Beam management method and device, equipment, storage medium and program product

Abstract

Disclosed are a beam management method, apparatus, device, storage medium and program product, which relate to the technical field of communications, the method being applied to a first device, the method comprising: after beam failure detection, executing one of the following operations: sending a beam re-pairing request to a second device, beam management is carried out according to the beam report sent by the second equipment; and measuring a beam failure detection reference signal (BFD-RS) sent by the second equipment, and performing beam management according to a measurement value of the BFD-RS. Therefore, the beam management mechanism in the SL communication is provided, and the problem that the beam management mechanism in the existing Uu communication is not suitable for the SL communication technology is solved.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a beam management method, apparatus, device, storage medium, and program product. Background Technology

[0002] Existing sidelink (SL) communication technologies, such as Long Term Evolution (LTE) and New Radio (NR), are omnidirectional. However, sidelink communication in the FR2 (Frequency Range 2) frequency band requires beamforming. Due to the distributed communication characteristics of SL and the different reference signal structure compared to Uu communication, the existing beam management technology in Uu communication is not suitable for SL communication. Therefore, it is necessary to design a beam management mechanism for SL communication. Summary of the Invention

[0003] The purpose of this application is to provide a beam management method, apparatus, device, storage medium, and program product, thereby solving the problem that the beam management mechanism in Uu communication is not applicable to SL communication.

[0004] Firstly, in order to achieve the above objectives, embodiments of this application provide a beam management method applied to a first device, the method comprising:

[0005] After beam failure detection, perform one of the following operations:

[0006] Send a beam re-pairing request to the second device and perform beam management based on the beam report sent by the second device;

[0007] The beam failure detection reference signal (BFD-RS) sent by the second device is measured, and beam management is performed based on the measured value of the BFD-RS.

[0008] Optionally, the triggering condition for the beam failure detection includes at least one of the following:

[0009] The first device achieves the preset conditions;

[0010] All measured values ​​of the beam reference signal transmitted by the second device and measured by the first device are below the first threshold.

[0011] Among the measured values ​​of the beam reference signal transmitted by the second device, which are measured by the first device, the proportion of measured values ​​below the second threshold is greater than the first threshold value among all measured values.

[0012] The sum of the number of times the first device receives a negative response from the second device and the number of times it does not receive a response from the second device is greater than or equal to N; N is a positive integer.

[0013] Optionally, sending a beam repair request to the second device includes:

[0014] The beam re-pairing request is sent to the second device in a beam scanning manner. The beam re-pairing request carries a first reference signal, which is used for beam measurement.

[0015] Optionally, the method further includes at least one of the following:

[0016] After sending the beam re-pairing request, the beam report is received within a first time window; the first time window is associated with the transmission resource of the beam re-pairing request.

[0017] The beam report is received on the beam report resource corresponding to the Physical Straight-through Link Control Channel (PSCCH) and / or the Physical Straight-through Link Shared Channel (PSSCH) that carries the beam re-pairing request.

[0018] Optionally, beam management is performed based on the beam report sent by the second device, including:

[0019] Based on the beam information carried in the beam report, obtain the first target beam;

[0020] Resume communication with the second device on the first target beam.

[0021] Optionally, the method further includes at least one of the following:

[0022] Based on the higher-level configuration parameters, the configuration information of the BFD-RS is obtained; the higher-level configuration parameters include beam failure configuration information and / or beam failure detection reference signal configuration information.

[0023] Based on the signaling exchanged between the first device and the second device, the configuration information of the BFD-RS is obtained;

[0024] The set of periodic reference signals that are quasi-co-located with the demodulation reference signal DMRS carried by PSCCH and / or PSSCH is defined as BFD-RS.

[0025] Optionally, beam management is performed based on the measurements from the BFD-RS, including:

[0026] In the case of triggering beam failure recovery (BFR) based on the measured value of BFD-RS, the periodic candidate beam detection reference signal (CBD-RS) sent by the second device is measured according to the configuration information of CBD-RS.

[0027] Based on the measurements of the CBD-RS, candidate beam pairs are obtained;

[0028] In the direction of the second target beam, a beam failure recovery request (BFRQ) is sent to the second device. The BFRQ includes one or more of the following: beam failure event indication, candidate beam indication information, and the identifier ID of the first device. The candidate beam pair includes the second target beam.

[0029] In the beam direction corresponding to the second target beam, receive the beam failure recovery response (BFRR) sent by the second device;

[0030] Upon receiving the BFRR, communication with the second device is restored on the second target beam.

[0031] Optionally, beam management is performed based on the measurements from the BFD-RS, including:

[0032] If BFR is triggered based on the BFD-RS measurement, a BFRQ is sent to the second device. The BFRQ is used to trigger the second device to perform a first operation, which includes sending CBD-RS or beam re-pairing.

[0033] Receive BFRR sent by the second device, and / or, according to the CBD-RS configuration information, receive CBD-RS sent by the second device;

[0034] The third target beam is determined based on the BFRR and / or the CBD-RS;

[0035] Communication with the second device is restored on the third target beam;

[0036] The BFRQ includes one or more of the following: beam fault event indication, ID of the first device, CBD-RS trigger request, second reference signal, and beam information.

[0037] Optionally, receiving the BFRR sent by the second device includes:

[0038] The BFRR is received within a time delay limit using beam scanning; wherein the time delay limit is a preset time length after the BFRQ is transmitted; or,

[0039] The BFRR is received on the time-frequency resources corresponding to the PSCCH and / or PSSCH resources carrying the BFRQ.

[0040] Optionally, a third target beam is determined based on the BFRR and / or the CBD-RS, including at least one of the following:

[0041] The CBD-RS transmitted by the second device is measured, and the third target beam is determined based on the measured value of the CBD-RS;

[0042] The third target beam is determined based on the beam information carried by the BFRR;

[0043] Based on the configuration information of the CBD-RS indicated by the BFRR, the CBD-RS transmitted by the second device is measured, and the third target beam is determined based on the measured value of the CBD-RS.

[0044] Optionally, the method further includes:

[0045] Based on the first information, obtain the configuration information of CBD-RS; the first information includes at least one of the following:

[0046] High-level configuration parameters, including beam failure configuration information and / or beam failure detection reference signal configuration information;

[0047] Signaling exchanged between the first and second devices;

[0048] The second device sends the BFRR.

[0049] Optionally, the BFRQ is carried on any of the following resources:

[0050] The beam reporting resources of the CBD-RS corresponding to the second target beam;

[0051] PSCCH and / or PSSCH resources.

[0052] Optionally, sending a beam failure recovery request (BFRQ) to the second device includes:

[0053] When the BFRQ is carried on PSCCH and / or PSSCH resources, the BFRQ is transmitted to the second device in the second target beam direction, either in beam scanning or in wide beam form, within the second time window.

[0054] The second time window is associated with the transmission resources of the CBD-RS, or the second time window is associated with the transmission resources of the BFD-RS.

[0055] Secondly, in order to achieve the above objectives, embodiments of this application provide a beam management method applied to a second device, the method comprising one of the following operations:

[0056] Receive a beam repair request sent by a first device and send a beam report to the first device, the beam report being used to assist the first device in beam management;

[0057] A BFD-RS is sent to the first device, the BFD-RS being used to assist the first device in beam management.

[0058] Optionally, receiving a beam repair request from the first device and sending a beam report to the first device includes:

[0059] The beam re-pairing request is received in a beam scanning manner. The beam re-pairing request carries a first reference signal, which is used for beam measurement.

[0060] The first reference signal is measured, and candidate beam pairs are selected based on the measured value of the first reference signal;

[0061] The beam report is sent to the first device, the beam report including the measured value of the first reference signal and / or the beam information of the candidate beam pair.

[0062] Optionally, the method further includes:

[0063] Send periodic CBD-RS to the first device;

[0064] Receive a BFRQ sent by the first device, wherein the BFRQ includes one or more of the following: beam failure event indication, candidate beam indication information, and the ID of the first device;

[0065] In the beam direction corresponding to the second target beam, a BFRR is sent to the first device, where the second target beam is the beam that receives the BFRQ.

[0066] Optionally, the method further includes:

[0067] Receive a BFRQ sent by a first device; wherein the BFRQ includes one or more of the following: beam fault event indication, ID of the first device, CBD-RS trigger request, second reference signal, and beam information;

[0068] In response to the BFRQ, a first operation is performed; wherein the first operation includes: transmitting CBD-RS, or beam re-pairing;

[0069] Send a BFRR to the first device, and / or send a CBD-RS to the first device according to the CBD-RS configuration information; wherein, when the first operation is to send a CBD-RS, the BFRR carries the CBD-RS configuration information, and when the first operation is to re-pair beams, the BFRR carries the beam information of the re-paired beam pair.

[0070] Optionally, the method further includes:

[0071] Based on the higher-level configuration parameters, obtain the CBD-RS configuration information, which includes beam failure configuration information and / or beam failure detection reference signal configuration information; and / or,

[0072] The reference signal used for beam measurement is determined to be CBD-RS.

[0073] Optionally, receiving a BFRQ sent by the first device includes at least one of the following:

[0074] The BFRQ is received on the beam reporting resource of CBD-RS;

[0075] Within the second time window, the BFRQ is received in beam scanning, wide beam, or omnidirectional beam form.

[0076] The second time window is associated with the transmission resources of the CBD-RS, or the second time window is associated with the transmission resources of the BFD-RS.

[0077] Optionally, sending a BFRR to the first device includes at least one of the following:

[0078] When the BFRQ carries candidate beam indication information, the transmission resource of the BFRR is selected, and within the time delay limit, the BFRR is transmitted to the first device on the beam indicated by the candidate beam indication information.

