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Energy Efficient and Subcarrier Allocation for OFDMA based Cooperative Relay Networks

by Vijayabharathi.g, Vijayalakshmi.a
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International Journal of Computer Applications
Foundation of Computer Science (FCS), NY, USA
Volume 47 - Number 20
Year of Publication: 2012
Authors: Vijayabharathi.g, Vijayalakshmi.a
10.5120/7308-0525

Vijayabharathi.g, Vijayalakshmi.a . Energy Efficient and Subcarrier Allocation for OFDMA based Cooperative Relay Networks. International Journal of Computer Applications. 47, 20 ( June 2012), 45-49. DOI=10.5120/7308-0525

@article{ 10.5120/7308-0525,
author = { Vijayabharathi.g, Vijayalakshmi.a },
title = { Energy Efficient and Subcarrier Allocation for OFDMA based Cooperative Relay Networks },
journal = { International Journal of Computer Applications },
issue_date = { June 2012 },
volume = { 47 },
number = { 20 },
month = { June },
year = { 2012 },
issn = { 0975-8887 },
pages = { 45-49 },
numpages = {9},
url = { https://ijcaonline.org/archives/volume47/number20/7308-0525/ },
doi = { 10.5120/7308-0525 },
publisher = {Foundation of Computer Science (FCS), NY, USA},
address = {New York, USA}
}
%0 Journal Article
%1 2024-02-06T20:42:24.573530+05:30
%A Vijayabharathi.g
%A Vijayalakshmi.a
%T Energy Efficient and Subcarrier Allocation for OFDMA based Cooperative Relay Networks
%J International Journal of Computer Applications
%@ 0975-8887
%V 47
%N 20
%P 45-49
%D 2012
%I Foundation of Computer Science (FCS), NY, USA
Abstract

Energy efficient wireless communication is important for battery constrained mobile devices. For mobile devices in a cellular system, uplink power consumption dominates the wireless power budget because of RF power requirements for reliable transmission over long distances. In this work we developed a low-complexity subcarrier-power allocation and relay selection scheme has been developed for maximizing energy efficiency per user in an Orthogonal Frequency Division Multiple Access (OFDMA) cooperative relay network, using full channel state information (CSI), which is available at both relay and BS nodes. The previous works in this area focused on optimizing energy efficiency by maximizing the instantaneous bits-per-Joule metric through Equal-Power Allocation (EPA) schemes resulted in significant energy savings for uplink cellular OFDMA transmissions. It also shows that the proposed scheme has significant improvement on the energy efficiency performance as compared with EPA schemes which allocate equal transmit power to the assigned subcarriers. The simulation results show that the proposed scheme can achieve better performance with less computational complexity as compared to the exhaustive search scheme.

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Index Terms

Computer Science
Information Sciences

Keywords

Energy Efficiency Ofdma Bits Per Joule Equal Power Control Channel State Information

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