Comparison between power efficiencies of mixed-line rate over Single-Line Rate in spectral efficient WDM networks with signal quality guarantee

Mixed-Line Rate (MLR) in a cost-efficient manner scope with the heterogeneous nature of constantly increasing traffic demands in core networks. In the same time, telecom operators have to decide how to introduce into the system new 10G, 40G, and/or 100G channels regarding (i) data requests, (ii) utilization of available network resources such as fiber frequency band, and (iii) an overall network power consumption that even more increases due to extra signal regeneration required because of the even more higher spectral efficiency. Hence, this paper aims at comparing, in a Wavelength Division Multiplexing (WDM) systems level, the power efficiency between numbers of MLR solutions over Single-Line Rate (SLR) with the highest acceptable spectral efficiency while guaranteeing the certain signal quality at the receiving node of an end-to-end connection.