Distributed Cooperative Control for Large-Scale IoT Networks

We have been faced with the new era of IoT, where various devices are connected to the Internet in addition to the conventional PCs and mobile phones. Most of the IoT devices are managed and controlled through wireless communications. On the other hand, most radio frequency bands have already been allocated to various existing systems. Thus, it is important to solve the spectrum exhaustion problem and to improve the spectrum utilization. To tackle this problem, cognitive radio has been studied, in which unlicensed users, i.e., secondary users (SUs), utilize the spectrum of a licensed user, i.e., primary user (PU), while avoiding interference in PU’s communications. In this research, we aim to achieve a distributed cooperative control mechanism that can consider both cooperation among SUs for improving detection performance of PU’s communication and competitive relationship among SUs to acquire individual communication opportunities.