摘要
主动队列管理(activequeuemanagement,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.
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.
出处
《软件学报》
EI
CSCD
北大核心
2006年第9期1989-1995,共7页
Journal of Software
基金
No.60474031 (国家自然科学基金)
No.2002CB312200 (国家重点基础研究发展规划(973))
No.04QMH1405 (上海科技启明星计划)
No.04-0383 (新世纪优秀人才支持计划)~~
关键词
主动队列管理
PID控制器
拥塞控制
标称性能
鲁棒性
active queue management
PID controller
congestion control
nominal performance
robustness