TCP-RED路由队列建模与分析(英文)  

Modelling and Analysis on TCP-RED Internet Routing Queue

作　　者：杜升之[1] 张甲友 刘忠信[1] 陈增强[1] 袁著祉[1] 

机构地区：[1]南开大学自动化系,天津300071 [2]济南四建(集团)有限责任公司,济南250031

出　　处：《复杂系统与复杂性科学》2005年第2期67-76,共10页Complex Systems and Complexity Science

基　　金：Natural Science Foundation of China under Grant(60374037);Innovation Research Foundation of Nankai University.

摘　　要：用NS2构建了TCP-RED系统(网络业务流是TCP包,以RED为AQM算法),以产生模拟Internet业务流的数据。基于机理分析与数据驱动相结合的思想,建立了Internet业务流的控制模型用于研究TCP-RED系统的动态特性。从RED的分段特性出发,从切换系统的角度分析了TCP-RED系统,发现网络流量的波动是由于RED的切换特性引起的。通过根轨迹法分析了此切换系统中子系统的稳定性,提出了一种在实际网络环境中调整RED来控制流量波动(甚至混沌)的方法。本文所得的RED参数调节法基于实际网络数据的分析,而不是只依赖经验或机理分析。NS2的仿真实验证实了它的有效性。TCP-RED systems （using RED as AQM algorithm on routers and traffic streams being TCP packets） are constructed in NS2 to simulate Internet traffic. Control theory models based on mechanism analysis and data-driven modelling are proposed and used to study dynamic characters of TCP-RED system. Beginning from the piecewise nature of RED, this paper analyzes TCP-RED system on the view of switching system, and finds that oscillation arise from RED＇ s switching character. Root locus is used to analyze stability of subsystems in this switching system. And this paper provides a criterion for RED parameter tuning in actual Internet scenarios for system dynamic behavior controlling and oscillation/chaos avoidance. Comparing with previous related work, RED parameter decision obtained in this paper comes from the analysis on real time traffic status rather than experience or merely mechanism analyzing. Simulations in NS2 show this method is useful.

关 键 词：INTEMET RED算法 主动队列管理 切换系统 

分 类 号：TP39[自动化与计算机技术—计算机应用技术]