Abstract: USM mobile communication network system is currently a public wireless digital transmission system which has most extensive coverage, the highest reliability, maximum capacity, and strong confidentiality. GSM communication system realizes data transmission in vehicle unit and the monitoring center. The performance of vehicle positioning system plays a very important role. LSPN is capable of making theoretical analysis. To study GSM communication module work mode and analyze the performance of mobile communication network, preliminary exploration with examples using real-time UML state machine and LSPN were presented.

Key words: USM, LSPN, Steady-state analysis