Obtaining Threshold Values at SMF
Threshold values, during online charging, are always obtained from the CHF. Whereas the threshold values, during offline charging, are obtained either from the CHF or from the charging profile configuration.
If charging profile is not determined during PDU establishment, the SMF refers to the charging profile from the DNN profile. Once the Charging Profile is determined, the SMF uses the determined Charging Profile to obtain the threshold values for Session/SDF URR.
The configuration has threshold values at a session level or rating-group level. The rating-group level threshold values are generic and not about a rating-group. These threshold values are overwritten by CHF response.
Note | The CHF response has various triggers. If some trigger is available at the session level or rating-group level, and if the volume or time threshold value is unavailable, then these values are assumed to be disabled at the corresponding level. |