Invention Grant
- Patent Title: Beam failure recovery
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Application No.: US16958786Application Date: 2019-01-08
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Publication No.: US11570818B2Publication Date: 2023-01-31
- Inventor: Samuli Turtinen , Timo Koskela
- Applicant: Nokia Technologies Oy
- Applicant Address: FI Espoo
- Assignee: Nokia Technologies Oy
- Current Assignee: Nokia Technologies Oy
- Current Assignee Address: FI Espoo
- Agency: Nokia Technologies Oy
- International Application: PCT/FI2019/050008 WO 20190108
- International Announcement: WO2019/141898 WO 20190725
- Main IPC: H04W74/08
- IPC: H04W74/08 ; H04W72/04 ; H04W84/04

Abstract:
There is provided a method comprising: determining that a random access procedure is to be applied in response to initiating a beam failure recovery, BFR, procedure; selecting a beam with which the random access procedure is to be attempted; determining whether or not the selected beam is allocated with a contention free preamble; and performing one of the following: 1) upon determining the positive, applying a contention free random access, CFRA, procedure based on a first limit for an access attempt counter; and 2) upon determining the negative, applying a contention based random access, CBRA, procedure based on a second limit for the access attempt counter, wherein the first and second limits are different.
Public/Granted literature
- US20200351954A1 BEAM FAILURE RECOVERY Public/Granted day:2020-11-05
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