Content for TR 21.905 Word version: 17.0.0
4.L 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
4.M M Word‑p. 46
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
4.N N Word‑p. 48
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
