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Acronyms

Some acronyms from telecommunication world (but not only)
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 Project

A

AAA - Authentication Authorization Accounting
AAL - ATM Adaptation Layer
AMR - Adaptive Multi Rate
AS - Application Server
AMF - Access and Mobility Management Function

B

BSC - Base Station Controler
BGCF - Breakout Gateway Control Function
BICC - Bearer Independent Call Control
BTS - Base Transceiver Station
BSS - Base Station Subsystem

C

CC - Call Control
CDMA - 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 Channel
DCI - Downlink Control Information

E

EUL - Enhanced Uplink
E-DCH - Enhanced Dedicated Channel
EDGE - Enhanced Data rates for GSM Evolution
EPC - Evolved Packet Core
EPS - Evolved Packet System

F

FDD - Frequency Division Duplex
FDMA - Frequency Divsion Multiple Access

G

GERAN - GSM/EDGE Radio Access Network
GGSN - 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 Request
HLR - Home Location Register
HSCSD - High Speed Circuit Switched Data
HSPA - High Speed Packet Access
HSS - Home Subscriber System

I

IAM - Initial Address Message
I-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 Area
LAA - License Assisted Access
LAU - Location Area Update
LTE - Long Term Evolution

M

MAC - Medium Access Control
MSC - Mobile Switching Center
MIMO - 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
MCG - Master Cell Group

N

NMO - Network Mode of Operation / Network Operation Mode

O

OFDM - Orthogonal Frequency Division Multiplexig
OFDMA - Orthogonal Frequency Division Multiple Access

P

PCRF - Policy Control Rule Function
PUCCH - Physical Uplink Control Channel
PDCP - Packet Data Convergence Protocol

Q

QoS - Quality of Service
QAM - Quadrature Amplitude Modulation
QPSK - Quadrature Phase Shift Keying

R

RAN - Radio Access Network
RNC - 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
RLC - Radio Link Control

S

S-CSCF - Serving Call Session Control Function
SC-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
SMF - Session Management Function
SRVCC - Single Radio Voice Call Continuity
SS7 - Signalling System No 7
SISO - Single Input Single Output
SIMO - Single Input Multiple Output
SCG - Secondary Cell Group

T

TA - Tracking Area
TAU - Tracking Area Update
TDD - Time Division Duplex
TDMA - Time Division Mutiple Access
TDM - Time Division Multiplexing

U

UCI - Uplink Control Information
UTRAN - UMTS Terrestial Radio Access Network
UMTS - Universal Mobile Telecommunications System
UE - User Equipment

V

VLR - Visitor Location Register
VoIP - Voice over IP
VoLTE - Voice over LTE

W

WCDMA - Wideband Code Division Multiple Access

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NAS: Non-Access Stratum

This post is to give short description of NAS protocols, procedures and functions.
NAS is a layer for communication between Ue and Core Network (CN). This communication is transparent for underlaying Access Stratum.
NAS protocols:
GMM - GPRS Mobility ManagementMM - Mobility Management SM - Session ManagementCC - Call Control SS - Supplementary Services SMS - Short Message Services SM, SMS, SS and CC form a group of protocols called Connection Management.


Figure - Inter protocols communication MS side [3GPP 24.007]



SM - its functions is to activate, deactivate or modify PDP contexts which are sessions for PS traffic in UMTS/GPRS networks

Figure 1 - Simplified PDP context activation procedure



Figure 2 - Inter protocol communication for PDP context activation - MS side



CC - its functions is to establish, maintain and finally release CS calls in UMTS/GPRS/GSM networks

Figure 3- Simplified CS call proceeding


Figure 4 - Inter protocol communication for CS call setup



Abbreviations

ABCDEFGHIJKLMNPRSTUWV
3GPPThird Generation Partnership Project
AALATM Adaptation Layer
ADCHAssociated DCH
ADSLAsymetric Digital Subscriber Line
ALCAPAccess Link Control Application Part
ARFCNAbsolute Radio Frequency Channel Number
ARQAutomatic Repeat reQuest
ATMAsynchronous Transfer Mode
BCCHBroadcast Control Channel
BCHBroadcast ChannelBERBit Error RateBICCBearer Independent Call ControlBLERBlock Error RateBPSKBinary Phase Shift KeyingBSCBase Station ControllerBSSBase Station SubsystemBTSBase Transceiver StationCAMELCustomised Applications for Mobile network Enhanced Logic
CCCall Control
CCCHCommon Control Channel
CDMCode Division Multiplexing
CDMACode Division Multiple Access
CNCore Network
CMConnection Management
CPICHCommon Pilot Channel
CQIChannel Quality Indicator
CRCCyclic Redundancy Check
C-RNTICell Radio Network Temporary Identifier
CSCirciut Switch
CRNCControlling Radio Network Controller
DCHDedicated Channel
DNSDomain Name Server
DL-SCHDownlink Shared Channel
DRNCDrift Radio Network Controller
DS-CDM…

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