US 11,871,396 B2
Methods and apparatuses for handling beam failure
Stephen Grant, Pleasanton, CA (US); Mattias Frenne, Uppsala (SE); Andreas Nilsson, Gothenburg (SE); and Claes Tidestav, Bålsta (SE)
Assigned to TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Filed on May 26, 2022, as Appl. No. 17/825,385.
Application 17/825,385 is a continuation of application No. 16/860,617, filed on Apr. 28, 2020, granted, now 11,350,415.
Application 16/860,617 is a continuation of application No. 16/399,491, filed on Apr. 30, 2019, granted, now 11,115,984, issued on Sep. 7, 2021.
Application 16/399,491 is a continuation of application No. PCT/IB2017/056826, filed on Nov. 2, 2017.
Claims priority of provisional application 62/417,607, filed on Nov. 4, 2016.
Prior Publication US 2022/0369304 A1, Nov. 17, 2022
Int. Cl. H04W 72/044 (2023.01); H04B 7/022 (2017.01); H04B 7/06 (2006.01); H04W 24/08 (2009.01); H04B 7/08 (2006.01); H04B 7/0404 (2017.01)
CPC H04W 72/046 (2013.01) [H04B 7/022 (2013.01); H04B 7/0617 (2013.01); H04B 7/0695 (2013.01); H04B 7/086 (2013.01); H04B 7/088 (2013.01); H04W 24/08 (2013.01); H04B 7/0404 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A user equipment (UE), the UE comprising:
a transmitter;
a receiver;
a memory; and
a data processing system comprising one or more processors, wherein the UE is configured to:
based on measurements of reference signals that were transmitted using a first transmit (TX) beam, detect whether a beam failure has occurred; and
as a result of detecting that the beam failure has occurred, transmit at least a first beam failure message indicating that the UE has detected that the beam failure has occurred, wherein
the UE is configured to determine whether the beam failure has occurred by performing a process that comprises:
determining whether a determined radio link quality value satisfies a condition; and
as a result of determining that the determined radio link quality value satisfies a condition, calculating C_new=C_old+x, wherein C_old is a counter value and x is a predetermined constant;
comparing C_new to a threshold; and
based on the comparing, determining whether the beam failure has occurred.