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<p>Elastic Optical Networks (EONs) are considered a promising architecture for next-generation optical transport systems. Nevertheless, failure events can lead to significant data loss, motivating the development of advanced protection and restoration mechanisms. This work introduces a survivability strategy that enables controlled bandwidth degradation and restoration delay for low-priority connections, allowing them to be rerouted through the backup paths reserved for high-priority traffic. Comparative evaluations against conventional dedicated backup-path protection demonstrate the superior performance of the proposed method, particularly highlighting the reduction in blocking probability enabled by the differentiated degradation policy.</p>

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Hybrid protection and restoration strategy for disaster-resilient EONs with differentiated degradation

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年6月3日

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  • Tatiana de Oliveira Silva,
  • Augusto de Oliveira Perin,
  • Eonassis de Oliveira Santos,
  • Juliana de Santi,
  • Gustavo Bittencourt Figueiredo

摘要

Elastic Optical Networks (EONs) are considered a promising architecture for next-generation optical transport systems. Nevertheless, failure events can lead to significant data loss, motivating the development of advanced protection and restoration mechanisms. This work introduces a survivability strategy that enables controlled bandwidth degradation and restoration delay for low-priority connections, allowing them to be rerouted through the backup paths reserved for high-priority traffic. Comparative evaluations against conventional dedicated backup-path protection demonstrate the superior performance of the proposed method, particularly highlighting the reduction in blocking probability enabled by the differentiated degradation policy.