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)
—In the next 10 to 15 years the Internet will undergo a substantial increase especially with respect to the bandwidth required by end-users. Since the current Internet already consumes a not-negligible percentage of the total world electricity, reducing the energy consumption of telecom networks is expected to become an increasingly-important challenge,(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)
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)
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)
—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)
—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)
BACKGROUND The prosthesis used for aortic valve replacement in patients with small aortic root can be too small in relation to body size, thus showing high transvalvular gradients at rest and/or under stress conditions. This study was carried out to evaluate rest and Dobutamine stress echocardiography (DSE) hemodynamic response of 17-mm St. Jude Medical(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)