Flexible grid networks need rigorous resource planning to avoid network over-dimensioning and resource over-provisioning. The network must provision the hardware and spectrum resources statically, even for dynamic random bandwidth demands, due to the infrastructure of flexible grid networks, hardware limitations, and reconfiguration speed of the control plane. We propose a flexible online–offline probabilistic (FOOP) algorithm for the static spectrum assignment of random bandwidth demands. The FOOP algorithm considers the probabilistic nature of random bandwidth demands and balances hardware and control plane pressures with spectrum assignment efficiency. The FOOP algorithm uses the probabilistic spectrum Gaussian noise (PSGN) model to estimate the physical-layer impairment (PLI) for random bandwidth traffic. Compared to a benchmark spectrum assignment algorithm and a widely applied PLI estimation model, the proposed FOOP algorithm using the PSGN model saves up to 49% of network resources.

中文翻译：

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灵活网格光网络中用于动态流量的跨层静态资源供应

灵活的网格网络需要严格的资源计划，以避免网络规模过大和资源过度配置。由于灵活的网格网络的基础结构，硬件限制以及控制平面的重新配置速度，即使对于动态随机带宽需求，网络也必须静态地提供硬件和频谱资源。对于随机带宽需求的静态频谱分配，我们提出了一种灵活的在线-离线概率（FOOP）算法。FOOP算法考虑了随机带宽需求的概率性质，并在硬件和控制平面压力与频谱分配效率之间取得了平衡。FOOP算法使用概率谱高斯噪声（PSGN）模型来估计随机带宽流量的物理层损伤（PLI）。