Green optical orthogonal frequency-division multiplexing networks
- Author(s): Taisir E.H. El-Gorashi 1 ; Xiaowen Dong 2 ; Jaafar M.H. Elmirghani 1, 3
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View affiliations
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Affiliations:
1:
School of Electronic and Electrical Engineering, University of Leeds, Leeds LS2 9JT, UK;
2: Shannon Laboratory, Huawei Technologies Co., Ltd, Huawei Industrial Base, Bantian Longgang District, Shenzhen, People's Republic of China;
3: Department of Electrical and Computer Engineering, King Abdulaziz University, Jeddah, Kingdom of Saudi Arabia
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Affiliations:
1:
School of Electronic and Electrical Engineering, University of Leeds, Leeds LS2 9JT, UK;
- Source:
Volume 8, Issue 3,
June 2014,
p.
137 – 148
DOI: 10.1049/iet-opt.2013.0046 , Print ISSN 1751-8768, Online ISSN 1751-8776
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(http://creativecommons.org/licenses/by/3.0/)
Orthogonal frequency-division multiplexing (OFDM) has been proposed as an enabling technique for elastic optical networks to support heterogeneous traffic demands by enabling rate and modulation adaptive bandwidth allocation. The authors investigate the energy efficiency of optical OFDM-based networks. A mixed integer linear programming model is developed to minimise the total power consumption of rate and modulation adaptive optical OFDM networks. Considering a symmetric traffic, the results show that optical OFDM-based networks can save up to 31% of the total network power consumption compared to conventional Internet protocol over wavelength division multiplexing (WDM) networks. Considering the power consumption of the optical layer, the optical OFDM-based network saves up to 55% of the optical layer power consumption. The results also show that under an asymmetric traffic scenario, where more traffic is destined to or originates from popular nodes, for example data centres, the power savings achieved by the optical OFDM-based networks are limited as the higher traffic demands to and from data centres reduce the bandwidth wastage associated with conventional WDM networks. Furthermore, the achievable power savings through data compression have been investigated, considering an optical OFDM-based network.
Inspec keywords: bandwidth allocation; optical communication; optical fibre networks; power consumption; energy conservation; integer programming; linear programming; OFDM modulation
Other keywords: optical layer power consumption; OFDM; data centres; green optical orthogonal frequency-division multiplexing networks; wavelength division multiplexing networks; elastic optical networks; heterogeneous traffic demands; mixed integer linear programming model; energy efficiency; Internet protocol; network power consumption; rate adaptive bandwidth allocation; modulation adaptive bandwidth allocation; WDM; bandwidth wastage; power savings; symmetric traffic
Subjects: Optimisation techniques; Optical fibre networks; Multiplexing and switching in optical communication
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