Patent ID: 11910468
Assignee: KT CORPORATION
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method for performing communication using a non-terrestrial network by a user equipment (UE), the method comprising:
receiving system information comprising reference round trip delay offset information of a non-terrestrial network cell;
performing a random access procedure in the non-terrestrial network cell;
receiving configuration information for performing communication using the non-terrestrial network cell; and
controlling a discontinuous reception (DRX) operation based on the configuration information,
wherein the reference round trip delay offset information is used to calculate a round trip delay between the UE and a network node in the non-terrestrial network cell, and
wherein the performing the random access comprises:
transmitting a message 3 (MSG 3) for a contention-based random access procedure;
starting a timer for contention resolution when a time according to the round trip delay between the UE and the network node calculated using the reference round trip delay offset information elapses after transmission of the message 3.