Quality-aware multiple backbone construction on multi-interface Wireless Mesh Networks for P2P streaming

In Wireless Mesh Networks (WMNs), users can enjoy the real-time video streaming service anytime and anywhere through the service. Compared to the client/server model, the P2P (Peer-to-peer) approach is more suitable for video streaming applications because of its efficient usage of network resources. However, the multimedia applications are very sensitive to delay time and the performance of packets transmission which is significantly influenced by the co-channel interference. In our approach, we choose the better quality links for routing instead of the minimum hop-count path in MAODV (Multicast Ad hoc On-demand Distance Vector). Then we distribute the video streaming to receivers by using multicasting in multi-channel WMNs, and modify the MAODV routing protocol to construct two disjoint multicast trees as the backbone for the P2P structure. Therefore, we can adopt the MDC (Multiple Description Coding) scheme to encode the video into two independent sub-streams and transmit separately along these trees. Experiment results show that in higher traffic load environment, our scheme is more effective to reduce the latency and improve overall system performance.