Francesco Musumeci

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Energy saving in telecommunications networks has become a well established topic in the research community. We look at the electrical and optical layers of IP-over-WDM networks, and present a list of evaluation criteria for the Energy-Aware Adaptive Routing Solutions (EA-ARSs) from the perspective of a network operator. Furthermore, we briefly explain the(More)
—Reducing the Internet power consumption will become a challenging issue, since the Internet is expected to face a high growth in terms of traffic requirements. Simply scaling the network architecture, thus increasing its power consumption, proportionally to this growth would not be a practical solution. Various energy-efficient approaches have been(More)
Keywords: Cost evaluation Elastic optical networks Energy efficiency Flexible-grid networks Flexible rate transponders Optical OFDM Protection schemes Routing and wavelength assignment Routing Modulation level and spectrum allocation a b s t r a c t The ever-increasing Internet traffic demand introduces new challenges for telecommunications carriers.(More)
Recently, the need for energy-efficient and sustainable capacity growth has become stringent for telecommunication networks and great efforts have been produced to reduce their power consumption. Optical technologies based on Wavelength Division Multiplexing are well-recognized as a promising solution for greening the future Internet. One relevant approach(More)
—The huge energy consumption of datacenters providing cloud services over the Internet has motivated different studies regarding cost savings in datacenters. Since energy expenditure is a predominant part of the total operational expenditures for datacenter operators, energy aware policies for minimizing datacenters' energy consumption try to minimize(More)
⎯ Traditional optical core networks based on Wavelength Division Multiplexing (WDM) provide optical channels (wavelengths) rigidly allocated over the optical spectrum and separated by 50 or 100 GHz. The novel concept of Elastic Optical Network (EON) can help to improve network flexibility by allocating multiple sub-channels to incoming connection requests(More)
—While telecommunication networks have historically been dominated by a circuit-switched paradigm, the last decades have seen a clear trend towards packet-switched networks. In this paper we evaluate how both paradigms perform in optical backbone networks from a power consumption point of view, and whether the general agreement of circuit switching being(More)
—Recently, great efforts have been made to reduce power consumption in optical networks. The adoption of the Wavelength Division Multiplexing (WDM) technique is expected to enable greener data transport, especially considering the envisioned increase of traffic requirements. One main approach used to achieve power savings consists in aggregating, especially(More)
With one third of the world population online in 2013 and an international Internet bandwidth multiplied by more than eight since 2006, the ICT sector is a non-negligible contributor of worldwide greenhouse gases emissions and power consumption. Indeed, power consumption of telecommunication networks has become a major concern for all the actors of the(More)
—Future telecommunication networks will be designed to guarantee energy-efficiency and sustainability. Optical networks , given their capability to switch and transport large traffic amounts for a relatively-limited energy consumption, are expected to play an increasingly important role in the evolution towards energy efficiency. While traditional optical(More)