Patent ID: 11870765
Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 8:
9. A method performed by a serving public land mobile network (PLMN) associated with a user equipment (UE), the method comprising:
receiving a public identifier corresponding to the UE, wherein the UE has a home PLMN and the serving PLMN is not the UE's home PLMN;
forwarding to the UE's home PLMN the received public identifier;
receiving, from the UE's home PLMN after the UE has been successfully authenticated by the home PLMN or the serving PLMN, an international mobile subscriber identity (IMSI) that uniquely identifies the UE and is a secret previously shared between the UE and the home PLMN;
receiving authentication information from the home PLMN, the authentication information allowing the serving PLMN to perform authentication of the UE;
using the authentication information to determine, by the serving PLMN, that the UE is successfully authenticated; and
performing a charging control related to the UE.