Page 527 - 5G Basics - Core Network Aspects

Core network aspects 1

sets of devices depending on the situation. However, in this Recommendation, one device set per user is
considered.

3.2.3 switchover: The manual switch (or change) from one device to another device that belongs to the
same user, to meet the needs of that user. It is assumed that, in a handover scenario, the user can move and
roam between access networks using one single device within the mobility management framework.
However, in this Recommendation it is assumed that the user can select and change devices, from among
multiple devices, in a switchover scenario.

3.2.4 applications with multiple devices: When more than two user devices are used for a single
application scenario such as one source multi use, etc. Three types of applications using multiple devices are
taken in consideration in this Recommendation: One-to-multiple devices, multiple devices-to-one device and
multiple devices-to-multiple devices applications.
− One-to-multiple devices application: It refers to application between a single entity (or sender) and
a bundle of entities (or multiple receivers). Application with one source multi use is one example
which consists of one content source on the sender side, and multiple devices on the receiver side.

− Multiple devices-to-one application: It refers to an application between a bundle of entities
(or multiple senders) and a single entity (or receiver).

− Multiple devices-to-multiple devices application: It refers to an application between two bundles of
entities comprising device sets. Both sender and receiver are made up of a bundle of devices that
communicate with each other.
3.2.5 activated device: A user device that is selected by the user and is currently in use for on-going
application.
3.2.6 deactivated device: A user device that is neither selected nor used by the user for application.
Deactivated device can become an activated device based on user's selection.

3.2.7 seamless service: A service that is implemented in such way that it will ensure that users will not
experience any service disruptions while changing the point of attachment or while changing devices.

4 Abbreviations and acronyms

This Recommendation uses the following abbreviations and acronyms:
AAA Authentication, Authorization and Accounting
A-MMCF Access MMCF

C-MMCF Central MMCF
HCF Handover Control Function

IMSI International Mobile Subscriber Identifier
LMF Location Management Function
MM Mobility Management

MMCF Mobility Management Control Function
NACF Network Attachment Control Function

NAI Network Access Identifier
NGN Next Generation Network

OSMU One- source Multi- use
RACF Resource Admission and Control Function

SCF Service Control Function
UE User Equipment

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