| 摘要: |
| 主动队列管理(active queue management,简称AQM)是一个非常活跃的研究领域.作为对终端系统上拥塞控制的一种补充,中间节点的AQM策略在保证较高吞吐量的基础上可以有效地控制队列长度.基于TCP/AQM控制论模型,使用H(最优控制理论,以解析的方法设计了新型PID控制器.该控制器的特点是:控制器由单参数调节,可以方便地实现系统标称性能和鲁棒性能的折衷.通过NS仿真并与其他算法相比较,验证了所设计的控制器的性能.结果显示,所设计的PID控制器性能优于其他算法. |
| 关键词: 主动队列管理 PID控制器 拥塞控制 标称性能 鲁棒性 |
| DOI： |
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| 基金项目:Supported by the National Natural Science Foundation of China under Grant No.60474031 (国家自然科学基金); the National Grand Fundamental Research 973 Program of China under Grant No.2002CB312200 (国家重点基础研究发展规划(973)); the Science and Technology Phosphor Program of Shanghai of China under Grant No.04QMH1405 (上海科技启明星计划); the New Century Excellent Talents of China under Grant No.04-0383 (新世纪优秀人才支持计划) |
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| An Analytical Design Method of PID Controller Based on AQM/ARQ |
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YANG Ji-Wen,GU Dan-Ying,ZHANG Wei-Dong
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| Abstract: |
| Active queue management (AQM) is a very active research area in networking. As a complementary mechanism to the congestion control of end-to-end systems, AQM, used on the intermediate nodes, can provide high throughputs for routers and control the queue length effectively at the same time. Based on a model of TCP and AQM, a new PID controller is designed analytically using H∞ optimal control theory in this paper. The specialty of this controller is that a single parameter tuning method is proposed, through which the nominal performance and robust performance can be adjusted monotonically to achieve the trade-off. The performance of the controller is verified and compared with other methods using NS simulations. The result shows the advantages of the proposed PID controller. |
| Key words: active queue management PID controller congestion control nominal performance robustness |
