Patent ID: 11930526
Assignee: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An operation method of a terminal in a communication system, the operation method comprising:
transmitting a first message A (MsgA) including a random access (RA) preamble #i and a payload to a base station;
receiving, from the base station, a message B (MsgB) including information indicating an RA preamble #k; and
transmitting a second MsgA including the RA preamble #k and data to the base station in a preamble reservation period,
wherein each of i and k is a natural number, and
wherein when i is equal to k, the data is transmitted on a physical uplink shared channel (PUSCH) occasion associated with the RA preamble #i selected by the terminal.