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METHOD AND SYSTEM FOR LOCATION ESTIMATION

  • US 20150249907A1
  • Filed: 02/28/2014
  • Published: 09/03/2015
  • Est. Priority Date: 02/28/2014
  • Status: Active Grant
First Claim
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1. A location estimation method comprising:

  • performing a wireless scanning so as to receive wireless signals from one or more access points from among a plurality of access points positioned at plurality of locations, respectively, at one or more floors from among a plurality of floors within a multi-floor environment;

    computing a first set of received signal strength indication (RSSI) measurements corresponding to the wireless signals;

    determining absolute floor location information in the multi-floor environment based on the first set of RSSI measurements and a pre-defined objective function, the pre-defined objective function configured to maximize a probability of a user being located at a floor from among the plurality of floors so as to receive the wireless signals corresponding to the first set of RSSI measurements, wherein the probability is estimated based on a three-dimensional channel model comprising a plurality of channel model parameters;

    determining a user floor location based on the absolute floor location information; and

    estimating the user location in the multi-floor environment based at least in part on the user floor location.

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