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Electronics and Telecommunications Research Institute (한국전자통신연구원)
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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)
  • Received : 2015.02.16
  • Accepted : 2015.08.17
  • Published : 2015.10.01
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Abstract

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.

Keywords

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