Page 8 - ITU-T Focus Group IMT-2020 Deliverables

1 ITU-T Focus Group IMT-2020 Deliverables

Terms and definitions for IMT-2020 in ITU-T

1 Usage of Terms defined elsewhere
The following terms defined elsewhere have referenced by deliverables of FG IMT-2020.

Control plane [ITU-T Y.2011]: 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.

Data plane [ITU-T Y.2011]: The set of functions used to transfer data in the stratum or layer under
consideration.

Functional architecture [ITU-T Y.2016]: 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.
Functional entity [ITU-T Y.2012]: 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.

IMT-2020 [ITU-R M.2083-0]: systems, system components, and related aspects that support to provide far
more enhanced capabilities than those described in Recommendation ITU-R M.1645.

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.
NOTE – "independently" means mutual exclusiveness among multiple partitions at the same level.

Management plane [ITU-T Y.2011]: The set of functions used to manage entities in the stratum or layer under
consideration, plus the functions required to support this management.
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.
Software-defined networking [ITU-T Y.3300]: 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.
User plane [ITU-T Y.2011]: A synonym for data plane.

User plane [ITU-T Y.1714]: Refers to the set of traffic forwarding components through which traffic flows.
NOTE – "User plane" is also referred to as "transport plane" in other ITU-T Recommendations.
Virtualized Network Function [ITU-T Y.3321]: A network function whose functional software is decoupled
from hardware, and runs on virtual machine(s).
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 be not bound to the capability
of the physical or logical resource.

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