Impact of Traffic Patterns and Burst Assembly on Energy Consumption in OBS Networks

Increasing the attention of Green IT, many researches have been studied to reduce energy consumption occurring in network equipments. To reduce energy consumption in network equipments, sleeping concept has been explored in IEEE 802.3az Task Force Group. In this paper, we study factors that affect the performance of the sleeping mode in Optical Burst Switching (OBS) networks: traffic patterns and burst assembly. To do this, we model a router system that supports sleeping mode by using OPNET modeler. We implement various traffic generators and burst assembly methods. Through the simulation, we evaluate the impact of traffic patterns and burst assembly methods to the performance of sleeping mode by analyzing sleeping time, the number of transitions and packet delay.