## 5 Wireless Technologies Roadmap and Future Trends for MG
### MGMS Communication Standard Development  
The development of relevant standards introduced in Section 3 is a prerequisite to meet wireless technologies in MGMS. For instance, WirelessHART in [68] was noticed facilitating IEC 61850 in the distributed generation sector. A communication stack of IEC 61850, which is the OSI model, is changed and information model and exchange mapped to the wirelessHART protocol. However, it could not meet time limitation requirements of the standard, and the authors referred to solving this weak point to future work. This practice shows that since the most serving MGMS communication standard is IEC 61850, the communication stack of this standard should consider technology developments of wireless communication concerning their coordination with new trends in MGMS.  
\begin{table}
\begin{tabular}{p{56.9 pt} p{56.9 pt} p{56.9 pt} p{56.9 pt} p{56.9 pt} p{56.9 pt} p{56.9 pt}} \hline \hline
**Classification** & **Ref** & **Wireless Technology** & **Standard/Protocol** & **Qualification** & **Tools** & **Objectives** \\  & & & **Deployment** & & & \\ \hline \multirow{9}{*}{Standard-based} & [\(\mu\)] & WLAN & IEC 6480 & ✓/COOSE messages performance, time delay and throughput between DAS and DER & & & \(\mathcal{L}\)C\#ISO-based distribution \\  & [\(\mu\)] & WirelessHART & IEC 6480 & - & & & \\ \cline{3-6}  & [\(\mu\)] & WiFi IEEE & IEC 64850 & ✓ & ✓/Looney, Availability, Time synchronization accuracy, Reliability & Real test & ✓/Automaticity of MC using heterogeneous communication \\  & [\(\mu\)] & WiFi IEEE & 80211.1/a & IEC 64850 & ✓/Looney delay in burst background Traffic & & \\ \cline{3-6}  & [\(\mu\)] & WiFi IEEE & 80211.1/a & IEC 64850 & ✓/Looney delay & & \\ \cline{3-6}  & & WiFi IEEE & 80211.1/a & ✓/Packet loss per second & & & \\ \cline{3-6}  & & WMAs & 8021.16 & & & \\ \hline \multirow{9}{*}{Controll-based} & [\(\mu\)] & Cellular Network & - & ✓/Data rates, ranges, and capacity of the cognitive radio & & ✓/Data service energy energy energy by wireless access to AMI \\  & [\(\mu\)] & WMAs & - & ✓/Enter error rate & MATLAB & & \\ \cline{3-6}  & [\(\mu\)] & Wireless community & - & ✓/Impact of the time-varying wireless communication delay on the performance of distributed power inverters & & \\ \cline{3-6}  & [\(\mu\)] & - & - & ✓/Maintains the magnitude of the voltage and frequency within the acceptable links (IN2 53160) & - & ✓/Networks EBS \\ \cline{3-6}  & [\(\mu\)] & IEEE & 8021.21 MAC & - & ✓/AJS-based decentralized MG & NS2 & ✓/Information accuracy for multi-agent coordination \\  & [\(\mu\)] & & & & & \\ \cline{3-6}  & [\(\mu\)] & WiFi, WMAs, Zigglue & - & ✓/Algorithm of content and energy management for MC & & & \\ \cline{3-6}  & [\(\mu\)] & - & - & ✓/Power and control architecture & & \\ \cline{3-6}  & [\(\mu\)] & WiFi & MoMbNs & \multicolumn{3}{l}{Time delay, Transmission error rate, Coverage} & \multicolumn{1}{p{56.9 pt}}{Laboratory Testbed} & \multicolumn{1}{p{56.9 pt}}{Livestock EBS penetration in MC} \\ \hline \multirow{9}{*}{Communication Technology-based} & [\(\mu\)] & Zigglue & - & ✓/Loening required data to be transferred and a suitable coding & PSCAD & \multicolumn{1}{p{56.9 pt}}{(Data management scheme to management scheme to management)} \\  & [\(\mu\)] & LoRaMAN & - & ✓/Line-on-air, duty cycle, and packet delivery ratio & \multicolumn{1}{p{56.9 pt}}{fold test} & \multicolumn{1}{p{56.9 pt}}{(Provision number distribution for P2P)} \\ \cline{3-6}  & [\(\mu\)] & & & & & \\ \cline{3-6}  & [\(\mu\)] & SG & OPC UA & - & & \\ \cline{3-6}  & [\(\mu\)] & & & & & \\ \hline \end{tabular}
\end{table}
Table 6: Classification of wireless-based MG studies.