摘要
为了研究传输控制协议(Transmission Control Protocol,TCP)在异构网络下是否具有混沌特性,通过对TCP在异构网络系统中参数的分析,对系统是否存在周期性、系统初值敏感性(蝴蝶效应)以及奇异吸引子等几方面进行验证,证实了特定情况下TCP拥塞控制在异构网络中具有混沌特性。实验结果表明,在瓶颈带宽较小的情况下,异构网络系统具有较好的周期性,且在异构网络系统下不会出现TCP死锁现象。在瓶颈带宽较大的情况下,异构网络系统表现出混沌特性。同时提出在相同条件下选取合适的初值能使一个复杂的,混沌无序的异构网络系统转换为一个比较简单且具有较好的稳定性的系统,从而为异构网络系统中TCP性能的提升指出了一个新的方向。
In order to study the chaos nature of TCP in Heterogeneous Network, the major features were demonstrated such as periodicity, sensitivity to initial conditions(butterfly effect), and strange attractor of chaotic system by analyzing parameters in Heterogeneous Network proving that TCP shows chaos nature in Heterogeneous Network in certain situations. Numerical examples show that in the case of system with low bottleneck link, the system shows fine periodic and stable behavior, and there is no TCP deadlock phenomenon in the heterogeneous network system. In the case of system with larger bottleneck link, the system shows chaotic. And a chaotic and non-predictable Heterogeneous Network system can be turned into a regular easy-to-handle system by choosing proper initial value of parameters in the same condition, which throws new light on improving the TCP's performance in Heterogeneous Network.
出处
《系统仿真学报》
CAS
CSCD
北大核心
2015年第7期1541-1547,共7页
Journal of System Simulation
基金
国家自然科学基金(61070247)
河南省教育厅自然科学基金项目(2009A520011)
河南省科技攻关项目(112102210186)
关键词
异构网络
混沌特性
TCP拥塞控制
奇异吸引子
初值敏感性
heterogeneous network
chaotic nature
TCP congestion control
strange attractor
sensitivity to initial conditions
