Page 16 - 5G Basics - Core Network Aspects

1 Core network aspects

1 Scope

This Recommendation describes objectives and design goals for future networks (FNs). The scope of this
Recommendation covers:
• Fundamental issues to which insufficient attention was paid in designing current networks, and
which are recommended to be the objectives of future networks (FNs)

• High-level capabilities and characteristics that are recommended to be supported by future
networks (FNs)
• Target timeframe for future networks (FNs).

Ideas and research topics of future networks (FNs) that are important and may be relevant to future ITU-T
standardization are included in Appendix I.

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 F.851] Recommendation ITU-T F.851 (1995), Universal Personal Telecommunication (UPT) –
Service description (service set 1).
[ITU-T Y.2001] Recommendation ITU-T Y.2001 (2004), General overview of NGN.

[ITU-T Y.2019] Recommendation ITU-T Y.2019 (2010), Content delivery functional architecture in
NGN.

[ITU-T Y.2091] Recommendation ITU-T Y.2091 (2008), Terms and definitions for Next Generation
Networks.
[ITU-T Y.2205] Recommendation ITU-T Y.2205 (2011), Next Generation Networks – Emergency
telecommunications – Technical considerations.
[ITU-T Y.2221] Recommendation ITU-T Y.2221 (2010), Requirements for support of ubiquitous
sensor network (USN) applications and services in the NGN environment.
[ITU-T Y.2701] Recommendation ITU-T Y.2701 (2007), Security Requirements for NGN release 1.

3 Definitions

3.1 Terms defined elsewhere

This Recommendation uses the following term defined elsewhere:
3.1.1 identifier [ITU-T Y.2091]: An identifier is a series of digits, characters and symbols or any other form
of data used to identify subscriber(s), user(s), network element(s), function(s), network entity(ies) providing
services/applications, or other entities (e.g., physical or logical objects).

3.2 Terms defined in this Recommendation
This Recommendation defines the following terms.

3.2.1 component network: A single homogeneous network which, by itself, may not provide a single end-
to-end global telecommunication infrastructure.

3.2.2 future network (FN): A network able to provide services, capabilities, and facilities difficult to
provide using existing network technologies. A future network is either:

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