基于ECN的TCP主动队列管理中的变结构控制

P. Yan, Yuan Gao, H. Özbay
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引用次数: 12

摘要

研究表明,通过拥塞路由器的TCP连接可以建模为一个反馈动态系统。本文设计了一种基于可变结构(VS)的主动队列管理(AQM)控制方案,支持显式拥塞通知(ECN)。通过分析非线性TCP/AQM模型控制方案的鲁棒性和性能,我们表明所提出的设计对于往返时间(RTT)和活动TCP会话数的不确定性具有良好的性能和鲁棒性,这是AQM概念的核心。讨论了实现问题,并提供了ns仿真来验证设计,并将其与其他对等方案在不同场景下的性能进行了比较。结果表明,该设计在丢包率、吞吐量和缓冲区波动方面明显优于同类AQM方案。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Variable structure control in active queue management for TCP with ECN
It has been shown that the TCP connections through the congested routers can be modeled as a feedback dynamic system. In this paper, we design a variable structure (VS) based control scheme in active queue management (AQM) supporting explicit congestion notification (ECN). By analyzing the robustness and performance of the control scheme for nonlinear TCP/AQM model, we show that the proposed design has good performance and robustness with respect to the uncertainties of the round-trip time (RTT) and the number of active TCP sessions, which are central to the notion of AQM. Implementation issues are discussed and ns simulations are provided to validate the design and compare its performance to other peer schemes' in different scenarios. The results show that the proposed design significantly outperforms the peer AQM schemes in terms of packet loss ratio, throughput and buffer fluctuation.
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