Ridwansyah, Syafruddin Syarif, Dewiani, Wardi
A single instance of a router outage in IP over elastic optical networks affects multiple traffic. This traffic can be recovered using the spare capacities of unaffected flows. When the spare capacities do not suffice for grooming affected traffic, spectrum expansion is possible as long as there is no interference from the neighboring spectrum. However, a new lightpath must be prepared if that is the case. Such a condition leads to increased operator’s operating expense (OPEX). To deal with this issue, we propose an algorithm that combines the spectrum expansion technique with reactive hitless defragmentation, where spectrum defragmentation is carried out to obtain a sufficient number of free frequency slots, allowing the processing of spectrum expansion. Based on the results of simulations, our proposed algorithm, in comparison to the benchmark algorithm, can successfully minimize the number of new lightpaths, which includes reducing the number of lightpath reconfigurations and minimizing additional power consumption to decrease the total cost of additional OPEX. © 2023 Wydawnictwo SIGMA-NOT. All rights reserved.
Electrical Engineering Department, Universitas Hasanuddin, Indonesia; Electronic Engineering Study Program, Universitas Negeri Makassar, Indonesia
