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无线传感器网络中基于消息预取的移动查询技术
引用本文:张细政,胡忠望,肖建华,何宏.无线传感器网络中基于消息预取的移动查询技术[J].计算机应用,2006,26(11):2531-2535.
作者姓名:张细政  胡忠望  肖建华  何宏
作者单位:1. 湖南工程学院,计算机科学系,湖南,湘潭,411101;上海交通大学,微纳科学技术研究院,上海,200240
2. 湖南工程学院,计算机科学系,湖南,湘潭,411101
基金项目:湖南省自然科学基金;湖南省教育厅资助项目
摘    要:无线传感器网络技术所面临的关键问题之一是解决向终端用户提供传送信息的数据服务问题。提出了一种移动环境下满足时间空间约束的数据查询处理技术,结构上由代理体和网络节点两层组成,其中网络节点执行消息预取、查询扩散和数据收集处理功能,通过对用户的运动路线进行预测并向传感节点发出预取消息,由节点自主构建网络查询树,再由数据集中组件完成数据的收集和融合,用户在到达传感区域后能在查询周期结束前获取查询数据。仿真结果表明,该技术能保持良好的数据完整性和高的数据服务质量,并且比IEEE802-11的PSM模式多消耗不到24%的能量。

关 键 词:无线传感器网络  移动查询  消息预取
文章编号:1001-9081(2006)11-2531-05
收稿时间:2006-05-09
修稿时间:2006-05-092006-06-26

Technology of Mobile Querying Based on Message Prefetch for Wireless Sensor Networks
ZHANG Xi-zheng,HU Zhong-wang,XIAO Jian-hua,HE Hong.Technology of Mobile Querying Based on Message Prefetch for Wireless Sensor Networks[J].journal of Computer Applications,2006,26(11):2531-2535.
Authors:ZHANG Xi-zheng  HU Zhong-wang  XIAO Jian-hua  HE Hong
Affiliation:1. Department of Computer Science, Hunan Institute of Engineering, Xiangtan Hunan 411101, China; 2. Research Institute of Micro/Nano Science and Technology, Shanghai Jiao Tong University, Shanghai 200240, China
Abstract:A data query processing scheme called "Mobile-Query" was developed as well as its system architecture and query model. The scheme was made of proxy nodes and network nodes. Just in time mechanism was adopted to transmit prefetching message to sensor nodes for initializing query tree and re-scheduling nodes-sleep periods before user reaching, therefore, query result could be sent back to user before the end of query period. The theoretical analysis and simulation based on NS-2 show that this scheme has good data integrity and high data service quality, and it costs 24% energy more than that of PSM scheme in IEEE802.11.
Keywords:wireless sensor networks  mobile query  message prefetehing
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