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Journal of Electrical and Computer Engineering
Volume 2014, Article ID 683408, 12 pages
Research Article

Design of a Traffic-Aware Governor for Green Routers

Dipartimento di Ingegneria Elettrica, Elettronica e Informatica (DIEEI), University of Catania, Viale A. Doria 6, 95125 Catania, Italy

Received 7 November 2013; Revised 11 January 2014; Accepted 15 January 2014; Published 12 March 2014

Academic Editor: Vincenzo Eramo

Copyright © 2014 Alfio Lombardo et al. 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.


Today the reduction of energy consumption in telecommunications networks is one of the main goals to be pursued by manufacturers and researchers. In this context, the paper focuses on routers that achieve energy saving by applying the frequency scaling approach. The target is to propose an analytical model to support designers in choosing the main configuration parameters of the Router Governor in order to meet Quality of Service (QoS) requirements while maximizing energy saving gain. More specifically, the model is used to evaluate the input traffic impacts on the choice of the active router clock frequencies and on the overall green router performance. A case study based on the open NetFPGA reference router is considered to show how the proposed model can be easily applied to a real case scenario.