ROUTE GUIDE INFORMATION DELIVERY METHOD, ROUTE GUIDE METHOD, INFORMATION TERMINAL, AND INFORMATION DELIVERY CENTER

摘要

In response to a request from a vehicle-mounted device (100), a delivery center (200) sends recommended route information and the data size of guide information to the vehicle-mounted device (100). The vehicle-mounted device (100) calculates an estimated download time from the data size of guide information and displays the calculated result. When an occupant requests split downloading, the vehicle-mounted device (100) issues a split download instruction to the delivery center (200). The delivery center (200) sends guide information on a route from the start point to the first guide intersection, to the vehicle-mounted device (100). The vehicle-mounted device (100) downloads the rest of guide information in the background while performing route guide processing.