Predictive functional control for active queue management in congested TCP/IP networks.

Clicks: 194
ID: 13275
2009
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Abstract
Predictive functional control (PFC) as a new active queue management (AQM) method in dynamic TCP networks supporting explicit congestion notification (ECN) is proposed. The ability of the controller in handling system delay along with its simplicity and low computational load makes PFC a privileged AQM method in the high speed networks. Besides, considering the disturbance term (which represents model/process mismatches, external disturbances, and existing noise) in the control formulation adds some level of robustness into the PFC-AQM controller. This is an important and desired property in the control of dynamically-varying computer networks. In this paper, the controller is designed based on a small signal linearized fluid-flow model of the TCP/AQM networks. Then, closed-loop transfer function representation of the system is derived to analyze the robustness with respect to the network and controller parameters. The analytical as well as the packet-level ns-2 simulation results show the out-performance of the developed controller for both queue regulation and resource utilization. Fast response, low queue fluctuations (and consequently low delay jitter), high link utilization, good disturbance rejection, scalability, and low packet marking probability are other features of the developed method with respect to other well-known AQM methods such as RED, PI, and REM which are also simulated for comparison.
Reference Key
bigdeli2009predictiveisa Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Bigdeli, N;Haeri, M;
Journal ISA transactions
Year 2009
DOI
10.1016/j.isatra.2008.10.001
URL
Keywords Keywords not found

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