Abstract
Telecommunication networks are becoming the central linking institution of the Fourth Industrial Revolution. To cope with the associated capacity and connectivity challenges, transportation networks may explore the -neglected so far- remaining transmission bands in the second and third low attenuation windows of the optical fibre overcoming the C-band barrier. To assess the potential of optical multi-band transmission systems to upgrade a European Operator's network, we have developed a planning tool based on a routing engine that exploits a novel Physical Layer Aware, Routing, Modulation and Spectral Assignment algorithm. We considered unrepeatered transmission exploiting fibre amplifiers tailored to each transmission band. Taking into account the performance of close to commercialization fibre amplifier devices, we estimated the impact for the most detrimental effects in multi-band transmission like ASE accumulation, FWM and SRS. With the aid of this planning tool, we demonstrate the potential of multi-band systems to upgrade network capacity without compromising the connectivity between Core nodes, albeit new physical layer challenges. Nevertheless, it is shown that multi-band systems allow higher operational flexibility that may slow-down the need to deploy additional C-band fibres. Moreover, we have shown that the roll out of these multi-band systems could be planned in phases in order to limit first-day capital expenditure.
Highlights
The proliferation of Fourth Industrial Revolution applications associated with Internet of Things and other Machine-to-Machine communication systems and the advances in fixed and wireless access technologies to support them, will put, in turn, optical transport networks under a significant strain
We have shown that the roll out of these multi-band systems could be planned in phases in order to limit first-day capital expenditure
For a system design and modeling that it is self-consistent across all optical bands, we have introduced a number of approximations as follows: a) For the bands of Table 2, the amplifier gain exactly compensates the total losses of the preceding single mode fibre (SMF) span
Summary
The proliferation of Fourth Industrial Revolution applications associated with Internet of Things and other Machine-to-Machine communication systems and the advances in fixed and wireless access technologies to support them, will put, in turn, optical transport networks under a significant strain. The emergence of “Elastic” Optical Networks (EONs) proved to be a landmark in the quest to maximise the utilisation of the available spectrum in the C-band and paved the way to achieve transportation rates beyond 100G, towards single wavelength 1 Tb/s line-rates. These advances are accompanied by a number of pitfalls. Under the second alternative, (b), despite the remarkable advances in the attainable quality of transmission (QoT) performance -thanks to progress in digital signal processing (DSP)higher single channel rates are achieved at the expense of lower reach This becomes increasingly difficult with the emergence of dramatically more dynamic traffic patterns [1]
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