we introduce the background of Optical Burst Switching(OBS) generation
the principles and the system architecture of the OBS network and the structure of the edge nodes in the system.Adopting the computer simulation method with the tool of OPNET 8.1.A
we obtain the simulation results that when data packets of the edge nodes have a constant generation rate
the end-to-end delay is relatively fixed;while when the transmission rate of the edge node data packets suddenly increases
the end-to-end delay will have a certain fluctuations.