Abstract
Reliability is a crucial concern in high-speed optical networks. A service-level agreement (SLA), which mandates high service availability even in face of network failures, must be met in provisioning reliable connection. In this study, we investigate a generalized connection-provisioning and protection model to provide availability-guaranteed services in a wavelength-division multiplexing (WDM) optical mesh network. A novel link-state model is proposed to represent physical-layer availability and resource status for an optical link. This information can be used by a standard link-state routing protocol to efficiently provide reliable connections. In our proposed link-state-modeling mechanism, current network resource information and the physical components’ failure characteristics are aggregated to form a comprehensive dynamic link-state parameter, called link and resource availability (LRA). Based on such a dynamic link-state parameter, we also propose an algorithm for availability-guaranteed connection provisioning. A new generalized protection model is developed through our dynamic LRA-based provisioning. The dynamic LRA-based connection-provisioning algorithm efficiently provides SLA-guaranteed services while significantly improving connection reliability, better utilizing network resources, and achieving fast failure recovery.
This work has been supported by the US National Science Foundation (NSF) under Grant No. ANI-99-86665.
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Huang, Y.(., Wen, W., Heritage, J.P., Mukherjee, B. (2003). A New Protection Model to Provide Availability-Guaranteed Service for Reliable Optical WDM Networks. In: Das, S.R., Das, S.K. (eds) Distributed Computing - IWDC 2003. IWDC 2003. Lecture Notes in Computer Science, vol 2918. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-24604-6_36
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DOI: https://doi.org/10.1007/978-3-540-24604-6_36
Publisher Name: Springer, Berlin, Heidelberg
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