Leveraging Spectrum Sharing and Defragmentation to p -Cycle Design in Elastic Optical Networks

• Published in: IEEE communications letters 2017-03, Vol.21 (3), p.508-511
• Main Authors: Ju, Min, Zhou, Fen, Xiao, Shilin, Wu, Haitao
• Format: Article
• Language: English
• Subjects: Algorithm design and analysis; Computational modeling; defragmentation; elastic optical networks (EONs); Heuristic algorithms; Indexes; Optical fiber networks; Pre-configured cycle (<italic xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">p -cycle); Resource management; spectrum sharing; Wavelength division multiplexing
• ISSN: 1089-7798; 1558-2558
• DOI: 10.1109/LCOMM.2016.2633991

In this letter, a new protection technique, namely Spectrum Shared pre-configured cycles (SS-p-cycles), is proposed for survivable elastic optical networks. SS-p-cycles permit to cut spectrum usage and spectrum fragmentation ratio (SFR) by leveraging special spectrum sharing among multiple p-cycles that have common link(s). To compute SS-p-cycles, we first formulate an integer linear programming model to obtain the optimal solution in small instance, and then develop a time-efficient heuristic algorithm to solve large-scale instances. Simulation results have demonstrated that the proposed SS-p-cycles outperform conventional p-cycles without spectrum sharing in terms of spectrum usage and SFR.