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System and method to perform smooth handoff of mobile terminals between fixed terminals in a network

  • US 7,382,740 B2
  • Filed: 01/10/2006
  • Issued: 06/03/2008
  • Est. Priority Date: 01/13/2004
  • Status: Expired due to Term
First Claim
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1. A method for performing handoff of a mobile subscriber device between one or more wireless routers in a communication network, the method comprising:

  • at the mobile subscriber device;

    evaluating respective routing metrics associated with the respective wireless routers as the mobile subscriber device is moving; and

    sending a routing request message to the wireless router whose respective said routing metrics meet a desired criteria, wherein the routing request message is sent by the mobile subscriber device at a periodic rate, wherein the periodic rate is based on an average number of new neighbors added in a neighbor table of the mobile subscriber device; and

    at one of the wireless routers;

    receiving the routing request message; and

    providing the routing request message to the associated access point to inform the associated access point of a route to the mobile subscriber device.

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