Elastic Optical Networking: Roles and Benefits in Beyond 100-Gb/s Era
Elastic Optical Networking: Roles and Benefits in Beyond 100-Gb/s Era
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DOI：
10.1109/jlt.2016.2642480
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发表时间：
2017-03
影响因子：
4.7
通讯作者：
M. Jinno
中科院分区：
文献类型：
--
作者：
M. Jinno
频谱高效的多载波高阶调制和带宽可变波长选择开关等新兴技术导致光网络架构在比特率、中心频率间隔、调制格式和光传输距离方面从刚性、同质向灵活、异构转变。弹性光网络（EON）是一种迈向超越100Gb/s时代的网络架构。本教程论文回顾了弹性光网络技术，并介绍了其在新时代的作用和优势，其中城域/核心光网络的主要线路速率为 100 Gb/s 及以上。 EON的主要特点是通过速率自适应超级通道和距离自适应调制以网络方式提高频谱效率，并在光域提供经济高效的流量疏导。 EON概念已被工业界和学术界广泛接受。重大的标准化工作已经取得了巨大的进步，灵活的网格和灵活的 OTUCn 帧格式建议就证明了这一点。诸如可切片多流转发器之类的硬件虚拟化与新兴的灵活客户端合作将是实现更灵活和更具成本效益的下一代光网络的关键。
Emerging technologies such as spectrally efficient multicarrier higher order modulation and bandwidth variable wavelength selective switches have led to a change in the optical network architecture from rigid and homogeneous to flexible and heterogeneous in terms of the bit rate, center frequency spacing, modulation format, and optical reach. The elastic optical network (EON) is a network architecture toward beyond the 100-Gb/s era. This tutorial paper reviews elastic opticalnetworking technology and presents its roles and benefits in a new era, where major line rates in metro/core optical networks are 100 Gb/s and beyond. The main features of the EON are that it increases the spectral efficiency in a network manner through rate-adaptive superchannels and distance-adaptive modulation, and it provides cost- and energy-efficient traffic grooming in the optical domain. The EON concept has been widely accepted by industry and academia. Significant standardization efforts have yielded great advances evidenced by the flexible grid and the flexible OTUCn frame format recommendations. Hardware virtualization such as a sliceable multiflow transponder in cooperation with emerging flexible clients will be key to achieving more flexible and cost-effective next generation optical networks.