US 12,309,847 B2
Downlink radio resource control message transmission in 2-step random access
Fangli Xu, Beijing (CN); Haijing Hu, Beijing (CN); Yuqin Chen, Beijing (CN); Dawei Zhang, Saratoga, CA (US); Wei Zeng, San Diego, CA (US); and Haitong Sun, Irvine, CA (US)
Assigned to Apple Inc., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Jun. 27, 2023, as Appl. No. 18/342,584.
Application 18/342,584 is a continuation of application No. 17/573,413, filed on Jan. 11, 2022, granted, now 11,737,148.
Application 17/573,413 is a continuation of application No. 16/885,937, filed on May 28, 2020, granted, now 11,265,925, issued on Mar. 1, 2022.
Claims priority of application No. 201910745594.1 (CN), filed on Aug. 13, 2019.
Prior Publication US 2023/0345545 A1, Oct. 26, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 74/0833 (2024.01); H04L 5/00 (2006.01); H04W 76/11 (2018.01); H04W 76/27 (2018.01); H04W 80/02 (2009.01)
CPC H04W 74/0833 (2013.01) [H04L 5/0055 (2013.01); H04W 76/11 (2018.02); H04W 76/27 (2018.02); H04W 80/02 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for operating a base station, the method comprising:
transmitting random access configuration information for 2-step random access;
receiving, from first and second user equipment devices (UEs), first and second initial messages of 2-step random access, MsgA, according to the random access configuration information; and
transmitting, in response to the first and second initial messages of 2-step random access, MsgA:
a first response message for the first UE, the first response message including a fallback random access response (RAR); and
a second response message for the second UE, the second response message including:
a first sub protocol data unit (subPDU), of a protocol data unit (PDU), the first subPDU comprising a success RAR and a subheader indicating that a downlink (DL) radio resource control (RRC) message is included in the second response message; and
a second subPDU of the PDU including the DL RRC message, wherein the second subPDU successively follows the first subPDU.