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FAST TCP快速收敛算法研究
  • 期刊名称：高技术通讯
  • 时间：0
  • 页码：778-783
  • 语言：中文
  • 分类：TP393.01[自动化与计算机技术—计算机应用技术;自动化与计算机技术—计算机科学与技术]
  • 作者机构：[1]广东工业大学自动化学院,广州510090, [2]茂名学院计算机与电子信息学院,茂名525000
  • 相关基金：国家自然科学基金（60604006）,教育部博士点基金（20070562005）和广东省联合基金（u0735005）资助项目.
  • 相关项目：复杂传感与控制网络系统的建模、控制与优化
作者： 陈晓龙|章云|田义强|刘治|
关键词： 排队时延, 快速收敛, 慢启动阈值, 增益参数, 协同, queuing delay, rapid convergence, slow start threshold, gain parameter, cooperative
中文摘要：

针对FASTTCP静态选择协议参数无法同时保证网络小的排队时延和快速收敛的缺陷，通过理论分析和NS-2仿真探讨了FASTTCP协议各参数和收敛速度的关系。在此基础上，将各连接留在链路缓冲区的个数作为慢启动阈值，提出了一种根据各连接协议参数确定慢启动阈值，根据各连接源端局部信息协同估计网络运行状态，调整控制律增益参数的改进方法。NS-2仿真结果表明该方法保证系统处于稳定状态和具有小的排队时延，同时提高了系统收敛到平衡点的速度。

英文摘要：

Aiming at the problem that the FAST TCP static mapping protocol parameter method can not achieve low queuing delay and rapid convergence at the same time, the paper studies the relation between the convergent velocity and FAST TCP parameters by theoretical analysis and NS-2 simulation, and on the basis of this, takes the number of packets each connection maintained in the link buffers as the dimension of the FAST TCP connection＇ s slow start threshold, and proposes an enhanced method that computes the slow start threshold according to each FAST TCP flow protocol parameter, cooperatively estimates the network running state and dynamically tunes the controller gain parameter based on the TCP source local information. The NS-2 simulation results demonstrate that with the application of this enhanced method, the stability and the low queuing delay can be achieved simultaneously, while the system can also converge to equilibrium rapidly.

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