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.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

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


    Beteiligte:


    Erscheinungsdatum :

    2020-05-01


    Format / Umfang :

    232559 byte





    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Adaptive K-Repetition Transmission Employing Site Diversity Reception for 5G NR Uplink Grant-Free URLLC

    Dataesatu, Arif / Sanada, Kosuke / Hatano, Hiroyuki et al. | IEEE | 2023


    Enhancing URLLC Uplink Configured-grant Transmissions

    Le, Trung-Kien / Salim, Umer / Kaltenberger, Florian | IEEE | 2021


    Performance Evaluation of Grant-Free Transmission for Uplink URLLC Services

    Wang, Chao / Chen, Yan / Wu, Yiqun et al. | IEEE | 2017


    Low Latency Interference Cancellation for Uplink URLLC Repetition Transmission

    Nakamura, Osamu / Hamaguchi, Yasuhiro / Takahashi, Takumi et al. | IEEE | 2020


    System Level Analysis of eMBB and Grant-Free URLLC Multiplexing in Uplink

    Abreu, Renato / Jacobsen, Thomas / Pedersen, Klaus et al. | IEEE | 2019