An object of the present disclosure is to provide a control device, a communication terminal, a control method, and a program which can control, in consideration of a traffic characteristic of an application operating between an application server and the communication terminal, traffic or a data amount transferred on a core network.

A control device according to a first aspect of the present disclosure includes: a communication unit configured to receive, via a service control device which authenticates an application server providing a service to a communication terminal, information relating to a transmittable data amount determined in the application server; and a control unit configured to execute, by using the information relating to the transmittable data amount, traffic control on data transmitted from the communication terminal.

A communication terminal according to a second aspect of the present disclosure includes: a communication unit configured to receive, via a service control device and a control device which authenticate an application server providing a service to the communication terminal, information relating to a transmittable data amount determined in the application server; and a control unit configured to execute, by using the information relating to the transmittable data amount, traffic control on data to be transmitted.

A control method according to a third aspect of the present disclosure includes: receiving, via a service control device which authenticates an application server providing a service to a communication terminal, information relating to a transmittable data amount determined in the application server; and executing, by using the information relating to the transmittable data amount, traffic control on data transmitted from the communication terminal.