Section: 4.2.3 Common architecture – service based interface
Content: The following figures provide an overview of the logical ubiquitous charging architecture and the information flows for converged offline and online charging in service based interface variant for 5G systems and Edge Computing enabling sub-systems. Figure 4.2.3.1 provides the overview in service based representation: Figure 4.2.3.1: Logical ubiquitous charging architecture and information flows for 5G systems – service based representation Figure 4.2.3.2 provides the overview in reference point representation: Figure 4.2.3.2: Logical ubiquitous charging architecture and information flows for 5G systems – reference point representation The reference points are defined in clause 4.4.3. For the sake of simplicity, the SMF+PGW-C is not explicitly added in Figure 4.2.3.1 and Figure 4.2.3.2, and is represented by the SMF. The SMF+PGW-C uses Nchf for 5GS and EPC interworking as well as when enhanced to support GERAN/UTRAN. The Nchf_SpendingLimitControl service exposed by CHF and consumed by the PCF is specified in TS 23.502[ Procedures for the 5G System (5GS) ]  [214].