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

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, s...

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Bibliographic Details
Published in2011 IEEE Global Telecommunications Conference - GLOBECOM 2011 pp. 1 - 6
Main Authors Xiaoyi Liu, Li Chen, Xin Zhang, Dacheng Yang
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.12.2011
Subjects
Complexity theory
Indexes
Joints
OFDM
Relays
Resource management
Search methods
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ISBN9781424492664
1424492661
ISSN1930-529X
DOI10.1109/GLOCOM.2011.6133908

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Summary: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.
ISBN:9781424492664
1424492661
ISSN:1930-529X
DOI:10.1109/GLOCOM.2011.6133908