3GPP LTE Abbreviations Dictionary.ld2

Info: 1,785 English entries

[ENG]	[REM]
Paging Block Periodicity (PBP)	The period of the occurrence of Paging Blocks. (For FDD, PBP1).
1.8V technology Smart Card	A Smart Card operating at 1.8V ± 10% and 3V ± 10%.
1.8V technology Terminal	A terminal operating the Smart Card - Terminal interface at 1.8V ± 10% and 3V ± 10%.
1xRTT	CDMA2000 1x Radio Transmission Technology
2G	2nd Generation
3G	3rd Generation
3GPP	Third Generation Partnership Project
3GPP Generic User Profile (GUP)	The 3GPP Generic User Profile is the collection of user related data which affects the way in which an individual user experiences services and which may be accessed in a standardised manner.
3GPP system	the telecommunication system standardised by the 3GPP consisting of a core network and a radio access network that may be either GERAN or UTRAN, or both.
3GPP System core network	refers in this specification to an evolved GSM core network infrastructure.
3GPP System coverage	see coverage area.
3GPP System IC Card	An IC card (or 'smartcard') of defined electromechanical specification which contains at least one USIM.
3GPP System mobile termination:	part of the 3GPP System Mobile Station which provides functions specific to the management of the radio interface (Um).
3GPP-WLAN Interworking	Used to generically refer to interworking between the 3GPP system and the WLAN family of standards.
3V technology Smart Card	A Smart Card operating at 3V± 10% and 5V ± 10%.
3V technology Terminal	A terminal operating the Smart Card - Terminal interface at 3V-± 10% and 5V ± 10%.
8-PSK	8-state Phase Shift Keying
A/Gb mode	mode of operation of the MS when connected to the Core Network via GERAN and the A and/or Gb interfaces.
A-MPR	Additional Maximum Power Reduction
A-SGW	Access Signalling Gateway
A3	Authentication algorithm A3
A38	A single algorithm performing the functions of A3 and A8
A5/1	Encryption algorithm A5/1
A5/2	Encryption algorithm A5/2
A5/X	Encryption algorithm A5/0-7
A8	Ciphering key generating algorithm A8
AAL	ATM Adaptation Layer
AAL2	ATM Adaptation Layer type 2
AAL5	ATM Adaptation Layer type 5
AB	Access Burst
AC	Access Class (of the USIM)Alternating CurrentAccess Class (C0 to C15)Access ConditionApplication ContextAuthentication Centre
ACC	Automatic Congestion Control
Acceptable Cell	A cell that the UE may camp on to make emergency calls. It must satisfy certain conditions.
Access conditions	A set of security attributes associated with a file.
Access delay	The value of elapsed time between an access request and a successful access (source ITU-T X.140).
Access Stratum SDU (Service Data Unit)	Unit of data transferred over the access stratum SAP (Service Access Point) in the Core Network or in the User Equipment.
ACCH	Associated Control Channel
ACELP	Algebraic Code Excited Linear Prediction
ACIR	Adjacent Channel Interference Ratio
ACK	AcknowledgementAcknowledgement (in HARQ protocols)
ACL	APN Control List
ACLR	Adjacent Channel Leakage RatioAdjacent Channel Leakage Power Ratio
ACM	Accumulated Call MeterAddress Complete Message
ACMmax	ACM (Accumulated Call Meter) maximal value
ACRR	Adjacent Channel Rejection Ratio
ACS	Adjacent Channel Selectivity
ACU	Antenna Combining Unit
ADC	Administration CentreAnalogue to Digital Converter
ADCH	Associated Dedicated CHannel
ADF	Application Dedicated File
ADM	Access condition to an EF which is under the control of the authority which creates this file
ADN	Abbreviated Dialling Numbers
ADPCM	Adaptive Differential Pulse Code Modulation
AE	Application Entity
AEC	Acoustic Echo Control
AEF	Additional Elementary Functions
AESA	ATM End System Address
AFC	Automatic Frequency Control
AGCH	Access Grant CHannel
aGW	Access Gateway
AI	Acquisition Indicator
Ai	Action indicator
AICH	Acquisition Indicator Channel
AID	Application IDentifier
AIUR	Air Interface User Rate
AK	Anonymity Key
AKA	Authentication and Key Agreement
AKI	Asymmetric Key Index
ALCAP	Access Link Control Application Protocol
ALSI	Application Level Subscriber Identity
ALW	ALWays
AM	Acknowledged ModeAcknowledge Mode
AMBR	Aggregate Maximum Bit Rate
AMD	AM Data
AMF	Authentication Management Field
AMN	Artificial Mains Network
AMR	Adaptive Multi Rate
AMR-WB	Adaptive Multi Rate Wide Band
AN	Access Network
ANP	Access Network Provider
ANR	Automatic Neighbour Relation
AoC	Advice of Charge
AoCC	Advice of Charge Charging
AoCI	Advice of Charge Information
AP	Application ProtocolAccess preamble
APDU	Application Protocol Data Unit
API	Application Programming Interface
APN	Access Point Name
ARFCN	Absolute Radio Frequency Channel Number
ARP	Address Resolution Protocol
ARQ	Automatic Repeat Request
ARR	Access Rule Reference
AS	Access Stratum
ASC	Access Service Class
ASCI	Generic name to identify the services VGCS, VBS and eMLPP.Advanced Speech Call Items
ASE	Application Service Element
ASME	Access Security Management Entity
ASN.1	Abstract Syntax Notation.1Abstract Syntax Notation One
AT command	ATtention Command
ATM	Asynchronous Transfer Mode
ATR	Answer To Reset
ATT (flag)	Attach
AU	Access Unit
AuC	Authentication Centre
AUT(H)	Authentication
Authentication	A property by which the correct identity of an entity or party is established with a required assurance. The party being authenticated could be a user, subscriber, home environment or serving network.
AUTN	Authentication token
Available PLMN	A PLMN where the UE has found a cell that satisfies certain conditions.
Average power	The thermal power as measured through a root raised cosine filter with roll-off ??= 0.22 and a bandwidth equal to the chip rate of the radio access mode. The period of measurement shall be one power control group (timeslot) unless otherwise stated.
AWGN	Additive White Gaussian Noise
B-ISDN	Broadband ISDN
BA	BCCH Allocation
BAIC	Barring of All Incoming Calls
BAOC	Barring of All Outgoing Calls
Base Station	A base station is a network element in radio access network responsible for radio transmission and reception in one or more cells to or from the user equipment. A base station can have an integrated antenna or be connected to an antenna by feeder cables. In UTRAN it terminates the Iub interface towards the RNC. In GERAN it terminates the Abis interface towards the BSC.
Base Station Controller	This equipment in the BSS is in charge of controlling the use and the integrity of the radio resources.
Base Station Subsystem	Either a full network or only the access part of a GERAN offering the allocation, release and management of specific radio resources to establish means of connection between an MS and the GERAN.A Base Station Subsystem is responsible for the resources and transmission/reception in a set of cells.
Baseline capabilities	Capabilities that are required for a service-less UE to operate within a network. The baseline capabilities for a UE include the capabilities to search for, synchronise with and register (with authentication) to a network. The negotiation of the UE and the network capabilities, as well as the maintenance and termination of the registration are also part of the required baseline capabilities.
Baseline Implementation Capabilities	Set of Implementation capabilities, in each technical domain, required to enable a UE to support the required Baseline capabilities.
Basic telecommunication service	This term is used as a common reference to both bearer services and teleservices.
BCC	Base Transceiver Station (BTS) Colour Code
BCCH	Broadcast Control Channel
BCD	Binary Coded Decimal
BCF	Base station Control Function
BCFE	Broadcast Control Functional Entity
BCH	Broadcast Channel
BCIE	Bearer Capability Information Element
BDN	Barred Dialling Number
Bearer	A information transmission path of defined capacity, delay and bit error rate, etc.
