4.6 Service based interface
32.2403GPPCharging architecture and principlesCharging managementRelease 18Telecommunication managementTS
4.6.1 Nchf
The Nchf interface is a service based interface, which supports interaction between a Charging Trigger Function and the Charging Function.
The services and protocol(s) of this interface are described in TS 32.290 [57] and TS 32.291 [58].