传感器网络中的数据查询处理

DATA QUERY PROCESSING IN SENSOR NETWORKS

传统的传感器网络采用集中式数据管理,不能有效利用便宜的本地计算来代替昂贵的网络通信。采用分布式的方法,在sink节点的应用层与网络层之间增加查询代理层,把用户查询分发到相关的传感器节点上进行处理。这样,通过减少网络传输的数据量,来降低传感器节点的能量消耗,延长网络寿命。

Traditional sensor networks rely on centralized system for collecting sensor data, which can＇t effectively make use of cheap local computation instead of costly communication to reduce energy consumption of sensors, This paper focuses on distributed approach. Query proxy layer was added between network layer and application layer on sink node to distribute user queries to all relevant sensor nodes for processing. The distributed approach can maximize network lifetime by reducing transmitted data on network to decrease energy consumption of sensor nodes.