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Time and Power Allocation for Energy Efficiency Maximization in Wireless-Powered Full-Duplex Relay Systems

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Názov: Time and Power Allocation for Energy Efficiency Maximization in Wireless-Powered Full-Duplex Relay Systems
Autori: Xin Song, Yue Ni, Xiuwei Han, Lei Qin, Li Dong
Zdroj: Future Internet, Vol 11, Iss 10, p 205 (2019)
Informácie o vydavateľovi: MDPI AG
Rok vydania: 2019
Zbierka: Directory of Open Access Journals: DOAJ Articles
Predmety: full-duplex wireless power communication network, energy harvesting, time allocation algorithm, power allocation algorithm, half-duplex relay, Information technology, T58.5-58.64
Popis: In this paper, we propose an optimal time and power allocation scheme in a wireless power supply full-duplex (FD) relay system, where we consider the number of relay antennas in the energy harvesting stage. At the same time, the energy efficiency optimization problem of the system is structured, where optimization issues related to time allocation factors and power allocation are established. For the FD dual-antenna and the FD single-antenna energy harvesting system, energy efficiency function is proven to be a concave function over the time-switch factor, and the optimal time-switching factor is theoretically obtained using the Lambert function. Then, according to the given value range of the optimal time switching factor, the optimal power distribution scheme is obtained by analyzing the derivative function of the system energy efficiency and using the properties of the Lambert function. The time-switching factor and transmission power are optimally selected at the wireless power supply FD relay. Results reveal that the performance of energy efficiency of the dual-antenna energy harvesting at the FD relay outperforms that of the single-antenna. Moreover, our results demonstrate that FD relay systems always substantially boost the energy efficiency compared with half-duplex (HD) relay systems.
Druh dokumentu: article in journal/newspaper
Jazyk: English
Relation: https://www.mdpi.com/1999-5903/11/10/205; https://doaj.org/toc/1999-5903; https://doaj.org/article/f893b80227e84660821654fe49a3f68a
DOI: 10.3390/fi11100205
Dostupnosť: https://doi.org/10.3390/fi11100205
https://doaj.org/article/f893b80227e84660821654fe49a3f68a
Prístupové číslo: edsbas.64F5681E
Databáza: BASE
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  – Url: https://doi.org/10.3390/fi11100205#
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  Label: Title
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  Data: Time and Power Allocation for Energy Efficiency Maximization in Wireless-Powered Full-Duplex Relay Systems
– Name: Author
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  Data: <searchLink fieldCode="AR" term="%22Xin+Song%22">Xin Song</searchLink><br /><searchLink fieldCode="AR" term="%22Yue+Ni%22">Yue Ni</searchLink><br /><searchLink fieldCode="AR" term="%22Xiuwei+Han%22">Xiuwei Han</searchLink><br /><searchLink fieldCode="AR" term="%22Lei+Qin%22">Lei Qin</searchLink><br /><searchLink fieldCode="AR" term="%22Li+Dong%22">Li Dong</searchLink>
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  Data: Future Internet, Vol 11, Iss 10, p 205 (2019)
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  Data: MDPI AG
– Name: DatePubCY
  Label: Publication Year
  Group: Date
  Data: 2019
– Name: Subset
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  Data: Directory of Open Access Journals: DOAJ Articles
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  Data: <searchLink fieldCode="DE" term="%22full-duplex+wireless+power+communication+network%22">full-duplex wireless power communication network</searchLink><br /><searchLink fieldCode="DE" term="%22energy+harvesting%22">energy harvesting</searchLink><br /><searchLink fieldCode="DE" term="%22time+allocation+algorithm%22">time allocation algorithm</searchLink><br /><searchLink fieldCode="DE" term="%22power+allocation+algorithm%22">power allocation algorithm</searchLink><br /><searchLink fieldCode="DE" term="%22half-duplex+relay%22">half-duplex relay</searchLink><br /><searchLink fieldCode="DE" term="%22Information+technology%22">Information technology</searchLink><br /><searchLink fieldCode="DE" term="%22T58%2E5-58%2E64%22">T58.5-58.64</searchLink>
– Name: Abstract
  Label: Description
  Group: Ab
  Data: In this paper, we propose an optimal time and power allocation scheme in a wireless power supply full-duplex (FD) relay system, where we consider the number of relay antennas in the energy harvesting stage. At the same time, the energy efficiency optimization problem of the system is structured, where optimization issues related to time allocation factors and power allocation are established. For the FD dual-antenna and the FD single-antenna energy harvesting system, energy efficiency function is proven to be a concave function over the time-switch factor, and the optimal time-switching factor is theoretically obtained using the Lambert function. Then, according to the given value range of the optimal time switching factor, the optimal power distribution scheme is obtained by analyzing the derivative function of the system energy efficiency and using the properties of the Lambert function. The time-switching factor and transmission power are optimally selected at the wireless power supply FD relay. Results reveal that the performance of energy efficiency of the dual-antenna energy harvesting at the FD relay outperforms that of the single-antenna. Moreover, our results demonstrate that FD relay systems always substantially boost the energy efficiency compared with half-duplex (HD) relay systems.
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  Data: article in journal/newspaper
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  Data: English
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  Label: Relation
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  Data: https://www.mdpi.com/1999-5903/11/10/205; https://doaj.org/toc/1999-5903; https://doaj.org/article/f893b80227e84660821654fe49a3f68a
– Name: DOI
  Label: DOI
  Group: ID
  Data: 10.3390/fi11100205
– Name: URL
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  Data: https://doi.org/10.3390/fi11100205<br />https://doaj.org/article/f893b80227e84660821654fe49a3f68a
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      – Text: English
    Subjects:
      – SubjectFull: full-duplex wireless power communication network
        Type: general
      – SubjectFull: energy harvesting
        Type: general
      – SubjectFull: time allocation algorithm
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      – SubjectFull: power allocation algorithm
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      – SubjectFull: half-duplex relay
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      – SubjectFull: T58.5-58.64
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      – TitleFull: Time and Power Allocation for Energy Efficiency Maximization in Wireless-Powered Full-Duplex Relay Systems
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            – TitleFull: Future Internet, Vol 11, Iss 10, p 205 (2019
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