US 12,193,062 B2
Reducing likelihood of RACH transmission blockages for NR-U operation
Hong He, Cupertino, CA (US); Chunhai Yao, Beijing (CN); Chunxuan Ye, San Diego, CA (US); Dawei Zhang, Cupertino, CA (US); Haitong Sun, Cupertino, CA (US); Jie Cui, Cupertino, CA (US); Oghenekome Oteri, San Diego, CA (US); Sigen Ye, Cupertino, CA (US); Wei Zeng, Cupertino, CA (US); Weidong Yang, San Diego, CA (US); Yang Tang, Cupertino, CA (US); and Yushu Zhang, Beijing (CN)
Assigned to APPLE INC., Cupertino, CA (US)
Appl. No. 17/593,523
Filed by APPLE INC., Cupertino, CA (US)
PCT Filed May 15, 2020, PCT No. PCT/CN2020/090526
§ 371(c)(1), (2) Date Sep. 20, 2021,
PCT Pub. No. WO2021/227016, PCT Pub. Date Nov. 18, 2021.
Prior Publication US 2022/0312490 A1, Sep. 29, 2022
Int. Cl. H04W 74/08 (2024.01); H04L 1/00 (2006.01); H04W 74/0808 (2024.01); H04W 74/0833 (2024.01)
CPC H04W 74/0833 (2013.01) [H04L 1/0068 (2013.01); H04W 74/0808 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method, performed by a user equipment (UE), of reducing likelihood of Random Access Channel (RACH) transmission blockages and thereby facilitate an initial access procedure for new radio (NR) unlicensed spectrum (NR-U) operation in a fifth generation (5G) wireless communication system including an NR node, the method comprising:
receiving from the NR node a parameter indicating that, from among a set of consecutive RACH Occasions (ROs), a gap is available for performing a listen-before-talk (LBT) procedure before commencing a RACH transmission, in which the parameter includes a bitmask having a set of logical values corresponding to the set of consecutive ROs such that each logical value indicates whether a corresponding RO is valid or invalid for the RACH transmission; and
processing the parameter to determine a temporal location of the gap.