Hybrid Dynamic Tree/Mesh Overlay for P2P Streaming
Application layer overlay have emerged as the most promising solution for P2P Streaming on the Internet.The overlay is a very critical component in this system.It influences the image quality directly.There are mainly two kinds of overlay:tree and mesh.However,there are internal weaknesses in both these overlays.In the tree overlay,data loss rate is very high.In the mesh overlay,transmission delay is very large.In this paper,we propose a hybrid dynamic tree/mesh overlay which combines merits of tree and mesh overlay.In this hybrid overlay,we dynamically allocate descriptions to parent nodes,changing the trees into dynamic trees which can adapt network bandwidth fluctuation.Simulations show that our hybrid overlay can overcome the weaknesses of tree overlay and mesh overlay,adapt node dynamics and network bandwidth fluctuation,decrease data loss rate and diminish transmission delay.