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US-12628229-B2 - Method and apparatus for beam failure detection, request, and recovery under a unified TCI framework

US12628229B2US 12628229 B2US12628229 B2US 12628229B2US-12628229-B2

Abstract

Methods and apparatuses for beam failure detection, request, and recovery under a unified transmission configuration indication (TCI) framework in a wireless communication system. A method for operating a user equipment (UE) includes receiving information associated with a transmission configuration indication (TCI) state for the UE and identifying, based on the information, an uplink (UL) TCI state or a joint downlink (DL) and UL TCI state for a physical uplink control channel (PUCCH). The method further includes determining, based on the UL TCI state or the joint DL and UL TCI state for the PUCCH, a first beam failure detection (BFD) reference signal (RS) to monitor and monitoring for an UL beam failure based on the first BFD RS.

Inventors

  • Dalin ZHU
  • Eko Onggosanusi
  • Emad N. Farag

Assignees

  • SAMSUNG ELECTRONICS CO., LTD.

Dates

Publication Date
20260512
Application Date
20221130

Claims (11)

  1. 1 . A user equipment (UE) in a wireless communication system, the UE comprising: a transceiver; and a processor operably controller coupled with the transceiver, and configured to: receive, from a base station, information associated with a transmission configuration indication (TCI) state, wherein the information associated with the TCI state indicates a set of beam failure detection-reference signal (BFD-RS) for monitoring for an uplink (UL) beam failure and a downlink (DL) beam failure, based on the information associated with the TCI state, identify a UL TCI state or a joint DL and UL TCI state for a physical uplink control channel (PUCCH), based on the UL TCI state or the joint DL and UL TCI state for the PUCCH, determine a first BFD-RS for monitoring the UL beam failure from the set of BFD-RS and monitor the UL beam failure based on the first BFD RS, based on the information associated with the TCI state, identify a DL TCI state or a joint DL and UL TCI state for a physical downlink control channel (PDCCH), based on the UL TCI state or the joint DL and UL TCI state for the PDCCH, determine a second BFD-RS for monitoring the DL beam failure from the set of BFD-RS, and monitor for the DL beam failure based on the second BFD-RS.
  2. 2 . The UE of claim 1 , wherein the processer controller is further configured to: in case that a radio link quality of the first BFD-RS is worse than a Qout, increase a first beam failure index (BFI) count in a first BFI counter for the first BFD-RS, and in case that the first BFI counter reaches a maximum number of a first BFI counts, declare the UL beam failure.
  3. 3 . The UE of claim 1 , wherein the controller is further configured to: in case that a radio link quality of the second BFD-RS is worse than a Qout, increase a second beam failure index (BFI) count in a second BFI counter for the set of BFD-RS, and in case that the second BFI counter reaches a maximum number of a second BFI counts, declare the DL beam failure.
  4. 4 . The UE of claim 1 , wherein the controller is further configured to: based on a received new beam identification-reference signal (NBI-RS) set, identify a set of new beam identification (NBI) RSs for recovering the UL beam failure and the DL beam failure, and based on the set of NBI RSs, determine a UL beam or a DL beam for recovery.
  5. 5 . A base station in a wireless communication system, the base station comprising: a transceiver; and a controller coupled with the transceiver, and configured to: transmit, to a user equipment (UE), information associated with a transmission configuration indication (TCI) state, wherein the information associated with the TCI state indicates a set of beam failure detection-reference signal (BFD-RS) for monitoring for an uplink (UL) beam failure and a downlink (DL) beam failure, transmit, to the UE, a first BFD-RS for the UL beam failure from the set of BFD-RS, wherein the first BFD-RS is based on a UL TCI state or a joint DL and UL TCI state for a physical uplink control channel (PUCCH), and transmit, to the UE, a second BFD-RS for the UL beam failure from the set of BFD-RS, wherein the second BFD-RS is based on a DL TCI state or the joint DL and UL TCI state for a physical downlink control channel (PDCCH).
  6. 6 . The base station of claim 5 , wherein the UL beam failure is determined in case that a first beam failure index (BFI) counter for the first BFD-RS reaches a maximum number of first BFI counts, wherein a first BFI count in the first BFI counter is increased in case that a radio link quality of the first BFD-RS is worse than a Qout, wherein the DL beam failure is determined in case that a second BFI counter for the second BFD-RS reaches a maximum number of second BFI counts, and wherein a second BFI count in the second BFI counter is increased in case that a radio link quality of the second BFD-RS is worse than a Qout.
  7. 7 . The base station of claim 5 , wherein the controller is further configured to: based on the first BFD-RS, receive, from the UE, first information indicating the UL beam failure, and based on the second BFD-RS, receive, from the UE, second information indicating the DL beam failure.
  8. 8 . A method for operating performed by a user equipment (UE) in a wireless communication system, the method comprising: receiving, from a base station, information associated with a transmission configuration indication (TCI) state, wherein the information associated with the TCI state indicates a set of beam failure detection-reference signal (BFD-RS) for monitoring for an uplink (UL) beam failure and a downlink (DL) beam failure; based on the information associated with the TCI state, identifying a UL TCI state or a joint DL and UL TCI state for a physical uplink control channel (PUCCH); based on the UL TCI state or the joint DL and UL TCI state for the PUCCH, determining a first BFD-RS for monitoring the UL beam failure from the set of BFD-RS; monitoring the UL beam failure based on the first BFD-RS; based on the information associated with the TCI state, identifying a DL TCI state or a joint DL and UL TCI state for a physical downlink control channel (PDCCH); based on the DL TCI state or the joint DL and UL TCI state for the PDCCH, determining a second BFD-RS for monitoring the DL beam failure from the set of BFD-RS; and monitoring for the DL beam failure based on the second BFD-RS.
