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US-12628230-B2 - Beam failure recovery method and apparatus, terminal, and storage medium

US12628230B2US 12628230 B2US12628230 B2US 12628230B2US-12628230-B2

Abstract

A beam failure recovery method and apparatus, a terminal, and a storage medium, are provided. The method includes: triggering a beam failure event in a first condition; and sending a Beam Failure Recovery reQuest (BFRQ) in a case that the beam failure event occurs, where the first condition and/or the BFRQ are/is related to M Beam Failure Detection Reference Signal BFD RS groups, and M is a positive integer greater than 1.

Inventors

  • Yang Song
  • Yu Yang
  • Yitao Mo
  • Peng Sun

Assignees

  • VIVO MOBILE COMMUNICATION CO., LTD.

Dates

Publication Date
20260512
Application Date
20230421
Priority Date
20201023

Claims (18)

  1. 1 . A beam failure recovery method, performed by a terminal, wherein the method comprises: triggering a beam failure event when a beam failure occurs on all Beam Failure Detection Reference Signals (BFD RSs) in each BFD RS group in M BFD RS groups; and sending a Beam Failure Recovery reQuest (BFRQ) when the beam failure event occurs, wherein: the BFRQ is related to the M BFD RS groups, and M is a positive integer greater than 1; the BFRQ comprises a group identification number identifying a BFD RS group in which the beam failure event occurs; where the triggering a beam failure event when a beam failure occurs on all Beam Failure Detection Reference Signals (BFD RSs) in each BFD RS group in M BFD RS groups comprises: when a beam failure occurs, reporting a Beam Failure Instance (BFI) to a higher layer; and increasing a beam failure counter corresponding to one of the M BFD RS groups in which a beam failure occurs by 1, wherein when a timer corresponding to the BFD RS group in which a beam failure occurs expires, the beam failure counter corresponding to the BFD RS group in which a beam failure occurs is restarted; and the sending a Beam Failure Recovery reQuest (BFRQ) when the beam failure event occurs comprises: sending the BFRQ when there is a beam failure counter whose value is greater than or equal to a second preset threshold in M beam failure counters configured for the terminal, wherein the M beam failure counters respectively correspond to the M BFD RS groups, and the second preset threshold of the beam failure counter corresponding to each BFD RS group is separately configured.
  2. 2 . The method according to claim 1 , wherein the M BFD RS groups are obtained by classifying a plurality of BFD RSs corresponding to the terminal, and that a beam failure occurs on an BFD RS means that a quality detection result of the BFD RS is worse than a corresponding first preset threshold.
  3. 3 . The method according to claim 1 , wherein each BFD RS group corresponds to one or more of the following configurations: a first Physical Uplink Control CHannel (PUCCH), a Random Access CHannel (RACH) resource, or a candidate beam set.
  4. 4 . The method according to claim 1 , wherein the BFRQ comprises information about one or more new beams, and the one or more new beams comprise: when the terminal is configured with one candidate beam set, one or more new beams selected from the one candidate beam set; when the terminal is configured with M candidate beam sets respectively corresponding to the M BFD RS groups, one or more new beams selected from a candidate beam set corresponding to the BFD RS group in which the beam failure event occurs; or when the terminal is configured with K candidate beam sets, one or more new beams selected from any candidate beam set or one or more candidate beams selected from a target candidate beam set, wherein K is greater than M, and the K candidate beam sets comprise M candidate beam sets respectively corresponding to the M BFD RS groups, wherein the target candidate beam set is a candidate beam set corresponding to a BFD RS group except a BFD RS group in which no beam failure occurs in the K candidate beam sets.
  5. 5 . The method according to claim 4 , wherein when the beam failure occurs in the M BFD RS groups, a maximum of M new beams are selected or a maximum of one new beam is selected; or wherein when the terminal is configured with K candidate beam sets, when a plurality of new beams are selected, the selected new beams belong to different candidate beam sets.
  6. 6 . The method according to claim 1 , wherein the BFI comprises an identifier of a BFD RS group in which a beam failure occurs; and a timer corresponding to each BFD RS group is separately configured.
  7. 7 . The method according to claim 1 , wherein a part of BFD RSs in the M BFD RS groups do not have a same spatial relation with a DeModulation Reference Signal (DMRS) corresponding to a COntrol REsource SET (CORESET); or BFD RSs in a part of BFD RS groups in the M BFD RS groups do not have a same spatial relation with a DMRS corresponding to a CORESET.
