Navigation server
US8306742B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 3, 2008 |
| Grant date | Nov 6, 2012 |
| Priority date | — |
| Expiry date | Sep 4, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08G1/096844
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A navigation server rapidly generating guide support information in view of a traffic state after occurrence of an accidental situation in a road section, and make a navigation device recognize the same. After occurrence of the accidental situation in a target road section, a changing pattern g2(t) of a cumulative traffic volume CQ of a second position x2 during a first period is estimated, on the basis of a value of a traffic volume Q1 of the target road section at the first time t1. Further, a primary guide support information during the first period is generated on the basis of a standard changing pattern g1(t) of the cumulative traffic volume CQ of the first position x1 and a changing pattern g2(t) of the cumulative traffic volume CQ of the second position x2 as the estimation result.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.