3G	Third generation
5G	Fifth generation
ACK	Acknowledgment
AM	Acknowledged mode
ARQ	Automatic repeat request
CBR	Call block rate
E2E	End-to-end
FTP	File transfer protocol
IP	Internet protocol
KPIs	Key performance indicators
KQIs	Key quality indicators
LTE	Long-Term Evolution
MAC	Media access control
MNOs	Mobile network operators
MOS	Mean opinion score
NACK	Negative acknowledgment
PDCP	Packet data convergence protocol
PSNR	Peak signal to noise ratio
QoE	Quality of experience
TCP	Transmission control protocol
TM	Transparent mode
TTI	Transmission time interval
RAN	Radio access network
RLC	Radio link control
RRC	Radio resource control
SDUs	Service data units
SSIM	Structural similarity
UDP	User datagram protocol
UM	Unacknowledged mode
UMTS	Universal Mobile Telecommunications System
WFL	Weber-Fechner Law