US 12,477,608 B2
Synchronization of RRC status of a multi-SIM user equipment with a base station
Srirang A. Lovlekar, Fremont, CA (US); Adesh Kumar, San Jose, CA (US); Birgit Breining, Munich (DE); Dawei Zhang, Saratoga, CA (US); Fangli Xu, Beijing (CN); Haijing Hu, Los Gatos, CA (US); Longda Xing, San Jose, CA (US); Naveen Kumar R. Palle Venkata, San Diego, CA (US); Sethuraman Gurumoorthy, San Ramon, CA (US); Yuqin Chen, Beijing (CN); and Zhibin Wu, Los Altos, CA (US)
Assigned to Apple Inc., Cupertino, CA (US)
Appl. No. 17/593,722
Filed by Apple Inc., Cupertino, CA (US)
PCT Filed Oct. 22, 2020, PCT No. PCT/CN2020/122971
§ 371(c)(1), (2) Date Sep. 23, 2021,
PCT Pub. No. WO2022/082650, PCT Pub. Date Apr. 28, 2022.
Prior Publication US 2022/0312531 A1, Sep. 29, 2022
Int. Cl. H04W 72/04 (2023.01); H04W 8/18 (2009.01); H04W 76/19 (2018.01); H04W 76/20 (2018.01); H04W 76/30 (2018.01)
CPC H04W 76/19 (2018.02) [H04W 8/183 (2013.01); H04W 76/20 (2018.02); H04W 76/30 (2018.02)] 17 Claims
OG exemplary drawing
 
1. A user equipment (UE), comprising:
a multi universal subscriber identity module (MUSIM) array having a first SIM and a second SIM;
a transceiver configured to communicate with one or more networks; and
a processor communicatively coupled to the transceiver and the MUSIM and configured to perform operations comprising:
registering to a first network for the first SIM;
registering to a second network for the second SIM;
prior to the UE conducting a high priority activity related to the second SIM, sending, to the first network via a connection associated with the first SIM, a first message related to the second SIM, wherein the first message comprises a UE assistance information message including a preferred RRC state set to Inactive;
receiving, from the first network, a second message indicating that the first network will retain a connection context for the connection associated with the first SIM in an RRC Inactive state; and
determining the connection context of the first network for the connection associated with the first SIM.