Connecting wireless sensor networks (WSN) by the air becomes attractive due to advances in Satellites and Unmanned aerial vehicle (UAV). This work focus on specification and simulation of situations where several distant WSN have gateways visited periodically by a mobile on a static path. To develop and evaluate collection and control services, it is first needed to run system level simulation. This paper reports on producing automatically representations of complex topology where mobile cooperate with sensor fields with respect to timing constraints from both sides. Simulation programs are produced for graphic accelerators (GPU), and concurrent process architectures.