A ROBUST RADIO LINK MONITORING METHOD

WIPO Patent Application WO/2022/266788

A1

Aspects are provided which improve RLM by allowing a UE to apply a longer monitoring window for out-of-sync determinations before the UE triggers an RLM timer for in-sync determinations. The UE first obtains a reference signal from a base station. The UE then determines multiple groups of consecutive out-of-sync indications in response to the reference signal. For example, the UE may perform looped out-of-sync monitoring, multi-cell or carrier monitoring, or a combination of such monitoring to determine the multiple groups of out-of-sync indications. Afterwards, the UE triggers the RLM timer in response to determining the multiple groups of consecutive out-of-sync indications. As a result, the UE may perform additional out-of-sync monitoring during RLM before proceeding with in-sync monitoring, thus allowing the UE to account for rapid BLER changes (ping-pong effects) that may occur in HAPS systems due to tropospheric turbulence and enabling more accurate RLM determinations and minimal RLF detections.

CAO YIQING (US)
GAAL PETER (US)
MA LIANGPING (US)
WANG XIAO FENG (US)
RICO ALVARINO ALBERTO (US)
HAN BIN (US)
WANG TING (US)
LI YAN (US)
DU ZHIMIN (US)

PCT/CN2021/101168

December 29, 2022

June 21, 2021

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QUALCOMM INC (US)
CAO YIQING (CN)
GAAL PETER (US)
MA LIANGPING (US)
WANG XIAO FENG (US)
RICO ALVARINO ALBERTO (US)
HAN BIN (CN)
WANG TING (CN)
LI YAN (CN)
DU ZHIMIN (CN)

H04W24/10; H04W36/08

US20210014717A1	2021-01-14
CN109644361A	2019-04-16
CN111066344A	2020-04-24
US20210006998A1	2021-01-07
US20210112431A1	2021-04-15
US20200374960A1	2020-11-26

NTD PATENT & TRADEMARK AGENCY LTD. (CN)

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