Beam failure recovery method, device and storage medium

Abstract

The present disclosure relates to a beam failure recovery method, an apparatus, and a storage medium. The beam failure recovery method is applied to a terminal, and includes: performing beam failure detection for a plurality of TRPs in response to the terminal being configured with the plurality of TRPs; and triggering beam failure recovery based on random access in response to detecting the presence of a first TRP in which a beam failure occurs among the plurality of TRPs. According to the present disclosure, the beam failure recovery based on random access is realized in a timely manner in a plurality of TRP scenario, and the timeliness and effectiveness of the beam failure recovery are guaranteed.

Description

[Technical field]

[0001] The present disclosure relates to the field of communications technology, and more particularly to a beam failure recovery method, apparatus and storage medium. [Background technology]

[0002] In the new radio technology (New Radio, NR), for example, when the communication frequency band is frequency range 2, beam-based transmission and reception must be used to ensure coverage range because high-frequency channels attenuate quickly.

[0003] In the related art, a network device is configured with multiple transmission and reception points (TRPs). When a network device has multiple TRPs, the network device can provide services to a terminal using the multiple TRPs, for example, can transmit a physical downlink control channel (PDCCH) to the terminal using the multiple TRPs. The network device transmits a PDCCH to the terminal using the TRPs, and the terminal detects a reference signal resource for failure detection. When the terminal detects that a radio link value of a reference signal for failure detection is lower than a threshold, it needs to transmit a beam failure recovery (BFR) request to the network device to perform BFR.

[0004] In the related art, a cell-level BFR is defined. For example, a BFR for a (Special cell, SpCell) is defined. The Special cell includes a Primary cell (Pcell) and a Primary secondary cell (PScell). The BFR mechanism for the SpCell is a random access BFR mechanism, and when the terminal detects that a beam failure occurs in the SpCell, it initiates a random access process to request beam recovery. In addition, for example, a secondary cell (SCell)-level BFR is defined, and the mechanism is a physical uplink control channel (PUCCH)-scheduling request (SR) mechanism and / or a physical uplink shared channel (PUSCH)-medium access control (MAC) control element (CE) mechanism, that is, when the terminal detects that a beam failure occurs in the Scell, it transmits MAC CE information on a PUSCH resource to indicate beam failure recovery related information. However, the PUSCH resource may be a PUCCH-SR resource dedicated to BFR for transmitting a scheduling request, or may be another PUSCH resource.

[0005] In the related art, a TRP-level BFR (TRP-specific BFR) is proposed, that is, when a terminal is configured for multi-TRP PDCCH transmission, if a beam failure occurs in a certain TRP, the terminal can send a beam failure recovery request to inform a network device that a beam failure has occurred in the TRP and request a BFR. Currently, the TRP-specific BFR is agreed to realize a beam failure recovery request using a PUCCH-SR and / or PUSCH MAC CE mechanism based on the SCell. However, for an SpCell, if a beam failure occurs in multiple TRPs, whether and how to trigger a random access-based beam failure recovery request is an issue to be resolved. Summary of the Invention [Problem to be solved by the invention]

[0006] To overcome the problems existing in the related art, the present disclosure provides a beam failure recovery method, apparatus and storage medium.

[0007] According to a first aspect of an embodiment of the present disclosure, there is provided a beam failure recovery method, applied to a terminal, the method comprising: The method includes the steps of: performing beam failure detection for the plurality of TRPs in response to the plurality of TRPs being configured in the terminal; and triggering beam failure recovery based on random access in response to detecting the presence of a first TRP in which a beam failure has occurred among the plurality of TRPs.

[0008] In one embodiment, prior to the step of triggering random access based beam failure recovery, the method further comprises the step of determining that a trigger condition for triggering random access beam failure recovery is met.

[0009] In one embodiment, the step of determining that a trigger condition for triggering random access beam failure recovery is met comprises: The method includes determining that a trigger condition for triggering random access beam failure recovery is met in response to detecting the presence of a second TRP in which a beam failure has occurred in the plurality of TRPs after a first time and before a second time, wherein the first time is the time when it is detected that a beam failure has occurred in the first TRP and the second time is the time when a scheduling request is transmitted on a physical uplink control channel resource.

[0010] In one embodiment, the step of determining that a trigger condition for triggering random access beam failure recovery is met comprises: The method includes determining that a trigger condition for triggering random access beam failure recovery is satisfied in response to detecting the presence of a second TRP in which a beam failure has occurred in the plurality of TRPs before a third time, the third time being a time when first downlink control information for scheduling a physical uplink shared channel is received.

[0011] In one embodiment, the step of determining that a trigger condition for triggering random access beam failure recovery is met comprises: The method further includes determining that a trigger condition for triggering random access beam failure recovery is met in response to any downlink control information not being received within a first duration after a second time, the second time being the time when a scheduling request was transmitted on the physical uplink control channel resource.

[0012] In one embodiment, the step of determining that a trigger condition for triggering random access beam failure recovery is met comprises: The method includes determining that a trigger condition for triggering random access beam failure recovery is met in response to detecting the presence of a second TRP in which a beam failure has occurred in the plurality of TRPs before a fourth time, the fourth time being a time when media access control control element (MAC CE) information related to the TRP in which the beam failure has occurred is transmitted on a first physical uplink shared channel.

[0013] In one embodiment, the step of determining that a trigger condition for triggering random access beam failure recovery is met comprises: determining, in response to a beam corresponding to the first physical uplink shared channel being a beam in which a beam failure has occurred, that a trigger condition for triggering a random access beam failure recovery is satisfied; The first physical uplink shared channel is a Type 1 or Type 2 physical uplink shared channel scheduled by the first downlink control information or configured grant.

[0014] In one embodiment, the step of determining that a trigger condition for triggering random access beam failure recovery is met comprises: The method includes determining that a trigger condition for triggering random access beam failure recovery is met in response to detecting the presence of a second TRP in which a beam failure has occurred in the plurality of TRPs before a fifth time, the fifth time being a time when second downlink control information is received, the second downlink control information being used to determine that the network device has received the MAC CE information.

[0015] In one embodiment, the second downlink control information is used to schedule a second physical uplink shared channel; A hybrid automatic repeat request identifier of a second physical uplink shared channel scheduled by the second downlink control information is the same as a hybrid automatic repeat request identifier of a first physical uplink shared channel, the first physical uplink shared channel is a physical uplink shared channel for transmitting media access control control element (MAC CE) information related to a TRP in which a beam failure occurs, and / or a new data indication of the second physical uplink shared channel scheduled by the second downlink control information changes.

[0016] In one embodiment, the step of determining that a trigger condition is met for triggering a random access beam failure recovery request comprises: The method further includes determining that a trigger condition is met for triggering random access beam failure recovery in response to any downlink control information not being received within a second time length after a fourth time, the fourth time being a time when media access control control element (MAC CE) information associated with the TRP in which the beam failure occurred is transmitted on the first physical uplink shared channel.

[0017] In one embodiment, the step of determining that a trigger condition for triggering random access beam failure recovery is met comprises: The method includes determining that a trigger condition is satisfied to trigger random access beam failure recovery in response to detecting the presence of a second TRP in which a beam failure has occurred in the plurality of TRPs before a sixth time, the sixth time being the time when the beam of the first TRP is updated.

[0018] In one embodiment, the method further includes triggering a TRP-level beam failure recovery in response to again detecting the presence of a second TRP in which a beam failure has occurred in the plurality of TRPs after the sixth time period.

[0019] In one embodiment, triggering beam failure recovery of the TRP level comprises: Triggering beam failure recovery based on a physical uplink control channel scheduling request (PUCCH-SR) and / or a physical uplink shared channel medium access control control element (PUSCH MAC CE).

[0020] In one embodiment, the method further comprises the step of triggering a beam failure recovery of the TRP level or not triggering a beam failure recovery of the TRP level.

[0021] In one embodiment, multiple TRPs being configured in the terminal includes multiple reference signal resource sets for beam failure detection being configured in the terminal, and / or multiple control resource pool index values ​​being configured in the terminal.

