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首页> 外文期刊>IEEE communications letters >Influence of Physical Layer Configuration on Performance of Elastic Optical OFDM Networks
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Influence of Physical Layer Configuration on Performance of Elastic Optical OFDM Networks

机译：物理层配置对弹性光OFDM网络性能的影响

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摘要

We study how the physical layer characteristics and novel digital impairment mitigation techniques impact the performance of elastic optical OFDM networks. The relationship between bandwidth blocking ratio (BBR) and fiber type, span length, dispersion management, FEC and intra-channel nonlinearity compensation are evaluated through cross-layer network simulations, which integrate closed-form expressions of quality of transmission into routing, modulation level and spectrum allocation (RMSA). An adaptive FEC assisted RMSA is proposed and proved to improve the network performance by optimizing the FEC overhead assignment for individual paths. Numerical simulations also show considerable performance improvement by deploying shorter span-length fiber links without dispersion management, and imperceptible influence of intra-channel nonlinearity compensation for flexible grid networks under very heavy traffic. These results provide valuable suggestions for physical layer fiber deployment and application of novel impairment mitigation techniques on elastic optical networks, such as intra-channel nonlinearity compensation as well as soft-decision FEC.
机译：我们研究物理层特性和新颖的数字减损技术如何影响弹性光学OFDM网络的性能。通过跨层网络仿真评估带宽阻塞率（BBR）与光纤类型，跨度长度，色散管理，FEC和通道内非线性补偿之间的关系，该仿真将传输质量的封闭形式表达集成到路由，调制级别中和频谱分配（RMSA）。提出了一种自适应FEC辅助的RMSA，并通过优化单个路径的FEC开销分配来改善网络性能。数值模拟还显示出通过部署更短的跨长度光纤链路而不进行色散管理，以及在非常繁忙的流量下对柔性网格网络的通道内非线性补偿的不可察觉的影响，可以显着提高性能。这些结果为物理层光纤的部署和在弹性光网络上应用新的减损技术提供了有价值的建议，例如通道内非线性补偿以及软判决FEC。

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