Page 45 - ITU-T Focus Group IMT-2020 Deliverables

ITU-T Focus Group IMT-2020 Deliverables 2

1 Scope
This draft Recommendation provides the framework of IMT-2020 network architecture. Following an
overview of this IMT-2020 network architecture framework, a high-level functional architecture of IMT-2020
network, including functional entities and reference points, is specified.

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 editors 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
published regularly.
NOTE – The reference to a document within this Recommendation does not give it, as a stand-alone
document, the status of a Recommendation.
[ITU-R M.2083-0] Recommendation ITU-R M.2083-0 (2015), Framework and overall objectives of the
future development of IMT for 2020 and beyond.

[ITU-T Y.3001] Recommendation ITU-T Y.3001 (2011), Future networks: Objectives and design goals.

3 Terms and definitions

3.1 Terms defined elsewhere
3.1.1 control plane [ITU-T Rec. Y.2011 (10/2004)]: The set of functions that controls the operation of
entities in the stratum or layer under consideration, plus the functions required to support this control.
3.1.2 data plane [ITU-T Rec. Y.2011 (10/2004)]: The set of functions used to transfer data in the stratum
or layer under consideration.
3.1.3 functional architecture [ITU-T Rec. Y.2016 (08/2009)]: A set of functional entities used to describe
the structure of an NGN. These functional entities are separated by reference points, and thus, they define
the distribution of functions. The functional entities can be used to describe a set of reference configurations.
These reference configurations identify which reference points are visible at the boundaries of equipment
implementations and between administrative domains.
3.1.4 functional entity [ITU-T Rec. Y.2082 (08/2013): An entity that comprises an indivisible set of specific
capabilities. Functional entities are logical concepts, while groupings of functional entities are used to
describe practical, physical implementations.
3.1.5 logical resource [ITU-T Y.3011]: An independently manageable partition of a physical resource,
which inherits the same characteristics as the physical resource and whose capability is bound to the
capability of the physical resource.
3.1.6 management plane [ITU-T Rec. Y.2011 (10/2004)]: The set of functions used to manage entities in
the stratum or layer under consideration, plus the functions required to support this management.
3.1.7 user plane [ITU-T Rec. Y.2011 (10/2004)]: A synonym for user plane.
3.1.8 virtual resource [ITU-T Y.3011]: An abstraction of physical or logical resource, which may have
different characteristics from the physical or logical resource and whose capability may not be bound to the
capability of the physical or logical resource.

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