DocumentCode :
148574
Title :
Throughput maximization for cognitive radio networks using active cooperation and superposition coding
Author :
Hamza, Doha ; Ki-Hong Park ; Alouini, Mohamed-Slim ; Aissa, Sonia
Author_Institution :
Comput., Electr., & Math. Sci. & Eng. (CEMSE) Div., King Abdullah Univ. of Sci. & Technol. (KAUST), Thuwal, Saudi Arabia
fYear :
2014
fDate :
6-9 April 2014
Firstpage :
1018
Lastpage :
1023
Abstract :
We propose a three-message superposition coding scheme in a cognitive radio relay network exploiting active cooperation between primary and secondary networks. The time resource is split into three transmission phases. The first two phases are dedicated to primary communication, while the third phase is for the secondary´s transmission. We formulate a throughput maximization problem for the secondary network subject to primary user rate constraints and per-node power constraints with respect to the time durations of primary transmission and the power allocation at the primary and the secondary users. We provide an analytical solution to our problem and validate it by numerical optimization. We demonstrate significant throughput gains for both the primary and the secondary users through this active cooperation scheme. We find that most of the throughput gains come from minimizing the second phase transmission time. Finally, we demonstrate the superiority of our proposed scheme compared to best relay selection.
Keywords :
cognitive radio; cooperative communication; network coding; numerical analysis; optimisation; relay networks (telecommunication); active cooperation scheme; best relay selection; cognitive radio relay network; numerical optimization; per-node power constraints; power allocation; primary networks; primary user rate constraints; second phase transmission time minimization; secondary networks; three-message superposition coding scheme; throughput gains; throughput maximization problem; Cognitive radio; Decoding; Encoding; Joints; Optimization; Relays; Throughput;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Wireless Communications and Networking Conference (WCNC), 2014 IEEE
Conference_Location :
Istanbul
Type :
conf
DOI :
10.1109/WCNC.2014.6952248
Filename :
6952248
Link To Document :
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