SDN over IP: Enabling Internet to Provide Better QoS Guarantee

Many multimedia applications and online services have risen on the Internet, and they demand high quality of service for their real-time interaction. Although DiffServ has been employed in the network core, it neither provide end-to-end QoS guarantee, nor realize fine-grained flow control, which decrease the effect. To address these issues, we propose an incremental deployed approach, namely SoIP, to enhance the capability of QoS guarantee in Internet, and the core idea is to build a software-defined overlay network over IP network, and take advantage of the characteristic of per-flow management in SDN to satisfy the resource demands of these applications. Simultaneously, IP network preserves the differentiated services. Moreover, we present the coupling mechanism to implement the collaboration between software-defined networks and the IP network to achieve better resource utilization. Finally, we validate the feasibility and effectiveness of the proposed approach by simulation experiments.