Abbreviations

AAL5                    ATM Adaptation Layer type 5

ADD                      Automatic Device Detection

APN                       Access Point Name

ATM                      Asynchronous Transfer Mode

AUTN                    Authentication Token

BCM                     Bearer Control Mode

BG                         Border Gateway

BSSAP+                Base Station System Application Part +

BSSGP                  Base Station System GPRS Protocol

BVCI                     BSSGP Virtual Connection Identifier

CCU                      Channel Codec Unit

CDR                      Call Detail Record

CGF                       Charging Gateway Functionality

CGI                        Cell Global Identification

CK                         Cipher Key

CMM                    Circuit Mobility Management

CS                          Circuit Switched

DHCP                    Dynamic Host Configuration Protocol

DNS                       Domain Name System

DTI                        Direct Tunnel Indicator

DTM                      Dual Transfer Mode

EGPRS                  Enhanced GPRS

Em-APN               Emergency Access Point Name

ESP                        Encapsulating Security Payload

GCSI                     GPRS CAMEL Subscription Information indicator

GEA                       GPRS Encryption Algorithm

GERAN                 GSM EDGE Radio Access Network

GGSN                    Gateway GPRS Support Node

GMM/SM             GPRS Mobility Management and Session Management

GPRS‑SSF            GPRS Service Switching Function

GPRS‑CSI            GPRS CAMEL Subscription Information

GRA                      GERAN Registration Area

GSM‑SCF             GSM Service Control Function

GSIM                    GSM Service Identity Module

GSN                       GPRS Support Node

GTP                       GPRS Tunnelling Protocol

GTP‑C                   GTP Control Plane

GTP‑U                   GTP User Plane

ICMP                    Internet Control Message Protocol

IETF                      Internet Engineering Task Force

IK                           Integrity Key

IP                           Internet Protocol

IPv4                       Internet Protocol version 4

IPv6                       Internet Protocol version 6

IPX                        Internet Packet eXchange

ISP                         Internet Service Provider

KSI                        Key Set Identifier

L2TP                     Layer‑2 Tunnelling Protocol

LL‑PDU                LLC PDU

LLC                       Logical Link Control

MAC                     Medium Access Control

MIP                       Mobile IP

MNRF                   Mobile station Not Reachable Flag

MNRG                  Mobile station Not Reachable for GPRS flag

MNRR                  Mobile station Not Reachable Reason

MOCN                  Multi-Operator Core Network

MTP2                    Message Transfer Part layer 2

MTP3                    Message Transfer Part layer 3

NACC                   Network Assisted Cell Change

NGAF                    Non-GPRS Alert Flag

N-PDU                   Network Protocol Data Unit

NRSU                    Network Request Support UE

NRSN                    Network Request Support Network

NS                          Network Service

NSAPI                   Network layer Service Access Point Identifier

NSS                        Network SubSystem

ODB                      Operator Determined Barring

P‑TMSI                 Packet TMSI

PCU                       Packet Control Unit

PDCH                    Packet Data CHannel

PDCP                     Packet Data Convergence Protocol

PDN                       Packet Data Network

PDP                        Packet Data Protocol, e.g. IP

PDU                       Protocol Data Unit

PMM                     Packet Mobility Management

PPF                        Paging Proceed Flag

PPP                        Point-to-Point Protocol

PTP                        Point To Point

PVC                       Permanent Virtual Circuit

RA                         Routeing Area

RAB                      Radio Access Bearer

RAC                      Routeing Area Code

RAI                        Routeing Area Identity

RANAP                 Radio Access Network Application Protocol

RAU                      Routeing Area Update

RLC                       Radio Link Control

RNC                      Radio Network Controller

RNS                       Radio Network Subsystem

RNTI                     Radio Network Temporary Identity

RRC                      Radio Resource Control

SBSC                     Serving Base Station Controller

SBSS                     Serving BSS

SGSN                     Serving GPRS Support Node

SM                         Short Message

SM‑SC                  Short Message service Service Centre

SMS‑GMSC         Short Message Service Gateway MSC

SMS‑IWMSC      Short Message Service Interworking MSC

SN‑PDU                SNDCP PDU

SNDC                    SubNetwork Dependent Convergence

SNDCP                  SubNetwork Dependent Convergence Protocol

SPI                         Security Parameter Index

SRNC                    Serving RNC

SRNS                     Serving RNS

TCAP                    Transaction Capabilities Application Part

TCP                       Transmission Control Protocol

TFT                        Traffic Flow Template

TEID                     Tunnel Endpoint IDentifier

TLLI                      Temporary Logical Link Identity

TOM                      Tunnelling Of Messages

TOS                       Type of Service

TRAU                    Transcoder and Rate Adaptor Unit

UDP                       User Datagram Protocol

UEA                       UMTS Encryption Algorithm

UESBI-Iu             UE Specific Behaviour Information - Iu

UESBI-Uu            UE Specific Behaviour Information - Uu

UIA                        UMTS Integrity Algorithm

URA                      UTRAN Registration Area

USIM                    User Service Identity Module

UTRAN                 UMTS Terrestrial Radio Access Network