期刊名称：International Journal of Computer Science and Information Technologies
电子版ISSN：0975-9646
出版年度：2012
卷号：3
期号：6
页码：5351-5355
出版社：TechScience Publications
摘要：In this paper, we study the behaviour of a semantic overlay network that supports full-fledged information retrieval in the presence of peer churn. In a peer-to-peer (P2P) system, nodes typically connect to a small set of random nodes (their neighbours), and queries are propagated along these connections Such query flooding tends to be very expensive. We adopt a model for peer churn, and study the effect of network dynamics on peer organisation and retrieval performance. We propose that node connections be influenced by content, so files will connect to other similar nodes. Our work is the first to demonstrate the issues involved in the design of semantic overlay networks when introducing peer churn. The over-lay network is evaluated on a realistic peerto- peer environment using real-world data and queries, and taking into account the dynamics of user-driven peer participation. (SON). Queries are routed to the appropriate SONs, increasing the chances that matching files will be found quickly, and reducing the search load on nodes that have unrelated content. Using this evaluation, we draw conclusions on the performance of the system in terms of clustering efficiency, communication load and retrieval accuracy in such a realistic setting. Thus, semantically related nodes form a Semantic Overlay Network
