Cost benchmarking when deploying elastic transponders accounting for margins ageing versus when deploying only 100 Gb/s interfaces

We compare the cost efficiency of optical networks based on elastic transponders when accounting for link margins due to network ageing and on fixed 100 Gb/s PDM-QPSK interfaces technologies. Germany50 and Italian photonic backbone networks are used for providing results during a 10-year period given different throughputs, traffic growth rates and the cost erosions of elastic optical transponders. We also investigate the distribution of the ageing margins and modulation schemes that might be changed during the life of the network, before its end-of-life (EoL).

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