Section: 4.4.3 Charging services Reference point
Content: The common charging architectures are mapped into the specific domain/subsystem/service charging architectures in the respective middle tier TSs, which contain in their reference point representation, the following reference points: N28: Reference point between PCF and CHF defined in TS 23.501[ System architecture for the 5G System (5GS) ] [215]. N40: Reference point between SMF and the CHF in the same PLMN defined in clause 4.2 of TS 32.255[ Telecommunication management; Charging management; 5G data connectivity domain charging; Stage 2 ]  [15]. N41: Reference point between AMF and CHF in HPLMN defined in clause 4.2.2 of TS 32.256[ Charging management; 5G connection and mobility domain charging; Stage 2 ]  [16]. N42: Reference point between AMF and CHF in VPLMN defined in clause 4.2.2 of TS 32.256[ Charging management; 5G connection and mobility domain charging; Stage 2 ]  [16]. N44: Reference point between NEF and CHF defined in clause 4.4 of TS 32.254[ Telecommunication management; Charging management; Exposure function Northbound Application Program Interfaces (APIs) charging ]  [14]. N45: Reference point between IMS Node and CHF defined in clause 4.4 of TS 32.260[ Telecommunication management;Charging management;IP Multimedia Subsystem (IMS) charging ]  [20]. N46: Reference point between SMSF and CHF defined in clause 4.4 of TS 32.274[ Telecommunication management; Charging management; Short Message Service (SMS) charging ]  [34]. N47: Reference point between SMF and the CHF in different PLMNs defined in clause 4.2 of TS 32.255[ Telecommunication management; Charging management; 5G data connectivity domain charging; Stage 2 ]  [15]. N48: Reference point between 5G DDNMF and the CHF in different PLMNs defined in clause 4.4 of TS 32.277[ Telecommunication management; Charging management; Proximity-based Services (ProSe) charging ]  [37]. N49: Reference point between EES and CHF defined in clause 4.2.3 of TS 32.257[ Telecommunication management; Charging management; Edge computing domain charging ]  [17]. N100: Reference point between MMS node and CHF defined in clause 4.4 of TS 32.270[ Telecommunication management; Charging management; Multimedia Messaging Service (MMS) charging ]  [30]. N101: Reference point between MB-SMF and the CHF in the same PLMN defined in clause 4.2 of TS 32.255[ Telecommunication management; Charging management; 5G data connectivity domain charging; Stage 2 ]  [15]. N107: Reference point between two CHFs defined in clause 4.2 of TS 32.255[ Telecommunication management; Charging management; 5G data connectivity domain charging; Stage 2 ]  [15] and clause 4.2.2 of TS 32.256[ Charging management; 5G connection and mobility domain charging; Stage 2 ]  [16]