US 12,438,590 B2
Systems and methods for beam failure recovery enhancement
Yushu Zhang, Beijing (CN); Chunxuan Ye, San Diego, CA (US); Dawei Zhang, Saratoga, CA (US); Haitong Sun, Cupertino, CA (US); Hong He, San Jose, CA (US); Huaning Niu, San Jose, CA (US); Seyed Ali Akbar Fakoorian, San Diego, CA (US); Sigen Ye, San Diego, CA (US); and Wei Zeng, Saratoga, CA (US)
Assigned to APPLE INC., Cupertino, CA (US)
Filed by APPLE INC., Cupertino, CA (US)
Filed on Oct. 26, 2023, as Appl. No. 18/494,962.
Application 18/494,962 is a continuation of application No. 17/593,294, granted, now 12,166,559, previously published as PCT/CN2021/098626, filed on Jun. 7, 2021.
Prior Publication US 2024/0056160 A1, Feb. 15, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04B 7/06 (2006.01); H04B 17/318 (2015.01); H04L 5/00 (2006.01); H04W 76/18 (2018.01)
CPC H04B 7/06964 (2023.05) [H04B 17/328 (2023.05); H04L 5/0048 (2013.01); H04W 76/18 (2018.02); H04L 5/001 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method of a base station, comprising:
sending, to a user equipment (UE), radio resource control (RRC) signaling indicating a first threshold to use at the UE for UL candidate beam detection (CBD) and a second threshold to use for DL CBD;
receiving, from the UE, one of a first beam failure recovery request (BFRQ) identifying a UL candidate beam and a second BFRQ identifying a DL candidate beam;
sending, to the UE, a beam failure recovery response (BFRR); and
using the one of the UL candidate beam and the DL candidate beam from the one of the first BFRQ and the second BFRQ to communicate with the UE;
wherein the RRC signaling further indicates a first contention free physical random access channel (CF-PRACH) resource used by the base station to receive the first BFRQ and a second CF-PRACH resource used by the base station to receive the second BFRQ.