Notice of Removal: Cross-layer aware enhancement of VoIP mapping in wireless OFDMA systems

Itzik Kitroser, Yehuda Ben-Shimol

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

    Abstract

    This work addresses the problem of efficient broadcasting of resource allocations descriptors for VoIP traffic in mobile OFDMA-based wireless systems. We show that the mapping overhead is substantially reduced by using semi-persistent allocations and that by taking advantage of the periodicity of VoIP frames, generated by a multi-phase vocoder. To handle the impact of mobility on the characteristics of the wireless channel we utilize a cross-layer decision approach to track the channel conditions and predict the expected mobile user behavior such that the system may under-react to channel changes in some cases. We present mapping algorithms that implement these decisions and show by extensive simulations, that with these mapping algorithms the allocation overhead can be substantially reduced in OFDMA-based systems such as WiMAX and LTE, while retaining a low computational complexity (O(n2)).

    Original languageEnglish
    Title of host publication2012 IEEE 27th Convention of Electrical and Electronics Engineers in Israel, IEEEI 2012
    PublisherInstitute of Electrical and Electronics Engineers
    ISBN (Print)9781467346801
    DOIs
    StatePublished - 1 Jan 2012
    Event2012 IEEE 27th Convention of Electrical and Electronics Engineers in Israel, IEEEI 2012 - Eilat, Israel
    Duration: 14 Nov 201217 Nov 2012

    Publication series

    Name2012 IEEE 27th Convention of Electrical and Electronics Engineers in Israel, IEEEI 2012

    Conference

    Conference2012 IEEE 27th Convention of Electrical and Electronics Engineers in Israel, IEEEI 2012
    Country/TerritoryIsrael
    CityEilat
    Period14/11/1217/11/12

    Keywords

    • 3.5G and 4G Technologies
    • Cross-layer design and optimization
    • Resource allocation
    • VoIP

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering

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