Title :
Power control in cooperative cognitive radio networks by geometric programming
Author :
Li, Dong ; Dai, Xianua
Author_Institution :
Sch. of Inf. & Sci. Technol., Sun Yat-Sen Univ., Guangzhou, China
Abstract :
Cognitive users (CUs) are allowed to access licensed bands without causing harmful interference to primary users (PUs). However, the quality of service (QoS) of CUs can not be guaranteed when CUs experience bad channel conditions in direct transmission between the cognitive source and its destination. In this paper, we consider the problem of cooperative transmission in cognitive radio networks. The transmit power of cognitive source and the corresponding relay are adjusted by geometric programming, in order to minimize the total power consumption. Simulation results are provided to confirm the effectiveness of the proposed algorithm.
Keywords :
cognitive radio; geometric programming; interference (signal); power control; quality of service; telecommunication control; wireless channels; bad channel conditions; cognitive source; cognitive users; cooperative cognitive radio networks; cooperative communication; cooperative transmission; direct transmission; geometric programming; harmful interference; licensed bands; power control; primary users; quality of service; transmit power; Cognitive radio; Energy consumption; Interference; Power control; Power system modeling; Power system relaying; Protective relaying; Protocols; Quality of service; Relays; cognitive radio; cooperative communication; geometric programming; power control;
Conference_Titel :
Communications, 2009. APCC 2009. 15th Asia-Pacific Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-4784-8
Electronic_ISBN :
978-1-4244-4785-5
DOI :
10.1109/APCC.2009.5375674
