Summary

Recommendation ITU-T Q.3306.1 specifies the rcp6 protocol used between intra-domain policy decision physical entities (PD-PEs) in the resource and admission control functional block. This interface operates across the Rd reference point as defined in Recommendation ITU-T Y.2111. It is used for inter‑communication between PD-PEs that can optionally be deployed in larger domains for scalability reasons.