Distributed SDN controllers optimization for energy saving

This paper presents a proposal for energy optimization on Software-Defined Network (SDN) by a proper controller placement. First, the discussion shows the definition of SDN and the role of controllers, then the current state-of-the-art on distributed SDN controllers is briefly discussed showing that current research on this topic focuses on fault-tolerance and load-balancing. Then the energy saving SDN strategies are presented and the problem of saving energy on the control-plane is given further details. A new approach based on parallelism and lower processor frequencies is demonstrated finally, the expected results and key contributions are defined.