A new QoS-Aware Green Dynamic Bandwidth Allocation in Ethernet Passive Optical Network

Electricity consumption grows rapidly in the recent years. To reduce global greenhouse gas (GHG), it is necessary to utilize the energy consumption of the networks. In the broad-band access network, Passive Optical Network (PON) refers as a green network which uses less power consumption compared to the other technologies. Optical Line Unit (ONU) potentially can be chosen to implement energy-saving methods in PON. There are two ways to improve the energy-efficiency based on the hardware redesign or/and software-based schemes. Sending the ONU to sleep mode is a common method which is proposed by researchers or industries. Sleep mode is referred to turn off the transmitter and/or receiver to save energy. However, this method can cause the packet delay and reduce the Qos/QoE metrics. In this paper, we introduce a software-based Green Dynamic Bandwidth Allocation (DBA) to reduce the ONU energy consumption and guarantee overall QoS metric. Simulation results show that the proposed Green DBA can improve the power saving without affecting the overall QoS.