E.4 Functional Elements

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

E.4.1 PCRF

The PCRF functionality defined in clause 4.4.1, clause 4a.4.1 and clause 4b.4.1 shall apply. In addition, to support interworking with Fixed Broadband Access networks for EPC-routed traffic, the PCRF shall:

– Be able to receive from the PCEF the H(e)NB Local IP address and if available UDP source port number for the H(e)NB scenario when GTP-based S5/S8 is used (case 1).

– Be able to receive from the BBERF(S-GW) the H(e)NB Local IP address and if available UDP source port number, and if available for the H(e)NB scenario when PMIP-based S5/S8 is used (case 2b).

– Be able to receive the UE local IP address, if available, UDP source port number from the BBERF (ePDG) (case 2a and case 2b) and PCEF (case 1) and ePDG IP address or P-GW IP address for the WLAN scenario.

– Be able to receive the HNB local IP address and if available, UDP source port number from HNB GW (case 1) for the HNB CS scenario.

In addition, to support interworking with Fixed Broadband Access networks for NSWO traffic, the PCRF shall:

– Establish an Sd session with the TDF for an S9a* session with the UE local IP address. The TDF address may be received over S9a reference point or can be preprovisioned in the PCRF.

NOTE: Scenarios where non-seamless WLAN offloaded traffic is routed via the TDF are limited to the case where the Fixed Broadband Access Network and the PLMN are owned by the same operator.

– Make the ADC decisions based on information obtained from the BPCF via the S9a reference point.

E.4.2 PCEF

The PCEF functionality defined in clause 4.4.2 shall apply. In addition, to support interworking with Fixed Broadband Access networks, the PCEF shall:

– Support the reporting of the H(e)NB Local IP address and if available UDP source port number over Gx reference point for the H(e)NB scenario when GTP-based S5/S8 is used (case 1).

– Support the reporting of the UE local IP address, if available UDP source port number (case 1) and P-GW IP address over Gx reference point for the WLAN scenario when GTP-based S2b or trusted S2c is used (case 1).

E.4.3 BBERF

For case 2a and case 2b of WLAN scenario, the BBERF(ePDG) shall support the reporting of the UE’s Local IP address, UDP source port number if the NA(P)T is detected and ePDG IP address to the PCRF over Gxx reference point corresponding to Gxb* Bearer Binding, uplink bearer binding verification functions are not supported.

For case 2b of H(e)NB scenario, Gxx reference point corresponds to Gxc and the BBERF(S-GW) functionality defined in clause 4a.4.2 shall apply. In addition, to support interworking with Fixed Broadband Access networks, the BBERF shall support reporting the H(e)NB local IP address and the UDP source port number of IPSec tunnel if the NA(P)T is detected.

E.4.4 HNB GW

To support interworking with Fixed Broadband Access networks, the HNB GW shall:

– Support S15 session establishment, modification and termination between the HNB GW and PCRF for the CS sessions.

– Support the reporting of the QoS information of CS session to the PCRF so as to trigger the PCRF to request allocation of resources in the Fixed Broadband access network.

– Support the reporting of the HNB local IP address and if available UDP source port number.