## 3 Results and Discussion
### The New LTE Network  
The methodology proposed in Section 2.9 was applied in our case study. First, the radioelectric coverage for the new LTE network which will take into account the mentioned 16 TETRA sites, as well as the 18 existing sites (34 in total), was calculated (see Figure 6b). It should be noted that the number of 'dark zones' (blue color in Figure 6) is greater for the LTE network than for the TETRA network. Table 4 shows the percentage of radioelectric coverage for each \begin{table}
\begin{tabular}{c c c c c} \hline \hline  & **\% TETRA** & **\% LTE** & **\% LTE** & **\% LTE** \\ \multirow{2}{*}{**Municipal Area**} & **Radioelectric** & **Radioelectric** & **Radioelectric** & **Radioelectric** \\  & **Coverage** & **Coverage** & **Coverage** & **Coverage** \\  & **(16 Sites)** & **(34 Sites)** & **(46 Sites)** & **(Optimized)** \\ \hline Abanilla & 95 & 87 & 87 & 87 \\ Abarán & 97 & 97 & 97 & 96 \\ Aguilas & 89 & 87 & 87 & 87 \\ Albudeite & 100 & 94 & 94 & 94 \\ Alcantarilla & 100 & 100 & 100 & 100 \\ Aledo & 100 & 96 & 98 & 95 \\ Alguazas & 100 & 96 & 96 & 96 \\ Albama & 94 & 97 & 97 & 96 \\ Archena & 100 & 95 & 95 & 95 \\ Beniel & 100 & 100 & 100 & 96 \\ Blanca & 99 & 96 & 96 & 96 \\ Bullas & 96 & 96 & 96 & 96 \\ Calasparra & 96 & 91 & 91 & 91 \\ Campos del Rio & 100 & 98 & 98 & 98 \\ Caravaca & 93 & 79 & 85 & 85 \\ Cartagena & 95 & 90 & 90 & 88 \\ Cehegin & 90 & 85 & 85 & 85 \\ Ceuti & 100 & 93 & 93 & 93 \\ Cieza & 98 & 92 & 92 & 92 \\ Fortuna & 99 & 93 & 93 & 93 \\ Fuente Alamo & 99 & 98 & 98 & 98 \\ Jumilla & 87 & 75 & 92 & 92 \\ Librilla & 94 & 99 & 99 & 99 \\ Lorca & 90 & 78 & 85 & 85 \\ Lorqui & 100 & 97 & 97 & 97 \\ Mazarron & 94 & 89 & 89 & 88 \\ Molina de Segura & 100 & 98 & 98 & 98 \\ Moratalla & 86 & 71 & 85 & 85 \\ Mula & 96 & 91 & 91 & 91 \\ Murcia & 96 & 94 & 94 & 92 \\ Ojos & 98 & 95 & 95 & 94 \\ Pliego & 98 & 95 & 95 & 95 \\ Puerto Lumbreras & 91 & 85 & 94 & 94 \\ Ricote & 98 & 97 & 96 & 95 \\ San Javier & 100 & 99 & 100 & 98 \\ San Pedro del Pinatar & 100 & 100 & 100 & 90 \\ Torre-Pacheco & 98 & 100 & 100 & 99 \\ Las Torres de Cotillas & 100 & 97 & 97 & 97 \\ Totana & 92 & 84 & 88 & 86 \\ Ulea & 100 & 98 & 97 & 96 \\ La Union & 99 & 92 & 92 & 92 \\ Villanueva & 100 & 98 & 98 & 98 \\ Yeda & 90 & 73 & 91 & 91 \\ Santomera & 99 & 94 & 94 & 91 \\ Los Alčázares & 100 & 100 & 100 & 99 \\ Region & 93 & 85 & 91 & 90 \\ \hline \hline \end{tabular}
\end{table} 
Table 4: Percentage of radioelectric coverage in municipal areas. municipal area. The macro scalar quality of 85% for the municipal area is exceeded in the majority of cases, except for six municipal areas (Caravaca, Jumilla, Lorca; Moratalla, Totana and Yecla) out of 45. Furthermore, the percentage of LTE radioelectric coverage for the region is 85% (below the actual macro scalar quality of 90% for the TETRA network). At this point, according to the flow-chart of Figure 5, new sites must be added to improve the radioelectric coverage. With the aid of the GIS, twelve more sites, represented as blue triangles in Figure 3, were found in the detected 'dark zones'. These new sites would have to be constructed with the necessary infrastructure (telecommunication tower, electrical line, stand, etc.). They were chosen because they are accessible by path, and it is easy for them to receive electric power. The new radioelectric coverage was calculated with the total 46 sites (Table 4). Now, the macro scalar quality of service is accomplished for the municipal areas and for the region, 85% and 90%, respectively. The next step was to apply an optimization algorithm to see if the same quality of service could be maintained with fewer sites. As can be observed in Table 4, 39 sites is enough to accomplish the QoS. These results indicate that the number of sites is a factor of 2.4 higher for the LTE network than for the TETRA network if we want to ensure the same macro scalar quality for both systems.