Fairness-Improving Adaptive Routing in Optical Burst Switching Mesh Networks

In most existing studies of optical burst switching networks, adaptive routing is based on deflection routing and/or feedback from the past intervals which often introduce excessive transmission delay and architectural complexity. Our proposed three novel adaptive routing schemes, however, consider the transient link congestion at the moment when the bursts arrive; moreover they can utilize the same offset times for the same node pairs implying zero additional transmission delay and simplicity. The proposed schemes also aim to address the intrinsic unfairness defect of existing popular signaling protocols by increasing the effective link utilization. In performance results, we proceed to show that with our routing techniques, the fairness among the bursts with different hop counts can be greatly improved; and our methods can decrease the burst loss probability significantly as well in large-scale optical burst switching WDM mesh networks.