无线传感器网络能量有效的实时查询处理方法

实时性和能量有效性是战争、抢险救灾等无线传感器网络系统应用的重要指标,因而提出了在查询截止期内,访问节点数目最大化,同时尽可能减少能量消耗的方法.此方法提出了松弛时间和数据传递模式的概念,并利用松弛时间计算跳步数的门限值,对比节点的不同路由方式的跳步数和门限值的关系,从而确定节点的数据传递模式,制定有效的实时查询计划的查询处理方法.仿真实验证明,利用这种查询处理方法能够有效的提高在截止期内查询的准确度和减少查询所需能量.

Energy-efficient Real-time Query Processing Approach in Wireless Sensor Networks

Real time and energy efficiency are important metrics for some applications such as military and emergency in wireless sensor networks.An approach to maximize the node-accessed amount and minimize the energy cost within the query deadline is proposed.The concepts of Slack Time and Data Delivery Mode are raised to make an effective query plan for real-time queries.At first it computes out the hop thresholds based on the Slack Time and compares the hop counts in the node's routing tables with the thresholds,then decides data delivery mode for each node.The simulation experiments prove that the query processing approach is valid on the accuracy and energy consumption for real-time query.