Bearer capability	A transmission function which the UE requests to the network.
Bearer independent protocol	(UICC) Mechanism by which the ME provides the (U)SIM applications on the UICC with access to the data bearers supported by the ME and the network.
Bearer service	A type of telecommunication service that provides the capability of transmission of signals between access points.
BER	Bit Error RatioBasic Encoding Rules (of ASN.1)
Best effort QoS	The lowest of all QoS traffic classes. If the guaranteed QoS cannot be delivered, the bearer network delivers the QoS which can also be called best effort QoS.
Best effort service	A service model which provides minimal performance guarantees, allowing an unspecified variance in the measured performance criteria.
BFI	Bad Frame Indication
BG	Border Gateway
BGT	Block Guard Time
BI	all Barring of Incoming call
BIC	Baseline Implementation Capabilities
BIC-Roam	Barring of Incoming Calls when Roaming outside the home PLMN country
BID	Binding Identity
Billing	A function whereby CDRs generated by the charging function are transformed into bills requiring payment.
BLER	Block Error Ratio
Bm	Full-rate traffic channel
BMC	Broadcast/Multicast Control
BN	Bit Number
BO	all Barring of Outgoing call
BOC	Bell Operating Company
BOIC	Barring of Outgoing International Calls
BOIC-exHC	Barring of Outgoing International Calls except those directed to the Home PLMN Country
BPSK	Binary Phase Shift Keying
Broadcast	A value of the service attribute 'communication configuration', which denotes unidirectional distribution to all users (source ITU-T I.113).
BS	Base StationBase StationBasic Service (group)Bearer Service
BSC	Base Station Controller
BSG	Basic Service Group
BSIC	Base transceiver Station Identity Code
BSIC-NCELL	BSIC of an adjacent cell
BSR	Buffer Status Reports
BSS	Base Station Subsystem
BSSAP	Base Station Subsystem Application Part
BSSGP	Base Station Subsystem GPRS Protocol
BSSMAP	Base Station Subsystem Management Application Part
BSSOMAP	Base Station Subsystem Operation and Maintenance Application Part
BTFD	Blind Transport Format Detection
BTS	Base Transceiver Station
BVC	BSS GPRS Protocol Virtual Connection
BVCI	BSS GPRS Protocol Virtual Connection Identifier
BWT	Block Waiting Time
Byte code	(UICC) A hardware machine independent representation of a primitive computer operation that serves as an instruction to a software program called an interpreter or a virtual machine that simulates the hypothetical computer’s central processing unit. code generated by a Java compiler and executed by the Java interpreter.
C	Conditional
C-	Control-
C-APDU	Command APDU
C/I	Carrier-to-Interference Power Ratio
C-plane	Control Plane
C/R	Command/Response field bit
C-RNTI	Cell RNTICell Radio Network Temporary Identity
C-TPDU	Command TPDU
CA	Capacity Allocation Cell AllocationCertification Authority
CAA	Capacity Allocation Acknowledgement
Cable, Connector, and Combiner Losses (Transmitter) (dB)	The combined losses of all transmission system components between the transmitter output and the antenna input (all losses in positive dB values).
Cable, Connector, and Splitter Losses (Receiver) (dB)	The combined losses of all transmission system components between the receiving antenna output and the receiver input.
CAC (Connection Admission Control)	A set of measures taken by the network to balance between the QoS requirements of new connections request and the current network utilisation without affecting the grade of service of existing/already established connections.
CAD	Card Acceptance Device
CAI	Charge Advice Information
Call	a logical association between several users (this could be connection oriented or connection less).
CAMEL	Customised Application for Mobile network Enhanced Logic
Camped on a cell	The UE is in idle mode and has completed the cell selection/reselection process and has chosen a cell. The UE monitors system information and (in most cases) paging information. Note that the services may be limited, and that the PLMN may not be aware of the existence of the UE within the chosen cell.
CAP	CAMEL Application Part
Capability Class	A piece of information which indicates general 3GPP System mobile station characteristics (e.g. supported radio interfaces,…) for the interest of the network.
Card session	A link between the card and the external world starting with the ATR and ending with a subsequent reset or a deactivation of the card.
CAZAC	Constant Amplitude Zero Auto-Correlation
CB	Cell Broadcast
CBC	Cell Broadcast Centre Cipher Block Chaining
CBCH	Cell Broadcast CHannel
CBMI	Cell Broadcast Message Identifier
CBR	Constant Bit Rate
CBS	Cell Broadcast Service
CBS DRX cycle	The time interval between successive readings of BMC messages.
CC	Call ControlCountry CodeCryptographic Checksum
CC/PP	Composite Capability/Preference Profiles
CCBS	Completion of Calls to Busy Subscriber
CCCH	Common Control Channel
CCE	Control Channel Element
ccess protocol	A defined set of procedures that is adopted at an interface at a specified reference point between a user and a network to enable the user to employ the services and/or facilities of that network (source ITU-T I.112).
CCF	Call Control Function
CCH	Control Channel
CCI	Capability / Configuration Identifier
CCITT	Comité Consultatif International Télégraphique et Téléphonique (The International Telegraph and Telephone Consultative Committee)
CCK	Corporate Control Key
CCM	Certificate Configuration MessageCurrent Call Meter
CCO	Cell Change Order
ccounting	The process of apportioning charges between the Home Environment, Serving Network and User.
CCP	Capability/Configuration Parameter
CCPCH	Common Control Physical Channel
Cct	Circuit
CCTrCH	Coded Composite Transport Channel
ccuracy	A performance criterion that describes the degree of correctness with which a function is performed. (The function may or may not be performed with the desired speed.) (source ITU-T I.350).
CD	Capacity Deallocation Collision Detection
CDA	Capacity Deallocation Acknowledgement
CDCH	Control-plane Dedicated CHannel
CDD	Cyclic Delay Diversity
CDMA	Code Division Multiple Access
CDN	Coupling/Decoupling Network
CDR	Charging Data Record
CDUR	Chargeable DURation
CED	called station identifier
CEIR	Central Equipment Identity Register
Cell	Radio network object that can be uniquely identified by a User Equipment from a (cell) identification that is broadcasted over a geographical area from one UTRAN Access Point. A Cell is either FDD or TDD mode.
Cell Radio Network Temporary Identifier (C-RNTI)	The C-RNTI is a UE identifier allocated by a controlling RNC and it is unique within one cell controlled by the allocating CRNC. C-RNTI can be reallocated when a UE accesses a new cell with the cell update procedure.
Cellular Text telephone Modem (CTM)	A modulation and coding method intended for transmission of text in voice channels for the application of real time text conversation.
CEND	end of charge point
CEPT	Conférence des administrations Européennes des Postes et Telecommunications
CF	Conversion Facilityall Call Forwarding services
CFB	Call Forwarding on mobile subscriber Busy
CFI	Control Format Indicator
CFN	Connection Frame Number
CFNRc	Call Forwarding on mobile subscriber Not Reachable
CFNRy	Call Forwarding on No Reply
CFU	Call Forwarding Unconditional
CGI	Common Gateway InterfaceCell Global Identifier
CHAP	Challenge Handshake Authentication Protocol
Chargeable Event	An activity utilising telecommunications network infrastructure and related services for user to user communication (e.g. a single call, a data communication session or a short message), or for user to network communication (e.g. service profile administration), or for inter-network communication (e.g. transferring calls, signalling, or short messages), or for mobility (e.g. roaming or inter-system handover), which the network operator wants to charge for. The cost of a chargeable event may cover the cost of sending, transporting, delivery and storage. The cost of call related signalling may also be included.
Charged Party	A user involved in a chargeable event who has to pay parts or the whole charges of the chargeable event, or a third party paying the charges caused by one or all users involved in the chargeable event, or a network operator.
Charging	A function whereby information related to a chargeable event is formatted and transferred in order to make it possible to determine usage for which the charged party may be billed.
