SDN网络中基于业务划分的路由选择机制

摘要

软件定义网络(SDN)是一种新型的网络架构,其路径是根据全局网络拓扑计算得到的.然而,当前SDN网络中依然存在负载不均衡和不能满足网络流量QoS要求的问题.为此,根据SDN控制器掌握全局网络信息的特点,结合网络感知功能和基于流量的业务划分,利用K最短路径算法,提出一种基于业务划分的路由选择机制.实验结果表明,该机制能够为不同业务类型的数据流选择一条最能满足其QoS要求的路径,并使整个网络达到负载均衡,进而提高了底层网络资源的利用率.%Software defined network is a novel network architecture whose data path is obtained based on the global topology.In current SDN network,load balance and QoS assurance are the crucial issues which are unresolved perfectly.To this end,according to the global network information hold by the SDN controller,we proposed a differentiated business based routing mechanism in which the function of network awareness,the traffic-based business differentiating and the K shortest path algorithm are applied.Experimental results show that this mechanism can choose an optimal path which satisfies the QoS requirements for different types of data traffics,balance the load of entire network and improve the utilization of the underlying network resources.