Patent ID: 11924665
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A method performed by a terminal in a communication system, the method comprising:
receiving a radio resource control (RRC) message including configuration information associated with a medium access control (MAC) control element (CE) for beam failure recovery;
detecting beam failure based on a quality of a signal associated with the beam failure being lower than a first threshold; and
based on the beam failure being detected in a first cell:
based on a configuration of a physical uplink control channel (PUCCH) for transmitting a scheduling request (SR) for requesting uplink resources being not provided for the terminal:
transmitting a first random access preamble;
receiving a first random access response associated with the first random access preamble; and
transmitting the MAC CE for the beam failure recovery for the first cell based on the configuration information and the first random access response; and

based on the configuration of the PUCCH being provided for the terminal:
transmitting, based on the configuration of the PUCCH, the SR;
receiving scheduling information for the uplink resources requested by the SR; and
transmitting, on the uplink resources, the MAC CE for the beam failure recovery for first cell.