Charging Data Record (CDR)	A formatted collection of information about a chargeable event (e.g. time of call set-up, duration of the call, amount of data transferred, etc) for use in billing and accounting. For each party to be charged for parts of or all charges of a chargeable event a separate CDR shall be generated, i.e more than one CDR may be generated for a single chargeable event, e.g. because of its long duration, or because more than one charged party is to be charged.
CHP	CHarging Point
CHV	Card Holder Verification information
CI	Cell IdentityCUG index
CID	Context Identifier
CIM	Common Information Model
Cipher key	A code used in conjunction with a security algorithm to encode and decode user and/or signalling data.
CIR	Carrier to Interference Ratio
CK	Cipher Key
CKSN	Ciphering Key Sequence Number
CLA	CLAss
CLI	Calling Line Identity
CLIP	Calling Line Identification Presentation
CLIR	Calling Line Identification Restriction
CLK	Clock
CLNP	Connectionless network protocol
CLNS	Connectionless network service
Closed group	A group with a pre-defined set of members. Only defined members may participate in a closed group.
Closed Subscriber Group (CSG)	A Closed Subscriber Group identifies subscribers of an operator who are permitted to access one or more cells of the PLMN but which have restricted access (CSG cells).
CM	Connection Management
CMC	Connection Mobility Control
CMD	Command
CMIP	Common Management Information Protocol
CMISE	Common Management Information Service
CMM	Channel Mode Modify
CN	Core NetworkCore NetworkComfort Noise
CNAP	Calling Name Presentation
CNG	Calling Tone
CNL	Co-operative Network List
CNTR	Counter
Coded Composite Transport Channel	A data stream resulting from encoding and multiplexing of one or several transport channels.
COLI	COnnected Line Identity
COLP	COnnected Line identification Presentation
COLR	COnnected Line identification Restriction
COM	COMplete
Common Channel	A Channel not dedicated to a specific UE.
Confidentiality	The avoidance of disclosure of information without the permission of its owner.
CONNACK	Connect Acknowledgement
Connected Mode	Connected mode is the state of User Equipment switched on and an RRC connection established.
Connection	A communication channel between two or more end-points (e.g. terminal, server etc.).
Connection mode	The type of association between two points as required by the bearer service for the transfer of information. A bearer service is either connection-oriented or connectionless. In a connection oriented mode, a logical association called connection needs to be established between the source and the destination entities before information can be exchanged between them. Connection oriented bearer services lifetime is the period of time between the establishment and the release of the connection. In a connectionless mode, no connection is established beforehand between the source and the destination entities; the source and destination network addresses need to be specified in each message. Transferred information cannot be guaranteed of ordered delivery. Connectionless bearer services lifetime is reduced to the transport of one message.
Connectionless (for a bearer service)	In a connectionless bearer, no connection is established beforehand between the source and the destination entities ; the source and destination network addresses need to be specified in each message. Transferred information cannot be guaranteed of ordered delivery. Connectionless bearer services lifetime is reduced to the transport of one message.
Connectionless service	A service which allows the transfer of information among service users without the need for end-to-end call establishment procedures (source ITU-T I.113).
CONS	Connection-oriented network service
Control channel	A logical channel that carries system control information.
Controlling RNC	A role an RNC can take with respect to a specific set of UTRAN access points. There is only one Controlling RNC for any UTRAN access point. The Controlling RNC has the overall control of the logical resources of its UTRAN access point's.
Conversational service	An interactive service which provides for bi-directional communication by means of real-time (no store-and-forward) end-to-end information transfer from user to user (source ITU-T I.113).
CORBA	Common Object Request Broker Architecture
Core network	An architectural term relating to the part of 3GPP System which is independent of the connection technology of the terminal (eg radio, wired).
Core Network Operator	Operator that offers core network services.
Corporate code	Code which when combined with the network and SP codes refers to a unique Corporate. The code is provided in the GID2 file on the (U)SIM (see Annex A.1.) and is correspondingly stored on the ME.Corporate code group combination of the Corporate code and the associated SP and network codes.
Corporate personalisation	Allows a corporate customer to personalise MEs that he provides for his employees or customers use so that they can only be used with the company's own (U)SIMs.
Coverage area	Area over which a 3GPP System service is provided with the service probability above a certain threshold.
Coverage area (of a mobile cellular system)	An area where mobile cellular services are provided by that mobile cellular system to the level required of that system.
CP	Control PlaneCyclic Prefix
CP-Admin	Certificate Present (in the MExE SIM)-Administrator
CP-TP	Certificate Present (in the MExE SIM)-Third Party
CPBCCH	COMPACT Packet BCCH
CPCH	Common Packet Channel
CPCS	Common Part Convergence Sublayer
CPICH	Common Pilot Channel
CPS	Common Part Sublayer
CPU	Central Processing Unit
CQI	Channel Quality Indicator
CRC	Cyclic Redundancy Check
CRE	Call Ree-establishment procedure
CRNC	Controlling Radio Network Controller
CS	Circuit SwitchedCircuit SwitchedCoding Scheme
CS-GW	Circuit Switched Gateway
CSCF	Call Server Control Function
CSD	Circuit Switched Data
CSE	Camel Service Environment
CSG	Closed Subscriber Group
CSG cell	A cell, part of the PLMN, broadcasting a specific CSG Identity. A CSG cell is accessible by the members of the closed subscribers group for that CSG Identity. All the CSG cells sharing the same identity are identifiable as a single group.
CSG Identity (CSGID)	An identity broadcast by a CSG cell or cells and used by the UE to facilitate access for authorised members of the associated Closed Subscriber Group.
CSG Indicator	An indication transmitted on the broadcast channel of the CSG cell that allows the UE to identify such as CSG cell.
CSG manager	A CSG manager can, under the operator's supervision, add, remove and view the list of CSG members.
CSGID	Closed Subscriber Group IDentity
CSPDN	Circuit Switched Public Data Network
CT	Call Transfer supplementary serviceChannel TesterChannel Type
CTCH	Common Traffic Channel
CTDMA	Code Time Division Multiple Access
CTFC	Calculated Transport Format Combination
ctive communication	a UE is in active communication when it has a CS connection established. For PS active communication is defined by the existence of one or more Activated PDP contexts. Either one or both of the mentioned active communications may occur in the UE.
ctive Set	Set of radio links simultaneously involved in a specific communication service between an UE and a UTRAN access point.
CTM	Cellular Text telephone Modem
CTR	Common Technical Regulation
CTS	Cordless Telephony System
CUG	Closed User Group
Current directory	The latest MF or DF selected on the UICC.
Current EF	The latest EF selected.
Current serving cell	This is the cell on which the MS is camped.
CW	Continuous WaveCall WaitingContinuous Wave (unmodulated signal)
CWI	Character Waiting Integer
CWT	Character Waiting Time
DAC	Digital to Analog Converter
DAD	Destination ADress
DAI	Downlink Assignment Index
DAM	DECT Authentication Module
Data field	Obsolete term for Elementary File.
Data Object	Information coded as TLV objects, i.e. consisting of a Tag, a Length and a Value part.
DB	Dummy Burst
DC	Direct CurrentDedicated Control (SAP)
DCA	Dynamic Channel Allocation
DCCH	Dedicated Control Channel
DCE	Data Circuit terminating Equipment
DCF	Data Communication Function
DCH	Dedicated Channel
DCI	Downlink Control Information
DCK	Depersonalisation Control Key
DCN	Data Communication Network
DCS	Data Coding Scheme
DCS1800	Digital Cellular Network at 1800MHz
DDI	Direct Dial In
De-personalisation	Is the process of deactivating the personalisation so that the ME ceases to carry out the verification checks.
DECT	Digital Enhanced Cordless Telecommunications
Dedicated Channel	A channel dedicated to a specific UE.
