Invention Grant
US08554474B2 Reporting of changes in navigation map data for navigation system 有权
报告导航系统导航地图数据的变化

Reporting of changes in navigation map data for navigation system
Abstract:
A method, navigation unit and map update server for updating navigation map data are disclosed. Navigation map update data is received from a navigation unit using mobile communications. The navigation map update data is obtained by detecting the position of a vehicle, calculating a route for the vehicle to a destination using the navigation map data and detecting when the calculated route to the destination is left. If so, the method begins storing position data until the vehicle is back on the calculated route, on a recalculated route to the destination from an actual position, or when it has reached the destination. Furthermore, the method comprises evaluating the stored position data to obtain navigation map update data. Navigation map update data is kept local for a geographically limited area corresponding to an area serviced by a network node in the cellular communication network.
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