  Ad hoc networks provide an on-demand, infrastructure-free means to
communicate between soldiers in war zones, aid workers in disaster areas, or
consumers in device-to-device (D2D) applications. Unfortunately, ad hoc
networks are limited by interference due to nearby transmissions.
Millimeter-wave (mmWave) devices offer several potential advantages for ad hoc
networks including reduced interference due to directional antennas and
building blockages, not to mention huge bandwidth channels for large data
rates.. This paper uses a stochastic geometry approach to characterize the
one-way and two-way signal-to-interference ratio distribution of a mmWave ad
hoc network with directional antennas, random blockages, and ALOHA channel
access. The interference-to-noise ratio shows that a fundamental limitation of
an ad hoc network, interference, may still be an issue. The performance of
mmWave ad hoc networks is bounded by the transmission capacity and area
spectral efficiency. The results show that mmWave networks can support much
higher densities and larger spectral efficiencies, even in the presence of
blockage, compared with lower frequency communication for certain link
distances. Due to the increased bandwidth, the rate coverage of mmWave can be
much greater than lower frequency devices.
