Abstract
In this paper we address the issue how to provide QoS control and improve performance in
OBS (Optical Burst Switching) networks. In order to provide proportional differentiated services without
or with absolute constraints in bufferless OBS networks, a Delayed Burst Assignment (DBA) scheme
improves the burst loss performance by giving the burst head packet (BHP) the opportunity of scheduling
its data burst. The proposed schemes offer a response for a till now unsolved issue of traffic aggregation,
thereby making OBS more practical and efficient.
