Proximity determination based on distance ratios
US8948782B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2012 |
| Grant date | Feb 3, 2015 |
| Priority date | — |
| Expiry date | Aug 5, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W4/80
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Systems and methods of determining proximity of a mobile device to a target location are described herein. A method as described herein includes identifying a signal sent by the mobile device and received by respective ones of a set of receivers including at least a first receiver and a second receiver, wherein the first receiver and second receiver are positioned collinearly to the target location; determining a first signal-quality metric observed at the first receiver and a second signal-quality metric observed at the second receiver with respect to the signal; computing a ratio associated with distances from the mobile device to the first receiver and the second receiver, respectively, based on the first signal-quality metric and the second signal-quality metric; and determining whether the mobile device is within a proximity region defined in relation to the target location based on the ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.