D.4 Network slice charging based on 5G data connectivity scenarios

32.2553GPP5G data connectivity domain chargingCharging managementRelease 17Stage 2Telecommunication managementTS

D.4.1 Basic principles

D.4.1.1 CHF selection

The CHF selection mechanism at PDU session establishment defined in clause 5.1.8 of this specification, allows the SMF to reach the CHF hosted by the Converged Charging system serving the UE belongs to the particular S-NSSAI and Tenant.

D.4.2 Message flows

The message flows in clause 5.2.2 apply. The following figure provides a simplified decription focusing on Network slice usage charging for a S-NSSAI.

Figure D.4.2-1: Network slice charging based on 5G data connectivity

1. The SMF collects the charging information for PDU session.

2. The SMF reports the PDU session information with S-NSSAI.

3. CHF includes S-NSSAI in the CDR for the PDU session.

4. CHF sends the charging data response.