Dynamic crosstalk-aware lightpath provisioning in spectrally-spatially flexible optical networks
Dynamic crosstalk-aware lightpath provisioning in spectrally-spatially flexible optical networks
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DOI：
10.1364/jocn.11.000213
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发表时间：
2019-04
期刊：
影响因子：
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通讯作者：
M. Klinkowski;Grzegorz Zalewski
中科院分区：
文献类型：
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作者：
M. Klinkowski;Grzegorz Zalewski
我们专注于在一个动态的，光谱和空间灵活的光网络，其中光谱超信道进行多芯光纤与距离自适应传输的串扰感知光路供应的问题。该问题涉及建立用于连接的光路，使得新光路与任何退出光路之间的芯间串扰（XT）不会导致这些光路中的任何光路的传输质量低于可接受水平。为此，我们分析和比较两大类计划，旨在确保可接受的XT水平的网络。第一个是基于静态/最坏情况的XT，而第二个使用动态/精确的XT估计。这些方法是在一个动态的XT感知路由，空间模式和频谱分配算法，有效地解决了光路供应问题，最大限度地减少带宽阻塞的目标。在现实的网络场景中进行的广泛的仿真实验表明，所利用的XT估计方法对网络性能有显着的影响，精确的XT方法优于最坏情况下的XT策略。
We focus on the problem of crosstalk-aware lightpath provisioning in a dynamic, spectrally and spatially flexible optical network, in which spectral super-channels are carried over multi-core fibers with distance-adaptive transmission. The problem involves establishing a lightpath for a connection such that the inter-core crosstalk (XT) between the new lightpath and any exiting lightpaths does not cause the quality of transmission of any of these light-paths to be below an acceptable level. To this end, we analyze and compare two broad classes of schemes that aim to ensure acceptable XT levels in the network. The first is based on static/worst-case XT, whereas the second uses dynamic/ precise XT estimation. These methods are implemented in a dynamic XT-aware routing, spatial mode, and spectrum allocation algorithm that solves the lightpath-provisioning problem efficiently with the goal of minimizing bandwidth blocking. Extensive simulation experiments performed in realistic network scenarios indicate that the utilized XT estimation methodology has a significant impact on network performance, with the precise XT approach favored over the worst-case XT strategy.