Abstract
A functional block-based disaggregation approach that handles optical component devices as a management unit is essential for supporting various optical node structures suitable for diverse network applications in the future. Furthermore, precise path computation considering detailed intra-node structures is enabled by the functional block-based disaggregation approach, which is important not only for online use cases, such as optical path establishment/removal operations, but also for offline use cases, such as node functionality analysis or generation of node-setting tables. This study developed an optical path computation prototype, based on an open-source solution, that employs a functional block-based disaggregation approach and supports a computationally intensive flexible grid mechanism. To realize universal path computation that is applicable to any node structure without algorithm modification, integer linear programming was employed as a generic computational method. The computation time of the developed prototype was evaluated over multiple node structures, providing different functionalities and node scales. Approaches for reducing the computation time were also investigated. The developed path computation system achieved reasonable computation times for the offline use cases and online use cases with limited scales.
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