Network operational method by using software-defined networking for improvement of communication quality at disasters

The Great East Japan Earthquake, which occurred in March 2011, damaged information infrastructure. Latest researches showed that some parts of communication networks are available even immediately after the earthquake. Therefore, connections among the different available parts of communication networks can keep communication quality for damaged areas at disasters. Recently, “Software-Defined Networking (SDN)” is one of the up-and-coming network configuration technologies. SDN is useful for the network operation and connection quality at disasters. This paper describes the problems of the information infrastructure at disasters, proposes a network operation method at disasters using SDN to keep connection quality for disaster areas and implements the proposed method.