Defragmentation Using Reroutable Backup Paths in Toggled 1+1 Path Protected Elastic Optical Networks

Sawa, Takaaki; He, Fujun; Sato, Tomomasa; Chatterjee, Bijoy Chand; Oki, Eiji

doi:10.1109/apcc.2018.8633461

Cited by 8 publications

(1 citation statement)

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“…Te light paths can switch the primary or backup paths; both can be rearranged through defragmentation. Te success of the switch path approach in [7] and Sawa et al [8] enhance the approach that enables the backup path to be rerouted in the supposedly 1 + 1 path protected in the EON. Pederzolli et al [9] proposed a new fragmentation metric.…”

Section: Related Workmentioning

confidence: 99%

The Effectual Spectrum Defragmentation Algorithm with Holding Time Sensitivity in Elastic Optical Network (EON)

Kumar

Kamalakannan

et al. 2022

International Journal of Optics

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The elastic optical network (EON) fulfills the upcoming generation network requirements such as high-definition videos, high bandwidth demand services, and ultra-high-definition televisions. The key issues in EON are routing spectrum assignment and spectrum fragmentation for spectrum allocation. The spectrum fragmentation issues are resultant in poor consumption of spectrum resources and an increase in the new connection blocking. A flexible defragmentation algorithm must utilize more spectrum resources with a high transmission rate. This paper presents a new multiconstrained defragmentation algorithm (MCDFA) for elastic optical networks. The MCDFA addressed two key issues: spectrum allocation for new connections and then reconfiguring the existing connections in a nondisruptive manner. The first-last-exact fit spectrum allocation policy assigns the spectrum slots during the new connection request. It splits each light path request by disjoint/ nondisjoint and by efficiently handling the small fragmented slots in spectrum resources. The simulation results are evaluated using standard metrics such as bandwidth blocking probability, bandwidth fragmentation ratio, and spectrum utilization gain. The results also demonstrated that our proposed algorithm generates promised solution to EON’s routing, spectrum assessment, and fragmentation issues.

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Section: Related Workmentioning

confidence: 99%