ETRI Journal

  • 제37권5호
  • /
  • Pages.845-855
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  • 2015
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  • 1225-6463(pISSN)
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  • 2233-7326(eISSN)
한국전자통신연구원 (Electronics and Telecommunications Research Institute)
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Dynamic Resource Adjustment for Coexistence of LAA and Wi-Fi in 5 GHz Unlicensed Bands

  • Choi, Jihoon (School of Electronics and Information Engineering, Korea Aerospace University) ;
  • Kim, Eunkyung (Communications & Internet Research Laboratory, ETRI) ;
  • Chang, Sungcheol (Communications & Internet Research Laboratory, ETRI)
  • 투고 : 2015.02.16
  • 심사 : 2015.08.17
  • 발행 : 2015.10.01
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초록

To enable the coexistence of Licensed Assisted Access (LAA) and Wi-Fi in 5 GHz unlicensed bands, a new channel access mechanism is proposed. Accounting for the fairness between LAA and Wi-Fi, the proposed mechanism finds the optimal transmission time ratio by adaptively adjusting the transmission durations for LAA and Wi-Fi. In addition, we propose a new analytical model for the distributed coordination function of IEEE 802.11 through some modifications of conventional analytical models for saturation and non-saturation loads. By computing the activity ratio of Wi-Fi, the proposed analytical model is able to control the time ratio between LAA and Wi-Fi, which is required for practical implementation of the proposed access mechanism. Through numerical simulations, the proposed channel access mechanism is compared with conventional methods in terms of throughput and utility.

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참고문헌

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피인용 문헌

  1. Channel Selection for Spectrum Sharing in Wireless Networks vol.38, pp.5, 2015, https://doi.org/10.4218/etrij.16.2616.0007
  2. Towards Harmonious Coexistence in the Unlicensed Spectrum: Rational Cooperation of Operators vol.17, pp.11, 2017, https://doi.org/10.3390/s17102432
  3. LTE in the Unlicensed Spectrum: A Survey vol.35, pp.1, 2015, https://doi.org/10.1080/02564602.2016.1251344
  4. Multi-Cell LTE-U/Wi-Fi Coexistence Evaluation Using a Reinforcement Learning Framework vol.20, pp.7, 2015, https://doi.org/10.3390/s20071855