Research On Key Technology Of P2P Streaming Content Delivery And Service

With the dramatic development of computer technology and the wide deployment of broadband network,the streaming media application gains great popularity.The latest data from the internet statistics show that among 210M internet users of China, about 80%users enjoy network audio and network video services.Streaming media application thus becomes the main application nowadays.As streaming media requires high bandwidth,long duration and strict QoS,it poses a great challenge for researchers to develop a large-scale capable,cost-effective,robust,safe,QoS guaranteeing,friendly-to-ISPs streaming content delivery and service system. Compared with the traditional server centric model and CDN model,P2P has more distinct features.As there are many issues of problem,P2P streaming is still an active research area with many challenging problems to be addressed.For example,peer dynamicity management,peer heterogeneity,efficient overlay construction,peer scheduling and content safety.This dissertation focuses on the P2P streaming content delivery and services,the main contributions are as follows:1.A novel P2P VoD scheme-KadStreaming is proposed.KadStreaming uses mesh-based overlay network and innovated DHT to realize locality awareness and nearby service,it efficiently improves the performance of the system.According to the Peer selection,a QoS incentive global capacity growth first model is put forward.By comparing the capacity of peers,the peers negotiate to provide or get services,the high capability is more likely to get high priority and thus enhance the capacity of the whole system.2.A social behavior based hierarchy-mesh P2P live streaming scheme(HimP2P) is put forward.HimP2P uses hierarchy-mesh overlay network,it supports many to one service model and then has less delay and more robustness.Him will optimize the overlay network by promoting the high capacity peer node,and then benefit the whole system.3.A novel scheme of hybrid P2P streaming system—PeerCDN is proposed. PeerCDN inherits the both excellent features of P2P and CDN system.It makes full use the CDN large amount of hardware/software investment,by using P2P technology,the effect of content delivery among the original server and cache servers was greatly improved.At the same time,by the coordination of cache server,the client Peers' resource is aggregated.To prevent the system from content pollution attack,an immunity algorithm is proposed.By using the distributed active check and centic polited isolation,the peers are protected from content pollution.4.A web-service based loosely-coupled content alliance framework is presented. The framework integrates the small-scale,isolated content providers together.It suggests an extended-UDDI registration and search platform,and a XML-based information exchange standard.It makes easy to share content with each other and will be conducive to content industry.As a novel approach of streaming media content delivery and service,P2P streaming enjoys good commercial value because it attracts both the service provider and the end-users.This dissertation's research provides a sound theory and practicial foundation and helps the development of P2P streaming.