Page 294 - 5G Basics - Core Network Aspects

1 Core network aspects

1 Scope
This Recommendation describes the scenarios and requirements of multi-path transmission control in multi-
connection and provides the mechanisms of multi-path transmission control. The descriptions cover aspects
related to capability requirements, information flows and security.

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 Q.1706] Recommendation ITU-T Q.1706/Y.2801 (2006), Mobility management requirements
for NGN.

[ITU-T X.200] Recommendation ITU-T X.200 (1994) | ISO/IEC 7498-1:1994, Information technology
– Open Systems Interconnection.

[ITU-T X.800] Recommendation ITU-T X.800 (1991), Security architecture for Open Systems
Interconnection for CCITT applications.
[ITU-T Y.2001] Recommendation ITU-T Y.2001 (2004), General overview of NGN.

[ITU-T Y.2027] Recommendation ITU-T Y.2027 (2012), Functional architecture of Multi-connection
Requirements.

[ITU-T Y.2091] Recommendation ITU-T Y.2091 (2011), Terms and definitions for next generation
networks.

[ITU-T Y.2201] Recommendation ITU-T Y.2201 (2009), Requirements and Capabilities for ITU-T NGN.
[ITU-T Y.2233] Recommendation ITU-T Y.2233 (2008), Requirements and framework allowing
accounting and charging capabilities in NGN.
[ITU-T Y.2251] Recommendation ITU-T Y.2251 (2011), Multi-connection requirements.

3 Definitions

3.1 Terms defined elsewhere

This Recommendation uses the following terms defined elsewhere:
3.1.1 multi-connection [ITU-T Y.2251]: The functionality which provides capability to the user equipment
(UE) and network to maintain more than one access network connection simultaneously.
3.1.2 multi-connection user equipment [ITU-T Y.2027]: A user equipment which can support two or more
network connections simultaneously under the control of a network enhanced for multi-connection
capability.

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

3.2.1 multi-path connection: A set of one or more sub-transmission flows, over which the application in
a multi-path transmission enhanced multi-connection user equipment can communicate with the
corresponding application.

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