5G Abbreviations

As a 5G Radio Access Network engineer I prepared a list of 5G abbreviations that can be useful for the people who are reading 3GPP specifications, books about 5G or  papers. The reason behind this list is, when I was searching an abbreviation in search engines, it was hard to find the real abbreviation that is used in the paper or the book that I am reading. For example; if you are searching for the CFO, it will be very hard to find “Carrier Frequency Offset”. In this list, you will find the abbreviations that are focused on telecommunication and 5G, however it includes some general abbreviations also. 

NOTE: If you find any mistake do not hesitate to report.

5QI 5G QoS Identifier
ACIR Adjacent Channel Interference Ratio
ACK Acknowledgement (Confirmation of Receipt)
ACLR Adjacent Channel Leakage power Ratio
ACS Adjacent Channel Selection
AIV Air Interface Variant
AM Acknowledged Mode (in RLC)
AMBR Aggregate Maximum Bir Rate
AMC Adaptive Modulation and Coding
ANR Automatic Neighbor Relation
AP ID Application Protocol Identity
APN Access Point Name
ARFCN Absolute Radio Frequency Channel Number
ARI Acknowledgment Resource Indicator
ARP Allocation and Retention Priority
ARPU Average Revenue Per User
ARQ Automatic Repeat Query
AS Access Stratum
ATB Adaptive Transmission Bandwidth
AWGN Additive White Gaussian Noise
BA Bandwidth Adaptation
BCCH Broadcast Control Channel
BCH Broadcast Channel
BLER Block Error Rate
BSD Buffer Size Duration
BSR Buffer Status Reporting
BWC Bandwidth Combination
BWCS Bandwidth Combination Set
BWP Bandwidth Part
C-RNTI Cell-Radio Network Temporary Identifier
CA Carrier Aggregation
CAZAC Constant Amplitude Zero Autocorrelation (Zadof Chu is a CAZAC Sequence)
CB Code Block
CBC Cell Broadcast Centre
CBE Cell Broadcast Entity
CBG Code Block Group
CBGFI CBG Flush Indicator
CBGTI CBG Transmit Indicator
CBS Cell Broadcast Service
CC Component Carrier
CCCH Common Control Channel
CCE Control Channel Element
CCNF Common Control Network Function
CDD Cyclic Delay Diversity
CDM Code Division Multiplexing
CDMA Code Division Multiple Access
CFO Carrier Frequency Offset
CM Cubic Metric
CMAS Commercial Mobile Alert System
CNE Core Network Element
CNI Core Network Instance
CoMP Coordinated Multi Point
CORESET Control Resource Set
CP-OFDM Cyclic Prefix based OFDM
CPE Common Phase Error
CQI Channel Quality Indicator
CRB Carrier Resource Block
CRC Cyclic Redundency Check
CRI CSI-RS Resource Indicator
CRS Cell-specific Reference Signals
CSC Cell and Subframe Control
CSG Closed Subscriber Group
CSI Channel State Information
CSI-IM Channel State Information-Interference Measurement
CSI-RS Channel State Information-Reference Signal
CSIPTO Coordinated SIPTO
CSS Common Search Space
D-RoF Digital-Radio Over Fiber
DAI Downlink Assignment Index
DC Direct Current (DC subcarrier)
DC Dual Connectivity
DCCH Dedicated Control Channel
DCI Downlik Control Information
DeNB Donor eNB
DL-SCH Downlink Shared Channel
DMRS Demodulation Reference Signal
DNN Data Network Name
DPC Dirty Paper Coding [The idea with DPC is to pre-cancel interference at the transmitter by using perfect knowledge about the channel and transmitted signals. (It is a nonlinear precoding technique).]
