| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a radio data communication system which can improve the use efficiency of a communication line by seleching a communication line for packet switching or a communication line for line switching. SOLUTION: A data communication terminal 1 is connected to the other data communication terminal 9 through a communication line for packet switching composed of a data communication device 2, a mobile station 3, a base station 4, a mobile communication network 5, router devices 61 and 71, a data processor 10, and a LAN 8. When data that both data communication terminals 1 and 9 communicate to each other increase in amount, the data communication terminal 1 switches the line to a communication line for line switching composed of a data communication device 11, a mobile station 12, a base station 13, a mobile communication network 14, a digital network 15, a data communication device 16, the data processor 10, and the LAN 8 and communicates data to the data communication terminal 9. When the amount of data decreases through this connection, the line is switched to the communication line path for packet switching of the mobile station.</p> |
