In this letter, we consider a downlink cellular network where a cellular user (CU) not only decodes information but also harvests energy. By reusing the spectrum resource of the CU, a device-to-device (D2D) transmitter sends its own signals to a D2D receiver. In order to protect the CU from the interference due to the D2D signals, we propose transmit power control schemes for the D2D transmission without increasing the outage probability of the CU. This is possible since the CU’s information loss due to the D2D signals can be compensated by the CU’s energy harvesting gain from the D2D signals. For asymptotic performance analysis, we provide a lower bound on the D2D outage probability. The numerical results show that the proposed schemes outperform the conventional scheme.

中文翻译：

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具有本地 CSI 的 SWIPT 蜂窝网络中 D2D 通信的中断最优和次优功率控制

在这封信中，我们考虑了一个下行链路蜂窝网络，其中蜂窝用户 (CU) 不仅解码信息而且收集能量。通过重用 CU 的频谱资源，设备到设备 (D2D) 发射机将自己的信号发送到 D2D 接收机。为了保护 CU 免受 D2D 信号的干扰，我们提出了 D2D 传输的发射功率控制方案，而不会增加 CU 的中断概率。这是可能的，因为 D2D 信号导致的 CU 信息损失可以通过 CU 来自 D2D 信号的能量收集增益来补偿。对于渐近性能分析，我们提供了 D2D 中断概率的下限。数值结果表明，所提出的方案优于传统方案。