Report on the successful demonstration of innovative basic technologies for future optical access network “Elastic Lambda Aggregation Network” ～ Elastic access-metro integrated network that flexibly changes the transmission speed and optical frequency bandwidth towards future multiple services accommodation beyond 2030 ～
April 25, 2017
Nippon Telegraph and Telephone Corporation Hitachi, Ltd. Oki Electric Industry Co., Ltd. Keio University KDDI Research, Inc. Furukawa Electric Co., Ltd.
Nippon Telegraph and Telephone Corporation (NTT, Chiyoda-ku, Tokyo, CEO: Hiroo Unoura), Hitachi, Ltd. (Hitachi, Chiyoda-ku, Tokyo, President & CEO: Toshiaki Higashihara), Oki Electric Industry Co., Ltd. (OKI, Minato-ku, Tokyo, President Shinya Kamagami), Keio University (Keio, Minato-ku, Tokyo, President Professor Atsushi Seike), KDDI Research, Inc. (KDDI Research, Fujimino-shi, Saitama, president, CEO: Yasuyuki Nakajima) and Furukawa Electric Co., Ltd. (Furukawa Electric, Chiyoda-ku, Tokyo, President: Keiichi Kobayashi) have jointly challenged the advanced future network for 2030 and beyond by conducting innovative studies on “Elastic Lambda Aggregation Network (EλAN)”.
EλAN sets an adaptive modulation OFDM transmission system, which leads to the significant improvement of optical frequency utilization efficiency, into the access (subscriber’s home-central office)-metro (central office-central office) network that directly connects the subscriber’s home and the metro central offices via fibers and WSSs. Therefore, EλAN provides flexible assignment of the transmission speed and optical frequency bandwidth to support diversified services with different types of traffic, such as internet, enterprise line, and mobile services.
We demonstrated the reliability of EλAN through a prototype testbed network which utilizes optical path provisioning and switching technologies. The demonstration successfully showed, for the first time, that the service accommodated in the failed office was automatically re-connected within 10 sec to another office some 10km away with the same transmission speed as before the failure. The project accomplishments will be presented at an international conference on optical communications, iPOP2017 (The 13th International Conference on IP + Optical Network 2017: Kawasaki-city, Kanagawa, Japan: June 1-2, 2017).
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