The Research Of Semantic Overlay Network Based On Chord Algorithm

As a new network compute mode,P2P(peer-to-peer)network modifies the traditional C/S mode and has been used more and more popularity.The information amount rose rapidly with the intense increment of both users'quantity and network'S scale and caused a serious problem,difficulty in searching,locating and retrieving resource.Another intelligent network become a trend,more people want to be able to network anthropomorphic,logical,capable of the most accurate and efficient way to obtain resources.Efficient use of P2P network connection performance combined with intelligent query algorithm to achieve.So to conquer this problem,information retrieval in P2P network is a pivotal technique.A good strategy not only increases hit ratio and decreases node load and network cost,but also serves for users in studying relevant information to improve the performance in later search process and save time,and make the network more intelligent,more efficient use of resources for the user's Web experience to provide more quality services.On account of the more expenses on searching of unstructured P2P networks,and the limitation of matching keywords by Distributed Hash Table in the unstructured P2P networks,this paper based on route theory of structured P2P networks,according to the requency of keywords's apperance in documends to calculate the similarity and compare with the host-peer.it propose Structured P2P networks based on the Chord,a traditional algorithm of p2p routing protocol,additional conception of semantic hash table is added in,the node of resource to quantify semantic,and calculate semantic similarity to find the resource.This new Semantic Overlay Network based on the original topology is joined the efficient semantic matching.It provides a high performance of network organization structure query for the p2p network.This structure makes full use of the advantages of structured P2P networks,to solve the inefficiencies search of topic group in overlay network,and overcome the shortcoming of structured P2P networks only supports accurate matching search.It provides reliable and efficient semantic query mechanism for structural P2P network,greatly improve the recall-precision.