  Radio wave propagation simulations based on the ray-optical approximation
have been widely adopted in coverage analysis for a range of situations,
including the outdoor-to-indoor scenario. This work presents O2I ray-tracing
simulations utilizing a complete office building floor plan in the form of a
laser-scanned point cloud. The simulated radio channels are compared to their
measured counterparts at 4 and 14 GHz in terms of path loss and delay and
angular spreads. Validation of channel simulations for the O2I case is rare,
and so far non-existent for above-$6$~GHz bands. This work reveals the
importance of a floor plan model in accurately simulating the channel; it is
confirmed that path loss can be replicated with a simple interior path loss
model in place of a detailed building interior model, but neglecting to model
the interior results in high delay and angular spread errors. By modeling the
interior, the ray-tracing simulations achieve relative mean error of under 10%
for delay and angular spreads. Finally, effects of multi-layer insulating
window on propagation simulations are reported. Noticeable variation of the
penetration loss on a small change of the incident angle of a propagation path
causes large changes in estimated coverage.
