Method and apparatus for on-device positioning using compressed fingerprint archives
US9182472B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 9, 2014 |
| Grant date | Nov 10, 2015 |
| Priority date | — |
| Expiry date | Jan 9, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W64/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus are provided for on-device positioning using compressed fingerprint archives. The method and apparatus may be configured to provide compression of localization fingerprints, to facilitate efficient on-device positioning based on the RF fingerprint model, and to estimate the physical distance between two or more devices. Embodiments of the method may receive a space-to-access point histogram that corresponds to an access point as observed in a space. A mean, standard deviation, and weight may be calculated and assigned for each of a plurality of access points as observed within a space. The mean, standard deviation, and weight of each access point may be combined to form a data triple. The data triples may be combined to form a fingerprint of access points observed from that space. The data triple or plurality of data triples with the lowest assigned weight(s) may be removed from the fingerprint.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.