首页>
外国专利>
A server device, an in-vehicle terminal device, and program of communication-based car navigation system
A server device, an in-vehicle terminal device, and program of communication-based car navigation system
展开▼
机译:服务器设备,车载终端设备以及基于通信的汽车导航系统的程序
展开▼
页面导航
摘要
著录项
相似文献
摘要
The invention relates to a communication-based navigation system, wherein even when a vehicle deviates from an original guidance route, an in-vehicle terminal device (1) can locate a new guidance route and display the same without receiving another guidance route delivered from a server device (4). Immediately after searching for a guidance route which is displayed at the start of running, the server device (4) finds data on the shortest route from each node to a destination (direction data (423) to return to the original route) in accordance with a shortest path algorithm, and delivers this data to the in-vehicle terminal device (1) together with delivery map data (424) including the guidance route. When the vehicle deviates from the guidance route, the in-vehicle terminal device (1) locates a new guidance route or a return route from the location at which the vehicle deviates based on the direction data (423) to return to the original route, and displays the guidance route or return route.
展开▼