  8. 8 . The method according to claim 1 , wherein the sending a BFRQ comprises: sending, by using the most recently scheduled uplink data channel, a Media Access Control Control Element (MAC CE) that carries the BFRQ; or sending a Scheduling Request (SR), and sending, on an uplink data channel, a MAC CE that carries the BFRQ, wherein the uplink data channel is an uplink data channel obtained by means of scheduling by using the SR request.
  9. 9 . The method according to claim 8 , wherein the sending an SR comprises: sending the SR by using a first Physical Uplink Control CHannel (PUCCH), wherein the first PUCCH corresponds to the BFD RS group in which the beam failure event occurs.
  10. 10 . The method according to claim 8 , wherein the terminal sends the BFRQ by using the MAC CE in a Multi-Transmission Reception Point (MTRP) configuration; or when the terminal obtains a configuration indication of sending the BFRQ using the MAC CE, the terminal sends the BFRQ by using the MAC CE.
  11. 11 . The method according to claim 1 , wherein the BFRQ further comprises: information about a Transmission Reception Point (TRP) corresponding to the BFD RS group in which the beam failure event occurs.
  12. 12 . The method according to claim 1 , wherein the sending a BFRQ comprises: reporting the BFRQ by using a Random Access CHannel (RACH).
  13. 13 . The method according to claim 12 , wherein the sending the BFRQ by using a RACH comprises: when the terminal finds a new beam, reporting the BFRQ by using a RACH of Contention Free Random Access (CFRA); or reporting the BFRQ by using a RACH of Contention Based Random Access (CBRA).
  14. 14 . The method according to claim 13 , wherein a RACH resource of the RACH corresponds to at least one of the following: a new beam, or the BFD RS group in which the beam failure event occurs.
  15. 15 . The method according to claim 1 , further comprising: after the BFRQ is sent, determining that a Beam Failure Recovery Response (BFRR) is received in any one of the following conditions: a preset Physical Uplink Shared CHannel (PUSCH) scheduled by a Physical Downlink Control CHannel (PDCCH) is received; a preset PDCCH is received; target Media Access Control Control Element (MAC CE) activation signaling is received, wherein the target MAC CE activation signaling is used to activate a Transmission Configuration Indication (TCI) state of a CORESET, and the TCI state corresponds to a new beam; or target higher layer signaling is received, wherein the target higher layer signaling comprises setting a TCI state of a COntrol REsource SET (CORESET), and the TCI state corresponds to a new beam.
  16. 16 . The method according to claim 1 , wherein when the terminal is in a Multi-Transmission Reception Point (MTRP) state of Multi-Downlink Control Information (M-DCI), the method further comprises: after the BFRQ is sent, and a preset Physical Uplink Shared CHannel (PUSCH) scheduled by a Physical Downlink Control CHannel (PDCCH) is received or a preset PDCCH is received, and before Media Access Control Control Element (MAC CE) activation signaling of a Transmission Configuration Indication (TCI) state is received, assuming that an antenna port of a Control REsource SET (CORESET) associated with a CORESET Pool Index (CORESETPoolIndex) corresponding to the BFD RS group in which the beam failure event occurs has a Quasi Co-Location (QCL) relationship with a new beam, and assuming that an antenna port for receiving a PDSCH has a QCL relationship with the new beam; after the BFRQ is sent, and target MAC CE activation signaling is received, and before MAC CE activation signaling of a TCI state is received, determining, according to the target MAC CE activation signaling indication, a TCI state of a CORESET associated with a CORESETPoolIndex corresponding to the BFD RS group in which the beam failure event occurs, wherein the target MAC CE activation signaling is used to activate the TCI state of the CORESET, and the TCI state corresponds to a new beam; after the BFRQ is sent, and target higher layer signaling is received, and before MAC CE activation signaling of a TCI state is received, determining, according to a parameter configuration of the target higher layer signaling, a TCI state of a CORESET associated with a CORESETPoolIndex corresponding to the BFD RS group in which the beam failure event occurs, wherein the target higher layer signaling comprises setting the TCI state of the CORESET, and the TCI state corresponds to a new beam; after the BFRQ is sent to report a new beam, and a preset PDCCH is received, and before MAC CE activation signaling of a TCI state is received, reserving, by the terminal, only a part of CORESETs, and assuming that an antenna port of the part of CORESETs has a QCL