Resource Allocation for OFDM-Based Multi-Destination Relay Networks with Direct Links

Author

Liu, Xiaoyi ; Chen, Li ; Zhang, Xin ; Yang, Dacheng

Author_Institution

Wireless Theor. & Technol. (WT&T) Lab., Beijing Univ. of Posts & Telecommun., Beijing, China

fYear

2011

fDate

5-9 Dec. 2011

Firstpage

1

Lastpage

6

Abstract

In this paper, we study the joint resource allocation for the multi-destination amplify-and-forward relay network with direct source-to-destination links based on orthogonal frequency division multiplexing (OFDM) transmission. We aim to maximize the sum rate by jointly optimizing power allocation, subcarrier pairing, user assignment and transmission mode classification subject to the individual power constraints for the source and relay nodes. The optimization problem is solved based on dual method and a near-optimal joint resource allocation scheme is proposed. Besides, two sub-optimal schemes with reduced complexity are presented. Finally, simulation results show that the proposed near-optimal scheme outperforms other sub-optimal resource allocation schemes.

Keywords

OFDM modulation; amplify and forward communication; channel allocation; cooperative communication; diversity reception; optimisation; radio links; OFDM; amplify and forward protocol; direct source to destination links; multi-destination relay networks; near-optimal scheme; optimization; orthogonal frequency division multiplexing; power allocation; resource allocation; sub-optimal schemes; Complexity theory; Indexes; Joints; OFDM; Relays; Resource management; Search methods;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference (GLOBECOM 2011), 2011 IEEE

Conference_Location

Houston, TX, USA

ISSN

1930-529X

Print_ISBN

978-1-4244-9266-4

Electronic_ISBN

1930-529X

Type

conf

DOI

10.1109/GLOCOM.2011.6133908

Filename

6133908