US 12,348,982 B2
Techniques for indicating a preferred beam in wireless communication random access
Vinay Chande, San Diego, CA (US); Xiaoxia Zhang, San Diego, CA (US); Tao Luo, San Diego, CA (US); Arumugam Chendamarai Kannan, San Diego, CA (US); Makesh Pravin John Wilson, San Diego, CA (US); Wooseok Nam, San Diego, CA (US); Sungwoo Park, San Diego, CA (US); and Jing Sun, San Diego, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Jan. 23, 2020, as Appl. No. 16/750,828.
Claims priority of provisional application 62/805,211, filed on Feb. 13, 2019.
Claims priority of provisional application 62/796,551, filed on Jan. 24, 2019.
Prior Publication US 2020/0245157 A1, Jul. 30, 2020
Int. Cl. H04W 16/28 (2009.01); H04W 56/00 (2009.01); H04W 74/0833 (2024.01)
CPC H04W 16/28 (2013.01) [H04W 56/001 (2013.01); H04W 74/0833 (2013.01)] 33 Claims
OG exemplary drawing
 
1. A method for wireless communication, comprising:
receiving multiple synchronization signal blocks (SSBs) from a base station, wherein the multiple SSBs are each beamformed based on a different directional beam;
selecting a signature from a signature space of a first SSB of the multiple SSBs, wherein the signature indicates a random access preamble and random access resources associated with the first SSB, wherein the signature space of the first SSB includes multiple groups of signatures, each signature in the signature space indicating a random access preamble and random access resources for indicating a selection for using the first SSB, wherein each group of signatures of the multiple groups of signatures is further associated with indicating a preference for using a preferred SSB that is different from the first SSB, such that selection of the signature indicates both of the selection for using the first SSB and the preference for using the preferred SSB for subsequent communications;
transmitting, based on the signature, a random access message including the random access preamble to the base station over the random access resources associated with the first SSB;
receiving, in response to the random access message, a second random access message from the base station, wherein the second random access message indicates quasi-colocation of the second random access message with one of the first SSB or the preferred SSB; and
determining whether the second random access message indicates quasi-colocation of the second random access message with the first SSB or indicates quasi-colocation of the second random access message with the preferred SSB.