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Design and dimensioning of hybrid PONs

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Abstract

We investigate the greenfield deployment of hybrid time division multiplexing/wavelength division multiplexing passive optical networks, i.e., the optimized covering of a given geographical area by a set of cost-effective and properly dimensioned hybrid PONs. We first propose a three-phase optimization scheme. In the first phase, a p-center model is proposed to determine the best ONU clusterings and the lower-level passive distribution node equipment locations. The second phase takes care of the placement of the upper-level passive distribution node equipment and the third one, using the traffic demands, a mix of unicast and multicast requests, selects the most appropriate passive distribution node equipment, i.e., either an arrayed waveguide gratings or a splitter. We next merge the first two phases, leading then to a two-phase scheme. Computational experiments are conducted on two sets of ONUs, one with 128 and one with 512 ONUs. We compare the two- and three-phase schemes in terms of PON design costs. We observe that the two-phase scheme provides more cost-effective solutions. We also provide a sensitivity analysis with respect to several parameters in order to identify the number of ONU clusters that minimizes the deployment cost.

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Notes

  1. Such a value may be considered as rather optimistic in practice, e.g., in order to include splice losses, aging, and connector losses. Indeed, we recently learned that operators usually calculate it with 0.35 dB/km.

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Acknowledgments

B. Jaumard was supported by a Concordia University Research Chair (Tier I) and by an NSERC (Natural Sciences and Engineering Research Council of Canada) grant.

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Correspondence to Brigitte Jaumard.

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Jaumard, B., Song, S. & Chowdhury, R. Design and dimensioning of hybrid PONs. Photon Netw Commun 31, 466–482 (2016). https://doi.org/10.1007/s11107-015-0591-2

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