Quantifying Spectrum, Cost, and Energy Efficiency in Fixed-Grid and Flex-Grid Networks [Invited]

Palkopoulou, Eleni; Angelou, M.; Klonidis, Dimitrios; Christodoulopoulos, K.; Klekamp, A.; Buchali, Fred; Varvarigos, Emmanouel; Tomkos, Ioannis

doi:10.1364/jocn.4.000b42

Cited by 69 publications

(26 citation statements)

References 6 publications

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“…BV-T can combine a number of contiguous subcarriers modulated with the same format and allocated to serve a given bit-rate. A subcarrier occupies 12.5 GHz (Palkopoulou et al, 2012). The EON operates within a flexible ITU-T grid of 6.25 GHz granularity (ITU-T, 2012).…”

Section: 2mentioning

confidence: 99%

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A column generation technique for routing and spectrum allocation in cloud–ready survivable elastic optical networks

Goścień

Walkowiak

2017

International Journal of Applied Mathematics and Computer Science

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Driven by increasing user requirements and expectations, the fast development of telecommunications networks brings new challenging optimization problems. One of them is routing and spectrum allocation (RSA) of three types of network flows (unicast, anycast, multicast) in elastic optical networks (EONs) implementing dedicated path protection (DPP). In the paper, we model this problem as integer linear programming (ILP) and we introduce two new optimization approaches-a dedicated heuristic algorithm and a column generation (CG)-based method. Then, relying on extensive simulations, we compare algorithm performance with reference methods and evaluate CG efficiency in detail. The results show that the proposed CG method significantly outperforms reference algorithms and achieves results very close to optimal ones (the average distance to optimal results was at most 2.1%).

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Section: 2mentioning

confidence: 99%

“…The regenerators are located in network nodes and they do not perform spectrum/modulation conversion. A 12.5 GHz guard-band is used between neighbouring connections (Palkopoulou et al, 2012).…”

Section: 2mentioning

confidence: 99%

A column generation technique for routing and spectrum allocation in cloud–ready survivable elastic optical networks

Goścień

Walkowiak

2017

International Journal of Applied Mathematics and Computer Science

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“…On the other hand, in [4], spectrum and energy efficiency comparisons between fixed-grid and flex-grid networks show that the traffic load has a great impact on the network costs. In [5], the network planning is formulated as a multi-objective optimization problem with respect to the maximum spectrum and the cost of transponders used and presents Integer Linear Programming (ILP) models and heuristic algorithms to solve it.…”

Section: Related Workmentioning

confidence: 99%

Design cost and spectrum efficiency comparison of fixed-grid and flex-grid optical networks with grooming

Sousa

Lopes

Monteiro

2014

2014 16th International Telecommunications Network Strategy and Planning Symposium (Networks)

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-This paper deals with the design of optical networks aiming to minimize the design cost and the spectrum usage. We present an optimization method that is able to find the optimal solutions of relevant sized instances. We apply the method to realistic case studies. With the obtained solutions, we make a cost and spectrum efficiency comparison analysis between fixed-grid and flex-grid optical networks. The results show that flex-grid gains are significant over the fixed-grid alternatives only after the introduction of 400 Gbps line rates and marginal gains are obtained without this line rate.

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“…As redes EON possuem a característica de oferecerem granularidades de tráfego menores aproveitando melhor o uso do espectro e obtendo uma eficiência energética superior as redes tradicionais [70,71]. Todos esses motivos justificam a implantação dessa nova tecnologia nas redes ópticas atuais.…”

Section: Análises Opex E Capexunclassified

“…Estudos demonstram que as redes EON podem trazer vários benefícios em termos de custos para as redes ópticas [70,68,69]. Estas economias dependem em grande parte da granularidade da rede EON, do tráfego de rede adotado e do modelo de custo assumido.…”

Section: Análises De Custosunclassified

Potencializando a modulação adaptativa com roteamento em múltiplos saltos em redes ópticas elásticas

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Quantifying Spectrum, Cost, and Energy Efficiency in Fixed-Grid and Flex-Grid Networks [Invited]

Cited by 69 publications

References 6 publications

A column generation technique for routing and spectrum allocation in cloud–ready survivable elastic optical networks

A column generation technique for routing and spectrum allocation in cloud–ready survivable elastic optical networks

Design cost and spectrum efficiency comparison of fixed-grid and flex-grid optical networks with grooming

Potencializando a modulação adaptativa com roteamento em múltiplos saltos em redes ópticas elásticas

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