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Mathematical Problems in Engineering
Volume 2014, Article ID 237372, 7 pages
Research Article

Control and Optimization of Network in Networked Control System

1College of Electrical and Information Engineering, Lanzhou University of Technology, Lanzhou 730050, China
2School of Control Science and Engineering, Dalian University of Technology, Dalian 116026, China
3Information Technology Department, Shandong Foreign Language Vocational College, Rizhao 276826, China

Received 27 December 2013; Accepted 21 February 2014; Published 20 March 2014

Academic Editor: Ge Guo

Copyright © 2014 Wang Zhiwen and Sun Hongtao. 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.


In order to avoid quality of performance (QoP) degradation resulting from quality of service (QoS), the solution to network congestion from the point of control theory, which marks departure of our results from the existing methods, is proposed in this paper. The congestion and bandwidth are regarded as state and control variables, respectively; then, the linear time-invariant (LTI) model between congestion state and bandwidth of network is established. Consequently, linear quadratic method is used to eliminate the network congestion by allocating bandwidth dynamically. At last, numerical simulation results are given to illustrate the effectiveness of this modeling approach.