Assessment of novel regenerator assignment strategies in dynamic translucent elastic optical networks

Silva, Emerson F. da; Almeida, Raul C.; Pereira, Helder A.; Chaves, Daniel A. R.

doi:10.1007/s11107-019-00873-9

Cited by 8 publications

(4 citation statements)

References 36 publications

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“…For regeneration placement, the NDF method was applied. Finally, in Reference [25], the problem of regenerator assignment in dynamic translucent optical networks was examined. It was assumed that each lightpath could be divided into several transparent segments, connected by 3R regenerators capable of accomplishing modulation format and spectrum conversion.…”

Section: Related Workmentioning

confidence: 99%

“…The motivation behind full flexibility is to use more efficient modulation formats for shorter transparent path segments with the possibility to apply different modulation formats on different segments, i.e., modulation conversion and spectrum conversion is In our previous papers, we examined three B2B regeneration scenarios: minimal regeneration, regeneration without modulation conversion, and flexible regeneration allowing for modulation conversion. Since, according to the results presented in References [11,25,28], the flexible approach provides the best results in terms of blocking probability, in this paper we focused only on this scenario. In the flexible B2B regeneration, a full flexibility of the B2B regeneration was assumed [29].…”

Section: Network Modelmentioning

confidence: 99%

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Predeployment of Transponders for Dynamic Lightpath Provisioning in Translucent Spectrally–Spatially Flexible Optical Networks

et al. 2020

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We consider a dynamic lightpath provisioning problem in translucent spectrally–spatially flexible optical networks (SS-FONs) in which flexible signal regeneration is achieved with transponders operating in back-to-back (B2B) configurations. In the analyzed scenario, an important aspect that has a significant impact on the network performance is the decision on placement of transponders that can be used for two purposes: transmitting/receiving (add/drop) of optical signals at the source/destination nodes and regeneration of the signals at some intermediate nodes. We propose a new algorithm called scaled average used regenerators (SAUR). The key idea of the SAUR method is based on a data analytics approach, i.e., the algorithm exploits information on network traffic characteristics and the applied dynamic routing algorithm to obtain additional knowledge for the decision on transponder placement. The numerical results obtained for two representative topologies highlight that the proposed SAUR method outperforms reference algorithms in terms of the amount of traffic that can be accepted in the network. In other words, placement of transponders yielded by the SAUR method allows to increase the SS-FON throughput using only the existing resources, i.e., the network operator does not have to invest in new devices or fibers.

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Section: Related Workmentioning

confidence: 99%

Section: Network Modelmentioning

confidence: 99%

Predeployment of Transponders for Dynamic Lightpath Provisioning in Translucent Spectrally–Spatially Flexible Optical Networks

et al. 2020

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“…• 3R regenerators/HFA placement or assignment techniques for improving network performance or minimizing network cost [18], [19], [20], [21], [22], [23], • impact evaluation of different amplification schemes or 3R regeneration on the network performance, assuming a given placement technique [9], [24], [25], [26], [27].…”

Section: Introductionmentioning

confidence: 99%

“…In EON scenarios, various algorithms have been proposed to solve the regenerator placement problem aiming to reduce power consumption [18] or reducing blocking probability [21]. Additionally, a solution for the regenerator assignment problem in dynamic EONs was proposed in [23], aiming to minimize the number of 3R regenerators and frequency slots used.…”

Section: Introductionmentioning

confidence: 99%

Impact of Amplification and Regeneration Schemes on the Blocking Performance and Energy Consumption of Wide-Area Elastic Optical Networks

et al. 2021

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This paper studies the physical layer's impact on the blocking probability and energy consumption of wide-area dynamic elastic optical networks (EONs). For this purpose, we consider five network configurations, each named with a network configuration identifier (NCI) from 1 to 5, for which the Routing, Modulation Level, and Spectrum Assignment (RMLSA) problem is solved. NCI 1-4 are transparent configurations based on all-EDFA, hybrid Raman/EDFA amplifiers (with different Raman gain ratio Γ R ), all-DFRA, and alternating span configuration (EDFA and DFRA). NCI 5 is a translucent configuration based on all-EDFA and 3R regenerators. We model the physical layer for every network configuration to determine the maximum achievable reach of optical signals. Employing simulation, we calculate the blocking probability and the energy consumption of the different network configurations. In terms of blocking, our results show that NCI 2 and 3 offer the lowest blocking probability, with at least 1 and 3 orders of magnitude of difference concerning NCI 1 and 5 at high and low traffic loads, respectively. In terms of energy consumption, the best performing alternatives are the ones with the worst blocking (NCI 1), while NCI 3 exhibits the highest energy consumption with NCI 2 Γ R = 0.75 following closely. This situation highlights a clear trade-off between blocking performance and energy cost that must be considered when designing a dynamic EON. Thus, we identify NCI 2 using Γ R = 0.25 as a promising alternative to reduce the blocking probability significantly in wide-area dynamic EONs without a prohibitive increase in energy consumption.INDEX TERMS Elastic optical networks, resource assignment, translucent configuration, transparent configuration.

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Optical Networks and Interconnects

Machuca

Wosinska

Ruffini

et al. 2023

Handbook of Radio and Optical Networks Convergence

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Assessment of novel regenerator assignment strategies in dynamic translucent elastic optical networks

Cited by 8 publications

References 36 publications

Predeployment of Transponders for Dynamic Lightpath Provisioning in Translucent Spectrally–Spatially Flexible Optical Networks

Predeployment of Transponders for Dynamic Lightpath Provisioning in Translucent Spectrally–Spatially Flexible Optical Networks

Impact of Amplification and Regeneration Schemes on the Blocking Performance and Energy Consumption of Wide-Area Elastic Optical Networks

Optical Networks and Interconnects

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