| 摘要 |
From a mobile communication device (12), road information (RI) about either a preliminarily registered point or an arbitrary point on a route from a present position to a destination is transmitted to and received in a network navigation center (10) via a cellular phone base station (14) and a general telephone network (16). Based on that road information RI, the network navigation center (10) retrieves traffic information (TI) about the registered point or the arbitrary point on the route, and then transmits the retrieved traffic information (TI) to the mobile communication device (12) via the general telephone network (16) and the cellular phone base station (14). The traffic information (TI) is comprised of traffic congestion area data about the registered point or the arbitrary point on the route, which displayed on a display (43) in the mobile communication device (12); whereby the user is informed of future traffic information like traffic congestion. <IMAGE> |
