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Provision of adaptive guard band in elastic optical networks

Authors
  • Monteiro, Neclyeux S.1
  • Fontinele, Alexandre C.2
  • Campelo, Divanilson R.2
  • Soares, André1
  • 1 Departamento de Computação, Universidade Federal do Piauí, Teresina, PI, Brazil , Teresina (Brazil)
  • 2 Centro de Informática, Universidade Federal de Pernambuco, Recife, PE, Brazil , Recife (Brazil)
Type
Published Article
Journal
Journal of Internet Services and Applications
Publisher
Springer London
Publication Date
Oct 14, 2020
Volume
11
Issue
1
Identifiers
DOI: 10.1186/s13174-020-00126-3
Source
Springer Nature
Keywords
License
Green

Abstract

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.

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