Method and user equipment for executing beam recovery, and method and base station for supporting same
AssigneeLG Electronics Inc.
InventorsKijun Kim, Sukhyon Yoon, Jiwon Kang, Eunsun Kim
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Abstract
The user equipment transmits a scheduling request by means of a scheduling request channel resource configured in the user equipment for beam recovery when uplink data is generated in the user equipment or when paging data is received therefor from a base station while the user equipment is in a discontinuous reception (DRX) mode. The user equipment receives an uplink grant in response to the scheduling request.
Claims14
A method of performing a beam failure recovery procedure by a user equipment (UE) in a wireless communication system, the method comprising:
- receiving, by the UE from a base station (BS), first configuration information regarding a random access resource for a beam failure recovery;
- detecting, by the UE, a downlink beam failure;
- and
- performing, by the UE, a contention-free random access (CFRA) procedure for the beam failure recovery on the random access resource, based on detecting the downlink beam failure and based on the first configuration information,
- wherein the first configuration information includes information regarding a maximum number of attempts for the beam failure recovery, and the method further comprises:
- determining whether the number of attempts for the CFRA procedure related to the beam failure recovery reaches the maximum number;
- and
- performing a contention-based random access (CBRA) procedure to perform access to a cell, based on the number of attempts for the CFRA procedure related to the beam failure recovery reaching the maximum number.
A user equipment (UE) for performing a beam recovery procedure in a wireless communication system, the UE comprising,
- a radio frequency (RF) transceiver;
- a processor;
- and
- a computer memory storing at least one program which, when executed, causes the processor to perform operations comprising:
- receiving, through the RF transceiver from a base station (BS), first configuration information regarding a random access resource for a beam failure recovery;
- detecting a downlink beam failure;
- and
- performing a contention-free random access (CFRA) procedure for the beam failure recovery on the random access resource, based on detecting the downlink beam failure and based on the first configuration information,
- wherein the first configuration information includes information regarding a maximum number of attempts for the beam failure recovery, and the operations further comprise:
- determining whether the number of attempts for the CFRA procedure related to the beam failure recovery reaches the maximum number;
- and
- performing a contention-based random access (CBRA) procedure to perform access to a cell, based on a determination that the number of attempts for the CFRA procedure related to the beam failure recovery reaching the maximum number.
Dependencies are inferred from the claim text.