摘要
针对网络中普遍存在的参数实时变化、难以调节的问题,将不完全微分PID控制器用于主动队列管理,利用控制理论中的不完全微分PID控制器来实时调整RED算法的最大丢弃概率,使AQM系统能自适应地调节自身参数来改善控制性能。仿真结果显示:小负载情况下,不完全微分PID-RED较PI和RED算法的响应速度更快,很快就能达到期望值;当改变网络负载时,不完全微分PID-RED算法可以迅速地调节瞬时队列至期望值,响应时间较短,表现了很好的鲁棒性。
A new Random Early Detection algorithm（RED） which is based on incompletion differential PID controller is proposed to cope with the time-varying network parameters.The differential PID controller is employed to design controller to adjust the RED algorithm,so the AQM system could adaptively adjust its parameters to improve the control performance.Finally the performances in queue length stability and robustness were simulated by the simulator,and the results have been studied and analyzed,and the new algorithm is verified to be better than the RED and PI algorithms.
出处
《青岛大学学报（工程技术版）》
CAS
2010年第4期52-56,共5页
Journal of Qingdao University(Engineering & Technology Edition)
关键词
拥塞控制
主动队列管理
随机早期检测
PID控制器
congestion control
active queue management
random early detection
PID controller
作者简介
孔莹莹（1981-）,女,山东济宁人,硕士研究生,研究方向为计算机网络及智能控制.
