Content for  TS 32.277  Word version:  17.4.0

The 5G ProSe converged charging architecture in service-based representation can be achieved under the alternatives:

• ProSe converged charging architecture (CTF), depicted in Figure 4.4.1.
• ProSe converged charging architecture when using PC5 (Distributed CTF), depicted in Figure 4.4.2.
• ProSe converged charging architecture (CEF), depicted in Figure 4.4.3.
• ProSe converged charging architecture in reference point representation for non-roaming, depicted in Figure 4.4.4.

Details on the interfaces and functions can be found in TS 32.240 for the general architecture components. Ga is described in clause 5.4.4 and Bx in clause 5.4.5 of this document, and Nchf is described in TS 32.290. For the 5G ProSe Direct Discovery and 5G ProSe Direct Communication Service over PC5, the CTF is divided into two functional blocks as described in Annex D of TS 32.240. The Accounting Metrics Collection (AMC) function block is in the UE. The AMC sends usage information collected to the Accounting Data Forwarding (ADF) function block of the CTF in the 5G DDNMF over the PC3a reference point defined in TS 23.304. The subset of PC3a specific to usage information collection for charging purposes is denoted as PC3ach in Figure 4.2.2.

Figure 4.4.4 depicts the 5G ProSe converged charging architecture in reference point representation for non-roaming: