Acronym

Meaning

5GC

5G Core Network

5G-EIR

5G Equipment Identity Register

5QI

5G QoS Identifier

AAS BS

Active Antenna System BS

ACK

Acknowledgement

AF

Application Function

AM

Acknowledged Mode

AMBR

Aggregated Maximum Bit Rate

AMC

Adaptive Modulation and Coding

AMF

Access and Mobility Management Function

AP

Application Protocol

ARP

Address Resolution Protocol

ARQ

Automatic Repeat request

AS

Access Stratum

ASN.1

Abstract Syntax Notation One

AUSF

Authentication Service Function

BA

Bandwidth Adaptation

BAP

Backhaul Adaptation Protocol

BCH

Broadcast Channel

BLER

Block Error Rate

BPSK

Binary Phase Shift Keying

BSF

Binding Support Function

BSR

Buffer Status Report

BWP

Bandwidth part

CA

Carrier Aggregation

CB

Code block

CBG

Code block group

CCCH

Common Control Channel

CCE

Control channel element

CE

Control Element

CID

Context Identifier

CM

Connection Management

CMAS

Commercial Mobile Alert Service

COT

Channel Occupancy Time

CP

Cyclic prefix

CP

Control Plane

CQI

Channel quality indicator

CRC

Cyclic redundancy check

CRI

CSI-RS Resource Indicator

C-RNTI

Cell RNTI

CS

Configured Scheduling

CSI

Channel state information

CSI-RS

Channel state information reference signal

CSI-RSRP

CSI reference signal received power

CSI-RSRQ

CSI reference signal received quality

CSI-SINR

CSI signal-to-noise and interference ratio

CS-RNTI

Configured Scheduling RNTI

CU

Centeral Unit

CW

Codeword

DC

Dual Connectivity

DCCH

Dedicated Control Channel

DCI

Downlink control information

DFT-s-OFDM

Discrete Fourier Transform-spread-Orthogonal Frequency Division Multiplexing

DL

Downlink

DL-SCH

Downlink Shared Channel

DM-RS

Dedicated demodulation reference signals

DN

Data Network

DNN

Data Network Name (Same as APN name in LTE)

DRA

Diameter Routing Agent

DRB

Data Radio Bearer carrying user plane data

DRX

Discontinuous Reception

DU

Distributed Unit

EHPLMN

Equivalent Home Public Land Mobile Network

EN-DC

EUTRA-NR Dual Connectivity

EPC

Evolved Packet Core

EPRE

Energy per resource element

EPS

Evolved Packet System

ETWS

Earthquake and Tsunami Warning System

E-UTRA

Evolved Universal Terrestrial Radio Access

E-UTRAN

Evolved Universal Terrestrial Radio Access Network

F1AP

F1 Application Protocol

F1-C

F1 Control plane interface

F1-U

F1 User plane interface

FDD

Frequency Division Duplex

FEC

Forward Error Correction

FFS

For Further Study

FMC

First Missing Count

GERAN

GSM/EDGE Radio Access Network

GF

Grant Free

GFBR

Guaranteed Flow Bit Rate

gNB

NR Node B

gNB-CU

gNB Central Unit

gNB-DU

gNB Distributed Unit

GNSS

Global Navigation Satellite System

GSCN

Global Synchronization Raster Channel

GSM

Global System for Mobile Communications

GTP-U

GPRS Tunnelling Protocol

HARQ

Hybrid Automatic Repeat Request

HARQ-ACK

Hybrid automatic repeat request acknowledgement

HFN

Hyper Frame Number

IAB

Integrated Access/Backhaul

IE

Information element

IETF

Internet Engineering Task Force

IMEI

International Mobile Equipment Identity

IMSI

International Mobile Subscriber Identity

IP

Internet Protocol

kB

Kilobyte (1000 bytes)

L1

Layer 1

L2

Layer 2 (data link layer)

L3

Layer 3 (network layer)

