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Crowd-sourced information for interior localization and navigation

  • US 8,320,939 B1
  • Filed: 04/21/2011
  • Issued: 11/27/2012
  • Est. Priority Date: 04/21/2011
  • Status: Active Grant
First Claim
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1. A method comprising:

  • determining, by a processor, that a GPS signal is insufficient to accurately determine position based on a characteristic of the GPS signal;

    identifying an entrance location of a building based on a GPS coordinate identified before determining that the GPS signal is insufficient;

    after the GPS signal is determined to be insufficient, recording a set of route data including a timestamp, accelerometer data, and a wireless network signal fingerprint comprising one or more wireless network signal beacon identifiers and associated signal strengths;

    identifying an exit location of the building based on a GPS coordinate determined after the processor is able to accurately determine position based on GPS signals;

    storing the entrance location, the exit location, and the route data in memory accessible by the client device;

    generating, by the processor, a track including a set of location coordinates based on the route data, the entrance location, and the exit location; and

    transmitting the track to a server.

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