[0079] When the BFRQ carries a CBD-RS trigger request, the resource for sending the BFRR is selected, and within the time delay limit, the BFRR is sent to the first device through the corresponding beam of the receiving beam of the BFRQ, or through a wide beam form, an omnidirectional beam form, or a beam scanning form.

[0080] When the second device responds to the BFRQ and performs beam re-pairing, it selects to send the resources of the BFRR, and within the time delay limit, sends the BFRR to the first device through the beam obtained by beam re-pairing, or through wide beam mode, omnidirectional beam mode, or beam scanning mode.

[0081] Optionally, in response to the BFRQ, beam repairing is performed, including:

[0082] The second reference signal carried by the BFRQ is measured;

[0083] Candidate beam pairs are selected based on the measured values ​​of the second reference signal to obtain rematched beam pairs.

[0084] Thirdly, in order to achieve the above objectives, embodiments of this application provide a beam management device applied to a first device, the device comprising:

[0085] The processing module is used to perform one of the following operations after beam failure detection:

[0086] Send a beam re-pairing request to the second device and perform beam management based on the beam report sent by the second device;

[0087] The beam failure detection reference signal (BFD-RS) sent by the second device is measured, and beam management is performed based on the measured value of the BFD-RS.

[0088] Fourthly, in order to achieve the above objectives, embodiments of this application provide a beam management device applied to a second device, the device comprising one of the following modules:

[0089] The transceiver module is used to receive a beam repairing request sent by the first device and send a beam report to the first device. The beam report is used to assist the first device in beam management.

[0090] The first transmitting module is used to transmit BFD-RS to the first device, wherein the BFD-RS is used to assist the first device in beam management.

[0091] Fifthly, in order to achieve the above objectives, embodiments of this application provide a beam management device, including a transceiver, a memory, a processor, and a computer program stored in the memory and running on the processor. When the processor executes the computer program, it implements the beam management method as described in the first aspect, or implements the beam management method as described in the second aspect.

[0092] Sixthly, in order to achieve the above objectives, embodiments of this application provide a readable storage medium having a program or instructions stored thereon, wherein the program or instructions, when executed by a processor, implement the beam management method as described in the first aspect, or implement the beam management method as described in the second aspect.

[0093] Seventhly, in order to achieve the above objectives, embodiments of this application provide a computer program product, including computer instructions, which, when executed by a processor, implement the beam management method as described in the first aspect, or implement the beam management method as described in the second aspect.

[0094] The above-mentioned technical solution of this application has at least the following beneficial effects:

[0095] In the beam management method of this application embodiment, after beam failure detection, the first device performs one of the following operations: sends a beam re-pairing request to the second device and performs beam management based on the beam report sent by the second device; measures the beam failure detection reference signal (BFD-RS) sent by the second device and performs beam management based on the measured value of the BFD-RS. Thus, the embodiments of this application provide a beam management mechanism in SL communication, solving the problem that the existing beam management mechanism in Uu communication is not suitable for SL communication technology. Attached Figure Description

[0096] Figure 1 This is one of the flowcharts illustrating the beam management method according to an embodiment of this application;

[0097] Figure 2 This is a schematic diagram of the first time window in an embodiment of this application;

[0098] Figure 3 This is a schematic diagram illustrating the relationship between the PSCCH / PSSCH carrying beam re-pairing requests and the PSFCH carrying beam reports in the embodiments of this application.

[0099] Figure 4 This is a schematic diagram of a beam pair in an embodiment of this application;

[0100] Figure 5 This is one of the schematic diagrams of the time window for sending BFRQ in the embodiments of this application;

[0101] Figure 6 This is a schematic diagram of transmitting BFRQ on a new beam in an embodiment of this application;

[0102] Figure 7 This is the second schematic diagram of the time window for sending BFRQ in this application;

[0103] Figure 8 This is a second schematic flowchart of the beam management method according to an embodiment of this application;

[0104] Figure 9 This is the third flowchart illustrating the beam management method according to an embodiment of this application;

[0105] Figure 10This is the fourth flowchart illustrating the beam management method according to an embodiment of this application;

[0106] Figure 11 This is the fifth flowchart illustrating the beam management method according to an embodiment of this application;

[0107] Figure 12 This is one of the structural schematic diagrams of the beam management device according to an embodiment of this application;

[0108] Figure 13 This is a second schematic diagram of the beam management device according to an embodiment of this application. Detailed Implementation

[0109] To make the technical problems, technical solutions, and advantages of this application clearer, a detailed description will be provided below in conjunction with the accompanying drawings and specific embodiments. In the following description, specific details such as particular configurations and components are provided merely to aid in a comprehensive understanding of the embodiments of this application. Therefore, those skilled in the art should understand that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this application. Furthermore, for clarity and brevity, descriptions of known functions and structures have been omitted.

[0110] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this application. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0111] In the various embodiments of this application, it should be understood that the sequence number of each process described below does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0112] In the embodiments provided in this application, it should be understood that "B corresponding to A" means that B is associated with A, and B can be determined based on A. However, it should also be understood that determining B based on A does not mean determining B solely based on A; B can also be determined based on A and / or other information.

[0113] In describing the embodiments of this application, some concepts used in the following description will first be explained.

[0114] In NR Uu communication, the Beam Failure Recovery (BFR) process includes the Beam Failure Detection (BFD) process, the Beam Failure Recovery Request (BFRQ) process, and the Beam Failure Recovery Response (BFRR) process.

[0115] In NR Uu communication, beam failure detection is achieved by the UE detecting the periodic beam failure detection reference signal (BFD-RS), where BFD-RS is either the channel state information-reference signal (CSI-RS) or the synchronization signal and PBCH block (SS / PBCH).

[0116] When the UE is configured with the higher-layer parameter Beam-Failure-Detection-RS-ResourceConfig, the set of periodic CSI-RS resource indices configured by the higher-layer signaling is the BFD-RS set. When the UE is not configured with the higher-layer parameter Beam-Failure-Detection-RS-ResourceConfig, the BFD-RS set is determined to be the periodic CSI-RS or SS / PBCH that satisfies the quasi-co-location (QCL) relationship with the dedicated demodulation reference signals (DMRS) of the physical downlink control channel (PDCCH) that the UE is listening to.

[0117] The UE higher-level configuration parameters are the maximum number of beam failure instances and the beam failure detection timer, and the variable beam failure instance counter (BFI_COUNTER) is started.

[0118] The beam failure detection process is as follows:

[0119] (1) Trigger the BFR process

[0120] Initialize BFI_COUNTER = 0;

[0121] When the UE detects that the quality of all BFD-RS signals (Layer 1-Reference Signal Received Power (L1-RSRP) / Layer 1-Signal to Interference plus Noise Ratio (L1-SINR)) is lower than the threshold Qout_LR, the Physical (PHY) layer reports a beam failure instance indication to the Media Access Control (MAC) layer, increments BFI_COUNTER by 1, and the MAC layer starts a BFD-timer (beam failure detection timer).

[0122] If the MAC layer receives a beam failure instance indication within the BFD-Timer time window, increment BFI_COUNTER by 1 and restart the BFD-Timer.

[0123] When the number of beam failure instance indications exceeds the threshold (BFI_COUNTER>=beamFailureInstanceMaxCount), the BFR process is considered to have been triggered.

[0124] (2) BFR process not triggered

[0125] Initialize BFI_COUNTER = 0;

[0126] When the UE detects that the quality of all BFD-RS signals (L1-RSRP / L1-SINR) is lower than the threshold Qout_LR, the PHY layer reports a beam failure instance indication to the MAC layer, BFI_COUNTER+1, and the MAC layer starts a BFD-timer.

[0127] If the MAC layer receives a beam failure instance indication within the BFD-Timer time window, increment BFI_COUNTER by 1 and restart the BFD-Timer.

[0128] When the BFD-Timer times out and the MAC layer still has not received a beam failure instance indication, BFI_COUNTER is initialized to 0.

[0129] (3) BFR Confirmation Process

[0130] If the BFD procedure triggers beam failure recovery, the UE selects a new candidate beam by detecting the Candidate Beam Detection Reference Signal (CBD-RS) (such as SSBs) and reports the BFRQ and the newly selected transmit beam (TX beam) to the base station through the corresponding Physical Random Access Channel (PRACH) resource. Then, the UE listens for the BFRR sent by the base station in a specific synchronization signal (configured by recovery-Search-Space-Id). When the UE receives the BFRR, it considers that the beam failure event and the new candidate beam have been correctly received by the base station.

[0131] The implementation process of the beam management method, apparatus, device, storage medium, and program product provided in the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0132] Embodiments of this application provide a beam management method applied to a first device, wherein the first device is a BFR detection and initiator, such as... Figure 1 As shown, the method includes:

[0133] Step 101: After beam failure detection, perform one of the following operations:

[0134] Send a beam re-pairing request to the second device and perform beam management based on the beam report sent by the second device;

[0135] The beam failure detection reference signal (BFD-RS) sent by the second device is measured, and beam management is performed based on the measured value of the BFD-RS.

[0136] In other words, after triggering beam failure detection, the first device can perform beam management using either of the following two methods:

[0137] Method 1: Send a beam re-pairing request to the second device and receive a beam report from the second device to determine the reselected beam based on the beam report, so as to communicate with the second device on the reselected beam;

[0138] Method 2: Receive the BFD-RS signal sent by the second device, measure the received BFD-RS signal, select a new beam based on the measured value of the BFD-RS, and communicate with the second device on the selected new beam.

