Patent ID: 8130771

Claim:
A method for network based mobility management, said method comprising: registering a mobile access terminal (AT) and a first IP gateway (IPGW) with a home agent (HA) when a wireless communication session is established between the mobile AT and the first IPGW; and transferring context information regarding the mobile AT and a proxy mobile security key obtained by the first IPGW, from the first IPGW to a second IPGW when the mobile AT moves from a first access network associated with the first IPGW to a second access network associated with the second IPGW, wherein said context information and said proxy mobile security key are transferred to the second IPGW without communicating any of said context information and said proxy mobile key with the mobile AT, and the context information and the proxy mobile security key are transferred from the first IPGW to the second IPGW without communicating any of said context information and said proxy mobile key through an authentication, authorization and accounting (AAA) server, and the proxy mobile security key is associated with the context information.