G.3 Reference points and Reference model

29.2123GPPPolicy and Charging Control (PCC)Reference pointsRelease 17TS

G.3.1 Reference architecture

G.3.1.1 General

For Fixed Broadband Access network convergence, the reference architecture in Figure G.3.1.2.1 and Figure G.3.1.3.1 applies with the following conditions:

– PCEF resides in the IP Edge in the Fixed Broadband Access network.

NOTE 1: Either SPR or UDR is used in this architecture.

NOTE 2: Gxx reference point is not used.

G.3.1.2 Reference architecture

Figure G.3.1.2.1: PCC Reference architecture for Fixed Broadband Access network convergence when SPR is used

Figure G.3.1.2.2: PCC Reference architecture for Fixed Broadband Access network convergence when UDR is used

G.3.2 Gx Reference Point

This reference point corresponds to the Gx which resides between the PCEF in the IP Edge and the PCRF. The Gx reference point provides the same functionality as the Gx described in clause 4 with the following exceptions:

– No provisioning of IP flow mobility routing information from the PCEF in the IP Edge to the PCRF is performed.

– Negotiation of Bearer Control Mode (UE-only or UE/NW) does not apply.

In addition, for the purpose of convergence between 3GPP access and Fixed Broadband Access Network, the Gx reference point enables the transfer of PCC rules for an IP-CAN session that exists in the PCEF for a fixed device or for a 3GPP UE.

G.3.3 Sd Reference Point

The Sd reference point as described in clause 4b applies with the exception that the TDF does not request any notifications of specific events from the PCRF.