Optimization of open flow controller placement in software defined networks

The world is entering into the era of Big Data where computer networks are an essential part. However, current network architecture not very convenient to configure such leap. Software defined (SDN) a new which argues separation control and data planes devices by centralizing former in high level, centralised efficient supervisors, called controllers. This paper proposes mathematical model that helps optimizing locations controllers within while minimizing overall cost under realistic constrains. Our method includes finding minimum placing controllers; these costs latency, controller processing power link bandwidth. Different types topologies have been adopted consider profile controllers, links switches. results showed as size input increased, time find optimal solution also increased non-polynomial time. In addition, linearly with size. Furthermore, when increasing allocating possible for same number switches, was found be less.