  In order to achieve stable and reliable industrial manufacturing, wireless
networks must meet the stringent communication requirements of industrial
automation, particularly the need for deterministic low latency communication.
The limited wireless resources and time-varying fading channel contribute to
the random fluctuations of transmission delay, making it challenging to realize
delay-deterministic wireless networks. An open challenge in this context is to
model delay determinism, also known as jitter, and analyze delay performance.
In this paper, we model jitter as the variance of delay and conduct a
comprehensive analysis of delay performance. Specifically, we consider two
transmission regimes: infinite blocklength (IBL) and finite blocklength (FBL).
In the IBL regime, the distribution of the transmission delay is analyzed, and
the closed-form expressions for the average delay, jitter, and delay violation
probability are derived. In the FBL regime, an upper bound on the transmission
delay is first approximated at a high signalto-noise ratio. Based on this upper
bound, the delay distribution, delay violation probability, average delay, and
jitter are derived. Finally, simulation results are provided to validate the
accuracy of the analysis and derivations. Additionally, the impact of system
parameters on jitter is analyzed to gain further insights.
