无结构P2P网络自适应资源定位算法

t present , with the continuous expansion of network scale, the resource sharing system of P2P network receives the widespread attention. Resource location as resource contribution system is one of the most important parts, it is of great practical significance to study it .Starting from topological features of unstructured P2P network, based on the similarity of unstructured P2P network and social network, through the analysis of the two characteristics of social networks (small world theory and power-law) influence on the efficiency of resource location of an adaptive resource locating algorithm. The nodes in the network is divided into ordinary node and central node according to their different performances . In order to realize the dynamic change of network node， AHP node selection mechanism is proposed The algorithm can adapt to the highly dynamic unstructured P2P network, maintain the stability of the network effectively, improve the efficiency and accuracy of resource locating.In order to verify the performance of the algorithm, through the PeerSim to simulate the adaptive resource location algorithm and the other three algorithms, record the simulation results, and compared this four algorithms in the search for a delay, network load and the query success rate three aspects.