CygNet Optical Transport Network Management System (OTNMS) is a novel all-in-one NMS (Network Management System) and OSS (Operations Support System) which does the complete end-to-end provisioning and management of optical transport networks. It performs service and circuit provisioning, circuit activation, root cause and service impact analysis as well as OAM (Operations, Administration, and Maintenance) for standards-based and legacy optical transport network. It is a standards-based solution that integrates network elements spanning multiple transport technologies from multiple vendors into a single platform. It provides comprehensive management of all aspects of a transport network and the functionality covers a substantial part of the Service Assurance as well as Service Fulfillment aspects for transport networks. CygNet OTNMS provides the auto-discovery feature, as well as automatic synchronization of the inventory database with the current network configuration.

Path Computation Algorithms for Dynamic Service Provisioning

Another novel feature of this work is the development of new path computation algorithms for dynamic service provisioning in transport networks. The special feature of these algorithms is that they take into account the constraints specific to different transport technologies. For example in SDH networks, these algorithms take into account the multiplexing structure defined by SDH which imposes restrictions on the allocation of bandwidth and the fact that higher order trails (logical connections) have to be established to support any bandwidth requirement. Also these algorithms support standard protection mechanisms like Multiplex Section Protection (MSP), Multiplex Section - Shared Protection Ring (MS-SPRing) and Subnetwork Connection Protection (SNCP) defined in SDH. The algorithms are developed for both dedicated and shared protection. Also, they support various inverse multiplexing techniques where a data stream that is too large for a single transmission path is broken into smaller pieces, and the pieces are transmitted over separate transmission paths to the receiving end. Finally, the algorithms take into account the Shared Risk Link Group (SRLG) constraints where the aim is to increase capacity efficiency by allowing sharing of protection channels between primary working paths that do not have any single-failure modalities in common.

Network Diagrams

70 Node Network (Network 1)
VSNL Network (Network 3)