| 摘要 |
A client's terminal 102 carries out the control of data transmission to a server apparatus 101 depending upon a data transmission program involving data transmission control information provided by the server apparatus 101. The server apparatus 101 transmits also a control-information update message to the client's terminal 102. This disperses, in time, the communications to the server apparatus 101. Thus, the server apparatus 101 can be relieved of communication load.
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