Patent ID: 7764948
Filing Date: 2010-07-27
Classification: H04L,H04W

Abstract:
1. An authentication method of an authenticator in a communication system, comprising: receiving from a second Foreign Agent (FA) a location change notification notifying that a Mobile Station (MS) has moved to a service area of the second FA, after the MS completes initial access to a first FA using an Extensible Authentication Protocol (EAP) authentication scheme with an Authorization, Authentication and Accounting (AAA) server in a service area of the first FA; and transmitting a Mobile Node (MN)-FA key and an FA-Home Agent (HA) key of the MS to the second FA in response to the location change notification, the MN-FA and FA-HA keys being generated during the initial access of the MS, wherein the MN-FA key is created based on an FA-Route Key (RK) generated during the initial access of the MS, the FA-RK is created based on a Mobile Internet Protocol (MIP)-RK generated during the initial access of the MS, and the MIP-RK is created based on an Extended Master Session Key (EMSK) generated during the initial access of the MS.