International Journal of Wireless and Microwave Technologies(IJWMT)
ISSN: 2076-1449 (Print), ISSN: 2076-9539 (Online)
Published By: MECS Press
IJWMT Vol.1, No.5, Oct. 2011
Power Allocation for Balancing Spectrum Efficiency and Power Consumption in Cognitive Relay Networks
Full Text (PDF, 214KB), PP.39-46
In order to guarantee the QoS requirement of secondary users and not to affect the outage probability of primary user in cognitive relay networks, we propose two optimal power allocation models: (1) maximizing the transmission rate of secondary users; (2) minimizing the total power consumption. Theory analysis shows that two optimal power allocation models conflict between spectrum efficiency and power consumption. Furthermore, an optimal power allocation model which joints the transmission rate and the total power consumption in cognitive relay networks is proposed. By using the Lagrangian method, the optimization algorithm for this model is designed. The proposed algorithm can achieve the trade-off between the transmission rate and the total power consumption by varying the weight. Simulation results show that the proposed algorithm can effectively adjust the transmission rate and the total power consumption of secondary users.
Cite This Paper
Lun Tang,Qing Li,Qian-Bin Chen,"Power Allocation for Balancing Spectrum Efficiency and Power Consumption in Cognitive Relay Networks", IJWMT, vol.1, no.5, pp.39-46, 2011
Leila Musavian, Sonia Aissa, "Cross-layer Analysis of Cognitive Radio Relay Networks under Quality of Service Constraints," Vehicular Technology Conference,2009.VTC Spring 2009. IEEE 69th.
Dong Li, Xianua Dai, "Power Control in Cooperative Cognitive Radio Networks by Geometric Programming," Proceedings of the 15th Asia-Pacific Conference on Communication (APCC 2009)-027.
Hongbing Cheng, Member, Yu-Dong Yao, "Cognitive-Ralay Based Inter-Cell Interference Cancelation in Cellular Systems," IEEE Trans. Vehicular Technology, Forthcoming, pp.1-9, 2010.
Jan Mietzner, Lutz Lampe, Robert Schober, "Distributed Transmit Power Allocation for Multihop Cognitive-Radio Systems, " IEEE Trans. Wirel. Commun. vol. 8, no. 10, pp.5187-5201, October. 2009.
Wenjing Yue, Baoyu Zheng, Qingmin Meng. "Optimal Power Control for Cognitive Relay Networks over Fading Channels," Second International Conference on Future Networks. pp.281-285, March. 2010.