Patent ID: 11910184
Assignee: NEC CORPORATION
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. A method for establishing a secure connection between a user equipment (UE) and a network, the method comprising:
sending, from the UE to a first node of the network, a registration request including information indicating whether the UE has a subscription for specific service, wherein the registration request includes a first identifier, and the first identifier includes the information;
verifying, by the first node of the network, the registration request;
sending an authentication request to a second node of the network upon successful verification of the information based on a second identifier which is included in the first identifier, wherein the second identifier routes nodes of the network for the specific service, and the authentication request includes the first identifier, UE network access capability and a third identifier, wherein the third identifier identifies a specific serving network;
verifying, by the second node of the network, the third identifier;
sending, by the second node of the network, upon successful verification of the third identifier, an authentication data request to a third node of the network based on the second identifier;
de-concealing the first identifier, by the third node of the network, to verify UE network access restriction information; and
sending, by the third node of the network, upon successful verification of the de-concealed first identifier and the information, an authentication data feedback to the second node of the network including the first identifier and authentication vector for the specific service.