In this paper, we investigate the energy efficiency (EE) optimization in the user-centric Cell-Free massive MIMO (CF mMIMO) system for Ultra-Reliable Low-Latency Communications (URLLC), where access points (APs) use maximum ratio transmission for downlink transmission. We first formulate an optimization problem to maximize the system EE while taking the finite blocklength achievable rate in URLLC into consideration. To deal with the intractable achievable rate in the objective function and the constraint, we derive a convex lower bound of it using successive convex approximation (SCA), and then reformulate the original problem into a second-order cone programming (SOCP). Next, we propose a low-complexity iterative algorithm to solve the SOCP by applying SCA. Simulation results show that the proposed method provides near-optimal performance in terms of Branch-and-Bound (BnB), and provide insights into the influences of blocklength, system parameters and AP clustering schemes on system EE.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Energy Efficiency Optimization of User-Centric Cell-Free Massive MIMO System for URLLC Services


    Beteiligte:
    Huang, Yige (Autor:in) / Jiang, Yanxiang (Autor:in) / Zheng, Fu-Chun (Autor:in) / Zhu, Pengchen (Autor:in) / Wang, Dongming (Autor:in)


    Erscheinungsdatum :

    24.06.2024


    Format / Umfang :

    1133733 byte





    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Can Massive MIMO Support URLLC?

    Yan, Hangsong / Ashikhmin, Alexei / Yang, Hong | IEEE | 2021



    Uplink Power Allocation Scheme for User-Centric Cell-free Massive MIMO Systems

    Sarker, Manobendu / Fapojuwo, Abraham O. | IEEE | 2022


    Evaluation of Uplink Capacity of User-Cluster-Centric Cell-Free massive MIMO

    Takahashi, Ryo / Matsuo, Hidenori / Xia, Sijie et al. | IEEE | 2022


    Joint AP On/Off and User-Centric Clustering for Energy-Efficient Cell-Free Massive MIMO Systems

    Ito, Masaaki / Kanno, Issei / Amano, Yoshiaki et al. | IEEE | 2022