Novel Automatic Service Restoration Technique by Using Self-Reconfiguration of Network Resources for a Disaster-struck Metro-Access Network

作者：Kanai Takuya; Senoo Yumiko; Asaka Kota; Sugawa Jun; Tamai Hideaki; Saito Hiroyuki; Minato Naoki; Oguri Atsushi; Sumita Seiya; Sato Takehiro; Kikuchi Nobuhiko; Matsushita Shun ichi; Tsuritani Takehiro; Okamoto Satoru; Yamanaka Naoaki; Suzuki Ken ichi; Otaka Akihiro

来源：Journal of Lightwave Technology, 2018, 36(8): 1516-1523.

DOI：10.1109/JLT.2017.2787999

• Adaptive modulation
• elastic
• metro-access network
• optical access network
• orthogonal frequency division multiplexing (OFDM)

This paper shows the concept of the elastic lambda aggregation network (E lambda AN) that will achieve an elastic common access infrastructure for the metro-access network. It proposes a service restoration technique that uses optical path switching and intercentral office handover for E lambda AN to recover from disasters. The feasibility of the proposed service restoration technique is successfully demonstrated for the first time by using a prototype testbed of a metro-access network. By applying both orthogonal frequency division multiplexing and adaptive modulation, the system automatically changes the transmission parameters (modulation level, the number of subcarriers, and symbol rate) according to the service requirements and conditions of the optical distribution network, such as the link's end-to-end optical loss, in order to achieve accommodate multiple services. In the experiment, an optical network unit in a faulted system automatically reconnected within 10 s to another office 20-km away with the same throughput.

• 出版日期2018-4-15