Abstract
Now, SDN (Software Defined Networking) has been accepted as an unavoidable networking architecture since the ONF (Open Networking Forum) foundation, the release of Google's B4 project, and several respective deployments of cloud and transport SDNs. In addition, SDN has been investigated for a basic networking infrastructure for the 5G/IoT's era and an integration between SDN based cloud and transport networks. Through the shift of networking paradigm to SDN, this paper describes the overall R&D processes including requirements, architecture, implementation, and testbed for the SDN orchestration over distributed cloud networks connected through transport networks, as a part of effort to realize the core technologies of smart network infrastructure.
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