The Resolvent Of Mobile Softswitch Network Based On GSM-R System

With the development of GSM-R network and the large-scale construction, the reliability of the network and the variety of the application is becoming more important. This thesis is based on the research with multi-connectivity mobile soft switch network as well as features of railway communication, discussing the connectivity network, signaling and call flow and the redundancy method and making design of GSM-R core network upgrade method.This thesis discusses three parts: Firstly, it analyzes different connectivity's influence to Qos of mobile soft switch network, and gives the solution of connectivity based on the feature of GSM-R network and present condition. Secondly, it describes the protocol stacks and messages of each interface, as well as the voice call flow procedure. Thirdly, it analyzes the redundancy methods using parameter RPO & PTO, and gives a solution of MSC server redundancy with the network design and traffic forecasting of GSM-R system. Finally, we make analysis about the safety and reliability of the upgrade solution, offering reference to GSM-R development in high speed environment.