Congestion avoidance and control
SIGCOMM '88 Symposium proceedings on Communications architectures and protocols
Random early detection gateways for congestion avoidance
IEEE/ACM Transactions on Networking (TON)
Robust and optimal control
Self-similarity in World Wide Web traffic: evidence and possible causes
IEEE/ACM Transactions on Networking (TON)
End-to-end internet packet dynamics
IEEE/ACM Transactions on Networking (TON)
Fluid-based analysis of a network of AQM routers supporting TCP flows with an application to RED
Proceedings of the conference on Applications, Technologies, Architectures, and Protocols for Computer Communication
IEEE/ACM Transactions on Networking (TON)
Passive estimation of TCP round-trip times
ACM SIGCOMM Computer Communication Review
Robust rate control for integrated services packet networks
IEEE/ACM Transactions on Networking (TON)
Congestion control for high bandwidth-delay product networks
Proceedings of the 2002 conference on Applications, technologies, architectures, and protocols for computer communications
Design of a robust active queue management algorithm based on feedback compensation
Proceedings of the 2003 conference on Applications, technologies, architectures, and protocols for computer communications
A control theoretical approach to congestion control in packet networks
IEEE/ACM Transactions on Networking (TON)
Computer Networks: The International Journal of Computer and Telecommunications Networking
Design of Adaptive PI Rate Controller for Best-Effort Traffic in the Internet Based on Phase Margin
IEEE Transactions on Parallel and Distributed Systems
New methods for passive estimation of TCP round-trip times
PAM'05 Proceedings of the 6th international conference on Passive and Active Network Measurement
Advances in internet congestion control
IEEE Communications Surveys & Tutorials
Paper: Automatic tuning of simple regulators with specifications on phase and amplitude margins
Automatica (Journal of IFAC)
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The issue of congestion control in communication networks has been attractive in recent decades and is becoming more and more important and challenging. Active queue management (AQM) has been proved to be an efficient way to alleviate or control network congestion. The existing AQM algorithms suffer from parameters tuning and robustness. They thereby are incapable to adapt the dynamics of complex networks characterized by large delay, traffic burst and uncertain users. A robust controller for AQM based on modern H"~ optimal control theory with parameters tuning is presented in this paper. Taken both robustness and closed loop performance into consideration, most desirable parameters can be regulated by the analytical formulas derived in this paper. Then we take an example for proportional-integral-differential (PID) to materialize the proposed controller. Our robust PID controller can be tuned by only one parameter, unlike traditional PID controllers which are tuned by three or more. Theoretical analysis shows that the robust controller can converge to the reference value at a steady state. Simulation results confirm our expectation that our PID controller for AQM outperforms the existing famous congestion controllers, such as RED and PI, on keeping queue size at the target value at routers. The most important feature is that the controller is robust to the network dynamics including the changes of types of traffic and traffic load.