Photonic Network Communications

, Volume 28, Issue 1, pp 71–81 | Cite as

Renewable energy-aware grooming in optical networks

  • Thilo Schöndienst
  • Vinod M. Vokkarane


The optical layer of a network is the energy-efficient technology to provision high bandwidths for data transport. Unfortunately, occasional electronic processing is unavoidable in current networks. This process is much more energy-consuming than the optical transport. Recent research has already yielded great improvements in terms of energy efficiency. It is, however, observed that increased energy efficiency typically leads to higher overall energy consumption. Therefore, it is imperative to reduce the environmental impact by additional means: maximizing the use of renewable energy. We present an approach to greenhouse gas (GHG) emission-reducing grooming by considering the heterogeneous distribution of fossil and renewable energy sources. We analyze various two-step solutions for the route calculation and lightpath provisioning problem in IP-over-WDM mesh networks. We show that it is possible to reduce GHG emissions at a stable level of energy consumption and improved blocking performance compared to previous energy-efficient solutions.


Optical WDM network IP-over-WDM Grooming GHG emission Green RWA  Energy source awareness 



This work has been supported by the Department of Energy (DOE) COMMON project under grant DE-SC0004909 and the NSF CARGONET project under grant CNS-1406370.


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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  1. 1.Electrical and Computer Engineering DepartmentUniversity of Massachusetts LowellLowellUSA

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