Path Routing in Mesh Optical Networks

Path Routing in Mesh Optical Networks

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Transport networks evolved from DCS (Digital Cross-connect Systems)-based mesh architectures, to SONET/SDH (Synchronous Optical Networking/Synchronous Digital Hierarchy) ring architectures in the 1990's. In the past few years, technological advancements in optical transport switches have allowed service providers to support the same fast recovery in mesh networks previously available in ring networks while achieving better capacity efficiency and resulting in lower capital cost.Optical transport networks today not only provide trunking capacity to higher-layer networks, such as inter-router co...