Dynamic Power Management at the Access Node and Customer Premises in Point-to-Point and Time-Division Optical Access

This paper investigates power-saving mechanisms for network elements in optical access networks. In order to enhance the achievable power-saving performance while satisfying QoS requirements, two power-saving schemes are proposed and applied separately to point-to-point (PtP) optical access networks and time-division multiplexed passive optical networks (TDM-PONs). We demonstrate that the power-saving mechanisms can be applied not only to optical network units (ONUs) but also to the network elements at the central office to reduce the energy costs. Simulation results show that by applying the proposed power-saving schemes, the maximum achievable power savings per subscriber of PtP and TDM-PON systems are attained up to 54% and 57%, respectively.