Experimental Evaluation of the Link Cost Impact in OSNR-Based IRWA Algorithms for GMPLS-Enabled Translucent WSON

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Executive Summary

This paper addresses the dynamic provisioning of optical connections within a GMPLS-enabled translucent wavelength switched optical network with sparse 3R regenerators. To this end, an OSNR-based IRWA algorithm computes routes that aim at satisfying both restrictions: the wavelength continuity constraint and adequate end-to-end optical signal quality. If either constraint cannot be satisfied, the sparse 3R regenerators placed throughout the network may be employed. Given the fact that 3R regenerators are considered a cost-expensive network resource, the IRWA algorithm is devised to optimize/minimize the utilization of available 3R regenerators when computing paths. This is accomplished through a cost-model function in which two metrics are defined, namely, the network link cost and the node regenerator cost.

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