3 Definitions, symbols and abbreviations

3GPP43.318Generic Access Network (GAN)Release 16Stage 2TS

3.1 Definitions

For the purposes of the present document, the following terms and definitions apply:

AP-ID: The AP-ID (Access Point-ID) is the physical identity (e.g. MAC address) of the generic IP access network point through which the MS is accessing GAN service. This identifier is provided by the MS (obtained via broadcast from the AP) to the GANC via the Up interface, when it requests GAN service. The AP-ID may be used by the GANC to support location services. The AP-ID may also be used by the service provider to restrict GAN service access via only authorized APs.

GERAN/UTRAN Mode: MS mode of operation where the NAS layers communicate through either the GERAN RR or the UTRAN RRC entities.

GERAN/UTRAN/E-UTRAN Mode: MS mode of operation where the NAS layers communicate through either the GERAN RR, the UTRAN RRC or the E-UTRAN RRC entities.

GAN A/Gb Mode: MS mode of operation where the NAS layers communicate through the GA-CSR and GA-PSR entities.

GAN Iu Mode: MS mode of operation where the NAS layers communicate through the GA-RRC CS and GA-RRC PS entities.

GAN Mode: This term is used when a procedure applies to both GAN A/Gb mode and GAN Iu mode (e.g., see clause 8.1, "Mechanism of Mode Selection in Multi-mode terminals").

Generic Access Network: access network providing access to A/Gb or Iu interfaces via an IP network

Generic Access Network Controller: network node that connects to the MSC and SGSN via the A-interface and Gb interface (GAN A/Gb mode) or the Iu-cs interface and Iu-ps interface (GAN Iu mode) and enables access via a generic IP network.
Three different logical roles for the GANC are defined in this specification: Provisioning GANC, Default GANC and Serving GANC.

default GANC: logical role of a GANC in the HPLMN, which redirects an MS performing the GAN Registration Procedure to a preferred Serving GANC within the HPLMN or VPLMN. The Serving GANC and Default GANC may be the same entity, in which case no redirection is required.

discovery procedure: process by which the MS discovers the Default GANC in the HPLMN.

CS handover: mobile station engaged in a call (a CS domain service) moves between 3GPP access networks and GAN.

handover in: mobile station moves from 3GPP access networks to GAN.

handover out: mobile station moves from GAN to 3GPP access networks.

PS handover: A mobile station with one or more ongoing PS domain services moves between a GAN cell and a GERAN/UTRAN cell.

provisioning GANC: logical role of a GANC in the HPLMN of an MS. When an MS performs the Discovery Procedure to this GANC, the MS is provided the address of the Default GANC in the HPLMN.

redirection: process by which a Default or Serving GANC redirects an MS to an alternative Serving GANC
This alternative GANC is likely to become the Serving GANC for the MS.

registration procedure: process by which an MS requests the Generic Access Service from a GANC.

rove in: mobile station reselects from 3GPP access networks to GAN.

rove out: mobile station reselects from GAN to 3GPP access networks.

roving: action of re-selection between 3GPP access technology and GAN for a mobile station in idle mode.

seamless: free from noticeable transitions (i.e. no end-user action is required; speech interruptions are short; service interruptions are short; incoming calls are not missed; packet sessions are maintained; services work identically).

serving GANC: logical role of the GANC in a PLMN which provides an MS with the Generic Access service.

suitable cell: this is a cell on which an MS may camp. It must satisfy criteria which are defined for A/Gb mode in 3GPP TS 43.022 and for Iu mode in 3GPP TS 25.304.

user equipment: generally referred to as "mobile station" in this document.

3.2 Symbols

For the purposes of the present document, the following symbols apply:

Up Interface between MS and GANC

3.3 Abbreviations

For the purposes of the present document, the following abbreviations apply:

AAA Authentication, Authorization and Accounting

AKA Authentication and Key Agreement

AP Access Point

AS Access Stratum

BSC Base Station Controller

BSS Base Station Subsystem

BSSGP Base Station System GPRS Protocol

BSSMAP Base Station System Management Application Part

CC Call Control

CGI Cell Global Identification

CM Connection Management

CN Core Network

CS Circuit Switched

CTM Cellular Text Telephone Modem

DNS Domain Name System

DTM Dual Transfer Mode


EAP Extensible Authentication Protocol

ETSI European Telecommunications Standards Institute

FCC US Federal Communications Commission

FQDN Fully Qualified Domain Name

GA-CSR Generic Access – Circuit Switched Resources

GAD Geographical Area Description

GAN Generic Access Network

GANC Generic Access Network Controller

GA-PSR Generic Access – Packet Switched Resources

GA-RC Generic Access – Resource Control

GA-RRC Generic Access – Radio Resource Control

GERAN GSM EDGE Radio Access Network

GGSN Gateway GPRS Support Node

GMM/SM GPRS Mobility Management and Session Management

GPRS General Packet Radio Service

GSM Global System for Mobile communications

GSN GPRS Support Node

HLR Home Location Register


IETF Internet Engineering Task Force

IKE Internet Key Exchange

IMEISV International Mobile station Equipment Identity and Software Version number

IMSI International Mobile Subscriber Identity

IP Internet Protocol

LA Location Area

LAI Location Area Identity

LLC Logical Link Control

MAC Medium Access Control

MAC Message Authentication Code

MM Mobility Management

MS Mobile Station

MSC Mobile Switching Center

MTP1 Message Transfer Part layer 1

MTP2 Message Transfer Part layer 2

MTP3 Message Transfer Part layer 3

NAS Non-Access Stratum

PDP Packet Data Protocol

PDU Protocol Data Unit

PLMN Public Land Mobile Network

PS Packet Switched

PSAP Public Safety Answering Point

NOTE: A PSAP is an emergency services network element that is responsible for answering emergency calls.

PSTN Public Switched Telephone Network

P-TMSI Packet – TMSI

QoS Quality of Service

RA Routing Area

RAC Routing Area Code

RAI Routing Area Identity

RAT Radio Access Technology

RLC Radio Link Control

RNC Radio Network Controller

RTCP Real Time Control Protocol

RTP Real Time Protocol

SCCP Signalling Connection Control Part

SEGW SEcurity GateWay

SGSN Serving GPRS Support Node

SIM Subscriber Identity Module

SMLC Serving Mobile Location Center

SMS Short Message Service

SNDCP Sub-Network Dependent Convergence Protocol

TAI Tracking Area Identity

TBF Temporary Block Flow

TC Transport Channel

TCP Transmission Control Protocol

TFO Tandem Free Operation

TMSI Temporary Mobile Subscriber Identity

TrFO Transcoder Free Operation

TTY Text Telephone or TeletYpewriter

UDP User Datagram Protocol

UE User Equipment

UMTS Universal Mobile Telecommunication System

UTRAN UMTS Terrestrial Radio Access Network

VLR Visited Location Register

VPLMN Visited Public Land Mobile Network