To meet the anticipated challenges of the fifth-generation and beyond wireless networks, multiple candidate technologies are needed to be integrated. Motivating by this, two cooperative simultaneous wireless information and power transfer (SWIPT) protocols are proposed in this study for cellular internet of things (IoT) networks by exploiting non-orthogonal multiple access considering two different scenarios. In the proposed SWIPT protocols, both the signal of source and co-channel interference (CCI) signals are exploited as a potential source of energy. The source considered as a cellular base station communicates with its user via the assistance of energy-constrained IoT nodes acting as relays. In the first scenario, one of the assisting IoT nodes acts as a best relay to forward source information and its own information simultaneously in the same channel by exploiting non-orthogonal multiple access. The best relay is selected based on the maximum harvested energy from the signal of source and CCI signals. Second scenario is the extended version of the first scenario, where two extra energy constraint IoT transmitter–receiver pairs are assumed to be present. To evaluate the performance of the proposed protocols, delay-tolerant throughput, outage probability, delay-limited throughput, and energy efficiency are investigated over Nakagami-$m$ fading channels. Finally, comparative results with the existing strategies are demonstrated to show the effectiveness of the proposed protocols.

为了应对第五代及以后的无线网络挑战，需要集成多种候选技术。为此，本研究针对蜂窝物联网（IoT）网络提出了两种协作的同时进行的无线信息和功率传输（SWIPT）协议，其中考虑了两种不同的情况，通过利用非正交多址访问。在提出的SWIPT协议中，源信号和同信道干扰（CCI）信号均被用作潜在的能源。被认为是蜂窝基站的源通过充当中继的能量受限的IoT节点与其用户进行通信。在第一种情况下 IoT辅助节点之一是通过利用非正交多路访问在同一通道中同时转发源信息及其自身信息的最佳中继。基于从源信号和CCI信号中获取的最大能量来选择最佳继电器。第二种情况是第一种情况的扩展版本，其中假定存在两个额外的能源约束IoT收发器对。为了评估所提出协议的性能，在Nakagami上研究了延迟容忍吞吐量，中断概率，延迟受限吞吐量和能效。假设存在两个额外的能量约束物联网IoT收发器对。为了评估所提出协议的性能，在Nakagami上研究了延迟容忍吞吐量，中断概率，延迟受限吞吐量和能效。假设存在两个额外的能量约束物联网IoT收发器对。为了评估所提出协议的性能，在Nakagami上研究了延迟容忍吞吐量，中断概率，延迟受限吞吐量和能效。$米$衰落的频道。最后，与现有策略的比较结果证明了所提出协议的有效性。