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Estimating the location of a wireless terminal based on the lighting and acoustics in the vicinity of the wireless terminal

  • US 9,285,455 B2
  • Filed: 09/19/2012
  • Issued: 03/15/2016
  • Est. Priority Date: 09/19/2012
  • Status: Active Grant
First Claim
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1. A method of estimating the probability that a wireless terminal is indoors, the method comprising:

  • generating, by the wireless terminal and as a consequence of the wireless terminal'"'"'s normal operation, sound;

    measuring, by the wireless terminal, a sample of sound in the vicinity of the wireless terminal, wherein at least a portion of the generated sound is the sound that is measured by the wireless terminal;

    generating, by the wireless terminal, a characterization of reverberation in the vicinity of the wireless terminal based on the sample of sound in the vicinity of the wireless terminal;

    measuring, by the wireless terminal, a sample of light in the vicinity of the wireless terminal;

    generating, by the wireless terminal, a characterization of flicker in the vicinity of the wireless terminal based on the sample of light in the vicinity of the wireless terminal; and

    generating, by the wireless terminal, an estimate of the probability that the wireless terminal is indoors based on;

    (i) the characterization of reverberation in the vicinity of the wireless terminal; and

    (ii) the characterization of flicker in the vicinity of the wireless terminal.

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