Altitude-based indoor or outdoor detection
US9998874B2 · kind B2 · utility
1Cited by
0References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 26, 2016 |
| Grant date | Jun 12, 2018 |
| Priority date | — |
| Expiry date | Oct 14, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W4/33
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Using estimates of a receiver's altitude to determine where a receiver is located and to refine a positioning system's estimate of a receiver's position. Systems and methods determine whether a receiver is inside or outside a building, and may use the determination to confirm or adjust an initial estimate of the receiver's position. Various approaches for making the determination and for assessing the initial estimate of the receiver's position are described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.