Impact of fiber type and Raman pumping in NyWDM flexible-grid elastic optical networks

Ahmad, Arsalan; Bianco, Andrea; Chouman, Hussein; Marchetto, Guido; Tahir, Sarosh; Curri, Vittorio

doi:10.1109/icton.2016.7550387

Cited by 4 publications

(6 citation statements)

References 10 publications

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“…We assume transponders are able to tune the delivered bit-per-symbol (BpS) switching modulation formats as shown in Table 3. In particular, we assume to use polarization-division multiplexed (PM) multilevel modulation formats in the following set of square constellations with coherent receivers: Binary Phase-Shift Keying (PM-BPSK), Quadrature Phase-Shift Keying (PM-QPSK), 16 Quadrature Amplitude Modulation (PM-16QAM) and 64-Quadrature Amplitude Modulation (PM-64QAM). Hence, the net bit-rate R b per lightpath may vary from 20 to 600 Gbps.…”

Section: Transmission Layer Modelmentioning

confidence: 99%

“…In a previous contribution [16] only one performance metric was considered for simplicity: the spectral occupancy (SO) defined as the total number of used spectral slots divided by the total number of available slots. Obviously, a decrease in SO reflects a better efficiency in spectrum utilization.…”

Section: Network Simulation Scenariosmentioning

confidence: 99%

“…Obviously, a decrease in SO reflects a better efficiency in spectrum utilization. Differently from [16], here we analysed the performance against the matrices like power consumption, number of blocked requests and spectral efficiency. We use the following expression for the spectral efficiency SE:…”

Section: Network Simulation Scenariosmentioning

confidence: 99%

“…In [15], we showed the advantages of using HFAs in fixed-grid networks. We extend such analysis to the flexible-grid scenario in [16] to show how HFA in moderate pumping regime reduces the spectral occupancy. In this work we perform a sensitivity study by changing i) physical layer characteristics like fiber type, Raman pumping level (RPL) and span length, and ii) network parameters such as average traffic per node (R b,N ).…”

Section: Introductionmentioning

confidence: 99%

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Raman Pumping as an Energy Efficient Solution for NyWDM Flexible-grid Elastic Optical Networks

Ahmad¹,

Bianco²,

Curri³

et al. 2017

IJECE

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This paper investigates transparent wavelength routed optical networks using three different fiber types NZDSF, SMF and PSCF -and validates the effectiveness of Hybrid Raman/EDFA Fiber Amplification (HFA) with different pumping levels, up to the moderate 60% pumping regime. Nodes operate on the basis of flexible-grid elastic NyWDM transponders able to adapt the modulation format to the quality-of-transmission of the available lightpath, exploiting up to five 12.5 GHz spectral slots. Results consider a 37-node Pan-European network for variable Raman pumping level, span length and average traffic per node. We show that HFA in moderate pumping regime reduces the power consumption and enhances spectral efficiency for all three fiber types with particular evidence in NZDSF. In essence to that, introduction of HFA is also beneficial to avoid blocking for higher traffic loads.

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Section: Transmission Layer Modelmentioning

confidence: 99%

Section: Network Simulation Scenariosmentioning

confidence: 99%

Section: Network Simulation Scenariosmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Raman Pumping as an Energy Efficient Solution for NyWDM Flexible-grid Elastic Optical Networks

Ahmad¹,

Bianco²,

Curri³

et al. 2017

IJECE

Self Cite

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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%

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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Smart Provisioning of Sliceable Bandwidth Variable Transponders in Elastic Optical Networks

Masood

Khan

Ahmad

et al. 2020

2020 6th IEEE Conference on Network Softwarization (NetSoft)

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Impact of fiber type and Raman pumping in NyWDM flexible-grid elastic optical networks

Cited by 4 publications

References 10 publications

Raman Pumping as an Energy Efficient Solution for NyWDM Flexible-grid Elastic Optical Networks

Raman Pumping as an Energy Efficient Solution for NyWDM Flexible-grid Elastic Optical Networks

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

Smart Provisioning of Sliceable Bandwidth Variable Transponders in Elastic Optical Networks

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