  Massive Multiple-Input Multiple-Output (mMIMO) is one of the essential
technologies introduced by the Fifth Generation (5G) of wireless communication
systems. However, although mMIMO provides many benefits for wireless
communications, it cannot ensure uniform wireless coverage and suffers from
inter-cell interference inherent to the traditional cellular network paradigm.
Therefore, industry and academia are working on the evolution from conventional
Centralized mMIMO (CmMIMO) to Distributed mMIMO (DmMIMO) architectures for the
Sixth Generation (6G) of wireless networks. Under this new paradigm, several
Access Points (APs) are distributed in the coverage area, and all jointly
cooperate to serve the active devices. Aiming at Machine-Type Communication
(MTC) use cases, we compare the performance of CmMIMO and different DmMIMO
deployments in an indoor industrial scenario considering regular and alarm
traffic patterns for MTC. Our simulation results show that DmMIMO's performance
is often superior to CmMIMO. However, the traditional CmMIMO can outperform
DmMIMO when the devices' channels are highly correlated.
