  Device density in cellular networks is expected to increase considerably in
the next future. Accordingly, the access point (AP) will equip massive
multiple-input multiple-output (mMIMO) antennas, using collimated
millimeter-wave (mmW) and sub-THz communications, and increase the bandwidth to
accommodate the growing data rate demands. In this scenario, interference plays
a critical role and, if not characterized and mitigated properly, might limit
the performances of the network. In this context, this paper derives the
statistical properties of the aggregated interference power for a cellular
network equipping a mMIMO cylindrical array. The proposed statistical model
considers the link blockage and other network parameters such as antenna
configuration and device density. The findings show that the characteristic
function (CF) of the aggregated interference power can be regarded as a
weighted mixture of two alpha-stable distributions. Furthermore, by analyzing
the service probability, it is found that there is an optimal configuration of
the array depending on the AP height and device density. The proposed
statistical model can be part of the design of dense networks providing
valuable insights for optimal network deployment
