  Unmanned aerial vehicle (UAV) corridors are sky lanes where UAVs fly through
safely between their origin and destination. To ensure the successful operation
of UAV corridors, beyond visual line of sight (BVLOS) wireless connectivity
within the corridor is crucial. One promising solution to support this is the
use of cellular-connected UAV (C-UAV) networks, which offer long-range and
seamless wireless coverage. However, conventional terrestrial base stations
(BSs) that typically employ down-tilted sector antennas to serve ground users
are not ideally suited to serve the aerial vehicles positioned above the BSs.
In our previous work, we focused on studying the optimal uptilt angle of BS
antennas to maximize the wireless coverage probability in UAV corridors.
However, the association of BSs with UAVs was restricted to the nearest BS
association, which limits the potential coverage benefits. In this paper, we
address this limitation by considering the strongest BS signal association in
UAV corridors, which enables enhanced coverage within the corridor compared to
the nearest BS association. The strongest BS association allows UAVs to connect
with the second nearest BSs while also accounting for interference from the
third nearest BSs. Closed-form expression analysis and simulation results show
that the strongest BSs association in UAV corridors yields a superior coverage
probability when compared to the nearest BS association.