[0022] According to a second aspect of an embodiment of the present disclosure, there is provided a beam failure recovery apparatus, the apparatus comprising: The terminal includes a detecting unit configured to perform beam failure detection for the multiple TRPs when the multiple TRPs are configured in the terminal, and a processing unit configured to trigger beam failure recovery based on random access when the detecting unit detects the presence of a first TRP in which a beam failure has occurred among the multiple TRPs.

[0023] In an embodiment, the processing unit is further configured to determine that a trigger condition for triggering random access beam failure recovery is met prior to triggering random access based beam failure recovery.

[0024] In one embodiment, in response to the detecting unit detecting the presence of a second TRP in which a beam failure has occurred in the plurality of TRPs before a second time, the processing unit determines that a trigger condition for triggering random access beam failure recovery is met, the second time being the time when a scheduling request is transmitted on a physical uplink control channel resource.

[0025] In one embodiment, in response to the detecting unit detecting the presence of a second TRP in which a beam failure has occurred in the plurality of TRPs before a third time, the processing unit determines that a trigger condition for triggering random access beam failure recovery is met, and the third time is a time when first downlink control information for scheduling a physical uplink shared channel is received.

[0026] In one embodiment, in response to not receiving any downlink control information within a first length of time after a second time, the processing unit determines that a trigger condition is met to trigger random access beam failure recovery, the second time being the time when a scheduling request was transmitted on the physical uplink control channel resource.

[0027] In one embodiment, in response to the detecting unit detecting the presence of a second TRP in which a beam failure has occurred in the plurality of TRPs before a fourth time, the processing unit determines that a trigger condition is met to trigger random access beam failure recovery, the fourth time being a time when media access control control element (MAC CE) information related to the TRP in which the beam failure has occurred is transmitted on a first physical uplink shared channel.

[0028] In one embodiment, in response to a beam corresponding to the first physical uplink shared channel being a beam in which a beam failure has occurred, a processing unit determines that a trigger condition for triggering a random access beam failure recovery is satisfied; The first physical uplink shared channel is a Type 1 or Type 2 physical uplink shared channel scheduled by the first downlink control information or configured grant.

[0029] In one embodiment, in response to the detecting unit detecting the presence of a second TRP in which a beam failure has occurred in the plurality of TRPs before a fifth time, the processing unit determines that a trigger condition for triggering random access beam failure recovery is met, the fifth time being a time when second downlink control information is received, and the second downlink control information is used to determine that the network device has received the MAC CE information.

[0030] In one embodiment, the second downlink control information is used to schedule a second physical uplink shared channel; A hybrid automatic repeat request identifier of a second physical uplink shared channel scheduled by the second downlink control information is the same as a hybrid automatic repeat request identifier of a first physical uplink shared channel, the first physical uplink shared channel is a physical uplink shared channel for transmitting media access control control element (MAC CE) information related to a TRP in which a beam failure occurs, and / or a new data indication of the second physical uplink shared channel scheduled by the second downlink control information changes.

[0031] In one embodiment, in response to not receiving any downlink control information within a second time length after a fourth time, the processing unit determines that a trigger condition is met to trigger random access beam failure recovery, the fourth time being the time that media access control control element (MAC CE) information associated with the TRP in which the beam failure occurred was transmitted on the first physical uplink shared channel.

[0032] In one embodiment, a trigger condition for triggering random access beam failure recovery is determined to be met in response to the detecting unit detecting the presence of a second TRP in which a beam failure has occurred in the plurality of TRPs prior to a sixth time, the sixth time being the time when the beam of the first TRP is updated.

[0033] In one embodiment, in response to the detecting unit again detecting the presence of a second TRP in which a beam failure has occurred in the plurality of TRPs after the sixth time period, the processing unit triggers a beam failure recovery at the TRP level.

[0034] In one embodiment, triggering the TRP-level beam failure recovery includes triggering beam failure recovery based on a physical uplink control channel scheduling request (PUCCH-SR) and / or a physical uplink shared channel medium access control control element (PUSCH MAC CE).

[0035] In an embodiment, the processing unit is further used to trigger a beam failure recovery of a TRP level or not trigger a beam failure recovery of a TRP level.

[0036] In one embodiment, multiple TRPs being configured in the terminal includes multiple reference signal resource sets for beam failure detection being configured in the terminal, and / or multiple control resource pool index values ​​being configured in the terminal.

[0037] According to a third aspect of an embodiment of the present disclosure, there is provided a beam failure recovery apparatus, the apparatus comprising: a processor and a memory for storing instructions executable by the processor; The processor is configured to perform the beam failure recovery method according to the first aspect or any embodiment of the first aspect.

[0038] According to a fourth aspect of an embodiment of the present disclosure, there is provided a storage medium having instructions stored thereon, the instructions in the storage medium, when executed by a processor of a terminal, enabling the terminal to perform a beam failure recovery method as described in the first aspect or any embodiment of the first aspect.

[0039] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects: When multiple TRPs are configured in a terminal, perform beam failure detection for the multiple TRPs, and trigger beam failure recovery based on random access when it is detected that a TRP with beam failure occurs in the multiple TRPs, thereby realizing timely beam failure recovery based on random access in the scenario of multiple TRPs, and ensuring the timeliness and effectiveness of beam failure recovery.

[0040] It should be noted that the above general description and the following detailed description are merely illustrative and explanatory and do not limit the present disclosure. [Brief description of the drawings]

[0041] The drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification serve to explain the principles of the present disclosure. [Figure 1] 1 is a schematic diagram of a wireless communication system according to one exemplary embodiment; [Diagram 2] 1 is a flowchart of a BFR method according to an exemplary embodiment. [Diagram 3] 1 is a flowchart of a BFR method according to an exemplary embodiment. [Figure 4] 1 is a flowchart of a BFR method according to an exemplary embodiment. [Diagram 5] 1 is a flowchart of a BFR method according to an exemplary embodiment. [Figure 6] 1 is a flowchart of a BFR method according to an exemplary embodiment. [Figure 7] 1 is a flowchart of a BFR method according to an exemplary embodiment. [Figure 8] 1 is a flowchart of a BFR method according to an exemplary embodiment. [Figure 9] 1 is a flowchart of a BFR method according to an exemplary embodiment. [Figure 10] 1 is a flowchart of a BFR method according to an exemplary embodiment. [Figure 11] 1 is a flowchart of a BFR method according to an exemplary embodiment. [Figure 12] 1 is a flowchart of a BFR method according to an exemplary embodiment. [Figure 13] FIG. 1 is a block diagram of a BFR device according to an exemplary embodiment. [Figure 14] FIG. 2 is a block diagram of an apparatus for BFR according to an exemplary embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0042] Exemplary embodiments will now be described in detail, examples of which are illustrated in the drawings. Where the following description refers to the drawings, the same numerals in different drawings represent the same or similar elements unless otherwise stated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure, as detailed in the appended claims.

[0043] The beam failure recovery method provided by the embodiment of the present disclosure can be applied to the wireless communication system shown in Figure 1. Referring to Figure 1, the wireless communication system includes a terminal and a network device. The terminal is connected to the network device through a wireless resource and transmits and receives data.

[0044] It is understood that the wireless communication system shown in Fig. 1 is only a schematic description, and the wireless communication system may further include other network devices not shown in Fig. 1, such as a core network device, a wireless relay device, and a wireless forwarding device. The embodiment of the present disclosure does not limit the number of network devices and the number of terminals included in the wireless communication system.

[0045] Further, it can be understood that the wireless communication system of the embodiment of the present disclosure is a network that provides wireless communication functions. The wireless communication system can adopt different communication technologies, such as code division multiple access (CDMA), wideband code division multiple access (WCDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency-division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), carrier sense multiple access with collision avoidance, etc. Based on factors such as capacity, speed, and time lag of different networks, the network can be divided into 2G (English: generation) networks, 3G networks, 4G networks, or future evolution networks such as 5G networks, and the 5G network may be referred to as a new radio network (NR). For ease of explanation, this disclosure may refer to a wireless communication network as simply a network.

