Multicast and Peer-to-Peer (P2P) are two common transmission strategies to provide scalable and cost efficient solutions for Video-on-Demand (VoD) services. It is noted that a native P2P mechanism requires small server resources and provides an insensitive delay to users. However, the bandwidth requirement inside the network is rapidly increased when more customers joins the video session. On the other hand, if the system simply uses a multicast scheme to deliver the video, the customers have to wait for a noticeable delay before watching the videos whereas the overall bandwidth requirement will not be significantly increased. In this paper, a new transmission policy denoted peer-to-peer batching (PPB) policy is proposed to exploit the multicast capability of the network and P2P paradigm to efficiently deliver video data to the clients. Our analysis shows that the proposed PPB scheme achieves better system performance when compared with Patching (a native multicast system) and DirectStream (a native P2P system).
To support large-scale Video-on-Demand (VoD) services, many transmission schemes such as data broadcasting and proxy caching have been developed to minimize the resources requirement and enhance the system scalability. However, most of the previous works mainly focused on providing the VoD services in a homogeneous environment. In this paper, we investigate a feasible solution for building an efficient hierarchical VoD system using proxy caching coupled with broadcasting and appropriate coding schemes in heterogeneous environment so as to minimize the system transmission cost. By developing a performance model in this paper, system designers can study how various techniques for VoD can be organized to maximize the efficiency of the system. From the results, it can be seen that the system performance can be greatly enhanced by efficiently coupling various techniques.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.