| 摘要 |
A portable information terminal 201 is connected through a radio base station and the like to an Internet 204. Furthermore, a music server 205, a mail server 206 and a distribution server 207 is connected to the Internet 204. The distribution server 207 distributes data stored in the music server 205 and mail server 206. The distribution server 207 includes a distribution data store memory 209 in which data for the distribution is transiently stored and a radio unit 210 which wirelessly distributes data to the portable information terminal 201. When accesses are concentrated on the music server 205 from the distribution information terminals 201, the music server 205 transfers a file including music data to the distribution server 207. The distribution server 207 wirelessly transfers the file to each of the portable information terminals 201 with temporal dispersion. Employing above structure, even if the accesses for the communications are transiently concentrated on the particular apparatuses such as the server, it is possible to obtain the communication system which can avoid the occurrence of the overload condition.
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