Patent ID: 11889347
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A user equipment (UE) in a wireless communication system, the UE comprising:
a transceiver; and
a controller coupled with the transceiver, and configured to:
receive, from a base station, a system information block 1 (SIB1) including information on a time alignment timer common value,
transmit, to the base station, a random access preamble of a random access procedure for a transition from a radio resource control (RRC) inactive state to an RRC connected state,
receive, from the base station, a random access response including a timing advance command, as a response to the random access preamble,
apply the timing advance command based on the reception of the timing advance command included in the random access response,
start a time alignment timer by applying the time alignment timer common value included in the SIB1, based on the reception of the timing advance command included in the random access response, and
transmit, to the base station, an uplink-common control channel (UL-CCCH) message of the random access procedure based on the reception of the random access response, wherein the UL-CCCH message includes an RRC resume request message.