Transparent vs Translucent Multi-Band Optical Networking: Capacity and Energy Analyses
Transparent vs Translucent Multi-Band Optical Networking: Capacity and Energy Analyses
复制标题
透明与半透明多频段光网络：容量和能量分析
DOI：
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发表时间：
2022
影响因子：
4.7
通讯作者：
V. Curri
中科院分区：
文献类型：
--
作者：
R. Sadeghi;B. Correia;André Souza;N. Costa;J. Pedro;A. Napoli;V. Curri
多频带光纤传输通常被提出用于光传送网络中的容量升级。为了全面评估多频段传输的潜力，必须针对不同的传输场景评估诸如潜在容量增加、能耗和所需接口数量等关键指标。我们考虑渐进式光谱开发，从C波段开始，直到C+L+S+ U波段传输，用于利用光信号再生的透明和半透明解决方案。通过考虑准确的最先进的物理层模型，我们得出一个网络性能指标，使不同的解决方案的容量分配和能源消耗方面的比较。对于半透明网络设计，不同的再生器放置算法进行了比较，以最小化能源消耗的目的。拟议的网络范围内的数值分析表明，对于超过C+ L波段的频谱占用，半透明解决方案可以显着增加网络容量，同时导致与透明设计情况下类似的每传输比特能耗，但它们需要部署额外的线路接口。值得注意的是，这些结果提供了证据表明，透明利用额外的传输频带产生的容量增量至少与基于已使用频带的半透明解决方案相当。由于这是以较少的线路接口为代价实现的，因此这是一个关键的发现，表明扩展支持的频带数量是扩展现有光纤基础设施容量的一种具有成本效益的方法。
Multi-band optical fiber transmission is generally proposed for capacity upgrades in optical transport networks. To comprehensively assess the potential of multi-band transmission, key metrics such as the potential capacity increase, energy consumption, and the number of required interfaces must be evaluated for different transmission scenarios. We consider progressive spectral exploitation, starting from the C-band only and up to C+L+S+U-band transmission, for both transparent and translucent solutions that exploit optical signal regeneration. By considering accurate state-of-the-art physical layer models, we derive a networking performance metric that enables the comparison of different solutions in terms of capacity allocation and energy consumption. For a translucent network design, different regenerator placement algorithms are compared, with the aim of minimizing energy consumption. The proposed network-wide numerical analysis shows that, for spectral occupations exceeding the C+L-band, translucent solutions can significantly increase network capacity, while leading to a similar energy consumption per transmitted bit as in the transparent design case, but they require the deployment of additional line interfaces. Significantly, these results provide evidence that the transparent exploitation of an additional transmission band produces a capacity increment that is at least comparable to that of a translucent solution based on already-in-use bands. Since this is attained at the expense of fewer line interfaces, it is a key finding suggesting that extending the number of bands supported is a cost-effective approach to scaling the capacity of existing fiber infrastructures.