How to shrink the gap between the service provision capacity and the QoS requirements of user applications is one of key issues of the naive OBS in multi-service carry environment. This paper extended the concept of optical burst, and proposed a novel OBS architecture (i.e., O-OBS). Besides, this paper also discuss some enhancements of O-OBS from node fimctional models, hierarchy optical burst framing, resource reservation and scheduling, and traffic grooming. r sub-frames data in every level frame, and to have n level of burst frames. Hence, each sub-frame in k-level burst frames should occupy II I bandwidth of data channel. If the rate v of a flow is in the range (l/r k + 1 , lI l ], the flow can be aggregated to k-level burst frames. If some sub-frames in k-I-level burst frames don't fill at full, the flow can be aggregated to k-I-level in preference to k-level. Through the hierarchy framing mechanism, G-OBS can achieve an optimal mapping between its service provision capacity and the QoS requirements of user applications [5].