In this paper, device to device (D2D) network is studied to support transmission in close distance among group of two users. Such two users benefit from new technique of multiple access, namely non-orthogonal multiple access. Two modes of D2D are considered, such as direct and relay links. Energy harvesting and design of multiple antennas have main impacts on system performance. We derive the closed-form expressions of outage probability for two devices in many scenarios. The Decode and Forward relaying scheme is adopted in this study. To ensure the quality of service (QoS) for the devices, suitable mode can be decided based on specific demand. We compare system performance by varying main parameters such as power allocation factors or transmit signal to noise ratio. Numerical results are performed to verify the effectiveness of the proposed D2D transmission strategies.

本文研究了设备到设备（D2D）网络，以支持两个用户组之间的近距离传输。这样的两个用户受益于多址新技术，即非正交多址。考虑了D2D的两种模式，例如直接链路和中继链路。能量收集和多天线设计对系统性能有主要影响。在许多情况下，我们导出了两种设备的中断概率的闭合形式。本研究采用解码转发中继方案。为了确保设备的服务质量（QoS），可以根据特定需求确定合适的模式。我们通过改变主要参数（例如功率分配系数或传输信噪比）来比较系统性能。