Table 3.

Performance analysis of proposed scheme.

	Phase	Emergency Signal Sending Phase	Secure Ambulance Communication Phase
Role
$\mathrm{Patient} {\mathit{Pa}}_i$		$T_h=0.006\mathrm{ms}$	N/A
$\mathrm{Smart} \mathrm{lamp} {\mathit{SL}}_j$		${2T}_h=0.012\mathrm{ms}$	${3T}_{\mathit{ch}}{+6T}_h=\left(0.756+0.036\right) \mathrm{ms}=0.792 \mathrm{ms}$
Server of medical institute MS		${7T}_{\mathit{ch}}{+6T}_h=\left(0.036+1.764\right) \mathrm{ms}=1.8 \mathrm{ms}$	N/A
$\mathrm{Ambulance} A_{\mathit{ij}}$		N/A	${3T}_{\mathit{ch}}{+3T}_h=\left(0.756+0.018\right) \mathrm{ms}=0.774 \mathrm{ms}$
Total		${7T}_{\mathit{ch}}{+9T}_h=\left(0.054+1.764\right) \mathrm{ms}=1.818 \mathrm{ms}$	${6T}_{\mathit{ch}}{+9T}_h=\left(1.512+0.054\right) \mathrm{ms}=1.566 \mathrm{ms}$