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Two way tracking system and method using an existing wireless network

  • US 6,498,565 B2
  • Filed: 02/06/2001
  • Issued: 12/24/2002
  • Est. Priority Date: 02/07/2000
  • Status: Expired due to Term
First Claim
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1. A system for tracking an object, person or animal, the object, person or animal being provided with a tracking wireless transceiver, comprising:

  • receiver means for receiving an indication that the object, person or animal needs to be tracked;

    wireless radio means for wirelessly communicating with the tracking wireless transceiver;

    means for estimating coordinates of the object, person or animal based on a location of one or more sites communicating with the tracking wireless transceiver; and

    at least one wireless device provided with the object, person or animal, for wirelessly communicating with the tracking wireless transceiver;

    wherein the at least one wireless device includes;

    a receiver for receiving messages from the tracking wireless transceiver; and

    an interface connected to the receiver, for generating a message indicating that the object, person or animal is being tracked.

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