Multicast Techniques for Personalized Media Stream Delivery(Network Architecture)(Special Issue on Collaboration Art and Network Entertainment)

概要

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This paper describes multicast techniques for a network distribution method designed to accommodate an innovative broadcast content delivery service that provides temporally and spatially personalized video/audio contents. Although multicasting is unsuitable for on-demand distribution and heterogeneous media distribution via real-time streaming transfer, we are attempting to use it to achieve effective network resource utilization. As far as we are aware, this has not been previously attempted. We consider two multicasting techniques - asynchronous and layered multicasting - and describe how we have improved them for this purpose, and developed two new theoretical methods. One is a statistical traffic-control algorithm based on asynchronous multicasting that enables flexible bandwidth control to meet the network bandwidth design requirement while reducing the use of a receiver's buffer memory. The other is a multicast technique for the delivery of diverse media segments/objects, which is based on a layered multicast technique that manages the fewest possible multicast groups through cooperative asynchronous multicasting. To demonstrate the implementability of these two methods, we describe a network design that uses the latest Internet technologies. We also discuss the effectiveness of this scheme for traffic reduction on the basis of a numerical analysis and simulation results.
一般社団法人情報処理学会の論文
2003-02-15