This Recommendation specifies the resource control protocol no.3 (rcp3) COPS Profile at the Rw interface, i.e. between the Policy Decision Physical Entity (PD-PE) and the Policy Enforcement Physical Entity (PE-PE) in the Resource and Admission Control Function block. This protocol profile allows the final admission policy decisions to be installed (either push or pull mode) to a PE-PE from a PD-PE, supports resource control for both fixed and mobile networks and supports the NAPT Control and NAT Traversal at PE-PEs as needed. It satisfies the requirements for information flows across the Rw reference point as specified in clause 9.2of [ITU-T Y.2111] and in [b-ITU-T Q.Sup51].