US 12,349,199 B2
Methods and apparatus for time-domain PRACH resource determination in wireless communication
Hong He, Cupertino, CA (US); Chunxuan Ye, Cupertino, CA (US); Huaning Niu, Cupertino, CA (US); Jie Cui, Cupertino, CA (US); Dawei Zhang, Cupertino, CA (US); Haitong Sun, Cupertino, CA (US); Oghenekome Oteri, Cupertino, CA (US); Sigen Ye, Cupertino, CA (US); Wei Zeng, Cupertino, CA (US); Weidong Yang, Cupertino, CA (US); and Yushu Zhang, Beijing (CN)
Assigned to Apple Inc., Cupertino, CA (US)
Appl. No. 17/598,038
Filed by Apple Inc., Cupertino, CA (US)
PCT Filed Jan. 14, 2021, PCT No. PCT/CN2021/071946
§ 371(c)(1), (2) Date Jul. 21, 2022,
PCT Pub. No. WO2022/151288, PCT Pub. Date Jul. 21, 2022.
Prior Publication US 2023/0363003 A1, Nov. 9, 2023
Int. Cl. H04W 74/0833 (2024.01)
CPC H04W 74/0833 (2013.01) 20 Claims
OG exemplary drawing
 
1. A baseband processor of a wireless user equipment (UE) configured to perform operations comprising:
receiving a New Radio (NR) Physical Random Access Channel (PRACH) configuration comprising an indication of a time-domain PRACH resource type to determine when the UE is allowed to transmit a PRACH preamble and a type of preamble format;
determining a PRACH resource based on the received NR PRACH configuration to transmit the PRACH preamble, wherein the PRACH resource includes RACH resource occasions (ROs) with gaps in between;
initiating a PRACH procedure by transmitting the PRACH preamble on a RO based on the determined PRACH resource to a base station (BS); and
performing Listen-Before-Talk (LBT) operations during a gap before the RO to transmit the PRACH preamble prior to initiating the PRACH procedure.