US 11,812,479 B2
Method and apparatus for random access in communication system
Ji Soo Park, Daejeon (KR); Il Gyu Kim, Daejeon (KR); Hee Sang Chung, Daejeon (KR); Yong Seouk Choi, Daejeon (KR); Jun Hyeong Kim, Daejeon (KR); and Go San Noh, Daejeon (KR)
Assigned to ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, Daejeon (KR)
Filed by ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, Daejeon (KR)
Filed on Nov. 3, 2021, as Appl. No. 17/517,769.
Claims priority of application No. 10-2020-0148151 (KR), filed on Nov. 6, 2020; and application No. 10-2021-0140367 (KR), filed on Oct. 20, 2021.
Prior Publication US 2022/0150985 A1, May 12, 2022
Int. Cl. H04W 74/08 (2009.01); H04W 74/00 (2009.01)
CPC H04W 74/0841 (2013.01) [H04W 74/006 (2013.01); H04W 74/0866 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An operation method of a terminal in a communication system, the operation method comprising:
receiving, from a base station, primary random access (RA) configuration information for a primary RA procedure;
receiving, from the base station, secondary RA configuration information for a secondary RA procedure;
transmitting a primary RA preamble to the base station by using a primary RA resource indicated by the primary RA configuration information;
receiving, from the base station, secondary RA indication information in response to the primary RA preamble, the secondary RA indication information indicating to perform the secondary RA procedure instead of the primary RA procedure; and
transmitting a secondary RA preamble to the base station by using a secondary RA resource indicated by the secondary RA configuration information,
wherein the secondary RA resource activated by the secondary RA indication information is used during a valid time indicated by secondary RA valid time information configured by the base station.