US Patent No. 10,893,546

METHOD AND APPARATUS FOR PERFORMING RANDOM ACCESS IN A MOBILE COMMUNICATION SYSTEM


Patent No. 10,893,546
Issue Date January 12, 2021
Title Method And Apparatus For Performing Random Access In A Mobile Communication System
Inventorship Woo-Seong Kim, Gwacheon-si (KR)
Soeng-Hun Kim, Suwon-si (KR)
Himke Van Der Velde, Zwolle (NL)
Assignee Samsung Electronics Co., Ltd., Suwon-si (KR)

Claim of US Patent No. 10,893,546

1. A method by a terminal in a wireless communication system, the method comprising:receiving, from a master base station, a message to add a cell of a secondary cell group (SCG) associated with a secondary base station for the terminal;
starting, in case that the message includes information for synchronous reconfiguration to a primary SCG cell, a timer with a timer value included in the information for the synchronous reconfiguration;
transmitting, to the master base station, a response message in response to the message; and
initiating, in case that the message includes the information for the synchronous reconfiguration to the primary SCG cell, a random access procedure on the primary SCG cell among SCG cells, based on preamble information included in the information for the synchronous reconfiguration;
wherein the timer is stopped in case that the random access procedure on the primary SCG cell is completed successfully.