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    For More Energy Efficient Dual-hop DF Relaying Power Line Communication Systems

    Rabie, KM, Adebisi, B, Tonello, AM and Nauryzbayev, G (2018) For More Energy Efficient Dual-hop DF Relaying Power Line Communication Systems. IEEE Systems Journal, 12 (2). pp. 2005-2016. ISSN 1932-8184

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    Abstract

    Energy efficiency in multi-hop cooperative power line communication (PLC) systems has recently received considerable attention in the literature. In order to make such systems more energy-efficient, this paper proposes a relaying technique equipped with energy-harvesting capabilities. More specifically, we consider a dual-hop decode-and-forward (DF) broadband PLC relaying system in which the relay exploits the high noise inherent in PLC channels to further enhance energy efficiency; this system will be referred to as DF with energy-harvesting (DF-EH). This study deploys, particularly, the time-switching relaying protocol for energy-harvesting. An accurate analytical expression for the energy efficiency and a closed-form expression for the average outage probability of the proposed system are derived and then verified with Monte Carlo simulations. For the sake of comparison and to highlight the achievable gains, we also analyze the energy efficiency performances and the average outage probabilities of the conventional DF relaying system, i.e. without energy-harvesting, as well as that of the direct-link approach. Furthermore, various frequency selection and power allocation strategies, namely, optimal frequency selection, random frequency selection and equal power allocation, exploiting the multiple power cables, are studied. Then, the impact of several system parameters such as the energy-harvesting time factor, various idle power consumption profiles, relay location, power allocation as well as different noise scenarios are examined. The results reveal that the proposed DF-EH system is able to provide energy efficiency improvements of more than 30% compared to the conventional DF relaying scheme. It is also shown that the proposed system with optimal frequency selection performs better at low SNR whereas at high SNR the equal power allocation based system will have the best performance.

    Item Type: Article
    Peer-reviewed: Yes
    Date Deposited: 17 Jan 2017 13:14
    Publisher: Institute of Electrical and Electronics Engineers (IEEE)
    Additional Information: This is an author accepted manuscript of a paper accepted for publication in IEEE Systems Journal, published by IEEE. "(c) 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works."
    Divisions: Faculties > Science and Engineering
    Subject terms: Operations Research
    URI: https://e-space.mmu.ac.uk/id/eprint/617572
    DOI: https://doi.org/10.1109/JSYST.2016.2639321
    ISSN 1932-8184

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