[0139] In the beam management method of this application embodiment, after beam failure detection, the first device can send a beam re-pairing request to the second device and perform beam management according to the beam report sent by the second device; or, after beam failure detection, the first device can also measure the BFD-RS sent by the second device and perform beam management according to the measured value of the BFD-RS; thus, communication can be established with the second device on the selected new beam. In this way, a beam management mechanism in SL communication is provided, which solves the problem that the existing beam management mechanism in Uu communication is not suitable for SL communication technology.

[0140] As an optional implementation, the triggering condition for beam failure detection includes at least one of the following:

[0141] (1) The first device achieves the preset conditions; for example, the first device rotates or its motion state changes, etc.

[0142] (2) All measured values ​​of the beam reference signal transmitted by the second device and measured by the first device are lower than the first threshold; here, the first threshold is configured or pre-configured by higher layer parameters;

[0143] (3) Among the measured values ​​of the beam reference signal transmitted by the second device measured by the first device, the proportion of measured values ​​below the second threshold among all measured values ​​is greater than the first threshold value; here, the second threshold value is configured or pre-configured by higher layer parameters, and the first threshold value is the higher layer configuration parameter;

[0144] (4) The sum of the number of times the first device receives a negative acknowledgment from the second device and the number of times it does not receive an acknowledgment from the second device is greater than or equal to N; N is a positive integer. As a special case, this condition is: the sum of the number of times the first device continuously receives a negative acknowledgment from the second device and the number of times it does not receive an acknowledgment from the second device is greater than or equal to N; in other words, this condition is: the first device (continuously) receives N negative acknowledgments (NACK) or is in a discontinuous transmission (DTX) state; a specific example of this condition is as follows:

[0145] The first device triggers beam failure detection. The trigger condition for beam failure detection is: in the second resource pool (communication resource pool), when the first device (continuously) receives N (higher-layer parameter configuration or pre-configuration) N ACKs or is in DTX state:

[0146] Specifically: Initialize a timer (timer = 0) and two counters (counter1 = 0, counter2 = 0).

[0147] Scenario 1: The timer starts counting down. When one NACK status is received consecutively, the counter1 value is incremented by 1. If an Acknowledgment (ACK) is received during this process, and the counter1 value is ≥ N while the timer is ≤ T, beam failure detection is considered triggered; otherwise, the counter1 value is reset to 0. When the timer reaches the configured value T, if the counter1 value is ≥ N at this point, beam failure detection is considered triggered; otherwise, it is not considered triggered.

[0148] Scenario 2: The timer starts counting. When one NACK is received consecutively or the system is in DTX state, the counter1 value is incremented by 1. When an ACK is received during this process, if the counter1 value is ≥ N and timer ≤ T, beam failure detection is considered triggered; otherwise, the counter1 value is reset to 0. When the timer reaches the configured value T, if the counter1 value is ≥ N at this time, beam failure detection is considered triggered; otherwise, it is not considered triggered.

[0149] Scenario 3: The timer starts counting. When one NACK state is received consecutively or the system is in DTX state, the counter1 value is incremented by 1; when an ACK is received during this process, the counter2 value is incremented by 1. When the timer reaches the configured value T, if the counter1 / (counter1+counter2) value is greater than or equal to the threshold M, then beam failure detection is considered triggered; otherwise, it is not considered triggered.

[0150] As an optional implementation, sending a beam re-pairing request to the second device in step 101 includes:

[0151] The first device sends a beam repair request to the second device in a beam scanning manner. The beam repair request carries a first reference signal, which is used for beam measurement. Specifically, the first device sends the beam repair request to the second device in a second resource pool (general resource pool) in a beam scanning manner.

[0152] The beam re-pairing request is carried by the Physical Sidelink Shared Channel (PSSCH) and / or the Physical Sidelink Control Channel (PSCCH), and the first reference signal carried by it can be: a Beam Measurement Reference Signal (BMRS) dedicated to beam measurement, a Sidelink Synchronization Signal (SLSS), a Sidelink Channel State Information Reference Signal (SL CSI-RS), a Demodulation Reference Signal (DMRS), etc. The pattern, time and frequency domain resources, and other information of the reference signal need to be (pre)configured.

[0153] In addition, when the first device sends a beam re-pairing request, the information carried by the PSCCH / PSSCH includes, but is not limited to, at least one of the following: reference signal indication information, beam measurement auxiliary information, source ID, destination ID, zone ID, priority information, and second-stage sidelink control information format. nd -stage SCI format) and time-frequency domain information, modulation and coding scheme (MCS), MCS table indication, Hybrid automatic repeat request (HARQ) related information, and reserved bit;

[0154] The reference signal indication information includes, but is not limited to, at least one of the following: time-domain configuration information of the reference signal, frequency-domain configuration information of the reference signal, number of reference signal ports, and sequence; specifically:

[0155] The time-domain configuration information of the reference signal includes, but is not limited to, at least one of the following: reference signal time-domain pattern information, reference signal time-domain start symbol position information, and reference signal time-domain symbol information;

[0156] The frequency domain configuration information of the reference signal includes, but is not limited to, at least one of the following: frequency domain pattern information of the reference signal (starting resource element (RE), comb size, comb offset, cyclic shift / orthogonal cover code (OCC);

[0157] The beam measurement auxiliary information includes, but is not limited to, at least one of the following: beam index information (which can be indicated by the reference signal port indicator field, or the reference signal sequence indicator, or a combination of port and sequence), beam number information (the total number of different beam directions represented by the transmitted reference signal (the total number of narrow beams corresponding to the current wide beam), the total number of different beam directions of the transmitted control channel (the total number of wide beams)), beam resource indication information (resource indication information reserved by the current device for all transmitted beams), and beam report indication (one or more of the following: time interval (the time interval between the beam report time domain start transmission position), feedback delay limit, and time window information).

[0158] Furthermore, as an optional implementation, the method also includes at least one of the following:

[0159] (1) After sending the beam re-pairing request, receive the beam report within a first time window; the first time window is associated with the transmission resource of the beam re-pairing request;

[0160] In other words, such as Figure 2 As shown, within a time window (the first time window) after completing a round of transmission, the first device receives beam reports sent by the second device in the form of beam scanning; specifically, this time window is configured or pre-configured by higher-layer parameters, for example, the start and duration of the time window are configured or pre-configured by higher-layer parameters. As a specific example of this situation, the second device determines the time to send beam reports in the following two ways:

[0161] One scenario is that the second device determines the timing of beam report transmission based on the beam measurement auxiliary information carried by the first device in the beam re-pairing request, or through higher-layer configuration or pre-configuration; specifically:

[0162] 1) When the beam report in the beam re-pairing request indicates that it carries time interval information, or when the higher layer parameters are configured or pre-configured with time interval information, the second device needs to determine the start position of the time domain for sending the beam report based on the time interval information carried.

[0163] 2) If the beam re-pairing request does not carry a beam report indication, the second device can determine whether all beam measurements have been completed based on the beam number information and / or beam resource indication information carried in the signaling of the first device, or the beam number information configured or pre-configured by higher-layer parameters, and determine whether a beam report needs to be sent.

[0164] Another scenario is that if the signaling received by the second device contains feedback delay limit or time window information, or if the higher-layer parameters are configured or pre-configured with the feedback delay limit or time window information, then the second device should provide feedback with the corresponding beam report under the condition that the delay limit or time window is met; wherein, the feedback delay limit is the upper limit of the beam measurement information feedback time, and the specific feedback time should be less than the feedback delay limit.

[0165] (2) Receive the beam report on the beam report resource corresponding to the Physical Cut-Through Link Control Channel (PSCCH) and / or the Physical Cut-Through Link Shared Channel (PSSCH) carrying the beam re-pairing request; as an example, such as Figure 3 As shown, the beam report resource is, for example, the Physical Sidelink Feedback Channel (PSFCH), that is, the beam report is carried by the PSFCH corresponding to the PSCCH / PSSCH of the beam re-pairing request.

[0166] As an optional implementation, step 101, which involves beam management based on the beam report sent by the second device, includes:

[0167] Based on the beam information carried in the beam report, the first target beam is obtained; for example, when the beam report carries only the beam information of a beam pair, one beam in the beam pair is determined as the first target beam; when the beam report carries the beam information of multiple beam pairs, the beam with the highest measurement value is determined as the first target beam, or, a beam is randomly selected from multiple beam pairs as the first target beam.

[0168] Resume communication with the second device on the first target beam.

[0169] In other words, in this optional implementation, the first device can obtain the information of the new beam pair selected by the second device from the beam report, and can resume the communication process with the second device on the new beam pair.

[0170] Furthermore, as an optional implementation, the method also includes at least one of the following:

[0171] (1) Obtain the configuration information of the BFD-RS according to the higher-level configuration parameters; the higher-level configuration parameters include beam failure configuration information and / or beam failure detection reference signal configuration information; that is, the first device obtains the time-domain, frequency-domain, and beam information of the BFD-RS through the higher-level configuration parameters "beam failure configuration information" or "beam failure detection reference signal configuration information"; specifically:

[0172] Beam failure configuration information includes, but is not limited to, at least one of the following: beam failure detection resources, beam failure detection timer, beam failure instance threshold X, maximum number of beam failure instances, beam failure recovery request transmission timer, maximum number of beam failure recovery request retransmissions, beam failure recovery timer, maximum number of beam failure recovery attempts, and beam quality threshold.

