US Patent No. 10,993,278

METHOD AND APPARATUS FOR RECOVERING FROM RADIO DOWNLINK FAILURE


Patent No. 10,993,278
Issue Date April 27, 2021
Title Method And Apparatus For Recovering From Radio Downlink Failure
Inventorship Haifeng Yu, Beijing (CN)
Xin Xiong, Beijing (CN)
Feng Yu, Beijing (CN)
Assignee Huawei Technologies Co., Ltd., Shenzhen (CN)

Claim of US Patent No. 10,993,278

1. A method comprising:monitoring, by a user equipment a first radio link to determine when a radio downlink failure occurs on the first radio link, wherein the first radio link is connected to a radio network;
when the radio downlink failure is detected on the first radio link, starting, by the user equipment, a physical-layer-monitored automatic-recovery process for the first radio link in parallel with starting a Radio Link Control Radio Resource Control (RRC) connection re-setup process to set up a second radio link;
performing, after the starting the physical-layer-monitored automatic-recovery process, and after starting the Radio Link Control RRC connection re-setup process to set up the second radio link:
determining a target preset time length; and
entering an idle mode when the first radio link is still in a radio downlink failure state after the target preset time length expires, wherein the idle mode indicates that recovery from the radio downlink failure failed; and
recovering from the radio downlink failure through the physical-layer-monitored automatic-recovery process or the Radio Link Control RRC connection re-setup process.