Queuing systems with limited resources, in which customers require a device and a certain amount of limited resources for the duration of their service, proved their effectiveness in the performance analysis of modern wireless networks. However using queuing systems leads to complex calculations. In this paper, we propose a method for approximate analysis of queuing systems with limited resources and signals that trigger resource reallocation of customers. The results of approximate analysis were compared with simulations of the initial model. ©ECMS Mauro Iacono, Francesco Palmieri, Marco Gribaudo, Massimo Ficco (Editors).