Dedicated File (DF)	A file containing access conditions and, optionally, Elementary Files (EFs) or other Dedicated Files (DFs).
Delivered QoS	Actual QoS parameter values with which the content was delivered over the lifetime of a QoS session.
Demand service	A type of telecommunication service in which the communication path is established almost immediately, in response to a user request effected by means of user-network signalling (source ITU-T I.112).
Dependability	A performance criterion that describes the degree of certainty (or surety) with which a function is performed regardless of speed or accuracy, but within a given observational interval (source ITU-T I.350).
DES	Data Encryption Standard
Destination user	Entity to which calls to the General Packet Radio Service (GPRS) are directed.
DET	Detach
DF	Dedicated File
DFT	Discrete Fourier Transformation
DFTS	DFT Spread OFDM
DHCP	Dynamic Host Configuration Protocol
DHO	Diversity Handover
diff-serv	Differentiated services
Directory	General term for the MF or a DF on the UICC.
Directory Number	A string consisting of one or more of the characters from the set {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, *, #, a, b, c} associated with a nature of address indicator and number plan indicator. When using the public MMI for the control of supplementary services however, * and # cannot be part of any SC or SI field.
DISC	Disconnect
Distribution service	Service characterised by the unidirectional flow of information from a given point in the network to other (multiple) locations (source ITU-T I.113).
djacent Channel Leakage power Ratio (ACLR)	The ratio of the average power centered on the assigned channel frequency to the average power centered on an adjacent channel frequency. In both cases the average power is measured with a filter that has Root Raised Cosine (RRC) filter response with roll-off ??= 0.22 and a bandwidth equal to the chip rate.
DL	DownlinkData LayerDownlink (Forward Link)
DL-SCH	Downlink Shared ChannelDL-Shared CHannel
DLCI	Data Link Connection Identifier
DLD	Data Link Discriminator
Dm	Control channel (ISDN terminology applied to mobile service)
DMR	Digital Mobile Radio
DMTF	Distributed Management Task Force
DN	Destination Network
DNIC	Data Network Identifier
DNS	Directory Name Service
DO	Data Object
Domain	The highest-level group of physical entities. Reference points are defined between domains.
Domain Specific Access Control	Access control functionality for access barring in either domain (i.e. CS domain or PS domain).
Donor network	The subscription network from which a number is ported in the porting process. This may or may not be the number range owner network.
Downlink	Unidirectional radio link for the transmission of signals from a UTRAN access point to a UE. Also in general the direction from Network to UE.
DP	Dial/Dialled Pulse
DPCCH	Dedicated Physical Control Channel
DPCH	Dedicated Physical Channel
DPDCH	Dedicated Physical Data Channel
DRAC	Dynamic Resource Allocation Control
DRB	(user) Data Radio BearerData Radio Bearer carrying user plane dataData Radio Bearer
Drift RNS	The role an RNS can take with respect to a specific connection between a UE and UTRAN. An RNS that supports the Serving RNS with radio resources when the connection between the UTRAN and the User Equipment need to use cell(s) controlled by this RNS is referred to as Drift RNS.
DRNC	Drift Radio Network Controller
DRNS	Drift RNS
DRX	Discontinuous Reception
DS-CDMA	Direct-Sequence Code Division Multiple Access
DSAC	Domain Specific Access Control
DSCH	Downlink Shared Channel
DSE	Data Switching Exchange
DSI	Digital Speech Interpolation
DSS1	Digital Subscriber Signalling No1
DTAP	Direct Transfer Application Part
DTCH	Dedicated Traffic Channel
DTE	Data Terminal Equipment
DTMF	Dual Tone Multiple Frequency
DTX	Discontinuous Transmission
DwPTS	Downlink Pilot Time SlotDownlink part of the special subframe (for TDD operation)
E	Extension bit
E-AV	EPS authentication vector
E-GGSN	Enhanced GGSN
E-HLR	Enhanced HLR
E-RAB	E-UTRAN Radio Access Bearer
E-UTRA	Evolved UTRAEvolved Universal Terrestrial Radio AccessEvolved UMTS Terrestrial Radio Access
E-UTRAN	Evolved UTRANEvolved Universal Terrestrial Radio Access NetworkEvolved UMTS Terrestrial Radio Access Network
EA	External Alarms
EARFCN	E-UTRA Absolute Radio Frequency Channel Number
EBSG	Elementary Basic Service Group
Ec/No	Ratio of energy per modulating bit to the noise spectral density
ECB	Electronic Code-book
ECC	Emergency Call CodeElliptic Curve Cryptography
ECGI	E-UTRAN Cell Global Identifier
ECM	EPS Connection ManagementError Correction Mode (facsimile)
ECSD	Enhanced CSD
ECT	Explicit Call Transfer supplementary service
ECTRA	European Committee of Telecommunications Regulatory Affairs
EDC	Error Detection Code byte
EDGE	Enhanced Data rates for GSM Evolution
EEC	Ethernet Equipment Clock
EEL	Electric Echo Loss
EF	Elementary File (on the UICC)Elementary File
EFR	Enhanced Full Rate
EFS	Error free seconds
EGPRS	Enhanced GPRS
EHPLMN	Equivalent Home PLMN
EIR	Equipment Identity CentreEquipment Identity Register
EIRP	Equivalent Isotropic Radiated Power
EL	Echo Loss
Element Management Functions	Set of functions for management of network elements on an individual basis. These are basically the same functions as supported by the corresponding local terminals.
Element Manager	Provides a package of end-user functions for management of a set of closely related types of network elements. These functions can be divided into two main categories.
Elementary File (EF)	A file containing access conditions and data and no other files on the UICC.
EM	Element Manager
EMC	Electromagnetic Compatibility
eMLPP	enhanced Multi-Level Precedence and Pre-emption
EMM	EPS Mobility Management
EMMI	Electrical Man Machine Interface
ENB	Evolved Node B
eNB	E-UTRAN Node BE-UTRAN NodeBEvolved Node-B
End-User	An End-User is an entity (typically a user), associated with one or multiple subscriptions through identities (e.g. IMSIs, MSISDNs, IMPIs, IMPUs and application-specific identities). In the 3GPP system an End-User is characterised by an End-User Identity.
End-User Identity (EUI)	An End-User Identity is an identity that uniquely characterises an End-User in the 3GPP system. An End-User Identity is mainly intended for administration purposes of the operator.
eNode-B	Evolved Node B
Enterprise Systems	Information Systems that are used in the telecommunication organisation but are not directly or essentially related to the telecommunications aspects (Call Centre's, Fraud Detection and Prevention Systems, Invoicing etc).
EP	Elementary Procedure
EPA	Extended Pedestrian A model
EPC	Evolved Packet CoreEnhanced Packet CoreEnhanced Power ControlEvolved Packet Core
EPCCH	Enhanced Power Control Channel
EPRE	Energy Per Resource Element
EPROM	Erasable Programmable Read Only Memory
EPS	Evolved Packet SystemEnhanced Packet System
Equivalent HPLMN	Any of the PLMN entries contained in the Equivalent HPLMN list.
Equivalent HPLMN list	To allow provision for multiple HPLMN codes, PLMN codes that are present within this list shall replace the HPLMN code derived from the IMSI for PLMN selection purposes. This list is stored on the USIM and is known as the EHPLMN list. The EHPLMN list may also contain the HPLMN code derived from the IMSI. If the HPLMN code derived from the IMSI is not present in the EHPLMN list then it shall be treated as a Visited PLMN for PLMN selection purposes.
ERP	Ear Reference PointEquivalent Radiated Power
ERR	Error
ESD	Electrostatic discharge
ESM	EPS Session Management
Essential UE Requirement (Conditional)	Requirement which has to be implemented under certain Service conditions. e.g. AMR codec in UE which supports speech service
Essential UE Requirement (Unconditional)	Requirement which has to be implemented in any 3G UE in order to exist in and communicate with 3G network (e.g. Chiprate of 3.84Mcps).
