View source for 3GPP LTE Abbreviations Dictionary.ld2

'''Info''': 1,785 English entries
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|-
|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)
|-
|<abbr>ACL</abbr>
|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
|-
|<abbr>API</abbr>
|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
|-
|<abbr>DNS</abbr>
|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 (<abbr>API</abbr>) 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
|-
|<abbr>IE</abbr>
|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
|-
|<abbr>LAN</abbr>
|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.
|}


[[Category:Abbreviations]]
[[Category:IT]]
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