Efficient Traffic-Aware Routing Scheme for Software Defined Networks

Routing decision in software defined networks (SDN), which was based on the shortest path model, was unable to guarantee to minimize the delivery delay in the routing path. An efficient traffic-aware routing scheme was proposed, in which the information delivery latency was taken as the measurement of the routing efficiency. Based on the network-wide traffic information, various traffic indicators were considered by this scheme, including available bandwidth, packet loss probability, delay, switches invalidity probability, and routing path length, to find out the optimal routing path to enhance the efficiency of data delivery in networks. Experiments show that the scheme outperforms current scheme applied in OpenFlow framework with up to 90% improvement on efficiency. What's more, the scheme is helpful to maintain the load balance of the networks.