DocumentCode :
660049
Title :
Optimal Energy-Efficient Relay Selection and Power Allocation for Cognitive Two-Way Relay Network Using Physical-Layer Network Coding
Author :
Jia Liu ; Guixia Kang ; Ying Zhu ; Yingjiao Zhao ; Junling Mao
Author_Institution :
Key Lab. of Universal Wireless Commun., Beijing Univ. of Posts & Telecommun., Beijing, China
fYear :
2013
fDate :
2-5 Sept. 2013
Firstpage :
1
Lastpage :
5
Abstract :
This paper addresses relay selection(RS) and power allocation(PA) issues for a physical-layer network coding (PNC) relay based secondary user (SU) communication in cognitive radio networks, in which two secondary transceiver nodes exchange their information with the assistance of a relay under interference power threshold (IPT) constraints. We propose an optimal energy-efficient RS and PA (OE-RS-PA) scheme to minimize total energy consumption per bit with the sum rate constraint and IPT constraints. A closed-form solution for optimal allocation of transmit power among the SU nodes and relay node are then derived analytically and confirmed by numerical results. Furthermore, numerical simulations and comparisons are presented to illustrate the performance of the proposed scheme.
Keywords :
approximation theory; cognitive radio; network coding; optimisation; radio transceivers; relay networks (telecommunication); telecommunication power management; IPT constraints; OE-RS-PA scheme; PNC relay based secondary user communication; cognitive radio networks; interference power threshold constraints; optimal energy-efficient RS and PA scheme; physical-layer network coding relay based SU communication; power allocation issues; relay selection issues; secondary transceiver nodes; sum rate constraint; transmit power; Cognitive radio; Optimized production technology; Relays; Resource management; Transceivers;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Vehicular Technology Conference (VTC Fall), 2013 IEEE 78th
Conference_Location :
Las Vegas, NV
ISSN :
1090-3038
Type :
conf
DOI :
10.1109/VTCFall.2013.6692329
Filename :
6692329
Link To Document :
بازگشت