US 12,452,819 B2
Connection suspension for multiple SIMs
Genadi Velev, Darmstadt (DE); Apostolis Salkintzis, Athens (GR); and Dimitrios Karampatsis, Ruislip (GB)
Assigned to Lenovo (Singapore) Pte. Ltd., New Tech Park (SG)
Appl. No. 17/279,075
Filed by Lenovo (Singapore) PTE. LTD., New Tech Park (SG)
PCT Filed Sep. 6, 2019, PCT No. PCT/EP2019/073833
§ 371(c)(1), (2) Date Mar. 23, 2021,
PCT Pub. No. WO2021/043417, PCT Pub. Date Mar. 11, 2021.
Prior Publication US 2022/0053448 A1, Feb. 17, 2022
Int. Cl. H04W 60/00 (2009.01); H04W 8/18 (2009.01); H04W 76/38 (2018.01); H04W 88/06 (2009.01)
CPC H04W 60/005 (2013.01) [H04W 8/183 (2013.01); H04W 76/38 (2018.02); H04W 88/06 (2013.01)] 21 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a first subscriber identity module (“SIM”) registered with a first mobile communication network;
a second SIM registered with a second mobile communication network;
a processor; and
a memory coupled to the processor, the processor configured to:
communicate in a connected state with the second mobile communication network;
detects activity associated with the first SIM; and
transmit a connection release request message from the connected state for the second SIM, in response to the detected activity associated with the first SIM, by transmitting one of a radio resource control (“RRC”) layer request message indicating a connection release and a non-access-stratum (“NAS”) layer request message indicating the connection release;
initiate a state transition timer based on a transmission of the connection release request message; and
transition to an idle state in response to expiry of the state transition timer without a reception of a response message from the second mobile communication network.