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In this work, we analyze the design of green routing algorithms and evaluate the achievable energy savings that such mechanisms could allow in several realistic network scenarios. We formulate the problem as a minimum energy routing optimization, which we numerically solve considering a core-network scenario, which can be seen as a worst-case for energy saving performance (as nodes cannot be switched...
We present a concrete methodology for saving energy in future and contemporary cellular networks. It is based on re-arranging the user-cell association so as to allow shutting down under-utilized parts of the network. We consider a hypothetical static case where we have complete knowledge of stationary user locations and thus the results represent an upper bound of potential energy savings. We formulate...
We present an algorithm to define the physical topology and the specification of the optical devices that should be deployed in a network to minimize simultaneously the total capital cost and the network blocking probability.
In this paper we propose a methodology based on an evolutionary multiobjective optimization algorithm for the problem of up-grading (expansion) the physical topology of transparent optical networks. The aim is to define the new topology layout and the specification of the new optical devices that should be deployed in an existing network in order to improve its performance, considering simultaneously...
It is a challenge to provide service quality features in overlay networks, including quality of service (QoS), traffic engineering (TE), and failure recovery (FR). This is largely due to lack of information about the underlying resource availability and topology. In this paper, we develop a family of optimization-based distributed traffic control laws to meet this challenge. This family of control...
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