Elastic optical networks are a network infrastructure capable of withstanding the high demand for data traffic from high-speed networks. One of the problems that must be solved to ensure the smooth functioning of the network is called Routing, Modulation Level and Spectrum Assignment (RMLSA). This work aims to propose a new approach to this problem with an algorithm to select the guard band in an adaptive way. Two algorithms for the adaptive selection of the guard band, called Guard Band according to Use of the Network (GBUN) and Guard Band by OSNR Margin (GBOM), are presented. The GBUN algorithm performs the guard band selection based on the usage level of network. On the other hand the GBOM algorithm uses an Optical Signal to Noise Ratio (OSNR) margin for the selection of the guard band. The performances of the proposed algorithms are compared with algorithms that use fixed guard band values and the adaptive proposal AGBA. The results showed that the GBOM algorithm presented a better performance in terms of bandwidth blocking probability for the studied scenarios. In general, GBOM also presents a better energy efficiency when compared to the other algorithms.

中文翻译：

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在弹性光网络中提供自适应保护带

弹性光网络是一种网络基础结构，能够承受来自高速网络的高数据流量需求。确保网络平稳运行所必须解决的问题之一就是路由，调制级和频谱分配（RMLSA）。这项工作旨在通过一种以自适应方式选择保护带的算法，提出一种解决该问题的新方法。提出了两种自适应选择保护带的算法，分别称为根据网络使用的保护带（GBUN）和OSNR余量的保护带（GBOM）。GBUN算法根据网络的使用级别执行保护频带选择。另一方面，GBOM算法使用光信噪比（OSNR）余量来选择保护频带。将所提出算法的性能与使用固定保护带值和自适应提议AGBA的算法进行比较。结果表明，对于所研究的场景，GBOM算法在带宽阻塞概率方面表现出更好的性能。通常，与其他算法相比，GBOM还具有更好的能效。