NOMA	Non-orthogonal multiple access
IoT	Internet of things
OMA	Orthogonal multiple access
SCMA	Sparse code multiple access
PDMA	Pattern division multiple access
MIMO	Multiple input multiple output
DCP	Difference of convex functions programming
QoS	Quality of service
BS	Base station
UE	User equipment
PPPs	Poisson point processes
TDD	Time division duplex
AWGN	Additive white Gaussian noise
SIC	Successive interference cancellation
SINR	Signal-to-interference-plus-noise ratio
Co-OMA	OMA-based cooperative network
ORG-DCPA	Opportunistic with DCP-based allocation
DRG-FTPA	Dynamic relay grouping with fixed transmit power allocation
ORG-FTPA	Opportunistic relay grouping with fixed transmit power allocation