[0046] Furthermore, the network device according to the present disclosure may also be referred to as a radio access network device. The radio access network device may be a base station, an evolved base station (eNB), a femtocell, an access point (AP), a radio relay node, a radio forwarding node, a transmission point (TP), or a transmission and reception point (TRP) in a wireless fidelity (WIFI) system, or a gNB in ​​an NR system, or may be a component or a part of a device constituting a base station. In the case of a vehicle-to-everything (V2X) communication system, the network device may be an in-vehicle device. It should be understood that the embodiments of the present disclosure are not limited to a specific technology adopted by the network device and a specific device form.

[0047] Furthermore, the terminal according to the present disclosure may also be referred to as a terminal device, user equipment (UE), mobile station (MS), mobile terminal (MT), etc., and is a device for providing voice and / or data connectivity to a user. For example, the terminal may be a handheld device having a wireless connection function, an in-vehicle device, etc. Currently, some examples of terminals include a mobile phone, a pocket personal computer (PPC), a handheld computer, a personal digital assistant (PDA), a notebook computer, a tablet computer, a wearable device, or an in-vehicle device. In addition, in the case of a vehicle-to-everything (V2X) communication system, the terminal device may be an in-vehicle device. It should be understood that the embodiments of the present disclosure are not limited to a specific technology adopted by the terminal and a specific device form.

[0048] In the present disclosure, a network device and a terminal perform data transmission based on a beam. When the network device and the terminal perform data transmission based on a beam, the network device can provide a service to the terminal using a TRP. For example, the network device can transmit a PDCCH to the terminal using a TRP. If the terminal detects that the radio link quality of the reference signal resource for failure detection is less than a threshold, the terminal performs BFR. The reference signal resource for failure detection may be indicated and configured by the base station, and if not indicated and configured by the base station, the reference signal resource for failure detection is a reference signal resource for QCL type D in a Transmission state indication (TCI) state corresponding to a control resource set (CORESET) for transmitting a PDCCH. The terminal performing BFR can also be referred to as the terminal performing Link recovery.

[0049] In the related art, the mechanism by which the terminal performs BFR includes cell specific BFR. The cell specific BFR includes a random access BFR mechanism (Spcell specific BFR) and a BFR mechanism based on PUCCH-SR and / or PUSCH MAC CE (Scell ​​specific BFR). The mechanism by which the terminal performs BFR further includes a TRP level BFR mechanism (TRP specific BFR). The random access based BFR mechanism includes a contention based random access method (CBRA) and a contention free random access method (CFRA). In the Spcell specific BFR, i.e., random access BFR mechanism, the terminal initiates a random access process to request beam recovery. In the Scell ​​specific BFR, i.e., a BFR mechanism based on PUCCH-SR and / or PUSCH MAC CE, the terminal performs beam failure recovery based on the PUCCH-SR and / or PUSCH MAC CE mechanism. When the terminal detects that a beam failure occurs in a secondary cell, the terminal transmits MAC CE information on a PUSCH resource to indicate information related to beam failure recovery, and the PUSCH resource may be obtained by transmitting a scheduling request on a PUCCH-SR dedicated to BFR, or may be another PUSCH resource. In the BFR mechanism based on the TRP level, the BFR based on the Scell ​​specific is multiplexed.

[0050] In the related art, when a terminal performs beam failure detection, it usually detects a reference signal (RS) for TRP beam failure detection. If it is detected that the radio link quality of the corresponding RS is lower than a threshold N times, it is determined that the failure of this RS is detected, and if all the RSs for this TRP failure detection fail, it is determined that a beam failure has occurred in this TRP. In the related art, there is a Multi-TRP PDCCH scenario between a terminal and a network device. In the Multi-TRP PDCCH scenario, a terminal configures a random access BFR mechanism in the same cell and also configures a TRP-level BFR mechanism. Since multiple TRPs correspond to multiple reference signal sets for failure detection, multiple reference signal sets for failure detection are configured in the same cell, where each reference signal set among the multiple reference signal sets for failure detection may be indicated and configured by the base station, and if the base station does not indicate and configure, the terminal may determine based on the reference signal of QCL Type D in the TCI state of CORESET. In the case where beam failures of two or more TRPs occur in multiple TRPs, the relevant technology does not propose whether to trigger a BFR at the trigger cell level to perform a random access BFR.

[0051] An embodiment of the present disclosure provides a BFR method, which triggers a BFR based on random access when a TRP where beam failure occurs is detected in multiple TRPs.

[0052] In the embodiments of the present disclosure, for ease of explanation, one TRP of at least two TRPs among multiple TRPs configured in a terminal in which a beam failure has occurred is referred to as the first TRP, and the other TRP is referred to as the second TRP.

[0053] 2 is a flow chart of a BFR method shown by an exemplary embodiment, as shown in FIG. 2, the BFR method is applied to a terminal, and the terminal configures a random access BFR mechanism and a TRP-level BFR mechanism in the same cell. The BFR method provided by the embodiment of the present disclosure includes the following steps:

[0054] In step S11, in response to multiple TRPs being set in the terminal, beam failure detection is performed for the multiple TRPs.

[0055] In step S12, in response to detecting the presence of a first TRP in which a beam failure has occurred among the multiple TRPs, a random access-based BFR is triggered.

[0056] In the embodiment of the present disclosure, a plurality of TRPs configured in a terminal can be understood as a plurality of reference signal resource sets for beam failure detection being configured, and / or a plurality of control resource pool index values ​​(CORESETPoolIndex values) being configured in the terminal. A plurality of reference signal resource sets for beam failure detection configured in a terminal can be understood as a plurality of reference signal resource sets for failure detection being indicated and configured in the terminal. If a reference signal resource set for failure detection is not indicated and configured in the terminal, the terminal can determine one or more reference signal resource sets for failure detection based on CORESETPoolIndex or CORESETGroup. For example, if all CORESETs of the terminal correspond to the same CORESETPoolIndex or CORESETGroup, the terminal determines a reference signal resource for failure detection based on a reference signal resource of QCL Type D of the TCI state of at least one CORESET among all CORESETs. If all CORESETs of the terminal correspond to different CORESETPoolIndex or CORESETGroup, the terminal determines the reference signal resource for failure detection corresponding to this CORESETPoolIndex or CORESETGroup based on the reference signal resource of QCL Type D of the TCI state of at least one CORESET among all CORESETs corresponding to the same CORESETPoolIndex or CORESETGroup. Each CORESETPoolIndex or CORESETGroup corresponds to one reference signal resource for failure detection.

[0057] In all embodiments of the present disclosure, "multiple TRPs are configured in the terminal" refers to the terminal being configured to perform uplink / downlink transmission with multiple TRPs of the base station. In some embodiments, the terminal can determine multiple TRP configurations based on a communication standard, or the terminal can determine multiple TRP configurations based on configuration parameters or configuration signaling sent from the base station, or the terminal can negotiate with the base station to determine multiple TRPs, which are a subset or true subset of the multiple TRPs of the base station (thus, the base station may be able to make different UEs correspond to different TRP sets, or may make some UEs correspond to the same TRP set but other UEs correspond to different TRP sets). The same content will not be described later.

[0058] In the embodiment of the present disclosure, the terminal may perform beam failure detection of a plurality of TRPs by detecting a reference signal set corresponding to each of the plurality of TRPs when the terminal is used for beam failure detection of some or all of the TRPs. For example, the terminal detects a reference signal set for beam failure detection of the first TRP and / or the second TRP.

[0059] In the embodiment of the present disclosure, the detection of the existence of a TRP where a beam failure has occurred can adopt a method of determining that the existence of a TRP where a beam failure has occurred in a conventional method. For example, for a certain TRP, if it is detected that the radio link quality of the corresponding RS is lower than a threshold value for N times for each RS in a reference signal set for failure detection, it is determined that the beam failure has occurred in this TRP.

[0060] In an embodiment of the present disclosure, when it is detected that a first TRP in which beam failure occurs exists among multiple TRPs, beam failure recovery based on random access can be triggered, thereby realizing timely performance of beam failure recovery based on random access in multiple TRP scenarios, and ensuring the timeliness and effectiveness of beam failure recovery.

