Patent ID: 7941143
Filing Date: 2011-05-10
Classification: H04L,H04W

Abstract:
1. A method of registering a mobile station operating in a second wireless communication system based on a first set of authentication parameters corresponding to an authentication of the mobile station on a first wireless communication system, the method comprising the steps of: receiving a provisional authentication request from the mobile station at a proxy authentication agent for operation on the second wireless communication system; establishing a provisional authentication for the mobile station using a second set of authentication parameters, the second set of authentication parameters generated in the second wireless communication system wherein the establishing step comprises: negotiating an authentication request in conjunction with the mobile station to obtain the first set of authentication parameters from the first wireless communication system based on the provisional authentication; sending the first set of authentication parameters from the first wireless communication system to the proxy authentication agent in response to the authentication request; retaining a first portion of the first set of authentication parameters at the proxy authentication agent; forwarding a second portion of the first set of authentication parameters to the mobile station in response to the authentication request; deriving an authentication secret at the mobile station and at the proxy authentication agent based on a predetermined procedure performed using the second portion of the first set of authentication parameters; sending an authentication response to the first wireless communication system via the proxy authentication agent; sending an authentication acknowledgement to the mobile station in response to the authentication response, and authenticating the mobile station in the second wireless communication system using the first set of authentication parameters and the authentication secret.