## 4 Simulation Results and Discussions
### Results and Discussions
#### 4.3.3 Evaluation Result of the ASA and the DA-ASA with Different Priority Ratio  
In the third experiment, we examine the effect of changing the slices' priority ratios to give one slice preferential consideration over the others in our proposed DA-ASA and ASA systems. Each slice's virtual resource partition is predefined dynamically based on its priority ratios. In our proposed DA-ASA and ASA systems, the priority ratios of the slices are defined and estimated by the service provider (operator) according to the target revenue and the importance of the slice traffic. The slice's traffic with the higher ratio has the higher priority. We exploit the parameters listed in Tables 9 and 10, expect we consider three cases in which the slices have different priority ratio. Table 11 shows the specified priority ratios of the slices in each case. The \(P_{URLLC}\) ratio is used to determine the level of URLLC priority. The \(P_{eMBB}\) ratio is used to determine the priority level for eMBB. The \(P_{mMTC}\) ratio is used to determine the priority level for mMTC. In fact, the parameter values selected for the priority ratios will play the most significant role in delivering the performance outcomes required by each slice. it a high priority ratio value. Moreover, in the second case, the value of URLLC's priority ratio is reduced to give the eMBB and the mMTC slices a greater chance of obtaining service. Alternately, in the third case, we further decrease the value of URLLC's priority ratio to provide high priority ratio the mMTC slice, giving it precedence over the URLLC and eMBB slices. The status of the performance metrics of each slice depends on the effect of the priority ratio when calculating the ASP (16, 17). Based on the ASP equations shown in Tables 5 and 7 for both systems, when the URLLC priority ratio, \(P_{\textit{URLLC}}\), increases, the ASP value of URLLC traffic decreases while the ASP value of the other slices increases. As the ASP of any slice decreases, the service priority of that slice increases, and hence its performance metrics improve and vice versa. Figure 20 shows the total system utilization of both systems in all cases. The DA-ASA and ASA achieve full system utilization due to similarities in their functions. Figure 21 shows the resource utilization of the network slices in case one. The utilization of URLLC is the highest since it has the highest priority. The eMBB has a medium utilization since it has more priority than mMTC. However, the DA-ASA slightly decreases the utilization of the URLLC and eMBB compared to the ASA in order to increase the priority of mMTC and allocate more resource for it. Despite this decline in URLLC performance in the case of DA-ASA, it remains superior to eMBB and mMTC slices in both systems. Figure 21: Utilization of network slices vs. total offered traffic loads in case 1 (Experiment 3). Figure 20: Total system utilization vs. total offered traffic loads (Experiment 3). Figure 22 shows the resource utilization of the network slices in case two. The utilization of eMBB in the ASA is highest in this case, since it has a 50% priority ratio and consumes a significant number of resources. The \(MTD_{i}\) factor of the ASP equation in the DA-ASA increases the priority of the URLLC and mMTC if their requests are delayed. Therefore, the DA-ASA decreases the utilization of eMBB compared to ASA in order to increase the utilization of the URLLC and mMTC. Figure 23 shows the resource utilization of the network slices in case three. Since mMTC has the highest priority, ASA provides it a highest utilization at the expense of a lower utilization of the URLLC and eMBB. Moreover, The URLLC has a strict delay requirement of 1 ms. Whenever the delay of its request approaches its \(MTD_{i}\) the ASP value decreases, resulting in an increase in its priority. Therefore, the DA-ASA decreases the utilization of mMTC and slightly decreases the utilization of eMBB compared to ASA in order to allocate resources to the URLLC.