Flexible grid Optical Networks are efficient mechanism to provide flexibility in the optical spectrum utilization. For such networks, the slot width size as specified by the ITU-T G.694.1 is 12.5 GHz. However, one should question if it is the optimal grid size? In this paper, under different bandwidth distribution scenarios, we review which slot size give appropriate spectrum efficiency. Moreover, we present a study of the slot sizes with varying incoming traffic having some bandwidth requirement under different scenarios.

翻译：灵活网格光学网络是提供光谱利用灵活性的有效机制。对于这类网络,ITU-T G.694.1规定的空格宽度为12.5千兆赫。然而,人们应该问这是不是最佳网格大小?在本文件中,在不同带宽分布设想下,我们审查哪个空格大小能适当提高频谱效率。此外,我们提出对不同空格大小的研究,不同空格的空格长度不同,对不同的频谱要求有一定带宽要求。