The MME 100 performs traffic control relating to user data transferred as control data transmitted from the UE 60 to the AS 130, by using at least one of a quota, rate control, and a charging policy relating to the UE 60. User data transferred as control data targeted for traffic control may be, for example, IoT data, small data, or the like. Note that, when receiving a tariff, the MME 100 may perform traffic control in consideration of the tariff.

The MME 100 may perform traffic control relating to user data being transferred as control data transmitted from the UE 60, and being transferred as control data addressed to the AS 130. Further, the SCEF 110 may perform traffic control relating to user data being transferred as control data transmitted from the AS 130, and being transferred as control data addressed to the UE 60. In other words, the MME 100 may perform traffic control in relation to uplink data, and the SCEF 110 may perform traffic control in relation to downlink data. Thus, traffic or a data amount transferred in a core network can be reduced. Moreover, CP parameter relating to uplink data, and CP parameter relating to downlink data may be set to differing values. Thus, traffic control suited to each of uplink data and downlink data can be performed.