Patent ID: 7139833

Claim:
A method for transmitting information in a Mobile Internet Protocol (IP) network including a mobile node (MN), a base station (BS) and a home network, wherein a proxy mobile node (PMN) and a foreign agent (FA) are provided at the BS, and a home agent (HA) is provided at the home network, the method comprising the steps of: the MN detecting the BS from a pilot signal broadcast from the BS; the PMN identifying the MN from link layer messages that provide an identity of the MN to the BS; the PMN retrieving an IP address for each of the MN, FA and HA from a database based on the identity of the MN, the MN not participating in Mobile IP registration; the PMN generating and sending a registration request as a network message with the IP address of the MN to the FA on behalf of the mobile node (MN); the FA relaying the request to the HA; the HA registering the PMN identified with the MN; the HA forwarding Mobile IP packet to the FA by encapsulating the information into at least one Mobile IP packet; the FA unencapsulating the forwarded IP packet into original data; the FA forwarding the original data to the MN; determining whether a new base station including a new proxy mobile node (PMN) is detected from a pilot signal broadcast from the new base station; if it is determined that a new base station is detected, (a) the MN transmitting link layer messages that provide the identity of the MN to the new BS; (b) the new PMN identifying the MN from the link layer messages; (c) the new PMN retrieving an IP address for the MN, a new foreign agent (FA), and the HA from the database based on the identity of the MN; (d) the new PMN generating and sending a new registration request to the new FA associated with the new BS on behalf of the mobile node (MN); (e) the new FA relaying the new registration request to the HA; (f) the HA registering the new PMN; and (g) the HA forwarding the Mobile IP packet to the new FA.