SIP-based warning system in [20] is an automatic warning
system to send warning signal from event detector, such as
civilian camera to emergency response teams. We extended it
in three different directions. Warning signals of incoming
direction to Control Center System team are extended to
community reporting services while outgoing direction
destines to emergency response units. REGISTER,
SUBSRIBE, and NOTIFY methods are major SIP methods
using in our model as shown in Figure 1. Emergency units
must subscribe their existing information when they are on
duty. Control Center System will notify relevant emergency
units when a crisis occurs.