基于OpenFlow的网络拥塞控制机制研究

Study on network congestion control mechanism based on Open Flow

针对OpenFlow网络中的拥塞问题,基于SDN/OpenFlow网络架构,提出一种新的OpenFlow网络拥塞控制机制。该机制具有利用控制器对网络资源进行全局管理的优点,即当网络中有节点处于拥塞状态,控制器选择一条或者多条合适的数据流在拥塞节点的上一跳节点进行重路由传输。实验结果表明:该机制既能够有效地缓解网络的拥塞状况,保证用户的服务质量,同时又能够提高网络资源利用率。

Based on SDN / OpenFlow network architecture,a new OpenFlow network congestion control mechanism is proposed so as to solve the congestion problem. The mechanism is based on OpenFlow controller that can globally manage network resources. When the network has nodes in a congestion control state,the controller can choose one or more suitable flow for rerouting in congestion node hop node. The experimental results show that this mechanism can effectively ease network congestion,ensure service quality,and also can enhance the utilization of network resources.