The SCEF 110 transmits, to the HSS 120, an NIDD authorization request message in which at least one of the quota, the rate control, and the charging policy is set as a parameter (S14_1). The quota, the rate control, and the charging policy are set in the NIDD configuration request message (S12_1). The NIDD authorization request message may be a set suggested network configuration request message.

The HSS 120 holds, as subscriber data for the UE 60, at least one of a quota, rate control, and a charging policy relating to the UE 60. The HSS 120 transmits an NIDD authorization response message to the SCEF 110 (S15_1). At least one of a quota, rate control, and a charging policy relating to the UE 60 updated by the HSS 120 may be set in the NIDD authorization response message (S15_1). The HSS 120 may set a cause indicating a fact (reject) of being unable to receive at least one or all of the quota, the rate control, and the charging policy set in the NIDD authorization request message (S14_1). The NIDD authorization response message may be a set suggested network configuration response message.

The SCEF 110 transmits an NIDD configuration response message to the AS 130 (S16_1). At least one of the quota, the rate control, and the charging policy relating to the UE 60 updated by the HSS 120 may be set in the NIDD configuration response message (S16_1). The SCEF 110 may set a cause indicating a fact (reject) of being unable to receive at least one or all of the quota, the rate control, and the charging policy set in the NIDD configuration request message (S12_1). The NIDD configuration request message may be a T 8 set suggested network configuration response message.