数据中心网络下基于SDN的TCP拥塞控制机制研究与实现

发布时间：2018-03-24 04:22

本文选题：数据中心网络　切入点：SDN　出处：《计算机学报》2017年09期

【摘要】：当前的数据中心中大量存在多个发送端向一个接收端同时发送数据的通信模式,但是,这种多对一的通信模式会造成TCP incast问题.当数据中心网络发生TCP incast时,网络整体吞吐量将急剧下降甚至崩溃.软件定义网络(SDN)下的集中控制方法和网络全局视角是解决这一问题的有效途径.文中提出一种基于SDN的TCP拥塞控制机制,称为TCCS.当OpenFlow交换机检测到网络拥塞,将产生拥塞消息并发送至控制器,控制器将通过调整背景数据流ACK报文的接收窗口来限制相应数据流的发送速率.利用SDN的全局视角,TCCS可以精确地降低背景数据流的速率来保证突发数据流的性能.TCCS机制聚焦于网络侧解决TCP incast问题,因此对端系统是透明的.最后的实验表明,TCCS机制能够容纳更多的突发数据流,而且能够保证突发数据流的吞吐量.
[Abstract]:In the current data center, there exists a large number of communication modes in which more than one sender sends data to one receiving terminal simultaneously. However, this kind of many-to-one communication mode can cause TCP incast problems. When TCP incast occurs in the data center network, The overall throughput of the network will drop sharply or even crash. The centralized control method and the global view of the network under the software definition of the network are the effective ways to solve this problem. This paper presents a TCP congestion control mechanism based on SDN. When the OpenFlow switch detects network congestion, it generates congestion messages and sends them to the controller. The controller will limit the transmission rate of the background data stream by adjusting the receiving window of the background data stream ACK packet. The global view of SDN can reduce the rate of background data stream accurately to ensure the performance of the burst data stream. The TCCS mechanism focuses on solving the TCP incast problem on the network side. Finally, the experimental results show that the TCCS mechanism can accommodate more burst data streams and ensure the throughput of burst data streams.
【作者单位】：南京理工大学计算机科学与工程学院;东南大学计算机网络和信息集成教育部重点实验室;
【基金】：江苏省博士后基金国家自然科学基金(61602243)资助~~
【分类号】：TP393.06

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