Energy-efficient relay selection and optimal power allocation for performance-constrained dual-hop variable-gain AF relaying

Author

Zafar, Ammar ; Radaydeh, Redha M. ; Yunfei Chen ; Alouini, Mohamed-Slim

Author_Institution

Comput., Electr. & Math. Sci. & Eng. (CEMSE) Div., King Abdullah Univ. of Sci. & Technol. (KAUST), Thuwal, Saudi Arabia

fYear

2013

fDate

9-13 Dec. 2013

Firstpage

3559

Lastpage

3564

Abstract

This paper investigates the energy-efficiency enhancement of a variable-gain dual-hop amplify-and-forward (AF) relay network utilizing selective relaying. The objective is to minimize the total consumed power while keeping the end-to-end signal-to-noise-ratio (SNR) above a certain peak value and satisfying the peak power constraints at the source and relay nodes. To achieve this objective, an optimal relay selection and power allocation strategy is derived by solving the power minimization problem. Numerical results show that the derived optimal strategy enhances the energy-efficiency as compared to a benchmark scheme in which both the source and the selected relay transmit at peak power.

Keywords

amplify and forward communication; cooperative communication; energy conservation; telecommunication power management; amplify-and-forward relay network; dual-hop variable-gain AF relaying; end-to-end SNR; end-to-end signal-to-noise-ratio; energy-efficiency enhancement; energy-efficient relay selection; optimal power allocation; optimal relay selection; power allocation strategy; power minimization problem; selective relaying; Energy efficiency; Erbium; Indexes; Relays; Amplify-and-forward; cooperative relaying; energy-efficiency; optimal power allocation; relay selection; variable-gain relays;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Communications Conference (GLOBECOM), 2013 IEEE

Conference_Location

Atlanta, GA

Type

conf

DOI

10.1109/GLOCOM.2013.6831625

Filename

6831625