US 12,408,048 B2
Method for a transmission/reception point (TRP) specific beam failure recovery (BFR) for a single downlink control information (DCI) mode
Haitong Sun, Cupertino, CA (US); Wei Zeng, Saratoga, CA (US); Huaning Niu, San Jose, CA (US); Hong He, San Jose, CA (US); Chunxuan Ye, San Diego, CA (US); Seyed Ali Akbar Fakoorian, San Diego, CA (US); Oghenekome Oteri, San Diego, CA (US); Dawei Zhang, Saratoga, CA (US); and Yushu Zhang, Beijing (CN)
Assigned to APPLE INC., Cupertino, CA (US)
Appl. No. 17/442,059
Filed by Apple Inc., Cupertino, CA (US)
PCT Filed May 11, 2021, PCT No. PCT/CN2021/093124
§ 371(c)(1), (2) Date Nov. 17, 2022,
PCT Pub. No. WO2022/236708, PCT Pub. Date Nov. 17, 2022.
Prior Publication US 2024/0073707 A1, Feb. 29, 2024
Int. Cl. H04W 24/04 (2009.01); H04W 76/34 (2018.01); H04W 76/38 (2018.01); H04W 88/06 (2009.01)
CPC H04W 24/04 (2013.01) [H04W 76/34 (2018.02); H04W 76/38 (2018.02); H04W 88/06 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A user equipment (UE), comprising:
a transceiver configured to enable wireless communication with a first transmission/reception point (TRP) and a second TRP; and
a processor communicatively coupled to the transceiver and configured to:
perform a first beam failure detection (BFD) procedure for the first TRP and a second BFD procedure for the second TRP;
perform a first beam failure recovery (BFR) procedure for the first TRP responsive to a result of the first BFD procedure and a second BFR procedure for the second TRP responsive to a result of the second BFD procedure;
receive, using the transceiver, a configuration message indicating a switch for the UE from a multi-TRP mode to a single-TRP mode;
receive, using the transceiver, a BFD configuration and a BFR configuration;
switch to the single-TRP mode based on the configuration message by refraining from communicating user data with the first TRP;
update the first BFD procedure based on the BFD configuration by:
pausing the first BFD procedure when a first time period expires, wherein the first time period begins after switching to the single-TRP mode, wherein the BFD configuration indicates a length of the first time period; and
resetting a BFD counter when a second time period expires, wherein the second time period begins after pausing the first BFD procedure, wherein the BFD configuration indicates a length of the second time period;
update the first BFR procedure based on the BFR configuration by:
pausing the first BFR procedure when a third time period expires, wherein the third time period begins after switching to the single-TRP mode, wherein the BFR configuration indicates a length of the third time period;
perform the updated first BFD procedure for the first TRP;
perform the updated first BFR procedure for the first TRP responsive to a result of the updated first BFD procedure;
update the second BFD procedure based on the BFD configuration and update the second BFR procedure based on the BFR configuration;
perform the updated second BFD procedure for the second TRP; and
perform the updated second BFR procedure for the second TRP responsive to a result of the updated second BFD procedure.