[0173] The beam failure detection reference signal configuration information includes, but is not limited to, at least one of the following: reference signal type, time-domain configuration information of the reference signal, frequency-domain configuration information of the reference signal, number of reference signal ports, sequence, and beam index information (which can be indicated by the reference signal port indicator field, or the reference signal sequence indicator, or a combination of ports and sequences).

[0174] The time-domain configuration information of the reference signal includes, but is not limited to, at least one of the following: reference signal time-domain pattern information, reference signal time-domain start symbol position information, and reference signal time-domain symbol number information;

[0175] The frequency domain configuration information of the reference signal includes, but is not limited to, at least one of the following: frequency domain pattern information of the reference signal (e.g., starting RE, comb size, comb offset, cyclic shift / OCC), number of physical resource blocks (PRBs) and / or number of sub-channels in the frequency domain of the reference signal, and frequency domain shift information of the reference signal (number of PRBs relative to the frequency domain reference point).

[0176] (2) Based on the signaling exchanged between the first device and the second device, the configuration information of the BFD-RS is obtained; in other words, during the prior communication process or beam maintenance process, the first device obtains the relevant configuration information of the second device's BFD-RS. As a specific example, during the prior communication process or beam maintenance process, the first device obtains the relevant configuration information of the second device's BFD-RS. The source of the second device's periodic BFD-RS includes at least one of the following:

[0177] During the initial beam pairing and beam maintenance process, the set of periodic reference signals of candidate beam pairs obtained by the two devices based on beam measurement information is considered as the "first priority" candidate beam pair reference signal.

[0178] The second device selects other "second priority" candidate beam pairs reference signals that have not been obtained through beam measurement information, in addition to the candidate beam pairs, based on the prior information of the beams between the two devices.

[0179] Here, with Figure 4 For example, R1, R2, R3 and S1, S2, S3 are the "first priority" beam pairs obtained based on beam measurement information; S4, S5, S6 are the "second priority" beam pairs selected by the second device. The selection of "second priority" beam pairs is to allow for more candidate beam pairs to be selected when the first or second device experiences beam failure due to position changes or self-rotation during movement, thereby reducing the likelihood of entering the beam failure recovery process.

[0180] (3) The set of periodic reference signals that are quasi-co-location (QCL) with the demodulation reference signal DMRS carried by PSCCH and / or PSSCH is determined as BFD-RS.

[0181] By employing one or more of the above optional implementation methods to obtain the configuration information of BFD-RS or to determine BFD-RS, it is convenient to subsequently receive the BFD-RS sent by the second device based on the content obtained by the above optional implementation methods, and to measure the received BFD-RS in order to perform beam management based on the measurement value, thereby establishing communication with the second device on the newly selected beam pair, thus solving the problem that the beam management mechanism in the existing Uu communication is not suitable for SL communication technology.

[0182] As an optional implementation, step 101 involves beam management based on the BFD-RS measurements, including:

[0183] When beam failure recovery (BFR) is triggered based on the measured value of the BFD-RS, the periodic candidate beam detection reference signal (CBD-RS) sent by the second device is measured according to the configuration information of the CBD-RS, or, referred to as, the CBD-RS periodically sent by the second device is measured.

[0184] Candidate beam pairs are obtained based on the measured values ​​of the CBD-RS; for example, the candidate beam pairs are beam pairs whose measured values ​​are greater than a preset value, or the candidate beam pairs are beam pairs that account for a preset proportion among all received CBD-RS beam directions.

[0185] In the direction of the second target beam, a beam failure recovery request (BFRQ) is sent to the second device. The BFRQ includes one or more of the following: beam failure event indication, candidate beam indication information, and the identifier ID of the first device. The candidate beam pair includes the second target beam. For example, the second target beam is the beam with the largest measured value in the candidate beam pair. Here, it should be noted that the BFRQ transmission resource can be: (1) the beam report resource of the second target beam CBD-RS in the first resource pool (dedicated resource pool), that is, sending BFRQ signaling to the second device on the beam report resource; (2) the PSSCH / PSCCH resource in the second resource pool (communication resource pool). Optionally, as an example, such as Figure 5 As shown, after the CBD-RS resource set is transmitted in each cycle, a time window is configured or pre-configured by higher-layer parameters. The start and duration of the time window are configured or pre-configured by higher-layer parameters. After completing the CBD-RS measurement, the first device needs to transmit BFRQ to the second device within the time window corresponding to the resource set, either in a new beam direction, or in beam scanning, or in the form of a wide beam.

[0186] In the beam direction corresponding to the second target beam, receive the beam failure recovery response (BFRR) sent by the second device;

[0187] Upon receiving the BFRR, communication with the second device is restored on the second target beam.

[0188] In simple terms, the above-mentioned optional implementation can be described as follows: The first device first performs Candidate-Beam Detection, measures the CBD-RS, and obtains a new beam pair (the beam pair corresponding to the second target beam) based on the measurement results. After obtaining the new beam, it sends a BFRQ to the second device on the new beam. A flowchart of the above-mentioned optional implementation is shown below. Figure 6 As shown.

[0189] As another optional implementation, step 101 involves beam management based on the BFD-RS measurements, including:

[0190] When a beam fault event (BFR) is triggered based on the BFD-RS measurement, a BFRQ is sent to the second device. The BFRQ is used to trigger the second device to perform a first operation, which includes sending a CBD-RS or beam re-pairing. The BFRQ includes one or more of the following: a beam fault event indication, the ID of the first device, a CBD-RS trigger request, a second reference signal, and beam information. When the BFRQ is sent in a beam scanning mode, the BFRQ needs to carry beam information so that the second device can perform a beam scanning process based on the beam information carried by the BFRQ.

[0191] It should be noted that in the above steps, the BFRQ transmission resources can occupy the PSSCH / PSCCH resources in the second resource pool (communication resource pool).

[0192] Optionally, such as Figure 7 As shown, after the BFD-RS resource set is transmitted in each cycle, a time window is configured or pre-configured by higher-layer parameters. Optionally, the start and duration of the time window are configured or pre-configured by higher-layer parameters. After triggering BFR, the first device continuously transmits BFRQ to the second device in the corresponding time window in the form of beam scanning (or, in the form of wide beam or omnidirectional beam). The transmission mechanism of BFRQ will be explained later. If the first device does not receive BFRR, it can continue to transmit BFRQ in the next time window.

[0193] The device receives the BFRR sent by the second device, and / or receives the CBD-RS sent by the second device according to the CBD-RS configuration information; that is, after the first device sends a BFRQ to the second device, if the BFRQ triggers the second device to send a CBD-RS, the first device receives the CBD-RS sent by the second device according to the obtained CBD-RS configuration information; if the BFRQ triggers the second device to perform beam re-pairing, the first device receives the BFRR fed back by the second device, wherein the BFRR carries at least the beam information of the re-paired beam pair;

[0194] A third target beam is determined based on the BFRR and / or the CBD-RS; here, the third target beam is used to re-establish communication between the first device and the second device;

[0195] Communication with the second device is restored on the third target beam.

[0196] In the above-mentioned optional implementation, when the first device triggers BFR based on the measurement value of the BFD-RS, it sends a BFRQ to the second device. The BFRQ is used to trigger the second device to perform a first operation, which includes sending CBD-RS or beam re-pairing. Afterwards, it receives a BFRR sent by the second device, and / or receives a CBD-RS sent by the second device according to the CBD-RS configuration information. Then, based on the BFRR and / or the CBD-RS, it determines a third target beam to restore communication with the second device on the third target beam. This achieves the reselection of a beam to restore communication when beam failure occurs in SL communication, solving the problem that the existing beam management mechanism in Uu communication is not suitable for SL communication technology.

[0197] It should be noted that the information included in the CBD-RS mentioned above is the same as or similar to the information included in the BFD-RS mentioned above, and will not be repeated here.

[0198] It should also be noted that, based on the two optional implementation methods mentioned above, after sending the BFRQ to the second device, the method further includes:

[0199] If the number of retransmissions of the BFRQ is greater than the maximum number of retransmissions of the BFRQ, then the BFRQ is transmitted on the beam resource on which the BFRQ was transmitted or on the beam resource that was reselected for the BFRQ, and the beam failure recovery timer is used to keep track of the time.

[0200] If the beam failure recovery timer times out and no BFRR is received from the second device, then the beam resource is reselected and the BFRQ is sent to the second device, and the beam failure recovery counter is used to count.

[0201] If the value of the beam failure recovery counter is greater than or equal to the maximum number of beam failure recovery attempts, or if there are currently no beam resources that meet the conditions, then the communication connection with the second device is disconnected or released.

[0202] In other words, the BFRQ transmission mechanism is as follows: First, after the first device sends a BFRQ to the second device using the selected beam resource, the BFRQ transmission timer starts counting. Second, when the BFRQ transmission timer expires and no BFRR is received from the second device, the first device continues to retransmit the BFRQ to the peer UE using the same beam resource, the BFRQ transmission timer restarts, and the BFRQ counter starts counting. Third, when the BFRQ counter exceeds the maximum number of BFRQ retransmissions, a new beam resource is selected; or, the first device still sends a BFRQ to the second device using the same beam resource, and the beam failure recovery timer starts counting. Then, when the beam failure recovery timer expires and no BFRR is received from the second device, a new beam resource is selected to send a BFRQ to the second device, and the beam failure recovery counter starts counting. Finally, when the beam failure recovery counter reaches the maximum number of beam failure recovery attempts, or when there are no suitable beam resources available for selection, the direct link communication connection with the second device is disconnected or released.

[0203] In addition, prior to the two optional implementations mentioned above, the method also includes:

[0204] (1) The first device measures the BFD-RS, wherein the BFR is triggered when the measurement process meets the following conditions:

[0205] 1) Initialize the beam failure instance counter to 0. When a beam failure instance is detected, the beam failure detection timer starts counting and increments the beam failure instance counter by 1.

