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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)
We propose an adaptive algorithm, the Energy Watermark Algorithm (EWA), to reduce the power consumption of Internet Protocol (IP)-over-Wavelength Division Multiplexing (WDM) networks. After presenting a network model and a detailed description of the EWA, we perform a sensitivity analysis and evaluate the performance of the algorithm considering real(More)
—We tackle the problem of reducing power consumption in the Internet Protocol (IP)-over-Wavelength Division Multiplexing (WDM) networks, targeting the power-aware Logical Topology Design (LTD). Unlike the previous work in the literature, our solution minimizes the power consumption and the cost (in terms of reconfigured traffic) incurred when the network is(More)
(MILP) model, we propose an efficient heuristic to solve the problem up to medium-sized networks. The proposed heuris-tic requires at most 30% of additional power w.r.t. the optimal solution, but with a significantly reduced complexity. We show that the largest power consumption is due to line cards and routers rather than WDM equipment. Furthermore, we(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)
—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)
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)
—We study the problem of reducing power consumption in an Internet Service Provider (ISP) network by designing the content distribution infrastructure managed by the operator. We propose an algorithm to optimally decide where to cache the content inside the ISP network. We evaluate our solution over two case studies driven by operators feedback. Results(More)