The core network is experiencing bandwidth capacity constraints as internet traffic grows. As a result, the notion of a Multi-band flexible-grid optical network was established to increase the lifespan of an optical core network. In this paper, we use the C+L band for working traffic transmission and the S-band for protection against failure. Furthermore, we compare the proposed method with the existing ones.

翻译：随着互联网流量的持续增长，核心网络正面临带宽容量制约。为此，多波段灵活栅格光网络的概念被提出以延长光核心网络的使用寿命。本文采用C+L波段传输工作业务，并利用S波段实现故障保护。此外，我们将所提方法与现有方案进行了比较。