Systems and methods for using a satellite positioning system to detect moved wlan access points
AssigneeSkyhook Wireless, Inc.
InventorFarshid ALIZADEH-SHABDIZ
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Abstract
The disclosed subject matter generally relates to hybrid positioning systems and methods and, more specifically, systems and methods of detecting moved WLAN assess points using a wireless local area network based positioning system (WLAN-PS) and a satellite-based positioning system (SPS) with at least two satellites measurement.
Claims22
A method of using a Wireless Local Area Network (WLAN) and satellite enabled device to infer that a reference location associated with a detected WLAN access point (AP) is not the present location of the AP, the method comprising:
- identifying WLAN APs detected by the WLAN and satellite enabled device;
- accessing a reference database to obtain a reference location associated with at least one of the WLAN APs;
- receiving a plurality of possible Satellite Positioning System (SPS) location solutions of the device based on satellite measurements from at least three satellites;
- estimating a distance between the reference location associated with the WLAN AP and each of the plurality of possible SPS location solutions;
- and
- inferring that the reference location associated with the WLAN AP is not the present location of the WLAN AP if the distance between the reference location associated with the WLAN AP and a subset of the SPS location solutions is above a predetermined threshold.
A system for using a Wireless Local Area Network (WLAN) and satellite enabled device to infer that a reference location associated with a detected WLAN access point (AP) is not the present location of the AP, the system comprising:
- logic for identifying WLAN APs detected by the WLAN and satellite enabled device;
- logic for accessing a reference database to obtain a reference location associated with at least one of the WLAN APs;
- logic for receiving a plurality of possible Satellite Positioning System (SPS) location solutions of the device based on satellite measurements from at least three satellites;
- logic for estimating a distance between the reference location associated with the WLAN AP and each of the plurality of possible SPS location solutions;
- and
- logic for inferring that the reference location associated with the WLAN AP is not the present location of the WLAN AP if the distance between the reference location associated with the WLAN AP and a subset of the SPS location solutions is above a predetermined threshold.
Dependencies are inferred from the claim text.