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Distributed smooth handoff using shadow addresses in IP-based base stations

  • US 20020191560A1
  • Filed: 10/12/2001
  • Published: 12/19/2002
  • Est. Priority Date: 04/04/2001
  • Status: Active Grant
First Claim
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1. A method for carrying out smooth handoff as a mobile station roams from a first base station to a second base station both served by a wireline subnet having a link layer different than the link layer of the wireless network serving the mobile station, the method comprising storing a shadow address in the first base station and the second base station, the shadow address corresponding to the mobile station and having a format compatible with the link layer of the wireline subnet, transmitting a frame containing the packet from the sending device over the wireline subnet using the shadow address as the link layer destination address of the packet, and processing the frame received from either the first base station or the second base station in the mobile station.

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