Method of improving a vehicle emergency call network
US7705775B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 30, 2005 |
| Grant date | Apr 27, 2010 |
| Priority date | — |
| Expiry date | Mar 28, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/47
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of improving a vehicle emergency call network used during an enhanced 911 call, which is especially useful in environments having degraded GPS signals. The present method utilizes an independent position enhancement algorithm, such as a dead reckoning algorithm, and converts the output of that algorithm into a compatible format compatible with a position determining entity (PDE). Some independent position enhancement algorithms return output in the form of position information (typically, two- or three-dimensional coordinates), however, most PDEs only accept information in the form of pseudo-ranges. Thus, the present method provides a technique in which the advantages of an independent position enhancement algorithm are enjoyed, yet a compatible output is sent to the PDE.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.