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Process and device for transmitting data between vehicles moving over a track

  • US 4,723,737 A
  • Filed: 10/17/1985
  • Issued: 02/09/1988
  • Est. Priority Date: 10/18/1984
  • Status: Expired due to Fees
First Claim
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1. A process for data communication in the form of successive different messages, each consisting of multibit coded data between railways vehicles moving over a same track,including:

  • sending each message to be transmitted from one of said travelling vehicles, in the form of a predetermined plurality of short identical transmissions of said message of multibit coded data at random times by modulating a directional micro-wave beam whose angular opening is sufficient in the horizontal direction for maintaining communication in bends of said track and switches and in the vertical direction for maintaining communication during changes in the profile of the track; and

    repeating each said message m successive times during a refreshment period T, each time at a random moment varying throughout the full length of a particular segment, of duration T/m.

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