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Communication networks have to provide a high level of resilience in order to ensure sufficient Quality of Service for mission-critical services. Currently, dedicated 1+1 path protection is implemented in backbone networks to provide the necessary resilience. On the other hand, there are several possible realization strategies for 1+1 path protection functionality (1PPF), utilizing both diversity- and network coding. In this paper, the authors consider the cost aspects of the different realization strategies. They evaluate the cost of providing 1PPF both analytically and empirically in realistic network topologies.
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