CPC H04W 74/0833 (2013.01) [H04L 5/0048 (2013.01)] | 20 Claims |
1. A method for 2-step random access (RA) performed by a terminal in a communication system, the method comprising:
receiving, from a base station, a first random access channel (RACH) configuration for 4-step RA, a second RACH configuration for the 2-step RA, and physical uplink shared channel (PUSCH) configuration, the first RACH configuration including information on RA occasions for the 4-step RA;
in case that a type of a random access is the 2-step RA, identifying an RA occasion for the 2-step RA, wherein, in case that an index indicating a subset of the RA occasions for the 4-step RA shared with the 2-step RA is configured, the RA occasion for the 2-step RA is associated with the subset of the RA occasions for the 4-step RA, and wherein, in case that the index indicating the subset of the RA occasions for the 4-step RA shared with the 2-step RA is not configured, the RA occasion for the 2-step RA is associated with all of the RA occasions for the 4-step RA; and
transmitting, to the base station, a random access preamble in the RA occasion for the 2-step RA.
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