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Content for  TR 28.800  Word version:  15.0.0

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0  IntroductionWord‑p. 5
The Study on management and orchestration architecture of next generation networks and services is to align the next generation management architecture with consideration of support the next generation management functions. Studying the management and orchestration architecture will evaluate whether the existing management mechanisms can be applicable or need to be enhanced to support the next generation management and orchestration features.

1  ScopeWord‑p. 6
The present document investigates and makes recommendations on management and orchestration architecture of next generation networks and services which include:
  • The terminology associated with management and orchestration of next generation networks and services.
  • The use cases on the management and orchestration architecture from the output of other next generation management functional studies (e.g. management and orchestration of network slicing, management of next generation features, service management and orchestration, etc.).
  • The use cases that may impact the management and orchestration architecture which are not addressed by functional studies.
  • The management and orchestration architecture to support network operational features such as real-time, on demand, automation etc. as evolution from LTE management.
  • The management and orchestration architecture to support vertical applications (e.g. management architecture support to the V2X, critical communications etc.) in the next generation network based on the other management functional studies.
  • The management and orchestration architecture to support the scenario in which the applications are hosted close to the access network based on the other management functional studies.
  • The management and orchestration architecture to support management and orchestration aspect of E2E user services in the next generation network based on the other management functional studies.
  • Investigate whether the existing 3GPP management architecture can be reused, or needs to be enhanced.
  • Take into consideration the outcome on next generation network architecture and study the potential management and orchestration architecture aspects of the end to end architecture.
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2  References

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]
TR 23.799: "Study on Architecture for Next Generation System".
[3]
ETSI GS NFV 003: "Network Functions Virtualisation (NFV); Terminology for Main Concepts in NFV".
[4]
TR 28.802: "Study on management aspect of next generation work architecture and feature".
[5]
NGMN Description of Network Slicing Concept:
[6]
TR 38.801: "Study on New Radio Access Technology; Radio Access Architecture and Interfaces".
[7]
TS 23.501: "System Architecture for the 5G System; Stage 2".
[8]
TR 28.801: "Study on management and orchestration of network slicing for next generation network"
[9]
TS 22.261: "Technical Specification Group Services and System Aspects; Service requirements for the 5G system; Stage 1".
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3  Definitions and abbreviationsWord‑p. 7

3.1  Definitions

For the purposes of the present document, the terms and definitions 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.
5G NE:
refers to a Network Element that is considered part of a 5G system [7].
Infrastructure Resource:
network components that build up the environment for 3GPP NFs.
Physical Resource:
A physical asset for computation, storage or transport including radio access. Defined in NGMN Description of Network Slicing Concept [5].
Logical Resource:
Partition of a physical resource, or grouping of multiple physical resources dedicated to a Network Function or shared between a set of Network Functions. Defined in NGMN Description of Network Slicing Concept [5].
Network Functions Virtualisation Infrastructure (NFVI):
totality of all hardware and software components which build up the environment in which VNFs are deployed. Defined in ETSI GS NFV 003 [3].
Network Function:
Network function is a 3GPP adopted or 3GPP defined processing function in a network, which has defined functional behaviour and 3GPP defined interfaces. Defined in TR 23.799.
Virtualized Network Function:
implementation of an NF that can be deployed on a Network Function
Virtualisation Infrastructure (NFVI):
Defined in ETSI GS NFV 003 [3].
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3.2  Abbreviations

For the purposes of the present document, the abbreviations given in TR 21.905 and the following apply.
An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in TR 21.905.

4  Management architecture introduction

The management system of next generation network will include the management features of the network, the network slicing instances and slice subnet instances etc.
The next generation network may be composed of virtualized network elements and non-virtualized network elements. The management of next generation network could make use of the management functions for the virtualized network functions. The management of the network element may include the network function management and resource management.
For the management of the virtualized network elements, the virtualized resource supporting the network element is managed by NFV-MANO. The 3GPP network functions are managed by 3GPP network management functions. The management of virtualized core network nodes in LTE is supported in Rel-14.
For the management of the non-virtualized network elements, both network function and network resource is managed by 3GPP network management functions.
The next generation network may also include LTE nodes, ref. [6].
If an evolution of the LTE management system is chosen, the following needs to be done to get basic management standards for NR and LTE. Management of new functions will need enhancement of the LTE management systems.
  1. New NRMs (object models) are needed for the radio access network and core network for the next generation network.
  2. New measurement specifications are needed for NR features and nodes.
  3. The existing 3GPP management specifications needs to be checked for which functions will be supported in the first release of the next generation network (e.g. with respect to features like trace and MDT).
New features like Network Slicing and virtualised functions which are part of RAN may need new management features/support.
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