  Integrated access and backhaul (IAB) is envisioned as a possible solution to
address the need for network densification in situations where fiber connection
is not viable. In Release 18, 3rd generation partnership project (3GPP) will
take another step on extending IAB capabilities. With mobile IAB (mIAB), IAB
nodes can be deployed within vehicles, e.g., buses. As in every new technology,
performance assessment and evaluation of the impact of interference is of
interest for industry and academia. In this paper, we present contributions on
those topics. First, we evaluate the performance of mIAB compared to fiber
connected deployments. Moreover, we study the impact of interference on the
performance of mIAB networks and propose a solution based on inserting silent
slots on the time division duplex (TDD) frame pattern. According to our
simulation results, mIAB is capable of improving performance of onboard user
equipments (UEs) without harming too much the quality of service (QoS) of
surrounding UEs. Furthermore, we show that the TDD frame pattern should be
carefully designed to account for scenarios with different levels of
interference.
