In the framework of the ANR ARBurst, the COST action IRACON and the ERC Consolidator Project WILLOW, we organize a workshop in April 2019, in conjunction with IEEE WCNC 2019 that will be held in Marrakech, Morocco. The workshop theme is dedicated to mathematical tools enabling to address the upcoming challenges of the performance modelisation of IoT networks. The paper submission is now opened here. For more details on the workshop, please refer to the CFP and to the workshop website.