Method and apparatus for indoor/outdoor detection using ambient signals
US9326104B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 22, 2014 |
| Grant date | Apr 26, 2016 |
| Priority date | — |
| Expiry date | Jul 12, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W4/40
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Systems and methods for determining whether a mobile device is indoors or outdoors based on ambient signal measurements are described herein. A method for performing indoor/outdoor detection for a mobile device as described herein includes identifying one or more selected radio channels, including at least one of amplitude modulation (AM) radio stations, frequency modulation (FM) radio stations, or television stations, in an area of the mobile device; obtaining information relating to reference outdoor signal strengths for the respective selected radio channels; calculating measured signal strengths for signals received via the selected radio channels; comparing the reference outdoor signal strengths and the measured signal strengths; and classifying the mobile device as indoors or outdoors based on a result of the comparison.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.