Patent ID: 7039404

Claim:
A method comprising: registering at serving node of a wireless packet service and establishing a context, including a home address with the wireless packet service; listening for a registration message from a mobile node at an external interface of the gateway node of the wireless packet service, the registration message containing a care-of address for the mobile node that is outside of the wireless packet service and the home address from the registration with the serving node of the wireless packet service; accepting a registration message from the mobile node at the external interface; registering the mobile node to the care-of address contained in the registration message; sending a registration reply message to the mobile node via the care-of address, the registration reply message indicating successful registration; creating a binding for the mobile node that connects the home address with the care-of address; tunneling packets addressed to the mobile node at the home address to the care-of address; and receiving tunneled packets from the mobile node at the care-of address, decapsulating the tunneled packets and sending them to the appropriate address.