Performance evaluation of VCSEL ONU using energy-efficient Just-In-Time dynamic bandwidth allocation algorithm

We previously proposed an energy-efficient Just-In-Time based dynamic bandwidth allocation algorithm for the 10 Gbps Ethernet Passive Optical Network. The algorithm exploits the capability of the Vertical-Cavity Surface-Emitting Optical Laser based Optical Network Units to operate in sleep or doze mode during its idle time. The algorithm takes into account the upstream traffic demand at the Optical Network Units in determining the bandwidth allocated to each Optical Network Unit during each cycle, thus eliminating possible collisions in the network. In this work we evaluate the performance of the Vertical-Cavity Surface-Emitting Laser and the Distributed Feedback Laser based Optical Network Units under the proposed algorithm. The simulation results indicate that the Vertical-Cavity Surface-Emitting Laser based Optical Network Unit outperforms the DFB ONU in terms of the energy efficiency using the proposed algorithm.