数据中心网络差分流传输控制协议研究

发布时间：2019-05-20 11:32

【摘要】：针对数据中心网络多对一通信流量产生TCP Incast拥塞导致吞吐量降低,以及小流易受大流影响难以满足应用截止时间要求等问题,提出了差分流传输控制协议(DFTCP)。DFTCP采用主动队列管理机制,利用显式拥塞通知机制传递拥塞信息,通过控制交换机队列长度来减少突发流分组的丢失以解决TCP Incast问题。DFTCP在终端服务器中对TCP流进行分类,当网络发生拥塞时,基于网络状态信息和流分类信息调节TCP拥塞窗口,通过对大流进行更大程度的拥塞退避从而减小其对网络中其他TCP流传输性能的影响,进而减少小流完成传输的时间,解决小流高延迟的问题。仿真实验表明:与传统TCP相比,DFTCP能够避免因TCP Incast拥塞导致的吞吐量崩溃;与数据中心传输控制协议(DCTCP)相比,DFTCP能够减少小流传输完成的时间,同时DFTCP能够实现共享同一链路的多个大流快速收敛,保证公平性。
[Abstract]:In order to solve the problems of TCP Incast congestion caused by many-to-one traffic in data center network, the throughput is reduced, and the small flow is vulnerable to the influence of large flow, which is difficult to meet the application deadline requirements. A differential shunt transmission control protocol (DFTCP). DFTCP) is proposed, which adopts active queue management mechanism and explicit congestion notification mechanism to transmit congestion information. The TCP Incast problem is solved by controlling the queue length of the switch to reduce the loss of burst packets. DFTCP classifies the TCP flow in the terminal server, and adjusts the TCP congestion window based on the network state information and flow classification information when the network is congested. By blocking the large flow to a greater extent, the influence on the transmission performance of other TCP streams in the network is reduced, and then the transmission time of the small stream is reduced, and the problem of high delay of the small flow is solved. The simulation results show that compared with the traditional TCP, DFTCP can avoid the throughput collapse caused by TCP Incast congestion. Compared with the data center transmission control protocol (DCTCP), DFTCP can reduce the completion time of small stream transmission, and DFTCP can realize the fast convergence of multiple large streams sharing the same link and ensure fairness.
【作者单位】：重庆大学通信工程学院;
【基金】：国家自然科学基金资助项目(61301119) 教育部留学归国人员启动基金资助项目(1020607820140002)
【分类号】：TP393.06

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