Research And Implementation Of Shenyang Metro Wireless Communication Dispatching System Based On Tetra

As the national economy's rapid development, the urban metro construction has entered a period of high tide. Guangzhou, Shanghai and Beijing have built several metro lines. The projects of metro building have started in Shenzhen, Dalian, Nanjing, Chongqing, Wuhan, Tianjin and Shenyang. The projects of metro building are planning in Hangzhou and Qingdao. The metro special wireless communicating is the only way between the fast moving trains and the operation and management organization, and has the duty of improving operating effect and keeping trains and the metro customers safe.The thesis argues Shenyang metro wireless communication dispatching system based on TETRA. EADS (European Aeronautic Defence and Space Company) advanced TETRA technology is applied in the system. The system is built on the TCS (TETRA Connectivity Server) interface platform.According to Shenyang metro situation, the Shenyang metro wireless communication dispatching system is designed and implemented on the base of analysing the domestic and overseas metro wireless communication dispatching system information. Firstly, the network topology structure is researched. Comparing the different network structure, the circle network structure is put forward and it ensures the communication transmission's safety and stabilization; Secondly, in order to improve the system reliability, the copy of the network core element is put forward and the train dispatching schemes are designed; Thirdly, the dissertation researches the handover technology and the Shenyang metro wireless communication dispatching system handover kinds and parameters are designed; Finally, there are an analysis and designs of the system and the detail implementation is given, and it proves that the designs of the system meet requirements according to emulational tests.