Proxy Caching for Video on Demand Systems in Multicasting Networks

Streaming high quality videos consumes a significant amount of network resources. Researchers proposed prefix caching schemes to reduce bandwidth usage costs in streaming videos. In this paper, we introduce a wide-scale cost model for proxy caching that takes bandwidth consumption into consideration over an entire network for different multicasting tree topologies. The new cost model quantifies the overall usage of network resources more accurately. We have also investigated the feasibility of prefix caching at proxies in multicasting networks, and, contrary to a recent claim, found out that prefix caching is cost effective in a wide range of different network conditions and service request rates.