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  • US 20040028079A1
  • Filed: 03/07/2003
  • Published: 02/12/2004
  • Est. Priority Date: 03/07/2002
  • Status: Abandoned Application
First Claim
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1. A data transmission system comprising:

  • a data distribution unit for distributing items of data to data terminals; and

    a plurality of data terminals capable of requesting items of data from the data distribution unit;

    a point-to-point communication system whereby each data terminal can transmit point-to-point messages from itself to the data distribution unit; and

    a broadcast communication system whereby the data distribution unit can broadcast data to all the terminals;

    the data terminals being arranged to transmit requests for items of data to the data distribution unit via the point-to-point communication system, and the data distribution unit being arranged to, in response to receiving such a request, retrieve the requested item of data and transmit it via the broadcast communication system.

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