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Method and apparatus for locating mobile units tracking another or within a prescribed geographic boundary

DC
  • US 7,199,726 B2
  • Filed: 06/28/2004
  • Issued: 04/03/2007
  • Est. Priority Date: 12/30/2000
  • Status: Expired due to Term
First Claim
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1. A communication system comprising:

  • (i) a portable mobile remote unit;

    (ii) a network of communication units;

    (iii) the portable mobile remote unit able to communicate with at least a transmitter within the network to establish its geographic location within the system;

    (iv) means to request for the location information of portable mobile remote units that are in a geographic boundary that is prescribed within the coverage area of said network;

    (v) means to provide the location information of the portable mobile remote unit to the network upon determination that the portable mobile remote unit is within said prescribed geographic boundary requested by the network;

    (vi) means to determine and report to the system that, another portable mobile remote unit has maintained relative proximity to the portable mobile remote over a period of time while in motion.

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