Fault Management with Fast Restoration for Optical Burst Switched Networks
BROADNETS '04 Proceedings of the First International Conference on Broadband Networks
1+X: A Novel Protection Scheme for Optical Burst Switched Networks
Information Networking. Towards Ubiquitous Networking and Services
BFD-based failure detection and localization in IP over OBS/WDM multilayer network
International Journal of Communication Systems
Realization strategies of dedicated path protection: A bandwidth cost perspective
Computer Networks: The International Journal of Computer and Telecommunications Networking
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High-capacity optical backbone networks protect their premium customers' information flows by routing two copies of the customer's data over disjoint paths. This scheme, known as 1+1 protection, provides extremely rapid recovery from network failures. We propose an architecture by which 1+1 protection can be extended to optical burst switched (OBS) networks. This architecture is designed by modifying the diversity routing architecture that was originally proposed for nonoptical packet networks and recently applied to networks employing the generalized multiprotocol label switched (GMPLS) architecture. We extend the architecture developed for just-in-time OBS signaling to support 1+1 protection. We also examine design issues that are raised by a difference in the propagation delays of the two disjoint paths across the OBS network. We show that a sufficiently large difference in the propagation delays can cause performance degradations that may result in an unsatisfactory quality-of-service on the protected connection. We examine the impact of this delay mismatch on restoration performance, probability of burst loss, and jitter. Through analysis and simulations, it is discussed how these negative effects can be eliminated.