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

Claim 0:
1. A communication system comprising:
a user equipment (UE);
a first node;
a second node; and
a third node,
wherein the first node is configured to:
receive a registration request transmitted by the UE, 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;
verify the registration request, and
send an authentication request to the second node of the network including a second identifier 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;
wherein the second node of the network is configured to:
verify the third identifier, and
send, to the third node, upon successful verification of the third identifier, an authentication data request based on the second identifier, and

wherein the third node is configured to:
de-conceal the first identifier to verify UE network access restriction information;
send 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.