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For the study of the L-band hardware cost, to be 330€. So, the total cost of the network
we consider the normalized cost of each using N1 FD&W ChD with amplified and
hardware component to be two times the cost unamplified is 2134k€ and 2128.3k€,
of C-band components. At the bottom of respectively, when the components are twice
Table 1, the cost and power consumption per expensive, which means that the unamplified
n o d e a n d a l s o t h e c o s t a n d p o w e r solution is 3% less costly than the amplified
consumption for the entire network, one.
considering nine tributary amplified or
unamplified nodes combined with two hub CONCLUSIONS
nodes in the L-band, are shown. We concluded that the total cost of the
The tributary node unamplified solution is horseshoe network considering amplified
cheaper and consumes less power per node and unamplified solutions is 2134 ke, and
(around 20 W) than the tributary node 2128.3 ke, respectively (40% higher than in
amplified solution. The transponders are the the C-band). The total power consumption
components that most contribute around per horseshoe network is around 68.75 kW,
99% to the final cost of the node. The power higher than in the C-band.
consumption of the node tributary is about Filipa Gomes
3.4 kW, which is around 1.7 times higher than
NOS Alfa Tech trainee
the consumption of the FD&W ChD for the C- Fiber centric | Planeamento
band. The normalized cost per tributary node e Gestão @NOS SGPS
is around 281, 3.5 times higher than in the C- Perfil | Profile
band. The hub node for the L-band is more
expensive than the C-band, with a normalized Source 1: R. Emmerich, A. Eira, N. Costa, P. W. Berenguer,
C. Schubert, J. K. Fischer, and J. Pedro, "Capacity
cost of around 3.5 times of the same node in limits of C+L metro transport networks exploiting
the C-band. The total normalized network dual-band node architectures," Optical Fiber
costs presented are obtained in relation to 10 Communication Conference (OFC), OSA Technical
Digest (Optical Society of America), San Diego, CA,
Gbps transponder cost, which is considered USA, paper M2G.5, Mar. 2020.
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