摘要：

基于无线传感器网络(WSN)的智能抄表系统可提高抄表效率,但由于其功耗较大,因此传感器节点通常采用监听-休眠的工作模式以节省电力消耗。针对此工作模式,在手持机抄表应用场景下提出一种WSN快速节点唤醒方法并对系统进行设计。通过提升手持机和传感器节点之间的通信速率降低传感器节点的平均电流。分析结果表明,该方法可有效降低系统的平均电流,并且在较短的监听-休眠周期下功耗节省优势明显,适用于需要即时响应的手持机抄表应用场景。

关键词: 无线传感器网络, 节点唤醒, 低功耗, 高速率, 手持机抄表

Abstract:

Intelligent meter reading system based on Wireless Sensor Network(WSN) can improve efficiency,but it has higher power consumption.Therefore,its nodes need to work under listen-sleep mode to reduce the power consumption.For this working mode,a rapid node wake-up method for WSN is proposed for hand-held meter reading and the system is designed.With the proposed method,higher communication rate is improved between handsets and sensor nodes.As a result,the average current in sensor nodes can be reduced significantly.Performance analysis result shows that the proposed method can reduce the average current.Furthermore,the proposed method yields obvious advantage in saving power consumption when the listen-sleep period is short.Hence,the proposed method is suitable for hand-held meter reading,which generally requires short responding time from sensor nodes.

Key words: Wireless Sensor Network(WSN), node wake-up, low power consumption, high rate, hand-held meter reading

中图分类号: 

• TP393