct link includes: When the count number of beam failure instances BFI of the direct link reaches a preset threshold, it is determined that a direct link beam failure occurs in the physical direct link control channel PSCCH or the physical direct link shared channel PSSCH transmission; wherein the count of beam failure instances BFI of the direct link is triggered by the reference signal measurement report or the continuous receipt of N non-acknowledgement HARQ NACK information of the hybrid automatic repeat request.

15. The method according to claim 14, characterized in that When the count number of beam failure instances BFI of the direct link reaches a preset threshold, determining that a direct link beam failure occurs in a physical direct link control channel PSCCH or a physical direct link shared channel PSSCH transmission includes: When the reference signal measurement report or the non-acknowledgement HARQ NACK information feedback of the hybrid automatic repeat request meets the condition, triggering sending the beam failure instance BFI of the direct link to the direct link media access control SL MAC layer; The through link media access control SL MAC layer starts counting when receiving the beam failure instance BFI of the through link, and obtains the counted number of the beam failure instance BFI of the through link; When the counted number reaches the preset threshold, the direct link media access control SL MAC layer determines that the direct link beam failure occurs.

16. The method according to any one of claims 1 to 14, characterized in that: Determining the time domain position of the first channel includes any of the following: Determine a first time slot containing a physical direct link feedback channel PSFCH resource as the time domain position of the first channel, wherein the first time slot is located in a time slot that is at least N1 time slots after the first reference time slot, where N1 is an integer greater than or equal to 1; Determine a time slot that is N2 time slots after the first reference time slot as a time domain position of the first channel, where N2 is an integer greater than or equal to 1; Determine the time slot where the nearest physical direct link feedback channel PSFCH opportunity after the first reference time slot is located as the time domain position of the first channel; The K+n or Kn time slot is determined as the time domain position of the first channel, wherein the nearest physical direct link feedback channel PSFCH opportunity after the first reference time slot is located in the Kth time slot, and n is an integer greater than or equal to 1.

17. The method according to any one of claims 1 to 14, characterized in that: The minimum time interval between the time domain position of the first channel and the first reference time slot is Y time slots, where Y represents the first terminal processing delay budget.

18. The method according to any one of claims 1 to 14, characterized in that: The resources of the first channel correspond one-to-one with the candidate beam determination CBD reference signal or the new direct link beam; or, the method further includes: The first terminal determines a CBD reference signal or the new direct link beam based on the candidate beam, and determines resources of the first channel.

19. The method according to any one of claims 1 to 14, characterized in that: The number of resource blocks RB in the candidate resource set of the first channel in the first resource pool is an integer multiple of the product of the number of sub-channels included in the first resource pool and the first channel resource period value.

20. The method of claim 19, wherein: The candidate resource set of the first channel is determined based on at least one of the following: Mapping the first channel candidate resources based on the time slot number of the physical direct link control channel PSCCH or the physical direct link shared channel PSSCH associated with the first channel and the number of the starting subchannel occupied by the physical direct link control channel PSCCH or the physical direct link shared channel PSSCH transmission; The first channel candidate resources are mapped based on the time slot number of the physical direct link control channel PSCCH or the physical direct link shared channel PSSCH associated with the first channel and the numbers of all subchannels occupied by the physical direct link control channel PSCCH or the physical direct link shared channel PSSCH transmission.

21. A method for indicating direct link beam failure information, characterized in that: The method comprises: The second terminal receives indication information sent by the first terminal through the first channel, wherein the indication information is used to indicate relevant information about the failure of the direct link beam, the time domain position of the first channel is related to the first reference time slot, and / or the resources of the first channel are related to the candidate beam determination CBD reference signal or are related to a new direct link beam.

22. The method according to claim 21, characterized in that The related information of the through link beam failure includes at least one of the following: New through link beam information; first information, wherein the first information is used to indicate whether there is a through link beam failure; Second information, wherein the second information is used to indicate the existence of a direct link beam failure.

23. The method of claim 21, wherein: The first reference time slot includes at least one of the following: The time slot when beam failure occurs; A time slot in which a beam fails, determined by the first terminal; The time slot where the beam failure instance BFI is located; The candidate beam determines the time slot where the CBD is located.

24. The method of claim 21, wherein: The first channel includes at least one of the following: A physical direct link feedback channel PSFCH carrying information related to the direct link beam failure; New sequence-based Physical Direct Link Beam Failure Indicator Channel PSBFCH; A new type of physical direct link feedback channel PSFCH.

25. A device for indicating direct link beam failure information, characterized in that: The device comprises: A sending unit, used to control the first terminal to send indication information to the second terminal through the first channel, wherein the indication information is used to indicate relevant information about the failure of the direct link beam, the time domain position of the first channel is related to the first reference time slot, and / or the resources of the first channel are related to the candidate beam determination CBD reference signal or are related to a new direct link beam.

26. A device for indicating direct link beam failure information, characterized in that: The device comprises: A receiving unit, used to control the second terminal to receive indication information sent by the first terminal through the first channel, wherein the indication information is used to indicate relevant information about the failure of a direct link beam, the time domain position of the first channel is related to a first reference time slot, and / or the resources of the first channel are related to a candidate beam determination CBD reference signal or are related to a new direct link beam.

27. A device for indicating direct link beam failure information, characterized in that: The invention comprises a memory, a transceiver and a processor: the memory is used to store a computer program; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer program in the memory and perform the following operations: The first terminal sends indication information to the second terminal via the first channel, wherein the indication information is used to indicate relevant information about the failure of a direct link beam, the time domain position of the first channel is related to a first reference time slot, and / or the resources of the first channel are related to a candidate beam determined CBD reference signal or are related to a new direct link beam.

28. A device for indicating direct link beam failure information, characterized in that: It includes memory, transceiver and processor: memory is used to store computer programs; a transceiver, for transmitting and receiving data under the control of the processor; A processor is configured to read the computer program in the memory and perform the following operations: The second terminal receives indication information sent by the first terminal through the first channel, wherein the indication information is used to indicate relevant information about the failure of the direct link beam, the time domain position of the first channel is related to the first reference time slot, and / or the resources of the first channel are related to the candidate beam determination CBD reference signal or are related to a new direct link beam.

29. A processor-readable storage medium, characterized in that: The processor-readable storage medium stores a computer program, and the computer program is used to enable the processor to execute the method for indicating direct link beam failure information as described in any one of claims 1-24.

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