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Optical Switching and Networking (2011) 1 Abstract--Greening of the Internet has become one of the

Summary: Optical Switching and Networking (2011) 1
Abstract-- Greening of the Internet has become one of the
main challenges for the research community. Optical networks
can provide an energy efficient solution, but it has become crucial
to assess its power efficiency. In this context, dynamic operation
of WDM networks is expected to provide significant power
savings when compared to static operation; however, its benefits
need to be evaluated to determine its actual impact and to
analyze future trends. In this paper, a general framework for
evaluating energy consumption in WDM networks is introduced.
The proposed framework enables the analysis of different node
architectures, link capacities and network topologies. In
particular, the case of three different node architectures is
discussed and compared. Results show that dynamic operation
can significantly reduce power consumption when either the
traffic load is below 0.4 or when short reach transponders
consume significantly lower power than long reach ones. In the
latter case, dynamic operation shows significant benefits
compared to the static case for traffic loads higher than 0.4. It is
also shown that the transponders of the input/output stage of the


Source: Rico, Javier Aracil - Departamento de Ingeniería Informática, Universidad Autonoma de Madrid


Collections: Computer Technologies and Information Sciences