  In this paper, we study ultra-reliable and low-latency communication (URLLC)
under fading using multiple frequency or time bins. We investigate an approach
to find an upper-bound on the packet error rate when a finite-length code is
used. From simulation results, we find that the bound is reasonably tight for
wide ranges of signal-to-noise ratio (SNR) and the number of multiple bins.
Thus, the derived bound can be used to determine key parameters to guarantee
the performance of URLLC in terms of the packet error rate.
