The paper "Analytic study of packet delay from 4G and 5G system ARQs using Signal Flow Graphs" is published at the VTC2020-Spring conference in Antwerp, Belgium.
In it, Signal Flow Graph are used to model 4G and 5G communication systems's Automatic Repeat Request (ARQ) processes, which are then analysed for the packet delay distribution.
In the matlab/ directory you can find MATLAB code for the analytic study of the modeled systems' packet delays.
In the simulation-model/ you can find simuLTE code for the simulations performed using the OMNeT++ simulator.