DPD Digital Pre-distortion
DRB Data Radio Bearers
DRS Dedicated Reference Signals
DRX Discontinues Reception
DSCP Differentiated Services Code Point
DTCH Dedicated Traffic Channel
DwPTS Downlink Pilot Time Slot
E-RAB EPS Radio Access Bearer
E-UTRA Evolved Universal Terrestrial Radio Access
E-UTRAN Evolved Universal Terrestrial Radio Access Network
EDGE Enhanced Data Rates for GSM Evolution
EIR Equipment Identity Register
EIRP Effective Isotropic Radiated Power
eMBB Enhanced Mobile Broadband
EMM Eps Mobility Management
EN-DC E-UTRA-NR Dual Connectivity 
EPC Evolved Packet Core
EPRE Energy Per Resource Element
EPS Evolved Packet System (LTE)
ERP Effective Raidated Power
ETWS Earthquake and Tsunami Warning System
FAPI Functional Application Platform Interface
FBMC Filter Bank Multi-Carrier
FD-MIMO Full Dimension – MIMO
FDD Frequency Division Duplexing
FDM Frequency Division Multiplexing
FEC Forward Error Correction
FR DMRS Front Loaded DMRS
FSTD Frequency Shift Time Diversity
FTTA Fiber To The Antenna
GBR Guarenteed Bit Rate
GERAN GSM EDGE Radio Access Network
GFBR Guaranteed Flow Bit Rate
GMLC Gateway Mobile Location Centre
gNB-CU gNB Central Unit
gNB-DU gNB Dsitibuted Unit
GPON Gigabit Passive Optical Network
GRE Generic Routing Encapculation
GTP-U GPRS Tunneling Protocol – User Plane
GUAMI Globally Unique AMF ID
HeNB Home eNB
HFN Hyper System Frame Number  (Hyper SFN)
HO Handover
HSPA High Speed Packet Access
HSS Home Subscriber Server
IAB Integrated Access and Backhaul
IANA Internet Assigned Numbers Authority
ICIC Inter-Cell Interference Coordination
IDMA Interleave-division Multiple Access
IMEI International Mobile Equipment Identity
IMS IP Multimedia Subsystem
IMSI International Mobile Subscriber Identity
IOT Internet of Things
IP-CAN IP Connecctivity Access Network
ksps kilosymbols per second.
LA Link Adaptation
LAA Licensed Assisted Access (R13 Lte feature ) – Also known as LTE-U
LADN Local Area Data Network
LBT Listen Before Talk
LCID Logical Channel ID
LCP Logical Channel Prioritization
LCS Location Services
LDPC Low Density Parity Check
LDS Low Density Signature
LEMF Law Enforcement Monitoring Facility
LI Lawful Interception
LIPA Local IP Access
LLR Log-likelihood Ratio
LLS-C Lower Layer Split – Control Plane
lls-CU Lower Layer Split – Central Unit
LLS-U Lower Layer Split – User Plane
LMF Location Management Function
LNF Longnormal Fading
LRC Location Reporting Control
LSB Least Significant Bit
LTE Long Term Evolution
LTE-U LTE Unlicensed (3GPP defines it as LTE-LAA)
LWA LTE-WLAN Aggregation
MAC Medium Access Control
MAPL Maximum Allowable Path Loss
MBR Maximum Bir Rate
MBSFN Multicast Broadcast Single Frequency Network
MCC Mobile Country Code (286 vs.)
MCG Master Cell Group
MCS Modulation and Coding Scheme
MFBI Multi Frequency Band Indicator
MFBR Maximum Flow Bir Rate
MICO Mobile Initiated Connection Only
MIMO Multiple Input Multiple Output
MM Mobility Management (5G MM)
MME Mobility Management Entity
MMSE Minimum Mean Square Error
mMTC Massive Machine Type Communication
MN Master Node
MNC Mobile Network Code (01, 02  vs.)
