A fairness-based preemption algorithm for LTE-Advanced

In this paper, we propose a fairness-based preemption algorithm for 3GPP LTE-Advanced. It considers bearers´ priorities as well as their QoS over-provisioning with respect to their minimum QoS needs into the partial preemption decision. We define a preemption contribution metric for each established bearer and we evaluate the proposed scheme both in terms of inter- and intra-priority preemption fairness. Through a simulation approach, we conclude substantial improvements in preemption fairness when compared to a traditional preemption approach. We discuss that the proposed scheme does not affect the main performance measurements of the network, i.e. the bearers´ blocking and dropping probabilities due to congestion. Finally, we discuss that the preemption contribution metric can be effectively used to variate the total generated revenue.