*1: SDN (Software Defined Networking) is a network technology that enables you to dynamically make settings and changes to the network configuration using software. In this white paper, the term Software Defined Transport Network (SDTN) refers to the technology for dynamically making changes to the settings on the optical transport network.
*2: OpenFlow is a registered trademark of Open Networking Foundation (ONF).
*3: Information in the access network is gathered in the metro networks, and the core network is built by aggregating metro networks.
*4: Optical communication device that transports multiple-wavelength optical signals on an optical fiber - the device used for the test this time is capable of transporting 100Gbit/s of data per wavelength or a few terabits of data per optical fiber line. This work is partly supported by the R&D project on “Digital Coherent Optical Transceiver Technologies (FY. 2009)” and “High-speed Optical Edge Node Technologies (FY. 2010-2011)” by the Ministry of Internal Affairs and Communications (MIC) of Japan.
*5: Optical device that provides a communication path suitable for the purpose - an optical circuit is provided to end users who require high-definition image transmission or high quality communication for telemedicine or TV conference, and the optical packet switching is used for web access, e-mail forwarding and transfer of sensor data from a large number of devices.
*6: “Elastic” refers to the nature that allows users to flexibly change the signal bandwidth according to the requested bandwidth.
*7: The prototype supplied by Keio Univ. has been created based on the achievements obtained in the “Research and development on elastic optical aggregation technology,” a NICT-commissioned research project.
*8: The aggregation network resides in between the access networks for services deployed locally and the core networks connecting communication stations and serves as a concentrator network for all services that aggregates traffic from the access networks before forwarding it to the core network. The next-generation optical aggregation network is aimed at realizing the integrated network supporting each service using the network virtualization technology and SDN technology by extending the Fiber to the Home (FTTH) technology and expanding the part where signals are converted into optical signals by integrating the aggregation network into the access network to create the active optical distribution network.
*9: The integrated control system (prototype) supplied by KDDI R&D Labs. has been created based on the achievements obtained in the “Scalable and efficient orchestration of Ethernet services using software-defined and flexible optical networks (STRAUSS),” a project commissioned by the MIC.
*10: This test will be conducted as part of the “Research and development project on Multi-Technology Transport Network Control Technology” promoted by the Interoperability Working Group (Chair: Naoaki Yamanaka, Professor for Faculty of Science and Technology, Keio Univ. ) of the Research Promotion Council of Keihanna Info-Communication Open Lab. This council has been working to contribute to the development of economy in the Kansai region by promoting the research and development in the ICT field through government-industry-academia collaboration. The Interoperability Working Group consisting of 9 organizations including KDDI R&D Labs., Mitsubishi Electric, NICT and Keio Univ. is one of the working groups of this council and has been making various proposals and performing verification on the interoperability of the next-generation optical network.