[0061] In the BFR method provided by the embodiment of the present disclosure, if the terminal determines that a trigger condition for triggering a random access BFR is met, the terminal can trigger a random access-based BFR.

[0062] FIG. 3 is a flowchart of a BFR method according to an exemplary embodiment. As shown in FIG. 3, the BFR method is applied to a terminal and includes the following steps 21-22.

[0063] In step S21, in response to multiple TRPs being set in the terminal, beam failure detection is performed for the multiple TRPs.

[0064] In step S22, a random access-based BFR is triggered in response to detecting that a first TRP in which a beam failure has occurred exists among a plurality of TRPs and that a trigger condition for triggering the random access BFR is satisfied.

[0065] In an embodiment of the present disclosure, the trigger conditions required to trigger a random access based BFR can be determined in a TRP specific based BFR process after it is detected that a first TRP in which a beam failure has occurred exists among multiple TRPs.

[0066] In the BFR method provided by the embodiment of the present disclosure, when the terminal detects that a first TRP in which a beam failure occurs exists among the plurality of TRPs, the terminal may transmit a scheduling request on a physical uplink control channel (PUCCH) resource within the nearest waiting time. In the embodiment of the present disclosure, for ease of explanation, the time when the terminal detects that a first TRP in which a beam failure occurs exists among the plurality of TRPs is called a first time (t1), and the time when the terminal transmits a scheduling request on a PUCCH-SR resource is called a second time (t2). In one example, the terminal detects respective reference signal sets for detecting beam failure of the first TRP and / or the second TRP. At the first time, for example, when it is detected that a beam failure occurs in the first TRP, the terminal waits for a PUCCH-SR at the latest t2 time. The terminal transmits a scheduling request on a PUCCH-SR resource at time t2.

[0067] Although the first time and t1 in the embodiments of the present disclosure may be used interchangeably, those skilled in the art will understand the consistency of their meanings and will understand that the first time / t1 in each embodiment has the same meaning.

[0068] Furthermore, the second time and t2 in the embodiments of the present disclosure may be used interchangeably, but those skilled in the art will understand the consistency of meaning and understand that the second time / t2 in each embodiment has the same meaning.

[0069] FIG. 4 is a flowchart of a BFR method according to an exemplary embodiment. As shown in FIG. 4, the BFR method is applied to a terminal, and includes the following steps:

[0070] In step S31, in response to multiple TRPs being set in the terminal, beam failure detection is performed for the multiple TRPs.

[0071] In step S32, in response to detecting the presence of a first TRP in which a beam failure has occurred in the plurality of TRPs and detecting, before a second time, the presence of a second TRP in which a beam failure has occurred in the plurality of TRPs, a random access-based BFR is triggered.

[0072] In one embodiment, the embodiment of the present disclosure determines that a trigger condition for triggering random access beam failure recovery is satisfied in response to detecting the presence of a second TRP in which a beam failure occurs in a plurality of TRPs after a first time and before a second time, where the first time is the time when the beam failure is detected in the first TRP, and the second time is the time (t2) when a scheduling request is transmitted on a physical uplink control channel resource.

[0073] Based on the above embodiment, if the terminal detects that a beam failure also occurs in the second TRP before t2, it triggers a BFR based on random access.

[0074] In another embodiment of the present disclosure, the terminal may receive downlink control information (DCI) for scheduling PUSCH after a certain time has elapsed after transmitting a scheduling request on the PUCCH-SR resource at the second time. For ease of explanation, the DCI for scheduling PUSCH is referred to as a first DCI, and the time at which the first DCI is received is referred to as a third time (t3).

[0075] The third time and t3 in the embodiments of the present disclosure may be used interchangeably, but those skilled in the art will understand the consistency of their meanings and that the third time / t3 in each embodiment has the same meaning.

[0076] FIG. 5 is a flowchart of a BFR method according to an exemplary embodiment. As shown in FIG. 5, the BFR method is applied to a terminal and includes the following steps S41 to S42.

[0077] In step S41, in response to multiple TRPs being set in the terminal, beam failure detection is performed for the multiple TRPs.

[0078] In step S42, in response to detecting the presence of a first TRP in which a beam failure has occurred in the plurality of TRPs and detecting, before a third time, the presence of a second TRP in which a beam failure has occurred in the plurality of TRPs, a random access-based BFR is triggered.

[0079] In one embodiment, the embodiment of the present disclosure determines that a trigger condition for triggering random access beam failure recovery is satisfied in response to detecting the presence of a second TRP in which beam failure occurs in the plurality of TRPs at a second time or after the second time and before a third time, where the second time is a time when a scheduling request is transmitted on a physical uplink control channel resource and the third time is a time when first downlink control information for scheduling a physical uplink shared channel is received.

[0080] Based on the above embodiment, if the terminal detects that a beam failure also occurs in the second TRP at time t2, or after t2 and before t3, it triggers a BFR based on random access.

[0081] In another embodiment of an example of the present disclosure, an example of the present disclosure determines that a trigger condition is met to trigger random access beam failure recovery in response to detecting the presence of a second TRP in which a beam failure has occurred at multiple TRPs before a third time.

[0082] Based on the above embodiment, if the terminal detects that a beam failure also occurs in the second TRP at time t1, or after t1 and before t3, it triggers a BFR based on random access.

[0083] FIG. 6 is a flowchart of a BFR method according to an exemplary embodiment. As shown in FIG. 6, the BFR method is applied to a terminal and includes the following steps S51 to S52.

[0084] In step S51, in response to multiple TRPs being set in the terminal, beam failure detection is performed for the multiple TRPs.

[0085] In step S52, a random access-based BFR is triggered in response to detecting that a first TRP in which a beam failure has occurred is present among the plurality of TRPs, detecting that a second TRP in which a beam failure has occurred is present among the plurality of TRPs before a third time, and not receiving any downlink control information within a first time length after the second time.

[0086] In one embodiment of the present disclosure, if any DCI signaling is not received within a certain time length (first time length T1) after the second time, the terminal may determine that a trigger condition for triggering a random access-based BFR is satisfied. From t2 to t2+T1 If the first DCI signaling is not received, the terminal triggers a random access-based BFR. From t2 to t2+T1 If no DCI (hereinafter referred to as the second DCI) is received for the network device to determine that it has received MAC CE information, a random access-based BFR is triggered.

[0087] In another embodiment of the present disclosure, the terminal receives a first DCI for scheduling a PUSCH at a third time, and after a certain time has elapsed, the terminal may transmit MAC CE information related to the TRP in which a beam failure occurs on the PUSCH. Hereinafter, for ease of explanation, the time when the MAC CE information related to the TRP in which a beam failure occurs is transmitted on the PUSCH is referred to as a fourth time (t4).

[0088] Furthermore, the fourth time and t4 in the embodiments of the present disclosure may be used interchangeably, but those skilled in the art will understand the consistency of meaning and that the fourth time / t4 in each embodiment has the same meaning.

[0089] FIG. 7 is a flowchart of a BFR method according to an exemplary embodiment. As shown in FIG. 7, the BFR method is applied to a terminal and includes the following steps S61 to S62.

[0090] In step S61, in response to multiple TRPs being set in the terminal, beam failure detection is performed for the multiple TRPs.

[0091] In step S62, in response to detecting the presence of a first TRP in which a beam failure has occurred in the plurality of TRPs and detecting, before a fourth time, the presence of a second TRP in which a beam failure has occurred in the plurality of TRPs, a random access-based BFR is triggered.

[0092] Here, the fourth time is the time when MAC CE information related to the TRP in which the beam failure occurred is transmitted on the PUSCH.

[0093] In addition, the PUSCH for transmitting MAC CE information related to the TRP in which the beam failure has occurred may be scheduled by the first DCI signaling, or may be a PUSCH of configured grant Type 1 or Type 2. For ease of explanation, in each of the following embodiments, the PUSCH for transmitting MAC CE information related to the TRP in which the beam failure has occurred is called the first PUSCH.

