Replication strategies for peer-to-peer based multimedia distribution service

Peer-to-peer based multimedia distribution service draws great attention in recent years. In order to improve system performance and provide high service availability, we propose a hierarchy replication strategy based on the topology-aware overlay, which can achieve the scalable and QoS-awareness. Specifically, we propose two distributed heuristic replication strategies: inter-group replication and intra-group replication, both strategies are simple and based on theoretic analysis. Simulation results show that, the latency in our proposed scheme is up to 20% less than that of the FreeNet and up to 50% less than that of the randomly replication system.