Analysis and design of controllers for AQM routers supporting TCP flows
Analysis and design of controllers for AQM routers supporting TCP flows
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DOI：
10.1109/tac.2002.1008360
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发表时间：
2002-06-01
影响因子：
6.8
通讯作者：
Gong, WB
中科院分区：
文献类型：
--
作者：
Hollot, CV;Misra, V;Gong, WB
在主动队列管理（AQM）中，核心路由器发送传输控制协议（TCP）源，目的是管理队列利用率和延迟。它本质上是一个反馈控制问题。本文基于最近发展起来的一个TCP的回避-回避模式的动态模型，做了三件事。首先，它涉及关键的网络参数，如TCP会话的数量，链路容量和往返时间的底层反馈控制问题。其次，分析了目前事实上的AQM标准：随机早期检测（RED），并确定RED的时间平均是没有好处的。最后，它建议替代AQM计划，相当于经典的比例和比例积分控制。我们说明了我们的研究结果，使用ns模拟和演示的实际影响，比例积分控制管理队列利用率和延迟。
In active queue management (AQM), core routers signal transmission control protocol (TCP) sources with the objective of managing queue utilization and delay. It is essentially a feedback control problem. Based on a recently developed dynamic model of TCPs congestion-avoidance mode, this paper does three things. First, it relates key network parameters such as the number of TCP sessions, link capacity and round-trip time to the underlying feedback control problem. Second, it analyzes the present de facto AQM standard: random early detection (RED) and determines that REDs queue-averaging is not beneficial. Finally, it recommends alternative AQM schemes which amount to classical proportional and proportional-integral control. We illustrate our results using ns simulations and demonstrate the practical impact of proportional-integral control on managing queue utilization and delay.