US 12,262,263 B2
MCG failure recovery enhancement in DC mode
Fangli Xu, Beijing (CN); Dawei Zhang, Cupertino, CA (US); Haijing Hu, Cupertino, CA (US); Naveen Kumar R Palle Venkata, Cupertino, CA (US); Sethuraman Gurumoorthy, Cupertino, CA (US); Srirang A Lovlekar, Cupertino, CA (US); Yuqin Chen, Cupertino, CA (US); and Zhibin Wu, Cupertino, CA (US)
Assigned to Apple Inc., Cupertino, CA (US)
Appl. No. 17/598,093
Filed by Apple Inc., Cupertino, CA (US)
PCT Filed Jan. 28, 2021, PCT No. PCT/CN2021/074091
§ 371(c)(1), (2) Date Aug. 4, 2022,
PCT Pub. No. WO2022/160159, PCT Pub. Date Aug. 4, 2022.
Prior Publication US 2023/0362751 A1, Nov. 9, 2023
Int. Cl. H04W 36/00 (2009.01)
CPC H04W 36/00698 (2023.05) [H04W 36/00695 (2023.05); H04W 36/0079 (2018.08)] 20 Claims
OG exemplary drawing
 
1. A method of recovering from radio link failures by a wireless user equipment (UE) of a multi-radio access technology dual connectivity (MR-DC) system in a communication network, the method comprising:
determining, by the UE, a failure condition in a master cell group (MCG) radio link between the UE and a master base station of the MCG of the MR-DC system based on monitoring of the MCG radio link;
determining, by the UE, that a secondary cell group (SCG) radio link between the UE and a secondary base station of the SCG of the MR-DC system is in one of a deactivated or a conditionally unavailable state;
changing, by the UE, the SCG radio link to one of an activated or a conditionally available state;
transmitting, by the UE to the secondary base station over the SCG radio link, information on the failure condition in the MCG radio link; and
receiving, by the UE from the secondary base station over the SCG radio link, a signaling command to reconfigure the SCG radio link or to recover the MCG radio link.