Journal of Computers (JCP)
Software-Defined Networking (SDN) is commonly seen as a promising way towards future Internet. Understanding the performance and limitation of its logically centralized controllers is a prerequisite of SDN deployments. For this end, this paper proposes a concise queuing model for SDN controller performance. The author first investigate that the input of a SDN controller is a hybrid Poisson stream of packet-in messages. Then, they analyze the message processing of a SDN controller to achieve a concise queuing model M/M/1 for its performance and further derive its performance parameters from queuing theory.