基于Simulink的TCP/PI模型仿真研究

Study on Simulation of TCP/PI Model Based on Simulink

利用Simulink构建了TCP拥塞控制模块和PI(ProportionalIntegral)控制器模块,并在此基础上构建了多个TCP连接竞争一条瓶颈链路的仿真场景。通过与网络仿真工具ns-2的对比仿真实验表明,Simulink仿真模型能够模拟TCP/PI系统的瞬态特性,而且在仿真时间上具有绝对的优势,可以用于大规模网络的参数和性能研究。

Based on Simulink, TCP congestion control model and PI controller model were built. Based on these models, a simulation scene with multiple TCP connections competing for a single bottleneck link was built. Compared with networks simulation tool ns-2, the simulation results show that this model can simulate the transient characteristic of TCP/PIand have overwhelming performance on simulating time. So the model can be used on the research of parameters and performances of large scale networks.