### Related Work
\begin{table}
\begin{tabular}{p{42.7 pt} p{113.8 pt} p{113.8 pt} p{113.8 pt}} \hline \hline
**Citation** & **Theme** & **Discussed Technologies** & **Target** \\ \hline [4] & C-RAN-based FD-NOMA & Relay-based cooperative communication and D2D & Performance comparison and measurements \\ \hline [5] & Applications of FD-NOMA & Cellular, relay and cognitive radio & Comparison and discussion \\ \hline [6] & QoS with 5G spectrum & FD, massive MIMO, NOMA, SWIPT & Performance evaluation and comparison between the technologies \\ \hline [7] & Combination of potential technologies & massive MIMO, mmWave, FD, NOMA, carrier aggregation, CR, and network ultra-densification & Combined coupling factors, problems and possible solutions for the existing literature combination \\ \hline [3] & Spectrum Sharing in 5G & D2D, in-band FD, NOMA, and LTE & Discussion of research methodologies and challenges in 5G networks \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Comparison study of existing papers that include NOMA with OFDMA. Three ways for the deployment of the IBFD are shown in Figure 1: (a) shows the combined NOMA downlink and uplink system where the transmitter and the recipient can simultaneously transmit and receive the signals, (b) shows the Device-to-Device (D2D) NOMA communication system, where the near user forwards the signal to the far user with and without a direct link between the near and far user, (c) shows the Two-Way Relay (TWR) NOMA communication system, where a relay assists the far user by receiving its signals from the transmitter. The relay forwards the previously received signal in the FD mode along with the reception of a new signal in the same time slot. IBFD and D2D communication have common characteristics including better performance at short distances and reduced self-interference at low power transmit signals [3]. IBFD seems to be more spectrally efficient. Therefore, this literature focuses on the important problems, solutions, benefits, challenges and exploration in the proposed system with IBFD. In IBFD mode, the wireless nodes cannot decode the signals easily. Characteristically, the transmitted signal is approximately 100 dB higher than the received signal which causes eroded Signal Interference (SI). This reduces its capacity below HD. According to consensus by both academia and industry, it is very difficult to achieve SI cancellation/suppression for IBFD integration [16]. The increasing interference cumulatively reduces the data rate, latency, secrecy capacity and throughput. RF digital interference cancellation [3], advance antennas cancellation and digital base band, channel estimation and power allocation [4] offers the possible solutions for IBFD. Hybrid resources [17] that switch between FD and HD have been invented for developing the radio resources and simultaneously improving the SE. Separated resources are needed like antennas for the separate transmission with the minimum possible interference. The use of FD with NOMA is also helpful to prevent the spectral resources and the use of other existing devices to avoid system complexity. One solution is proposed in this article with R-IBFD. R-IBFD not only tackles the interference involved but also provide security due to inaccessible information to the Eve. For the security improvement and confound the eavesdropper, a cooperative jammer [18] is used to analyse the outage performance of the system. A multi-point cooperative relay selection scheme [19], is atypical to the conventional cooperative communication, where each user assists the next further user for downloading its signal until the furthest user downloads its signal successfully. Authors used Channel State Information  
Figure 1: Three different ways of combining FD with NOMA. (**a**) When transmission is in both downlink and uplink. (**b**) D2D communication with a direct and no direct link between transmitter and the distant user. (**c**) The use of a FD mode relay for assisting the distant user.