The various embodiments include methods, computers and communication systems for distributing telecommunications functionality across multiple heterogeneous domains within a telecommunications system, which may include determining policy-charging capabilities of a first telecommunications domain, determining policy-charging capabilities of a second telecommunications domain, determining policy-charging requirements required for a communication, partitioning the policy-charging requirements into a first group and a second group based on the determined policy-charging capabilities of the first and second telecommunications domains, sending a first message including the first group of policy-charging requirements to a public interface of the first domain, and sending a second message including the second group of policy-charging requirements to a public interface of the second domain.