E.7 BPCF Addressing

29.2133GPPPolicy and charging control signalling flows and Quality of Service (QoS) parameter mappingRelease 17TS

E.7.1 General

For S9a session establishment trigger procedure initiated by the (V-)PCRF, the PCRF (for non-roaming case) and the V-PCRF (for roaming case) is configured with IP address range mappings { (Ipx..Ipy) ‑> BBF network entry point}. The PCRF (for non-roaming) and the V-PCRF (for roaming cases) selects the correct BBF network entry point based on UE Local IP address for WLAN scenario and based on H(e)NB IP address and FQDN if available for H(e)NB case received from the PCEF/BBERF/HNB GW for H(e)NB scenario. The implementation of a BBF network entry point is out-of-scope for 3GPP e.g. be a BPCF or a DRA.

For case 1 and roaming with home routed, for S9 session establishment trigger procedure initiated by the H-PCRF, H-PCRF finds the VPLMN according to the PLMN Id of the visited network in 3GPP-SGSN-MCC-MNC AVP if received at IP-CAN session establishment received over Gx reference point, and then discovers V-PCRF by V-DRA if there are more than one PCRF deployed in the visited network. The H-PCRF sends the H(e)NB Local IP address within HeNB-Local-IP-Address AVP and optionally the FQDN of BBF access network within the HeNB-BBF-FQDN AVP for H(e)NB scenario or the UE local IP address within the UE-Local-IP-Address AVP for WLAN scenario to the V-PCRF over the S9 reference point.