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Continuous mobility across wireless networks by integrating mobile IP and GPRS mobility agents

  • US 7,039,404 B2
  • Filed: 06/27/2002
  • Issued: 05/02/2006
  • Est. Priority Date: 06/27/2002
  • Status: Expired due to Fees
First Claim
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1. 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.

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