| 摘要 |
A subscriber terminal ms sends the demand including at least information for identifying the demand subscriber terminal and information for identifying the requested information to the information distribution transmission center HE through the going-up line. The information distribution transmission center HE makes a transmission plan of the information based on this demand, and sends the information transmission plan to the subscriber terminal ms prior to the actual information transmission. The subscriber terminal ms sends an information transmission request including a share information transmission request of the transmission information when desired transmission information is listed in the obtained transmission schedule. The information transmission center HE transmits the information requested according to the information transmission schedule to the subscriber terminal which made the information transmission request and, during a share information transmission request, transmits the information also to the subscriber terminal which made the share information transmission request. A video on-demand system can be realized with a relatively small investment, and the centralization of traffic is mitigated, the network resource is used efficiently, and rational charging for information transmission is enabled.
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