Impact of burst length differentiation on QoS performance in OBS networks

In this paper we address the problem of quality of service (QoS) provisioning in OBS networks focusing in efficiently support of two different classes of service, namely high priority (HP)-to transport loss/delay sensitive traffic like real-time voice; and best effort (BE)-for regular data traffic. First, we provide a brief overview of the state of the art on the addressed problem focusing on the main drawbacks of presented both offset time differentiation and burst pre-emption (BP) schemes. Then we describe a burst length differentiation (BLD) technique that aims to improve the performance when applied together with other QoS techniques. The performance results show that BLD bring profits in particular when combining with BP scheme.