The BBERF acts as a policy enforcement point for bearer binding,
uplink bearer binding verification and event reporting to the PCRF.
This function entity is located at a GW (e.g. S-GW in the 3GPP access with PMIP based S5/S8 case, HSGW in the
Part of the operator network, which is outside the core network, which receives and processes CDR
files from the core network charging functions. It includes functions that can provide billing mediation and billing or
other (e.g. statistical) end applications. It is only applicable to offline charging.
The BGCF determines the next hop for routing the SIP message. This determination may be based on information
received in the protocol, administrative information, and/or database access. For PSTN terminations, the BGCF
determines the network in which PSTN/CS Domain breakout is to occur. If the routing determination is such that the
breakout is to occur in the same network in which the BGCF is located, then the BGCF shall select a MGCF that will be
responsible for the interworking with the PSTN/CS Domain. If the routing determination results in break out in another
network, the BGCF will forward this session signalling to another BGCF in the selected network. If the routing
determination results in the session being destined for another IMS network, the BGCF forwards the message to an
I‑CSCF in this IMS network. If the BGCF determines that there is another IP destination for the next hop, it forwards
the message to that contact point.
The BM-SC provides functions for MBMS user service provisioning and delivery. It may
serve as an entry point for content provider MBMS transmissions, used to authorise and initiate MBMS Bearer Services within the PLMN and can be used to schedule and deliver MBMS transmissions.
The BSS is the system of base station equipments (transceivers, controllers, etc.) which is viewed
by the MSC through a single A and/or Iu-CS interface as being the entity responsible for communicating with Mobile
Stations in a certain area. Similarly, in PLMNs supporting GPRS, the BSS is viewed by the SGSN through a single Gb
or Iu-PS interface.