Generalized sharing in survivable optical networks
IEEE/ACM Transactions on Networking (TON)
A hybrid method for solving ARWA problem on WDM network
Computer Communications
A novel recursive shared segment protection algorithm in survivable WDM networks
Journal of Network and Computer Applications
IEEE Transactions on Parallel and Distributed Systems
Efficient path protection in bi-directional WDM systems
Computer Networks: The International Journal of Computer and Telecommunications Networking
Traffic recovery time constrained shared sub-path protection algorithm in survivable WDM networks
Computer Networks: The International Journal of Computer and Telecommunications Networking
A survey of survivability in multi-domain optical networks
Computer Communications
Near optimal routing and capacity management for PWCE-based survivable WDM networks
Photonic Network Communications
Link repair in managed multi-domain connections with end-to-end quality guarantees
International Journal of Network Management
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This paper investigates survivable lightpath provisioning and fast protection switching for generic mesh-based optical networks employing wavelength-division multiplexing (WDM). We propose subpath protection, which is a generalization of shared-path protection. The main ideas of subpath protection are: 1) to partition a large optical network into smaller domains and 2) to apply shared-path protection to the optical network such that an intradomain lightpath does not use resources of other domains and the primary/backup paths of an interdomain lightpath exit a domain (and enter another domain) through a common domain-border node. We mathematically formulate the routing and wavelength-assignment (RWA) problem under subpath protection for a given set of lightpath requests, prove that the problem is NP-complete, and develop a heuristic to find efficient solutions. Comparisons between subpath protection and shared-path protection on a nationwide network with dozens of wavelengths per fiber show that, for a modest sacrifice in resource utilization, subpath protection achieves improved survivability, much higher scalability, and significantly reduced fault-recovery time.