US 11,723,073 B2
Retransmission of MsgB in two-step random access procedure
Chunhai Yao, Beijing (CN); Clive E. Rodgers, Palo Alto, CA (US); Dawei Zhang, Saratoga, CA (US); Fangli Xu, Beijing (CN); Haijing Hu, Beijing (CN); Haitong Sun, Irvine, CA (US); Wei Zeng, San Diego, CA (US); Yuqin Chen, Shenzhen (CN); Yushu Zhang, Beijing (CN); and Zhibin Wu, Los Altos, CA (US)
Assigned to Apple Inc., Cupertino, CA (US)
Appl. No. 17/40,437
Filed by Apple Inc., Cupertino, CA (US)
PCT Filed Sep. 29, 2019, PCT No. PCT/CN2019/108881
§ 371(c)(1), (2) Date Sep. 22, 2020,
PCT Pub. No. WO2021/056511, PCT Pub. Date Apr. 1, 2021.
Prior Publication US 2022/0279583 A1, Sep. 1, 2022
Int. Cl. H04W 74/08 (2009.01); H04W 72/1268 (2023.01); H04W 74/00 (2009.01)
CPC H04W 74/0833 (2013.01) [H04W 72/1268 (2013.01); H04W 74/006 (2013.01)] 20 Claims
OG exemplary drawing
 
10. An apparatus, comprising:
at least one processor configured to cause a user equipment (UE):
receive a configuration message from a base station, wherein the configuration message indicates a time duration of a window for monitoring a downlink message; and
after failing to receive an initial transmission of the downlink message from the base station, monitor for one or more retransmissions of the downlink message, wherein the downlink message is part of a two-step random access procedure, wherein said monitoring includes attempting to decode control information in a first of the one or more retransmissions within the window using a message B (MSGB) Radio Network Temporary Identity (RNTI) that was previously used to attempt decoding of control information in the initial transmission, wherein the MSGB-RNTI is based on location parameters of a physical uplink resource that was used by the UE device to transmit a random access preamble.