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학술지 Dynamic Resource Adjustment for Coexistence of LAA and Wi-Fi in 5 GHz Unlicensed Bands
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저자
최지훈, 김은경, 장성철
발행일
201510
출처
ETRI Journal, v.37 no.5, pp.845-855
ISSN
1225-6463
출판사
한국전자통신연구원 (ETRI)
DOI
https://dx.doi.org/10.4218/etrij.15.2415.0033
협약과제
15MI2100, (통합)초연결 스마트 모바일 서비스를 위한 5G 이동통신 핵심기술개발, 정현규
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.
키워드
Channel access, Coexistence, Long-term evolution, LTE, Time adjustment, Unlicensed spectrum, Wi-Fi
KSP 제안 키워드
5 GHz, Analytical model, Channel Access(CA), Channel access mechanism, Conventional methods, Dynamic resource, IEEE 802.11, Licensed Assisted Access(LAA), Long term Evolution(LTE), Non-saturation, Numerical simulations