Design of AQM controllers for IP routers based on H∞ optimal control

Authors:
Qiang Chen;Oliver W. W. Yang
Affiliations:
Computer Communication Network Research Lab, School of Information Technology and Engineering, University of Ottawa, 161 Louis Pasteur, CBY-A514, Ottawa, Ontario K1N 6N5, Canada.;Computer Communication Network Research Lab, School of Information Technology and Engineering, University of Ottawa, 161 Louis Pasteur, CBY-A514, Ottawa, Ontario K1N 6N5, Canada
Venue:
International Journal of Internet Protocol Technology
Year:
2006

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Abstract

Based on the recently developed feedback control model for theTransport Control Protocol (TCP), this paper has formulatedcontroller design procedures for Active Queue Management (AQM) inInternet Protocol (IP) routers using the H∞ optimal controltheory. The H∞ loop-shaping technique is applied to solve theS/U Mixed Sensitivity Problem (MSP) and S/T/U MSP in the controllerdesign. Different weight functions and their impacts on the systemperformance are evaluated and discussed. The effectiveness of thedesigned controller is verified through OPNET simulations.