一种无线传感器网络中汇聚节点的本地时钟和传感器节点的RTC时钟同步校准的方法

发布时间：2018-03-02 14:42

本文选题：休眠状态　切入点：RTC时钟　出处：《计算机科学》2017年02期 　论文类型：期刊论文

【摘要】：为了降低传感器节点的功耗,应尽可能地让传感器节点在没有业务需求时进入休眠状态。由于传感器节点进入休眠状态后只有RTC时钟模块在运行,且RTC模块内部晶体振荡器受温度等因素的影响较大,造成RTC时钟精度不高进而可能会导致传感器节点不能准确地在预设的时间被自动唤醒,无法完成与汇聚节点的通信业务。为此,提出一种新的无线传感器网络中汇聚节点的本地时钟和传感器节点的RTC时钟同步校准方法,该方法摒弃了以往直接对传感器节点内部RTC模块的晶体振荡器进行温度参数补偿的做法,并由传感器节点根据汇聚节点的本地时钟来调整自己的RTC时钟,以便传感器节点和汇聚节点的时钟动态地保持一致。
[Abstract]:In order to reduce the power consumption of sensor nodes, the sensor nodes should be kept dormant when there is no business requirement. Because only the RTC clock module is running after the sensor nodes are dormant. The internal crystal oscillator of RTC module is greatly influenced by temperature and other factors, which result in the low precision of RTC clock, which may lead to the sensor node not being automatically awakened accurately at the preset time. This paper presents a new method for synchronizing the local clock of the convergent node and the RTC clock of the sensor node in wireless sensor networks. In this method, the temperature parameters of the crystal oscillator of the RTC module inside the sensor node are compensated directly, and the sensor node adjusts its own RTC clock according to the local clock of the convergent node. The clock of sensor node and sink node is dynamically consistent.
【作者单位】：上海无线通信研究中心;南京邮电大学;中国科学院上海微系统与信息技术研究所;
【基金】：国家自然科学基金:基于车流量与3D信道建模的车联网连接性理论研究(61471346) 国家科技重大专项:新一代宽带无线移动通信网(2014ZX03001024) 上海市自然科学基金:基于真实车流量建模的车联网连接性理论研究(14ZR1439700)资助
【分类号】：TP212.9;TN929.5

【参考文献】