2nd International ICST Conference on Performance Evaluation Methodologies and Tools

Research Article

Distributed Subchannel Assignment in an OFDMA Relay

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  • @INPROCEEDINGS{10.4108/valuetools.2007.1968,
        author={Ari Hottinen and Tiina Heikkinen},
        title={Distributed Subchannel Assignment in an OFDMA Relay},
        proceedings={2nd International ICST Conference on Performance Evaluation Methodologies and Tools},
        proceedings_a={VALUETOOLS},
        year={2010},
        month={5},
        keywords={Relay network resource allocation noncooperative game theory OFDM},
        doi={10.4108/valuetools.2007.1968}
    }
    
  • Ari Hottinen
    Tiina Heikkinen
    Year: 2010
    Distributed Subchannel Assignment in an OFDMA Relay
    VALUETOOLS
    ICST
    DOI: 10.4108/valuetools.2007.1968
Ari Hottinen1,*, Tiina Heikkinen2,*
  • 1: Radio Communications CTC Nokia Research Center P.O. Box 407, FIN-00045 Nokia Group, Finland
  • 2: Department of Computer Science P.O. Box 68, FIN-00014, University of Helsinki, Finland
*Contact email: ari.hottinen@nokia.com, tiina.heikkinen@cs.helsinki.fi

Abstract

The paper studies a distributed OFDMA system in which the transmitting nodes (source and relay) have access to channel information and to some interference-related information. Distributed subchannel allocation is modelled as a noncooperative game where the players are the source nodes. Channel-aware source nodes opportunistically select their subchannels while a channel-aware relay node assigns the input subchannels at relay to appropriate output subchannels in a way that maximizes the sum of utilities in terms of signal-to-noise ratio. Numerical examples illustrate the performance of distributed subchannel assignment; opportunistic channel allocation implies a trade-off between the average capacity and fairness.