The delivery of Video-On-Demand (VoD) contents is one of the leading services that occupies most of the Internet traffic with tendency to dominate in the years that come. Although it offers a great convenience to the users, it is a serious burden for the privately managed networks which have to process huge amounts of traffic meeting high levels of quality of service. This high traffic-demanding service not only requires higher number of network devices and streaming servers, but also demands high energy consumption which is costly for the network operator and harmful for the environment. Therefore, in this paper, we analyse the energy consumption of a VoD delivery system where the clients partially participate in the streaming and thus significantly reduce the overall traffic in the core of the privately managed network. We show that the the peer-assisted VoD streaming significantly makes the VoD delivery greener service since it reduces the energy consumption both by the network operator and the clients.
Energy consumption, Video-on-Demand, P2P, Streaming