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Portable communication terminal and wireless communication system therefore

  • US 20080004071A1
  • Filed: 08/22/2007
  • Published: 01/03/2008
  • Est. Priority Date: 05/11/2001
  • Status: Abandoned Application
First Claim
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1. A portable communication terminal comprising:

  • a plurality of transceivers each corresponding to at least one of a plurality of wireless communication systems, wherein a preferential wireless communication system is given a first priority to be used for reception and transmission of signals;

    a data communication speed predictor for predicting a future communication speed of the preferential wireless communication system-based on a pilot signal transmitted from a base station corresponding to the preferential wireless communication;

    a wireless communication system selector for selecting an optimal wireless communication system from among the plurality of wireless communication systems in response to the future communication speed of the preferential wireless communication system predicted by the data communication speed predictor;

    a wireless communication system changeover instructor for sending a changeover instruction of the wireless communication system to a base station presently used in data communication, when the selected wireless communication system differs from the wireless communication system presently used in data communication; and

    a changeover unit for changing the transceiver presently used in data communication to suit the selected wireless communication system.

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