全局并发优化:基于灵活网格的网络的优势和机遇

A. Castro, Luis Velasco, J. Comellas, G. Junyent
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引用次数: 0

摘要

在未来的柔性网格核心网络中,光路的数量可能会显著增加,这是使用光谱时更细粒度的结果。可以将不同的频谱带宽分配给每个光路,作为要传输的比特率量和所使用的调制格式等的函数。因此,可能会出现频谱碎片化,导致资源的非最优利用。此外,光纤链路的故障可能会触发数百甚至数千个对集中式路径计算元素(PCE)的路径计算请求。后面的例子可以从最近标准化的全局并发优化(GCO)中获益,它增强了PCE的计算能力。在本文中,我们提出了利用PCE+GCO架构的两个机会:频谱碎片整理和恢复。
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Global concurrent optimization: Advantages and opportunities in flexgrid-based networks
In future flexgrid core networks the amount of lightpaths might increase significantly as a consequence of the finer granularity in the use of the optical spectrum. Different spectrum bandwidth can be allocated to each lightpath as a function of, among others, the bitrate amount to be conveyed and the modulation format used. As result, spectrum fragmentation might appear leading to non-optimal resource utilization. In addition, a failure in a fibre link could trigger hundreds, or even thousands, of path computations requests to a centralized Path Computation Element (PCE). Latter examples can benefit from using the recently standardized Global Concurrent Optimization (GCO), which enhances PCE's computation capabilities. In this paper we present two opportunities to take advantage of the PCE+GCO architecture: spectrum defragmentation and restoration.
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