Scalability and performance in WSNs & simulations and hybrid testbeds, large network size \\ \hline
Sensor node design & Development of sensor nodes, monitoring, measurement, debugging \\ \hline
Interoperability and platform support & Support for different platforms, heterogeneity \\ \hline
-Application and protocol design & Tool support for development,debugging and deployment \\ \hline
+Application and protocol design & Tool support for development, debugging and deployment \\ \hline
\end{tabular}
}
\end{table}