Power saving mechanism and performance analysis for 10 Gigabit-class passive optical network systems

In this paper, we characterize the energy-saving scheme for the 10 Gigabit-class PON systems discussed in FSAN/ITU-T and IEEE 802.3av. Sleep mode is used to reduce the power consumption in the PON system. An optical network unit (ONU) goes to sleep mode after negations with optical line terminal (OLT) and wakes up when the sleep duration is up. The OLT decides the ONU's next work mode depending on the downstream traffic condition. An analytical model is performed to study the specified sleep mode under the assumption of downstream traffic. The performance metrics are derived with respect to energy consumption and packet delay to evaluate the proper sleep parameters.