Version History 

Definition 

Charging Function (CHF) is defined using the Charging architecture and principles outlined by 3GPP TS32.240 (Ref 1) as the baseline. It is constructed as a set of capabilities to facilitate charging for telecom network connectivity services delivered by the CSP using 5G stand-alone networks (5GC), characterized by, and limited to:

• Interoperability with the 5G Service Based Architecture
• The ability to define and terminate the Nchf interface, via reference points N28 (SMF <-> CHF) and N40 (PCF <-> CHF)
• The ability to register as a CHF with the Network Repository Function (NRF) via the Nnrf API
• Interoperability with Charging Domain components
• Integration and call-flow orchestration between the CHF, Account Balance Management Function (ABMF), and Rating Function (RF) via a supported interface
• Interoperability with the Charging Gateway Function (CGF) via a supported interface, in order to facilitate CDR generation and data flow to downstream Billing Domain (BD) systems
• Commercial Models and purposes
• Direct B2C connectivity 
• Direct B2B connectivity
• Telecom network inbound roaming
• Telecom network outbound roaming

This Right to Use (RTU) grants the licensee the right to use DigitalRoute’s Usage Engine – Private Edition software in accordance with this definition.