Network slice performance and analytics charging is performed by the CEF interacting with CHF using Nchf specified in TS 32.290
and TS 32.291
.In order to provide the data required for the charging management activities outlined in TS 32.240
, the CEF shall be able to perform converged charging for each of the following:
the performance and analytics information obtained from NWDAF.
the performance and analytics information obtained from MnS;
The CEF shall be able to obtain performance and analytics information from the NWDAF and/or MnS as follows:
The Subscribe/Notify are exchanged between the CEF and the NWDAF using the Nnwdaf service. The interactions are issued by the CEF towards the NWDAF when certain conditions are met.
The Subscribe/Notify are exchanged between the CEF and the MnS producer. The interactions are issued by the CEF when certain conditions are met.
The CEF shall be able to perform converged charging by interacting with CHF, for charging data related to network slice performance and analytics. The Charging Data Request and Charging Data Response are exchanged between the CEF and the CHF, based on PEC scenarios specified in TS 32.290
. The Charging Data Request is issued by the CEF towards the CHF when certain conditions (chargeable events) are met.
The charging information is collected per Single Network Slice Selection Assistance Information (S-NSSAI).
The services provided by NWDAF are defined in the TS 23.288
and the services provided by MnS producer are defined in the TS 28.533
. The charging functionalities for network slice performance and analytics, i.e. CEF functionality, charging events and charging procedures, are defined in the following clauses.
Whether performance and analytics charging for an S-NSSAI in the CEF is active or not is based on configuration. Which performance and analytics information is obtained from NWDAF or MnS by the CEF is based on configuration.
The configuration may be per S-NSSAI, detailed information about the configuration or provisioning of the configuration is outside the present document.
The contents and purpose of each charging event that triggers interaction with CHF, as well as the chargeable events that trigger them, are described in clauses 5.2.2
A detailed formal description of the converged charging parameters to CHF defined in the present document can be found in TS 32.291
A detailed formal description of the CDR parameters defined in the present document can be found in TS 32.298
Triggers for CEF to invoke a Charging Data Request [Event] towards the CHF are defined as following trigger conditions.
When a charging event is issued towards the CHF, it includes details such as Single Network Slice Selection Assistance Information (S-NSSAI). Table 126.96.36.199-1
summarizes the set of default trigger conditions and their category which shall be supported by the CEF.
The CDR generation mechanism processed by the CHF upon receiving Charging Data Request [Event] issued by the CEF for these chargeable events, is specified in clause 5.2.3