混合传感器网络中基于事件的位置相关查询

摘要

在混合传感器网络中,传感器移动性使得查询区域产生动态变化.针对动态查询区域内的数据聚集查询难以有效处理的问题,提出了一种基于事件的位置相关查询(ELAQ)处理方法,它包括查询分发算法、最大距离投影代理选择算法、网络内查询传播和聚集算法.ELAQ模型的特点是查询由事件触发,查询结果依赖于移动传感器的位置.实验结果显示,相比TinyDB查询处理方法,该方法提高了查询结果准确率,缩短了查询响应时间.%In the hybrid sensor network, the mobility of sensors creates dynamic changes of query areas. Aiming at the problems that data gathered inquires in the dynamic inquires areas can not be handled effectively, this paper puts forward a processing method based on the location of the events related query (ELAQ). It includes the query distribution algorithm, the maximum distance projection agent selection algorithm, query propagation in network and aggregation algorithm. The model of ELAQ has the character that it is triggered by events inquires, and the results of inquires depend on the position of moving sensor. The results show that, compared with the TinyDB query processing methods, this method increases the search results accuracy, and shortens the response time of inquires.