Enhancing survivability for elastic optical inter-DataCenter networks ; Prédiction des catastrophes naturelles et survivabilité contre les pannes liés aux catastrophes dans les réseaux de centre de données optiques
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Enhancing survivability for elastic optical inter-DataCenter networks ; Prédiction des catastrophes naturelles et survivabilité contre les pannes liés aux catastrophes dans les réseaux de centre de données optiques
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Non communiqué ; With the widespread popularity of applications such as cloud computing, ultra-high-definition video-on-demand, streaming, etc., the exponential growth of the generated information presents a challenge for the current optical networks, especially for Inter-DataCenter (DC) networks, which carry massive amounts of DC-to-client information. The traditional wavelength division multiplexing (WDM) optical network is not adapted to future networks due to its "one-size-fits-all" data transmission mode. Meanwhile, elastic optical networks (EONs) have shown the flexibility and scalability to solve the problem of huge traffic provisioning. It is widely regarded as the next-generation optical network architecture and inter-DC network, which is the so-called Elastic Optical Inter-DataCenter Network (EO-DCN). However, the multitudes of Internet services are facing critical threats from network failures, e.g. fiber cut, and natural disruption. These network failures will cause incalculable financial losses. Thus, network resilience is one of the most significant factors for a majority of DC-based services. In this dissertation, we develop two classic protection schemes in EO-DCNs, i.e. directed pre-configured cycles (p-cycle) protection and dedicated path protection, against single link failure and disaster failure, respectively, to further enhance the survivability of EO-DCNs. We first propose to investigate how to schedule the directed p-cycle protection for lower power consumption based on a compact modulation format selection in EO-DCNs. Instead of a brief upper bound on the modulation format assignment in the conventional directed p-cycle design, the proposed modulation format adaptation is designed as just enough for the directed p-cycle, which is determined by the distance of each on-cycle protection path. The problem involves the directed p-cycle generation, modulation format adaptation, power consumption minimization, and spectrum allocation. To this end, three different integer linear programs (ILPs) ...