US 11,855,735 B2
Technologies for beam failure recovery
Yushu Zhang, Beijing (CN); Chunxuan Ye, San Diego, CA (US); Weidong Yang, San Diego, CA (US); Sigen Ye, Whitehouse Station, NJ (US); Oghenekome Oteri, San Diego, CA (US); Jie Cui, San Jose, CA (US); Haitong Sun, Cupertino, CA (US); Wei Zeng, Saratoga, CA (US); Hong He, San Jose, CA (US); Dawei Zhang, Saratoga, CA (US); Chunhai Yao, Beijing (CN); and Huaning Niu, San Diego, CA (US)
Assigned to Apple Inc., Cupertino, CA (US)
Appl. No. 17/440,181
Filed by Apple Inc., Cupertino, CA (US)
PCT Filed Oct. 14, 2020, PCT No. PCT/CN2020/120903
§ 371(c)(1), (2) Date Sep. 16, 2021,
PCT Pub. No. WO2022/077269, PCT Pub. Date Apr. 21, 2022.
Prior Publication US 2022/0352958 A1, Nov. 3, 2022
Int. Cl. H04B 7/06 (2006.01); H04W 74/08 (2009.01); H04W 76/19 (2018.01); H04W 80/02 (2009.01); H04W 36/06 (2009.01); H04W 36/30 (2009.01); H04W 84/06 (2009.01)
CPC H04B 7/0695 (2013.01) [H04W 74/0841 (2013.01); H04W 76/19 (2018.02); H04W 80/02 (2013.01)] 20 Claims
OG exemplary drawing
 
1. One or more non-transitory computer-readable media having instructions that, when executed by one or more processors, cause a user equipment (UE) to:
declare a beam failure with respect to a first beam in a first bandwidth part of a cell;
switch to a second bandwidth part of the cell based on the beam failure;
determine that a candidate beam detection (CBD) reference signal (RS) of a second beam in the second bandwidth part is not detected within a time window that is predefined or configured by radio resource control signaling; and
trigger, based on determination that the CBD RS is not detected within the time window, a contention-based random access (CBRA) procedure corresponding to a synchronization signal block within an initial bandwidth part of the cell.