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Content for  TS 43.318  Word version:  16.0.0

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1  ScopeWord‑p. 8
The present document defines the stage 2 service description for a Generic Access Network (GAN). It describes the GAN system concepts, documents the reference architecture, functional entities, network interfaces, and high-level procedures.
GAN supports two modes of operation:
  • GAN A/Gb mode
  • GAN Iu mode
GAN A/Gb mode supports an extension of GSM/GPRS mobile services that is achieved by tunnelling Non Access Stratum (NAS) protocols between the MS and the Core Network over an IP network and the A and Gb interfaces to the MSC and SGSN, respectively.
GAN Iu mode supports an extension of UMTS mobile services that is achieved by tunnelling Non Access Stratum (NAS) protocols between the user equipment (MS) and the Core Network over an IP network and the Iu-cs and Iu-ps interfaces to the MSC and SGSN, respectively.
Both GAN modes are complements to traditional GERAN/UTRAN/E-UTRAN radio access network coverage.
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2  References

The following documents contain provisions which, through reference in this text, constitute provisions of the present document.
  • References are either specific (identified by date of publication, edition number, version number, etc.) or non specific.
  • For a specific reference, subsequent revisions do not apply.
  • For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.
[1]
TS 23.002: "Network architecture".
[2]
TS 23.009: "Handover procedures".
[3]
TS 23.271: "Location Services (LCS); Functional description; Stage 2".
[4]
TS 23.122: "Non-Access-Stratum functions related to Mobile Station (MS) in idle mode".
[5]
TS 23.236: "Intra-domain connection of Radio Access Network (RAN) nodes to multiple Core Network (CN) nodes".
[6]
TS 24.008: "Mobile radio interface layer 3 specification; Core network protocols; Stage 3".
[7]
TS 26.071: "AMR speech codec; General description".
[8]
TS 29.234: v11.2.0, "3GPP system to Wireless Local Area Network (WLAN) interworking, Stage 3".
[9]
TS 33.234: v.12.1.0, "3G security; Wireless Local Area Network (WLAN) interworking security".
[10]
TS 43.020: "Security related network functions".
[11]
TS 48.004: "Base Station System - Mobile-services Switching Centre (BSS-MSC) interface; Layer 1 specification".
[12]
TS 48.006: "Signalling transport mechanism specification for the Base Station System - Mobile-services Switching Centre (BSS-MSC) interface".
[13]
TS 48.008: "Mobile Switching Centre - Base Station System (MSC-BSS) interface; Layer 3 specification".
[14]
TS 48.014: "General Packet Radio Service (GPRS); Base Station System (BSS) - Serving GPRS Support Node (SGSN) interface; Gb interface Layer 1".
[15]
TS 48.016: "General Packet Radio Service (GPRS); Base Station System (BSS) - Serving GPRS Support Node (SGSN) interface; Network Service".
[16]
TS 48.018: "General Packet Radio Service (GPRS); Base Station System (BSS) - Serving GPRS Support Node (SGSN) interface; BSS GPRS protocol".
[17]
TS 43.059: "Functional stage 2 description of Location Services (LCS) in GERAN".
[18]
TS 45.008: "Radio subsystem link control".
[19]
RFC 793:  "Transmission Control Protocol".
[20]
RFC 3550:  "RTP: A Transport Protocol for Real-Time Applications".
[21]  Void.
[22]  Void.
[23]  Void.
[24]  Void.
[25]  Void.
[26]  Void.
[27]  Void.
[28]  Void.
[29]  Void.
[30]
RFC 4186:  "Extensible Authentication Protocol Method for Global System for Mobile Communications (GSM) Subscriber Identity Modules (EAP-SIM)".
[31]  Void.
[32]
RFC 5996:  "Internet Key Exchange Protocol Version 2 (IKEv2)".
[33]  Void.
[34]  Void.
[35]  Void.
[36]
RFC 2486:  "The Network Access Identifier".
[37]
RFC 768:  "User Datagram Protocol".
[38]
RFC 4187:  "Extensible Authentication Protocol Method for 3rd Generation Authentication and Key Agreement (EAP-AKA)".
[39]
RFC 791:  "Internet Protocol".
[40]
TS 25.331: "Radio Resource Control (RRC) protocol specification".
[41]
TS 23.032: "Universal Geographical Area Description (GAD)".
[42]  Void.
[43]
TS 23.003: "Numbering, addressing and identification".
[44]
TS 43.129: " Packet-switched handover for GERAN A/Gb mode; Stage 2".
[45]
TS 25.410: "UTRAN Iu Interface: general aspects and principles".
[46]
TS 25.411: "UTRAN Iu interface layer 1".
[47]
TS 25.412: "UTRAN Iu interface signalling transport".
[48]
TS 25.413: "UTRAN Iu interface Radio Access Network Application Part (RANAP) signalling".
[49]
TS 25.414: "UTRAN Iu interface data transport & transport signalling".
[50]
TS 25.415: "UTRAN Iu interface user plane protocols".
[51]
TS 25.419: "UTRAN Iu-BC interface: Service Area Broadcast Protocol (SABP)".
[52]
TS 25.450: "UTRAN Iupc interface general aspects and principles".
[53]
TS 22.011: "Service accessibility".
[54]
RFC 4867,  April 2007: "RTP Payload Format and File Storage Format for the Adaptive Multi-Rate (AMR) and Adaptive Multi-Rate Wideband (AMR-WB) Audio Codecs".
[55]
TS 33.210: "Network Domain Security (NDS); IP network layer security".
[56]
RFC 4303:  "IP Encapsulating Security Payload (ESP)".
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3  Definitions, symbols and abbreviationsWord‑p. 10

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 TS 43.022 and for Iu mode in TS 25.304.
user equipment:
generally referred to as "mobile station" in this document.
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3.2  SymbolsWord‑p. 11
For the purposes of the present document, the following symbols apply:
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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
E-UTRAN
Evolved UTRAN
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
HPLMN
Home PLMN
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
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
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