Invention Grant
- Patent Title: Managing beam failure recovery random access
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Application No.: US17174751Application Date: 2021-02-12
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Publication No.: US11589394B2Publication Date: 2023-02-21
- Inventor: Hamed Pezeshki , Yan Zhou , Tao Luo , Ruhua He , Yong Li
- Applicant: QUALCOMM Incorporated
- Applicant Address: US CA San Diego
- Assignee: QUALCOMM Incorporated
- Current Assignee: QUALCOMM Incorporated
- Current Assignee Address: US CA San Diego
- Agency: The Marbury Law Group
- Main IPC: H04W74/08
- IPC: H04W74/08 ; H04W74/04 ; H04W72/04 ; H04L5/00 ; H04W76/19

Abstract:
Embodiments include methods that may be performed by a processor of a mobile device and a processor of a base station for managing beam failure recovery (BFR). The processor of the mobile device may determine whether a beam failure of a communication link with a base station has occurred, determine whether contention free random access (CFRA) resources have been configured in response to determining that a beam failure has occurred, and initiate contention based random access (CBRA) in response to determining that CFRA resources have not been configured. The processor of the base station may receive from the mobile device a message initiating CBRA, determine whether a downlink beam or quasi-colocation (QCL) assumption a downlink resource of a physical random access channel (PRACH) is different from any active downlink beam or QCL assumption, and perform CBRA with the mobile device.
Public/Granted literature
- US20210259022A1 Managing Beam Failure Recovery Random Access Public/Granted day:2021-08-19
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