Traffic asymmetry balancing in OFDMA-TDD cellular networks

Ellina Foutekova, Sinan Sinanovic, Harald Haas

    Research output: Contribution to journalArticle

    Abstract

    This paper proposes a novel approach to interference avoidance via intercell relaying in cellular OFDMA-TDD (orthogonal frequency division multiple access — time division duplex) systems. The proposed scheme, termed asymmetry balancing, is targeted towards next-generation cellular wireless systems which are envisaged to have ad hoc and multi-hop capabilities. Asymmetry balancing resolves the detrimental base station (BS)-to-BS interference problem inherent to TDD networks by synchronizing the TDD switching points (SPs) across cells. In order to maintain the flexibility of TDD in serving the asymmetry demands of individual cells, intercell relaying is employed. Mobile stations (MSs) in a cell which has a shortage of uplink (UL) resources and spare downlink (DL) resources use free DL resources to off-load UL traffic to cooperating MSs in a neighboring cell using ad hoc communication.
    Original languageEnglish
    Pages (from-to)137-147
    Number of pages11
    JournalJournal of Communications and Networks
    Volume10
    Issue number2
    DOIs
    Publication statusPublished - Jun 2008

    Keywords

    • wireless systems
    • OFDMA
    • cellular networks

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