This document specifies the signalling flows for NGN RACF, which includes the entities, viz.,
Policy Decision Physical Entity (PD-PE), Transport Resource Control Physical Entity (TRC-PE)
and Policy Enforcement Physical Entity (PE-PE). The various interfaces involving these entities
are Rs (rcp1), Rp (rcp2), Rw (rcp3), Rc (rcp4), Rt (rcp5), Rd (rcp6), Ru and Ri. In addition, this
document specifies the QoS parameter mapping across the various protocols for different signalling
flows.
Figure 1 shows the RACF architecture.