A Novel Two-Stage Dynamic Spectrum Sharing Scheme in Cognitive Radio Networks

• Published in: China communications Vol. 13; no. 6; pp. 236 - 248
• Main Authors: Zhang, Guodong, Heng, Wei, Liang, Tian, Meng, Chao, Hu, Jinming
• Format: Journal Article
• Language: English
• Published: China Institute of Communications 01.06.2016; National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, Jiangsu Province, China
• Subjects: Cognitive radio; cognitive wireless networks; Games; Nash equilibrium; noncooperative game theory; spectrum sharing; Wireless networks; Wireless sensor networks; 共享; 合作模式; 性能比较; 无线电网络; 纳什均衡; 迭代算法; 通信开销; 高频谱; cognitive wireless networks; noncooperative game theory; Nash Equilibrium; spectrum sharing
• ISSN: 1673-5447
• DOI: 10.1109/CC.2016.7513218

In order to enhance the efficiency of spectrum utilization and reduce communication overhead in spectrum sharing process, we propose a two-stage dynamic spectrum sharing scheme in which cooperative and noncooperative modes are analyzed in both stages. In particular, the existence and the uniqueness of Nash Equilibrium（NE） strategies for noncooperative mode are proved. In addition, a distributed iterative algorithm is proposed to obtain the optimal solutions of the scheme. Simulation studies are carried out to show the performance comparison between two modes as well as the system revenue improvement of the proposed scheme compared with a conventional scheme without a virtual price control factor.