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Fleet tracking method using unicast and multicast communication

  • US 8,660,791 B2
  • Filed: 06/30/2011
  • Issued: 02/25/2014
  • Est. Priority Date: 06/30/2011
  • Status: Active Grant
First Claim
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1. A method of tracking a fleet of machines, comprising:

  • repetitively receiving at a central controller an unacknowledged message from communicating devices onboard the fleet of machines that includes a current location of each of the fleet of machines determined by locating devices onboard the fleet of machines;

    updating a location listing of the fleet of machines with the current location; and

    repetitively multicasting the location listing to the communicating devices at a first frequency greater than a second frequency at which the unacknowledged message is repetitively received, wherein repetitively receiving the unacknowledged message includes repetitively receiving the unacknowledged message at a frequency that increases with a decreasing distance of the associated machine to another machine of the fleet of machines.

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