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System and method for estimating positioning error within a WLAN-based positioning system

DC
  • US 8,909,245 B2
  • Filed: 08/09/2011
  • Issued: 12/09/2014
  • Est. Priority Date: 11/07/2006
  • Status: Active Grant
First Claim
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1. In a Wireless Local Area Network (WLAN) positioning system for estimating the position of a WLAN-enabled device, a method of estimating an expected error of a position estimate of the WLAN-enabled device, the method comprising:

  • receiving an identity of a plurality of WLAN access points in range of the WLAN-enabled device, the plurality of WLAN access points each having an estimated geographic location; and

    estimating an expected error, in terms of distance, of a position estimate of the WLAN-enabled device that would result from using the estimated geographic locations of the plurality of WLAN access points in a position estimation determination, based on a spatial spread of WLAN access points in range of the WLAN enabled device,wherein the spatial spread is a measure of distances between the estimated geographic locations of the plurality of WLAN access points in range of the WLAN enabled device, and the expected error of the position estimate predicts a relative accuracy of the position estimate.

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