US 11,659,597 B2
User equipment and method for two-step random access procedure
Chia-Hung Wei, Taipei (TW); and Hai-Han Wang, Taipei (TW)
Assigned to FG Innovation Company Limited, Tuen Mun (HK)
Filed by FG Innovation Company Limited, Tuen Mun (HK)
Filed on Nov. 30, 2020, as Appl. No. 17/107,231.
Claims priority of provisional application 62/941,975, filed on Nov. 29, 2019.
Prior Publication US 2021/0168874 A1, Jun. 3, 2021
Int. Cl. H04W 74/08 (2009.01); H04W 72/23 (2023.01)
CPC H04W 74/0833 (2013.01) [H04W 72/23 (2023.01)] 12 Claims
OG exemplary drawing
 
1. A user equipment (UE) for a 2-step random access (RA) procedure, the UE comprising:
at least one processor; and
at least one memory coupled to the at least one processor and storing computer-executable instructions that, when executed by the at least one processor, cause the UE to:
perform a first Listen-Before-Talk (LBT) procedure on a Physical Random Access Channel (PRACH) occasion for transmitting a preamble of a message A (MSGA);
perform a second LBT procedure on a Physical Uplink Shared Channel (PUSCH) occasion for transmitting a payload of the MSGA, the payload including a Medium Access Control (MAC) Control Element (CE) including a Cell-Radio Network Temporary Identifier (C-RNTI);
monitor Physical Downlink Control Channel (PDCCH) candidates for a first random access response (RAR) identified by a message B (MSGB)-Radio Network Temporary Identifier (RNTI) in a MSGB window; and
monitor the PDCCH candidates for a second RAR identified by the C-RNTI in the MSGB window in a case that the second LBT procedure is successful.