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Support mobile device in asymmetric link environment

  • US 7,295,551 B1
  • Filed: 12/28/2000
  • Issued: 11/13/2007
  • Est. Priority Date: 12/28/2000
  • Status: Expired due to Term
First Claim
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1. In a Foreign Agent, a method of registering a mobile device with a Home Agent in an asymmetric link environment, the method comprising:

  • associating each one of a plurality of interfaces of the Foreign Agent with a different care-of address such each of the plurality of interfaces is mapped to a different care-of address;

    sending at least one agent advertisement including the care-of address for each of the plurality of interfaces of the Foreign Agent via one or more uplinks;

    receiving a registration request forwarded via a downlink router, the registration request identifying a care-of address associated with only one of the plurality of interfaces of the Foreign Agent;

    ascertaining the one of the plurality of interfaces identified by the care-of address in the registration request, thereby identifying the interface to which the mobile device has roamed;

    forwarding the registration request to the Home Agent;

    receiving a registration reply from the Home Agent; and

    forwarding the registration reply to the mobile device via the ascertained interface.

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