A Controlled Preemption Scheme for Emergency Applications in Cellular Networks

In this paper, we introduce a threshold-based preemption strategy for supporting emergency traffic in cellular networks. Compared with current commercially used policies, our scheme can not only guarantee a certain amount of resources to public customers but can also provide immediate access for emergency users and flexibility for providers to adapt to different requirements and operating scenarios. In addition, under the combined preemption and queuing framework, interesting analytical relationships among channel occupancy, gross service time, and success probability for public traffic are revealed. Based on this, guidelines to further improve the satisfaction of public customers can be provided.