Estimating the Location of a Wireless Terminal Based on the Lighting and Acoustics in the Vicinity of the Wireless Terminal
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United States of America Patent
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Issued Date -
Mar 20, 2014
app pub date -
Sep 19, 2012
filing date -
Sep 19, 2012
priority date (Note) -
Abandoned
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Abstract
A technique is disclosed for estimating the location of a wireless terminal at an unknown location in a geographic region. The technique is based on a two-part recognition, the first part being that there are certain lighting and acoustic characteristics that are present in some environments while not being present in others, such as lighting flicker and sound reverberation. The second part of the recognition is that a correlation exists between the presence of flicker and reverberation in the vicinity of a wireless terminal and whether the wireless terminal is indoors or not. Under certain environmental conditions, flicker and reverberation are often present indoors but not outdoors. By accounting for flicker and reverberation being detected or not being detected in the vicinity of the wireless terminal, the disclosed technique is able to estimate whether the wireless terminal is indoors, which the technique also uses to improve the location estimate.
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