Page 36 - ITU Journal Future and evolving technologies Volume 2 (2021), Issue 6 – Wireless communication systems in beyond 5G era

ITU Journal on Future and Evolving Technologies, Volume 2 (2021), Issue 6

MAC Medium Access Control RLC Radio Link Control
MANO Management and Orchestra‐ RN Relay Node
tion RRC Radio Resource Control
RRH Remote Radio Head
MBRLLC Mobile‐Broadband Reliable
Low‐latency Communication RRU Remote Radio Unit
MEC Mobile Edge Computing
MEO Medium Earth Orbit SA Stand‐Alone
MIMO Multiple‐Input Multiple‐ SaaS Software‐as‐a‐Service
Output SAES System Architecture Evolution
ML Machine Learning Speci ication
MME Mobility Management Entity SBA Service‐Based Architecture
mMTC massive Machine‐Type Com‐ SDL Supplementary Downlink
munication SDN Software‐De ined Networking
MOS Mean Opinion Score SDPA Service Data Adaptation Proto‐
col
SDR Software‐De ined Radio
NAS Non‐Access Stratum SFC Service Function Chaining
NFV Network Function Virtualisa‐
S‐GW Serving Gateway
tion
SIP Session Initiation Protocol
NFVI Network Function Virtualiza‐
SLA Service Level Agreement
tion Infrastructure
NMGM New Generation Mobile Net‐ SMF Session Management Function
works SON Self‐Organising Networks
NMS Network Management System SUL Supplementary Uplink
NR New Radio TaHiL Tactile Internet with Human‐
NSA Non‐Stand‐Alone
in‐the‐Loop
TC Tenant SDN Controller
OFDMA Orthogonal Frequency‐ TCP Transmission Control Protocol
Division Multiple Access TDD Time‐Division Duplex
ONF Open Network Foundation TDMA Time‐Division Multiple Access
µONOS Micro Open Network Operating TLS Transport Layer Security
System
OPEX Operational Expenditure UAV Unmanned Aerial Vehicles
OSI Open Systems Interconnection UDP User Datagram Protocol
UE User Equipment
PaaS Platform‐as‐a‐Service uHDD ultra‐High Data Density
PDCP Packet Data Convergence uHSLLC ultra‐High‐Speed Low‐latency
Protocol Communications
PDN‐GW Packet Data Network Gateway uMTC ultra‐reliable Machine‐Type
PDU Protocol Data Unit Communications
PPS Programmable Protocol Stack UMTS Universal Mobile Telecommu‐
PRB Physical Resource Block nications System
PSTN Public Switched Telephone uMUB ubiquitous Mobile Ultra‐
Network Broadband
UPF User Plane Function
QKD Quantum Key Distribution URLLC Ultra‐Reliable Low‐Latency
QoE Quality‐of‐Experience Communication
QoP Quality‐of‐Perception UTRAN UMTS Terrestrial Radio Access
QoPE Quality‐of‐Physical‐Experience Network
QoS Quality‐of‐Service
VIM Virtualized Infrastructure Man‐
RAN Radio Access Network ager
REST Representational state transfer VLC Visible Light Communications
RIS Recon igurable Intelligent VNFM Virtual Network Function Man‐
Surface ager

24 © International Telecommunication Union, 2021