一种事件驱动型无线传感器网络数据抓取策略

An event-driven wireless sensor network data fetching strategy

在事件驱动型无线传感器网络数据抓取中,为了提高ERS算法的效率,对其加以改进,得出一种基于轨迹搜索的事件驱动型数据抓取策略,即通过搜索Sink节点所留轨迹,取代搜索单个Sink节点,以提升搜索成功概率,提高搜索效率,降低数据抓取功耗。在30×30的网格中对所提策略进行仿真,结果显示,当选取合适的点迹信息时效阈值时,相对于原ERS算法,改进后的算法能减小27%的延时,功耗可降低32%。

In event-driven data-collection,the existing communication mechanism based on ERS has poor energy efficiency.In this paper,the data-collection strategy of track searching is proposed for event-driven data-collection cases on the fact that a line is easier to be found than a point.By searching trace of Sink rather than Sink itself,it is easier to find Sink,which can increase searching efficiency and reduce power consumption.A 30×30net is used to simulate power consumption and searching efficiency by this trace-searching method.Simulation results show that once the track information keep aappropriate time,this method can reduce 27% delay and 32% power consumption at the meantime.