[0094] In one embodiment, in response to detecting the presence of a second TRP in which a beam failure has occurred in a plurality of TRPs at a third time or after the third time and before a fourth time, it is determined that a trigger condition for triggering a random access BFR is met.

[0095] Based on the above embodiment, if the terminal detects that a beam failure also occurs in the second TRP at time t3, or after t3 and before t4, it triggers a random access-based BFR.

[0096] In another embodiment, in response to detecting the presence of a second TRP in which beam failure has occurred in a plurality of TRPs before the fourth time, it is determined that a trigger condition for triggering a random access BFR is satisfied.

[0097] Based on the above embodiment, if the terminal detects that a beam failure also occurs in the second TRP at time t1, or after t1 and before t4, it triggers a BFR based on random access.

[0098] Furthermore, in an embodiment of the present disclosure, if it is detected that a second TRP exists in which a beam failure has occurred in multiple TRPs before the fourth time, it can also be determined that a trigger condition for triggering a random access BFR is met if the beam corresponding to the first PUSCH is the beam in which a beam failure has occurred.

[0099] FIG. 8 is a flowchart of a BFR method according to an exemplary embodiment. As shown in FIG. 8, the BFR method is applied to a terminal and includes the following steps S71 to S72.

[0100] In step S71, in response to multiple TRPs being set in the terminal, beam failure detection is performed for the multiple TRPs.

[0101] In step S72, it is detected that a first TRP in which beam failure has occurred exists among the multiple TRPs, and before a fourth time, it is detected that a second TRP in which beam failure has occurred exists among the multiple TRPs, and in response to the beam corresponding to the first PUSCH being the beam in which beam failure has occurred, a random access-based BFR is triggered.

[0102] In one embodiment, if it is detected that a second TRP exists in which a beam failure has occurred in multiple TRPs at a third time or after the third time and before the fourth time, it may be determined that a trigger condition for triggering a random access BFR is met if the beam corresponding to the first PUSCH is the beam in which a beam failure has occurred.

[0103] In another embodiment, if it is detected that a second TRP exists in which a beam failure has occurred in multiple TRPs before the fourth time, it may be determined that a trigger condition for triggering a random access BFR is met if the beam corresponding to the first PUSCH is the beam in which a beam failure has occurred.

[0104] In an embodiment of the present disclosure, the terminal transmits MAC CE information related to the TRP where the beam failure occurs in the PUSCH at the fourth time, and receives the second DCI signaling after a certain time has elapsed. Hereinafter, the time when the second DCI is received is referred to as the fifth time (t5). The fifth time is the time when the second DCI is received, and the second DCI is used to determine that the network device has already received the MAC CE information.

[0105] Furthermore, the fifth time and t5 in the embodiments of the present disclosure may be used interchangeably, but those skilled in the art will understand the consistency of meaning and understand that the fifth time / t5 in each embodiment has the same meaning.

[0106] FIG. 9 is a flowchart of a BFR method according to an exemplary embodiment. As shown in FIG. 9, the BFR method is applied to a terminal and includes the following steps S81 to S82.

[0107] In step S81, in response to multiple TRPs being set in the terminal, beam failure detection is performed for the multiple TRPs.

[0108] In step S82, in response to detecting the presence of a first TRP in which a beam failure has occurred among the plurality of TRPs and detecting, before a fifth time, the presence of a second TRP in which a beam failure has occurred among the plurality of TRPs, a random access-based BFR is triggered.

[0109] In one embodiment, determining that a trigger condition for triggering a random access BFR is met in response to detecting the presence of a second TRP in which a beam failure occurs in the plurality of TRPs at a fourth time or after the fourth time and before a fifth time, the fourth time being a time when MAC CE information related to the TRP in which the beam failure occurs is transmitted on a PUSCH.

[0110] Based on the above embodiment, if the terminal detects that a beam failure also occurs in the second TRP at time t4, or after t4 and before t5, it triggers a BFR based on random access.

[0111] In one embodiment, determining that a trigger condition for triggering a random access BFR is satisfied in response to detecting the presence of a second TRP in which beam failure occurs in the plurality of TRPs before the fifth time, the fifth time being a time when a second DCI is received, the second DCI being used to determine that the network device has already received the MAC CE information.

[0112] Based on the above embodiment, if the terminal detects that a beam failure also occurs in the second TRP at time t1, or after t1 and before t5, it triggers a BFR based on random access.

[0113] Further, in the embodiment of the present disclosure, if the terminal detects that a beam failure also occurs in the second TRP before the fifth time, and if the second DCI signaling is not received within a certain time length (referred to as the second time length T2) after the fourth time, it determines that a trigger condition for triggering a random access BFR is met. That is, From t4 to t4+T2 , if the second DCI signaling is not received, trigger a random access based BFR.

[0114] In an embodiment of the present disclosure, the second DCI signaling is used to determine that the network device has already received the MAC CE information, and the terminal updates the beam after a certain time has elapsed since receiving the second DCI signaling. In an embodiment of the present disclosure, the second DCI can also schedule a PUSCH. Hereinafter, for ease of explanation, a PUSCH scheduled by the second DCI is referred to as a second PUSCH. The Hybrid Automatic Repeat reQuest (HARQ) Identifier (ID) of the second PUSCH and the HARQ ID of the first PUSCH are the same, but the new data indicator (NDI) changes (toggles). The first PUSCH is scheduled by the first DCI or is a PUSCH of configure grant Type 1 or Type 2.

[0115] Updating the beam includes updating at least one of a quasi co-location (QCL) Type-D parameter, an uplink transmit spatial filter (UL TX spatial filter), spatial relation info, a transmission configuration indication state (TCI state), a downlink TCI state (DL TCI state), and an uplink TCI state (UL TCI state).

[0116] FIG. 10 is a flowchart of a BFR method according to an exemplary embodiment. As shown in FIG. 10, the BFR method is applied to a terminal and includes the following steps S91 to S92.

[0117] In step S91, in response to multiple TRPs being set in the terminal, beam failure detection is performed for the multiple TRPs.

[0118] In step S92, a random access-based BFR is triggered in response to detecting that a first TRP in which a beam failure has occurred in a plurality of TRPs exists, detecting that a second TRP in which a beam failure has occurred in a plurality of TRPs exists before a fifth time, and not receiving any DCI within a second time length after the fourth time.

[0119] In one embodiment, at a fourth time or after the fourth time and before the fifth time, a second TRP is detected to exist in which a beam failure has occurred in multiple TRPs, and no DCI is received within a second time length after the fourth time.

[0120] Based on the above embodiment, the terminal detects that a beam failure also occurs in the second TRP at time t4, or after t4 and before t5, and the terminal From t4 to t4+T2 , if the second DCI signaling is not received, trigger a random access based BFR.

[0121] In another embodiment, the presence of a second TRP in which beam failure has occurred in multiple TRPs is detected before the fifth time, and no DCI is received within a second time length after the fourth time.

[0122] Based on the above embodiment, the terminal detects that a beam failure also occurs in the second TRP at time t1 or after t1 and before t5, and the terminal From t4 to t4+T2 , if the second DCI signaling is not received, trigger a random access based BFR.

[0123] In an embodiment of the present disclosure, after the terminal receives the second DCI at the fifth time, after a certain time has elapsed, the terminal can update the beam of the TRP in which the beam failure occurs, i.e., update the beam of the first TRP. In the embodiment of the present disclosure, the time when the beam of the first TRP is updated is called the sixth time.

[0124] Furthermore, the sixth time and t6 in the embodiments of the present disclosure may be used interchangeably, but those skilled in the art will understand the consistency of meaning and that the sixth time / t6 in each embodiment has the same meaning.

[0125] In one embodiment, the method determines that a trigger condition for triggering a random access BFR is met in response to detecting the presence of a second TRP in which beam failure has occurred in the plurality of TRPs before the sixth time, the fifth time being a time when a second DCI is received, the second DCI being used to determine that the network device has already received the MAC CE information, and the sixth time being a time when the beam of the first TRP is updated.

