作　　者： ; ; ; ;

机构地区： 广东工业大学自动化学院

出　　处： 《高技术通讯》 2010年第8期778-783,共6页

摘　　要： 针对FAST TCP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FAST TCP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。 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.

关 键 词： 排队时延 快速收敛 慢启动阈值 增益参数 协同

领　　域： [自动化与计算机技术] [自动化与计算机技术]