US 11,812,473 B2
Random access procedures for new radio (NR) networks
Bharat Shrestha, San Diego, CA (US); Umesh Phuyal, San Diego, CA (US); Alberto Rico Alvarino, San Diego, CA (US); Xiao Feng Wang, San Diego, CA (US); Prasad Reddy Kadiri, San Diego, CA (US); Le Liu, Fremont, CA (US); and Liangping Ma, San Diego, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Feb. 2, 2021, as Appl. No. 17/165,272.
Claims priority of provisional application 62/971,821, filed on Feb. 7, 2020.
Prior Publication US 2021/0251012 A1, Aug. 12, 2021
Int. Cl. H04W 74/08 (2009.01); H04W 56/00 (2009.01); H04W 72/23 (2023.01); H04W 74/00 (2009.01)
CPC H04W 74/0833 (2013.01) [H04W 56/0005 (2013.01); H04W 56/0045 (2013.01); H04W 72/23 (2023.01); H04W 74/006 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A method of wireless communication by a user equipment (UE), comprising:
receiving information to estimate a propagation delay between the UE and a network node accessed via non-terrestrial communications;
transmitting, to the network node, a physical random access channel (PRACH) preamble a user specific timing advance period before a random access channel (RACH) occasion at the UE, the user specific timing advance period corresponding to the propagation delay between the UE and the network node; and
receiving a grant for an uplink shared channel, the uplink shared channel scheduled later than a start of a RAR window delayed by twice a maximum propagation delay in addition to a UE time offset, the maximum propagation delay corresponding to a cell specific longest propagation delay for a UE that is located farthest from the network node, the maximum propagation delay being a same delay for all UEs within a cell.