er pairing on 5G nonorthogonal multiple-access downlink transmissions. IEEE Transactions on Vehicular Technol- ogy, 65(8):6010-6023, 2015. 46 Z. Ding, H. Dai, and H. V. Poor. Relay selection for cooperative NOMA. IEEE Wireless Communications Letters, 5(4):416-419, 2016. doi: 10.1109/LWC.2016 .2574709. 47 Z. Ding, P. Fan, and H. V. Poor. Random beamforming in millimeter-wave NOMA networks. IEEE Access, 5:7667-7681, 2017. 48 V. Q. Do and I. Koo. Learning frameworks for cooperative spectrum sensing and energy-efficient data protection in cognitive radio networks. Applied Sciences, 8(5):722, 2018. 49 N. T. Do, D. B. Da Costa, T. Q. Duong, and B. An. A BNBF user selection scheme for NOMA-based cooperative relaying systems with SWIPT. IEEE Communications Letters, 21(3):664-667, 2017. doi: 10.1109/LCOMM.2016.2631606. 50 Q. Dong, Y. Chen, X. Li, and K. Zeng. Explore recurrent neural network for PUE attack detection in practical CRN models. In 2018 IEEE International Smart Cities Conference (ISC2), pages 1-9, 2018. 51 K. Doppler, M. Rinne, C. Wijting, C. B. Ribeiro, and K. Hugl. Device-to-device communication as an underlay to LTE-advanced networks. IEEE Communications Magazine, 47(12):42-49, 2009. doi: 10.1109/MCOM.2009.5350367. 52 S. M. Elghamrawy. Security in cognitive radio network: Defense against primary user emulation attacks using genetic artificial bee colony (GABC) algorithm. Bibliography Future Generation Computer Systems, 109:479-487, 2020. ISSN 0167-739X. doi: https://doi.org/10.1016/j.future.2018.08.022. URL http://www.sciencedirect.com/ science/article/pii/S0167739X17321246. 53 M. Fahimi and A. Ghasemi. A distributed learning automata scheme for spectrum management in self-organized cognitive radio network. IEEE Transactions on Mobile Computing, 16(6):1490-1501, 2017. 54 B. Fang, Z. Qian, W. Zhong, and W. Shao. AN-aided secrecy precoding for SWIPT in cognitive MIMO broadcast channels. IEEE Communications Letters, 19(9):1632-1635, 2015. 55 F. Farmani, M. Abbasi-Jannatabad, and R. Berangi. Detection of SSDF a