一种无线传感器网络中基于缓冲区管理的查询处理方法

对于大型无线传感器网络中要求同时支持大量的周期查询和ad hoc查询的软实时应用,提出了一种查询处理方法.设计网络存储结构,为查询处理设置合适的执行区域使其形成查询处理缓冲区,缓冲区内的节点映射了远程节点数据,并使查询和数据在缓冲区汇聚,及时得到处理.基于排队论建立缓冲区中查询任务管理模型,设计其优化策略,得到缓冲区的合适宽度和位置,并基于此设计查询处理算法.实验结果表明,该方法可以降低查询错失率并节约能量.

A Query Processing Approach Based on Buffer Management in Wireless Sensor Networks

A query processing approach based on buffer management is proposed for a mass of periodic queries and ad hoc queries,which are both expected to be supported simultaneously in soft real-time applications in the large-scale sensor networks.With a data storage structure designed in the network,a proper execution region is provided for query processing as a buffer where the nodes are able to map the data of remote nodes and the queries and relevant data both concur,so as to process queries in time.Based on queu...