Navigation system and method for calculating a guide route
US6351707B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 25, 1998 |
| Grant date | Feb 26, 2002 |
| Priority date | — |
| Expiry date | Feb 25, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08G1/096872
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The invention provides a navigation system that is able to accurately calculate the cost during searching or guiding a route. The navigation controller of the navigation system is comprised of a map buffer that stores various data for displaying maps and searching routes, a route search processor for searching routes, a guide route memory, and a route search memory. When the search key of the remote control unit is pressed, the route search processor makes an intersection network list necessary for a route search between two intersections to store in the route search memory. Further, the route search processor modifies a link cost in the route search memory by replacing it with a statistical cost representing a statistically obtained time that is required for actually passing through the road link, and executes the route search on the basis of the modified cost data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.