Coordination of Energy Efficient Sensing and Transmission in Cognitive Radio Networks
To improve spectrum efficiency, Cognitive Radio (CR) is designed to allow unlicensed (secondary) users to utilize the licensed spectrum when it is not used by the licensed (primary) users. Because of the dynamic nature of cognitive radio network, the resource allocation targeting at best system performance becomes more and more important. In this paper, a proposal aiming at improving the energy efficiency for cognitive radio networks and at the same time keeping an optimal system performance, is provided. On one hand, the secondary users aim to accurately sense the spectrum availability which costs them in terms of energy.