基于语义路由的P2P信息检索  

Peer-to-Peer Information Retrieval Based on Semantic Routing

作　　者：叶春[1] 葛燧和[1] 熊齐邦[1] 

机构地区：[1]同济大学计算机科学与工程系,上海200331

出　　处：《计算机仿真》2004年第10期143-145,共3页Computer Simulation

摘　　要：高效、稳定的P2P信息检索机制已经成为了研究的热点。现有的搜索方法包括使用广播方式或者分布式哈希表。基于分布式哈希表的方法虽然可以获得很好的查询性能,但是不支持近似查询,区间查询、而使用广播方式效率又低,引入语义路由,能很好地解决这些问题。语义路由是一种对广播搜索进行修剪的方法,将查询请求有选择的发送给能响应请求的节点。论文中介绍了语义路由机制,提出了基于该机制的P2P检索系统体系结构,最后使用NeuroGrid进行了仿真,实验结果显示使用语义路由可以提高查询效率。Efficient and stable information retrieval mechanism has been the hot of this research area. The existing search technologies include flooding messages or Distributed Hash Table(DHT). Although, schemes based on DHT can provide good search performance, they don′t work for approximate, range queries. And flooding messages cause low efficiency. Using semantic routing mechanism can solve these problems well.Semantic Routing is a method of pruning a flooding search such that queries are preferentially forwarded to nodes that can answer those queries. This paper introduces semantic routing, and presents a P2P search system infrastructure based on it. At last, simulation using a NeuroGrid simulator is done and the result shows that using semantic routing can improve search efficiency.

关 键 词：语义路由 P2P信息检索 点对点网络 分布式哈希表 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]