1 Software Defined Networking for Heterogeneous Networks

Software–Defined Networking (SDN) has been proposed as a way to programmatically control networks, making i

A Survey of Software-Defined Networking: Past, Present, and Future of Programmable Networks

The idea of programmable networks has recently regained considerable momentum due to the emergence of the Software-Defined Networking (SDN) paradigm. SDN, often referred to as a “radical new idea in networking”, promises to dramatically simplify network management and enable innovation through network programmability. This paper surveys the stateof-the-art in programmable networks with an emphasis on SDN. We provide a historic perspective of programmable networks from early ideas to recent developments. Then we present the SDN architecture and the OpenFlow standard in particular, discuss current alternatives for implementation and testing SDNbased protocols and services, examine current and future SDN applications, and explore promising research directions based on the SDN paradigm