LADN

Local Area Data Network

LCG

Logical Channel Group

LDPC

Low Density Parity Check

MAC

Medium Access Control

MAC-I

Message Authentication Code for Integrity

MCG

Master Cell Group

MCS

Modulation and coding scheme

MEC

Mobile Edge Computing

MFBR

Maximum Flow Bit Rate

MIB

Master Information Block

MICO

Mobile Initiated Connection Only

MIMO

Multiple Input Multiple Output

MN

Master Node

MR-DC

Multi-RAT Dual Connectivity

N/A

Not Applicable

NAS

Non-Access Stratum

NCGI

NR Cell Global Identifier

NCR

Neighbour Cell Relation

NE-DC

NR-E-UTRA Dual Connectivity

NEF

Network Exposure Function

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

NGEN-DC

NG-RAN E-UTRA-NR Dual Connectivity

NG-RAN

NG Radio Access Network

NGAP

NG Application Protocol

NR

NR Radio Access

NRF

NF Repository Function

NSA

Non StandAlone

NSSAI

Network Slice Selection Assistance Information

NSSF

Network Slice Selection Function

NWDAF

Network Data Analytics Function

OAM

Operation, Administration, Maintenance

O&M

Operation and Maintenance

OFDM

Orthogonal Frequency Division Multiplexing

OSI

Other System Information

PBCH

Physical Broadcast Channel

PCell

Primary Cell

PCH

Paging Channel

PDCCH

Physical downlink control channel

PDCP

Packet Data Convergence Protocol

PDSCH

Physical downlink shared channel

PRACH

Physical Random Access Channel

PSS

Primary Synchronisation Signal

PUCCH

Physical uplink control channel

PUSCH

Physical uplink shared channel

PDU

Protocol Data Unit

PHR

Power Headroom Report

PLMN

Public Land Mobile Network

PMI

Precoding Matrix Indicator

PRACH

Physical random access channel

PRB

Physical resource block

PRG

Physical resource block group

PSS

Primary synchronization signal

PTAG

Primary Timing Advance Group

PTI

Procedure Transaction Identity

PT-RS

Phase-tracking reference signal

PUCCH

Physical uplink control channel

PUSCH

Physical uplink shared channel

PWS

Public Warning System

QAM

Quadrature Amplitude Modulation

QCL

Quasi-collocation

QFI

QoS Flow ID

QoS

Quality of Service

QPSK

Quadrature Phase Shift Keying

RACH

Random Access Channel

RAN

Radio Access Network

RAT

Radio Access Technology

RB

Resource block

RB

Radio Bearer

RBG

Resource block group

RE

Resource element

REG

Resource element group

RF

Radio Frequency

RI

Rank indication

RIV

Resource indicator value

RLC

Radio Link Control

RMSI

Remaining Minimum SI(System Information)

RNA

RAN-based Notification Area

RNAU

RAN-based Notification Area Update

RNL

Radio Network Layer

RNTI

Radio Network Temporary Identifier

ROHC

RObust Header Compression

RPLMN

Registered Public Land Mobile Network

RQA

Reflective QoS Attribute

RQoS

Reflective Quality of Service

RRC

Radio Resource Control

RS

Reference signal

RSRP

Reference signal received power

RTP

Real Time Protocol

SA

StandAlone

SAP

Service Access Point

SBA

Srvice Based Architecture

SCell

Secondary Cell

SCEF

Service Capability Exposure Function

SCG

Secondary cell group

SCH

Shared Channel

SCP

Service Communication Proxy

SCTP

Stream Control Transmission Protocol

SDAP

Service Data Adaptation Protocol

SDF

Service Data Flow

SDU

Service Data Unit

SFN

System Frame Number

SI

System Information

SIB

System Information Block

SM

Session Management

SMF

Session Management Function

SMSF

Short Message Service Function

SMTC

SS block based RRM measurement timing configuration

SN

Sequence Number

SN

Secondary Node

SNN

Serving Network Name

S-NSSAI

Single NSSAI(Network Slice Selection Assistance Information)

SpCell

Special Cell

SPS

Semi-Persistent Scheduling

SR

Scheduling request

SRB

Signalling Radio Bearer

SRB

Signalling Radio Bearer carrying control plane data

SRS

Sounding reference signal

SS

Synchronisation signal

SSB

Synchronization Signal Block

SSC

Session and Service Continuity

SS-RSRP

SS reference signal received power

SS-RSRQ

SS reference signal received quality

SSS

Secondary synchronization signal

SS-SINR

SS signal-to-noise and interference ratio

SST

Slice/Service Type

STAG

Secondary Timing Advance Group

S-TMSI

SAE Temporary Mobile Station Identifier

SUL

Supplementary Uplink

TA

Timing advance

TAG

Timing advance group

TB

Transport Block

TCI

Transmission Configuration Indicator

TCP

Transmission Control Protocol

TPC

Transmit Power Control

TDD

Time Division Duplex

TDM

Time division multiplexing

TM

Transparent Mode

TNL

Transport Network Layer

TRP

Transmission and Reception Point

TPC-CS-RNTI

Transmit Power Control-Configured Scheduling-RNTI

TPC-PUCCH-RNTI

Transmit Power Control-Physical Uplink Control Channel-RNTI

TPC-PUSCH-RNTI

Transmit Power Control-Physical Uplink Shared Channel-RNTI

TPC-SRS-RNTI

Transmit Power Control-Sounding Reference Symbols-RNTI

TTI

Transmission Time Interval

UCI

Uplink control information

UDM

Unified Data Management

UDP

User Datagram Protocol

UDR

User Data Repository

UDSF

Unstructured Data Storage Function

UE

User equipment

UICC

Universal Integrated Circuit Card

UL

Uplink

UL-SCH

Uplink shared channel

UM

Unacknowledged Mode

UP

User Plane

UPF

User Plane Function

URLLC

Ultra-Reliable and Low Latency Communications

URN

Uniform Resource Name

UTC

Coordinated Universal Time

UTRAN

Universal Terrestrial Radio Access Network

X-MAC

Computed MAC-I

Xn

network interface between NG-RAN nodes

Xn-C

Xn-Control plane (control plane interface between NG-RAN and 5GC)

Xn-U

Xn-User plane (user plane interface between NG-RAN and 5GC)

XnAP

Xn Application Protocol