US 12,088,387 B2
Secondary cell beam failure recovery operation in new radio (NR)
Guotong Wang, Beijing (CN); Yushu Zhang, Beijing (CN); Gang Xiong, Portland, OR (US); and Alexei Davydov, Nizhny Novgorod (RU)
Assigned to Apple Inc., Cupertino, CA (US)
Appl. No. 17/428,488
Filed by Apple Inc., Cupertino, CA (US)
PCT Filed Feb. 14, 2020, PCT No. PCT/US2020/018358
§ 371(c)(1), (2) Date Aug. 4, 2021,
PCT Pub. No. WO2020/168238, PCT Pub. Date Aug. 20, 2020.
Claims priority of provisional application 62/805,864, filed on Feb. 14, 2019.
Prior Publication US 2022/0116094 A1, Apr. 14, 2022
Int. Cl. H04B 7/06 (2006.01); H04W 16/28 (2009.01)
CPC H04B 7/0695 (2013.01) [H04W 16/28 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A user equipment (UE), comprising:
radio front end circuitry; and
processor circuitry, coupled the radio front end circuitry, configured to:
detect a beam failure on a secondary cell (SCell);
generate a beam failure recovery request (BFRQ) for the SCell, wherein the BFRQ comprises a component carrier identifier for the SCell and a first plurality of candidate beam identifiers for a new beam to be used for recovery;
transmit, using the radio front end circuitry, the BFRQ for the SCell over a primary cell (PCell) to a base station;
receive, from the base station, a response for the BFRQ for the SCell over the SCell or the PCell, wherein the response includes a second plurality of candidate beams; and
select one beam from the second plurality of candidate beams and use as the new beam to receive downlink transmission over the SCell.