Abstract
Motivated by the need for ubiquitous and reliable communications in
post-disaster emergency management systems (EMSs), we hereby present a
novel and efficient stochastic geometry (SG) framework.
This mathematical model is specifically designed to evaluate the quality
of service (QoS) experienced by a typical ground user equipment (UE)
residing either inside or outside a generic area affected by a calamity.
In particular, we model the functioning terrestrial base stations (TBSs)
as an inhomogeneous Poisson point process (IPPP), and assume that a
given number of uniformly distributed unmanned aerial vehicles (UAVs)
equipped with cellular transceivers is deployed in order to compensate
for the damage suffered by some of the existing TBSs.
The downlink (DL) coverage probability is then derived based on the
maximum average received power association policy and the assumption of
Nakagami-m fading conditions for all wireless links.
The proposed numerical results show insightful trends in terms of
coverage probability, depending on: distance of the UE from the disaster
epicenter, disaster radius, quality of resilience (QoR) of the
terrestrial network, and fleet of deployed ad-hoc aerial base stations
(ABSs).
The aim of this paper is therefore to prove the effectiveness of
vertical heterogeneous networks (VHetNets) in emergency scenarios, which
can both stimulate the involved authorities for their implementation and
inspire researchers to further investigate related problems.