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Dynamic Resource Adjustment for Coexistence of LAA and Wi-Fi in 5 GHz Unlicensed Bands
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- Authors
- Jihoon Choi, Eunkyung Kim, Sungcheol Chang
- Issue Date
- 2015-10
- Citation
- ETRI Journal, v.37, no.5, pp.845-855
- ISSN
- 1225-6463
- Publisher
- 한국전자통신연구원 (ETRI)
- Language
- English
- Type
- Journal Article
- Project Code
- 15MI2100, Development of 5G Mobile Communication Technologies for Hyper-connected smart services, Chung Hyun Kyu
- 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.
- KSP Keywords
- 5 GHz, Analytical model, Channel Access(CA), Channel access mechanism, Conventional methods, Dynamic resource, IEEE 802.11, Licensed Assisted Access(LAA), Non-saturation, Numerical simulations, Practical implementation