US 11,956,683 B2
Robust beam failure recovery using a non-serving cell
Ahmad Awada, Munich (DE); Timo Koskela, Oulu (FI); Jorma Kaikkonen, Oulu (FI); and Ingo Viering, Munich (DE)
Assigned to NOKIA TECHNOLOGIES OY, Espoo (FI)
Appl. No. 17/602,938
Filed by Nokia Technologies Oy, Espoo (FI)
PCT Filed Apr. 29, 2020, PCT No. PCT/IB2020/054050
§ 371(c)(1), (2) Date Oct. 11, 2021,
PCT Pub. No. WO2020/222144, PCT Pub. Date Nov. 5, 2020.
Claims priority of provisional application 62/842,177, filed on May 2, 2019.
Prior Publication US 2022/0174567 A1, Jun. 2, 2022
Int. Cl. H04W 36/08 (2009.01); H04B 7/06 (2006.01); H04W 36/00 (2009.01); H04W 36/30 (2009.01); H04W 36/32 (2009.01); H04W 76/19 (2018.01)
CPC H04W 36/08 (2013.01) [H04B 7/0695 (2013.01); H04W 36/0058 (2018.08); H04W 36/00837 (2018.08); H04W 36/305 (2018.08); H04W 36/32 (2013.01); H04W 76/19 (2018.02)] 6 Claims
OG exemplary drawing
 
1. A method, comprising:
determining, by a user equipment and in response to a beam failure being detected for a serving cell that serves the user equipment, whether a timer is running;
performing one of the following by the user equipment:
in response to the timer running, a beam failure recovery procedure with a target non-serving cell; or
in response to the timer not running, a beam failure recovery procedure with the serving cell, and
prior to the determining whether the timer is running,
determining by the user equipment whether an entering condition of a measurement event is fulfilled for a time-to-trigger or a second timer for the time-to-trigger has expired, wherein the measurement event is configured at least for the user equipment to measure one or more non-serving cells including the target non-serving cell; and
starting the running of the timer in response to a determination by the user equipment the entering condition of the measurement event is fulfilled for the time-to-trigger or the second timer for the time-to-trigger has expired.