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Prediction of indoor level and location using a three stage process

  • US 8,700,054 B2
  • Filed: 06/10/2011
  • Issued: 04/15/2014
  • Est. Priority Date: 06/10/2011
  • Status: Active Grant
First Claim
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1. A method, comprising:

  • defining one or more islands, each island being a subdivision of a geographical region and including one or more access points, where any access point in an island is likely not visible outside that island;

    maintaining identifiers of the access points associated with each island;

    building for each island, using a processor, a first classifier, the first classifier including one or more decision trees executable using at least one signal received by a mobile device, the output of the one or more decision trees of the first classifier indicating a level of the indoor area; and

    building for each level, using the processor, a second classifier, a second classifier including one or more decision trees executable using the at least one signal received by the mobile device, the output of the one or more decision trees of the second classifier indicating a position on the level.

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