Page 426 - 5G Basics - Core Network Aspects

1 Core network aspects

[ITU-T Y.2001] ITU-T Recommendation Y.2001 (2004), General overview of NGN.

[ITU-T Y.2011] ITU-T Recommendation Y.2011 (2004), General principles and general reference
model for Next Generation Networks.
[ITU-T Y.2021] ITU-T Recommendation Y.2021 (2006), IMS for Next Generation Networks.
[ITU-T Y.2031] ITU-T Recommendation Y.2031 (2006), PSTN/ISDN emulation architecture.

[ITU-T Y.2091] ITU-T Recommendation Y.2091 (2007), Terms and definitions for Next Generation
Networks.

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). Identifiers can be used for
registration or authorization. They can be either public to all networks, shared between a limited number of
networks or private to a specific network (private IDs are normally not disclosed to third parties).

3.2 Terms defined in this Recommendation

This Recommendation defines the following terms:
3.2.1 fixed mobile convergence: In a given network configuration, the capabilities that provide services
and application to the end user defined in [ITU-T Y.2091] regardless of the fixed or mobile access technologies
being used and independent of the user's location. In the NGN environment [ITU-T Y.2011], it means to
provide NGN services to end users regardless of the fixed or mobile access technologies being used.

3.2.2 fixed network: A network that provides wire-based (e.g., copper, fibre) or wireless access to its
services. The fixed network may support nomadism, but does not support mobility.

3.2.3 mobile network: A network that provides wireless access to its services and supports mobility.

4 Abbreviations and acronyms
This Recommendation uses the following abbreviations and acronyms:

2G Second Generation
API Application Programming Interface
AS Application Server

ATM Asynchronous Transfer Mode
CAMEL Customized Applications for Mobile network Enhanced Logic

CAP CAMEL Application Part
CATV Community Antenna Television (commonly referred to as Cable TV)
CDMA Code Division Multiple Access

CDR Call Detail Record
CS Circuit Switched

DAB Digital Audio Broadcast
DSL Digital Subscriber Line

DVB Digital Video Broadcasting

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