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Roumeliotis, Anargyros J., Panagopoulos, Athanasios D..  2016.  QoS-Based Allocation Cooperative Mechanism for Spectrum Leasing in Overlay Cognitive Radio Networks. Proceedings of the 20th Pan-Hellenic Conference on Informatics. :49:1–49:6.

The cooperative spectrum leasing process between the primary user (PU) and the secondary user (SU) in a cognitive radio network under the overlay approach and the decode and forward (DF) cooperative protocol is studied. Considering the Quality of Service (QoS) provisioning of both users, which participate in a three-phase leasing process, we investigate the maximization of PU's effective capacity subject to an average energy constraint for the SU under a heuristic power and time allocation mechanism. The aforementioned proposed scheme treats with the basic concepts of the convex optimization theory and outperforms a baseline allocation mechanism which is proven by the simulations. Finally, important remarks for the PU's and the SU's performance are extracted for different system parameters.