Vehicle navigation system with route updating feature
US6351709B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 2, 1998 |
| Grant date | Feb 26, 2002 |
| Priority date | — |
| Expiry date | Dec 2, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08G1/22
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A vehicle navigation system includes an update module that provides travel advisory information on a real time basis. The update module receives traffic advisory signals such as intelligent highway system signals, safety warning system signals and specially encoded traffic reports from radio stations. The travel advisory signals are utilized by the navigation system to provide a route guidance strategy to a driver that is not limited by the information from a prestored map database. While travelling, the update module continues to provide information that is utilized to generate an updated route as appropriate. Additionally, the vehicle navigation system preferably includes the ability to generate a beacon signal indicating that the vehicle is in a position or condition that presents a potential traffic hazard to other drivers. The beacon signal from the navigation system of this invention is one example of the kind of travel advisory signal that the inventive navigation system uses to generate an updated route guidance strategy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.