摘要
针对FAST TCP协议参数选择指导方案存在的缺陷,提出了一种改进FAST TCP模型选择协议参数指导方案。建立了包含窗口更新周期参数和历史窗口值的非线性、时滞FAST TCP网络拥塞控制模型,在平衡点线性化后,采用pade近似式处理其时滞项,应用劳思-郝尔维兹稳定判据获得了确保该模型稳定的相关协议参数和网络参数应满足的条件。根据该稳定性条件,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选择合适协议参数的指导方案。NS2仿真结果表明,该方案得到更不保守的协议参数设置范围和更广泛的应用范围。
Aimed at the weakness of FAST TCP preferences guideline,the nonlinear time-delay FAST TCP network congestion control model which included the window update period parameter and the histroy window value is established,and this model stability is analysed with Routh-Hurwitz stability criterion.Based on the condition of stability,an improved preferences guideline is proposed to ensure the FAST TCP network stability according to the controller gain parameter,the window update period,and the network relevant parameters.The NS-2 simulation results demonstrate that this improved guideline possesses less conservative select ranges and more extensive appli-cation area.
出处
《计算机工程与设计》
CSCD
北大核心
2011年第3期810-813,共4页
Computer Engineering and Design
基金
广东省科技计划基金项目(2008B011000015)
关键词
拥塞控制
稳定性
历史窗口值
指导方案
参数选择
congestion control
stability
history window value
guildline
preferences
