Cross-layer enabled translucent optical network with real-time impairment awareness

Pedrola, Oscar; Bathula, Balagangadhar G.; Wang, Michael S.; Ahsan, Atiyah; Careglio, Davide; Bergman, Keren

doi:10.1109/glocom.2012.6503555

Cited by 2 publications

(1 citation statement)

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“…Through realtime monitoring of physical layer parameters (in this case OSNR), we show through simulations that it is possible to achieve greater energy efficiency and optimized network performance. The contents of this chapter have been published in [23], and an extension including an experimental validation will be submitted to [24] in October 2012. This work was done within the framework of a 10-months Ph.D internship (FPU mobility grant) in the LRL lab.…”

Section: Thesis Contributions and Structurementioning

confidence: 99%

Cross-layer modeling and optimization of next-generation internet networks

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Scaling traditional telecommunication networks so that they are able to cope with the volume of future traffic demands and the stringent European Commission (EC) regulations on emissions would entail unaffordable investments. For this very reason, the design of an innovative ultra-high bandwidth power-efficient network architecture is nowadays a bold topic within the research community. So far, the independent evolution of network layers has resulted in isolated, and hence, far-from-optimal contributions, which have eventually led to the issues today's networks are facing such as inefficient energy strategy, limited network scalability and flexibility, reduced network manageability and increased overall network and customer services costs. Consequently, there is currently large consensus among network operators and the research community that cross-layer interaction and coordination is fundamental for the proper architectural design of next-generation Internet networks. This thesis actively contributes to the this goal by addressing the modeling, optimization and performance analysis of a set of potential technologies to be deployed in future cross-layer network architectures. By applying a transversal design approach (i.e., joint consideration of several network layers), we aim for achieving the maximization of the integration of the different network layers involved in each specific problem. To this end, Part I provides a comprehensive evaluation of optical transport networks (OTNs) based on layer 2 (L2) sub-wavelength switching (SWS) technologies, also taking into consideration the impact of physical layer impairments (PLIs) (L0 phenomena). Indeed, the recent and relevant advances in optical technologies have dramatically increased the impact that PLIs have on the optical signal quality, particularly in the context of SWS networks. Then, in Part II of the thesis, we present a set of case studies where it is shown that the application of operations research (OR) methodologies in the desing/planning stage of future cross-layer Internet network architectures leads to the successful joint optimization of key network performance indicators (KPIs) such as cost (i.e., CAPEX/OPEX), resources usage and energy consumption. OR can definitely play an important role by allowing network designers/architects to obtain good near-optimal solutions to real-sized problems within practical running times.

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Section: Thesis Contributions and Structurementioning

confidence: 99%