US 12,016,021 B2
Reporting uplink control information in a random access procedure
Yisheng Xue, San Diego, CA (US); Xiaoxia Zhang, San Diego, CA (US); Sony Akkarakaran, Poway, CA (US); Ozcan Ozturk, San Diego, CA (US); Jing Sun, San Diego, CA (US); Tao Luo, San Diego, CA (US); and Linhai He, San Diego, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Mar. 17, 2020, as Appl. No. 16/821,728.
Claims priority of provisional application 62/830,180, filed on Apr. 5, 2019.
Prior Publication US 2020/0322948 A1, Oct. 8, 2020
Int. Cl. H04W 72/21 (2023.01); H04J 3/02 (2006.01); H04W 74/08 (2009.01); H04W 74/0833 (2024.01)
CPC H04W 72/21 (2023.01) [H04J 3/02 (2013.01); H04W 74/0833 (2013.01)] 29 Claims
OG exemplary drawing
 
1. A method of wireless communication performed by a user equipment (UE), comprising:
transmitting, in a random access occasion and using a first set of resources, a first random access message, that is a first step of a two-step random access channel (RACH) procedure, comprising:
a first random access preamble identifier corresponding to a preamble of the first random access message, and
first uplink control information (UCI) comprising an indication of a downlink beam,
wherein the downlink beam is different from a default beam corresponding to the preamble of the first random access message and further to the random access occasion, or
wherein the downlink beam is selected from a set of multiple downlink beams corresponding to the random access occasion;
receiving, based at least in part on transmitting the first random access message, a first random access response comprising:
a second random access preamble identifier,
at least one of:
at least a portion of a second UCI, or
information identifying a second set of resources, and
an indication to fall back to a four-step RACH procedure;
transmitting a second random access message, of the four-step RACH procedure, based at least in part on:
the first random access preamble identifier matching the second random access preamble identifier, and
at least one of:
at least a portion of the first UCI matching the at least the portion of the second UCI, or
the first set of resources matching the second set of resources; and
receiving, using the downlink beam and based at least in part on transmitting the second random access message, a second random access response of the four-step RACH procedure.