Radio communication system and radio communication method

A radio communication system, comprising:

• user equipment;
• a call control device that processes a signal used for call control;
• a subscriber management device that manages subscriber information;
• and
• a connection device that establishes a connection with an application server,
• wherein the subscriber management device includes a subscriber information storage unit that stores subscriber information that associates a first identifier for identifying the user equipment in the radio communication system with a second identifier for identifying the user equipment in the application server,
• wherein the call control device includes
• a first context storage unit that stores first context information and
• a first communication processing unit that acquires the second identifier corresponding to the first identifier received from the user equipment from the subscriber management device, causes the first identifier received from the user equipment and the second identifier acquired from the subscriber management device to be associated and stored in the first context information, and transmits the first identifier received from the user equipment, the second identifier acquired from the subscriber management device, and a call control device identifier for identifying the call control device to the connection device, and
• wherein the connection device includes
• a second context storage unit that stores second context information that associates the first identifier, the second identifier, and the call control device identifier received from the call control device, and
• a second communication processing unit that reports, to the application server, that the second identifier is activated.