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32 15 2006 8 Vol.32 15 Computer Engineering August 2006 · · 2006 A TP18 1, 2 1 2 1 2 1. 4100832512005 SemanticP2P (AAS)AAS (SSN)SSN Searching Scheme in P2P Network Based on Semantic Network and Small-world Theory 1, 2 1 2 1 2 HUO Ying , CHEN Zhigang , MIAO Xuelan , LIU Anfeng , QIU Zhimin (1. College of Information Science and Engineering, Central South University, Changsha 410083; 2. College of Information Engineering, Shaoguan University, Shaoguan 512005) AbstractTo improve the insufficiency of super-peer overlay network, SemanticP2P, a searching model based on semantic network and the small-world theory is put forward. The peers in model are organized in natural area autonomy system(AAS) based on the small-world theory; Super-peers are selected in each AAS based on power law; and super-peers come into being many super-peer semantic networks(SSN). Thus a hierarchical super-peer overlay network is formed. The organization of peers, the constructing of SSN and the scheme of searching are expatiated too. At last the rationality and validity of model are proved by academic analysis and experimental validate. Key wordsPeer-to-peer; Searching scheme; Semantic network; Small world (Peer to Peer, P2P) 1 P2P 1.1 SemanticP2P P2P 1 SemanticP2P,3 P2P