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Vehicle location method and system

  • US 5,450,329 A
  • Filed: 12/22/1993
  • Issued: 09/12/1995
  • Est. Priority Date: 12/22/1993
  • Status: Expired due to Term
First Claim
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1. A target vehicle location method for locating a target vehicle, comprising:

  • dividing a predetermined area into grid segments having predetermined dimensions in latitude and longitude;

    assigning a reference waypoint to each grid segment at a predetermined location within the grid segment;

    generating a synthetic latitude function, time mapped onto each grid segment in accordance with a predetermined time period and sequence;

    generating a synthetic longitude function, time mapped onto each grid segment in accordance with a predetermined time period and sequence, the synthetic latitude and longitude functions together defining a plurality of time slots for each grid segment;

    providing the target vehicle with global position information indicating a position of the target vehicle ill latitude and longitude coordinates;

    converting the global position information to relative position with respect to the reference waypoint of the grid segment in which the target vehicle is located;

    assigning a time slot from the plurality of time slots for the target vehicle based upon the target vehicle'"'"'s relative position within the grid segment in which it is located; and

    transmitting, during the assigned time slot, a data message containing information indicative of the target vehicle'"'"'s position.

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