US 12,231,204 B2
Cross-cell beam failure recovery
Wei Zeng, San Diego, CA (US); Dawei Zhang, Saratoga, CA (US); Haitong Sun, Irvine, CA (US); Hong He, Cupertino, CA (US); Oghenekome Oteri, San Diego, CA (US); Weidong Yang, San Diego, CA (US); Sigen Ye, Whitehouse Station, NJ (US); Chunxuan Ye, San Diego, CA (US); Chunhai Yao, Beijing (CN); Jie Cui, San Jose, CA (US); Yang Tang, Cupertino, CA (US); and Yushu Zhang, Beijing (CN)
Assigned to Apple Inc., Cupertino, CA (US)
Appl. No. 17/442,108
Filed by Apple Inc., Cupertino, CA (US)
PCT Filed Aug. 4, 2020, PCT No. PCT/CN2020/106911
§ 371(c)(1), (2) Date Sep. 22, 2021,
PCT Pub. No. WO2022/027254, PCT Pub. Date Feb. 10, 2022.
Prior Publication US 2022/0302986 A1, Sep. 22, 2022
Int. Cl. H04B 7/06 (2006.01); H04W 24/08 (2009.01); H04W 56/00 (2009.01); H04W 74/0833 (2024.01); H04W 76/19 (2018.01); H04W 36/08 (2009.01)
CPC H04B 7/0695 (2013.01) [H04W 24/08 (2013.01); H04W 56/001 (2013.01); H04W 74/0841 (2013.01); H04W 76/19 (2018.02); H04W 36/085 (2023.05)] 16 Claims
OG exemplary drawing
 
1. A method, comprising:
determining, by a user equipment (UE), one or more beam failures by monitoring one or more reference signals transmitted by one or more base stations (BS), wherein the UE is connected to the one or more base stations;
performing, by the UE, candidate beam detection by monitoring at least one candidate reference signal that is transmitted by a first candidate base station, wherein the UE is not connected to the first candidate base station;
selecting, by the UE, the first candidate base station based on the candidate beam detection, wherein the selecting the first candidate base station comprises determining whether a signal strength of the at least one candidate reference signal associated with the first candidate base station is above a success threshold, wherein the success threshold is different for each of a plurality of candidate base stations, and wherein the plurality of candidate base stations includes the first candidate base station; and
transmitting, by the UE, a beam failure recovery request (BFRQ) message to the first candidate base station, based on the selection of the first candidate base station with respect to the candidate beam detection.