ETNS	European Telecommunications Numbering Space
ETR	ETSI Technical Report
ETS	European Telecommunication Standard
ETSI	European Telecommunications Standards Institute
ETU	Extended Typical Urban model
etu	elementary time unit
ETWS	Earthquake and Tsunami Warning System
EUI	End-User Identity
EUT	Equipment Under Test
EUTRAN	Evolved UMTS Terrestrial Radio Access Network
EVA	Extended Vehicular A model
EVM	Error Vector Magnitude
Evolved Packet Core	Is a framework for an evolution or migration of the 3GPP system to a higher-data-rate, lower-latency, packet-optimized system that supports, multiple RATs.
Evolved Packet System	Is an evolution of the 3G UMTS characterized by higher-data-rate, lower-latency, packet-optimized system that supports multiple RATs. The Evolved Packet System comprises the Evolved Packet Core together with the evolved radio access network (E-UTRA and E-UTRAN).
Evolved UTRA	Evolved UTRA is an evolution of the 3G UMTS radio-access technology towards a high-data-rate, low-latency and packet-optimized radio-access technology.
Evolved UTRAN	Evolved UTRAN is an evolution of the 3G UMTS radio-access network towards a high-data-rate, low-latency and packet-optimized radio-access network.
Explicit Diversity Gain (dB)	The effective gain achieved using diversity techniques.
Extra SDU delivery probability	The ratio of total (unrequested) extra service data units (SDUs) to total service data units received by a destination user in a specified sample (source ITU-T X.140).
FA	Full AllocationFax Adaptor
FAC	Final Assembly Code
FACCH	Fast Associated Control CHannel
FACCH/F	Fast Associated Control Channel/Full rate
FACCH/H	Fast Associated Control Channel/Half rate
FACH	Forward Access Channel
FAUSCH	Fast Uplink Signalling Channel
FAX	Facsimile
FB	Frequency correction Burst
FBI	Feedback Information
FC (Flow Control)	A set of mechanisms used to prevent the network from becoming overloaded by regulating the input rate transmissions.
FCCH	Frequency Correction CHannel
FCI	File Control Information
FCP	File Control Parameter
FCS	Frame Check Sequence
FDD	Frequency Division DuplexFrequency Division Duplexing
FDM	Frequency Division MultiplexingFrequency Division Multiplex
FDMA	Frequency Division Multiple Access
FDN	Fixed Dialling Number
FDR	False transmit format Detection Ratio
FEC	Forward Error Correction
FER	Frame Erasure Rate, Frame Error Rate
FFS	For Further Study
FFT	Fast Fourier Transformation
FH	Frequency Hopping
FI	Framing Info
File	A named and hierarchically-classified data set on the UICC.
File identifier (FID)	The 2-byte name of a file or a directory on the UICC.
Fixed Mobile Convergence (FMC)	In a given network configuration, the capabilities that provide service and application to the end-user irrespective of the fixed or mobile access technologies and independent of user's location. In the NGN environment, it means to provide NGN services to end-users regardless of the access technology.
Fixed Network User Rate	The user rate between IWF and the fixed network.
Flexible Layer One (FLO)	GERAN feature that allows the channel coding of the layer one to be configured at call setup.
FLO	Flexible Layer One
FLOOR	Mathematical function used to ‘round down’ i.e. to the nearest integer having a lower value
FM	Fault Management
FMC	Fixed Mobile Convergence
FMS	First missing PDCP SN
FN	Frame Number
FNUR	Fixed Network User Rate
FP	Frame Protocol
FPLMN	Forbidden PLMN
FR	Full Rate
Framework	A framework defines a set of Application Programming Interface (API) classes for developing applications and for providing system services to those applications.
FRC	Fixed Reference Channel
FTAM	File Transfer Access and Management
ftn	forwarded-to number
Functional group	A set of functions that may be performed by a single equipment (source ITU-T I.112).
G-RNTI	GERAN Radio Network Temporary Identity
GBR	Guaranteed Bit Rate
GC	General Control (SAP)
GCR	Group Call Register
Geographical routing	The conversion of the PDU’s geographical area definition, which specifies the area in which the PDU will be broadcast, into an equivalent radio coverage map.
GERAN	GSM/EDGE Radio Access NetworkGSM EDGE Radio Access Network
GERAN Radio Network Temporary Identifier (G-RNTI)	G-RNTI is an MS identifier which is allocated by the Serving BSC and is unique within this SBSC. It is allocated for all MSs having an RRC connection. The G-RNTI is always reallocated when the Serving BSC for the RRC connection is changed and deallocated when the RRC connection is released. The G-RNTI is also used at RLC/MAC during contention resolution.
GGSN	Gateway GPRS Support Node
GID1	Group Identifier (level 1)
GID2	Group Identifier (level 2)
GMLC	Gateway Mobile Location Centre
GMM	GPRS Mobility Management
GMSC	Gateway MSC
GMSK	Gaussian Minimum Shift Keying
GNSS	Global Navigation Satellite System
GP	Guard PeriodGuard Period (for TDD operation)
GPA	GSM PLMN Area
GPRS	General Packet Radio Service
GPRS MS	An MS capable of GPRS services is a GPRS MS.
GRA	GERAN Registration Area
Group	A set of members allowed to participate in the group call service. The group is defined by a set of rules that identifies a collection of members implicitly or explicitly. These rules may associate members for the purpose of participating in a group call, or may associate members who do not participate in data transfer but do participate in management, security, control, or accounting for the group.
Group call	The relationship that exists between the members of a group for the purpose of transferring data. More than one group call may exist in a group. A group call establishes an active group.
Group call initiator	A member (or third party) authorised to initiate a group call. More than one member may initiate group calls.
Group call participant	A member of a group participating in a particular group call at a given time.
Group call server	A logical entity that provides the group call service to the members.
Group call service	A PTM service in which a relationship exists between participants of the group, and in which a single data unit transmitted by a source participant is received by multiple destination participants; it is a one-in, many-out service.
Group controller	The member (or third party) responsible for the group creation and membership control.
GSA	GSM System Area
GSIM	GSM Service Identity Module
GSM	Global System for Mobile CommunicationsGlobal System for Mobile communication
GSM BSS	refers in this specification to the GSM/GPRS access network.
GSM core network	refers in this specification to the GSM NSS and GPRS backbone infrastructure.
GSM coverage	an area where mobile cellular services are provided in accordance with GSM standards
GSM/EDGE Radio Access Network	GERAN is a conceptual term identifying that part of the network which consists of BSCs and BTSs between A/Gb or Iu and Um interfaces.
GSM session	That part of the card session dedicated to the GSM operation.
GSN	GPRS Support Nodes
GT	Global Title
GTP	GPRS Tunnelling ProtocolGTP Tunneling ProtocolGPRS Tunneling Protocol
GTP-U	GPRS Tunnelling Protocol for User Plane
GTT	Global Text Telephony
Guaranteed service	A service model which provides highly reliable performance, with little or no variance in the measured performance criteria.
GUMMEI	Globally Unique MME Identifier
GUP	3GPP Generic User Profile
GUTI	Globally Unique Temporary Identity
H-CSCF	Home CSCF
HANDO	Handover
Handoff Gain/Loss (dB)	This is the gain/loss factor (+ or -) brought by handoff to maintain specified reliability at the cell boundary.
Handover	The transfer of a user’s connection from one radio channel to another (can be the same or different cell).The process in which the radio access network changes the radio transmitters or radio access mode or radio system used to provide the bearer services, while maintaining a defined bearer service QoS.
Hard Handover	Hard handover is a category of handover procedures where all the old radio links in the UE are abandoned before the new radio links are established.
