Content distribution in Elastic Optical Networks with Dedicated Path Protection

Recently, the Content Oriented Networking (CON) has become a recognized approach that is gaining extensive acceptance and deployment. At the same time, Elastic Optical Networks (EONs) are considered as a very promising approach for effective bandwidth allocation in optical networks. In this paper, we consider various approaches to content distribution in EON protected by the Dedicated Path Protection (DPP) scheme. We evaluate impact of these approaches on the performance of survivable EON with respect to CAPEX cost, power consumption and spectrum usage. We run numerical experiments on two representative network topologies with traffic patterns based on the Cisco predictions. The results show that the additional overhead of using the DPP protection in the EON for the analyzed performance metrics is from 2.1 to 3.5, depending on the metric and considered content delivery scenario. Moreover, the obtained results prove that the content delivery scenario has a large impact on the performance of the EON used in the physical layer and its suitable choice can bring up to 50% savings in all considered metrics.