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Wireless communication system and mobile terminal

  • US 20090285184A1
  • Filed: 07/23/2009
  • Published: 11/19/2009
  • Est. Priority Date: 10/01/2003
  • Status: Abandoned Application
First Claim
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1. A terminal device, having a network address, connected to a public network through a gateway connected to said public network, and through first wireless communication equipment and second wireless communication equipment, said first wireless communication equipment and said second wireless communication being connected to said gateway, said terminal device comprising:

  • a first wireless interface having a first interface address to communicate with said first wireless communication equipment;

    a second wireless interface having a second interface address to communicate with said second wireless communication equipment;

    a controller to monitor at least communication quality of said first wireless interface, and select any one of said wireless interfaces for communication on a basis of said monitored communication quality; and

    a memory to store a correspondence of any one of said first and second interface addresses with the network address of said terminal device,wherein said controller associates an interface address of said selected wireless interface with said network address, stores said correspondence in said memory, and updates said correspondence in said memory if the controller selects a wireless interface which is not currently used,said controller notifies a gateway of said correspondence via said first or second wireless communication equipment,wherein if the communication quality of said first wireless interface does not meet a predetermined criterion during communication using said first wireless interface, said controller transmits a switching request to said gateway via said first wireless interface, receives a switching response via said first wireless interface, causes said memory to store a correspondence between said second interface address and said network address, and starts communication using said second wireless interface, andwherein if the communication quality of said first wireless interface meets a predetermined criterion during communication using said second wireless interface, said controller transmits a switching request to said gateway via said second wireless interface, receives a switching response through said second wireless interface, causes said memory to store a correspondence between said first wireless interface address and said network address, and starts communication using said first wireless interface.

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