HARQ	Hybrid Automatic Repeat RequestHybrid ARQ
HCS	Hierarchical Cell Structure
HD-FDD	Half- Duplex FDD
HDLC	High Level Data Link Control
HE	Home Environment
HE-VASP	Home Environment Value Added Service Provider. This is a VASP that has an agreement with the Home Environment to provide services. The Home Environment provides services to the user in a managed way, possibly by collaborating with HE-VASPs, but this is transparent to the user. The same service could be provided by more than one HE-VASP and each HE-VASP can provide more than one service.Home Environment Value Added Service Provider
HF	Human Factors
HFN	Hyper Frame NumberHyperFrame Number
HHO	Hard Handover
HI	HARQ indicator
HLC	High Layer Compatibility
HLR	Home Location Register
HN	Home Network
HNB Name	The HNB Name is a broadcast string in free text format that provides a human readable name for the Home NodeB/eNodeB.
HO	Handover
HOLD	Call hold
Home Environment	responsible for overall provision and control of the Personal Service Environment of its subscribers.
Home PLMN	This is a PLMN where the MCC and MNC of the PLMN identity match the MCC and MNC of the IMSI. Matching criteria are defined in TS 23.122.
HPLMN	Home PLMNHome Public Land Mobile Network
HPS	Handover Path Switching
HPU	Hand Portable Unit
HR	Half Rate
HRPD	High Rate Packet DataCDMA2000 High Rate Packet Data
HRR	Handover Resource Reservation
HSCSD	High Speed Circuit Switched Data
HSDPA	High Speed Downlink Packet Access
HSN	Hopping Sequence Number
HSS	Home Subscriber Server
HTTP	Hyper Text Transfer Protocol
HTTPS	Hyper Text Transfer Protocol Secure (https is http/1.1 over SSL, i.e. port 443)
HU	Home Units
I	Information frames (RLP)
I-Block	Information Block
I-ETS	Interim European Telecommunications Standard
I/O	Input/Output
I-WLAN	Interworking WLAN
IA	Incoming Access (closed user group SS)
IAM	Initial Address Message
IC	Integrated CircuitInterlock Code (CUG SS)
IC Card	A card holding an Integrated Circuit containing subscriber, end user, authentication and/or application data for one or more applications.
IC card SIM	Obsolete term for ID1 SIM.
IC(pref)	Interlock Code of the preferential CUG
ICB	Incoming Calls Barred (within the CUG)
ICC	Integrated Circuit Card
ICCID	Integrated Circuit Card IDentification
ICGW	Incoming Call Gateway
ICI	Incoming Call Information
ICIC	Inter-Cell Interference Coordination
ICM	In-Call Modification
ICMP	Internet Control Message Protocol
ICS	In-Channel Selectivity
ICS proforma	A document, in the form of a questionnaire, which when completed for an implementation or system becomes an ICS.
ICT	Incoming Call Timer
ID	IdentityIdentifier
ID-000 SIM	A UICC having the form on an ID-000 card (see ISO 7816-1 [24]) that contains a SIM application.
ID1 SIM	A UICC having the format of an ID1 card (see ISO 78161 [24]) that contains a SIM.
IDFT	Inverse Discrete Fourier Transform
IDL	Interface Definition Language
Idle mode	The state of UE switched on but which does not have any established RRC connection.
IDN	Integrated Digital Network
IDNNS	Intra Domain NAS Node Selector
IE	Information Element
IEC	International Electrotechnical Commission
IED	Information Element Data
IEI	Information Element Identifier
IEIDL	Information Element Identifier Data Length
IETF	Internet Engineering Task Force
IF	Infrastructure
IFD	Interface Device
IFS	Information Field Sizes
IFSC	Information Field Size for the UICC
IFSD	Information Field Size for the Terminal
IHOSS	Internet Hosted Octet Stream Service
IIOP	Internet Inter-ORB Protocol
IK	Integrity key
IM	IntermodulationIP Multimedia
IMA	Inverse Multiplexing on ATM
IMC	IMS Credentials
IMEI	International Mobile Equipment Identity
IMGI	International mobile group identity
IMPI	IP Multimedia Private Identity
Implementation capability	A capability that relates to a particular technical domain. Examplesa spreading factor of 128 (in the domain of the physical layer); the A5 algorithm; a 64 bit key length (in the domain of security); a power output of 21 dBm (in the domain of transmitter performance); support of AMR Codec (in the domain of the Codec); support of CHV1 (in the domain of the USIM).
Implementation Conformance Statement (ICS)	A statement made by the supplier of an implementation or system claimed to conform to a given specification, stating which capabilities have been implemented. The ICS can take several formsprotocol ICS, profile ICS, profile specific ICS, information object ICS, etc.
IMPU	IP Multimedia PUblic identity
IMS	IP Multimedia Subsystem
IMS Credentials (IMC)	A set of IMS security data and functions for IMS access by a terminal that does not support any 3GPP access technology.. The IMC is not including an ISIM or a USIM. The IMC is not used if ISIM or USIM is present..
IMS Multimedia Telephony	A service that allows multimedia conversational communications between two or more users. It provides real time bidirectional conversational transfer of media, e.g. speech, video, text or other types of data. The IMS multimedia telephony service includes Supplementary Services and takes account of regulatory requirements.
IMS SIM (ISIM)	An application residing on the UICC that provides access to IP Multimedia Services.
IMSI	International Mobile Subscriber IdentityInternational Mobile Subscriber IdentityIP Internet Protocol
IMT-2000	International Mobile Telecommunications 2000
IMUN	International Mobile User Number
IN	Intelligent NetworkInterrogating Node
INAP	Intelligent Network Application Part
INF	INFormation field
Information Data Rate	Rate of the user information, which must be transmitted over the Air Interface. For example, output rate of the voice codec.
Initial paging information	This information indicates if the UE needs to continue to read more paging information and eventually receive a page message.
Initial paging occasion	The paging occasion the UE uses as starting point for its paging DRX cycle.
Integrity	(in the context of security) The avoidance of unauthorised modification of information.
Inter PLMN handover	Handover between different PLMNs, ie having different MCC-MNC.
Inter System Change	a change of radio access between different radio access technologies such as GSM and UMTS.
Inter system handover	Handover between networks using different radiosystems , e.g. UMTS – GSM.
Interactive service	A service which provides the means for bi-directional exchange of information between users. Interactive services are divided into three classes of servicesconversational services, messaging services and retrieval services (source ITU-T I.113).
Intercell handover	A handover between different cells. An intercell handover requires network connections to be altered.
Interface	The common boundary between two associated systems (source ITU-T I.112).
Interference Signal Code Power (ISCP)	Given only interference power is received, the average power of the received signal after despreading and combining.
International Mobile Station Equipment Identity (IMEI)	An 'International Mobile Station Equipment Identity' is a unique number which shall be allocated to each individual mobile station equipment in the PLMN and shall be unconditionally implemented by the MS manufacturer.
International mobile user number (IMUN)	The International Mobile User Number is a diallable number allocated to a 3GPP System user.
Interpreter	A software program that simulates a hypothetical computer by performing the operations defined by the instructions of this computer.(see also 'byte code' and 'virtual machine').
Interworking WLAN (I-WLAN)	A WLAN that interworks with a 3GPP system.
Intra PLMN handover	Handover within the same network, ie having the same MCC-MNC regardless of radio access system.
Intracell handover	A handover within one sector or between different sectors of the same cell. An intracell handover does not require network connections to be altered.
IP	Internet Protocol
IP-CAN	IP-Connectivity Access Network
IP-Connectivity Access Network bearer (IP-CAN bearer)	The data communications bearer provided by the IP-Connectivity Access Network. When using GPRS, the IP-Connectivity Access Network bearers are provided by PDP Contexts.
IP-Connectivity Access Network (IP-CAN)	The collection of network entities and interfaces that provides the underlying IP transport connectivity between the UE and the IMS entities. An example of an 'IP-Connectivity Access Network' is GPRS.
