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Vehicle navigation system and method
| Details |
Inventors: Takagi, Toru; Honda, Naoki;
Assignee: Nissan Motor Co., Ltd. (Yokohama, JP)
Primary Examiner: Cuchlinski, Jr.; William A.
Assistant Examiner: Mancho; Ronnie
Attorney, Agent or Firm: McDermott, Will & Emery
A vehicle navigation system and method in the present invention comprises a navigation apparatus transmitting a current position of a vehicle and a target destination of the vehicle, and a base station receiving the current position and the target destination, searching a route information from the current position to the target destination, and transmitting the route information to the navigation apparatus. The base station includes an information storage section storing added information with regard to road features, a route searching section searching the added route information from the information storage section, a transmitting section transmitting the route information to the navigation apparatus and then transmitting the added information to the navigation apparatus. The navigation apparatus displays the route information and the added route information each of which is transmitted from the base station. |
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DETAILED DESCRIPTION According to an investigation made by the present inventors, in a vehicle navigation system of the past, because only a recommended route is transmitted to the vehicle, there can occur discrepancies between the display screen and the actual road, so that it is possible to veer from the recommended route and follow the deviated road.
As a countermeasure with respect to the above-noted problem, a system can be envisioned in which, in addition to the recommended route from the base station, road map data is also transmitted from the base station.
In the above-noted case, however, because of the limitations in circuit capacity normally imposed on mobile communication, the time required for transmission becomes long, and also there can be interruptions of the circuit during the transmission.
In the case in which the circuit is interrupted during communication, it is necessary to restart the series of data to be transmitted from the beginning, this representing a drop in communication efficiency.
Accordingly, the present invention was made in consideration of the above-noted drawbacks, and has as an object to provide a vehicle navigation system and method which seek to improve the faithfulness of the display screen with respect to the actual road, and which also provide an improvement in communication efficiency.
A vehicle navigation system according to the present invention comprises a navigation apparatus transmitting a current position of a vehicle and a target destination of the vehicle, and a base station receiving the current position and the target destination, searching a route information from the current position to the target destination, and transmitting the route information to the navigation apparatus.
The base station includes an information storage section storing map information and added information with regard to road features, a route searching section searching the added route information from the information storage section, a transmitting section transmitting the route information to the navigation apparatus and then transmitting the added information to the navigation apparatus
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