Invention Publication
- Patent Title: SYSTEMS AND METHODS FOR BEAM FAILURE RECOVERY ENHANCEMENT
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Application No.: US17593294Application Date: 2021-06-07
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Publication No.: US20240063877A1Publication Date: 2024-02-22
- Inventor: Yushu ZHANG , Chunxuan YE , Dawei ZHANG , Haitong SUN , Hong HE , Huaning NIU , Seyed Ali Akbar FAKOORIAN , Sigen YE , Wei ZENG
- Applicant: APPLE INC.
- Applicant Address: US CA Cupertino
- Assignee: APPLE INC.
- Current Assignee: APPLE INC.
- Current Assignee Address: US CA Cupertino
- International Application: PCT/CN2021/098626 2021.06.07
- Date entered country: 2021-09-15
- Main IPC: H04B7/06
- IPC: H04B7/06 ; H04B17/318

Abstract:
Systems and methods for beam failure recovery (BFR) are disclosed herein. A user equipment (UE) receives downlink (DL) reference signal(s) on corresponding beam(s) from a base station. The UE performs beam failure detection (BFD) on such beams used for user data to determine whether a beam failure has occurred, and candidate beam detection (CBD) on such beams not used for user data to identify candidate beams for recovering from the beam failure. The BFD and the CBD are based on both uplink (UL) channel performance considerations and DL channel performance considerations, as determined using the DL reference signal(s), such that a beam failure may be determined in the UL, the DL, or both, and a candidate beam may be identified for UL, DL, or both. The UE sends a beam failure recovery request BFRQ with this information to the base station, and the system changes beams accordingly.
Public/Granted literature
- US12166559B2 Systems and methods for beam failure recovery enhancement Public/Granted day:2024-12-10
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