| 摘要 |
PROBLEM TO BE SOLVED: To cope with all communication requests while a vehicle passes the communication area of a radio base station when the vehicle side has a plurality of transmission requests. SOLUTION: A route between the starting place of a vehicle and the destination is searched. At the same time, a communication requesting section 82 prepares a content the communication of which is requested from the vehicle side before the vehicle enters a communication area with a radio base station regardless of whether a navigation function for guiding a route according to the searched route is operating. When the vehicle enters the communication area, a route identification section 83 determines an estimated route where the vehicle passes the communication area and the passage distance of the communication area when driving the estimated route identified by the route identification section 83 is calculated by a passage distance calculation section 84. The distance calculated by the passage distance calculation section 84 is distributed into a plurality of portions according to the number of communication requests N. A content the communication of which is requested is communicated within distance distributed by a communication allocation section 85. While the vehicle passes the communication area, its all communication requests are coped with. COPYRIGHT: (C)2010,JPO&INPIT |
