针对动态网络的拥塞问题,对TCP网络的动态不确定性进行定量分析,探讨了网络参数的摄动范围,给出TCP网络的不确定线性化系统模型。在此基础上,设计了一种基于滑模控制的主动队列管理算法,并分别在Matlab和NS2两种仿真平台上验证了算法的有效性,实验结果表明队列长度可以很好地稳定在期望值附近。
For the congestion problems of dynamic network,this paper qualitatively analyzes the dynamics uncertainties of TCP network,and explores the range of parameter uncertainties,and drives the uncertain linear model of TCP network.Based on the above model,a novel active queue management algorithm based on sliding mode control is proposed.Simulations based on Matlab and NS2 simulation platform,respectively,are made to illustrate the effectiveness of the proposed algorithm.It is seen from the simulation results that the queue can attain a better stability in the vicinity of desired value.