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Robust Congestion Control Design for Input Time Delayed AQM System

  • Ji Hoon Yang
  • Seung Jung Shin
  • Dong Kyun Lim
  • Jeong Jin Kang
Part of the Communications in Computer and Information Science book series (CCIS, volume 200)

Abstract

This paper proposes the LQ-Servo control for input-time-delayed AQM(Active Queue Management) using Loop-shaping method. The proposed controller structure is made by both taking a traditional servo mechanism based on Linear Quadratic approach and augmenting a new state variable. And, the new loop shaping method is developed by shifting all zeros to a larger pole of AQM model to determine the design parameters. And also, the proposed LQServo controller is extended the control input with time-delay using Smith’s principle.

Keywords

Congestion control Flow-based traffic management Loop- Shaping LQ-Servo Time-delay 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Ji Hoon Yang
    • 1
  • Seung Jung Shin
    • 2
  • Dong Kyun Lim
    • 3
  • Jeong Jin Kang
    • 4
  1. 1.Department of Electrical EngineeringHanyang UniversitySeoulKorea
  2. 2.Department of Information & TechnologyHansei UniversityGunpo-CityKorea
  3. 3.Department of Computer ScienceHanyang Cyber UniversitySeoulKorea
  4. 4.Department of Information & CommunicationDong Seoul UniversitySeongnam-CityKorea

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