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Tire pressure monitoring system transmission protocol

  • US 7,095,316 B2
  • Filed: 11/15/2002
  • Issued: 08/22/2006
  • Est. Priority Date: 11/15/2001
  • Status: Expired due to Term
First Claim
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1. A system for monitoring conditions within a tire comprising;

  • a sensor disposed within a tire for sensing conditions within said tire;

    a transmitter for transmitting a signal indicative of conditions within said tire;

    a receiver for receiving said signal;

    said signal indicative of conditions within a tire includes a first preamble portion and at least one data packet portion wherein there is a variable interval between the at least one data packet portions, wherein said variable interval varies according to the equation Interval length=Standard length+(beta * standard length)Where;

    interval length is the length of time in ms between data frames;

    standard length is a predetermined duration of time in ms; and

    Beta is a random variable with a value between 0 and 1.

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