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Robust Active Queue Management for Wireless Networks
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DOI：10.1109/TCST.2010.2081671.png)
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摘要
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Active Queue Management (AQM) algorithms have been extensively studied in the literature in the context of wired networks. In this paper, we study AQM for wireless networks. Unlike a wired link, which is assumed to have a fixed capacity, a wireless link has a capacity that is time-varying due to fading. Thus, the controller is required to meet performance objectives in the presence of these capacity variations. We propose a robust controller design that maintains the queue length close to an operating point. We treat capacity variations as an external disturbance and design a robust controller using H-infinity control techniques. We also consider the effect of round-trip time in our model. Our method of incorporating the delay into the discretized model simplifies controller design by allowing direct use of systematic controller design methods and/or design packages. We demonstrate the robustness of the controller to changes in the load condition and in the round-trip time through ns - 2 simulations.
Keyword:
Congestion control
discretization
H-2 control
H-infinity control
robust control
wireless network
期刊
IF:
3.9
论文数:
4.9K
被引数:
1.7W
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