## 1 Introduction  
Relays are proven suitable solutions for extending networking coverage. In addition, Multiple-Input-Multiple-Output (MIMO) Non-Orthogonal Multiple Access (NOMA) technologies are effective methods for enhancing the capacity of fifth-generation (5G) wireless communication networks and beyond. The NOMA technique improves spectral sharing and the capability for a greater number of connections in the same time slot/frequency [1, 2]. The NOMA technique in fifth-generation (5G) wireless communication networks and beyond could therefore serve large numbers of devices. The NOMA technique's feature is the ability to broadcast a superimposed signal to devices in the network with different Power Allocation (PA) factors [3]. The farthest device with poorest Channel State Information (CSI) is allocated the largest PA factor compared to other PA factors allocated to other devices. Successive Interference Cancellation (SIC) [4] implemented at the receiver device removes interference before the device decodes its own message in the superimposed signal by treating other device information which has a stronger PA factor [5]. Major studies have significantly contributed to NOMA through the application of new techniques in 5G networks and beyond. In [6], the authors verified that the system performance of NOMA networks is dependent on power resource allocation. The main aims of NOMA networksare to serve more devices [7] and fairness in Quality of Service (QoS) [8]. In achieving these aims, previous studies verify that the system performance of NOMA wireless networks are significantly affected by power resource allocation strategies [9; 10]. The authors verified that PA factors in NOMA networks could be allocated by device CSI and device data rate thresholds [11]. Recently, a cooperative networking solution has drawn much attention as an emerging method to extend network coverage. Specifically, in a cooperative NOMA network, a relay is deployed to receive and forward superimposed signals to the devices outside the network area. The radius of the network coverage is thus expanded, and its reliability is improved by enhancing QoS for devices [12]. Some major techniques may be fully deployed at the relay, namely Half-Duplex (HD), Full-Duplex (FD), Decode-and-Forward (DF), and Amplify-and-Forward (AF) [13]. Some studies have made significant contributions to cooperative NOMA [14; 15]. These studies have shown that the system performance of NOMA wireless networks can be improved by deploying multiple relays in combination with the selection of the best relay in individual schemes [16; 17; 18; 19]. In addition, to improve the capacity of a NOMA wireless network, the massive MIMO technique [20] is emerging as a good solution which extends the MIMO technique [21; 22]. However, under this technique, networked devices equip more antennas, leading to increased costs for hardware and RF. The authors proposed the deployment of a TAS protocol which selects the best channel [23; 24]. The authors also designed the pre-coding matrices for optimal system throughput in a multi-cell MIMO-NOMA network. However, massive NOMA has many research challenges which require careful investigation, such as extending the massive MIMO network which consider relaying and TAS and SWIPT protocols. Another potential technology for future 5G networks and beyond is the simultaneous transmission of information with Radio Frequency (RF) and Energy Harvesting (EH) [25; 26; 27; 28; 29; 30; 31]. A study [26] on wireless EH offers a deep survey of the advantages of SWIPT. The authors surveyed several SWIPT technologies: SWIPT enabled multi-carrier systems, full-duplex SWIPT systems, etc. Given the explosion in the number of networked devices, for example Internet of Things (IoTs) devices, the energy issue is especially important. Time Switching (TS) [28] and Power Splitting (PS) [29; 30; 31] represent a solution for simultaneous data and energy transmission.