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arXiv 1602.04706cs.NIstat.AP
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基于异步源时钟频率恢复和反向双向消息交换的无线传感器网络节能时间同步

Energy-Efficient Time Synchronization Based on Asynchronous Source Clock Frequency Recovery and Reverse Two-Way Message Exchanges in Wireless Sensor Networks

Kyeong Soo Kim, Sanghyuk Lee, Eng Gee Lim

摘要:

我们考虑无线传感器网络中的能量有效的时间同步,其中头节点(即,有线和无线网络之间的网关以及数据融合中心)配备有强大的处理器并从插座供电,而传感器节点(即,测量数据并仅通过无线信道连接的节点)在处理和电池供电方面受到限制。正是这种不对称性,我们的研究重点;与大多数现有的计划,以节省所有网络节点的电源,我们专注于电池供电的传感器节点在最大限度地减少时间同步的能源消耗。提出了一种基于异步源时钟频率恢复和反向双向消息交换结合测量数据报告消息的时间同步方案,该方案最小化了传感器节点的消息传输次数,并对测量时间和时钟频率估计的性能进行了分析,给出了后者的下界.仿真结果验证了该方案优于基于传统的双向消息交换与时钟频率恢复和没有测量时间估计的准确性和传感器节点的消息发送和接收的数量作为能源效率的间接措施方面的计划。

英文摘要:

We consider energy-efficient time synchronization in a wireless sensor network where a head node (i.e., a gateway between wired and wireless networks and a center of data fusion) is equipped with a powerful processor and supplied power from outlet, and sensor nodes (i.e., nodes measuring data and connected only through wireless channels) are limited in processing and battery-powered. It is this asymmetry that our study focuses on; unlike most existing schemes to save the power of all network nodes, we concentrate on battery-powered sensor nodes in minimizing energy consumption for time synchronization. We present a time synchronization scheme based on asynchronous source clock frequency recovery and reverse two-way message exchanges combined with measurement data report messages, where we minimize the number of message transmissions from sensor nodes, and carry out the performance analysis of the estimation of both measurement time and clock frequency with lower bounds for the latter. Simulation results verify that the proposed scheme outperforms the schemes based on conventional two-way message exchanges with and without clock frequency recovery in terms of the accuracy of measurement time estimation and the number of message transmissions and receptions at sensor nodes as an indirect measure of energy efficiency.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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