Paper Info
Title
An Efficient Relay Placement Method With Power Allocation For Mimo Two-Way Multi-Hop Networks
Abstract
MIMO two-way multi-hop networks are considered in which the radio resource is fully reused in all multi-hop links to increase spectrum efficiency while the adjacent interference signals are cancelled by MIMO processing. In addition, the nodes in the multi-hop network optimize their transmit powers to mitigate the remaining overreach interference. Our main contribution in this paper is to investigate an efficient relay placement method with power allocation in such networks. We present two formulations, namely QoS-constrained optimization and SINR balancing, and solve them using a sequential geometric programming method. The proposed algorithm takes advantage of convex optimization to find an efficient configuration. Simulation results show that relay placement has an important impact on the effectiveness of power allocation to mitigate the interference. Particularly, we found that an uniform relay location is optimal only in power-limited scenarios. With optimal relay locations, significant end-to-end rate gain and power consumption reduction are achieved by SINR balancing and QoS-constrained optimization, respectively. Furthermore, the optimal number of hops is investigated in power or interference-limited scenarios.
Year
DOI
Venue
2013
10.1587/transcom.E96.B.1176
IEICE TRANSACTIONS ON COMMUNICATIONS
Keywords
Field
DocType
multi-hop, two-way relay, node placement, power allocation, geometric programming, convex optimization, MIMO, interference cancellation, SINR balancing, QoS constrained optimization
Computer science,Single antenna interference cancellation,Computer network,MIMO,Hop (networking),Geometric programming,Convex optimization,Relay
Journal
Volume
Issue
ISSN
E96B
5
0916-8516
Citations 
PageRank 
References 
0
0.34
3
Authors
4
Name
Order
Citations
PageRank
Gia Khanh Tran111824.54
Rindranirina Ramamonjison2544.28
Kei Sakaguchi330249.22
Kiyomichi Araki428656.35