Multi-Criteria, crosstalk-sensitive flexible topology approach for routing in SDM-EONs
In recent years, the demand for high-capacity, flexible optical networks has driven significant advancements in network design, especially within Space-Division Multiplexing Elastic Optical Networks (SDM-EONs). These networks are expected to efficiently handle the increasing volume of data traffic w...
| Autores: | , |
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| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2025 |
| País: | Brasil |
| Recursos: | Sociedade Brasileira de Computação (SBC) |
| Repositorio: | Journal of internet services and applications (Internet) |
| Idioma: | inglés |
| OAI Identifier: | oai:journals-sol.sbc.org.br:article/5041 |
| Acesso em linha: | https://journals-sol.sbc.org.br/index.php/jisa/article/view/5041 |
| Access Level: | acceso abierto |
| Palavra-chave: | Optical Networks Routing Space-Division Multiplexing Elastic Optical Networks |
| Resumo: | In recent years, the demand for high-capacity, flexible optical networks has driven significant advancements in network design, especially within Space-Division Multiplexing Elastic Optical Networks (SDM-EONs). These networks are expected to efficiently handle the increasing volume of data traffic while minimizing issues such as inter-core crosstalk and request blocking, which can degrade performance. To address these challenges, we propose an RMSSA (Routing, Modulation, Spectrum, and Space Assignment) approach specifically for SDM-EONs. Our method dynamically calculates link-weight across the network topology by considering a combination of critical network factors, enabling a flexible topology that self-balances network load prior to every incoming resource request. Next, our approach maps all slots in the spectrum guaranteed to not disrupt already allocated light-paths, while being under the crosstalk threshold for any desired modulation format, which is enabled by the adoption of precise slice-based crosstalk estimation (PS-XT). This multi-criteria, crosstalk-aware routing strategy significantly reduces inter-core crosstalk, leading to more efficient resource utilization and a considerable reduction in request blocking, ultimately enhancing the overall performance and reliability of SDM-EONs. Our comparative results show average reductions in request blocking of up to 77% for the load interval tested and up to 90% at lower loads, compared to approaches from the literature. Crosstalk was also reduced in over 36%, on average, and up to 60% at lower loads while fragmentation was mitigated in up to 11%. |
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