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Geolocation of wireless access points for wireless platforms

  • US 9,568,588 B2
  • Filed: 10/14/2011
  • Issued: 02/14/2017
  • Est. Priority Date: 10/14/2011
  • Status: Active Grant
First Claim
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1. A method for identifying a fixed location of at least one target wireless device, comprising:

  • determining a first location of a receiving wireless device operated by a user;

    detecting passively, with the receiving wireless device, a signal from at least one target wireless device in a vicinity of the receiving wireless device;

    assigning, by a processor in the receiving wireless device, a value to a signal strength of the detected signal, the value being calculated by applying a log-distance path loss model;

    correlating the determined first location of the receiving wireless device with the value of the signal strength of the detected signal from the at least one target wireless device at the first location of the receiving wireless device to result in first correlated data;

    repeating the determining, detecting, assigning and correlating for a second location of the receiving wireless device and at least one third location for the receiving wireless device when the receiving wireless device is moved to the second location and to the at least one third location to result in second correlated data and at least one third correlated data;

    applying a trilateration algorithm, by the processor in the receiving wireless device, to the first correlated data, the second correlated data and the at least one third correlated data to determine a plurality of candidate fixed locations for the at least one target wireless device;

    applying a filtering algorithm, by the processor in the receiving wireless device, to the plurality of candidate fixed locations for the at least one target wireless device to identify a fixed location of the at least one target wireless device; and

    outputting the identified fixed location of the at least one target wireless device to the user of the receiving wireless device.

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