… controller or multiple controllers. While the first is not suitable for large-scale networks, the
latter is confronted with a controller placement problem (… optimal number of controllers within a …

… controllers efficiently to improve the performance of the network is known as controller placement
problem … that minimizes the total average latency of SDN. To the best of our knowledge, …

… small SDN domains. After presenting our metrics of the SDN controller placement problem,
… For testing purposes we developed a new framework to test the SDN controller in WAN. The …

… This is the first mathematical model for the SDN controller placement. They use CPLEX
Optimizer 12.5 to find all optimized results for controller placement in SDN.28 In Table 5, we list …

… In [5], the SDN controller placement problem is addressed for the first time. The basic case
… functions placement setting [14], this work focuses on the SDN controller placement problem …

… controller placement problem for link failures is still challenging today. In this paper, we study
the SDN controller placement problem for … to address the controller placement problem. For …

… on the controller placement problem (CPP) in SDN. We introduce the CPP in SDN and
highlight its … Hence, arriving at the optimal count and location of SDN controllers is an extremely …

… In our subsequent treatment of the controller placement problem presented in this section,
we follow the capacitated models and assume the following: (a) All traffic in the network is …

… controllers required and their placement in the network. This problem is referred to as the
controller placement problem (… Thus a SDN controller can cover multiple NOS. Such distributed …

… The authors propose merging MME and SGW-C functions on top of a SDN controller as
an application. The SDN controller enforces the control plane decision on the SGW-U using …