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Energies 2016, 9(10), 837; doi:10.3390/en9100837

Spatial and Temporal Traffic Variation in Core Networks: Impact on Energy Saving and Devices Lifetime

1
Faculty of Electronics and Telecommunications, Poznan University of Technology, Poznań 60-965, Poland
2
Zuse Institut Berlin, Berlin 14195, Germany
3
Department of Electronics, University of Rome Tor Vergata, Rome 00133, Italy
This paper is an extended version of our paper published in Idzikowski, F.; Pfeuffer, F.; Werner, A.; Chiaraviglio, L. Impact of Spatial Traffic Variation on Energy Savings and Devices Lifetime in Core Networks. In Proceedings of the IEEE HPSR 2016, Yokohama, Japan, 14–17 June 2016.
*
Author to whom correspondence should be addressed.
Academic Editor: William Holderbaum
Received: 1 June 2016 / Revised: 20 September 2016 / Accepted: 11 October 2016 / Published: 19 October 2016
(This article belongs to the Special Issue Energy-Efficient and Sustainable Networking)
View Full-Text   |   Download PDF [558 KB, uploaded 19 October 2016]   |  

Abstract

We assess the impact of traffic variations on energy consumption and devices lifetime in a core network. Specifically, we first define a model to control the spatial as well as the temporal variations of traffic. We generate different sets of traffic matrices by adopting our model, which are then used as input to an energy-aware algorithm, with the aim of finding the set of Line Cards (LCs) in Sleep Mode (SM) for each traffic matrix. Given this output, we are able to compute different evaluation metrics, including: the total energy consumption, the normalized lifetime as a consequence of activation/deactivation of network devices, and the total network profitability (i.e., the monetary gain/loss for the operator). Our results show that the temporal variation of traffic affects the LCs energy consumption, but has a limited impact on their lifetime. Moreover, the spatial variation of traffic is no obstacle for energy saving. Eventually, the frequency of the power cycles, introduced by the energy-aware algorithm, is particularly important for the lifetime of LCs. Finally, we show that positive total profitability is achieved in most of the considered cases. View Full-Text
Keywords: optical networks; green networking; energy efficiency; devices lifetime; traffic modeling optical networks; green networking; energy efficiency; devices lifetime; traffic modeling
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Idzikowski, F.; Pfeuffer, F.; Werner, A.; Chiaraviglio, L. Spatial and Temporal Traffic Variation in Core Networks: Impact on Energy Saving and Devices Lifetime. Energies 2016, 9, 837.

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