A variable structure control approach to active queue management for TCP with ECN

It has been shown that the transmission control protocol (TCP) connections through the congested routers can be modeled as a feedback dynamic system. In this paper, we design a variable structure (VS) based control scheme in active queue management (AQM) supporting explicit congestion notification (...

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Bibliographic Details
Published in:IEEE transactions on control systems technology 2005-03, Vol.13 (2), p.203-215
Main Authors: Peng Yan, Yuan Gao, Ozbay, H.
Format: Article
Language:English
Subjects:
Active control
Active queue management (AQM)
Applied sciences
Computer science
control theory
systems
Computer systems and distributed systems. User interface
Control system analysis
Control systems
Control theory. Systems
Design engineering
Dynamical systems
Exact sciences and technology
explicit congestion notification (ECN)
Feedback
Fluctuations
Internet
Management
Nonlinear dynamical systems
Nonlinear dynamics
Protocols
Quality of service
Queues
Robust control
robustness
Software
TCP (protocol)
TCPIP
transmission control protocol (TCP)/Internet protocol (IP)
variable structure (VS) control
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Description
Summary:It has been shown that the transmission control protocol (TCP) connections through the congested routers can be modeled as a feedback dynamic system. In this paper, we design a variable structure (VS) based control scheme in active queue management (AQM) supporting explicit congestion notification (ECN). By analyzing the robustness and performance of the control scheme for the nonlinear TCP/AQM model, we show that the proposed design has good performance and robustness with respect to the uncertainties of the round-trip time (RTT) and the number of active TCP sessions, which are central to the notion of AQM. Implementation issues are discussed and ns simulations are provided to validate the design and compare its performance to other peer schemes' in different scenarios. The results show that the proposed design significantly outperforms the peer AQM schemes in terms of packet loss ratio, throughput and buffer fluctuation.
ISSN:1063-6536
1558-0865
DOI:10.1109/TCST.2004.839566