[0206] 2) If a beam failure instance is detected within the time window of the beam failure detection timer, the beam failure instance counter is incremented by 1 and the beam failure detection timer is restarted; otherwise, if no beam failure instance is detected after the beam failure detection timer expires, the beam failure instance counter is initialized to 0.

[0207] 3) When the number of beam failure instances exceeds the maximum number of beam failure instances, the beam failure recovery process is triggered;

[0208] Specifically, a beam failure instance must satisfy at least one of the following conditions: all BFD-RS signal quality (Layer 1 Reference Signal Received Power (L1-RSRP) / Layer 1 Signal to Noise and Interference Ratio (L1-SINR)) detected by the first device is below the beam quality threshold; or, the proportion of signals with quality below the beam quality threshold detected by the first device is higher than the beam failure instance threshold value Y.

[0209] (2) Based on the measurement results of CBD-RS, report the beam measurement results of at least one beam with good measurement results to the second device through the beam reporting resource of CBD-RS; the relevant explanations for this step are as follows:

[0210] On the one hand, beam quality detection can be based on the reference signal received power (RSRP), reference signal received quality (RSRQ), signal to noise and interference ratio (SINR), received signal strength indication (RSSI), and channel state information (CSI).

[0211] On the other hand, the beam report content shall include at least one of the following: beam indication information (beam index, channel state information resource indicator (CRI)), beam measurement information (measurement results of RSRP, RSRQ, SINR, RSSI, and CSI);

[0212] On the other hand, the beam report bearer method includes at least one of the following: SL physical layer signaling (PSFCH, PSCCH, PSSCH: 2nd SCI); PSSCH: SL Medium Access Control (MAC) Control Element (CE) / PC5 Radio Resource Control (RRC);

[0213] When carried by PSFCH, optionally, the time-frequency mapping position of the beam report can be obtained by the time-frequency resources occupied by the control channel when the first device sends the beam scanning channel, and / or the time-frequency resource position of the reference signal.

[0214] When carried by PSCCH / PSSCH, the time-frequency resources reported by the beam are associated with the time-frequency resources of the beam scanning channel of the first device in at least one of the following ways: the beam measurement auxiliary information indicated by the signaling of the first device is transmitted at the corresponding time-frequency location.

[0215] Based on the above optional implementation methods, as a specific implementation method, receiving the BFRR sent by the second device includes:

[0216] The BFRR is received within a latency bound using beam scanning; wherein the latency bound is a preset time length after the BFRQ is transmitted; here, the latency bound is configured or pre-configured by a higher layer; or,

[0217] The BFRR is received on time-frequency resources corresponding to the PSCCH and / or PSSCH resources carrying the BFRQ, where the time-frequency resources are, for example, PSFCH.

[0218] Based on the above-mentioned optional implementation methods, as another specific implementation method, a third target beam is determined according to the BFRR and / or the CBD-RS, including at least one of the following:

[0219] The CBD-RS transmitted by the second device is measured, and the third target beam is determined based on the measured value of the CBD-RS; for example, the third target beam is the beam with the largest measured value; it should be noted that in this case, after the first device determines the third target beam, it will also send the beam information of the new beam (the third target beam) to the second device through the beam reporting resource associated with the CBD-RS;

[0220] The third target beam is determined based on the beam information carried by the BFRR; for example, the BFRR carries the beam information of the new beam (third target beam) selected after the second device performs beam re-pairing.

[0221] According to the configuration information of the CBD-RS indicated by the BFRR, the CBD-RS sent by the second device is measured, and the third target beam is determined based on the measured value of the CBD-RS; that is, in this case, the BFRR sent by the second device carries the configuration information of the CBD-RS, and after receiving the BFRR, the first device receives the CBD-RS sent by the second device according to the configuration information of the CBD-RS carried in the BFRR, and measures the received CBD-RS to select the third target beam based on the measured value.

[0222] Based on the two optional implementation methods mentioned above, as an optional implementation method, the method further includes:

[0223] Based on the first information, obtain the configuration information of CBD-RS; the first information includes at least one of the following:

[0224] The high-level configuration parameters include beam failure configuration information and / or beam failure detection reference signal configuration information; that is, the first device obtains the time-domain, frequency-domain, and beam information of CBD-RS through the high-level configuration parameters "beam failure configuration information" or "beam failure reference signal configuration information".

[0225] Signaling exchange between the first device and the second device; that is: during the communication process (such as prior communication between the first device and the second device, or the beam maintenance process), the first device obtains the configuration information of the second device's CBD-RS through signaling exchange;

[0226] The BFRR sent by the second device, that is, the BFRR fed back by the second device to the first device, carries the configuration information of CBD-RS.

[0227] As mentioned above, as a specific implementation, the BFRQ is hosted on any of the following resources:

[0228] The beam reporting resources of the CBD-RS corresponding to the second target beam;

[0229] PSCCH and / or PSSCH resources.

[0230] In a more specific implementation, sending a beam failure recovery request (BFRQ) to the second device includes:

[0231] When the BFRQ is carried on PSCCH and / or PSSCH resources, the BFRQ is transmitted to the second device in the second target beam direction, either in beam scanning or in wide beam form, within the second time window.

[0232] The second time window is associated with the transmission resources of the CBD-RS, or the second time window is associated with the transmission resources of the BFD-RS.

[0233] For a more specific implementation method, the second time window is, for example, Figure 5 The time window indicated in the text refers to a time window configured or pre-configured by higher-layer parameters after the completion of each CBD-RS resource set transmission cycle. The start and duration of the time window are configured or pre-configured by higher-layer parameters. After completing the CBD-RS measurement, the first device needs to send a BFRQ to the second device within the time window corresponding to the resource set, either in a new beam direction, or in beam scanning, or in a wide beam format.

[0234] Alternatively, the second time window is Figure 7The time window indicated in the diagram is configured or pre-configured by higher-layer parameters after the BFD-RS resource set is transmitted in each cycle. Optionally, the start and duration of the time window are configured or pre-configured by higher-layer parameters. After triggering BFR, the first device continuously transmits BFRQ to the second device in the corresponding time window in the form of beam scanning (or, in wide beam or omnidirectional beam). The transmission mechanism of BFRQ will be explained later. If the first device does not receive BFRR, it can continue to transmit BFRQ in the next time window.

[0235] Embodiments of this application also provide a beam management method, which is applied to a second device (reference signal transmitter), such as... Figure 8 As shown, the method includes:

[0236] Step 801 includes one of the following operations:

[0237] The device receives a beam re-pairing request from a first device and sends a beam report to the first device. The beam report is used to assist the first device in beam management. Specifically, the first device can select a new beam based on the beam report and communicate with the second device on the new beam.

[0238] A BFD-RS is sent to the first device, which is used to assist the first device in beam management. Specifically, the first device can measure the received BFD-RS and determine whether to trigger BFR based on the measurement value. After triggering BFR, a new beam is selected through interaction with the second device, and communication with the second device is resumed on the selected new beam.

[0239] In the beam management method of this application embodiment, the second device receives a beam re-pairing request sent by the first device and sends a beam report to the first device so that the beam report can be used to assist the first device in beam management; or, the second device sends a BFD-RS to the first device, the BFD-RS being used to assist the first device in beam management. In this way, when a beam failure occurs during SL communication, a new beam is selected to restore communication between the first device and the second device, thus solving the problem that the existing beam management mechanism in Uu communication is not suitable for SL communication technology.

[0240] As an optional implementation, step 801, receiving the beam repair request sent by the first device and sending a beam report to the first device, includes:

[0241] The beam re-pairing request is received in a beam scanning manner. The beam re-pairing request carries a first reference signal, which is used for beam measurement. Specifically, this step is as follows: the second device receives the beam re-pairing request sent by the first device in the second resource pool (general resource pool) in a beam scanning manner.

[0242] It should be noted here that, in addition to the first reference signal, the beam re-pairing request sent by the first device may optionally also include other information mentioned above, such as reference signal indication information, beam measurement auxiliary information, Source ID, Destination ID, Zone ID, priority information, and 2 nd -stage SCI format and time-frequency domain information, MCS, MCS table indication, HARQ related information, one or more of the reserved bits, etc.;

[0243] The first reference signal is measured, and a candidate beam pair is selected based on the measured value of the first reference signal; here, for example, the candidate beam pair is a beam pair whose measured value is greater than a preset threshold.

[0244] The beam report is sent to the first device, the beam report including the measured value of the first reference signal and / or the beam information of the candidate beam pair.

[0245] Regarding the timing of beam report transmission: In one scenario, it can be obtained from the beam measurement auxiliary information carried by the first device in the beam re-pairing request, or configured or pre-configured by higher layers. Specifically: When the beam report indication in the beam re-pairing request carries time interval information, or the time interval information is configured or pre-configured by higher layers, the second device needs to determine the start position in the time domain for transmitting the beam report based on the carried time interval information; when the beam re-pairing request does not carry a beam report indication, the second device can determine whether all beam measurements have been completed based on the beam number information and / or beam resource indication information carried in the signaling sent by the first device, or the beam number information configured or pre-configured by higher layers, and then determine whether a beam report needs to be transmitted. In another scenario, if the signaling received by the second device contains feedback delay limit or time window information, or if the feedback delay limit or time window information is configured or pre-configured by higher-layer parameters, the second device should provide a corresponding beam report under the condition that the delay limit or time window is met. Here, the feedback delay limit is the upper limit of the beam measurement information feedback time, and the specific feedback time should be less than the feedback delay limit.

