This paper presents an original development methodology for the use of SystemC to model an executable model of a wireless network system. SystemC methodology allows the model to be reconfigurable for extensive early architectural analysis and easy re-mapping to new wireless standards and applications at numerous levels of abstraction. On the other hand network protocols have many complex concurrent and distributed characteristics, thus it is very difficult to be analysed theoretically. One of the most promising solutions to this problem is system-level modelling and simulation, which has been covered in this work. Performance results for the simulations as well as development effort are presented thus showing how this methodology is well suited to the modelling of a wireless network systems. Moreover the experiences of using SystemC design methodology to analyse the performance properties of wireless network are presented.