US 12,127,150 B2
Mobile terminating information delivery for mulitple USIM UE
Qian Chen, Mölndal (SE); Christofer Lindheimer, Vadstena (SE); Stefan Rommer, Västra Frölunda (SE); Paul Schliwa-Bertling, Ljungsbro (SE); Magnus Stattin, Upplands Väsby (SE); and Alessio Terzani, Stockholm (SE)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Appl. No. 17/642,744
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Oct. 6, 2020, PCT No. PCT/EP2020/077982
§ 371(c)(1), (2) Date Mar. 14, 2022,
PCT Pub. No. WO2021/069431, PCT Pub. Date Apr. 15, 2021.
Claims priority of provisional application 62/913,912, filed on Oct. 11, 2019.
Prior Publication US 2022/0330195 A1, Oct. 13, 2022
Int. Cl. H04W 60/00 (2009.01); H04W 76/15 (2018.01); H04W 84/04 (2009.01)
CPC H04W 60/005 (2013.01) [H04W 76/15 (2018.02); H04W 84/042 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method performed by a processor in a user equipment, UE, having multiple universal subscriber identity modules, USIMs, the method comprising:
registering the UE in a first public land mobile network, PLMN;
moving the UE into a connection management, CM,-connected state in the first PLMN;
setting up a protocol data unit, PDU, session in the first PLMN;
using a domain name system, DNS, via the PDU session in the first PLMN, to select a non-3GPP interworking function, N3IWF, in a second PLMN;
accessing the N3IWF selected via internet protocol, IP, connectivity provided by the first PLMN;
initiating a registration procedure with a first access and mobility management function, AMF, node in the second PLMN using the N3IWF selected, the UE indicating that the AMF node shall only use N3IFW for non-access stratum, NAS, notifications after registration;
completing the registration procedure to register with the second PLMN; and
setting up a PDU session with a session management function, SMF, node in the second PLMN without user plane resources.