Fig. 1
From: Performance analysis of ultra-reliable short message decode and forward relaying protocols
System model for relaying with a source, destination, and a decode-forward relay. This figure illustrates the system model for cooperative decode-and-forward relaying scenario including a source, a relay, and a destination. The links between S to D, S to R, and R to D are referred as the direct link h1, broadcasting link h2 and relaying link h3 each of which with ni channel uses respectively, where i∈{S,R}