Communication system with mobile terminal accessible to mobile communication network and local network simultaneously

  • US 7,876,736 B2
  • Filed: 07/10/2007
  • Issued: 01/25/2011
  • Est. Priority Date: 09/08/2000
  • Status: Active Grant
First Claim
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1. An address assignment method for a mobile terminal device capable of accessing both a mobile communication network and a local network simultaneously, the method comprising:

  • transmitting to a gateway device an inquiry message for inquiring information regarding a location on networks of a correspondent of packet communications to be carried out, from the mobile terminal device through the local network;

    receiving a response message in response to the inquiry message through the local network at the mobile terminal device;

    acquiring an address to be used by the mobile terminal device in the packet communications with the correspondent according to the response message;

    assigning the address to a first communication interface for the local network at the mobile terminal device;

    communicating with the correspondent using the address assigned to the first communication interface; and

    judging a manner of utilizing first packet communications carried out through the first communication interface and second packet communications carried out through a second communication interface provided for the mobile communication network in the mobile terminal device according to a prescribed policy, when both the first packet communications and the second packet communications are possible.

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