A study of energy efficient transparent relay using cooperative strategy

Kim Haesik, Tao Chen

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

    1 Citation (Scopus)


    The purpose of a multi-hop relay in WiMAX system is to enhance cell coverage, throughput and system capacity. IEEE802.16j standard specifies a multi-hop relay and IEEE802.16m standard recently considers adopting a multi-hop relay. Besides, many research groups insist that cooperative communication including transparent relay saves energy as well as brings better performance. However, they don't provide specific data for transparent relay in a realistic communication system such as WiMAX. In this paper, we study on how much power saving it can be achieved when using transparent relay with cooperative strategy. We firstly propose cooperative strategy for transparent relay in order to achieve diversity gain and then investigate how much gain we can achieve and how much power saving we can have in WiMAX model. The spectral efficiency of a distributed Alamouti scheme is N/2N sym/sec/Hz for transparent relay but the one of the proposed scheme is (N-1)/N sym/sec/Hz which is same as original purpose of transparent relay. In addition it is shown that transparent relay with cooperative strategy has up to 60% power saving under the given simulation configuration. (9 refs.)
    Original languageEnglish
    Title of host publicationProceedings of the IEEE 73rd Vehicular Technology Conference, VTC Spring 2011
    Place of PublicationPiscataway, NJ, USA
    PublisherIEEE Institute of Electrical and Electronic Engineers
    Number of pages5
    ISBN (Electronic)978-1-4244-8331-0
    ISBN (Print)978-1-4244-8332-7, 978-1-4244-8329-7
    Publication statusPublished - 2011
    MoE publication typeA4 Article in a conference publication
    EventIEEE 73rd Vehicular Technology Conference, VTC Spring 2011 - Yokohama, Japan
    Duration: 15 May 201118 May 2011


    ConferenceIEEE 73rd Vehicular Technology Conference, VTC Spring 2011
    Abbreviated titleVTC Spring 2011


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