IP-M	IP Multicast
IPv4	Internet Protocol Version 4
IPv6	Internet Protocol Version 6
IR	Infrared
ir Interface User Rate	The user rate between Mobile Termination and IWF. For T services it is the maximum possible AIUR not including padding. For NT services it is the maximum possible AIUR.
IRP	Integration Reference Point
IRP Information Model	An IRP Information Model consists of an IRP Information Service and a Network Resource Model (see below for definitions of IRP Information Service and Network Resource Model).
IRP Information Service	An IRP Information Service describes the information flow and support objects for a certain functional area, e.g. the alarm information service in the fault management area. As an example of support objects, for the Alarm IRP there is the alarm record and alarm list.
IRP Solution Set	An IRP Solution Set is a mapping of the IRP Information Service to one of several technologies (CORBA/IDL, SNMP/SMI, CMIP/GDMO, etc.). An IRP Information Service can be mapped to several different IRP Solution Sets. Different technology selections may be done for different IRPs.
ISC	International Switching Centre
ISCP	Interference Signal Code Power
ISDN	Integrated Services Digital Network
ISIM	IM Services Identity Module
ISO	International Organisation for Standardisation
ISP	Internet Service Provider
ISUP	ISDN User Part
ITC	Information Transfer Capability
ITU	International Telecommunication Union
ITUR	Radiocommunication Sector of the ITU
Iu	Interconnection point between an RNC or a BSC and a 3G Core Network. It is also considered as a reference point.
Iu-flex	Routing functionality for intra domain connection of RAN nodes to multiple CN nodes.
Iu mode	mode of operation of the MS when connected to the Core Network via GERAN or UTRAN and the Iu interface.
Iub	Interface between an RNC and a Node B.
IUI	International USIM Identifier
Iur	A logical interface between two RNC. Whilst logically representing a point to point link between RNC, the physical realisation may not be a point to point link.
IUT	Implementation Under Test
IWF	InterWorking Function
IWMSC	InterWorking MSC
IWU	Inter Working Unit
JAR file	Java Archive File
JCRE	Java Card™ Run Time Environment
JD	Joint Detection
JNDI	Java Naming Directory Interface
JP	Joint Predistortion
JPEG	Joint Photographic Experts Group
JTAPI	Java Telephony Application Programming Interface
JVM	Java™ Virtual Machine
K	Constraint length of the convolutional codeUSIM Individual key
k	Windows size
kB	Kilobyte (1000 bytes)
kbps	kilo-bits per second
Kc	Ciphering key
Key pair	Key pairs are matching private and public keys. If a block of data is encrypted using the private key, the public key from the pair can be used to decrypt it. The private key is never divulged to any other party, but the public key is available, e.g. in a certificate.
Ki	Individual subscriber authentication key
KSI	Key Set Identifier
ksps	kilo-symbols per second
L1	Layer 1Layer 1 (physical layer)
L2	Layer 2Layer 2 (data link layer)
L2ML	Layer 2 Management Link
L2R	Layer 2 Relay
L2R BOP	L2R Bit Orientated Protocol
L2R COP	L2R Character Orientated Protocol
L3	Layer 3Layer 3 (network layer)
LA	Location Area
LAC	Link Access ControlLocation Area Code
LAI	Location Area Identity
LAN	Local Area Network
LAPB	Link Access Protocol Balanced
LAPDm	Link Access Protocol on the Dm channel
LATA	Local Access and Transport Area
LAU	Location Area Update
LB	Load Balancing
LCAP	Generic name for the transport signalling protocols used to set-up and tear-down transport bearers.
LCD	Low Constrained Delay
LCN	Local Communication Network
LCP	Link Control Protocol
LCR	Low Chip Rate
LCS	Location Services
LCSC	LCS Client
LCSS	LCS Server
LE	Local Exchange
LEN	LENgth
LI	Length IndicatorLanguage Indication Length IndicatorLine Identity
LLC	Logical Link ControlLow Layer Compatibility
llowable PLMN	A PLMN which is not in the list of forbidden PLMN in the UE.
llowed CSG list	A list stored in the UE under both user and operator control, containing the CSG identities and associated PLMN identities of the CSGs to which the subscriber belongs.
Lm	Traffic channel with capacity lower than a Bm
LMSI	Local Mobile Station Identity
LMU	Location Measurement Unit
LN	Logical Name
LNA	Low Noise Amplifier
LND	Last Number Dialled
LNS	L2TP Network Server
Local Service	Services, which are provided by current roamed to network that are not HE services. The same service can be provided by a network as a local service to inbound roamers and as a HE service to the subscribers of this network.
Localised Service Area (LSA)	A LSA is an operator-defined group of cells, for which specific access conditions apply. This may correspond to an area in which the Core Network offers specific services. A LSA may be defined within a PLMN or globally. Therefore, a LSA may offer a non-contiguous radio coverage.
Location Registration (LR)	The UE registers its presence in a registration area, for instance regularly or when entering a new registration area.
Logical Channel	A logical channel is an information stream dedicated to the transfer of a specific type of information over the radio interface. Logical Channels are provided on top of the MAC layer.
Logical Channel (UICC)	A command/response communication context multiplexed on the physical channel between the ME and the UICC.
Logical Model	A Logical Model defines an abstract view of a network or network element by means of information objects representing network element, aggregations of network elements, the topological relationship between the elements, endpoints of connections (termination points), and transport entities (such as connections) that transport information between two or more termination points.The information objects defined in the Logical Model are used, among others, by connection management functions. In this way a physical implementation independent management is achieved.
Logical O&M	Logical O&M is the signalling associated with the control of logical resources (channels, cells,) owned by the RNC but physically implemented in the Node B. The RNC controls these logical resources. A number of O&M procedures physically implemented in Node B impact on the logical resources and therefore require an information exchange between RNC and Node B. All messages needed to support this information exchange are classified as Logical O&M forming an integral part of NBAP.
LPLMN	Local PLMN
LR	Location RegisterLocation Registration
LSA	Localised Service Area
LSA exclusive access cell	A UE may only camp on this cell if the cell belongs to the LSAs to which the user has subscribed. Nevertheless, if no other cells are available, the UE of non-LSA users may originate emergency calls from this cell.
LSA only access	When LSA only access applies to the user, the UE can only access cells that belong to the LSAs to which the user has subscribed. Outside the coverage area of the subscribed LSAs, the UE may camp on other cells and limited services apply.
LSA preferential access cell	A LSA preferential access cell is a cell which is part of the LSA. UEs of users that have subscribed to a LSA of a LSA-preferential-access cell have higher priority to resources than non-LSA users in the same cell.
LSB	Least Significant Bit
LSF	Last Segment Flag
LSTR	Listener SideTone Rating
LTE	Long Term EvolutionLocal Terminal Emulator
LTZ	Local Time Zone
LU	Local UnitsLocation Update
LV	Length and Value
M	Mandatory
MA	Mobile AllocationMultiple Access
MAC	Medium Access ControlMedium Access Control (protocol layering context)Message authentication code (encryption context)
MAC-A	MAC used for authentication and key agreement (TSG T WG3 context)
MAC-I	Message Authentication Code for IntegrityMAC used for data integrity of signalling messages (TSG T WG3 context)
MACN	Mobile Allocation Channel Number
Macro cells	'Macro cells' are outdoor cells with a large cell radius.
Macro diversity handover	'Macro diversity' is a operation state in which a User Equipment simultaneously has radio links with two or more UTRAN access points for the sole aim of improving quality of the radio connection or providing seamless.
MAF	Mobile Additional Function
MAH	Mobile Access Hunting supplementary service
MAHO	Mobile Assisted Handover
MAI	Mobile Allocation Index
MAIO	Mobile Allocation Index Offset
Management Infrastructure	The collection of systems (computers and telecommunications) a 3GPP System Organisation has in order to manage a 3GPP System.
