Research On A Smart Qos Driven And Personalize P2P IPTV System

Over the last decade, the Internet protocol (IP) based multimedia applications are growing tremendously and becoming the killer applications. Most of them are implemented as the client/server architecture with proprietary protocols; these centralized systems always have the scale issue as the user base continues to grow due to the bandwidth and storage space bottleneck of the servers. Comparing to the centralized server-client mode content distribution systems, the peer-to-peer based content sharing systems are emerging as the cheaper and more flexible solutions because every peer contributes its storage and uploading bandwidth while getting data.The P2P swarm technologies have been shown to be very efficient for large scale content distribution systems in the last few years, such as the file sharing applications. However it is still an open topic about how to deploy the P2P paradigm for the real time video broadcasting (RTVB) and video-on-demand (VOD) applications due to the more stringent restrictions for startup time and packet loss ratio. There are still lots of open topics on startup time performance, playback jitters, quality of service (QoS) and personalize customization at P2P streaming reseaches.In this paper, a P2P framework named SmartPeerCast TV (SPTV) is proposed to increase the user experience and QoS of P2P VOD and RTVB application by the new P2P overlay, data caching and QoS algorithms proposal.(1) The SPTV proposal designs a new P2P media streaming application:eMule based Playing-As-Downloading (ePAD). In this paper, a new algorithm-Wish Driven Chunk distribution (WDCD) is designed for ePAD system, which enables the eMule P2P file sharing system to support the Video-On-Demand (VOD) function while still keeping the P2P native downloading speed.(2) Besides the P2P VOD application, the SPTV proposal designs an adaptive media broadcasting P2P framework named SmartPeerCast as the video broadcasting sub-system, which employs the media transrating service to control the QoS. SmartPeerCast achieves a network awareness, codec awareness, and high performance RTVB service. SmartPeerCast avoids the bandwidth bottleneck between the heterogeneous peers and fully utilizes the uploading bandwidth of the peers by a new P2P overlay algorithm. The Smart QoS algorithm is designed between the sending and the receiving peers to reduce the receiving peer's playback jitter and implement the incentive mechanism to award the peers who have high uploading contributions.The P2P service framework, VOD and RTVB sub-system of SPTV system are verified by a real deployed service platform over Internet and the simulation experiments at the network simulator. We modify the eMule as the test bed by adding the WDCD algorithm and then verify the ePAD P2P VOD prototype implementation by experiments. The experimental results show that the proposed ePAD system can keep the eMule system high downloading throughput performance with a good playing-as-downloading function. Our experiment results and the real deployment show that SmartPeerCast sub-system of SPTV can eliminate the bandwidth bottleneck and content bottleneck between the heterogeneous peers with a smaller startup time and packet loss for the real time media broadcasting channels, and it is a high performance and medium scale P2P RTVB framework.