System and Method for Estimating Positioning Error Within a WLAN-Based Positioning System
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United States of America Patent
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Issued Date -
Jan 27, 2011
app pub date -
Jul 24, 2009
filing date -
Jul 24, 2009
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The invention features a method of estimating an expected error of a position estimate for use in a WLAN positioning system that estimates the position of a WLAN-enabled device. The WLAN-enabled device receives signals transmitted by at least one WLAN access point in range of the WLAN-enabled device, and a position of the WLAN-enabled device is estimated based on the received signals from the at least one WLAN access point in range. A signal strength value is measured for the signals transmitted by the at least one WLAN access point, and a maximum signal strength value is determined. The method also estimates an expected error of the position estimate based on the maximum signal strength value of the signals transmitted by the at least one WLAN access point in range of the WLAN enabled device. The expected error predicts a relative accuracy of the position estimate.
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