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Radio network and method of operation with location computation

  • US 6,108,315 A
  • Filed: 05/06/1997
  • Issued: 08/22/2000
  • Est. Priority Date: 05/06/1997
  • Status: Expired due to Term
First Claim
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1. A method of operation of a network a plurality of radio stations including first, second and third radio stations in which each radio station communicates with at least two other radio stations, comprising:

  • (a) sending a message and receiving a corresponding reply between the first and second radio stations, the second and third radio stations and the first and third radio stations;

    (b) measuring a time delay between sending of a message and receiving a corresponding reply;

    (c) calculating distances between each radio station and each other radio station, responsive to the step of measuring;

    (d) calculating, from the distances, locations for the second and third radio stations relative to the first radio station;

    (f) repeating steps (a)-(d) for other radio stations in the plurality of radio stations;

    (g) providing absolute location information for the first radio station and absolute location information for at least one other radio station in the network, wherein the least one other radio station included in the step of (f), and the absolute location information for the first radio station and the absolute location information for the least one other radio station is pre-set in the network;

    (h) calculating an absolute location of each of the first, second and third radio stations, and the other radio stations included in step (f) from distances calculated between the radio stations and the absolute location information of the first radio station and absolute location information of the least one other radio station in the network.

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