Patent ID: 9166799
Filing Date: 2015-10-20
Classification: H04L,H04W

Abstract:
1. A method comprising: sending a challenge from a first device to a mobile station, the first device operating as a bridge between the mobile station and an IP multimedia subsystem (IMS) network that includes a home subscriber server, in which the IMS network is configured to use an authentication protocol to establish security associations with mobile stations, and the mobile station is not compatible with the authentication protocol used by the IMS network; at the first device, receiving a first authentication response from the mobile station through a wireless link, generating a secret key based on the first authentication response, and generating a second authentication response based on the secret key, in which the first authentication response is generated based on the challenge and an authentication key stored at the mobile station; and providing the second authentication response to the IMS network for authenticating the mobile station to enable the mobile station to access the IMS network, in which the second authentication response is generated by the first device based on the secret key that is generated by the first device based on the first authentication response provided by the mobile station.