Clock Synchronization in Wireless Sensor Networks: Analysis and Design of Error Precision Based on Lossy Networked Control PerspectiveReport as inadecuate




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Mathematical Problems in Engineering - Volume 2015 2015, Article ID 346521, 17 pages -

Research ArticleKey Laboratory of Industrial Internet of Things & Networked Control, Ministry of Education, Chongqing University of Posts and Telecommunications, Chongqing 400065, China

Received 16 November 2014; Revised 15 March 2015; Accepted 16 March 2015

Academic Editor: Tamas Kalmar-Nagy

Copyright © 2015 Wang Ting et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Motivated by the importance of the clock synchronization in wireless sensor networks WSNs, due to the packet loss, the synchronization error variance is a random variable and may exceed the designed boundary of the synchronization variance. Based on the clock synchronization state space model, this paper establishes the model of synchronization error variance analysis and design issues. In the analysis issue, assuming sensor nodes exchange clock information in the network with packet loss, we find a minimum clock information packet arrival rate in order to guarantee the synchronization precision at synchronization node. In the design issue, assuming sensor node freely schedules whether to send the clock information, we look for an optimal clock information exchange rate between synchronization node and reference node which offers the optimal tradeoff between energy consumption and synchronization precision at synchronization node. Finally, simulations further verify the validity of clock synchronization analysis and design from the perspective of synchronization error variance.





Author: Wang Ting, Guo Di, Cai Chun-yang, Tang Xiao-ming, and Wang Heng

Source: https://www.hindawi.com/



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