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The relations of different layers in WDM network are analyzed according to the need for the development of multi-layer networks for services application when failure takes place. In addition, two survivability methods for multi-layer networks and the corresponding implementation methods are proposed.
To recover link failure on resilient packet ring (RPR) networks, two protection mechanisms, steering and wrapping, defined in IEEE 802.17 can restore a failed network in less than 50 ms, and maintain link connectivity between each node. In this study, we focus on the RPR steering mechanism and the properties of the three different traffic classes defined in RPR by conducting simulation. We find that...
Dual-failures are considered as the main contributors to service unavailability in p-cycle based mesh networks that are designed to withstand single failures. Methods such as post-failure reconfiguration and prefailure provisioning of additional protection capacity have been considered to add another level of protection against dual-failures. In this paper, we present availability-aware service provisioning...
Four key economic and operational benefits from mesh optical networking are discussed. They are (1) end-to-end routing and provisioning, (2) fast and capacity-efficient restoration, (3) re-provisioning, and (4) re-optimization. They contribute in various ways to network cost savings and higher network and service reliability in mesh networks compared to traditional ring-based networks.
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