Optimal cache partitioning in IPTV network

Abstract

Caching of video content allows reduction of bandwidth and IPTV network cost. In this paper we introduce the concept of content cacheability and present a fast algorithm that uses cacheability to optimally partition a cache between several video services with different traffic characteristics and content sizes. The goal of the optimization is to serve maximum (in terms of bandwidth) amount of subscribers' requests subject to constraints on cache memory and throughput.