Link-Level Resource Allocation for Flexible-Grid Nonlinear Fiber-Optic Communication Systems
Link-Level Resource Allocation for Flexible-Grid Nonlinear Fiber-Optic Communication Systems
复制标题
灵活网格非线性光纤通信系统的链路级资源分配
DOI：
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复制
发表时间：
2015
影响因子：
2.6
通讯作者：
M. Brandt
中科院分区：
文献类型：
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作者：
Li Yan;E. Agrell;H. Wymeersch;P. Johannisson;R. Di Taranto;M. Brandt
传输光网络的资源分配传统上使用传输范围约束来估计物理损伤。对于灵活网格网络，由于不同的调制和带宽可以在同一链路上共存，因此传输范围不能充分表征非线性损伤。我们提出了一种基于非线性信号失真模型的单个灵活网格光纤链路的资源分配算法，作为全网络设计的第一步。制定优化问题以提供接近最优的资源分配，从而保证每个信道的传输质量。与基于传输范围的简单算法相比，我们提出的算法显示了带宽节省的潜力。它被证明对通道顺序不敏感。
Resource allocation for transport optical networks has traditionally used a transmission reach constraint to estimate physical impairments. For flexible-grid networks, nonlinear impairments are not sufficiently well characterized by the transmission reach since various modulations and bandwidths can coexist on the same link. We propose a resource allocation algorithm for a single flexible-grid fiber link based on a nonlinear signal distortion model, as a first step toward whole-network design. An optimization problem is formulated to provide a close-to-optimal resource allocation that guarantees the quality of transmission for every channel. Compared with a simpler algorithm based on transmission reach, our proposed algorithm shows the potential of bandwidth savings. It is demonstrated to be insensitive to channel ordering.