  We consider a dual-hop wireless network where an energy constrained relay
node first harvests energy through the received radio-frequency signal from the
source, and then uses the harvested energy to forward the source's information
to the destination node. The throughput and delay metrics are investigated for
a decode-and-forward relaying mechanism at finite blocklength regime and
delay-limited transmission mode. We consider ultra-reliable communication
scenarios under discussion for the next fifth-generation of wireless systems,
with error and latency constraints. The impact on these metrics of the
blocklength, information bits, and relay position is investigated.
