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

Claim 7:
8. A terminal in a wireless communication system, the terminal comprising:
a transceiver; and
a controller configured to:
receive, from a base station via the transceiver, information on maximum number of message A preamble transmissions,
identify 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,
identify a random access type from 2-step to 4-step,
identify whether a first random access preambles group was selected during the 2-step random access procedure,
select 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,
select 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
perform a random access preamble transmission for the contention-based 4-step random access procedure based on the selected random access preambles group.