发明名称 |
Method of estimation of traffic information, device of estimation of traffic information and car navigation device |
摘要 |
There is provided a method and a device for accurately estimating traffic information of a link having no traffic information even if different types of roads are mixed. The device finds a parameter characterizing a damping curve of a quantity of change of relative speed based on stored traffic information for links on a city center side on a minimum-time cost route connecting the city center and suburbs, finds a quantity of change of relative speed of the link having no observed traffic information and estimates its traffic information based on the damping curve. The device also calculates a ratio of quantities of change of relative speed of two links whose road types change as a speed change similarity ratio and estimates traffic information of the link of a second road type from known traffic information of the link of a first road type by using that ratio. |
申请公布号 |
US8145414(B2) |
申请公布日期 |
2012.03.27 |
申请号 |
US201113232454 |
申请日期 |
2011.09.14 |
申请人 |
FUSHIKI TAKUMI;YAMANE KENICHIRO;KATO MANABU;AMAYA SHINICHI;XANAVI INFORMATICS CORPORATION |
发明人 |
FUSHIKI TAKUMI;YAMANE KENICHIRO;KATO MANABU;AMAYA SHINICHI |
分类号 |
G08G1/00 |
主分类号 |
G08G1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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