# Communication Fault Maintenance Decision of Information System Based on Inverse Symmetry Algorithm
## 3 Experimental Analysis
### Effectiveness of Fault Maintenance Decision Methods  
In order to further test the effectiveness of the communication fault maintenance decision-making method of the information system, this method is compared with the binary decision diagram method and the fault tree analysis method, and the comparison of the information system communication situation using the three methods is made. The performance of this method is tested by the average accuracy of data transmission and communication delay of the three methods under different operating distances, and the comparison results are shown in Figures 6 and 7. \begin{table}
\begin{tabular}{c c c c} \hline \hline
**Serial Number** & **Fault Name** & **Approach** &
\begin{tabular}{c} **Maintenance** \\ **Decision Result** \\ \end{tabular} \\ \hline
1 & Electricity failure & Replace the power supply &
\begin{tabular}{c} Fault repair \\ succeeded \\ \end{tabular} \\ \hline
2 & Interface module failure & \
\begin{tabular}{c} Replace the communication \\ interface module \\ \end{tabular} &
\begin{tabular}{c} Fault repair \\ succeeded \\ \end{tabular} \\ \hline
3 & Module software failure & \
\begin{tabular}{c} Check communication parameters and \\ configuration and re-run \\ \end{tabular} &
\begin{tabular}{c} Fault repair \\ succeeded \\ \end{tabular} \\ \hline
4 & \begin{tabular}{c} Cable communication \\ loop failure \\ \end{tabular} & \
\begin{tabular}{c} Check system bus polarity, wiring, \\ terminating resistors, grounding, and \\ cable shorts \\ \end{tabular} &
\begin{tabular}{c} Fault repair \\ succeeded \\ \end{tabular} \\ \hline
5 & \
\begin{tabular}{c} Communication rate is \\ too high \\ \end{tabular} &
\begin{tabular}{c} Reduce communication rate \\ succeeded \\ \end{tabular} \\ \hline
6 & \begin{tabular}{c} Individual site \\ communication failure \\ \end{tabular} & \
\begin{tabular}{c} Configure the communication system \\ software to restart after downloading \\ \end{tabular} &
\begin{tabular}{c} Fault repair \\ succeeded \\ \end{tabular} \\ \hline
7 & More bus nodes & \
\begin{tabular}{c} Divide the network into network 1 and \\ network 2 \\ \end{tabular} &
\begin{tabular}{c} Fault repair \\ succeeded \\ \end{tabular} \\ \hline
8 & \
\begin{tabular}{c} Power output without \\ voltage \\ \end{tabular} & Poor cable contact, replace cable &
\begin{tabular}{c} Fault repair \\ succeeded \\ \end{tabular} \\ \hline
9 & Power indicator blinks & Adjusting the area voltage &
\begin{tabular}{c} Fault repair \\ succeeded \\ \end{tabular} \\ \hline
10 & Power jump to bypass & Remove part of the load &
\begin{tabular}{c} Fault repair \\ succeeded \\ \end{tabular} \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Communication fault repair decision. The experimental results in Figure 6 show that the average accuracy of data transmission of the information system using this method to maintain the communication failure decision-making is more than 99.5% under different operating distances, while the average accuracy of data transmission of the information systems using the binary decision diagram method and fault tree analysis method is only 98.5% under different operating distances. The experimental results show that the information system using this method to maintain the communication failure has better communication performance. The experimental results in Figure 7 show that the data transmission delay of the information system using this method to maintain the communication failure decision-making is less than 50 ms under different action distances, while the data transmission delay of the information systems using the binary decision diagram method and the fault tree analysis method under different action distances is at least 78 ms and 80 ms, and the data transmission delay is an important index to evaluate the performance of the information system. The results show that the information system using this method to maintain the communication failure decision-making has better data transmission performance.