# Mobile Network Operators' Assessment Based on Drive-Test Campaign in Urban Area for iPerf Scenario
## 4 Relationship between QoS Metrics
### Analysis for UDP Results  
For UDP, we considered four QoS parameters, i.e., Th-Rx, Th-Rate, JT, and RDR. From a data analysis perspective, Th-Rx and JT are crucial. For all MNOs, Th-Rx is moderately or strongly correlated with the signal metrics. For UL, the largest PCC (i.e., \(PCC=0.62\)) is obtained for RSRP-5G (Orange and T-Mobile). The PCCs between Th-Rx and RSRP are equal between 0.47 and 0.59 for all MNOs. The correlation between Th-Rx and SINR-5G or SINR is generally weak (i.e., \(0.24<PCC<0.39\)) for all MNOs, but for SINR and Plus, the PCC is equal to 0.47. For DL and three MNOs (i.e., Orange, Play, and T-Mobile), we obtain a higher correlation between Th-Rx and SINR/SINR-5G (i.e., \(0.34<PCC<0.54\)) than between Th-Rx and RSRP/RSRP-5G (i.e., \(0.28<PCC<0.47\)). The correlation degree of signal parameters with JT is weaker than with Th-Rx, which results in a large spreading of data. Due to the specificity of JT measurement as a time indicator, it has a lower limit equal to 0. Therefore, the estimation is subject to a larger error, similar to Th-Rx for TCP, which has an upper limit. PCCs between JT and RSRP are in the range from \(-0.40\) to \(-0.24\) and are relatively the best among the signal metrics (e.g., \(-0.40<PCC<-0.21\) for SINR). Therefore, for UDP, we propose a Th-Rx estimation based on RSRP or SINR for UL and DL, respectively, similarly to TCP. Figures 12 and 13 depict measured Th-Rx versus RSRP or SINR and appropriate regression lines for (a) UL and (b) DL, respectively. Analogous graphs for JT are presented in Figures 14 and 15. Figure 11: Regression lines of RSRP-5G versus SINR-5G for four MNOs, TCP: (a) UL or (b) DL. Figure 14: Measured JT versus (**a**) RSRP for four MNOs, UDP, and UL; or (**b**) SINR for four MNOs, UDP, and DL. Figure 12: Measured Th-Rx versus (**a**) RSRP for four MNOs, UDP, and UL; or (**b**) SINR for four MNOs, UDP, and DL. Figure 13: Regression lines of Th-Rx versus (**a**) RSRP for four MNOs, UDP, and UL; or (**b**) SINR for four MNOs, UDP, and DL. For UDP and Th-Rx, we can draw similar conclusions as for TCP. The regression lines for three MNOs (i.e., Orange, T-Mobile, and Play) have similar slopes and intercept points. Primarily, two lines for Orange and T-Mobile in UL and Play and T-Mobile overlap. Only regression lines for Plus, UL and DL, are significantly different. Similar to TCP, at the same RSRP/SINR level, Plus in UDP has lower or higher throughput than other MNOs for UL and DL, respectively. In the case of JT, regression lines for Orange and T-Mobile overlap for UL and DL. On the other hand, jitter is higher for Play and Plus in UL, and for Play also in DL, respectively. For Plus, JT is lower than Orange/T-Mobile for \(SINR<10\) dB and higher for \(SINR>10\) dB. The results obtained for UDP confirm the two main conclusions formulated for TCP: using RAN sharing technology by Orange and T-Mobile provides similar throughput results, and using the 2.6 GHz band by Plus gives higher throughput for DL. For UDP, we also analyze the relationship between the reference signal parameters representing the received power level and its quality. Measured data and regression lines of RSRP versus SINR and RSRP-5G versus SINR-5G are shown in Figures 16-19, respectively. Figure 16: Measured RSRP versus SINR for four MNOs, UDP: **(a)** UL or **(b)** DL. Figure 15: Regression lines of JT versus (**a**) RSRP for four MNOs, UDP, and UL; or **(b)** SINR for four MNOs, UDP, and DL. Based on the results obtained for UDP, we can draw the same conclusions as for TCP (see Section 4.1, Figures 8-11). It proves that the analysis of the level and quality of the received signal in mobile networks is independent of the provided services but depends on the radio resources (i.e., used frequency band), the location of the UE in relation to the base  
Figure 19: Regression lines of RSRP-5G versus SINR-5G for four MNOs, UDP: (**a**) UL or (**b**) DL. Figure 17: Regression lines of RSRP versus SINR for four MNOs, UDP: (**a**) UL or (**b**) DL.