In this paper, we analyse the optical burst switched (OBS) network, discuss the OBS node architecture. In OBS network, to construct a good data structure is very important. The OBS incoming data are assembled into basic units, referred to as data bursts, which are then transported over the optical core network. As to the OBS signaling, it is performed out of band by control packets that carry information such as the length, the edge-node-destination address. OBS is a promising solution for the all-optical WDM networks.