| 摘要 |
PROBLEM TO BE SOLVED: To prevent new route guidance from being received near a guidance point, even if a route re-search request is transmitted to a route search server, at a fixed period. SOLUTION: A terminal device 20 includes a re-route request means 23 for acquiring a guidance route from the route search server 30 and transmitting a re-search request of the route to the route search server 30 at a prescribed set time interval during the route guidance; a guidance point detection means 24 for detecting the guidance point in the guidance route; a GPS for receiving means 21 for positioning the current position of the terminal device 20; and a re-route request control means 25. The re-route request control means 25, compares a prescribed distance with a guidance point distance from the current position positioned by the GPS-receiving means 21, to the next guidance point detected by the guidance point detection means 24, and inhibits the re-route request from the re-route request means 23, when it is within a prescribed distance range. Within a specific range before the guidance point distance, it transmits the re-route request independently of the re-route request timing. COPYRIGHT: (C)2008,JPO&INPIT |
