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This work investigates different network design considerations with respect to energy-efficiency, under green-field resilient multi-layer network deployment. The problem of energy efficient, reliable multi-layer network design is known to result in different trade-offs between key performance measures. In this complex problem, considerations such as client traffic granularity, applied grooming policies...
Core networks offer high capacities by harvesting the high bandwidth-distance product of optical technologies. However they consume a non-negligible amount of power, while their traffic volume is forecasted to grow at very high rates for the 10 or 15 coming years. Thus, energy-efficiency in core and metro networks is mandatory for the sustainability of the future Internet. In this context, in this...
This paper focuses on the design of multiple dependable virtual infrastructures (VIs) over converged optical network and IT resources supporting uncertain elastic cloud services. VI dependability is defined as the VI ability to offer resilience in the case of IT resource failures and security guarantees in terms of isolation of VIs that share a common physical infrastructure. The VI planning optimization...
This paper proposes stochastic planning suitable for elastic clouds deploying optical networking. A novel model employing stochastic traffic considerations for virtualization of the underlying physical resources is proposed and validated achieving significant cost savings.
This paper studies energy efficient planning of elastic cloud deploying optical network infrastructures. An MILP model employing multi-service, multi-period considerations for virtualization of the underlying physical resources is proposed and validated achieving significant energy savings.
In this paper we propose energy efficient design and operation of infrastructures incorporating integrated optical network and IT resources. For the first time we quantify significant energy savings of a complete solution jointly optimizing the allocation and provisioning of both network and IT resources. Our approach involves virtualization of the infrastructure resources and it is proposed and developed...
This paper studies energy efficient planning of multiple concurrent infrastructures incorporating integrated optical network and IT resources. An MILP model for virtualization of the underlying physical resources is proposed and validated achieving significant energy savings.
We propose a novel model for core optical networks combining benefits of transparent and opaque networks through variable channel spacing. We demonstrate increased capacity at limited energy cost through detailed transmission experiments and network planning.
New end-to-end architectures and sophisticated technology combinations are required to provide future cost-efficient networks. This necessitates new modeling approaches of CAPEX and OPEX to jointly optimize the total cost of ownership (TCO), which are introduced.
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