Patent ID: 11864236
Assignee: LG ELECTRONICS INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method of performing a 2-step random access channel (RACH) procedure by a user equipment (UE) in a wireless communication system, the method comprising:
transmitting, to a base station (BS), a preamble on a physical random access channel (PRACH) and a payload on a physical uplink shared channel (PUSCH) via a message A of the 2-step RACH procedure; and
receiving, from the BS, a message B related to contention resolution after transmitting the message A,
wherein an index related to a reference signal used for transmission power allocation to the PUSCH is same as an index of a resource used for channel measurement for transmission of the PRACH, based on that the PRACH and the PUSCH are transmitted via the message A,
wherein a transmission power of the PUSCH is determined based on a preamble received target power, and an offset related to the preamble received target power,
wherein the PRACH transmitted via the message A and the PUSCH transmitted via the message A are transmitted based on a predetermined time gap in a time domain,
wherein a transmission beam for transmission of the PUSCH is selected based on a path loss for the transmission power allocation,
wherein the path loss is calculated based on channel estimation performed between the transmission of the PRACH and the transmission of the PUSCH, and
wherein the index related to the reference signal is used for calculating the path loss.