| 摘要 |
A radio communication system performs radio communication between a terminal station installed on a vehicle and a plurality of base stations provided along a roadside. The system detects a vehicle traveling speed in each communication area formed by each base station. The vehicle traveling speed is detected by a method which uses radio communication between the terminal station and the base stations. The time of the vehicle stay in the communication area is estimated based on the detected vehicle traveling speed, and the length of a packet is determined based on the estimated time of the vehicle stay in the communication area. In this way, the present system performs data transmission using a packet of an appropriate length according to the detected vehicle traveling speed.
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