[0126] FIG. 11 is a flowchart of a BFR method according to an exemplary embodiment. As shown in FIG. 11, the BFR method is applied to a terminal and includes the following steps S101 to S102.

[0127] In step S101, in response to multiple TRPs being set in the terminal, beam failure detection is performed for the multiple TRPs.

[0128] In step S102, in response to detecting the presence of a first TRP in which a beam failure has occurred in the plurality of TRPs and detecting, before a sixth time, the presence of a second TRP in which a beam failure has occurred in the plurality of TRPs, a random access-based BFR is triggered.

[0129] In one embodiment, determining that a trigger condition for triggering a random access BFR is met in response to detecting the presence of a second TRP in which beam failure has occurred in the plurality of TRPs at a fifth time or after the fifth time and before a sixth time, the fifth time being a time when a second DCI is received, the second DCI being used to determine that the network device has already received the MAC CE information, and the sixth time being a time when the beam of the first TRP is updated.

[0130] Based on the above embodiment, if the terminal detects that a beam failure also occurs in the second TRP at time t5, or after t5 and before t6, it triggers a BFR based on random access.

[0131] In another embodiment, in response to detecting the presence of a second TRP in which beam failure has occurred in a plurality of TRPs before the sixth time, it is determined that a trigger condition for triggering a random access BFR is met.

[0132] Based on the above embodiment, if the terminal detects that a beam failure also occurs in the second TRP at time t1, or after t1 and before t6, it triggers a BFR based on random access.

[0133] In an embodiment of the present disclosure, the presence of a TRP having a beam failure in the plurality of TRPs can be continuously detected, and after a sixth time, a TRP-level BFR is triggered in response to again detecting the presence of a second TRP having a beam failure in the plurality of TRPs.

[0134] FIG. 12 is a flowchart of a BFR method according to an exemplary embodiment. As shown in FIG. 12, the BFR method is applied to a terminal and includes the following steps S111 to S113.

[0135] In step S111, in response to multiple TRPs being set in the terminal, beam failure detection is performed for the multiple TRPs.

[0136] In step S112, in response to detecting the presence of a first TRP in which a beam failure has occurred in the plurality of TRPs and detecting, before a sixth time, the presence of a second TRP in which a beam failure has occurred in the plurality of TRPs, a random access-based BFR is triggered.

[0137] In step S113, after the sixth time period, a TRP-level BFR is triggered in response to again detecting the presence of a second TRP in which beam failure has occurred in the plurality of TRPs.

[0138] In the embodiment of the present disclosure, triggering a BFR at a TRP level can be understood as triggering a BFR based on a PUCCH-SR and / or a PUSCH MAC CE.

[0139] In the present disclosure, an example is described in which two TRPs are set in a terminal, for example, a first TRP and a second TRP are set. BFR based on the TRP level can be understood as an execution process as follows.

[0140] a) The terminal detects the respective reference signal sets for beam failure detection of the first TRP and / or the second TRP, and if it is detected that a beam failure has occurred in the first TRP at time t1, the terminal waits for a PUCCH-SR at the latest time t2, where it is assumed that no other PUCCH-SR has been transmitted until time t1, or if no PUCCH-SR is transmitted at time t2, there is no available PUSCH resource at the next latest time period.

[0141] In an embodiment of the present disclosure, the detection of a beam failure occurring at a particular TRP can be understood as multiplexing a conventionally defined method, i.e., for each RS in a reference signal set, the radiolinkquality of the corresponding RS is detected N times to be lower than a particular threshold.

[0142] b) The terminal waits for a first DCI signaling for scheduling a first PUSCH at time t3.

[0143] c) The terminal receives a first DCI for scheduling a first PUSCH at time t3, and transmits MAC CE information related to the TRP in which beam failure occurred in the PUSCH at time t4.

[0144] d) The terminal transmits MAC CE information related to the TRP in which the beam failure occurred on the first PUSCH at time t4, and waits for a second DCI signaling at time t5, which is used to determine that the base station has received the MAC CE information, and the terminal updates the beam a time T0 after receiving the second DCI signaling.

[0145] The second DCI signaling may be used to schedule a second PUSCH, and the HARQ ID of the second PUSCH is the same as the HARQ ID of the first PUSCH, but the NDI field value toggles. It can be understood that the first PUSCH is scheduled by the first DCI, or is a PUSCH of configure grant Type 1 or Type 2.

[0146] Further, updating the beam includes updating at least one of a quasi co-location QCL Type-D parameter, a UL TX spatial filter, a spatial relation info, a TCI state, a DL TCI state, and a UL TCI state.

[0147] e) The terminal receives the second DCI signaling at time t5. It waits until time t6 to update the beam of the TRP where the beam failure occurred.

[0148] Furthermore, in the embodiment of the present disclosure, when the BFR that performs random access is triggered, the BFR of TRP level may be triggered, or the BFR of TRP level may not be triggered. That is, when the BFR based on random access is triggered, whether or not the BFR of TRP specific is triggered does not affect the BFR based on random access.

[0149] Based on the above embodiments, the triggering conditions for triggering a random access-based BFR provided in the embodiments of the present disclosure may include at least one of the following cases to trigger a random access-based BFR:

[0150] a) If the terminal detects that a beam failure has occurred in the second TRP before t2, it triggers a random access-based BFR.

[0151] b) If the terminal detects that a beam failure has also occurred in the second TRP before t3, it triggers a random access-based BFR.

[0152] c) The terminal detects that a beam failure has also occurred at a second TRP at time t2 or after t2 and before t3, and the terminal From t2 to t2+T1 , if the first DCI signaling is not received, trigger a random access based BFR.

[0153] d) If the terminal detects that a beam failure has also occurred in the second TRP before t4, it triggers a random access-based BFR.

[0154] e) If the terminal detects that a beam failure has also occurred in the second TRP at time t3, or after t3 and before t4, and the beam of the first PUSCH is the failed beam, it triggers a BFR based on random access.

[0155] f) If the terminal detects that a beam failure has also occurred in the second TRP before t5, it triggers a random access-based BFR.

[0156] g) The terminal detects that a beam failure has also occurred at the second TRP at time t4, or after t4 and before t5, and the terminal From t4 to t4+T2 , if the second DCI signaling is not received, trigger a random access based BFR.

[0157] h) If the terminal detects that a beam failure has also occurred in the second TRP before t6, it triggers a random access-based BFR.

[0158] I) The terminal triggers only the TRP-specific BFR if it again detects that a beam failure has occurred on the second TRP after t6.

[0159] In the BFR method provided by an embodiment of the present disclosure, in a Multi-TRP PDCCH scenario, depending on the terminal in which both a TRP specific BFR and a cell specific BFR are configured in the same cell, the conditions for triggering the cell specific BFR are determined to ensure the timeliness and effectiveness of beam failure recovery.

[0160] In addition, it is understood by those skilled in the art that each type of embodiment / example of the embodiment of the present disclosure may be used in conjunction with the above-mentioned embodiment or may be used independently. Whether used independently or in conjunction with the above-mentioned embodiment, the realization principle is the same. In the embodiment of the present disclosure, some embodiments are described in the embodiment used together. Of course, it is understood by those skilled in the art that such an exemplary description does not limit the embodiment of the present disclosure.

[0161] Based on the same idea, an embodiment of the present disclosure further provides a BFR device.

[0162] It can be understood that the BFR device provided by the embodiments of the present disclosure includes corresponding hardware configurations and / or software modules for performing each function to realize the above functions. By combining the units and algorithm steps of each disclosed example of the embodiments of the present disclosure, the embodiments of the present disclosure can be realized in the form of hardware or a combination of hardware and computer software. Whether a specific function is executed by hardware or in a manner in which computer software drives hardware depends on the specific application and design agreement of the technical solution. In order to realize the described functions, a person skilled in the art can realize them in different ways for a specific application, but such realization should not be considered to go beyond the scope of the technical solution of the embodiments of the present disclosure.

[0163] 13 is a block diagram of a BFR device according to an exemplary embodiment. Referring to FIG. 13, a BFR device 100 includes a detecting unit 101 and a processing unit 102.

