【作者】 乔群； 李建中； 李贵林； 石胜飞；

【Author】 Qiao Qun,Li Jianzhong,Li Guilin,and Shi Shengfei (School of Computer Science and Technology,Harbin Institute of Technology,Harbin 150001)

【机构】 哈尔滨工业大学计算机科学与技术学院；

【摘要】 以数据为中心的存储方法(DCS)是为了解决无线传感器网络的能量问题而提出的一类分布式数据存储方法.这类方法的设计过程中必须解决由于大量数据同时向某个存储节点传输而导致的节点负担过重的问题(热点效应).目前在DCS方法中提出的热点效应解决方案大多导致了查询所耗费能量的增加.对此提出了一种均衡能量的以数据为中心的存储方法(PBDCS).该方法不仅可以有效地缓解热点效应,而且可以更好地达到节省能量和提高查询速度的目标.分析和实验结果表明,该方法可以有效地在传感器网络环境中运行,并且比同类方法在查询时消耗的能量减少了40%以上,查询速度增加了30%以上.更多还原

【Abstract】 Data-centric storage method(DCS) has been proposed as an energy-efficient data dissemination technique in wireless sensor network.The design of DCS contains the solution to the significant-load problem of a node when too much data rush to it at one time(the hotspot problem).But most solutions to the hotspot problem before lead to the increment of power wasted in query process.A Power-balanced datacentric storage method is designed in this paper,which not only can reduce the over-load conditions caused by hotspot problem,but also can achieve good efforts on power saving and query speed improvement.The analysis and experiments show that PBDCS can work effectively in the wireless sensor network,and that this new method reduces the power cost by query by at least 40%and increases the speed of query by at least 30%compared with the methods before.更多还原