Adaptive Repetition Control Using Terminal Mobility for Uplink Grant-Free URLLC

Shinichi Ozaku, Yukiko Shimbo, Hirofumi Suganuma, Fumiaki Maehara

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

This paper proposes an adaptive repetition control using terminal mobility to alleviate the packet collision for uplink grant-free (GF) ultra-reliable and low-latency communications (URLLC). In GF, the packet collision among mobile stations (MSs) becomes a serious problem because the grant-issuing procedure conducted in grant-based (GB) transmission is eliminated. Especially in the K-repetitions method, intra-cell interference is increased due to excessive repetitions, resulting in decreased reliability. In the proposed approach, the number of necessary repetitions is determined using fading correlation easily obtained from the terminal speed. This is because the time diversity benefit within repetitions is dependent on the fading correlation. Using the proposed repetition control, the number of repetitions can be reduced especially in the low fading correlation, alleviating the packet collision. The effectiveness of our proposed method is demonstrated in an actual multi-user URLLC scenario by computer simulations.

本文言語English
ホスト出版物のタイトル2020 IEEE 91st Vehicular Technology Conference, VTC Spring 2020 - Proceedings
出版社Institute of Electrical and Electronics Engineers Inc.
ISBN(電子版)9781728152073
DOI
出版ステータスPublished - 2020 5月
イベント91st IEEE Vehicular Technology Conference, VTC Spring 2020 - Antwerp, Belgium
継続期間: 2020 5月 252020 5月 28

出版物シリーズ

名前IEEE Vehicular Technology Conference
2020-May
ISSN(印刷版)1550-2252

Conference

Conference91st IEEE Vehicular Technology Conference, VTC Spring 2020
国/地域Belgium
CityAntwerp
Period20/5/2520/5/28

ASJC Scopus subject areas

  • コンピュータ サイエンスの応用
  • 電子工学および電気工学
  • 応用数学

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