An IoT terminal is expected to rapidly increase in the future. Thus, a mobile network is required to efficiently transfer data relating to an IoT terminal, and further avoid generation of congestion or the like. Non Patent Literature 1 discloses that an application server transmits, to a service capability exposure function (SCEF) entity (hereinafter, referred to as an SCEF), information relating to a threshold value of a data amount predetermined for each communication terminal equivalent to an IoT terminal. Moreover, Non Patent Literature 1 discloses that the SCEF performs traffic control, based on a threshold value. Traffic control may be, for example, refusing to transfer data exceeding the threshold value.