Abstract: Optical burst switching (OBS) is one of the promising switching technologies of the all optical networks.When burst contention occurs at an intermediate switch due to limited resources,the bursts that are in contention will be dropped.In this paper,we propose an edge buffer based contention resolution (EBR) scheme, which could mitigate and resolve contention by deflecting the contending bursts to the electronic buffer of the schedule module in the edge nodes which are directly connected to core switching nodes.The simulation of EBR scheme under self-similar traffic shows that our scheme could achieve much better performance on the burst dropping rate and its simplicity makes it easy to co-exist with other contention resolution schemes.