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Method and apparatus for handing off a mobile terminal between a mobile network and a wireless lan

  • US 20050021586A1
  • Filed: 12/10/2002
  • Published: 01/27/2005
  • Est. Priority Date: 12/19/2001
  • Status: Active Grant
First Claim
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1. A method for controlling a mobile terminal, comprising the steps of:

  • establishing an association with a first access network to connect to a core network;

    determining when the mobile terminal is entering a coverage area of a second access network, which is overlaid within the first access network;

    determining whether the mobile terminal has an active call session via the first access network when the mobile terminal enters the second access network, and if so, maintaining the association with the first access network when the mobile terminal enters the coverage area of the second access network until the active call session is terminated, and upon termination of the call session, disassociating from the first access network and establishing an association with the second access network to connect to the core network.

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