Tunable Preemption Controls for a Cellular Emergency Network

In this paper we introduce the preemption threshold based strategy to cellular networks for supporting emergency traffic. With the new strategy, in addition to providing immediate access for emergency traffic, a certain amount of resources can be protected for public traffic by tuning the preemption threshold. Also, with the assumption that preempted users will restart the session after resumption, we find that a conservation law holds for the average duration of calls that succeed or fail to finish. Numerical results about the evaluation of this strategy are presented and show an obvious improvement over related strategies.