  A point-to-point communication is considered where a roadside unite (RSU)
wishes to simultaneously send messages of enhanced mobile broadband (eMBB) and
ultra-reliable low-latency communication (URLLC) services to a vehicle. The
eMBB message arrives at the beginning of a block and its transmission lasts
over the entire block. During each eMBB transmission block, random arrivals of
URLLC messages are assumed. To improve the reliability of the URLLC
transmissions, the RSU reinforces their transmissions by mitigating the
interference of eMBB transmission by means of dirty paper coding (DPC). In the
proposed coding scheme, the eMBB messages are decoded based on two approaches:
treating interference as noise, and successive interference cancellation.
Rigorous bounds are derived for the error probabilities of eMBB and URLLC
transmissions achieved by our scheme. Numerical results illustrate that they
are lower than bounds for standard time-sharing.
