inis 24(2): e4

Research Article

Improving Performance of the Typical User in the Indoor Cooperative NOMA Millimeter Wave Networks with Presence of Walls

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  • @ARTICLE{10.4108/eetinis.v11i2.5156,
        author={Sinh Cong Lam and Xuan Nam Tran},
        title={Improving Performance of the Typical User in the Indoor Cooperative NOMA Millimeter Wave Networks with Presence of Walls},
        journal={EAI Endorsed Transactions on Industrial Networks and Intelligent Systems},
        volume={11},
        number={2},
        publisher={EAI},
        journal_a={INIS},
        year={2024},
        month={4},
        keywords={Cooperative Communication, Non-orthogonal Multiple-access, Beyond 5G, Poisson Point Process},
        doi={10.4108/eetinis.v11i2.5156}
    }
    
  • Sinh Cong Lam
    Xuan Nam Tran
    Year: 2024
    Improving Performance of the Typical User in the Indoor Cooperative NOMA Millimeter Wave Networks with Presence of Walls
    INIS
    EAI
    DOI: 10.4108/eetinis.v11i2.5156
Sinh Cong Lam1,*, Xuan Nam Tran2
  • 1: Vietnam National University, Hanoi
  • 2: Le Quy Don Technical University
*Contact email: lamsinhcong@gmail.com

Abstract

INTRODUCTION: The beyond 5G millimeter wave cellular network system is expecting to provide the high quality of service in indoor areas.  OBJECTIVES: Due to the high density of obstacles, the cooperative communication technique is employed to improve the user's desired signal power by finding more than one appropriate station to serve that user.  METHODS: While the conventional system utilizes additional equipment such as Reconfigurable Intelligent Surfaces (RIS) and relays to enable the cooperative features, the paper introduces a new network paradigm that utilizes the second nearest Base Station (BS) of the typical user as the Decode and Forward (DF) relay. Thus, depends on the success of decoding the message from the user' serving BS of the second nearest BS, the typical user can work with and without assistance from the relay whose operation follows the discipline of the power-domain NOMA technique. In the case of with relay assistance, the Maximum Ratio Combining technique is utilized by the typical user to combine the desired signals.  RESULTS: To examine the performance of the proposed system, the Nakagami-m and the newly developed path loss model, which considers the density of walls and their properties, are adopted to derive the coverage probability of the user with and without relay assistance. The closed-form expressions of this performance metric are derived by Gauss quadrature and Welch-Satterthwaite approximation.