In this paper, the non-orthogonal multiple access (NOMA) and simultaneous wireless information and power transfer (SWIPT) are applied to wireless caching networks (WCN). Particularly, in the content pushing stage, base station sends the most popular contents to helpers with NOMA and the helpers harvest energy from the received signals. Then, the helpers send the requested files to the users with NOMA in the content delivery stage. In the content pushing stage, we minimize the maximum delay of the helpers by jointly optimizing the power allocation and time switching factors. Due to the non-convexity of the problem, the bisection method and two-layer iterative algorithm are devised to solve the problem. In the content delivery stage, the energy efficiency (EE) optimization problem is formulated under the quality-of-service, energy harvesting, and transmit power constraints. By using the nonlinear fractional programming theory and the Lagrange dual method, the original optimization problem is solved and the optimal power and time allocation coefficients are obtained. Simulation results show that the proposed algorithm reduces the delay of the helpers and improves the EE performance of helpers compared to the benchmark schemes.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Joint Power and Time Allocation in NOMA-SWIPT Enabled Wireless Caching Networks


    Beteiligte:
    Ren, Yuan (Autor:in) / Qian, Kaiyue (Autor:in) / Zhang, Xuewei (Autor:in) / Jiang, Fan (Autor:in) / Lu, Guangyue (Autor:in)


    Erscheinungsdatum :

    01.09.2022


    Format / Umfang :

    455693 byte





    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Flight to Efficiency: Trajectory Optimization in SWIPT-Enabled UAV-Assisted NOMA for Future Wireless Networks

    Baduge, Dinith Primal P. Rathu / Perera, Tharindu D. Ponnimbaduge / Jayakody, Dushantha Nalin K. | IEEE | 2024




    A Linear MMSE Receiver for SWIPT-enabled Wireless Networks

    Guo, Yuan / Skouroumounis, Christodoulos / Krikidis, Ioannis | IEEE | 2022


    Energy-Efficient Resource Allocation for 6G Backscatter-Enabled NOMA IoV Networks

    Khan, Wali Ullah / Javed, Muhammad Awais / Nguyen, Tu N. et al. | IEEE | 2022