# Priority-Driven Resource Allocation with Reuse for Platooning in 5G Vehicular Network
## 5 Results and Analysis
### Simulation Results and Analysis  
(1) Average Allocation Rate (AAR): In Figure 9, the AAR of the proposed algorithm and existing algorithms is compared based on the number of general vehicles and platoons. In Figure 9a-d, the number of general vehicles is set to 30, 40, 50, and 60, respectively. As shown in all the figures, the AAR for each algorithm tends to decrease as the number of platoons increases. The proposed algorithm exhibits less reduction in AAR compared with Max-C/I and the priority-based algorithm, maintaining relatively stable performance for general vehicles. When there is one platoon and 60 general vehicles, the proposed algorithm achieves an AAR of over 90%, while Max-C/I records 58% and the priority-based algorithm records 54%. While the AAR difference between the priority-based algorithm and Max-C/I is minimal, both of the other two reuse algorithms show performance exceeding 90%. This is likely because platoon vehicles consume fewer resources when their number is low. The resource reuse algorithms allow general vehicles to reuse resources, enabling them to maintain a high AAR even under resource constraints. As a result, the reuse  
Figure 8: Simulation frameworks diagram. algorithms outperform Max-C/I and the priority-based algorithm in terms of resource allocation performance for general vehicles. When analyzing the AAR variation as the number of platoons increases, the priority-based reuse algorithm shows a clear downward trend in AAR as the number of platoons rises. For instance, the AAR is 84% with three platoons and drops to 72% with five platoons. In contrast, the proposed algorithm maintains high AARs of 92% and 91%, respectively, with minimal impact from the increasing number of platoons. This is because the proposed algorithm is designed to allocate resources by reusing those from both platoon vehicles and general vehicles while efficiently managing resource reuse in platoon vehicles based on SINR. Consequently, even with an increasing number of platoons, the proposed algorithm sustains a relatively high AAR. This demonstrates that the proposed algorithm can maintain a high resource allocation rate for general vehicles even in scenarios of high resource demand for platoon vehicles. Additionally, as shown in Figure 9a-d, as the number of general vehicles increases, the AAR decreases by approximately 0.4% to 2%. However, the rate of AAR decreases with the increasing number of platoons remains consistent across all figures. The impact of the number of general vehicles on AAR is relatively small compared with the effect of increasing the platoon. This is likely due to structural differences in communication: general vehicles transmit 200-byte packets every 100 ms, while platoon vehicles transmit 400-byte packets every 30 ms, resulting in platoon vehicles consuming more resources. Figure 9: The Average Allocation Rate (AAR) of general vehicle: (**a**)—30 general vehicles, (**b**)—40 general vehicles, (**c**)—50 general vehicles, (**d**)—60 general vehicles. Since the priority-based algorithm favors resource allocation to platoon vehicles, an increase in the number of platoons leads to a relative decrease in resource allocation for general vehicles. On the other hand, the increase in the number of general vehicles does not significantly affect the resource allocation order in the priority-based algorithm, resulting in a minimal impact on the AAR of general vehicles. Finally, the proposed algorithm shows relatively minimal performance degradation as the number of general vehicles increases, with the AAR decreasing by less than 1% between 30 and 60 vehicles. This is likely because the proposed algorithm allows general vehicles to reuse platoon vehicle resources under SINR conditions, enabling more efficient resource allocation. (2) Delay of general vehicles: Figure 10 shows the average delay of the proposed algorithm and existing algorithms as the number of platoon increases from 1 to 5 in a congested environment with 60 general vehicles.