Facilitation of indoor localization and fingerprint updates of altered access point signals
AssigneeThe Hong Kong University of Science and Technology
InventorsShueng Han Gary Chan, Suining He
Life of this patent
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Abstract
When access point signals are altered, conventional fingerprint-based indoor localization techniques are note accuracy. Localization with altered access point and fingerprint updating can achieves accurate indoor localization and automatically update a fingerprint database with altered access points. Using subset sampling, the system detect the altered access points, filter them out by a received signal strength vector and find the location of a client. Given the received signal strength vectors received and the estimated location, the system can update a fingerprint database with the signal changes by applying a non-parametric Gaussian process regression method.
Claims20
A method, comprising:
- identifying, by a wireless network device comprising a processor, a first location associated with an access point device of access point devices;
- in response to identifying a second location associated with the access point device and different than the first location, determining, by the wireless network device, that the access point device has become an altered access point device;
- associating, by the wireless network device, a reference location with the altered access point device;
- applying, by the wireless network device, a Gaussian regression analysis to the reference location;
- filtering, by the wireless network device, the altered access point device from the access point devices;
- and
- in response to the filtering, updating, by the wireless network device, the reference location associated with the altered access point device.
A system, comprising:
- a processor;
- and
- a memory that stores executable instructions that, when executed by the processor, facilitate performance of operations, comprising:
- identifying a first power associated with an access point device of access point devices;
- in response to identifying a second power associated with the access point device and different than the first power, determining that the access point device has become an altered access point device;
- estimating a likelihood of an altered access point signal associated with the altered access point device;
- grouping received signal strengths associated with the access point devices, resulting in grouped signal strengths;
- based on the grouped signal strengths, estimating corresponding locations associated with the access point devices, resulting in estimated corresponding locations;
- applying a Gaussian regression analysis to the estimated corresponding locations;
- in response to determining a first location of a mobile device, identifying a second location associated with the altered access point device;
- and
- updating a data store with a received signal strength associated with the altered access point device relative to the first location of the mobile device.
A non-transitory machine-readable storage medium, comprising executable instructions that, when executed by a processor, facilitate performance of operations, comprising:
- identifying a first power associated with an access point device of access point devices;
- in response to identifying a second power associated with the access point device that is different than the first power, determining that the access point device has become an altered access point device;
- measuring received signal strengths from the access point devices;
- based on the received signal strengths, grouping the access point devices, resulting in grouped access point devices;
- in response to the grouping of the access point devices, estimating a location of the altered access point device resulting in an estimated location;
- and
- applying a regression analysis to the estimated location of the altered access point device.
Dependencies are inferred from the claim text.