# IoT for Smart Cities: Machine Learning Approaches in Smart Healthcare--A Review
## 3 Wireless Sensor Networks for Smart Cities
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline \multirow{2}{*}{**Sr.**} & \multirow{2}{*}{**Title**} & \multicolumn{4}{c}{**Covered Areas**} \\ \cline{3-6}  & & **Smart Cities** & **Smart Healthcare** & **AI/ML** & **Security** \\ \hline \multirow{2}{*}{7} & An architecture for smart health monitoring system & \multirow{2}{*}{N} & \multirow{2}{*}{Y} & \multirow{2}{*}{Y} & \multirow{2}{*}{N} \\  & based on fog computing [13] & & & & \\ \hline \multirow{3}{*}{8} & Deep Learning for Multigrade Brain Tumor & \multirow{3}{*}{N} & \multirow{3}{*}{Y} & \multirow{3}{*}{Y} & \multirow{3}{*}{N} \\  & Classification in Smart Healthcare Systems: A & & & & \\ \cline{1-1}  & Prospective Survey [14] & & & & \\ \hline \multirow{2}{*}{9} & Artificial Intelligence enabled IoT: Traffic congestion & \multirow{2}{*}{Y} & \multirow{2}{*}{N} & \multirow{2}{*}{Y} & \multirow{2}{*}{N} \\  & reduction in smart cities. [15] & & & & \\ \hline \multirow{2}{*}{10} & On big data, artificial intelligence and smart cities. [16] & & & & \\ \hline \multirow{2}{*}{11} & Blockchain for IoT-based smart cities: Recent & \multirow{2}{*}{Y} & \multirow{2}{*}{N} & \multirow{2}{*}{N} & \multirow{2}{*}{Y} \\  & advances, requirements, and future challenges. [17] & & & & \\ \hline \multirow{2}{*}{12} & Urban artificial intelligence: From automation to & \multirow{2}{*}{Y} & \multirow{2}{*}{N} & \multirow{2}{*}{Y} & \multirow{2}{*}{N} \\  & autonomy in the smart city. [18] & & & & \\ \hline \multirow{2}{*}{13} & Applications of artificial intelligence and machine & \multirow{2}{*}{Y} & \multirow{2}{*}{N} & \multirow{2}{*}{Y} & \multirow{2}{*}{N} \\  & learning in smart cities [19] & & & & \\ \hline \multirow{2}{*}{14} & Mitigating and monitoring smart city using internet of & \multirow{2}{*}{Y} & \multirow{2}{*}{N} & \multirow{2}{*}{N} & \multirow{2}{*}{N} \\  & things [20] & & & & \\ \hline \multirow{2}{*}{15} & Machine learning based distributed big data analysis & \multirow{2}{*}{Y} & \multirow{2}{*}{N} & \multirow{2}{*}{Y} & \multirow{2}{*}{N} \\  & framework for next generation web in IoT [21] & & & & \\ \hline \multirow{2}{*}{16} & DeepBlockScheme: A Deep Learning-Based & \multirow{2}{*}{Y} & \multirow{2}{*}{N} & \multirow{2}{*}{Y} & \multirow{2}{*}{Y} \\  & Blockchain Driven Scheme for Secure Smart City. [22] & & & & \\ \hline \multirow{2}{*}{17} & Energy efficiency in internet of things: An overview & \multirow{2}{*}{N} & \multirow{2}{*}{N} & \multirow{2}{*}{N} & \multirow{2}{*}{Y} \\  & [23] & & & & \\ \hline \multirow{2}{*}{18} & OTS Scheme Based Secure Architecture for & \multirow{2}{*}{Y} & \multirow{2}{*}{Y} & \multirow{2}{*}{N} & \multirow{2}{*}{Y} \\  & Energy-Efficient IoT in Edge Infrastructure [24] & & & & \\ \hline \hline \end{tabular}
\end{table} 
Table 1: _Cont._Through the interaction of individual or many sensor nodes that communicate via radio, large network structures can be set up that allow extensive observation and monitoring of various phenomena. Measurements can be carried out at high frequency and with great accuracy without disturbing or influencing the processes to be observed. All the sensor data are forwarded to the base station and the control of the network is organized via wireless communication. Both data types are cascaded or protocol-controlled from and to the control point, the gateway, transmitted through the network and forwarded from there to the control unit (query system/server). The main advantages of many modern wireless sensor networks are their ad-hoc and multi-hop capabilities, autonomous intelligent operation, ability to fuse sensors, bidirectional communication, good value for money, energy efficiency and self-healing capabilities [27]. Wireless sensor networks work transparently, i.e., they offer a platform for the transmission of any measurement data without knowing its meaning. The sensing modules for wireless sensor networks have a strictly modular structure and provide various open interfaces for connecting digital and analog sensors.