针对FAST TCP协议参数选择指导方案存在的缺陷,建立了包含窗口更新周期参数和指数滤波环节的FAST TCP网络拥塞控制时滞模型.通过分析得出其超越方程特征根分布在左半平面条件,提出了一种根据控制器增益参数、窗口更新周期和网络相关参数,来选择合适协议参数确保FAST TCP系统稳定的改进指导方案.NS2仿真验证表明,和相关指导方案相比,该改进方案具有更准确的选择范围和更广泛的应用范围. Aiming at the shortcomings of the guidance scheme of FAST TCP protocol selection, a FAST TCP network congestion control delay model with window updating period parameters and exponential filtering is established. The eigenvalues ​​of the transcendental equation are found to be distributed in the left half plane. An improved guidance scheme based on controller gain parameters, window update cycle and network related parameters to select the appropriate protocol parameters to ensure the stability of FAST TCP system.NS2 simulation shows that the proposed scheme is more accurate than the related guidance scheme The range of options and wider range of applications.