relationship with the new beam; or after the BFRQ is sent, and before MAC CE activation signaling of a TCI state is received, assuming that an antenna port of a CORESET associated with a CORESETPoolIndex corresponding to the BFD RS group in which the beam failure event occurs has a QCL relationship with a new beam, and assuming that an antenna port for receiving a PDSCH has a QCL relationship with the new beam; wherein when the terminal is in an MTRP state of Single Downlink Control Information (S-DCI), the method further comprises: after the BFRQ is sent, and a preset PUSCH scheduled by a PDCCH is received or a preset PDCCH is received, and before MAC CE activation signaling of a TCI state is received, assuming that an antenna port or a Control REsource SET-Beam Failure Recovery (CORESET-BFR) of a CORESET corresponding to the BFD RS group in which the beam failure event occurs has a QCL relationship with a new beam; after the BFRQ is sent, and target MAC CE activation signaling is received, and before MAC CE activation signaling of a TCI state is received, receiving a PDCCH according to an indication of the target MAC CE activation signaling, wherein the target MAC CE activation signaling is used to activate a TCI state of a CORESET, and the TCI state corresponds to a new beam; or after the BFRQ is sent, and before MAC CE activation signaling of a TCI state is received, assuming that an antenna port or a CORESET-BFR of a CORESET corresponding to the BFD RS group in which the beam failure event occurs has a QCL relationship with a new beam; wherein when a Beam Failure Recovery Response (BFRR) is not received in a preset window after the terminal reports the BFRQ comprising information about a new beam, a PDCCH is stilled received by using an original TCI state or an original beam; or before the terminal reports the BFRQ comprising information about a new beam and receives MAC CE activation signaling of a TCI state, a PDCCH is stilled received by using an original TCI state or an original beam.
  17. 17 . A terminal, comprising: a memory storing computer-readable instructions; and a processor coupled to the memory and configured to execute the computer-readable instructions, wherein the computer-readable instructions, when executed by the processor, cause the processor to perform operations comprising: triggering a beam failure event when a beam failure occurs on all Beam Failure Detection Reference Signals (BFD RSs) in each BFD RS group in M BFD RS groups; and sending a Beam Failure Recovery reQuest (BFRQ) when the beam failure event occurs, wherein: the BFRQ is related to the M BFD RS groups, and M is a positive integer greater than 1; the BFRQ comprises a group identification number identifying a BFD RS group in which the beam failure event occurs; where the triggering a beam failure event when a beam failure occurs on all Beam Failure Detection Reference Signals (BFD RSs) in each BFD RS group in M BFD RS groups comprises: when a beam failure occurs, reporting a Beam Failure Instance (BFI) to a higher layer; and increasing a beam failure counter corresponding to one of the M BFD RS groups in which a beam failure occurs by 1, wherein when a timer corresponding to the BFD RS group in which a beam failure occurs expires, the beam failure counter corresponding to the BFD RS group in which a beam failure occurs is restarted; and the sending a Beam Failure Recovery reQuest (BFRQ) when the beam failure event occurs comprises: sending the BFRQ when there is a beam failure counter whose value is greater than or equal to a second preset threshold in M beam failure counters configured for the terminal, wherein the M beam failure counters respectively correspond to the M BFD RS groups, and the second preset threshold of the beam failure counter corresponding to each BFD RS group is separately configured.
  18. 18 . The terminal according to claim 17 , wherein the BFRQ comprises information about one or more new beams, and the one or more new beams comprise: when the terminal is configured with one candidate beam set, one or more new beams selected from the one candidate beam set; when the terminal is configured with M candidate beam sets respectively corresponding to the M BFD RS groups, one or more new beams selected from a candidate beam set corresponding to the BFD RS group in which the beam failure event occurs; or when the terminal is configured with K candidate beam sets, one or more new beams selected from any candidate beam set or one or more candidate beams selected from a target candidate beam set, wherein K is greater than M, and the K candidate beam sets comprise M candidate beam sets respectively corresponding to the M BFD RS groups, wherein the target candidate beam set is a candidate beam set corresponding to a BFD RS group except a BFD RS group in which no beam failure occurs in the K candidate beam sets.