ATCB: A QoS guarantee mechanism in the optical burst switching internet backbone

In this paper, we investigate how the quality of service (QoS) can be guaranteed and reliable transmission can be supported in the OBS-based Internet backbone. We propose the adjustable-time-counter-based (ATCB) burst assembly and the non-real time packet retransmission mechanisms, and apply them in the ingress router of the OBS Internet backbone to guarantee the quality of real time applications and lossless requirement of non-real time services. Simulation results show that the burst blocking probability using the ATCB burst assembly, compared with that using the time-counter-based (TCB) and burst-length-threshold-based (BLTB) mechanisms, acquires an improvement. The delay, loss and jitter of real time service conform to the QoS requirement. Meanwhile, the delay of non-real time service also falls in the acceptable range.