  This work focuses on the performance analysis of short blocklength
communication with application in smart grids. We use stochastic geometry to
compute in closed form the success probability of a typical message
transmission as a function of its size (i.e. blocklength), the number of
information bits and the density of interferers. Two different scenarios are
investigated: (i) dynamic spectrum access where the licensed and unlicensed
users, share the uplink channel frequency band and (ii) local licensing
approach using the so called micro operator, which holds an exclusive license
of its own. Approximated outage probability expression is derived for the
dynamic spectrum access scenario, while a closed-form solution is attained for
the micro-operator. The analysis also incorporates the use of retransmissions
when messages are detected in error. Our numerical results show how reliability
and delay are related in either scenarios.
