Emergency service model analysis to heterogeneous network environment

In recent years, network communication has been a necessary part in daily life. However, there is a lake of emergency call or emergency process in current network communication environment. In order to overcome such situation, 3GPP proposes emergency communication system in Next Generation Networks, which is a part of service in IP Multimedia Subsystem. The queuing model is used to achieve the performance of emergency service in IMS. Finally, the delay time of our proposed model is analyzed.