NAVIGATION SYSTEM, INFORMATION CENTER AND ROUTE SEARCH METHOD
PROBLEM TO BE SOLVED: To provide a navigation system capable of downloading information smoothly, an information center, and a route planning method. SOLUTION: The navigation system 3 acquires information of communication effective area about a plurality of radio communication media at the car, sear...
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Zusammenfassung: | PROBLEM TO BE SOLVED: To provide a navigation system capable of downloading information smoothly, an information center, and a route planning method. SOLUTION: The navigation system 3 acquires information of communication effective area about a plurality of radio communication media at the car, searches a route to a destination by effectively passing through an area which is obtained from the information of communication effective area, and searches the route capable of finishing the downloading of the prescribed information until the car arrives at the destination. Wherein, the route effectively leads to the destination is e.g. the route more passing through the communication effective area in terms of time, or distance, the route less switching the communication connection to the radio communication media 10, or the route etc., requested by the amount of the information obtainable while running. COPYRIGHT: (C)2006,JPO&NCIPI |
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