SYSTEM AND METHOD FOR REFINING A WLAN-PS ESTIMATED LOCATION USING SATELLITE MEASUREMENTS IN A HYBRID POSITIONING SYSTEM
First Claim
1. A method of determining the location of a WLAN and satellite enabled device by using two or more satellite measurements to refine an initial WLAN based location determination, the method comprising:
- estimating a position of the WLAN and satellite enabled device using a WLAN positioning system;
gathering satellite location measurements from at least two satellites;
determining an uncertainty area around the WLAN location estimate based on the expected error of the WLAN location estimate, wherein the uncertainty area has a plurality of possible location solutions; and
determining the device location estimate inside the WLAN location uncertainty that best satisfies the satellite measurements.
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Abstract
This disclosure describes a system and method for refining a WLAN-PS estimated location using satellite measurements. In some embodiments, the disclosure relates to a method of determining the location of a WLAN and satellite enabled device by using two or more satellite measurements to refine an initial WLAN based location determination. The method can include estimating a position of the WLAN and satellite enabled device using a WLAN positioning system, gathering satellite location measurements from at least two satellites, determining an uncertainty area around the WLAN location estimate based on the expected error of the WLAN location estimate, wherein the uncertainty area has a plurality of possible location solutions, and determining the device location estimate inside the WLAN location uncertainty that best satisfies the satellite measurements.
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Citations
16 Claims
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1. A method of determining the location of a WLAN and satellite enabled device by using two or more satellite measurements to refine an initial WLAN based location determination, the method comprising:
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estimating a position of the WLAN and satellite enabled device using a WLAN positioning system; gathering satellite location measurements from at least two satellites; determining an uncertainty area around the WLAN location estimate based on the expected error of the WLAN location estimate, wherein the uncertainty area has a plurality of possible location solutions; and determining the device location estimate inside the WLAN location uncertainty that best satisfies the satellite measurements. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system for increasing the accuracy of a WLAN based position estimate using satellite positioning information, the system comprising:
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a hybrid positioning module comprising; a WLAN module for receiving information from one or more WLAN access points; and a satellite positioning module for obtaining satellite information from at least two different satellites; logic in the WLAN positioning module for determining an uncertainty area around the WLAN location estimate based on the expected error of the WLAN location estimate, wherein the area has a plurality of possible location solutions; and logic in the hybrid positioning module for determining the device location as the WLAN location estimate that best satisfies the satellite measurements. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification