Mr. Irie made a presetation at Technical Meeting in February.
The titles and authours are as follows.

02/14,15 Technical Meeting on Information Networks @Kagawa University

Authours : Kazuki IRIE, Yutaka ARAKAWA, Satoru OKAMOTO, and Naoaki YAMANAKA
Title : A Study on Scheduling and Multicast for Contents Delivery
Abstract : With the growth of high speed networks based on FTTH, the amount of large-size files, such as moviesand music files, transmitted over the Internet has been increasing. However, as the number of the users whdownload large-size files is increasing, the network bandwidth and the processing capabilities of contents servers are inadequate. So there is a possibility that transmitting of high popularity contents will be heavily-loaded and network congestion will occur. We propose a scheduling and multicast method for contents delivery service to reduce the load of contents server and network congestion. In our proposed method, the timing of transmitting contents is force to delay when many users access the large-size contents at the same time. Furthermore, the method of transmitting contents is switched from unicast to multicast and multicast delivery interval is scheduled. Also we evaluate the multicast delivery interval based on the contents size and the number of access by computer simulation and the result shows that the download time is reduced.