Patent ID: 11910307
Assignee: nan
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method, comprising:
receiving, from an internet protocol (IP) multimedia subsystem (IMS), attachment procedure initiation (API) data indicative of a request from a user equipment (UE) to attach to a visited public land mobile network (VPLMN), wherein:
the UE is configured for:
voice over long term evolution (VoLTE) wireless communication; and
third-generation (3G) wireless communication; and

the VPLMN is based on an LTE standard;

determining, based on the API data, a home public mobile network (HPMN) associated with the UE, wherein the HPMN is based on a 3G standard;
outputting notification data to a home location register (HLR) of the HPMN, wherein the notification data indicates the UE is requesting to attach to the VPLMN;
receiving, from the HLR, location update data indicative of:
subscriber data associated with the UE; and
an authentication vector for the UE;

outputting the subscriber data to an extensive markup language (XML) document management server (XDMS) associated with the IMS such that the subscriber data is associated with the UE in the XDMS; and
outputting the authentication vector to a home subscriber server (HSS) associated with the IMS.