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Mobile IP dynamic Home Address resolution

  • US 7,447,183 B1
  • Filed: 11/20/2002
  • Issued: 11/04/2008
  • Est. Priority Date: 01/08/1999
  • Status: Expired due to Term
First Claim
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1. A Home Agent, comprising:

  • a processor; and

    a memory, at least one of the processor or the memory being for;

    receiving a registration request packet from a mobile node;

    determining from the registration request packet whether the mobile node needs an IP address; and

    determining whether the Home Agent has previously assigned an IP address to the mobile node when it is determined that the mobile node needs an IP address;

    when the Home Agent determines that the Home Agent has previously assigned an IP address to the mobile node, obtaining the IP address previously assigned to the mobile node, composing a registration reply including the IP address previously assigned to the mobile node and sending the registration reply to the mobile node; and

    when the Home Agent determines that the Home Agent has not previously assigned an IP address to the mobile node, assigning an IP address to the mobile node, composing a registration reply including the IP address and sending the registration reply to the mobile node;

    wherein the registration request packet further includes an ID indicator, the ID indicator indicating that the mobile node has an IP address when the ID indicator is in a first state, and otherwise indicating that the mobile node does not have an IP address.

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