Navigation device that performs pathfinding in consideration of congestion information in plural areas using average speed in the plural areas
US8452530B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Oct 1, 2007 |
| Grant date | May 28, 2013 |
| Priority date | — |
| Expiry date | Sep 27, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09B29/10
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A navigation device divides a pathfinding range into plural areas and performs pathfinding in consideration of congestion information. The navigation device includes a forecast congestion information generating unit configured to generate forecast congestion information corresponding to a predetermined time based on traffic information; and a forecast congestion information applying unit configured to apply, to each of the areas, the forecast congestion information corresponding to a time when a vehicle arrives in each of the areas. The navigation device includes an area setting unit configured to set regions divided by concentric circles centering around a present location, as the plural areas. The radius of the concentric circles is incremented by a fixed length that is set beforehand for each region or each time zone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.