Page 148 - 5G Basics - Core Network Aspects

1 Core network aspects

1 Scope
This Recommendation describes the framework of software-defined networking (SDN) by providing:

– definitions,
– objectives,
– high-level capabilities,
– requirements, and
– high-level architecture

of the fundamentals of SDN.
In addition, Appendix I describes areas for further consideration in SDN standardization.

2 References

The following ITU-T Recommendations and other references contain provisions which, through reference in
this text, constitute provisions of this Recommendation. At the time of publication, the editions indicated
were valid. All Recommendations and other references are subject to revision; users of this Recommendation
are therefore encouraged to investigate the possibility of applying the most recent edition of the
Recommendations and other references listed below. A list of the currently valid ITU-T Recommendations is
regularly published. The reference to a document within this Recommendation does not give it, as a stand-
alone document, the status of a Recommendation.
[ITU-T Y.3001] Recommendation ITU-T Y.3001 (2011), Future Networks: Objectives and Design Goals.

[ITU-T Y.3011] Recommendation ITU-T Y.3011 (2012), Framework of network virtualization for Future
Networks.

[ITU-T M.3400] Recommendation ITU-T M.3400 (2000), TMN management functions.

3 Definitions

3.1 Terms defined elsewhere
This Recommendation uses the following term defined elsewhere:

3.1.1 network virtualization [ITU-T Y.3011]: A technology that enables the creation of logically isolated
network partitions over shared physical networks so that heterogeneous collection of multiple virtual
networks can simultaneously coexist over the shared networks. This includes the aggregation of multiple
resources in a provider and appearing as a single resource.

3.2 Terms defined in this Recommendation
This Recommendation defines the following term:

3.2.1 software-defined networking: A set of techniques that enables to directly program, orchestrate,
control and manage network resources, which facilitates the design, delivery and operation of network
services in a dynamic and scalable manner.

4 Abbreviations and acronyms
This Recommendation uses the following abbreviations and acronyms:

AAA Authentication, Authorization, and Accounting
FCAPS Fault, Configuration, Accounting, Performance, and Security

OSI Open System Interconnection
SDN Software-Defined Networking

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