Content for TS 28.555 Word version: 18.0.0
0 Introduction
1 Scope
2 References
3 Definitions of terms, symbols and abbreviations
4 Concepts and Background
4.1 Policy MnS
4.2 Policy conflict detection and resolution
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0 Introduction p. 5
The present document is part of a TS-family covering the 3rd Generation Partnership Project Technical Specification Group Services and System Aspects Management and orchestration of networks, as identified below:
TS 28.555:
Policy management for 5G mobile networks; Stage 1 [2].
TS 28.556:
Policy management for 5G mobile networks; Stage2 and Stage3 [3].
1 Scope p. 6
The present document specifies the concepts, requirements and use cases for network policy management in 5G networks.
2 References p. 6
The following documents contain provisions which, through reference in this text, constitute provisions of the present document.
- References are either specific (identified by date of publication, edition number, version number, etc.) or non-specific.
- For a specific reference, subsequent revisions do not apply.
- For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.
[1]
TR 21.905: "Vocabulary for 3GPP Specifications".
[2]
TS 28.555: "Management and orchestration; Network policy management for 5G mobile networks; Stage 1".
[3]
TS 28.556: "Management and orchestration; Network policy management for 5G mobile networks; Stage 2 and Stage 3".
[4]
ETSI GR NFV-IFA 023 (V3.1.1): "Network Functions Virtualisation (NFV); Management and Orchestration; Report on Policy Management in MANO; Release 3".
3 Definitions of terms, symbols and abbreviations p. 6
3.1 Terms p. 6
For the purposes of the present document, the terms given in TR 21.905 and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905.
3.2 Symbols p. 6
Void.
3.3 Abbreviations p. 6
4 Concepts and Background p. 7
4.1 Policy MnS p. 7
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.
4.2 Policy conflict detection and resolution p. 7
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 [4] 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.
