Optimal and Dynamic SDN Controller Placement

Software Defined Networking (SDN) is an emerging paradigm that separates control and data plane. This technology will be a key component in designing 5G networks that involve essentially higher capacity and lower latency. With SDN, traffic and network devices are controlled using SDN centralized controllers. Several studies denoted the limitation of using one controller in a large-scale network and advocated the use of multiple controllers. The main problem appears in the placement of these controllers in the network, while considering several criterion such as latency, network load and connectivity. To this end, our work solves the controller placement problem and deals with network load using dynamic switch migration algorithm. The validation of the algorithm and the performance analysis showed that the proposed topology is stable and presents a reduced number of load balancing occurrences.