US 11,924,025 B2
Method for performing beam failure detection in wireless communication system and apparatus therefor
Jiwon Kang, Seoul (KR); Eunjong Lee, Seoul (KR); and Heejeong Cho, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Appl. No. 17/266,959
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed Aug. 9, 2019, PCT No. PCT/KR2019/010076
§ 371(c)(1), (2) Date Feb. 8, 2021,
PCT Pub. No. WO2020/032685, PCT Pub. Date Feb. 13, 2020.
Claims priority of provisional application 62/716,937, filed on Aug. 9, 2018.
Prior Publication US 2021/0314218 A1, Oct. 7, 2021
Int. Cl. H04L 12/26 (2006.01); H04L 5/00 (2006.01); H04L 41/0677 (2022.01); H04W 24/08 (2009.01); H04W 72/23 (2023.01)
CPC H04L 41/0677 (2013.01) [H04L 5/0048 (2013.01); H04W 24/08 (2013.01); H04W 72/23 (2023.01)] 12 Claims
OG exemplary drawing
 
1. A method of performing, by a user equipment (UE), beam failure detection in a wireless communication system, the method comprising:
receiving a reference signal (RS) from a base station;
determining whether a beam has failed based on a block error rate (BLER) calculated by performing measurement on the reference signal; and
transmitting, to the base station, a result of the determination of whether the beam has failed,
wherein determining whether the beam has failed includes:
distinguishing between i) a case where the base station does not transmit the reference signal and ii) a case where quality of the reference signal transmitted by the base station does not satisfy a specific threshold range, and
determining that the beam has failed only in the case ii),
wherein a first threshold for determining the case i) where the base station does not transmit the reference signal and a second threshold for determining the case ii) where the quality of the reference signal transmitted by the base station are separately set.