US Patent No. 10,433,342

ENHANCED RANDOM ACCESS CHANNEL (RACH) PROCEDURE


Patent No. 10,433,342
Issue Date October 01, 2019
Title Enhanced Random Access Channel (rach) Procedure
Inventorship Sony Akkarakaran, Poway, CA (US)
Tao Luo, San Diego, CA (US)
Ajay Gupta, San Diego, CA (US)
Sumeeth Nagaraja, San Diego, CA (US)
Vinod Menon, San Diego, CA (US)
Assignee QUALCOMM Incorporated, San Diego, CA (US)

Claim of US Patent No. 10,433,342

1. A method, of a random access channel (RACH) procedure at a user equipment (UE), comprising:selecting, at the UE, between a two-step RACH procedure or a four-step RACH procedure,
wherein the selecting is based at least on RACH configuration information received, from a base station or the RACH configuration information at the UE,
wherein selecting between the two-step or the four-step RACH procedure comprises:
determining, at the UE, a reference signal received power (RSRP) value of a synchronization signal or a reference signal, received from the base station, based at least on the received RACH configuration information; and
selecting the two-step RACH procedure in response to determining that the RSRP value of the synchronization signal or the reference signal is equal to or greater than a threshold or selecting the four-step RACH procedure in response to determining that the RS RP value of the synchronization signal or the reference signal is less than a threshold; and
transmitting, from the UE, one or more messages associated with the two-step RACH procedure or the four-step RACH procedure based on the selection.