MOCN Multi Operator Core Network
MORAN Multi Operator Radio Access Network
MPLS Multiprotocol Label Switching
MR-DC Multi RAT Dual Connectivity
MRC Maximum Ratio Combining
MRT Maximum Ratio Transmission
MSB Most Significant Bit
MU-MIMO Multiuser – MIMO
MUSA Multiuser Shared Access
MUST Multiuser Superposition Transmission
N3IWF Non 3GPPP Inter Working Function
NAICS Network Assisted Interference Cancellation and Supression
NAK Negative Acknowledgement
NAS Non Access Stratum
NB-IOT Narrowband – IOT
NCGI NR Cell Global Identifier
NCI NR Cell Identity
NCL Neighbor Cell List
NE-DC NR-E-UTRA Dual Connectivity
NEA NR Encryption Algorithm
NF Network Function
nFAPI Network Functional Application Platform Interface
NG Next Generation (Next Generation Network)
NG-C NG-Control Plane (control plane interface between NG-RAN and 5GC.)
ng-eNB node providing E-UTRA user plane and control plane protocol terminations towards the UE, and connected via the NG interface to the 5GC.
NG-RAN node either a gNB or an ng-eNB.
NG-U NG-User Plane (user plane interface between NG-RAN and 5GC.)
NGAP NG Application Protocol
NGEN-DC NG-RAN-E-UTRA-NR Dual Connectvity
NGFI Next Generation Fronthaul Interface
NIA NR Integrity Algorithm
NOMA Non-orthogonal Multiple Access
NR New Radio
NRPPa NR Positioning Protocol A
NRT Neighbour Relation Table
NSSAI Network Slice Selection Assistance Information
NSSF Network Slice Selection Function
NWDAF Network Data Analytics Funciton
NZP-CSI-RS Non Zero Power-CSI-RS
OBSAI Open Base Station Architecture Initative
OFDM Orthogonal Frequency Division Multiplexing
OFDMA Orthogonal Frequency Division Multiple Access
OOB Out of Band
OTA Over The Air
PAPR Peak to Average Power Ratio
PAs Power Amplifiers
PBCH Physical Broadcast Channel
PBR Prioritised Bitrate
PCC Policy Control and Charging
PCCH Paging Control Channel
PCell Primary Cell
PCH Paging Channel
PCI Physical Cell Identifier
PDB Packet Delay Budget
PDCCH Physical Downlink Control Channel
PDCP Package Data Convergence Protocol
PDMA Pattern-division Multiple Access
PDSCH Physical Downlink Shared Channel
PDU Protocol Data Unit
PEI Permanent Equipment Identifier
PER Packet Error Rate
PI-RNTI Paging Indicator-RNTI
PIM Passive Intermodulation
PL Path Loss (Downlink)
PLL Phase-Locked Loop
PLMN Public Land Mobile Network
PMI Precoding Matrix Indicator
PNF Physical Network Function
PO Paging Occasion
PPD Paging Policy Differentiation
PPF Paging Proceed Factor
PPI Paging Policy Indicator
PPI Payload Protocol Identifier (a field in SCTP)
PRA Physical Random Access
PRACH Pysical Random Access Channel
PRB Physical Resource Block
PRG Precoding Resource Block Group
PRS Positioning Reference Signal
PSS Primary Synchronization Signal
PT-RS Phase Tracking Reference Signal
PUCCH Physical Uplink Control Channel
PUSCH Physical Uplink Shared Channel
PWS Public Warning System
QCL Quasi Co Location
QPSK Quadrature Phase Shift Keying
RA-RNTI Random Access-RNTI
RACH Random Access Channel
RAT Radio Access Technology
REG Resource Element Group
RF Radio Frequency
RFFE RF Front End
RFSP RAT Frequency Selection Priority
RI Resource Indicator
RIV Resource Indication Value
RLC Radio Link Control
RLF Radio Link Failure
RMSI Remaining Minimum SI
RNA RAN-Based Notification Area
RNAU RAN-Based Notification Area Update
RNE Radio Network Element
RNL Radio Network Layer
RNTI Radio Network Temporary Identifier
RNTP Relative Narrowband Transmit Power
RoE Radio Over Ethernet
ROHC Robust Header Compression
