Energy-Efficient Sensing Mechanism for Licensed-Assisted Access Under Non-Saturated Traffic Condition
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Title
- Energy-Efficient Sensing Mechanism for Licensed-Assisted Access Under Non-Saturated Traffic Condition
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Author(s)
- 김용재; 박은혜; 송유재; 한영남
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Alternative Author(s)
- 송유재
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Publication Year
- 2017-12-11
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Abstract
- This paper investigates the energy-efficiency oflicensed-assisted access (LAA) which enable long-term evolutionsystems to operate in unlicensed spectrum. Since Wi-Fi with802.11 n/ac is a typical radio access technology in the unlicensedspectrum, we consider a scenario that the LAA small-cell basestations (SCBSs) are deployed together with Wi-Fi access points.We propose three different listen-before-talk (LBT) schemesaccording to the channel sensing mechanisms for LAA SCBC,and establish Markov chain models for each scheme under nonsaturatedtraffic condition. Using these analytical models, theenergy-efficiencies of LAA SCBSs that perform the differentLBT schemes are investigated. We also propose the algorithmto obtain the optimal contention window size of LAA SCBSsby which total energy-efficiency of networks is maximized whilesatisfying the required energy-efficiency of both LAA and Wi-Finetworks. Numerical results show that the LBT scheme whichhas an efficient channel sensing mechanism outperforms theother LBT schemes for the energy-efficiency perspective.edspectrum, we consider a scenario that the LAA small-cell basestations (SCBSs) are deployed together with Wi-Fi access points.We propose three different listen-before-talk (LBT) schemesaccording to the channel sensing mechanisms for LAA SCBC,and establish Markov chain models for each scheme under nonsaturatedtraffic condition. Using these analytical models, theenergy-efficiencies of LAA SCBSs that perform the differentLBT schemes are investigated. We also propose the algorithmto obtain the optimal contention window size of LAA SCBSsby which total energy-efficiency of networks is maximized whilesatisfying the required energy-efficiency of both LAA and Wi-Finetworks. Numerical results show that the LBT scheme whichhas an efficient channel sensing mechanism outperforms theother LBT schemes for the energy-efficiency perspective.
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URI
- https://sciwatch.kiost.ac.kr/handle/2020.kiost/23521
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Bibliographic Citation
- Asia-Pacific Conference on Communications (APCC), pp.1 - 6, 2017
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Publisher
- IEEE
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Type
- Conference
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Language
- English
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