Joint admission and power control for cognitive radio cellular networks

In cognitive radio cellular networks (CogCell), the secondary users (SUs) can be admitted to the base station (BS) provided that the interferences to the primary users (PUs) are no higher than the pre-defined thresholds. In addition, different SUs may make different payments and require different quality of service (QoS). In this paper, we investigate the maximally achievable revenue obtained from SUs subjected to the interference constraints on PUs and QoS requirements of SUs. To solve the identified issue, we propose an efficient joint admission and power control scheme using a minimal revenue efficiency removal algorithm (JAPC-MRER). In comparison with the other two schemes JAPC-MSRA and JAPC-Random, our strategy can achieve much higher revenue with guaranteed interference requirements and QoS demands. In addition, the proposed scheme is evaluated with the effects of the key parameters, i.e. the number of PUs, the number of SUs and the interference threshold.