Numerical evaluation of communication networks resilience with a focus on power supply performance during natural disasters

This paper presents a quantitative framework for measuring and characterizing resilience of information and communications technology facilities with a focus on their power supply. Although the focus of the presented framework is for communication networks power supply, it is also applicable to power grids in general. The proposed framework uses a measure analogous to availability in order to measure resilience of communication systems power supply. A dynamic notion of dependency is discussed and a mathematical quantifiable relationship showing how dependencies affect resilience is explained. The importance of energy storage as a regulator for dependencies is also explored and additional related definitions and metrics are provided. This discussion is presented in practical context by using actual data and photographic records from recent natural disasters.

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