## 5 Implementation and Results
### Discussion  
We derive predicted results such as the improvement of the CPU transfer rate through the sensor clustering, user satisfaction, and extinguishment and evacuation time comparison between the proposed system and the existing system. The existing system is operated through the Building Automation System (BAS) based sprinkler, alarm, and evacuation speaker guide system. When heat was detected through a fire or a heat detector, water was sprayed through the sprinkler and the alarm was informed. In addition, the building manager was to report to the safety center when the fire was detected. But the proposed system is operated through the context aware based fire situation detection by the sensor clustering and controls the actuator according to the fire situation. In particular, our system is based on the LTE network and immediately informs the fire situation to the manager and safety center. In addition, rapid and accurate rescue is possible through AR based real-time monitoring and guidance system. Figure 19 shows the system diagram of the existing system and the proposed system. And Table 10 shows the connection formation for each step of the existing and proposed system. In Table 10, the existing system consists of six steps, from the occurrence of the fire to the extinguishment and evacuation. However, the proposed system transmits the fire information based on the long term evolution (LTE) network, the fire situation is communicated to the manager and safety center simultaneously. And since the gateway transmits the fire information to the users through the LTE network directly without going through the server, it is possible to transmit the fire information quickly. As Figure 20, the existing system transmits the information through the 1:1 structure of the sensor with the server. However, the proposed system transmits the information through the sensor clustering based 1:n structure, and it can be predicted that the proposed system is more efficiency of the CPU performance. The Table 11 is the analysis of the difference between the existing system and the proposed system. \begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multicolumn{2}{c}{**Classification**} & \multicolumn{1}{c}{**Step 1**} & \multicolumn{1}{c}{**Step 2**} & \multicolumn{1}{c}{**Step 3**} & \multicolumn{1}{c}{**Step 4**} & \multicolumn{1}{c}{**Step 5**} & \multicolumn{1}{c}{**Step 6**} \\ \hline \multirow{2}{*}{Existing system} & Connection & \multirow{2}{*}{Sensor-Gateway} & \multirow{2}{*}{Gateway-Server} & Server-Monitoring System & Monitoring & Manager-Safety & Safety \\  & form & & & System & System-Manager & Center & Center-Rescue \\ \hline \multirow{3}{*}{Proposed system} & Connection & \multirow{3}{*}{Sensor-Gateway} & \multirow{3}{*}{Moger} & WEB-Occupant & - & - & - \\ \cline{3-5}  & form & & & & WEB-Manager & - & - \\ \cline{3-5}  & & & & WEB-Safety & Safety & & \\ \cline{3-5}  & & & & Center & Center-Rescue & & \\ \hline \hline \end{tabular}
\end{table} 
Table 10: Connection form of each step. Figure 18: System operation for rescuer. Figure 19: Diagram of the existing system and proposed system: (**a**) The Diagram of Existing System; (**b**) The Diagram of Proposed System. Figure 20: The CPU control signal about the sensor to server connection (**a**: The number of control signals, x: number of sensors, i: number of the sensor clustering): (**a**) Existing System; (**b**) Propose System. As shown in Figure 21, we derived the results about the CPU processing, user satisfaction, and extinguishment and evacuation time. User satisfaction is derived based on the Software Adequacy, Software maintenance, Information accuracy, Ease of use, Timeliness, Security and Integrity as shown in [20]. In the \"CPU processing speed\", and \"Ease of use\" aspect, and user satisfaction is expected to be higher than the existing system as shown in Table 11. Also the total extinguishment and evacuation time is derived that the proposed system is more rapid than the existing system as mentioned above.