US 12,284,710 B2
Fast failure recovery with master node
Chih-Hsiang Wu, Taoyuan (TW); and Teming Chen, Taoyuan (TW)
Assigned to GOOGLE LLC, Mountain View, CA (US)
Appl. No. 17/268,178
Filed by GOOGLE LLC, Mountain View, CA (US)
PCT Filed Oct. 13, 2020, PCT No. PCT/US2020/055393
§ 371(c)(1), (2) Date Feb. 12, 2021,
PCT Pub. No. WO2021/076502, PCT Pub. Date Apr. 22, 2021.
Claims priority of provisional application 62/915,013, filed on Oct. 14, 2019.
Prior Publication US 2022/0304092 A1, Sep. 22, 2022
Int. Cl. H04W 76/19 (2018.01); H04W 36/00 (2009.01); H04W 76/15 (2018.01); H04W 76/30 (2018.01)
CPC H04W 76/19 (2018.02) [H04W 36/0069 (2018.08); H04W 76/15 (2018.02); H04W 76/30 (2018.02)] 11 Claims
OG exemplary drawing
 
1. A method for failure recovery in a user equipment (UE) communicating in dual connectivity (DC) with a master node (MN) and a secondary node (SN), the method comprising:
receiving, by the UE, candidate secondary node (C-SN) connection information including a configuration related to a C-SN and at least one condition for connecting to the C-SN;
determining, by the UE, that a radio connection between the UE and the MN has failed;
transmitting to the SN, by the UE, MCG failure indication of the failed radio connection to initiate a fast master cell group (MCG) recovery procedure;
suspending a procedure for connecting to the C-SN; and
receiving, from the SN, an MCG failure recovery message indicating that the MCG fast recovery procedure has completed successfully; and
releasing the C-SN connection information in response to determining that the MCG fast recovery procedure has completed successfully.