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Utilizing a pressure profile to determine a location context identifier

  • US 9,131,347 B2
  • Filed: 09/06/2013
  • Issued: 09/08/2015
  • Est. Priority Date: 04/26/2013
  • Status: Expired due to Fees
First Claim
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1. A method comprising:

  • obtaining, at a mobile device, positioning assistance data comprising a radio heat map defining a plurality of predetermined locations in an area identified via a location context identifier (LCI), said radio heat map comprising one or more expected altitude values for at least some of said predetermined locations relative to a reference altitude value within said area;

    measuring an altitude of said mobile device relative to said reference altitude value based, at least in part, on one or more barometric pressure measurements obtained via a barometric pressure sensor of said mobile device; and

    estimating a location of said mobile device based, at least in part, on at least one signal pattern matching operation with respect to said one or more expected altitude values and said altitude measured via said one or more barometric pressure measurements.

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