[0246] Furthermore, as an optional implementation, the method also includes:

[0247] Send periodic CBD-RS to the first device; or, referred to as: send CBD-RS periodically to the first device;

[0248] The second device receives a BFRQ sent by the first device. The BFRQ includes one or more of the following: beam fault event indication, candidate beam indication information, and the ID of the first device. Specifically, for example, the second device can receive the BFRQ on the beam reporting resources of the CBD-RS in a first resource pool (dedicated resource pool). Alternatively, the second device can receive the BFRQ in a time window (related to / corresponding to the CBD-RS resource set) in a second resource pool (communication resource pool), in a beam scanning form, a wide beam form, or an omnidirectional beam form.

[0249] In the beam direction corresponding to the second target beam, a BFRR is sent to the first device, where the second target beam is the beam that receives the BFRQ. Here, the second target beam is the beam in the candidate beam pair selected by the first device based on the measurement value of the received CBD-RS.

[0250] Furthermore, as another optional implementation, the method also includes:

[0251] Receive a BFRQ sent by a first device; wherein the BFRQ includes one or more of the following: beam fault event indication, ID of the first device, CBD-RS trigger request, second reference signal, and beam information; for example, this step is: the second device listens for and receives the BFRQ within the time window related to the transmission of the CBD-RS resource set;

[0252] In response to the BFRQ, a first operation is performed; wherein the first operation includes: sending CBD-RS, or beam re-pairing; that is, when the BFRQ carries a CBD-RS trigger request, the second device sends CBD-RS; when the BFRQ carries the second reference signal, the second device performs beam re-pairing.

[0253] Send a BFRR to the first device, and / or send a CBD-RS to the first device according to the CBD-RS configuration information; Optionally, when the first operation is to send a CBD-RS, the BFRR carries the CBD-RS configuration information, and when the first operation is to re-pair beams, the BFRR carries the beam information of the re-paired beam pair.

[0254] Furthermore, as an optional implementation, the method also includes:

[0255] Based on the higher-level configuration parameters, obtain the CBD-RS configuration information, which includes beam failure configuration information and / or beam failure detection reference signal configuration information; and / or,

[0256] The reference signal used for beam measurement is determined to be CBD-RS.

[0257] As an optional implementation, receiving a BFRQ sent by the first device includes at least one of the following:

[0258] The second device receives the BFRQ on the beam reporting resources of CBD-RS; specifically, the second device receives the BFRQ on the beam reporting resources of CBD-RS in the first resource pool (dedicated resource pool);

[0259] Within the second time window, the BFRQ is received in beam scanning, wide beam, or omnidirectional beam configuration. The second time window is associated with the transmission resources of the CBD-RS, or vice versa. As previously mentioned, the second time window is configured or pre-configured by higher-layer parameters after the completion of each CBD-RS resource set transmission cycle. The start and duration of the time window are configured or pre-configured by higher-layer parameters.

[0260] As an optional implementation, sending a BFRR to the first device includes at least one of the following:

[0261] When the BFRQ carries candidate beam indication information, the transmission resource of the BFRR is selected, and within the time delay limit, the BFRR is transmitted to the first device on the beam indicated by the candidate beam indication information.

[0262] When the BFRQ carries a CBD-RS trigger request, the resource for sending the BFRR is selected, and within the time delay limit, the BFRR is sent to the first device through the corresponding beam of the receiving beam of the BFRQ, or through a wide beam form, an omnidirectional beam form, or a beam scanning form.

[0263] When the second device responds to the BFRQ and performs beam re-pairing, it selects to send the resources of the BFRR, and within the time delay limit, sends the BFRR to the first device through the beam obtained by beam re-pairing, or through wide beam mode, omnidirectional beam mode, or beam scanning mode.

[0264] It should be noted here that, as mentioned above, the delay interval can be configured or pre-configured by a higher layer.

[0265] As a specific implementation, in response to the BFRQ, beam repairing is performed, including:

[0266] The second reference signal carried by the BFRQ is measured;

[0267] Candidate beam pairs are selected based on the measured values ​​of the second reference signal to obtain rematched beam pairs.

[0268] This application provides a beam failure recovery method for a through-link, addressing the distributed communication characteristics of SL. The method includes the design of mechanisms and processes for initial beam pairing, beam maintenance, and beam failure recovery to ensure that through-link devices can communicate via beams in FR2. This solves the problem of the inapplicability of existing beam management technologies in Uu communication.

[0269] Below, in conjunction with Figures 9 to 11 Three examples of the beam management method according to embodiments of this application will be described.

[0270] Example 1, such as Figure 9 As shown, the beam management process includes the following steps:

[0271] Step 901: The first device triggers beam failure detection;

[0272] Step 902: The first device sends a beam re-pairing request to the second device in the form of beam scanning;

[0273] Step 903: The second device measures the reference signal in the beam re-pairing request and performs beam re-pairing;

[0274] Step 904: The second device sends a beam report to the first device;

[0275] Step 905: The first device receives the beam report sent by the second device and obtains the new beam information;

[0276] Step 906: Establish a new beam pair between the first device and the second device to restore communication.

[0277] Example 2, such as Figure 10 As shown, the beam management process includes the following steps:

[0278] Step 1001: The first device triggers beam failure detection;

[0279] Step 1002: The second device periodically sends BFD-RS to the first device;

[0280] Step 1003: The first device starts the BFD process and checks according to the predetermined rules to determine whether it has entered the BFR stage. If so, proceed to step 1005.

[0281] Step 1004: The second device periodically sends CBD-RS data to the first device;

[0282] Step 1005: The first device receives and measures the CBD-RS signal, and selects a suitable new beam.

[0283] Step 1006: The first device sends a BFRQ (dedicated resource pool or communication resource pool) to the second device; that is: the first device selects a BFRQ transmission resource from the dedicated resource pool or communication resource pool, and sends the BFRQ to the second device on the selected resource;

[0284] Step 1007: The second device receives a BFRQ on the reporting resource or listens for a BFRQ within the time window;

[0285] Step 1008: The second device sends a BFRR to the first device on a new beam in the communication resource pool;

[0286] Step 1009: Establish a new beam pair between the first device and the second device to restore communication.

[0287] Example 3, such as Figure 11 As shown, the beam management process includes the following steps:

[0288] Step 1101: The first device triggers beam failure detection;

[0289] Step 1102: The second device periodically sends BFD-RS to the first device;

[0290] Step 1103: The first device starts the BFD process and checks according to the predetermined rules to determine whether it has entered the BFR stage. If so, proceed to step 1104.

[0291] Step 1104: The first device sends a BFRQ in the dedicated resource pool / general resource pool to trigger the transmission of CBD-RS or trigger beam re-pairing;

[0292] Step 1105A: The second device listens for and receives the BFRQ within the time window and triggers the transmission of CBD-RS according to the request;

[0293] Step 1105B: The second device receives and measures the RS quality of the BFRQ and establishes a new beam;

[0294] Step 1106: The second device sends CBD-RS to the first device, or sends BFRR, or sends both BFRR and CBD-RS;

[0295] Step 1107A: The first device receives and measures the CBD-RS signal, and selects a suitable new beam;

[0296] Step 1107B: The first device receives the new beam information from the BFRR;

[0297] Step 1108: Establish a new beam pair between the first device and the second device to restore communication.

[0298] Embodiments of this application also provide a beam management device applied to a first device, such as... Figure 12 As shown, the device includes:

[0299] Processing module 1201 is used to perform one of the following operations after beam failure detection:

[0300] Send a beam re-pairing request to the second device and perform beam management based on the beam report sent by the second device;

[0301] The beam failure detection reference signal (BFD-RS) sent by the second device is measured, and beam management is performed based on the measured value of the BFD-RS.

[0302] Optionally, the triggering condition for the beam failure detection includes at least one of the following:

[0303] The first device achieves the preset conditions;

[0304] All measured values ​​of the beam reference signal transmitted by the second device and measured by the first device are below the first threshold.

[0305] Among the measured values ​​of the beam reference signal transmitted by the second device, which are measured by the first device, the proportion of measured values ​​below the second threshold is greater than the first threshold value among all measured values.

[0306] The sum of the number of times the first device receives a negative response from the second device and the number of times it does not receive a response from the second device is greater than or equal to N; N is a positive integer.

[0307] Optionally, when the processing module 1201 executes the request to send a beam re-pairing to the second device, it is specifically used for:

[0308] The beam re-pairing request is sent to the second device in a beam scanning manner. The beam re-pairing request carries a first reference signal, which is used for beam measurement.

[0309] Optionally, the device further includes at least one of the following:

[0310] The first receiving module is configured to receive the beam report within a first time window after sending the beam re-pairing request; the first time window is associated with the transmission resources of the beam re-pairing request.

[0311] The second receiving module is configured to receive the beam report on the beam report resources corresponding to the Physical Straight-through Link Control Channel (PSCCH) and / or the Physical Straight-through Link Shared Channel (PSSCH) that carry the beam re-pairing request.

[0312] Optionally, when the processing module 1201 performs beam management based on the beam report sent by the second device, it is specifically used for:

[0313] Based on the beam information carried in the beam report, obtain the first target beam;

[0314] Resume communication with the second device on the first target beam.

[0315] Optionally, the device further includes at least one of the following:

[0316] The first acquisition module is used to acquire the configuration information of the BFD-RS according to the higher-level configuration parameters; the higher-level configuration parameters include beam failure configuration information and / or beam failure detection reference signal configuration information.