[0164] The detecting unit 101 is configured to perform beam failure detection for the multiple TRPs when multiple TRPs are configured in the terminal, and the processing unit 102 is configured to trigger a random access-based BFR when the detecting unit 101 detects that a first TRP exists in which a beam failure has occurred among the multiple TRPs.

[0165] In one embodiment, the processing unit 102 is further configured to determine that a trigger condition for triggering a random access BFR is met before triggering the random access based BFR.

[0166] In one embodiment, in response to the detecting unit 101 detecting the existence of a second TRP in which a beam failure has occurred in multiple TRPs before the second time, the processing unit 102 determines that a trigger condition for triggering a random access BFR is met, the first time being the time at which it is detected that a beam failure has occurred in the first TRP, and the second time being the time at which a scheduling request is transmitted on the PUCCH resource.

[0167] In one embodiment, in response to detecting by the detecting unit 101 that a second TRP exists in which beam failure has occurred in multiple TRPs before a third time, the processing unit 102 determines that a trigger condition for triggering a random access BFR is met, and the third time is a time when a first DCI for scheduling a PUSCH is received.

[0168] In one embodiment, in response to not receiving any DCI within a first length of time after a second time, the processing unit 102 determines that a trigger condition for triggering a random access BFR is met, where the second time is the time when a scheduling request is transmitted on the PUCCH resource.

[0169] In one embodiment, in response to the detecting unit 101 detecting the presence of a second TRP in which a beam failure has occurred in the plurality of TRPs before the fourth time, the processing unit 102 determines that a trigger condition for triggering a random access BFR is met, and the fourth time is the time when MAC CE information related to the TRP in which the beam failure has occurred is transmitted on the first PUSCH.

[0170] In one embodiment, in response to the beam corresponding to the first PUSCH being the beam in which the beam failure occurred, the processing unit 102 determines that a trigger condition for triggering a random access BFR is met.

[0171] In one embodiment, in response to the detecting unit 101 detecting the presence of a second TRP in which beam failure has occurred in multiple TRPs before the fifth time, the processing unit 102 determines that a trigger condition for triggering a random access BFR is met, the fifth time being the time when a second DCI is received, and the second DCI is used to determine that the network device has already received MAC CE information.

[0172] In one embodiment, the second DCI is used to schedule a second PUSCH.

[0173] Here, a hybrid automatic repeat request identifier of a second PUSCH scheduled by a second DCI is the same as a hybrid automatic repeat request identifier of a first PUSCH, the first PUSCH is scheduled by a first DCI or is a PUSCH of configure grant Type 1 or Type 2, and / or a new data indication of a second PUSCH scheduled by a second DCI changes.

[0174] In one embodiment, in response to not receiving any DCI within a second time length after the fourth time, the processing unit 102 determines that a trigger condition is met to trigger a random access BFR, the fourth time being the time when media access control control element (MAC CE) information associated with the TRP in which the beam failure occurred is transmitted on the first PUSCH.

[0175] In one embodiment, in response to the detecting unit 101 detecting the presence of a second TRP in which beam failure has occurred in multiple TRPs before a sixth time, it is determined that a trigger condition for triggering a random access BFR is met, and the sixth time is the time when the beam of the first TRP is updated.

[0176] In one embodiment, after the sixth time, in response to the detecting unit 101 again detecting the presence of a second TRP in which beam failure has occurred at multiple TRPs, the processing unit 102 triggers a TRP-level BFR.

[0177] In one embodiment, triggering a TRP-level BFR includes triggering a BFR based on a PUCCH-SR and / or a PUSCH MAC CE.

[0178] In one embodiment, the processing unit 102 further Used to trigger a P-level BFR or not trigger a TRP-level BFR.

[0179] In one embodiment, multiple TRPs configured in a terminal include multiple reference signal resource sets for beam failure detection configured in the terminal and / or multiple control resource pool index values ​​configured in the terminal.

[0180] The specific manner in which each module of the apparatus in the above embodiment performs operations has already been described in detail in the embodiment relating to the method, so it will not be described in detail here.

[0181] 14 is a block diagram of a device 200 for BFR according to an exemplary embodiment. For example, the device 200 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.

[0182] Referring to FIG. 14, the device 200 may include one or more components: a processing component 202, a memory 204, a power component 206, a multimedia component 208, an audio component 210, an input / output (I / O) interface 212, a sensor component 214, and a communication component 216.

[0183] The processing component 202 typically controls the overall operation of the device 200, such as operations related to display, phone calls, data communication, camera operation, and recording operations. The processing component 202 may include one or more processors 220 for executing instructions to complete all or some of the steps of the above methods. The processing component 202 may also include one or more modules to facilitate interaction with other components. For example, the processing component 202 may include a multimedia module to facilitate interaction between the multimedia component 208 and the processing component 202.

[0184] Memory 204 is configured to store various types of data to support operation on device 200. Examples of these data include instructions for any application programs or methods for operating on device 200, contact data, phone book data, messages, images, videos, etc. Memory 204 may be implemented by any type of volatile or non-volatile storage device or combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk, or optical disk.

[0185] The power component 206 provides power to various components of the device 200. The power component 206 can include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power to the device 200.

[0186] The multimedia component 208 includes a screen that provides an output interface between the device 200 and a user. In some embodiments, the screen can include a liquid crystal display (LCD) and a touch panel (TP). When the screen includes a touch panel, the screen can be implemented as a touch screen to receive input signals from a user. The touch panel includes one or more touch sensors to sense touch, slide, and touch panel gestures. The touch sensors can detect the boundaries of a touch or slide operation as well as the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 208 includes a front camera and / or a back camera. When the device 200 is in an operation mode, such as a photo mode or a video mode, the front camera and / or the back camera can receive external multimedia data. Each front camera and back camera may be a fixed optical lens system or may have a focal length and optical zoom capability.

[0187] The audio component 210 is configured to output and / or input audio signals. For example, the audio component 210 includes a microphone (MIC) configured to receive external audio signals when the device 200 is in an operation mode such as a call mode, a record mode, and a voice recognition mode. The received audio signals may be further stored in the memory 204 or transmitted via the communication component 216. In some embodiments, the audio component 210 further includes a speaker for outputting audio signals.

[0188] The I / O interface 212 provides an interface between the processing component 202 and a peripheral interface module, which may be a keyboard, a click wheel, buttons, etc. These buttons may include, but are not limited to, a home button, volume buttons, a start button, and a lock button.

[0189] The sensor component 214 includes one or more sensors to provide various aspects of status assessment for the device 200. For example, the sensor component 214 can detect the on / off state of the device 200, the relative positioning of a component, such as the display and keypad of the device 200, and can further detect a change in position of the device 200 or one of its components, the presence or absence of contact between a user and the device 200, the orientation or acceleration / deceleration of the device 200, and a temperature change of the device 200. The sensor component 214 can also include a proximity sensor configured to detect the presence of a nearby object in the absence of any physical contact. The sensor component 214 can further include an optical sensor, such as a CMOS or CCD image sensor used for imaging applications. In some embodiments, the sensor component 214 can further include an acceleration sensor, a gyro sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0190] The communication component 216 is configured to facilitate wired or wireless communication between the device 200 and other devices. The device 200 can access a wireless network based on a communication standard, such as WiFi, 2G, or 3G, or a combination thereof. In an exemplary embodiment, the communication component 216 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 216 further includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0191] In an exemplary embodiment, the apparatus 200 may be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the above-described methods.

[0192] In an exemplary embodiment, a non-transitory computer readable storage medium containing instructions, such as a memory 204 containing instructions, may be provided, which may be executed by the processor 220 of the apparatus 200 to complete the method. For example, the non-transitory computer readable storage medium may be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device.

[0193] Furthermore, it can be understood that "plurality" in this disclosure means two or more, and other counter words are similar. "And / or" describes the relation between related objects and indicates that three relations can exist. For example, a description of A and / or B can indicate three situations: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " usually indicates that the related objects before and after are in an "or" relation. The singular forms "a," "the," and "the" are also intended to include the plural, unless the context clearly indicates otherwise.

