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The emergence of multilayer networking capabilities opens the path for the deployment of advanced network architectures and resilience concepts. In this article we propose a novel resource-efficient homing scheme we call dual homing with shared backup router resources (SBRR). As the scheme realizes shared routerlevel redundancy with the help of dynamic circuit-switched services, it can achieve significantly...
Alternative homing architectures can lead to significant cost reductions. These reductions are quantified using linear programming under a multi-layer consideration. In this paper we focus on the CAPEX savings achieved by transitioning to different homing architectures in an IP-over-OTN setting. The impact of traffic demand is examined for different reference networks. Additionally, it is shown that...
To meet high availability requirements in a cost efficient manner necessitates the development of advanced techniques to optimize the interaction between network layers. As network architectures heavily influence network planning, we conduct our multi-layer studies under the prism of homing architectures. Alternative homing architectures to traditional dual homing are studied, focusing on the incurring...
Energy efficiency and the minimization of capital expenditures (CAPEX) for network equipment are studied for two network architectures: IP over WDM and IP over OTN over WDM. Case study results from mixed integer linear programming (MILP) formulations indicate that a CAPEX optimized network yields solutions having minimum energy consumption for both architectures. However, it is shown that the most...
A generic multi-layer model and a linear programming (LP) formulation are developed enabling the calculation of the optimal solution in terms of network equipment capital expenditures (CAPEX) in multi-homing design. Alternative homing architectures to traditional dual homing are studied not only with respect to network equipment costs but also regarding the achieved availability gain. Case study results...
In this paper alternative homing architectures to traditional dual homing, where homing is defined as the interconnection of an access router to a core router, are studied and classified according their inherit characteristics. A set of qualifiers is proposed identifying the distinct features of homing architectures on multiple network layers. Special attention is given to availability analysis. Building...
This paper considers the functionality and standards required to enable carrier-grade core networks based on Ethernet-over-WDM. Possible Ethernet backbone network architectures will be discussed followed by an evaluation of the CAPEX and OPEX performance.
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