US 12,284,690 B2
Random access procedure
Ruiming Zheng, Beijing (CN); Linhai He, San Diego, CA (US); Chao Wei, Beijing (CN); Jing Lei, San Diego, CA (US); Xiaoxia Zhang, San Diego, CA (US); Ozcan Ozturk, San Diego, CA (US); and Gavin Bernard Horn, La Jolla, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Appl. No. 17/593,522
Filed by QUALCOMM Incorporated, San Diego, CA (US)
PCT Filed Apr. 8, 2020, PCT No. PCT/CN2020/083627
§ 371(c)(1), (2) Date Sep. 20, 2021,
PCT Pub. No. WO2020/207392, PCT Pub. Date Oct. 15, 2020.
Claims priority of application No. PCT/CN2019/082238 (WO), filed on Apr. 11, 2019; and application No. PCT/CN2019/085126 (WO), filed on Apr. 30, 2019.
Prior Publication US 2022/0167401 A1, May 26, 2022
Int. Cl. H04W 74/0833 (2024.01); H04L 1/00 (2006.01); H04W 74/00 (2009.01); H04W 74/04 (2009.01); H04W 74/08 (2024.01); H04W 80/02 (2009.01)
CPC H04W 74/085 (2013.01) [H04L 1/0025 (2013.01); H04W 74/002 (2013.01); H04W 74/04 (2013.01); H04W 74/08 (2013.01); H04W 80/02 (2013.01)] 30 Claims
OG exemplary drawing
 
1. A method of wireless communication performed by a user equipment (UE), comprising:
attempting a random access by transmitting a random access message associated with a two-step random access procedure, wherein:
the random access message comprises a preamble and a payload in a single uplink message, and
the payload comprises contention resolution information included in a common control channel service data unit;
receiving a random access response that includes:
a medium access control (MAC) subheader that includes a set of reserved bits, and
a MAC control element (MAC CE) that includes a contention resolution identity associated with the contention resolution information of the payload of the random access message,
wherein the contention resolution identity, in conjunction with the set of reserved bits, indicates that the preamble of the random access message and the payload of the random access message were successfully received; and
completing the two-step random access procedure based at least in part on the contention resolution identity and the set of reserved bits indicating that the preamble of the random access message and the payload of the random access message were successfully received.