Energy saving potential estimation for TDM-PON

Energy saving in the information and communication technology field is an important problem identified while designing Future Networks. To reduce energy consumption, it is important to analyze it at each stage of the lifecycle. In case of networks the in-use mode is primarily considered because energy consumption in this mode is usually the major issue for always-on network equipment. The energy consumption of this mode can be controlled by network architecture, capabilities and operations. The article describes the method of measuring power consumption of passive optical network (PON) equipment with time division multiplexing (TDM). Analysis method is based on the ITU Recommendations Y.3021 and Y.3022. Evaluation of potential energy savings is performed for the Gigabit Passive Optical Network equipment of Eltex Russian company using sleep and cyclic sleep modes. The results of the analysis show that the power consumption of the passive optical network can be reduced to 30% when using sleep mode and up to 50% in cyclic sleep mode with an average network load.