Patent ID: 8559321

Claim:
A method for identifying a Mobile Internet Protocol (MIP) home agent (HA) in a wireless communication system, comprising: identifying a Packet Data Network Gateway (PDN GW) serving as an anchor point of a network-based mobility protocol used for communication in the wireless communication system; communicating one or more messages to the identified PDN GW containing respective requests for a MIP HA address; receiving information relating to the MIP HA address from the PDN GW in response to the one or more messages, wherein the information relating to the MIP HA address is provided by the PDN GW when the HA is collocated with the PDN GW, and wherein the information relating to the MIP HA address comprises information provided by a different device when the HA is not collocated with the PDN GW; and de-attaching from the PDN GW and re-attaching to a different PDN GW associated with the different device if the information relating to the MIP HA address indicates that the MIP HA is collocated with the different device.