Clock Synchronization of Wireless Sensor Networks
Clock Synchronization of Wireless Sensor Networks
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DOI：
10.1109/msp.2010.938757
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发表时间：
2011-01-01
影响因子：
14.9
通讯作者：
Serpedin, Erchin
中科院分区：
文献类型：
--
作者：
Wu, Yik-Chung;Chaudhari, Qasim;Serpedin, Erchin
时钟同步是无线传感器网络（WSNs）运行中的一个关键组成部分，因为它为不同的节点提供了一个共同的时间帧。它支持融合来自不同传感器节点的语音和视频数据、基于时间的信道共享以及协调睡眠唤醒节点调度机制等功能。早期对无线传感器网络时钟同步的研究主要集中在协议设计上。然而，时钟同步问题本质上与参数估计有关，最近，通过采用统计信号处理框架开始出现对时钟同步的研究。本文从信号处理的角度综述了无线传感器网络时钟同步的最新研究进展。这篇文章说明，许多建议的时钟同步协议可以解释和他们的性能评估使用常见的统计信号处理方法。它还表明，先进的信号处理技术，使最佳的时钟同步算法的推导具有挑战性的情况下。
Clock synchronization is a critical component in the operation of wireless sensor networks (WSNs), as it provides a common time frame to different nodes. It supports functions such as fusing voice and video data from different sensor nodes, time-based channel sharing, and coordinated sleep wake-up node scheduling mechanisms. Early studies on clock synchronization for WSNs mainly focused on protocol design. However, the clock synchronization problem is inherently related to parameter estimation, and, recently, studies on clock synchronization began to emerge by adopting a statistical signal processing framework. In this article, a survey on the latest advances in the field of clock synchronization of WSNs is provided by following a signal processing viewpoint. This article illustrates that many of the proposed clock synchronization protocols can be interpreted and their performance assessed using common statistical signal processing methods. It is also shown that advanced signal processing techniques enable the derivation of optimal clock synchronization algorithms under challenging scenarios.