## 4 Review and Survey Articles
\begin{table}
\begin{tabular}{l l l l l l l l l l} \hline \hline
**Ref.** & **Summary** & \begin{tabular}{l} **Machine** \\ **Leaning** \\ \end{tabular} & \multicolumn{2}{c}{**IoT**} & \begin{tabular}{l} **Security** \\ **Approaches** \\ \end{tabular} & \multicolumn{2}{c}{**VR \& AR**} & \multicolumn{1}{l}{**Energy**} & \multicolumn{1}{l}{**Network**} \\  & & & & & & & & & **Architectures** \\ \hline \hline  & & **Deep Learning** & \
\begin{tabular}{l} **Other** \\ **Methods** \\ \end{tabular} &
\begin{tabular}{l} **ML** \\ \end{tabular} & & & & & & & & \\ \hline
[71] &
\begin{tabular}{l} Energy efficiency of radio access, \\ which is at the heart of wireless \\ networks. \\ \end{tabular} & & ✓ & & & ✓ & ✓ & ✓ & \\ \hline
[73] &
\begin{tabular}{l} Big data and the promise of ML \\ for optimization and decision- \\ making in 5G networks. \\ \end{tabular} & ✓ & & ✓ & ✓ & ✓ & ✓ & \\ \hline
[74] &
\begin{tabular}{l} Classified these three pillars, soft- \\ variation, energy harvesting, \\ and optimization. \\ \end{tabular} & ✓ & & & & & ✓ & ✓ & \\ \hline
[8] &
\begin{tabular}{l} AI into 6G and state of the art in \\ ML. \\ \end{tabular} & ✓ & ✓ & ✓ & & & ✓ & \\ \hline
[9] &
\begin{tabular}{l} AI intergated into localization, \\ UAV communication, surveillance, security and privacy \\ preservation. \\ \end{tabular} & ✓ & & ✓ & ✓ & & ✓ & & ✓ \\ \hline
[10] &
\begin{tabular}{l} Addressing the shortcomings \\ and limitations of IoT and \\ Blockchain. \\ \end{tabular} & ✓ & ✓ & ✓ & & & ✓ & ✓ \\ \hline
[13] &
\begin{tabular}{l} Dimensions of a 6G network, including the air interface. \\ \end{tabular} & ✓ & ✓ & ✓ & & ✓ & \\ \hline
[43] &
\begin{tabular}{l} Requirements and challenges of \\ 6G. \\ \end{tabular} & ✓ & ✓ & ✓ & ✓ & & ✓ & \\ \hline
[44] &
\begin{tabular}{l} Added features and key performance indicators of 5G NR. \\ spectral efficiency security, secrecy, and privacy adorability \\ and customization. \\ \end{tabular} & ✓ & & ✓ & ✓ & & ✓ & \\ \hline
[46] &
\begin{tabular}{l} THz band antenna, fabrication \\ and measurement are presented. \\ \end{tabular} & ✓ & & ✓ & & & ✓ \\ \hline
[47] &
\begin{tabular}{l} Blockchain-Envisioned UAV \\ Communication. \\ \end{tabular} & ✓ & ✓ & ✓ & & ✓ & \\ \hline
[66] &
\begin{tabular}{l} 6G to IoT technologies and service areas. \\ \end{tabular} & A & & ✓ & ✓ & & ✓ & \\ \hline
[75] &
\begin{tabular}{l} Vision and requirements of 6G. \\ \end{tabular} & ✓ & & ✓ & ✓ & & ✓ & \\ \hline
[11] &
\begin{tabular}{l} Investigations security and privacy problems associated with \\ 6G technologies. \\ \end{tabular} & ✓ & & ✓ & & ✓ & ✓ & ✓ \\ \hline
[48] &
\begin{tabular}{l} Application of learning, prediction, and decision-making to \\ manage the stream of humans. \\ \end{tabular} & ✓ & & ✓ & & ✓ & \\ \hline
[72] &
\begin{tabular}{l} Analyze hardware reuse and \\ multiplexing solution to ease the \\ design of UEs that are both cost- \\ effective and energy-efficient. \\ \end{tabular} & ✓ & ✓ & & ✓ & ✓ \\ \hline
[77] &
\begin{tabular}{l} Ability to triple the adaptivity of \\ mmWave and THz. \\ \end{tabular} & ✓ & ✓ & & & ✓ & ✓ \\ \hline
[76] &
\begin{tabular}{l} Vision for machine type communication in 6G. \\ \end{tabular} & ✓ & ✓ & ✓ & & ✓ & \\ \hline
[69] &
\begin{tabular}{l} Vision for machine type communication in 6G. \\ \end{tabular} & ✓ & ✓ & ✓ & & ✓ & \\ \hline
[70] &
\begin{tabular}{l} ML, QC, and QMI identify their \\ potential benefits, issues in the \\ B5G networks. \\ \end{tabular} & ✓ & ✓ & ✓ & & & ✓ \\ \hline
[49] &
\begin{tabular}{l} 6G challenges, requirements, and trends. \\ \end{tabular} & ✓ & ✓ & ✓ & & & ✓ \\ \hline
[78] &
\begin{tabular}{l} Applying TL to future 6G communications. \\ \end{tabular} & ✓ & ✓ & ✓ & & ✓ & ✓ \\ \hline
[51] &
\begin{tabular}{l} Evolution of KPIs and technology trends towards 6G. \\ \end{tabular} & & & ✓ & & ✓ & \\ \hline \hline \end{tabular}
\end{table} 
Table 1: _Cont._The first group--security approaches The review and survey articles look into the framework or platform model that will be developed based on the security approaches.