[0194] Further, it can be understood that while terms such as "first," "second," and the like, describe various pieces of information, these pieces of information should not be limited to these terms. These terms are merely used to distinguish between similar types of information and do not imply any particular order or importance. In fact, terms such as "first," "second," and the like can be used completely interchangeably. For example, a first piece of information can be referred to as a second piece of information, and similarly, a second piece of information can be referred to as a first piece of information, without departing from the scope of this disclosure.

[0195] Additionally, although the embodiments of the present disclosure describe operations in a particular order in the figures, it will be understood that these operations may be performed in the particular order shown, or in a serial order, or that all operations may be performed in order to achieve a desired result. In certain environments, multitasking and parallel processing may be advantageous.

[0196] Those skilled in the art may easily conceive other implementations of the present disclosure after studying the specification and practicing the invention disclosed in the specification. This application is intended to cover any modifications, uses or variations of the present disclosure, which modifications, uses or variations follow the general principles of the present disclosure and include common knowledge or commonly used technical means in the art that are not disclosed in the present disclosure. The specification and examples are considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the following claims.

[0197] It should be noted that the present disclosure is not limited to the exact structure described above and illustrated in the drawings, and various modifications and variations can be made without departing from the scope of the present disclosure, which is limited only by the scope of the appended claims.

Claims

1. 1. A beam failure recovery method, applied to a terminal, the method comprising: In response to a plurality of transmission / reception points (TRPs) being set in the terminal, performing beam failure detection for the plurality of TRPs; In response to detecting the presence of a first TRP in which a beam failure has occurred among the plurality of TRPs, triggering a beam failure recovery based on random access; Prior to the step of triggering random access based beam failure recovery, the method further comprises: determining that a trigger condition is met that triggers random access beam failure recovery; determining that a trigger condition for triggering the random access beam failure recovery is satisfied, determining that a trigger condition for triggering random access beam failure recovery is satisfied in response to detecting the presence of a second TRP in which a beam failure occurs in the plurality of TRPs before a fifth time, the fifth time being a time when second downlink control information is received, the second downlink control information being used to determine that the network device has already received MAC CE information, and the second downlink control information being used to schedule a second physical uplink shared channel; A hybrid automatic repeat request identifier of the second physical uplink shared channel scheduled by the second downlink control information is the same as a hybrid automatic repeat request identifier of the first physical uplink shared channel, and the first physical uplink shared channel is used to transmit media access control control element (MAC CE) information related to the TRP in which beam failure occurs, and / or a new data indication of the second physical uplink shared channel scheduled by the second downlink control information is changed. A beam failure recovery method comprising:

2. The step of determining that a trigger condition for triggering random access beam failure recovery is satisfied includes: determining that a trigger condition for triggering random access beam failure recovery is satisfied in response to detecting the presence of the second TRP in which a beam failure has occurred among the plurality of TRPs after the first time and before the second time; The first time is a time when it is detected that a beam failure occurs in the first TRP, and the second time is a time when a scheduling request is transmitted on a physical uplink control channel resource.

2. The beam failure recovery method of claim 1.

3. The step of determining that a trigger condition for triggering random access beam failure recovery is satisfied includes: determining that a trigger condition for triggering random access beam failure recovery is satisfied in response to detecting the presence of the second TRP in which a beam failure has occurred among the plurality of TRPs before a third time; the third time is a time when first downlink control information for scheduling a physical uplink shared channel is received; 2. The beam failure recovery method of claim 1.

4. The step of determining that a trigger condition for triggering random access beam failure recovery is satisfied includes: determining that a trigger condition is met for triggering random access beam failure recovery in response to any downlink control information not being received within a first length of time after a second time, the second time being a time when a scheduling request is transmitted on a physical uplink control channel resource; 4. The beam failure recovery method of claim 3.

5. The step of determining that a trigger condition for triggering random access beam failure recovery is satisfied includes: determining that a trigger condition for triggering random access beam failure recovery is satisfied in response to detecting the presence of the second TRP in which a beam failure has occurred among the plurality of TRPs before a fourth time; The fourth time is a time when media access control control element (MAC CE) information related to the first TRP in which the beam failure occurred is transmitted on a first physical uplink shared channel.

2. The beam failure recovery method of claim 1.

6. The step of determining that a trigger condition for triggering random access beam failure recovery is satisfied includes: determining that a trigger condition for triggering a random access beam failure recovery is satisfied in response to a beam corresponding to the first physical uplink shared channel being a beam in which a beam failure has occurred; The first physical uplink shared channel is scheduled by the first downlink control information or is a Type 1 or Type 2 physical uplink shared channel of a configured grant.

6. The beam failure recovery method of claim 5.

7. The step of determining that a trigger condition for triggering random access beam failure recovery is satisfied includes: The method further includes determining that a trigger condition for triggering a random access beam failure recovery is satisfied in response to any downlink control information not being received within a second time length after a fourth time, the fourth time being a time when media access control element (MAC CE) information associated with the TRP in which the beam failure occurred is transmitted on the first physical uplink shared channel.

2. The beam failure recovery method of claim 1.

8. The step of determining that a trigger condition for triggering random access beam failure recovery is satisfied includes: determining that a trigger condition for triggering random access beam failure recovery is satisfied in response to detecting the presence of the second TRP in which a beam failure has occurred among the plurality of TRPs before a sixth time; The sixth time is a time when the beam of the first TRP is updated.

2. The beam failure recovery method of claim 1.

9. The method comprises: Further comprising the step of triggering a TRP-level beam failure recovery in response to detecting again the presence of the second TRP in which a beam failure has occurred in the plurality of TRPs after the sixth time period; 9. The beam failure recovery method of claim 8.

10. Triggering the beam failure recovery of the TRP level includes: Triggering beam failure recovery based on at least one of a physical uplink control channel scheduling request (PUCCH-SR) and a physical uplink shared channel medium access control control element (PUSCH MAC CE).

10. The beam failure recovery method of claim 9.

11. The method comprises: Triggering a beam failure recovery at the TRP level or not triggering a beam failure recovery at the TRP level; 2. The beam failure recovery method of claim 1.

12. The fact that multiple TRPs are set in the terminal At least one of: a plurality of reference signal resource sets for beam failure detection are configured in the terminal; and a plurality of control resource pool index values ​​are configured in the terminal; 2. The beam failure recovery method of claim 1.

13. 1. A beam failure recovery apparatus comprising: A detecting unit configured to perform beam failure detection for multiple TRPs when multiple TRPs are configured in a terminal; A processing unit configured to trigger a beam failure recovery based on random access when the detecting unit detects that a first TRP in which a beam failure occurs exists among the plurality of TRPs; The processing unit further comprises: configured to determine that a trigger condition for triggering the random access beam failure recovery is satisfied prior to triggering the random access based beam failure recovery; Determining that a trigger condition is met to trigger a random access beam failure recovery includes: determining that a trigger condition for triggering a random access beam failure recovery is satisfied in response to detecting the presence of a second TRP in which a beam failure occurs in the plurality of TRPs before a fifth time, the fifth time being a time when second downlink control information is received, the second downlink control information being used to determine that a network device has already received MAC CE information, and the second downlink control information being used to schedule a second physical uplink shared channel; A hybrid automatic repeat request identifier of the second physical uplink shared channel scheduled by the second downlink control information is the same as a hybrid automatic repeat request identifier of the first physical uplink shared channel, and the first physical uplink shared channel is used to transmit media access control control element (MAC CE) information related to the TRP in which beam failure occurs, and / or a new data indication of the second physical uplink shared channel scheduled by the second downlink control information is changed. A beam failure recovery device comprising:

14. 1. A beam failure recovery apparatus comprising: A processor; a memory for storing instructions executable by a processor; The processor is configured to perform a beam failure recovery method according to any one of claims 1 to 12. A beam failure recovery device comprising:

15. A storage medium having instructions stored thereon, The instructions in the storage medium, when executed by a processor of a terminal, enable the terminal to perform a beam failure recovery method according to any one of claims 1 to 12. A storage medium comprising:

Images