[0317] The second acquisition module is used to acquire the configuration information of the BFD-RS based on the signaling exchanged between the first device and the second device;

[0318] The determination module is used to determine the set of periodic reference signals that are quasi-co-located with the demodulated reference signal DMRS carried by PSCCH and / or PSSCH as BFD-RS.

[0319] Optionally, when the processing module 1201 performs beam management based on the BFD-RS measurements, it is specifically used for:

[0320] In the event that beam failure recovery (BFR) is triggered based on the measured value of the BFD-RS, the candidate beam detection reference signal (CBD-RS) sent by the second device is measured according to the configuration information of the CBD-RS.

[0321] Based on the measurements of the CBD-RS, candidate beam pairs are obtained;

[0322] In the direction of the second target beam, a beam failure recovery request (BFRQ) is sent to the second device. The BFRQ includes one or more of the following: beam failure event indication, candidate beam indication information, and the identifier ID of the first device. The candidate beam pair includes the second target beam.

[0323] In the beam direction corresponding to the second target beam, receive the beam failure recovery response (BFRR) sent by the second device;

[0324] Upon receiving the BFRR, communication with the second device is restored on the second target beam.

[0325] Optionally, when the processing module 1201 performs beam management based on the BFD-RS measurements, it is specifically used for:

[0326] If BFR is triggered based on the BFD-RS measurement, a BFRQ is sent to the second device. The BFRQ is used to trigger the second device to perform a first operation, which includes sending CBD-RS or beam re-pairing.

[0327] Receive BFRR sent by the second device, and / or, according to the CBD-RS configuration information, receive CBD-RS sent by the second device;

[0328] The third target beam is determined based on the BFRR and / or the CBD-RS;

[0329] Communication with the second device is restored on the third target beam;

[0330] The BFRQ includes one or more of the following: beam fault event indication, ID of the first device, CBD-RS trigger request, second reference signal, and beam information.

[0331] Optionally, when the processing module 1201 receives the BFRR sent by the second device, it is specifically used for:

[0332] The BFRR is received within a time delay limit using beam scanning; wherein the time delay limit is a preset time length after the BFRQ is transmitted; or,

[0333] The BFRR is received on the time-frequency resources corresponding to the PSCCH and / or PSSCH resources carrying the BFRQ.

[0334] Optionally, when the processing module 1201 determines the third target beam based on the BFRR and / or the CBD-RS, it specifically performs at least one of the following:

[0335] The CBD-RS transmitted by the second device is measured, and the third target beam is determined based on the measured value of the CBD-RS;

[0336] The third target beam is determined based on the beam information carried by the BFRR;

[0337] Based on the configuration information of the CBD-RS indicated by the BFRR, the CBD-RS transmitted by the second device is measured, and the third target beam is determined based on the measured value of the CBD-RS.

[0338] Optionally, the device further includes:

[0339] The third acquisition module is used to acquire the configuration information of CBD-RS based on the first information; the first information includes at least one of the following:

[0340] High-level configuration parameters, including beam failure configuration information and / or beam failure detection reference signal configuration information;

[0341] Signaling exchanged between the first and second devices;

[0342] The second device sends the BFRR.

[0343] Optionally, the BFRQ is carried on any of the following resources:

[0344] The beam reporting resources of the CBD-RS corresponding to the second target beam;

[0345] PSCCH and / or PSSCH resources.

[0346] Optionally, when the processing module 1201 sends a beam failure recovery request (BFRQ) to the second device, it is specifically used for:

[0347] When the BFRQ is carried on PSCCH and / or PSSCH resources, the BFRQ is transmitted to the second device in the second target beam direction, either in beam scanning or in wide beam form, within the second time window.

[0348] The second time window is associated with the transmission resources of the CBD-RS, or the second time window is associated with the transmission resources of the BFD-RS.

[0349] It should be noted that the beam management device provided in this application embodiment can implement all the method steps implemented in the beam management method embodiment applied to the first device, and can achieve the same technical effect. Here, the parts that are the same as those in the method embodiment and the beneficial effects will not be described in detail.

[0350] Embodiments of this application also provide a beam management device applied to a second device, such as... Figure 13 As shown, the beam management device 1300 includes one of the following modules:

[0351] The transceiver module 1301 is used to receive a beam repairing request sent by the first device and send a beam report to the first device. The beam report is used to assist the first device in beam management.

[0352] The first transmitting module 1302 is used to transmit BFD-RS to the first device, wherein the BFD-RS is used to assist the first device in beam management.

[0353] Optionally, the transceiver module 1301 includes:

[0354] The first receiving submodule is configured to receive the beam re-pairing request in a beam scanning manner. The beam re-pairing request carries a first reference signal, which is used for beam measurement.

[0355] The measurement submodule is used to measure the first reference signal and select candidate beam pairs based on the measured value of the first reference signal.

[0356] A first transmitting submodule is configured to transmit the beam report to the first device, the beam report including the measured value of the first reference signal and / or the beam information of the candidate beam pair.

[0357] Optionally, the device further includes:

[0358] The second transmitting module is used to periodically transmit CBD-RS to the first device;

[0359] The first receiving module is configured to receive a BFRQ sent by the first device, wherein the BFRQ includes one or more of the following: beam fault event indication, candidate beam indication information, and the ID of the first device.

[0360] The third transmitting module is used to transmit BFRR to the first device in the beam direction corresponding to the second target beam, wherein the second target beam is the beam that receives the BFRQ.

[0361] Optionally, the device further includes:

[0362] The second receiving module is used to receive the BFRQ sent by the first device; wherein the BFRQ includes one or more of the following: beam fault event indication, ID of the first device, CBD-RS trigger request, second reference signal and beam information;

[0363] An execution module is configured to perform a first operation in response to the BFRQ; wherein the first operation includes: transmitting CBD-RS, or beam re-pairing;

[0364] The fourth transmitting module is used to transmit BFRR to the first device and / or transmit CBD-RS to the first device according to the CBD-RS configuration information; wherein, when the first operation is transmitting CBD-RS, the BFRR carries the CBD-RS configuration information, and when the first operation is beam re-pairing, the BFRR carries the beam information of the re-paired beam pair.

[0365] Optionally, the device further includes:

[0366] The acquisition module is used to acquire the configuration information of the CBD-RS based on higher-layer configuration parameters, wherein the higher-layer configuration parameters include beam failure configuration information and / or beam failure detection reference signal configuration information; and / or,

[0367] The determination module is used to determine the reference signal used for beam measurement as CBD-RS.

[0368] Optionally, the first receiving module or the second receiving module is specifically configured to perform at least one of the following:

[0369] The second receiving submodule is used to receive the BFRQ on the beam reporting resources of the CBD-RS;

[0370] The third receiving submodule is used to receive the BFRQ in a beam scanning form, a wide beam form, or an omnidirectional beam form within the second time window.

[0371] The second time window is associated with the transmission resources of the CBD-RS, or the second time window is associated with the transmission resources of the BFD-RS.

[0372] Optionally, the third sending module or the fourth sending module is specifically used to perform at least one of the following:

[0373] When the BFRQ carries candidate beam indication information, the transmission resource of the BFRR is selected, and within the time delay limit, the BFRR is transmitted to the first device on the beam indicated by the candidate beam indication information.

[0374] When the BFRQ carries a CBD-RS trigger request, the resource for sending the BFRR is selected, and within the time delay limit, the BFRR is sent to the first device through the corresponding beam of the receiving beam of the BFRQ, or through a wide beam form, an omnidirectional beam form, or a beam scanning form.

[0375] When the second device responds to the BFRQ and performs beam re-pairing, it selects to send the resources of the BFRR, and within the time delay limit, sends the BFRR to the first device through the beam obtained by beam re-pairing, or through wide beam mode, omnidirectional beam mode, or beam scanning mode.

[0376] Optionally, when the execution module performs beam repairing in response to the BFRQ, it is specifically used for:

[0377] The second reference signal carried by the BFRQ is measured;

[0378] Candidate beam pairs are selected based on the measured values ​​of the second reference signal to obtain rematched beam pairs.

[0379] It should be noted that the beam management device provided in this application embodiment can implement all the method steps implemented in the beam management method embodiment applied to the second device, and can achieve the same technical effect. Here, the parts that are the same as those in the method embodiment and the beneficial effects will not be described in detail.

[0380] An embodiment of this application also provides a beam management device, including a transceiver, a memory, a processor, and a computer program stored in the memory and running on the processor. When the processor executes the computer program, it implements the beam management method applied to a first device as described above, or implements the beam management method applied to a second device as described above, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0381] In addition, this application embodiment also provides a computer-readable storage medium storing a program. When executed by a processor, the program implements the various processes described above for the beam management method embodiment applied to the first device, or implements the various processes described above for the beam management method embodiment applied to the second device, achieving the same technical effect. To avoid repetition, further details are omitted here. The computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, etc.

[0382] Embodiments of this application also provide a computer program product, including computer instructions. When the computer instructions are executed by a processor, they implement the beam management method applied to a first device as described above, or implement the beam management method applied to a second device as described above, and achieve the same technical effect. To avoid repetition, further details are omitted here.

[0383] The above description is the preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principles described in this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A beam management method, characterized in that, Applied to a first device, the method includes: After beam failure detection, perform one of the following operations: Send a beam re-pairing request to the second device and perform beam management based on the beam report sent by the second device; The beam failure detection reference signal (BFD-RS) sent by the second device is measured, and beam management is performed based on the measured value of the BFD-RS.

