Sleep-based DBA Algorithm for Energy Efficiency by End Points Collaboration in EPON

Ethernet passive optical network (EPON) offers large bandwidth that requires less power consumption. The EPON systems require dynamic bandwidth allocation (DBA) algorithm to share a medium for different users with fairness and quality of services. In energy efficient DBA (EE-DBA) algorithm, the optical network units (ONUs) enter the power saving mode in lower traffic condition. However, the main limitation of the existing EE-DBA algorithm is that it requires to keep optical line terminal (OLT) in active state for all the time. That is why some energy is wasted in the OLT side. For mitigating the excess energy consumption by the OLT, we propose a sleep-based DBA (SB-DBA) algorithm for EPON system. In the SB-DBA scheme, both the OLT and ONUs enter into the power-saving mode for reducing overall energy consumption in the network. Simulations are used to evaluate the performance of the SB-DBA scheme. Comparative analysis of simulated results proves that the energy consumption of the proposed SB-DBA scheme is less than the existing EE-DBA scheme with similar end-to-end packet delay.