K
k Windows size
K Constraint length of the convolutional code
USIM Individual key
kbps kilo-bits per second
Kc Ciphering key
Ki Individual subscriber authentication key
KPI Key Performance Indicator
KSI Key Set Identifier
ksps kilo-symbols per second
L
L1 Layer 1 (physical layer)
L2 Layer 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 3 (network layer)
LA Location Area
LAC Link Access Control
Location 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
LCD Low Constrained Delay
LCG Logical Channel Group
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 Language Indication
Lawful Interception
Length Indicator
Line Identity
LIPA Local IP Access
LLC Logical Link Control
Low Layer Compatibility
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
LPLMN Local PLMN
LPP LTE Positioning Protocol
LPPa LTE Positioning Protocol Annex
LR Location Register
Location Registration
LSA Localised Service Area
LSB Least Significant Bit
LSTR Listener SideTone Rating
LTE Local Terminal Emulator
Long Term Evolution
LTZ Local Time Zone
LU Local Units
Location Update
LV Length and Value
M
M Mandatory
M Mandatory
MA Mobile Allocation
Multiple Access
MAC Medium 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 MAC used for data integrity of signalling messages (TSG T WG3 context)
MACN Mobile Allocation Channel Number
MAF Mobile Additional Function
MAH Mobile Access Hunting supplementary service
MAHO Mobile Assisted Handover
MAI Mobile Allocation Index
MAIO Mobile Allocation Index Offset
MAP Mobile Application Part
MBB Mobile Broadband
MBMS Multimedia Broadcast and Multicast Service
MBSFN Multimedia Broadcast multicast service 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
MDT Minimization of Drive Tests
ME Maintenance Entity
Mobile Equipment
MEF Maintenance Entity Function
MEHO Mobile evaluated handover
MER Message Error Ratio
MExE Mobile Execution Environment
MF Master File
MultiFrame
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 Management Information Base
Master Information Block
MIC Mobile Interface Controller
MIM Management Information Model
MIMO Multiple Input Multiple Output
MIP Mobile IP
MIPS Million Instructions Per Second
MLC Mobile Location Centre
MM Man Machine
Mobility Management
Multimedia
MME Mobile Management Entity
MMI Man Machine Interface
mMTC Massive MTC
MNC Mobile Network Code
MNO Mobile Network Operator
MNP Mobile Number Portability
MO Mobile Originated
MO-LR Mobile Originating Location Request
MO-SMS Mobile Originated Short Message Service
MOHO Mobile Originated Handover
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
MSA MCH Subframe Allocation
MSB Most Significant Bit
MSC Mobile Switching Centre
MSCM Mobile Station Class Mark
MSCU Mobile Station Control Unit
MSD Maximum Sensitivity Degradation
MSE MExE Service Environment
MSID Mobile Station Identifier
MSD Maximum Sensitivity Degradation
MSI MCH Scheduling Information
MSIN Mobile Station Identification Number
MSISDN Mobile Subscriber ISDN Number
MSP Multiple Subscriber Profile
MSR Multi-Standard Radio
MSRN Mobile Station Roaming Number
MT Mobile Terminated
Mobile Termination
MTC Machine-Type Communications
MTCH Multicast Traffic Channel
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
MUMS Multi User Mobile Station
MVNO Mobile Virtual Network Operator
N
NACC Network Assisted Cell Change
NACK Negative Acknowledgement
NAD Node Address byte
NAI Network Access Identifier
NAS Non-Access Stratum
NBAP Node B Application Part
NB Normal Burst
NCELL Neighbouring (of current serving) Cell
NBAP Node B Application Part
NBIN A parameter in the hopping sequence
NCC Network (PLMN) Colour Code
NCH Notification CHannel
NCK Network Control Key
NCP Network Control Protocol
NDC National Destination Code
NDUB Network Determined User Busy
NE Network Element
NEF Network Element Function
NEHO Network evaluated handover
NET NETwork
NEV NEVer
NF Network Function
NGCN Next Generation Corporate Network (TSs originating pre-Release-15)
Next Generation Core Network (TSs originating Release 15 onwards)NGMN Next Generation Mobile Networks
NI-LR Network Induced Location Request
NIC Network Independent Clocking
NITZ Network Identity and Time Zone
NM Network Manager
NMC Network Management Centre
NMR Network Measurement Results
NMO Network Mode of Operation
NMS Network Management Subsystem
NMSI National Mobile Station Identifier
NNI Network-Node Interface
NO Network Operator
NP Network Performance
NPA Numbering Plan Area
NPI Numbering Plan Identifier
NRI Network Resource Identifier
NRM Network Resource Model
NRT Non-Real Time
NSAP Network Service Access Point
NSAPI Network Service Access Point Identifier
NSCK Network Subset Control Key
NSDU Network service data unit
NSS Network Sub System
Nt Notification (SAP)
NT Network Termination
Non Transparent
NTAAB New Type Approval Advisory Board
NTDD Narrow-band Time Division Duplexing
NUA Network User Access
NUI National User / USIM Identifier
Network User Identification
NUP National User Part (SS7)
NW Network
O
O Optional
O&M Operations & Maintenance
OA Outgoing Access (CUG SS)
OACSU Off-Air-Call-Set-Up
OCB Outgoing Calls Barred within the CUG
OCCCH ODMA Common Control Channel
OCF Open Card Framework
OCI Outgoing Call Information
OCNG OFDMA Channel Noise Generator
OCNS Orthogonal Channel Noise Simulator
OCS Online Charging System
OCT Outgoing Call Timer
OD Optional for operators to implement for their aim
ODB Operator Determined Barring
ODCCH ODMA Dedicated Control Channel
ODCH ODMA Dedicated Channel
OLR Overall Loudness Rating
ODMA Opportunity Driven Multiple Access
ODTCH ODMA Dedicated Traffic Channel
OID Object Identifier
OFCS Offline Charging System
OFDM Orthogonal Frequency Division Multiplex
Orthogonal Frequency Division Multiplexing
OFDMA Orthogonal Frequency Division Multiple Access
OFM Operational Feature Monitor
OMC Operation and Maintenance Centre
OML Operations and Maintenance Link
OOB Out-of-band
OPLMN Operator Controlled PLMN (Selector List)
OR Optimal Routeing
ORACH ODMA Random Access CHannel
ORLCF Optimal Routeing for Late Call Forwarding
OS Operations System
OSA Open Service Access
OSI Open System Interconnection
OSI RM OSI Reference Model
OSP Octet Stream Protocol
OSP:IHOSS Octet Stream Protocol for Internet Hosted Octet Stream Service
OTA Over-The-Air
OTDOA Observed Time Difference Of Arrival (positioning method)
OTP One Time Password
OVSF Orthogonal Variable Spreading Factor