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

Claim 4:
5. A method for performing communication using a non-terrestrial network with a user equipment (UE) by a network node, the method comprising:
transmitting system information comprising reference round trip delay offset information of a non-terrestrial network cell;
performing a random access procedure with the UE in the non-terrestrial network cell; and
transmitting configuration information for performing communication using the non-terrestrial network cell,
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:
receiving a message 3 (MSG 3) from the UE for a contention-based random access procedure, and
the UE starts 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.