  In this work we study the coexistence in the same Radio Access Network (RAN)
of two generic services present in the Fifth Generation (5G) of wireless
communication systems: enhanced Mobile BroadBand (eMBB) and massive
Machine-Type Communications (mMTC). eMBB services are requested for
applications that demand extremely high data rates and moderate requirements on
latency and reliability, whereas mMTC enables applications for connecting a
massive number of low-power and low-complexity devices. The coexistence of both
services is enabled by means of network slicing and Non-Orthogonal Multiple
Access (NOMA) with Successive Interference Cancellation (SIC) decoding. Under
the orthogonal slicing, the radio resources are exclusively allocated to each
service, while in the non-orthogonal slicing the traffics from both services
overlap in the same radio resources. We evaluate the uplink performance of both
services in a scenario with a multi-antenna Base Station (BS). Our simulation
results show that the performance gains obtained through multiple receive
antennas are more accentuated for the non-orthogonal slicing than for the
orthogonal allocation of resources, such that the non-orthogonal slicing
outperforms its orthogonal counterpart in terms of achievable data rates or
number of connected devices as the number of receive antennas increases.
