Systems and methods for using a satellite positioning system to detect moved WLAN access points
First Claim
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1. A method comprising:
- determining an area in which a mobile device may be located using a satellite-based positioning system (SPS), the area determined using the SPS including a set of multiple location estimates determined from satellite measurements from at least two satellites whose signals are received by the mobile device;
determining an area in which the mobile device may be located using a wireless local area network based positioning system (WLAN-PS), the area determined using the WLAN-PS determined from one or more locations in a reference database associated with one or more wireless local area network (WLAN) access points (APs) detected by the mobile device;
comparing the area determined using the SPS to the area determined using the WLAN-PS;
in response to the area determined using the SPS being greater than a threshold distance from the area determined using the WLAN-PS, concluding that the one or more WLAN APs have been moved to be about the area determined using the SPS; and
updating the one or more locations of the one or more WLAN APs in the reference database.
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Abstract
In one embodiment, an area in which a mobile device may be located is determined using a satellite-based positioning system (SPS). An area in which the mobile device may be located is determined using a wireless local area network based positioning system (WLAN-PS). The area determined using the SPS is compared to the area determined using the WLAN-PS. In response to the area determined using the SPS being remote from the area determined using the WLAN-PS, it is concluded that the one or more WLAN APs have been moved to be about the area determined using the SPS. One or more locations of the one or more WLAN APs are updated in the reference database.
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Citations
21 Claims
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1. A method comprising:
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determining an area in which a mobile device may be located using a satellite-based positioning system (SPS), the area determined using the SPS including a set of multiple location estimates determined from satellite measurements from at least two satellites whose signals are received by the mobile device; determining an area in which the mobile device may be located using a wireless local area network based positioning system (WLAN-PS), the area determined using the WLAN-PS determined from one or more locations in a reference database associated with one or more wireless local area network (WLAN) access points (APs) detected by the mobile device; comparing the area determined using the SPS to the area determined using the WLAN-PS; in response to the area determined using the SPS being greater than a threshold distance from the area determined using the WLAN-PS, concluding that the one or more WLAN APs have been moved to be about the area determined using the SPS; and updating the one or more locations of the one or more WLAN APs in the reference database. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 20, 21)
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10. A mobile device comprising:
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a satellite-based positioning system (SPS) configured to determine an area in which the mobile device may be located, the area determined using the SPS including a set of multiple location estimates determined from satellite measurements from at least two satellites whose signals are received by a satellite signal receiver and measurement device of the SPS; and a wireless local area network based positioning system (WLAN-PS) configured to determine an area in which the mobile device may be located, the area determined using the WLAN-PS determined from one or more locations in a reference database associated with one or more wireless local area network (WLAN) access points (APs) detected by a WLAN scanner of the WLAN-PS, wherein the WLAN-PS is further configured to compare the area determined using the SPS to the area determined using the WLAN-PS, in response to the area determined using the SPS being greater than a threshold distance from the area determined using the WLAN-PS, conclude that the one or more WLAN APs have been moved, and update the reference database. - View Dependent Claims (11, 12, 13, 14)
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15. Software encoded in a non-transitory computer readable medium, the software when executed on one or more processors operable to:
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determine a first area in which a mobile device may be located based on satellite measurements from at least two satellites whose signals are received by the mobile device; determine a second area in which the mobile device may be located based on one or more locations in a reference database associated with one or more wireless local area network (WLAN) access points (APs) detected by the mobile device; compare the first area and the second area; in response the first area being greater than a threshold distance from the second area, conclude that the one or more WLAN APs have been moved to be about the first area; and update the one or more locations of the one or more WLAN APs in the reference database. - View Dependent Claims (16, 17, 18, 19)
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Specification