Estimation of position using WLAN access point radio propagation characteristics in a WLAN positioning system
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United States of America Patent
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Apr 10, 2012
Grant Date -
Jul 7, 2011
app pub date -
Mar 14, 2011
filing date -
May 8, 2006
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Abstract
A method for estimating position using WLAN access point radio propagation characteristics in a WLAN location based service is provided. A location-based services system has a plurality of Wi-Fi access points in a target area. The Wi-Fi access points are positioned at geographic locations and have signal coverage areas. A method of characterizing at least one of the Wi-Fi access points comprises determining the geographic location of the Wi-Fi access point, dividing the signal coverage area of the Wi-Fi access point into at least one section, and determining radio propagation characteristics for each section. The radio propagation characteristics of each section characterize a radio channel of the Wi-Fi access point, and the characterization can be used in a location algorithm.
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