Multi-Collaboration Domain Multicast P2P Delivery Architecture for VoD System

Although a P2P scheme based unicast forward or application level multicast (ALM) is able to decentralize the video delivery process to reduce the VoD server load, the performance of such a scheme is limited by the high network resource requirement of the clients´ communications. In this paper, we propose a new P2P architecture that uses multicast communications for peer collaborations. We introduce the concept of n-peers to m-peers cooperative collaboration to achieve high client delivery efficiency as well as unbounded scalable client collaboration capacity. Furthermore, the architecture selects peers by taking into account the underlying network infrastructure in order to avoid network saturation. We compared the new design with video delivery architecture based on Patching and Chaining schemes in a synthetic network model as well as a real Ethernet network topology. The experimental results showed that our design is better than Patching and Chaining in terms of admitted client requests and VoD server resource requirement. Furthermore, the results showed that our architecture is adaptable to any underlying physical networks.