Energy efficiency performance of relay-assisted Power-Line Communication networks

Tonello

et al. 2018

IEEE Systems Journal

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. Index Terms-Decode-and-forward (DF) relaying, energy efficiency, energy-harvesting, impulsive noise, outage probability, power allocation, power line communication (PLC). I. INTRODUCTION P OWER line communication (PLC) technology, both narrow-band and broadband, has enabled many smart grid applications and high-speed home-networking solutions [1]-[3]. On the one hand, the main advantage of this network over the other existing alternatives is that no new wiring installations are required. On the other hand, however, this vast infrastructure was never designed to carry communication Khaled M. Rabie and B. Adebisi are with the school of Electrical Engineering,

Section: Related Workmentioning

confidence: 99%

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

Tonello

et al. 2018

IEEE Systems Journal

“…The energy efficiency in this study is calculated as the transmit energy-per-bit, which is basically the total transmit power over the data rate. The adopted power consumption profile in our analysis takes into account not only the dynamic power but also the static power of the PLC modems consumed by the circuitry; for more details, the reader may refer to [14], [23].…”

Section: System Modelmentioning

confidence: 99%

Energy-Per-Bit Performance Analysis of Relay-Assisted Power Line Communication Systems

IEEE Trans. on Green Commun. Netw.

Gacanin

et al. 2018

This study provides a comprehensive analysis of the energy efficiency performance for different relaying schemes over the non-Gaussian power line communication (PLC) channel. Specifically, amplify-and-forward (AF), decode-and-forward (DF), selective DF (SDF) and incremental DF (IDF) relaying systems are investigated. For a more realistic scenario, the power consumption profile of the PLC modems is assumed to consist of both dynamic and static power. For each system, we derive accurate analytical expressions for the outage probability and the minimum energy-per-bit performance. For the sake of comparison and completeness as well as to quantify the achievable gains, we also analyze the performance of a single-hop PLC system. Monte Carlo simulations are provided throughout the paper to validate the theoretical analysis. Results reveal that AF relaying over the non-Gaussian PLC channel does not always enhance the performance and that the IDF PLC system offers the best performance compared to all other schemes considered. It is also shown that increasing the channel variance, which is related to the PLC network branching, and impulsive noise probability can considerably deteriorate the system performance. Furthermore, when the end-to-end distance is relatively small, it is found that the single-hop PLC approach can perform better than AF relaying.

“…In addition, to achieve best energy efficiency, extensive simulations are conducted solving the optimization problem of the energyharvesting time factor in several scenarios. For a more realistic power consumption scenario, we incorporate the dynamic power, static power and idle power of PLC modems in our power consumption profile; similar to [10] and [9]. The results reveal that the proposed system is able to offer remarkable energy efficiency enhancements when the end-to-end distance is sufficiently large.…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, energy efficiency and power consumption performance in relaying PLC networks has received considerable amount of research interest and several attempts have been made by the scientific community towards this direction, see e.g. [7]- [9]. Although those studies have looked into various relaying scenarios with and without considering the static power (the power consumed by the PLC modem when no data is being transmitted), they all have focused on only optimizing the system parameters to reduce the transmit power.…”

Section: Introductionmentioning

confidence: 99%

More robust decode-and-forward relaying over impulsive noise power line channels

2017 IEEE International Symposium on Power Line Communications and Its Applications (ISPLC)

Tonello

et al. 2017

This paper discusses the issue of energy-efficiency in power line communication (PLC) systems and introduces decode-and-forward (DF) energy-harvesting based relaying. The performance of the proposed system is analyzed in terms of the energy efficiency for which accurate analytical expressions are derived. To highlight the achievable gains, we also evaluate the performance of both the conventional DF relaying and the directlink systems. The presented simulated results clearly demonstrate the correctness of our analysis as well as the advantage of the proposed system over the conventional relaying and direct-link approaches. Additionally, it is shown that the proposed scheme will become more energy efficient as the harvested noise energy becomes larger.