基于SDN的QoS研究

Research on QoS of SDN

网络中的新兴应用和服务日益增多,这对带宽和延时等服务质量(QoS)的保证提出了更高的要求。针对支持现有网络中端到端的服务质量这个热点问题,学术界和产业界提出了多种方案,但由于传统网络的局限性,基本都以失败或达不到预期要求而告终。而软件定义网络(SDN)的出现改变了传统网络的局限性。针对传统网络中QoS方案存在的问题,提出利用SDN来提升QoS的观点。基于Open Flow的SDN架构对QoS的支持情况进行了分析,发现在基于Open Flow的SDN架构下实现QoS比传统网络中更容易更灵活。最后对现今基于SDN的架构下的QoS实现方案做了阐述,并对其将会遇到的挑战和问题进行分析。

With the increasing of the novel applications and services,the higher requirements are raised about quality of service(QoS)such as bandwidth and latency.For the hot issue of supporting end-to-end QoS in traditional network architectures,a variety of solutions were put forward by academia and industry,which failed or could not meet the requirements because of the limitations of the traditional network.The emergence of the software defined network(SDN) has changed such limitations of traditional networks. According to the problem of traditional QoS,we use the viewpoint of SDN to improve QoS.Through the analysis of QoS support in Open Flow-based SDN architecture,it is found that implementing QoS under Open Flow-based SDN architecture is easier and more flexible than in traditional network.Moreover,the latest achievements for QoS based on SDN architecture are introduced and their future works have been summarized.