Building floor determination for a location based service
US9485626B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 19, 2013 |
| Grant date | Nov 1, 2016 |
| Priority date | — |
| Expiry date | Jul 24, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W64/00
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A device stores an indication of a current floor of a multiple floor building on which a device is located. The device measures signal strengths of signals received at the device from transmitters having known locations on the floors of the building. The device selects one of the multiple floors as a candidate floor based in part on the measured signal strengths. The device increases a confidence level associated with the indication of the current floor if the candidate floor corresponds to the current floor, and decreases the confidence level if the candidate floor does not correspond to the current floor. The device replaces the indication of the current floor with the candidate floor if the confidence level is below a threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.