  9. 9 . The method of claim 8 , further comprising: in case that a radio link quality of the first BFD-RS is worse than a Qout, increasing a first beam failure index (BFI) count in a first BFI counter for the first BFD-RS; and in case that the first BFI counter reaches a maximum number of a first BFI counts, declaring the UL beam failure.
  10. 10 . The method of claim 8 , further comprising: in case that a radio link quality of the second BFD-RS is worse than a Qout, increasing a second beam failure index (BFI) count in a second BFI counter for the set of BFD-RS; and in case that the second BFI counter reaches a maximum number of a second BFI counts, declaring the DL beam failure.
  11. 11 . The method of claim 8 , further comprising: based on a received new beam identification-reference signal (NBI-RS) set, identifying, a set of new beam identification (NBI) RSs for recovering the UL beam failure and the DL beam failure; and based on the set of NBI RSs, determining a UL beam or a DL beam for recovery.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS AND CLAIM OF PRIORITY The present application claims priority to the U.S. Provisional Patent Application No. 63/286,856, filed on Dec. 7, 2021. The contents of the above-identified patent documents are incorporated herein by reference. TECHNICAL FIELD The present disclosure relates generally to wireless communication systems and, more specifically, the present disclosure relates to a beam failure detection, request, and recovery under a unified transmission configuration indication (TCI) framework in a wireless communication system. BACKGROUND 5th generation (5G) or new radio (NR) mobile communications is recently gathering increased momentum with all the worldwide technical activities on the various candidate technologies from industry and academia. The candidate enablers for the 5G/NR mobile communications include massive antenna technologies, from legacy cellular frequency bands up to high frequencies, to provide beamforming gain and support increased capacity, new waveform (e.g., a new radio access technology (RAT)) to flexibly accommodate various services/applications with different requirements, new multiple access schemes to support massive connections, and so on. SUMMARY The present disclosure relates to wireless communication systems and, more specifically, the present disclosure relates to a beam failure detection, request, and recovery under a unified TCI framework in a wireless communication system. In one embodiment, a user equipment (UE) is provided. The UE includes a transceiver configured to receive information associated with a transmission configuration indication (TCI) state for the UE and a processor operably coupled to the transceiver. The processor is configured to identify, based on the information, an uplink (UL) TCI state or a joint downlink (DL) and UL TCI state for a physical uplink control channel (PUCCH); determine, based on the UL TCI state or the joint DL and UL TCI state for the PUCCH, a first beam failure detection (BFD) reference signal (RS) to monitor; and monitor, via the transceiver, for an UL beam failure based on the first BFD RS. In another embodiment, a base station (BS) is provided. The BS includes a transceiver configured to transmit information associated with a TCI state for a UE. The information indicates an UL TCI state or a joint DL and UL TCI state for a PUCCH. The UL TCI state or the joint DL and UL TCI state for the PUCCH indicates a first BFD RS for the UE to monitor for an UL beam failure. The transceiver is further configured to transmit the first BFD RS. In yet another embodiment, a method for operating a UE is provided. The method includes receiving information associated with a TCI state for the UE and identifying, based on the information, an UL TCI state or a joint DL and UL TCI state for a PUCCH. The method further includes determining, based on the UL TCI state or the joint DL and UL TCI state for the PUCCH, a first beam failure detection BFD RS to monitor and monitoring for an UL beam failure based on the first BFD RS. Other technical features may be readily apparent to one skilled in the art from the following figures, descriptions, and claims. Before undertaking the DETAILED DESCRIPTION below, it may be advantageous to set forth definitions of certain words and phrases used throughout this patent document. The term “couple” and its derivatives refer to any direct or indirect communication between two or more elements, whether or not those elements are in physical contact with one another. The terms “transmit,” “receive,” and “communicate,” as well as derivatives thereof, encompass both direct and indirect communication. The terms “include” and “comprise,” as well as derivatives thereof, mean inclusion without limitation. The term “or” is inclusive, meaning and/or. The phrase “associated with,” as well as derivatives thereof, means to include, be included within, interconnect with, contain, be contained within, connect to or with, couple to or with, be communicable with, cooperate with, interleave, juxtapose, be proximate to, be bound to or with, have, have a property of, have a relationship to or with, or the like. The term “controller” means any device, system, or part thereof that controls at least one operation. Such a controller may be implemented in hardware or a combination of hardware and software and/or firmware. The functionality associated with any particular controller may be centralized or distributed, whether locally or remotely. The phrase “at least one of,” when used with a list of items, means that different combinations of one or more of the listed items may be used, and only one item in the list may be needed. For example, “at least one of: A, B, and C” includes any of the following combinations: A, B, C, A and B, A and C, B and C, and A and B and C. Moreover, various functions described below can be implemented or supported by one or more computer programs, each of which is formed from