2. The method according to claim 1, characterized in that, The triggering conditions for beam failure detection include at least one of the following: The first device achieves the preset conditions; All measured values ​​of the beam reference signal transmitted by the second device and measured by the first device are below the first threshold. Among the measured values ​​of the beam reference signal transmitted by the second device, which are measured by the first device, the proportion of measured values ​​below the second threshold is greater than the first threshold value among all measured values. The sum of the number of times the first device receives a negative response from the second device and the number of times it does not receive a response from the second device is greater than or equal to N; N is a positive integer.

3. The method according to claim 1, characterized in that, Sending a beam re-pairing request to the second device includes: The beam re-pairing request is sent to the second device in a beam scanning manner. The beam re-pairing request carries a first reference signal, which is used for beam measurement.

4. The method according to claim 1 or 3, characterized in that, The method further includes at least one of the following: After sending the beam re-pairing request, the beam report is received within a first time window; the first time window is associated with the transmission resource of the beam re-pairing request. The beam report is received on the beam report resource corresponding to the Physical Straight-through Link Control Channel (PSCCH) and / or the Physical Straight-through Link Shared Channel (PSSCH) that carries the beam re-pairing request.

5. The method according to claim 1, characterized in that, Beam management is performed based on the beam report sent by the second device, including: Based on the beam information carried in the beam report, obtain the first target beam; Resume communication with the second device on the first target beam.

6. The method according to claim 1, characterized in that, The method further includes at least one of the following: Based on the high-level configuration parameters, the configuration information of the BFD-RS is obtained; the high-level configuration parameters include beam failure configuration information and / or beam failure detection reference signal configuration information. Based on the signaling exchanged between the first device and the second device, the configuration information of the BFD-RS is obtained; The set of periodic reference signals that are quasi-co-located with the demodulation reference signal DMRS carried by PSCCH and / or PSSCH is defined as BFD-RS.

7. The method according to claim 1, characterized in that, Beam management based on the BFD-RS measurements includes: In the case of triggering beam failure recovery (BFR) based on the measured value of BFD-RS, the periodic candidate beam detection reference signal (CBD-RS) sent by the second device is measured according to the configuration information of CBD-RS. Based on the measurements of the CBD-RS, candidate beam pairs are obtained; In the direction of the second target beam, a beam failure recovery request (BFRQ) is sent to the second device. The BFRQ includes one or more of the following: beam failure event indication, candidate beam indication information, and the identifier ID of the first device. The candidate beam pair includes the second target beam. In the beam direction corresponding to the second target beam, receive the beam failure recovery response (BFRR) sent by the second device; Upon receiving the BFRR, communication with the second device is restored on the second target beam.

8. The method according to claim 1, characterized in that, Beam management based on the BFD-RS measurements includes: If BFR is triggered based on the BFD-RS measurement, a BFRQ is sent to the second device. The BFRQ is used to trigger the second device to perform a first operation, which includes sending CBD-RS or beam re-pairing. Receive BFRR sent by the second device, and / or, according to the CBD-RS configuration information, receive CBD-RS sent by the second device; The third target beam is determined based on the BFRR and / or the CBD-RS; Communication with the second device is restored on the third target beam; The BFRQ includes one or more of the following: beam fault event indication, ID of the first device, CBD-RS trigger request, second reference signal, and beam information.

9. The method according to claim 8, characterized in that, Receiving the BFRR sent by the second device includes: The BFRR is received within a time delay limit using beam scanning; wherein the time delay limit is a preset time length after the BFRQ is transmitted; or, The BFRR is received on the time-frequency resources corresponding to the PSCCH and / or PSSCH resources carrying the BFRQ.

10. The method according to claim 8, characterized in that, The third target beam is determined based on the BFRR and / or the CBD-RS, including at least one of the following: The CBD-RS transmitted by the second device is measured, and the third target beam is determined based on the measured value of the CBD-RS; The third target beam is determined based on the beam information carried by the BFRR; Based on the configuration information of the CBD-RS indicated by the BFRR, the CBD-RS transmitted by the second device is measured, and the third target beam is determined based on the measured value of the CBD-RS.

11. The method according to claim 7 or 8, characterized in that, The method further includes: Based on the first information, obtain the configuration information of CBD-RS; the first information includes at least one of the following: High-level configuration parameters, including beam failure configuration information and / or beam failure detection reference signal configuration information; Signaling exchanged between the first and second devices; The second device sends the BFRR.

12. The method according to claim 7 or 8, characterized in that, The BFRQ is hosted on any of the following resources: The beam reporting resources of the CBD-RS corresponding to the second target beam; PSCCH and / or PSSCH resources.

13. The method according to claim 12, characterized in that, Sending a beam failure recovery request (BFRQ) to the second device, including: When the BFRQ is carried on PSCCH and / or PSSCH resources, the BFRQ is transmitted to the second device in the second target beam direction, either in beam scanning or in wide beam form, within the second time window. The second time window is associated with the transmission resources of the CBD-RS, or the second time window is associated with the transmission resources of the BFD-RS.

14. A beam management method, characterized in that, When applied to a second device, the method includes one of the following operations: Receive a beam repair request sent by a first device and send a beam report to the first device, the beam report being used to assist the first device in beam management; A BFD-RS is sent to the first device, which is used to assist the first device in beam management.

15. The method according to claim 14, characterized in that, Receive a beam repair request sent by the first device and send a beam report to the first device, including: The beam re-pairing request is received in a beam scanning manner. The beam re-pairing request carries a first reference signal, which is used for beam measurement. The first reference signal is measured, and candidate beam pairs are selected based on the measured value of the first reference signal; The beam report is sent to the first device, the beam report including the measured value of the first reference signal and / or the beam information of the candidate beam pair.

16. The method according to claim 14, characterized in that, The method further includes: Send periodic CBD-RS to the first device; Receive a BFRQ sent by the first device, wherein the BFRQ includes one or more of the following: beam failure event indication, candidate beam indication information, and the ID of the first device; In the beam direction corresponding to the second target beam, a BFRR is sent to the first device, where the second target beam is the beam that receives the BFRQ.

17. The method according to claim 14, characterized in that, The method further includes: Receive a BFRQ sent by a first device; wherein the BFRQ includes one or more of the following: beam fault event indication, ID of the first device, CBD-RS trigger request, second reference signal, and beam information; In response to the BFRQ, a first operation is performed; wherein the first operation includes: transmitting CBD-RS, or beam re-pairing; Send a BFRR to the first device, and / or send a CBD-RS to the first device according to the CBD-RS configuration information; wherein, when the first operation is to send a CBD-RS, the BFRR carries the CBD-RS configuration information, and when the first operation is to re-pair beams, the BFRR carries the beam information of the re-paired beam pair.

18. The method according to claim 17, characterized in that, The method further includes: Based on the higher-level configuration parameters, obtain the CBD-RS configuration information, which includes beam failure configuration information and / or beam failure detection reference signal configuration information; and / or, The reference signal used for beam measurement is determined to be CBD-RS.

19. The method according to claim 16 or 17, characterized in that, Receiving a BFRQ sent by the first device includes at least one of the following: The BFRQ is received on the beam reporting resource of CBD-RS; Within the second time window, the BFRQ is received in beam scanning, wide beam, or omnidirectional beam form. The second time window is associated with the transmission resources of the CBD-RS, or the second time window is associated with the transmission resources of the BFD-RS.

20. The method according to claim 16 or 17, characterized in that, Sending a BFRR to the first device includes at least one of the following: When the BFRQ carries candidate beam indication information, the transmission resource of the BFRR is selected, and within the time delay limit, the BFRR is transmitted to the first device on the beam indicated by the candidate beam indication information. When the BFRQ carries a CBD-RS trigger request, the resource for sending the BFRR is selected, and within the time delay limit, the BFRR is sent to the first device through the corresponding beam of the receiving beam of the BFRQ, or through a wide beam form, an omnidirectional beam form, or a beam scanning form. When the second device responds to the BFRQ and performs beam re-pairing, it selects to send the resources of the BFRR, and within the time delay limit, sends the BFRR to the first device through the beam obtained by beam re-pairing, or through wide beam mode, omnidirectional beam mode, or beam scanning mode.

21. The method according to claim 17, characterized in that, In response to the BFRQ, beam repairing is performed, including: The second reference signal carried by the BFRQ is measured; Candidate beam pairs are selected based on the measured values ​​of the second reference signal to obtain rematched beam pairs.

22. A beam management device, characterized in that, Applied to a first device, the device includes: The processing module is used to perform one of the following operations after beam failure detection: Send a beam re-pairing request to the second device and perform beam management based on the beam report sent by the second device; The beam failure detection reference signal (BFD-RS) sent by the second device is measured, and beam management is performed based on the measured value of the BFD-RS.

23. A beam management device, characterized in that, Applied to a second device, the device includes one of the following modules: The transceiver module is used to receive a beam repairing request sent by the first device and send a beam report to the first device. The beam report is used to assist the first device in beam management. The first transmitting module is used to transmit BFD-RS to the first device, wherein the BFD-RS is used to assist the first device in beam management.

24. A beam management device, comprising a transceiver, a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that, When the processor executes the computer program, it implements the beam management method as described in any one of claims 1 to 13, or implements the beam management method as described in any one of claims 14 to 21.

25. A readable storage medium having a program or instructions stored thereon, characterized in that, When the program or instructions are executed by the processor, they implement the beam management method as described in any one of claims 1 to 13, or implement the beam management method as described in any one of claims 14 to 21.

26. A computer program product, characterized in that, Includes computer instructions, which, when executed by a processor, implement the beam management method as described in any one of claims 1 to 13, or The beam management method as described in any one of claims 14 to 21 is implemented.

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