US 12,267,702 B2
Method for beam failure recovery based on unified TCI framework
Yushu Zhang, Beijing (CN); Andre Janssen, Munich (DE); Haitong Sun, Cupertino, CA (US); Wei Zeng, Saratoga, CA (US); Dawei Zhang, Saratoga, CA (US); Yeong-Sun Hwang, Germering (DE); and Franz J. Eder, Neubiberg (DE)
Assigned to Apple Inc., Cupertino, CA (US)
Appl. No. 17/438,139
Filed by Apple Inc., Cupertino, CA (US)
PCT Filed Mar. 31, 2021, PCT No. PCT/CN2021/084359
§ 371(c)(1), (2) Date Sep. 10, 2021,
PCT Pub. No. WO2022/205053, PCT Pub. Date Oct. 6, 2022.
Prior Publication US 2022/0322113 A1, Oct. 6, 2022
Int. Cl. H04W 24/04 (2009.01); H04L 5/00 (2006.01); H04W 24/08 (2009.01)
CPC H04W 24/04 (2013.01) [H04L 5/001 (2013.01); H04W 24/08 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A user equipment device (UE), comprising:
at least one antenna;
at least one radio, wherein the at least one radio is configured to perform cellular communication using at least one radio access technology (RAT);
one or more processors coupled to the at least one radio, wherein the one or more processors and the at least one radio are configured to perform communications;
wherein the one or more processors are configured to cause the UE to:
receive, from a base station, a configuration for a beam failure recovery (BFR) procedure for a component carrier (CC) group (CCG), wherein the CCG includes at least two CCs;
periodically receive, from the base station, at least a first beam failure detection (BFD) reference signal (RS) and a first candidate beam detection (CBD) RS in a first CC based on the configuration;
detect, based on the first BFD RS, a beam failure in at least the first CC;
send, to the base station, a beam failure recovery (BFR) request (BFRQ) via a medium access control (MAC) control element (CE), wherein the BFRQ includes a candidate beam selected based on at least the first CBD RS;
receive, from the base station, a BFR response; and
apply the candidate beam to a subset of channels or all channels corresponding to a previously indicated unified Transmission Configuration Indicator (TCI) State for all CCs in the CCG.