Premium
Design of a robust observer‐based memoryless H ∞ control for internet congestion
Author(s) -
Cui Yanliang,
Fei Minrui,
Du Dajun
Publication year - 2015
Publication title -
international journal of robust and nonlinear control
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.361
H-Index - 106
eISSN - 1099-1239
pISSN - 1049-8923
DOI - 10.1002/rnc.3377
Subject(s) - active queue management , computer science , network congestion , robustness (evolution) , router , queue , transmission control protocol , the internet , control theory (sociology) , linear matrix inequality , robust control , mathematical optimization , computer network , control system , network packet , control (management) , mathematics , engineering , artificial intelligence , world wide web , biochemistry , chemistry , electrical engineering , gene
Summary This work is concerned with the transmission control protocol(TCP)‐based active queue management for alleviating Internet congestion. To achieve the objective, a novel robust observer‐based H ∞ control scheme is proposed to stabilize the data queue length of the router to a given target. The robust observer is advocated to reconstruct a substitution state of the TCP window size under uncertain Internet environments, wherein the TCP window size is almost impossible to be explicitly measured in practise. Meanwhile, a memoryless H ∞ controller is employed to guarantee the system asymptotical stability and further enhance the robustness. With the assistance of a unique nonlinear decoupling method, a feasible controller design method is presented in terms of linear matrix inequality. Compared with the existing literatures, the proposed control principle is more practical, and it can be conveniently implemented into the Internet routers while introduces less computational burden. Finally, the proposed result is embedded into Network Simulator 2 and compared with the other schemes in the literature. Numerical experiments illustrate the effectiveness of the proposed method. Copyright © 2015 John Wiley & Sons, Ltd.