Title :
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
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;
Conference_Titel :
Global Telecommunications Conference (GLOBECOM 2011), 2011 IEEE
Conference_Location :
Houston, TX, USA
Print_ISBN :
978-1-4244-9266-4
Electronic_ISBN :
1930-529X
DOI :
10.1109/GLOCOM.2011.6133908
