US 12,010,730 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, Los Gatos, CA (US); Haitong Sun, Saratoga, CA (US); Wei Zeng, Saratoga, CA (US); Yuqin Chen, Shenzhen (CN); Yushu Zhang, Beijing (CN); and Zhibin Wu, Los Altos, CA (US)
Assigned to Apple Inc., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Jun. 14, 2023, as Appl. No. 18/334,933.
Application 18/334,933 is a continuation of application No. 17/040,437, granted, now 11,723,073, previously published as PCT/CN2019/108881, filed on Sep. 29, 2019.
Prior Publication US 2023/0328802 A1, Oct. 12, 2023
Int. Cl. H04W 74/0833 (2024.01); 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
 
9. An apparatus, comprising:
at least one processor configured to cause a user equipment (UE) to:
receive a configuration message from a base station, wherein the configuration message indicates a time duration of a window for monitoring a physical downlink control channel (PDCCH); and
monitor the PDCCH for one or more transmissions of a downlink message, wherein the one or more transmissions of the downlink message are part of a two-step random access procedure;
decode downlink control information, DCI, in a first of the one or more transmissions of the downlink message within the window using a message B (MSGB) Radio Network Temporary Identity (RNTI), wherein the MSGB-RNTI is based on location parameters of a physical uplink resource that was used by the UE to transmit a random access preamble of the two-step random access procedure; and
determine, based on a field in the decoded DCI that resolves DCI transmissions relating to random access preamble transmissions in different radio frames using a same MSB-RNTI, whether to accept or reject the decoded DCI.