Throughput-Guaranteed Resource-Allocation Algorithms for Relay-Aided Cellular OFDMA System

Radio resource allocation for downlink transmissions in a cellular system based on orthogonal frequency-division multiple access (OFDMA) has been the subject of many research studies over the past few years. Nowadays, increasing attention has turned to cellular systems with relays, but only a few al...

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Veröffentlicht in:IEEE transactions on vehicular technology Jg. 58; H. 4; S. 1951 - 1964
Hauptverfasser: Kaneko, M., Popovski, P., Hayashi, K.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: New York, NY IEEE 01.05.2009
Institute of Electrical and Electronics Engineers
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Schlagworte:
Adaptive algorithms
Algorithm design and analysis
Algorithms
Applied sciences
Base stations
Cellular
Connection and protection apparatus
Design engineering
Downlink
Electrical engineering. Electrical power engineering
Equipments and installations
Exact sciences and technology
Frame relay
Frequency diversity
Information, signal and communications theory
Mobile radiocommunication systems
Multicarrier system
Multiple access
Multiplexing
multiuser diversity
OFDM
orthogonal frequency-division multiple access (OFDMA)
Physical layer
radio resource allocation
Radio spectrum management
Radiocommunications
relay system
Relay systems
Resource allocation
Resource management
Signal and communications theory
Stations
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Throughput
Transmission and modulation (techniques and equipments)
Wireless networks
Parameter estimation
Relay
Base station
Wireless telecommunication
Resource allocation
Frequency division multiple access
Information rate
Power system stability
Downlink
Cell network
radio resource allocation
relay system
Channel estimation
Algorithm complexity
Cell system
Mobile radiocommunication
Multiple access
Multicarrier system
Outage
multiuser diversity
Multicarrier
Algorithm
Information transmission
orthogonal frequency-division multiple access (OFDMA)
Orthogonal frequency division multiplexing
System simulation
Resource management
ISSN:0018-9545, 1939-9359
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Zusammenfassung:Radio resource allocation for downlink transmissions in a cellular system based on orthogonal frequency-division multiple access (OFDMA) has been the subject of many research studies over the past few years. Nowadays, increasing attention has turned to cellular systems with relays, but only a few algorithms have been designed for OFDMA-based relay systems. In this paper, resource-allocation schemes are proposed for the cases of one relay station (RS) and multiple RSs in the cell. Due to the specific design of these algorithms, which operate in an RS-aided base station centralized manner, the amount of required channel-state information and algorithm complexity are minimized, making them suited for practical use. The idea of adaptive RS activation is introduced, where the frame structure is adapted depending on the active RS. Different numbers of relays are considered, and the corresponding algorithms are accordingly adapted. Simulation results show that our algorithms achieve a very good throughput/outage tradeoff.
Bibliographie:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
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ISSN:0018-9545
1939-9359
DOI:10.1109/TVT.2008.2005058