Method and system for managing mobility in mobile telecommunication system using mobile ip

The present invention relates to a method for managing mobility of a mobile station in a mobile communication system, the subscriber station and the base station, and signaling and a radio network controller, the access gateways, authentication and billing to the server is involved The authentication and accounting server and the terminal wherein the terminal and generating a first key for mutual authentication with the home agent, and wherein the authentication and charging server and the access gateway, the access gateway during the connection authentication procedure performed with said grooves generating the second key for mutual authentication of the agent and the step of the access gateway, generating a third key for mutual authentication with the access gateway and the terminal, the terminal in the external network from the access gateway, the process of obtaining the temporary address to be used and the terminal the first key, generating a first authentication extension value and the third key to produce a third authentication extension value and, with the home address of the mobile station, the address of the home agent and a process of transmitting a registration request message including the temporary address to the access gateway, comprising: The access gateway is the process of the above third authentication extension value included in the registration request message transmitted from the UE verified the third key, and, after the third verification of the authentication extension value that the access gateway uses the second key and transmitting a registration request message including the generated second authentication extension value to the home agent, and, if the home agent, upon receiving the registration request message from the access gateway, the first authentication extension value and the second authentication when using the expansion value is performed verification of the the terminal and the access gateway, respectively, and the validation is successfully completed, the home agent is allocated to the MS, the process of assigning a home address of the subscriber station and the Home of an agent is assigned to the registration response message, the response of the registration request message, the terminal Including the process of transferring to a home address. Mobile IPv4, 3GPP2 UMB, authentication