In this letter, we propose a mathematical model for the controller placement problem in
Software Defined Networks (SDN). More precisely, given a set of switches that must be …

Software defined network (SDN) decouples the control plane from packet processing device
and introduces the controller placement problem. The previous methods only focus on …

Controller placement is an important problem in software defined networks. Previously,
some works addressed the problem by taking into account primary factors, such as …

The controller placement problem (CPP) is one of the key challenges of software defined
networks (SDNs) to increase performance. Given the locations of n switches, CPP consists …

We consider a distributed Software Defined Networking (SDN) architecture adopting a
cluster of controllers to improve network scalability and reliability. Different from previous …

In the context of wide area networks (WANs) and software defined networking (SDN),
reducing the communication delays experienced by the network devices is an important …

Software Defined Networking (SDN) is an emerging paradigm for network design and
management. By providing network programmability and separation of control and data …

Software defined networking shifts the control plane of forwarding devices to one or more
external entities known as controllers. Determining the optimal location of controllers in the …

A key concern in the deployment of Software Defined Networks (SDN) is the location of the
controller. One issue network operators will have to face is how to expand their network at …

Currently, one of the main enablers for network evolution is software-defined networking
(SDN), where the control plane is decoupled from the data plane. A controller, as a …