Tradeoff between reliability and channel utilization efficiency for 5G NR in unlicensed spectrum

Jing Liu, Qimei Cui, Jian Zhang, Wei Ni, Zesong Fei, Yong Li

科研成果: 书/报告/会议事项章节会议稿件同行评审

1 引用 (Scopus)

摘要

With the development of next fifth generation (5G) communication system, unlicensed spectrum has been considered as a central candidate to offload data traffic. In addition to the most important issue of fair coexistence with Wi-Fi, another problem is to reduce the transmission latency in unlicensed band. Grant-free can be used as an important solution to reduce latency by randomly accessing without scheduling, but it brings lower reliability. In this paper, the grant-free uplink transmission with multiple transmission times (GUL-M) is introduced into the coexistence system of Wi-Fi and new radio in unlicensed band (NR-U) to improve transmission reliability by transmitting one data packet several times at the same time. Based on Markov chain model, the performance of coexistence system is analyzed by deriving the transmission probability and collision probability of Wi-Fi and NR-U with GUL-M. Corroborated by simulations, our approach can achieve the tradeoff between reliability and channel utilization efficiency by dynamically adjusting the transmission times, which shows that as the transmission times increases, there is a maximum throughput efficiency for both NR-U with GUL-M and the coexistence system.

源语言英语
主期刊名IET Conference Publications
出版商Institution of Engineering and Technology
77-82
页数6
版本CP768
ISBN(印刷版)9781839531637
DOI
出版状态已出版 - 2019
活动IET 8th International Conference on Wireless, Mobile and Multimedia Networks - Beijing, 中国
期限: 15 11月 201917 11月 2019

出版系列

姓名IET Conference Publications
编号CP768
2019

会议

会议IET 8th International Conference on Wireless, Mobile and Multimedia Networks
国家/地区中国
Beijing
时期15/11/1917/11/19

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引用此

Liu, J., Cui, Q., Zhang, J., Ni, W., Fei, Z., & Li, Y. (2019). Tradeoff between reliability and channel utilization efficiency for 5G NR in unlicensed spectrum. 在 IET Conference Publications (CP768 编辑, 页码 77-82). (IET Conference Publications; 卷 2019, 号码 CP768). Institution of Engineering and Technology. https://doi.org/10.1049/cp.2019.1153