An enhanced cache allocation algorithm using threshold-based multicast mechanism for VoD service in IPTV

Abstract

In recent few years, IPTV service has been focused on and actively studied by many service providers. Among the various IPTV service, VoD (Video On-Demand) service is expected to be the most popular service. Currently, most of service providers are trying to provide VoD service by locating proxy nearby end-users because it is hard for a single server to cover all the requests from the entire service area. By doing so, for the provider’s point of view, it can help reduce the server streaming load, for the user’s view point, it can reduce the video startup delay. In spite of many advantages, in server-proxy media streaming architecture, the existing cache management schemes are assuming that the server only uses unicast streaming. If the overall video request rate increases, a significant cost reduction cannot be expected in terms of the entire VoD system. In this thesis, we introduce a multicast-based server-proxy on-demand media streaming architecture and propose an enhanced cache allocation algorithm so that cost reduction of proxy storage and bandwidth saving can be achieved.