# Evaluation of Radio Access Protocols for V2X in 6G Scenario-Based Models
## 4 Analysis of Performance Results
### Theoretical Mathematical Model Results
#### 4.1.2 L and DR for LTE-V2X and NR-V2X Protocols  
Table 6 shows the results for the LTE-V2X protocol with the following configuration: various MCS options, 1500 bytes payload, an SCS of 15 kHz, and channel bandwidths of 10 MHz and 20 MHz. Comparing results plotted in Table 6 against those of Table 5, it is observed that LTE-V2X outperforms the IEEE protocols in terms of performance, both in L and DR, due to the use of a lower SCS, specifically 15 kHz. This table also shows that with a higher channel bandwidth, namely 20 MHz, the values of the metrics analyzed are even better, since a higher data transmission capacity is obtained. Table 7 shows the results performed for the NR-V2X protocol with the following configuration: various MCS options, a payload of 1500 bytes, an SCS of 15 kHz and a channel bandwidth of 10 MHz and 20 MHz. As can be viewed, when the MCS options increase, the DR is also increased. Moreover, and as expected, the performance of the NR-V2X (Table 7) overcomes that obtained with LTE-V2X (Table 6). For example, for the MCS27 (64-QAM) of NR-V2X, the data rate is 121.14 Mbps, while for the MCS27 (64-QAM) of LTE-V2X, it is only 102.32 Mbps. Figure 2: Comparison for DR (**A**) and L (**B**) between 802.11p and 802.11 bd protocols. \begin{table}
\begin{tabular}{c c c c c c c c c c c c c c c c} \hline \multirow{2}{*}{**MCS**} & \multirow{2}{*}{**M**} & \multirow{2}{*}{**CR**} & \multicolumn{2}{c}{\(L^{\text{2 MMH}}_{\text{cm}}\)} & \(L^{\text{2 MMH}}_{\text{cm}}\) & \(DR^{\text{2 MMH}}_{\text{cm}}\) & \(DR^{\text{2 MMH}}_{\text{cm}}\) & \(DR^{\text{2 MMH}}_{\text{cm}}\) & \(n_{\text{mm}}\) & \(n_{\text{mm}}\) & \(n_{\text{mm}}\) & \(n_{\text{mm}}\) & \(n_{\text{mm}}\) & \(n_{\text{mm}}\) & \(n_{\text{mm}}\) & \(n_{\text{mm}}\) & \(n_{\text{mm}}\) & \(n_{\text{mm}}\) & \(n_{\text{mm}}\) & \(n_{\text{mm}}\) & \(n_{\text{mm}}\) \\ \hline
0 & QPSK & 0.13 & 2 & 1 & 8.90 & 17.67 & 3112 & 110 & 9 & 12 & 2 & 816 & 1620 & 10 & 1 \\ \hline
2 & QPSK & 0.20 & 2 & 1 & 8.90 & 17.67 & 4968 & 110 & 9 & 12 & 2 & 816 & 1620 & 10 & 1 \\ \hline
5 & QPSK & 0.40 & 2 & 1 & 8.90 & 17.67 & 9258 & 110 & 9 & 12 & 2 & 816 & 1620 & 10 & 1 \\ \hline
7 & QPSK & 0.57 & 2 & 1 & 9.89 & 19.64 & 12,216 & 99 & 9 & 12 & 2 & 816 & 1620 & 10 & 1 \\ \hline
11 & 16-QAM & 0.47 & 1 & 1 & 16.32 & 32.40 & 12,216 & 60 & 9 & 12 & 4 & 816 & 1620 & 10 & 1 \\ \hline
13 & 16-QAM & 0.60 & 1 & 1 & 20.83 & 41.36 & 12,216 & 47 & 9 & 12 & 4 & 816 & 1620 & 10 & 1 \\ \hline
16 & 16-QAM & 0.76 & 1 & 1 & 26.46 & 52.54 & 12,216 & 37 & 9 & 12 & 4 & 816 & 1620 & 10 & 1 \\ \hline
21 & 64-QAM & 0.79 & 1 & 1 & 40.80 & 81.00 & 12,216 & 24 & 9 & 12 & 6 & 816 & 1620 & 10 & 1 \\ \hline
24 & 64-QAM & 0.94 & 1 & 1 & 48.96 & 97.20 & 12,216 & 20 & 9 & 12 & 6 & 816 & 1620 & 10 & 1 \\ \hline
27 & 64-QAM & 1.02 & 1 & 1 & 51.54 & 102.32 & 12,576 & 19 & 9 & 12 & 6 & 816 & 1620 & 10 & 1 \\ \hline \end{tabular}
\end{table} 
Table 6: Various MCS options, payload 1500 bytes, SCS 15 kHz, BW 10 MHz and 20 MHz, L (ms), and DR (Mbps) for LTE-V2X. \begin{table}
\begin{tabular}{c c c c c c c c c c c c c c} \hline \multirow{2}{*}{**MCS**} & \multirow{2}{*}{**M**} & \multirow{2}{*}{**CR**} & \(L^{\text{2 MMH}}_{\text{cm}}\) & \(L^{\text{2 MMH}}_{\text{cm}}\) & \(DR^{\text{2 MMH}}\) & \(DR^{\text{2 MMH}}_{\text{cm}}\) & \(n_{\text{mm}}\)In order to have a point of comparison, Figure 3 compares the performances of the LTE-V2X and NR-V2X protocols for the MCS16 (16-QAM) and MCS27 (64-QAM) modulations. The configuration is as follows: payloads from 1 to 4000 bytes and a channel bandwidth of 10 MHz. As can be seen from Figure 3A, the DR is always higher with the NR-V2X protocol compared to the LTE-V2X protocol for the different modulation schemes. In terms of transmission latency, as shown in Figure 3B, the values obtained with the NR-V2X protocol are always lower when compared to the values in the LTE-V2X protocol for both modulation schemes.