Design And Implementation Of TETRA System On NanJing Metro L2

Beside for public wireless communication system, PMR has become the most important and rapid growing market all over the world, and plays a more and more important role in social activities. PMR performs good service to Public Safety, Metro, Ambulance, Government officials and Ports.As the leader in PMR field, TETRA occupies over half market in digital trunking field. This owns to Open Standard, Good Structure, Many system and subscriber vendors and innumerable solutions in every specific industry.The paper introduce the NanJing Metro L2 TETRA network design based on TETRA technology and MOTOROLA TETRA system,point out the doable solution on technical difficulty.Introduce current main mobile communication technology, and do compare on public mobile communication network and private mobile communication network,and introduce TETRA special transmit mode, TETRA signal specialty and used special technology, TETRA current development statusAnalyse the build up of the TETRA system and MOTOROLA Dimetra-IP system.include system network structure,system working principle and provided service. Aiming at dispatch communication in Metro.Analyse physical structure of system element,inter-connect link selection and optimization solutionRaise network structure plan,system performance analysis based on example-NanJing Metro L2. describe the whole system design process, spread the deep study on the existing engineering problem, and get the way to solve the actual problem. Based on API requirement requested from customer, analyse function requirement and API design progress, especially three TETRA standard service, classify API function realization,and point out possible solution, have a discussion on project management,risk control and TETRA network management etc involved in Metro engineering.Introduce the console API development key technology,and how the basic API function be realized using Group call example.Introduce the system test using software test method.View TETRA network operation development and network amalgamation, work out the new layout for the coming phase work.