Beam failure handling method and terminal

Patent metadata

Field	Value
Publication number	US-12512894-B2
Application number	US-202217677415-A
Country	US
Kind code	B2
Filing date	Feb 22, 2022
Priority date	Aug 23, 2019
Publication date	Dec 30, 2025
Grant date	Dec 30, 2025

Abstract

Embodiments of this disclosure provide a beam failure handling method and a terminal. The method includes: triggering transmission of at least one of BFRQ information and a scheduling request SR for BFRQ if a beam failure occurs in an SCell, where the terminal has at least one of the following features related to the SCell: if a first condition is met, triggering transmission of at least one of subsequent BFRQ information and subsequent SRs for BFRQ is forbidden; triggering transmission of at least one SR for BFRQ is allowed; and triggering transmission of BFRQ information is restricted to one time; if a second condition is met, a BFI counter skips or stops counting; and if a third condition is met, a BFI counter is reset.

First claim

What is claimed is:

1 . A beam failure handling method, comprising:
triggering, by a terminal, transmission of at least one of beam failure recovery request (BFRQ) information and a scheduling request (SR) for BFRQ when a beam failure occurs in a secondary cell (SCell), wherein the terminal has the following feature related to the SCell: after the BFRQ information is transmitted, triggering transmission of subsequent BFRQ information is forbidden unconditionally or triggering transmission of an SR for BFRQ is forbidden unconditionally.

2 . The method according to claim 1 , wherein the terminal further has the following feature related to the SCell:
when a second condition is met, a beam failure instance (BFI) counter skips or stops counting.

3 . The method according to claim 2 , wherein the second condition comprises at least one of the following:
the SCell is released, the SCell is deactivated, a bandwidth part BWP is switched, and a beam failure occurs in the SCell.

4 . The method according to claim 3 , that when a third condition is met, a BFI counter is reset means: in a case that the second condition is not met, when the third condition is met, the BFI counter is reset.

5 . The method according to claim 1 , wherein
the terminal further has the following feature related to the SCell: when a third condition is met, a BFI counter is reset, wherein the third condition comprises at least one of the following: beam failure recovery succeeds, triggering transmission of subsequent BFRQ information is forbidden, triggering transmission of an SR for BFRQ is forbidden, the forbidding of the triggering transmission of subsequent BFRQ information is lifted, and the forbidding of the triggering transmission of an SR for BFRQ is lifted.

6 . The method according to claim 5 , wherein that the beam failure recovery succeeds comprises at least one of the following:
a physical downlink control channel (PDCCH) beam is switched; a beam failure detection reference signal (BFD RS) beam is switched; a physical downlink shared channel (PDSCH) beam is switched; first downlink control information (DCI) is received from a network side; first radio resource control (RRC) signaling is received from a network side; and a first media access control control element (MAC CE) command is received from a network side.

7 . The method according to claim 6 , wherein the first DCI has at least one of the following features:
the first DCI is transmitted on a dedicated control resource for beam failure recovery; a format of the first DCI is a DCI format with cyclic redundancy check (CRC) scrambled by a radio network temporary identifier (RNTI) for BFR; the first DCI is used for indicating beam information of a downlink channel or reference signal of the SCell in which the beam failure occurs; the first DCI is used for indicating performing beam measurement in the SCell in which the beam failure occurs; and the first DCI is used for transmitting acknowledgment information for the BFRQ information; wherein the first RRC signaling has at least one of the following features: the first RRC signaling comprises release signaling for the SCell in which the beam failure occurs; and the first RRC signaling is used for configuring beam information of a downlink channel or reference signal of the SCell in which the beam failure occurs; wherein the first MAC CE command has at least one of the following features: the first MAC CE command is used for activating beam information of a downlink channel or reference signal of the SCell in which the beam failure occurs; the first MAC CE command comprises deactivation signaling for the SCell in which the beam failure occurs; and the first MAC CE command is used for transmitting acknowledgment information for the BFRQ information.

8 . The method according to claim 1 , wherein
when a fourth condition is met, the forbidding of the triggering transmission of subsequent BFRQ information is lifted, or the forbidding of the triggering transmission of an SR for BFRQ is lifted.

9 . The method according to claim 8 , wherein the fourth condition comprises at least one of the following:
the SCell is released, the SCell is deactivated, a BWP is switched, and beam failure recovery succeeds.

10 . The method according to claim 1 , wherein the SR is a dedicated SR, and the SR is transmitted on a network-configured dedicated physical uplink control channel (PUCCH) resource for BFR.

11 . The method according to claim 1 , wherein the BFRQ information comprises at least one of the following:
index information and new beam information of the SCell in which the beam failure occurs.

12 . A terminal, comprising a memory, a processor, and a program stored in the memory and capable of running on the processor, wherein when the program is executed by the processor, the following steps are implemented:
triggering, by a terminal, transmission of at least one of beam failure recovery request (BFRQ) information and a scheduling request (SR) for BFRQ when a beam failure occurs in a secondary cell SCell, wherein the terminal has the following feature related to the SCell: after the BFRQ information is transmitted, triggering transmission of subsequent BFRQ information is forbidden unconditionally or triggering transmission of an SR for BFRQ is forbidden unconditionally.

13 . The terminal according to claim 12 , wherein the terminal further has the following feature related to the SCell:
when a second condition is met, a beam failure instance (BFI) counter skips or stops counting.

14 . The terminal according to claim 13 , wherein the second condition comprises at least one of the following:
the SCell is released, the SCell is deactivated, a bandwidth part (BWP) is switched, and a beam failure occurs in the SCell.

15 . The terminal according to claim 12 , wherein
when a fourth condition is met, the forbidding of the triggering transmission of subsequent BFRQ information is lifted, or the forbidding of the triggering transmission of an SR for BFRQ is lifted.

16 . The terminal according to claim 15 , wherein the fourth condition comprises at least one of the following:
the SCell is released, the SCell is deactivated, a BWP is switched, and beam failure recovery succeeds.

17 . The terminal according to claim 12 , wherein the terminal further has the following feature related to the SCell:
when a third condition is met, a BFI counter is reset, wherein the third condition comprises at least one of the following: beam failure recovery succeeds, triggering transmission of subsequent BFRQ information is forbidden, triggering transmission of an SR for BFRQ is forbidden, the forbidding of the triggering transmission of subsequent BFRQ information is lifted, and the forbidding of the triggering transmission of an SR for BFRQ is lifted.

18 . A non-transitory computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the following steps are implemented:
triggering, by a terminal, transmission of at least one of beam failure recovery request (BFRQ) information and a scheduling request (SR) for BFRQ when a beam failure occurs in a secondary cell (SCell), wherein the terminal has the following feature related to the SCell: after the BFRQ information is transmitted, triggering transmission of subsequent BFRQ information is forbidden unconditionally or triggering transmission of an SR for BFRQ is forbidden uncondi

Assignees

• Vivo Mobile Communication Co Ltd

Inventors

• Yang Yu
• Wu Yumin

Classifications

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04W80/02

  Data link layer protocols · CPC title

• H04W72/1263

  Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows · CPC title

• H04W72/046

  the resource being in the space domain, e.g. beams · CPC title

• H04W76/30

  Connection release · CPC title