Design of Low-Margin Optical Networks
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181 citations
Cites background from "Design of Low-Margin Optical Networ..."
...because it can postpone costly deployment of new fibers by efficiently utilizing the existing optical fiber infrastructures [7], [14]....
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163 citations
Cites background from "Design of Low-Margin Optical Networ..."
...The randomization of the latter parameter accounts for the unpredictability of fast time-varying penalties (such as polarization effects [3])....
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..., simplified power budget with nonlinear-impairment estimations based on a Gaussian model [2]) introduce higher link margins in the calculation of the lightpath budget to compensate for model inaccuracies, thus leading to an underutilization of network resources [3]....
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100 citations
Cites background from "Design of Low-Margin Optical Networ..."
...Finally, as stated in [6], failure localization or quality of transmission estimators [16] based on monitoring information typically require link-level characteristics while coherent receivers provide end-to-end information....
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...Monitoring is attracting increasing interest for several reasons such as: i) the reduction of system margins (which derives in reducing capital expenditures) might induce more frequent degradations at the optical layer [6], [7]; ii) a more accurate estimation of the quality of transmission and an optimization of transmission parameters, routing, and spectrum assignment [8]....
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99 citations
85 citations
Cites background from "Design of Low-Margin Optical Networ..."
...Many other techniques also exist in the literature [5][6]....
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...Input Power {Pactual} N(p , p) p = 0 dBm p = 1 dBm {Pe} N(p , p) p = [-2,-1,0,1,2] dBm p = 1 dBm Noise Figure {NFactual} U[5, 7] dB {NFe} 5, 6 or 7 dB V....
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...To ensure that all traffic demands in an optical network fulfill their target capacities, network designers add significant (up to several dBs) pre-defined “design margins” to the values predicted by the QoT model or tool [5][6]....
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References
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"Design of Low-Margin Optical Networ..." refers background in this paper
...Assuming that the deployed optical TRX is rateflexible and 200 Gb/s-capable: when the demand grows, for instance to 200 Gb/s, the U-margin is leveraged and the extra capacity can be allocated without replacing the optical TRX, by simply changing its modulation format from PDM-QPSK to PDM-16QAM (Fig....
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