ROAMING SYSTEM FOR REDUCTION OF ROAMING CHARGE AND ROAMING CONTROL METHOD FOR REDUCTION OF ROAMING CHARGE

摘要

PURPOSE: A roaming system for reduction of roaming charge and a roaming control method for reduction of roaming charge are provided to reduce the expensive roaming calling charge. CONSTITUTION: A call signal requesting the roaming incoming call to the predetermined incoming terminal equipment(20) of the national is received from the predetermined sending terminal device(10) locating in the outside mobile communication service network(100). The roaming incoming call message in which the roaming gateway system(400) includes the connection information of the sending terminal device and connection information of the incoming terminal equipment is offered. The roaming call relay system(500) requests incoming to the sending terminal device and incoming terminal equipment based on the information of the roaming incoming call message. According to each answer, the roaming call relay system connects the telephony call between the incoming terminal equipment and the sending terminal device.