Fair Bandwidth Allocation with Distance Fairness Provisioning in Optical Burst Switching Networks

Although fair bandwidth allocation (FBA) can be achieved in optical burst switching (OBS) networks, the actual transmission rate of the flow not only depends on the fairly allocated rate but also its burst loss probability, which tends to increase with larger hop counts due to the high-loss characteristic of OBS. The previous proposals provide FBA with distance fairness provisioning in various ways, e.g., providing distance fairness only when traffic in the network is over the link capacity. This paper introduces a rate and distance fairness preemption (RDFP) scheme to achieve max-min FBA, to isolate services, to provide protection among flows, and to ensure distance fairness for traffic transmitted under the max-min rate. Overload traffic in RDFP is not provided distance fairness and it has the lowest preemptive priority. Therefore, the well-behaved flows do not suffer from the misbehavior of flows. Simulation results demonstrate the efficiency of RDFP.