Research On The Selection Of Super Node In Peer-to-Peer Network

With the rapid development of computer network and communication technology, users have been storing more and more valuable contents in their own computers, and it has led to the change of contents storage center from the core of Internet to the end users. Thus, the exchange model of Internet contents has also changed from traditional Client/Server model to peer-to-peer model, that is, P2P network. Generally speaking, P2P network means the overlay network above the current Internet. Each peer in the network is both the service provider and the service demander. P2P technologies are the research focuses of network academic community and the hot topics in industry.Although P2P network has been widely and successfully used, there are many problems to research. This paper researches the super node selection solutions in P2P network to improve user's satisfaction degree and performance of the network, considering the heterogeneity of users'requirements and the adaptable problems of different physical network.First, this thesis introduces the basic concept, characteristics and applications of P2P network, and in-depth analysis of the heterogeneous requirements of different users and the adaptability in wireless network environment. By discussing the advantages and disadvantages of various type of P2P network topology and analyzing the problems to semi-structured P2P network, the research idea about the physical network characteristics and users adaptability based topology construction is proposed.In order to build a semi-structured P2P network topology and address the different needs of users for services provided by P2P network, this thesis proposed an user's requirements adaptive super node selection mechanism. In this mechanism, firstly establish the performance parameters set representing different indicators, and then users give a corresponding bias based on subjective preferences, in order to build the weight of the parameter set. According to the input, a hierarchical analysis model of super node selection is built. Finally, the decision-making policy of super node selection for various users based on AHP is proposed.In addition, this thesis surveys the problems of the P2P network when deploying in the wireless network. Aiming at the heterogeneity of nodes in wireless mesh network and the characteristic that the transformation performance in multi-hop network is seriously affected by the number of hops, the super node selection mechanism based on the physical network characteristic of wireless MESH network. In this mechanism, the role and position of the nodes of wireless MESH network are considered, and the"MESH sub-domain"is also established. On the basis of building a super node cluster of services to ensure the short hop of nodes inside the cluster, and guaranteed end-to-end transmission delay of applications.Aiming at the problems of P2P network, such as heterogeneity of service requirements and physical network, and focusing on the super node selection when building p2p network, the super node selection mechanisms adaptive to the features of user requirements and physical network are proposed. Based on two different perspectives, the protocol of P2P network building is optimized. This has presented a brand new perspectives and bright future to solve the problems in P2P network topology building.