2013
DOI: 10.1109/jsac.2013.130104
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Elastic Spectrum Allocation for Time-Varying Traffic in FlexGrid Optical Networks

Abstract: Elastic flexgrid optical networks (FG-ON) are considered a very promising solution for next-generation optical networks. In this article we focus on lightpath adaptation under variable traffic demands in FG-ON. Specifically, we explore the elastic spectrum allocation (SA) capability of FG-ON and, in this context, we study the effectiveness of three alternative SA schemes in terms of the network performance. To this end, we formulate a Multi-Hour Routing and Spectrum Allocation (MH-RSA) optimization problem and… Show more

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Cited by 137 publications
(75 citation statements)
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“…The spectrum allocation to time-varying traffic connections as indicated by several studies [10,12] is an ILP optimization problem. It is also known to be np-hard when the network size increases.…”
Section: B Spectrum Allocation For Time-varying Trafficmentioning
confidence: 99%
See 2 more Smart Citations
“…The spectrum allocation to time-varying traffic connections as indicated by several studies [10,12] is an ILP optimization problem. It is also known to be np-hard when the network size increases.…”
Section: B Spectrum Allocation For Time-varying Trafficmentioning
confidence: 99%
“…The first studies of spectrum resources allocation to time-varying traffic connections deals with the methods of expansion/contraction of frequency slots, based on the constraint that two adjacent connections must not use the same frequency slots simultaneously in the same time slot. In this way, the paper [12] provides three policies of spectrum expansion/contraction depending on the fluctuation in traffic. These policies differ from one to other by the limitations suffered by the reference frequency and the allocated spectrum band width.…”
Section: B Spectrum Allocation For Time-varying Trafficmentioning
confidence: 99%
See 1 more Smart Citation
“…The use of advanced transmission and modulation techniques, spectrum-selective switching technologies, and flexible frequency grids (flexgrids), will allow next-generation optical networks to be spectrally efficient and, in terms of optical bandwidth provisioning, scalable and elastic [2], [3], [4]. Among key concepts implemented in flexgrid elastic optical networks (EONs) we can distinguish distance-adaptive modulation format assignment [5] and multi-carrier (i.e., superchannel, abbreviated as SCh) transmission [6].…”
Section: Introductionmentioning
confidence: 99%
“…In the literature, mixed-integer programming (MIP) formulations (e.g., [7], [8], [10]), metaheuristics (e.g., [3], [11], [12]), and heuristics (e.g., [8], [13]), have been proposed to solve RSA. (Meta)heuristics can produce locally optimal solutions, however, without guarantees for global optimality.…”
Section: Introductionmentioning
confidence: 99%