基于多队列切换的SDN拥塞控制

由于传统网络缺乏对转发队列的直接控制,并且难以保证链路利用率和服务质量(QoS),针对这一问题,本文提出基于多队列的SDN拥塞控制算法。该算法对链路数据流量设置多个阈值,当某一链路流量突增达到设定阈值时,控制器立即启动相应的拥塞控制机制。根据数据流的优先级,自适应增加高优先级队列的带宽,适当减小低优先级数据队列的带宽,保障高优先级数据顺利传送。实验结果表明,该方法能有效减少网络拥塞,优化数据流的QoS。

SDN Congestion Control Based on Multi-queue Switching

Due to the lack of direct control over forwarding queues in traditional networks, and the difficulty in ensuring link utilization and quality of service(QoS), this paper proposes a SDN congestion control algorithm based on multi queue. The algorithm sets multiple thresholds for link data traffic. When a link traffic suddenly increases to some threshold, the controller immediately starts the corresponding congestion control mechanism. According to the priority of data flow, the bandwidth of high priority queue is increased adaptively, and the bandwidth of low priority data queue is reduced appropriately to ensure the smooth transmission of high priority data. Experimental results show that this method can effectively reduce network congestion and optimize QoS of data flow.