Patent ID: 11902938
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method performed by a terminal in a wireless communication system, the method comprising:
performing a measurement on multiple beams on a serving cell;
based on the measurement, identifying whether a beam failure for a serving beam of the multiple beams is detected, wherein a detection of the beam failure is performed based on a beam failure detection timer;
in case that the beam failure for the serving beam is detected, determining to initiate a random access procedure for a beam failure recovery;
based on a determination to initiate the random access procedure for the beam failure recovery, starting a beam failure recovery timer; and
during a running of the beam failure recovery timer, transmitting, to a base station, a random access preamble for a beam failure recovery request, based on a random access preamble dedicated to the beam failure recovery request,
wherein the random access preamble dedicated to the beam failure recovery request is associated with a selection of a suitable beam for the terminal, and
wherein the beam failure is detected in case that a number of beam failure instance is equal to or larger than a predetermined value.