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Journal Article 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
DOI
https://dx.doi.org/10.4218/etrij.15.2415.0033
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