Introduction of service-based architecture for 5G, expanding the scope of policy management, the policy management for 5G will be built on service-based management architecture.
A Policy MnS producer has the following capabilities:
Storing the defined network policy.
Detecting policy conflict, reporting the conflict information and give suggestions for solving the conflict.
Making the policy execution decisions, which means it take the decision to trigger or perform an action.
Evaluating the effectiveness of the network policy execution.
The MnS of various kinds are specified for deployment over many standardized reference interfaces. So, the policy MnS could in principle, be specified for deployment over the same set of standardized reference interfaces, as a replacement of or as an addition to the policy related driven MnS.
There may be policy conflict problem, which is a new activated policy may be conflict with an existing activated policy.
When the Policy MnS producer detects the conflict, it can report the conflict information and give suggestions to solve it. ETSI GR NFV-IFA 023  descripts policy conflict detection UCs and how to resolve them.
There are multiple scenarios for policy conflict, for example:
If the events are the same and the same condition are triggered (e.g. scaling policy on a VNF), but two policies have different actions, the conflict should be detected and resolved.
If the event and condition of two policies are not be the same, but the different actions (e.g. scaling policy vs. termination policy on a VNF) are towards the same entity. The conflict should be detected and resolved.
If scenario 1) or 2) is enforced by different Policy MnS producers. The conflict should be detected and resolved.