Research On Key Technique Of Media Distribution System Based On P2P In IPv4/IPv6 Network

With the development of Internet, network has greatly changed people's life. There are numerous types of data transmitting on the network, which demands new data transmitting technology and promotes the development of media distribution system. P2P (Peer to Peer) is an overlay network built on Internet. It differs from traditional C/S mode. A peer in P2P can receive resource from other peers and share its resource with others. P2P technology has shown great advantage on media data distribution. The media distribution system based on P2P gradually becomes research hotspot.In existing P2P mode, an IPv6 peer cannot communicate with IPv4 peers which are majority in P2P system. Only we do a solid study on'P2P communication in IPv4 and IPv6 coexistence network, we can promote media distribution system based on P2P. With the development of P2P media distribution technology, the piracy is becoming a big problem. Only the media distribution system is supported by the DRM (Digital Rights Management) system, we can prevent the copyright pirate, so as to promote the healthy development of Internet.In this paper, we firstly investigate the IPv6 transition mechanisms. Combining the IPv6 transition mechanisms and P2P communication mechanism, we propose a P2P communication mechanism based on request forwarding in IPv4 and IPv6 coexistence network. In this method we use Dual-Stack technology on P2P system, which using a Dual-stack node as a forwarding node to spread the resource in the whole P2P network. This paper implements this P2P communication mechanism with the OMNET++ simulation platform and evaluates the performance of the proposed mechanism. The research shows the proposed mechanism can effectively solve the communication between IPv4 peer and IPv6 peer in P2P network and keep the system performance stable.In this paper, we analyse the P2P media distribution system and DRM system, and then research the combine method of the two systems above mentioned. With the related experiments, we propose the selective encryption mechanism and the information hiding technology which can be used in the DRM system. With the research above mentioned, we design DRM system based on selective encryption mechanism in P2P media distribution system. Finally, this paper implements the copyright management subsystem within the P2P media distribution system. And then we do the functional tests to verify the validity of the application of these technologies.