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Quantifying spectrum, cost, and energy efficiency in fixed-grid and flex-grid networks [Invited]

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8 Author(s)
Palkopoulou, E. ; Athens Inf. Technol. Center, Athens, Greece ; Angelou, M. ; Klonidis, D. ; Christodoulopoulos, K.
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Single and multi-carrier networks offering channel rates up to 400 Gb/s are evaluated under realistic reach parameters. It is found that efficient spectrum utilization and fine bit-rate granularity are essential to achieve cost and energy efficiency. Additionally, the break-even cost of flexible orthogonal frequency division multiplexing transponders is examined under different settings. The break-even cost of a flexible transponder corresponds to the cost value for which the total cost of the network is equal to that of the related single-line-rate network. The impact of the traffic load, the additional cost required for flex-grid optical cross connects, the cost of spectrum, as well as the cost of fixed-grid transponders is examined.

Published in:

Optical Communications and Networking, IEEE/OSA Journal of  (Volume:4 ,  Issue: 11 )

Date of Publication:

Nov. 2012

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