随着无线传感器网络的演化发展,其应用领域也越来越广泛。例如现有的公共事业抄表系统、建设中的环境实时监测系统以及未来将实现的工业4.0中智能工厂监控系统,都会利用大量的无线传感器进行数据监测和采集。这些数据监测采集系统通常需要支持远程数据采集和移动端近距离数据采集两种模式。通过采用这两种模式的不同特点,即:唤醒时延的不同需求以及所能够支持的不同的数据传输速率,提出采用混合监听周期这一方法。该方法能够支持实时的数据监测采集,与单一监听周期相比明显降低了监听功耗,延长了传感器节点的工作时间,完全符合移动端近距离数据采集的实时性需求。
With the evolution of the development of wireless sensor networks,its applications are increasingly widespread. For example, existing public utilities meter reading system,the construction of real-time monitoring systems and environmental future 4.0 intelligent industrial plant monitoring system will use a lot of wireless sensor for monitoring and data collection. These data acquisition systems often require monitoring to support remote data collection and mobile data collection. By using different characteristics of these two modes, which are waking the different needs of delays and supporting different data transfer rates, the hybrid method of listening period is proposed. This approach can support real-time data monitoring collection, and significantly reduce power consumption compared with a single listening period and extend the operating time of sensor nodes,in full compliance with the real-time requirements of data collection in close distance for the mobile terminal.