Patent ID: 7650148

Claim:
A method of registering and handing off a mobile node, comprising the operations of: collecting a Media Access Control (MAC) address of a user of the mobile node and transmitting the MAC address from an access point (AP) to an Access Point Manager (APM) when association occurs between the AP and the mobile node; determining one among initial registration of the mobile node and moving of the mobile node based on the MAC address in the APM; sending a MAC request message to a Home Subscriber Server (HSS) of the initial registration of the mobile node is determined; and updating a database with the MAC address of the mobile node and transmitting registration information to the AP, if the initial registration is determined by the HSS receiving the MAC request message, wherein the operation of updating the database and transmitting the registration information comprises the operations of: requesting the AP to update the MAC address of the mobile node if the AP belongs to a new area which the mobile node moves to and enters; and requesting an old APM that the mobile node accessed to cancel information of the mobile node.