US 11,723,067 B2
Supporting cross-TAG scheduling and 2-step RACH payload transmission for a PDCCH-ordered contention-free random access procedure
Jing Lei, San Diego, CA (US); Kazuki Takeda, Tokyo (JP); Seyedkianoush Hosseini, San Diego, CA (US); Wanshi Chen, San Diego, CA (US); and Peter Gaal, San Diego, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Jul. 15, 2020, as Appl. No. 16/929,925.
Claims priority of provisional application 62/875,768, filed on Jul. 18, 2019.
Prior Publication US 2021/0022180 A1, Jan. 21, 2021
Int. Cl. H04W 4/00 (2018.01); H04W 74/08 (2009.01); H04L 5/00 (2006.01); H04L 5/10 (2006.01); H04W 72/0446 (2023.01); H04W 74/02 (2009.01); H04W 72/23 (2023.01)
CPC H04W 74/0808 (2013.01) [H04L 5/0051 (2013.01); H04L 5/10 (2013.01); H04W 72/0446 (2013.01); H04W 72/23 (2023.01); H04W 74/02 (2013.01); H04W 74/0833 (2013.01)] 30 Claims
OG exemplary drawing
 
1. A method of wireless communication performed by a user equipment (UE), comprising:
receiving, via a first cell, downlink control information for physical downlink control channel ordered contention-free random access, wherein the downlink control information indicates a timing advance group of a second cell and one or more parameters associated with a random access message to be transmitted by the UE via the second cell, wherein the first cell and the second cell belong to different timing advance groups,
wherein the downlink control information includes one or more bits indicating whether the random access message is to be transmitted as part of a two-step random access procedure or a four-step random access procedure; and
transmitting, based on receiving the downlink control information, the random access message via the second cell according to the one or more parameters and a timing advance value determined based at least in part on the timing advance group of the second cell.