Flexible Optical Networks: An Energy Efficiency Perspective

Autor:	Hamid Khodakarami, William Shieh, Behnam Sedighi, Bipin Sankar Gopalakrishna Pillai
Rok vydání:	2014
Předmět:	Engineering Optical fiber business.industry Amplifier Optical communication Link adaptation Optical performance monitoring Atomic and Molecular Physics and Optics Frequency allocation law.invention Traffic grooming law Electronic engineering business Efficient energy use
Zdroj:	Journal of Lightwave Technology. 32:3958-3969
ISSN:	1558-2213 0733-8724
DOI:	10.1109/jlt.2014.2332360
Popis:	High energy efficiency is expected to become a mandatory design criterion in optical networks of the future. This paper investigates schemes for enhancing the energy efficiency of core optical networks based on multicarrier transmission. Such networks of the future will incorporate flexible techniques, namely: 1) adaptive modulation and coding, 2) flexible spectrum allocation, 3) wavelength conversion, and 4) traffic grooming. We investigate the problem of energy efficient routing and spectrum allocation in core optical networks incorporating these flexible techniques. We propose a heuristic solution that provides an energy minimized design of long-haul optical networks by avoiding under-utilization of network resources such as optical fibers, transponders, and amplifiers. A fixed architecture that does not employ the aforementioned flexible techniques is used as a benchmark for comparison. The numerical results in the west European (24-node US) core optical network show that the energy efficiency of the flexible architecture can outperform the fixed architecture by a factor of 4.2 (6.4) for low and 1.8 (1.9) for high traffic demands, respectively.
Databáze:	OpenAIRE
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