基于流量调度的SDN数据中心网络拥塞控制算法

针对采用软件定义网络(SDN)的数据中心网络拥塞的问题,提出一种基于流量调度的数据中心网络拥塞控制算法。当链路发生拥塞时,该算法首先判别拥塞链路中 链路上关键度最大的大流,然后对大流进行重路由计算,选择调度开销最小的流,并进行调度代价计算,最后对调度代价最小的流进行调度。实验结果表明,所提算法能够有效缓解网络拥塞,降低丢包率,提高链路利用率,使得网络性能更为稳定。

Traffic Scheduling Based Congestion Control Algorithm for Data Center Network on Software Defined Network

To alleviate the congestion problem using software defined network (SDN) in the modern data center network,a traffic scheduling based congestion control algorithm was proposed.When the link is congested,the proposed algorithm firstly discriminates the large flow of the maximum critical degree link in the congestion link,and then it reroutes the large flow,selects the minimum flow scheduling overhead,and calculates the scheduling cost.Finally,the minimum scheduling cost flow can be scheduled based on the above-mentioned process.Experimental results show that,the proposed algorithm can alleviate network congestion,improve the link utilization and enhance the network stability by reducing the dropout rates.