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation of International Application No. PCT/CN2021/124976, filed on Oct. 20, 2021, which claims priority to Chinese Patent Application No. 202011149209.6, filed on Oct. 23, 2020. The entire contents of each of the above-identified applications are expressly incorporated herein by reference. TECHNICAL FIELD This application relates to the field of communications technologies, and in particular, to abeam failure recovery method and apparatus, a terminal, and a storage medium. BACKGROUND In a high-frequency band communications system, because a wavelength of a wireless signal is relatively short, a case that the signal is blocked or the like tends to occur during propagation, and consequently signal propagation is interrupted, for example, a beam failure. However, a current Beam Failure Recovery (BFR) mechanism is mainly for beam failure recovery of a single Transmission Reception Point (TRP). That is, the current beam failure recovery mechanism can only be applied to beam failure recovery of a single Beam Failure Detection Reference Signal (BFD RS) scenario, and consequently, a beam failure recovery effect of a terminal is relatively poor. SUMMARY This application provides a beam failure recovery method and apparatus, a terminal, and a storage medium. According to a first aspect, an embodiment of this application provides a beam failure recovery method, performed by a terminal and including: triggering a beam failure event in a first condition; andsending a beam failure recovery request (Beam Failure Recovery Request, BFRQ) in a case that the beam failure event occurs, wherethe first condition and/or the BFRQ are/is related to M beam failure detection reference signal BFD RS groups, and M is a positive integer greater than 1. According to a second aspect, an embodiment of this application provides a beam failure recovery apparatus, including: a trigger module, configured to trigger a beam failure event in a first condition; anda sending module, configured to send a beam failure recovery request BFRQ in a case that the beam failure event occurs, wherethe first condition and/or the BFRQ are/is related to M beam failure detection reference signal BFD RS groups, and M is a positive integer greater than 1. According to a third aspect, an embodiment of this application provides a terminal, including a memory, a processor, and a program or an instruction that is stored in the memory and that can be run on the processor, where the program or the instruction is executed by the processor to implement the steps of the beam failure recovery method. According to a fourth aspect, an embodiment of this application provides a readable storage medium. The readable storage medium stores a program or an instruction, and the program or the instruction is executed by a processor to implement the steps of the beam failure recovery method. According to a fifth aspect, a program product is provided. The program product is stored in a non-volatile storage medium, and the program product is executed by at least one processor to implement the steps of the beam failure recovery method. In the embodiments of this application, a beam failure event is triggered in a first condition; and a beam failure recovery request BFRQ is sent in a case that the beam failure event occurs, where the first condition and/or the BFRQ are/is related to M beam failure detection reference signal BFD RS groups, and M is a positive integer greater than 1. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a block diagram of a wireless communications system to which embodiments of this application can be applied; FIG. 2 is a flowchart of a beam failure recovery method according to an embodiment of this application; FIG. 3 is a flowchart of another beam failure recovery method according to an embodiment of this application; FIG. 4 is a structural diagram of a beam failure recovery apparatus according to an embodiment of this application; and FIG. 5 is a structural diagram of a terminal according to an embodiment of this application. DETAILED DESCRIPTION The following describes the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Apparently, the described embodiments are some but not all of the embodiments of this application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of this application shall fall within the protection scope of this application. In the specification and claims of this application, the terms “first,” “second,” and the like are intended to distinguish between similar objects but do not describe a specific order or sequence. It should be understood that, data termed in such a way is interchangeable in proper circumstances, so that the embodiments of this application can be implemented in an order other than the order illustrated or described herein. Objects classified by “f