An Efficient Admission Control Algorithm to Keep Connections of Secondary Users in Cognitive Radio Systems

인지 무선 시스템에서 이차 사용자의 다자 수용 및 연결 유지를 위한 효율적인 알고리즘에 대한 연구

In cognitive radio systems, secondary users, unlicensed users, can use primary users' spectrum to increase spectrum efficiency. At that time, the systems must satisfy primary users' QoS. When secondary users use cognitive radio systems, secondary users communication can be terminated, because of satisfying primary users' QoS. However, secondary users' communication terminating is not good for both secondary users and whole systems. So, cognitive radio systems need an efficient algorithm for secondary users of admission control and keeping connections. In this paper, we present an algorithm which consist of two part, admission control and connections control.