Patent ID: 8150366

Claim:
A mobile terminal that performs a normal communication between the mobile terminal and a normal communication terminal via a first call control apparatus, and an emergency-communication between the mobile terminal and an emergency-communication terminal via a second call control apparatus, in an IP network including the first call control apparatus and the second call control apparatus, the mobile terminal comprising: an emergency-communication session establishment processing unit configured to perform an emergency-communication session establishment process between the mobile terminal and the emergency-communication terminal, without performing an emergency-communication location registration process for the mobile terminal in the second call control apparatus, when a normal-communication location registration process for the mobile terminal is completed in the first call control apparatus, and when it is determined that not both of the normal-communication for the mobile terminal and emergency-communication location registration process for the mobile terminal need to be performed in order to perform the emergency-communication in the IP network, wherein the emergency-communication session establishment processing unit is configured to perform the determination based on information notified from the IP network in performing the normal-communication location registration process for the IP network.