Title :
Quantifying spectrum, cost, and energy efficiency in fixed-grid and flex-grid networks [Invited]
Author :
Palkopoulou, E. ; Angelou, M. ; Klonidis, Dimitrios ; Christodoulopoulos, K. ; Klekamp, Axel ; Buchali, Fred ; Varvarigos, E. ; Tomkos, I.
Author_Institution :
Athens Inf. Technol. Center, Athens, Greece
Abstract :
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.
Keywords :
OFDM modulation; optical fibre networks; telecommunication channels; telecommunication network management; telecommunication network planning; telecommunication traffic; transponders; bit-rate granularity; energy efficiency; fixed-grid networks; flex-grid networks; flexible orthogonal frequency division multiplexing; network planning; optical cross connects; single-line-rate network; spectrum utilization; transponders; Minimization; OFDM; Optical fiber networks; Optical switches; Optimization; Resource management; Transponders; Cost analysis; Energy efficiency; Flexible optical networking; Optical OFDM;
Journal_Title :
Optical Communications and Networking, IEEE/OSA Journal of
DOI :
10.1364/JOCN.4.000B42