Hierarchical Multi-constraint Routing Algorithm Based on Software Defined Networking

The current Internet architecture interaction model is “best service” delivery, but this model does not guarantee the quality of service (QoS) of sensitive request flows. Software Defined Networking (SDN) is a new way to design, deploy, and manage networks and their services. Using the advantages of SDN forwarding and control separation, we propose a hierarchical network architecture and a multi-constrained routing algorithm based on this architecture to ensure the service quality of request flow. Finally, we verify the effectiveness of the hierarchical architecture and its multi-constrained routing algorithm from both theoretical and experimental aspects.