Mandatory UE Requirement	Regulatory requirement which is applicable to 3G UEs. It is determined by each country/region and beyond the scope of 3GPP specification (e.g. spurious emission in UK).
MAP	Mobile Application Part
Master File (MF)	The root directory of the file system hierarchy on the UICC.
Maximum output Power	For UE, this is a measure of the maximum power supported by the UE (i.e. the actual power as would be measured assuming no measurement error) (TS 25.101). For FDD BS, the mean power level per carrier of the base station measured at the antenna connector in a specified reference condition (TS 25.104). For TDD BS this refers to the measure of power when averaged over the transmit timeslot at the maximum power setting (TS 25.105).
Maximum possible AIUR	The highest possible AIUR that the multiple TCH/F can provide, e.g. 2 TCH/F using TCH/F9.6 provides a maximum possible AIUR of 19,2 kbit/s.
Maximum Transmitter Power Per Traffic Channel (dBm)	The maximum power at the transmitter output for a single traffic channel.
MBMS	Multimedia Broadcast Multicast ServiceMBMS Multimedia Broadcast Multicast ServiceMultimedia Broadcast-Multicast ServiceMultimedia Broadcast and Multicast Service
MBR	Maximum Bit Rate
MBSFN	Multimedia Broadcast multicast service Single Frequency NetworkMulticast/Broadcast over Single Frequency Network
MCC	Mobile Country Code
MCCH	Multicast Control Channel
MCE	Multi-cell/multicast Coordination Entity
MCH	Multicast Channel
MCI	Malicious Call Identification supplementary service
MCML	Multi-Class Multi-Link PPP
Mcps	Mega-chips per second
MCS	Modulation and Coding Scheme
MCU	Media Control Unit
MD	Mediation Device
MDL	(mobile) Management (entity) - Data Link (layer)
MDS	Multimedia Distribution Service
ME	Maintenance EntityMobile Equipment
Mean bit rate	A measure of throughput. The average (mean) bit rate available to the user for the given period of time (source ITU-T I.210).
Mean transit delay	The average transit delay experienced by a (typically) large sample of PDUs within the same service category.
Medium Access Control	A sub-layer of radio interface layer 2 providing unacknowledged data transfer service on logical channels and access to transport channels.
MEF	Maintenance Entity Function
MEHO	Mobile evaluated handover
MER	Message Error Ratio
Messaging service	An interactive service which offers user-to-user communication between individual users via storage units with store-and-forward, mailbox and/or message handling, (e.g., information editing, processing and conversion) functions (source ITU-T I.113).
MExE	Mobile Execution Environment
MExE Classmark	A MExE classmark identifies a category of MExE UE supporting MExE functionality with a minimum level of processing, memory, display, and interactive capabilities. Several MExE classmarks may be defined to differentiate between the functionalities offered by different MExE UEs. A MExE application or applet defined as being of a specific MExE Classmark indicates that it is supportable by a MExE UE of that Classmark.
MExE executable	An executable is an applet, application, or executable content, which conforms to the MExE specification and may execute on the ME.
MExE server	A node supporting MExE services in the MExE service environment.
MExE service	a service enhanced (or made possible) by MExE technology.
MExE service environment	Depending on the configuration of the PLMN, the operator may be able to offer support to MExE services in various ways. Examples of possible sources are from traditional GSM nodes, IN nodes, operator-specific nodes, operator franchised nodes and services provider nodes, together with access to nodes external (i.e. vendor-specific) to the PLMN depending on the nature of the MExE service. These nodes are considered to constitute the MExE service environment. The MExE service environment shall support direct MExE UE to MExE UE interaction of MExE services.
MExE service provider	an organisation which delivers MExE services to the subscriber. This is normally the PLMN operator, but could be an organisation with MExE responsibility (which may have been delegated by the PLMN operator).
MExE SIM	A (U)SIM application that is capable of storing a security certificate that is accessible using standard mechanisms.
MExE subscriber	The owner of a subscription who has entered into an agreement with a MExE service provider for MExE services.
MF	Master FileMultiFrame
MGCF	Media Gateway Control Function
MGCP	Media Gateway Control Part
MGT	Mobile Global Title
MGW	Media GateWay
MHEG	Multimedia and Hypermedia Information Coding Expert Group
MHS	Message Handling System
MIB	Master Information BlockManagement Information Base
MIC	Mobile Interface Controller
Micro cells	'Micro cells' are small cells.
MIM	Management Information Model
MIMO	Multiple Input Multiple Output
Minimum transmit power	The minimum controlled output power of the TDD BS is when the power control setting is set to a minimum value. Thei si when the power control indicates a miminum transmit output power is required (TS 25.105).
MIP	Mobile IP
MIPS	Million Instructions Per Second
MLC	Mobile Location Centre
MM	Mobility ManagementMan MachineMobility ManagementMultimedia
MME	Mobility Management EntityMobile Management Entity
MMI	Man Machine Interface
MNC	Mobile Network Code
MNP	Mobile Number Portability
MO	Mobile Originated
MO-LR	Mobile Originating Location Request
MO-SMS	Mobile Originated Short Message Service
Mobile Equipment (ME)	The Mobile Equipment is functionally divided into several entities, i.e.one or more Mobile Terminations (MT) and one or more Terminal Equipments (TE).
Mobile evaluated handover	Mobile evaluated handover (MEHO) is a type of handover triggered by an evaluation made in the mobile. The mobile evaluates the necessity of handover based on the measured radio environment and based on criteria defined by the network. When the evaluation meets the hand-off criteria the necessary information is sent from the mobile to the network. The network then decides on the necessity of the handover based on the reported evaluation result and other conditions, e.g. uplink radio environment and/or availability of network resources, the network may then execute the handover.
Mobile number portability	The ability for a mobile subscriber to change subscription network within the same country whilst retaining their original MSISDN(s).
Mobile Station (MS)	A Mobile Station (MS) corresponds to a User Equipment (UE). See 3GPP TS 24.002.
Mobile Termination (MT)	The Mobile Termination is the component of the Mobile Equipment (ME) which supports functions specific to management of the PLMN access interface (3GPP or non-3GPP). The MT is realized as a single functional entity..
Mobility	The ability for the user to communicate whilst moving independent of location.
Mobility Management	A relation between the mobile station and the UTRAN that is used to set-up, maintain and release the various physical channels.
MOHO	Mobile Originated Handover
MOP	Maximum Output PowerMPR Maximum Power Reduction
MOS	Mean Opinion Score
MoU	Memorandum of Understanding
MP	Multi-link PPP
MPEG	Moving Pictures Experts Group
MPH	(mobile) Management (entity) - PHysical (layer) [primitive]
MPTY	MultiParTY
MRF	Media Resource Function
MRP	Mouth Reference Point
MS	Mobile Station
MSAP	MCH Subframe Allocation Pattern
MSB	Most Significant Bit
MSC	Mobile Switching Centre
MSCM	Mobile Station Class Mark
MSCU	Mobile Station Control Unit
MSE	MExE Service Environment
MSID	Mobile Station Identifier
MSIN	Mobile Station Identification Number
MSISDN	Mobile Subscriber ISDN Number
MSP	Multiple Subscriber Profile
MSR	Maximum Sensitivity ReductionMTCH MBMS Traffic Channel
MSRN	Mobile Station Roaming Number
MT	Mobile TerminatedMobile Termination
MT-LR	Mobile Terminating Location Request
MT-SMS	Mobile Terminated Short Message Service
MTM	Mobile-To-Mobile (call)
MTP	Message Transfer Part
MTP3-B	Message Transfer Part level 3
MTU	Maximum Transfer Unit
MU	Mark Up
MUI	Mobile User Identifier
Multi mode terminal	UE that can obtain service from at least one UTRA radio access mode, and one or more different systems such as GSM bands or possibly other radio systems such IMT-2000 family members.