# Experimental Study on LTE Mobile Network Performance Parameters for Controlled Drone Flights
## 5 Evaluation and Analysis of Measured Results
### Rsrp  
RSRP is the power of the connection between the node on the BTS and UE. It also is essential in assessing the performance of the network but is already visible in the RSRQ equation, so RSRQ is a more inclusive parameter when it comes to network performance. Just like for RSRQ, data analysis was conducted for RSRP around its threshold value of \(-100\) dBm. Three categories were selected with RSRP values between \(-95\) and \(-100\) dBm, \(-100\) and \(-105\) dBm, and \(-105\) and \(-110\) dBm. The results are shown below in Table 6. Percentages of values above the threshold are market in range: 95-100% (dark green); 94-85% (green); 84-75% (beige); \(<\)74% (pinkish).  
As visible in Table 6, the network parameter values in the category of \(-95\) to \(-100\) dBm performed well but lower than that, the other parameters start dropping in value. It is very important to mention that during the flight, RSRP rarely falls below \(-100\) dBm as handover procedures between base stations usually occur before that. This means that the dataset of RSRP values below \(-100\) dBm is very small. This is the main reason why, in Table 6, the values of RSRQ and SINR adjacent to RSRP of \(-100\) to \(-105\) dBm seem relatively low. The conjunction between RSRP and RSRQ in the range of \(-100\) to \(-105\) dB is shown in Figure 8.  
As shown in the graphs (Figure 8), the measured RSRQ values are overwhelmingly below KPI at lower RSRP falling below 10% at all heights besides 40 m. This is due to the size of the dataset and the fact that signal power is one of the main variables both in RSRQ and SINR calculation. Figure 9, below, shows the conjunction between RSRP and SINR in the RSRP range of \(-100\) to \(-105\) dB.  
\begin{table}
\begin{tabular}{c c c c c c c c c c c c c c c c c c c c c c} \hline \hline \multicolumn{1}{c}{**RSRP**} & \multicolumn{1}{c}{**RSRP**} & \multicolumn{1}{c}{**SINR, \%**} & \multicolumn{1}{c}{**Downlink, \%**} & \multicolumn{1}{c}{**Uplink, \%**} & \multicolumn{1}{c}{**Ping \%**} \\ \multicolumn{1}{c}{**Range, dBm**} & \multicolumn{1}{c}{**RSRQ, \%**} & \multicolumn{1}{c}{**SINR, \%**} & \multicolumn{1}{c}{**Downlink, \%**} & \multicolumn{1}{c}{**Uplink, \%**} & \multicolumn{1}{c}{**Ping \%**} \\ \hline  & **40** & **60** & **90** & **110** & **40** & **60** & **90** & **110** & **40** & **60** & **90** & **110** & **40** & **60** & **90** & **110** & **40** & **60** & **90** & **110** \\ \hline \(-95\)\({  
Figure 9 shows that SINR values drop substantially below KPI when measuring at lower RSRP ranges. This is also shown in Table 6 above. As mentioned before, this is because of the key role of signal power in determining SINR.  
Figure 8: The conjunction between RSRP and RSRQ at RSRP range (\(-100\) to \(-105\) dBm) at (**A**) 40 m, (**B**) 60 m, (**C**) 90 m and (**D**) 110 m height.  
Figure 9: The conjunction between RSRP and SINR at RSRP range (\(-100\) to \(-105\) dB) at (**A**) 40 m, (**B**) 60 m, (**C**) 90 m, and (**D**) 110 m height.  
In Figure 10, it is visible that RSRP rarely falls below the threshold, and so there is limited data in this value range, resulting in the poor RSRQ and SINR values visible in Table 6.