RQA Reflective QoS Attribute
RQoS Reflective QoS (Quality Of Service)
RRC Radio Resource Control
RRM Radio Resource Management
RSRP Reference Signal Received Power (is the power per resource element that the mobile is receiving on the cell-specific reference signals)
RSRQ Reference Signal Received Quality (expresses the signal-to-interference plus noise ratio of the cell-specific reference signals)
RTT Round Trip Time
RU Radio Unit
S-NSSAI Single Network Slice Selection Assistance Information
SAP Service Access Point
SC Superposition Coding
SC-FDMA Single Carrier – Frequency Division Multiple Access
SCell Secondary Cell
SCF Small Cell Forum
SCG Secondary Cell Group
SCMA Sparse-code Multiple Access
SCTP Stream Control Tranmission Protocol
SD Slice Differentiator
SDAP Service Data Adaptation Protocol
SDF Service Data Flow
SDL Supplemental DownlinkSupplementary Downlink
SDP Session Description Protocol
SDU Service Data Unit
SFBC Space Frequency Block Coding
SFI-RNTI Slot Format Indicator-RNTI
SFN System Frame Number
SFN/SF System Frame Number / Subframe
SFP Small Form-factor Pluggable
SFTD SFN and Frame Timing Difference
SI System Information
SIC Successive Interference Cancellation
SINR Signal to Interference Noise Ratio
SIP Session Initiation Protocol
SIPTO Selected IP Traffic Offload
SIPTO@LN SIPTO at Local Network
SLA Service Level Agreement
SLIV Start and Length Indicator Value
SM Session Management
SN* Secondary Node (in Dual Connectivity)
SN* Sequence Numbering
SPS Semi Persistent Scheduling
SRB Signaling Radio Bearers
SRI Scheduling Request Indicator
SRNS Serving Radio Network Subsystem
SRS Sounding Reference Signal
SSB* Single Sideband
SSB* Synchronization Signal and PBCH block (38.300 Abb)
SSC Mode Service and Session Continuity mode
SSS Secondary Synchronization Signal
SST Slice Service Type
SU-MIMO Single User – MIMO
SUL Supplementary Uplink
SUPI Subscription Permanent Identifier
SVD Singular Value Decomposition
TA* Tracking Area
TA* Timing Advance
TAC Tracking Area Code
TAG Timing Advance Group
TAI Tracking Area Identity
TB Transport Block
TBS Transport Block Size
TC Tariff Class (IPv& TC Byte)
TCI Transmission Configuration Indicator
TCMA Trellis-Coded Multiple Access
TD-SCDMA Time Division-Synchronous Code Division Multiple Access
TDD Time Division Duplexing
TDM Time Division Multiplexing
TEID Tunnel Endpoint Identifier
TLV Type / Length / Value
TM Transparent Mode
TNL Transport Network Layer
TNLA Transport Network Layer Association
TOS Type Of Service (IPv4 TOS Byte)
TPC Transmit Power Control
TPC-RNTI Transmit Power Control-RNTI
TrCH Transport Channel
TRS Tracking Reference Signal
TRxP Transmission and Reception Point
TTI Transmission Time Interval
UCI Uplink Control Information
UDR Unified Data Repository
UICC Universal Integrated Circuit Card (SIM)
UL-SCH Uplink Shared Channel
UM Unacknowledged Mode (in RLC)
UpPTS Uplink Pilot Time Slot
URLLC Ultra Reliable and Low Latency Communication
USIM Universal Subscriber Identity Module
USS UE-Specific Search Space
UTRAN UMTS Terrestrial Radio Access Network
Uu UMTS Air Interface  (Air interface between RAN and UE)
VNF Virtual Network Function
w.r.t With Respect To [Non Tech Abbrv.]
WCDMA Wideband Code Division Multiple Access
WDM Wavelength Division Multiplexing
WTTA Wireless To The Antenna
Xn Network interface between NG-RAN nodes.
Xn-C Xn Control Plane
Xn-U Xn User Plane
XnAP Xn Application Protocol

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