  Offloading cellular hotspot regions to small-cells has been the main theme
for the fifth generation of cellular network. One such hotspot is the public
transport which carries a large number of cellular users who frequently receive
low quality of service (QoS) due to vehicular penetration effect (VPE). Hence
installation of mobile-cell (MC) within public transport is seen as a potential
enabler to enhance QoS for commuting users. However, unlike fixed cells, MC
requires wireless backhaul (BH) connectivity along with in-vehicle Access-Link
(AL) communication. These additional wireless links for MC communication will
pose an excessive burden on an already scarce frequency spectrum. Hence, in
this research, we exploit VPE and line-of-sight (LOS) communication to allow
the downlink backhaul (DL-BH) sub-channels to be shared by in-vehicle downlink
access-link (DL-AL) transmission. Our analysis and simulations show that using
the above-mentioned technique, both links maintain high success probability,
especially in regions with low signal to interference ratios.
