# A B C D E F G H I J K L M N O P Q R S T U W X V Y Z
3GPP has its own list of terms - [21.905]
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3GPP - 3rd Generation Partnership ProjectA
AAA - Authentication Authorization AccountingAAL - ATM Adaptation Layer
AMR - Adaptive Multi Rate
AS - Application Server
B
BSC - Base Station ControlerBGCF - Breakout Gateway Control Function
BICC - Bearer Independent Call Control
BTS - Base Transceiver Station
BSS - Base Station Subsystem
C
CC - Call ControlCDMA - Code Division Multiple Access
CSCF - Call Session Control Function
CSFB - Circuit Switch Fallback
CM - Connection Management
CS - Circuit Switched
CQI - Channel Quality Indicator
CSI - Channel State Information
D
DCH - Dedicated ChannelDCI - Downlink Control Information
E
EUL - Enhanced UplinkE-DCH - Enhanced Dedicated Channel
EDGE - Enhanced Data rates for GSM Evolution
EPC - Evolved Packet Core
EPS - Evolved Packet System
F
FDD - Frequency Division DuplexFDMA - Frequency Divsion Multiple Access
G
GERAN - GSM/EDGE Radio Access NetworkGGSN - Gateway GPRS Supporting Node
GMSC - Gateway Mobile Switching Center
GPRS - General Packet Radio Service
GSM - Global System for Mobile Telecommunication
GTP - GPRS Tunneling Protocol
H
HARQ - Hybrid Automatic rePeat RequestHLR - Home Location Register
HSCSD - High Speed Circuit Switched Data
HSPA - High Speed Packet Access
HSS - Home Subscriber System
I
IAM - Initial Address MessageI-CSCF - Interrogating Call Session Control Function
ICT - Information and communications technology
IMS - IP Multimedia Subsystem
IMSI - International Mobile Subscriber Identity
IP - Internet Protocol
ISDN - Integrated Services Digital Network
ISR - Idle mode Signalling Reduction
ISUP - ISDN User Part
ITU - International Telecommunication Union
L
LA - Location AreaLAA - License Assisted Access
LAU - Location Area Update
LTE - Long Term Evolution
M
MSC - Mobile Switching CenterMIMO - Multiple Input Multiple Output
MISO - Multiple Input Single Output
MGCF - Media Gateway Control Function
MGW - Media GateWay
MO - Mobile Originated
MME - Mobility Management Entity
MMTel - MultiMedia Telephony
MRFC - Media Resource Function Controller
MRFP - Media Resource Function Processor
MSC-S - Mobile Switching Center – Server
MT - Mobile Terminated
N
NMO - Network Mode of Operation / Network Operation ModeO
OFDM - Orthogonal Frequency Division MultiplexigOFDMA - Orthogonal Frequency Division Multiple Access
P
PCRF - Policy Control Rule FunctionPUCCH - Physical Uplink Control Channel
Q
QoS - Quality of ServiceQAM - Quadrature Amplitude Modulation
QPSK - Quadrature Phase Shift Keying
R
RAN - Radio Access NetworkRNC - Radio Network Controler
RA - Routing Area
RAU - Routing Area Update
RAT - Radio Access Technology
RNS - Radio Network Subsystem
RRC - Radio Resource Control
RTT - Round Trip Time
S
S-CSCF - Serving Call Session Control FunctionSC-FDMA - Single Carrier Frequency Division Multiple Access
SAE - System Architecture Evolution
SBC - Session Border Controller
SLF - Subscription Locator Function
SIP - Session Initiation Protocol
SCTP - Stream Control Transmission Protocol
SGSN - Serving GPRS Supporting Node
SGW - Serving GateWay
SMS - Short Message Service
SRVCC - Single Radio Voice Call Continuity
SS7 - Signalling System No 7
SISO - Single Input Single Output
SIMO - Single Input Multiple Output
T
TA - Tracking AreaTAU - Tracking Area Update
TDD - Time Division Duplex
TDMA - Time Division Mutiple Access
TDM - Time Division Multiplexing
U
UCI - Uplink Control InformationUTRAN - UMTS Terrestial Radio Access Network
UMTS - Universal Mobile Telecommunications System
UE - User Equipment
V
VLR - Visitor Location RegisterVoIP - Voice over IP
VoLTE - Voice over LTE
