一种限定非TCP友好流最大界的网络拥塞模型  

A Network Model of Define Non-TCP Friendly Max Scope

作　　者：岳承君[1] 尹凤杰[1] 闫明[2] 

机构地区：[1]辽宁大学信息学院,辽宁沈阳110036 [2]辽宁大学轻产学院,辽宁沈阳110036

出　　处：《辽宁大学学报（自然科学版）》2010年第4期351-354,共4页Journal of Liaoning University：Natural Sciences Edition

基　　金：辽宁大学青年基金(2008LNDXQN16;2008LNDXQN16);辽宁省教育厅项目(20060348)

摘　　要：针对非TCP友好流不遵守拥塞控制协议,易抢占TCP友好流带宽的不公平性,设计一种保证TCP友好流传输公平性的(TCP-Friendly)的网络模型.首先分析非TCP友好流的传输特点,给出非TCP友好流传输模型,并且估计出其传输流量的最大值.然后在设计控制器时将非TCP友好流考虑成等价干扰,并在线估计其传输带宽从而限定其的最大带宽,设计控制律时利用不确定项的等价干扰方法,以便抵消网络不确定性的影响.仿真结果验证了该模型能有效地保证了TCP友好流的传输带宽的公平性且保持在网络参数变化时更好的鲁棒性.Taking account of unfairness of the bandwidth,which due to the unfriendly TCP don＇t obey to the TCP congestion control protocol,a new robust discreted sliding mode controller is presented based on the max bound of the non-TCP friendly.First,analying the character of the non-TCP friendly,the modle of the TCP-Unfriendly was given and the max translation value of an TCP-unfairness was estimated.Then the proposed controller regards the influence of unknown disturbances of non-TCP friendly flow and uncertain parameters as an equivalent disturbance,and estimated the value of the disturbance on line by the mechanism of router time delay,employing the value in designing the control law in order to cancel the slowly varying uncertainties.Simulation results show that the algorithm is highly robust against the disturbance under various networks conditions.

关 键 词：TCP友好流 非TCP友好流 公平性 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]