Patent ID: 11877322
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method performed by a terminal in a wireless communication system, the method comprising:
receiving, from a base station, information on a maximum number of message A preamble transmissions;
identifying that a preamble transmission counter value for a 2-step random access procedure equals a value identified based on the information on the maximum number of message A preamble transmissions;
identifying a random access type from 2-step to 4-step;
identifying whether a first random access preambles group was selected during the 2-step random access procedure;
selecting a second random access preambles group for a contention-based 4-step random access procedure based on a message A configuration for the 2-step random access procedure, in case that the first random access preambles group was not selected during the 2-step random access procedure;
selecting the same first random access preambles group for the contention-based 4-step random access procedure, in case that the first random access preambles group was selected during the 2-step random access procedure; and
performing a random access preamble transmission for the contention-based 4-step random access procedure based on the selected random access preambles group.