## 2 Related Works
\begin{table}
\begin{tabular}{c c c c c c c c c c c c c} \hline \hline \multirow{2}{*}{**Reference**} & **Mobile** & \begin{tabular}{c} **Data** \\ **Vehicle** \\ \end{tabular} & \begin{tabular}{c} **Data** \\ **Communication** \\ **Mode** \\ \end{tabular} & \begin{tabular}{c} **Data Collection** \\ **Methodology** \\ \end{tabular} & \begin{tabular}{c} **Terrain** \\ **Seitability** \\ \end{tabular} & \begin{tabular}{c} **Location Based** \\ **Real Time** \\ **Application** \\ \end{tabular} & \begin{tabular}{c} **Number** \\ **of Nodes** \\ **Meapilence** \\ \end{tabular} & \
\begin{tabular}{c} **Cost and** \\ **Maintenance** \\ \end{tabular} & **Scalability** & **Application** &
\begin{tabular}{c} **Data** \\ **Collection** \\ **Complexity** \\ \end{tabular} \\ \hline
[35] & UAV & Periodic driven & \begin{tabular}{c} Clustering and \\ Travelling Salesman \\ Problem \\ \end{tabular} & \
\begin{tabular}{c} Highly and flat \\ terrain \\ \end{tabular} & No & High & High & limited &
\begin{tabular}{c} Certain condition \\ monitoring example, \\ environment, \\ surveillance \\ \end{tabular} & High \\ \hline
[36] & UAV & Periodic driven & zig-zag routing path & Flat terrain & No & High & High & Limited &
\begin{tabular}{c} Smart agriculture \\ **of** event \\ detection and tracking \\ (Object detection) \\ \end{tabular} & Simple \\ \hline
[37] & USV & Event driven & \
\begin{tabular}{c} policy-iteration based \\ path planning \\ \end{tabular} & Flat terrain & Yes & Low & Low & High &
\begin{tabular}{c} Target or event \\ detection and tracking \\ (Object detection) \\ \end{tabular} & High \\ \hline
[38] & UAV & Periodic driven & \begin{tabular}{c} bi-level \\ hybridization-based \\ metaheuristic algorithm \\ \end{tabular} & \begin{tabular}{c} Hilly and flat \\ terrain \\ \end{tabular} & Yes & High & High & Limited & \
\begin{tabular}{c} Forest fire detection \\ **of** UAV \\ \end{tabular} &
\begin{tabular}{c} Continuous \\ visit of UAV \\ \end{tabular} \\ \hline
[39] & UAV & Periodic driven & \begin{tabular}{c} Cluster and \\ Metaheuristic Route \\ Planning Algorithm \\ \end{tabular} & \
\begin{tabular}{c} Hilly and flat \\ terrain \\ \end{tabular} & No & High & High & Limited &
\begin{tabular}{c} Certain condition \\ monitoring \\ \end{tabular} & Complex \\ \hline
[40] & UAV & Periodic driven & \begin{tabular}{c} Voronoi diagram based \\ UAV route \\ determination method \\ \end{tabular} & \
\begin{tabular}{c} Hilly and flat \\ terrain \\ \end{tabular} & No & High & High & Limited &
\begin{tabular}{c} Certain condition \\ monitoring \\ \end{tabular} & Simple \\ \hline
[41] & USV & Periodic driven & \
\begin{tabular}{c} particle swarm \\ optimization (PSO) \\ based path planning \\ algorithm \\ \end{tabular} & Flat terrain & No & High & High & Limited &
\begin{tabular}{c} Water monitoring \\ **of** **UAV** \\ \end{tabular} & Complex \\ \hline
[42] & UAV & Periodic driven & \begin{tabular}{c} K-means clustering \\ strategy \\ \end{tabular} & \
\begin{tabular}{c} Hilly and flat \\ terrain \\ \end{tabular} & No & High & High & Limited &
\begin{tabular}{c} Certain condition \\ monitoring \\ \end{tabular} & Simple \\ \hline
[43] & UAV & \begin{tabular}{c} On-demand or \\ query driven \\ \end{tabular} & \begin{tabular}{c} UAV trajectory \\ optimization using the \\ genetic Algorithm \\ \end{tabular} & \begin{tabular}{c} Hilly and flat \\ terrain \\ \end{tabular} & Yes & High & High & Limited & \begin{tabular}{c} Smart farming \\ **of** **Smar** \\ \end{tabular} & Simple \\ \hline Proposed & \begin{tabular}{c} **USV** \\ **TRT** \\ \end{tabular} & \
\begin{tabular}{c} Event driven \\ **TRT** \\ \end{tabular} &
\begin{tabular}{c} T\(-\)based topology \\ \end{tabular} & Flat terrain & Yes & Low & Low & High & Landmine detection & Simple \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Comparison of existing methodology with the proposed TRT.