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Method for data communication between a vehicle and a remote terminal

  • US 20060213731A1
  • Filed: 05/08/2006
  • Published: 09/28/2006
  • Est. Priority Date: 11/17/1999
  • Status: Active Grant
First Claim
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1. A system for data communication associated with a vehicle comprising a tractor and:

  • at least one wheeled apparatus pulled by the tractor, said system comprising;

    a first data communications apparatus associated with the tractor;

    a second data communications apparatus associated with the at least one wheeled apparatus;

    a power line carrier comprising at least one electrical conductor operatively interconnecting said first and second data communications apparatuses, said at least one electrical conductor comprising a data bus for transmitting data between said first and second data communications apparatuses;

    a data communications protocol used for transmitting data along said data bus, the data comprising a plurality of data bits which transition between logic values indicating whether said data bus is in an active or an idle state; and

    a processor for interrogating data transmitted along said data bus to sense a transition in logic values and a change in said data bus from the active to the idle state.

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