IEEE/ACM Transactions on Networking (TON)
Optimal capacity placement for path restoration in STM or ATM mesh-survivable networks
IEEE/ACM Transactions on Networking (TON)
Reconfiguration for service and self-healing in ATM networks based on virtual paths
Computer Networks and ISDN Systems
Restoration strategies and spare capacity requirements in self-healing ATM networks
IEEE/ACM Transactions on Networking (TON)
IEEE/ACM Transactions on Networking (TON)
Approaches for capacity and revenue optimization in suvivable WDM networks
Journal of High Speed Networks - Survivable optical networks - part I
Multiwavelength Optical Networks: A Layered Approach
Multiwavelength Optical Networks: A Layered Approach
INFOCOM '97 Proceedings of the INFOCOM '97. Sixteenth Annual Joint Conference of the IEEE Computer and Communications Societies. Driving the Information Revolution
Fast network re-optimization schemes for MPLS and optical networks
Computer Networks: The International Journal of Computer and Telecommunications Networking
Scheduling bulk file transfers with start and end times
Computer Networks: The International Journal of Computer and Telecommunications Networking
Dynamic scheduling of network resources with advance reservations in optical grids
International Journal of Network Management
IEEE/ACM Transactions on Networking (TON)
Fast network re-optimization schemes for MPLS and optical networks
Computer Networks: The International Journal of Computer and Telecommunications Networking
An efficient virtual topology design and traffic engineering scheme for IP/WDM networks
ONDM'07 Proceedings of the 11th international IFIP TC6 conference on Optical network design and modeling
Algorithms and models for backup reprovisioning in WDM networks
IEEE/ACM Transactions on Networking (TON)
A study of the backup reprovisioning problem for FIPP p-cycles on WDM networks
Photonic Network Communications
Exploiting excess capacity to improve robustness of WDM mesh networks
IEEE/ACM Transactions on Networking (TON)
On the complexity of the edge-disjoint min-min problem in planar digraphs
Theoretical Computer Science
Combining explicit admission control and congestion control for predictable data transfers in grids
Future Generation Computer Systems
Disaster survivability in optical communication networks
Computer Communications
An efficient scheme for two-link failure protection/restoration in WDM mesh networks
Journal of High Speed Networks
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Intelligent mesh optical networks deployed today offer unparalleled capacity, flexibility, availability, and, inevitably, new challenges to master all these qualities in the most efficient and practical manner. More specifically, demands are routed according to the state of the network available at the moment. As the network and the traffic evolve, the lightpaths of the existing demands becomes sub-optimal. In this paper we study two algorithms to re-optimize lightpaths in resilient mesh optical networks. One is a complete re-optimization algorithm that re-routes both primary and backup paths, and the second is a partial re-optimization algorithm that re-routes the backup paths only. We show that on average, these algorithms allow bandwidth savings of 3% to 5% of the total capacity in scenarios where the backup path only is re-routed, and substantially larger bandwidth savings when both the working and backup paths are re-routed. We also prove that trying all possible demand permutations with an online algorithm does not guarantee optimality, and in certain cases does not achieve it, while for the same scenario optimality is achieved through re-optimization. This observation motivates the needs for a re-optimization approach that does not just simply look at different sequences, and we propose and experiment with such an approach. Re-optimization has actually been performed in a nationwide live optical mesh network and the resulting savings are reported in this paper, validating reality and the usefulness of re-optimization in real networks.