The GSM-R communication technology is a dispatching communication system designed specially for the railway. It's based on the GSM cellular communication system, which adds the elements of train dispatching function and fits for high speed environment. How to apply GPRS into the GSM-R network nowadays is a hot problem in the field of railway communication. Meanwhile, the application on the railway focuses on the following problems: how to ensure that the packet data can be transmitted in a safe and reliable way on the railway; and how great the blind area will influence the performance of GPRS in GSM-R network.First of all, the thesis introduced the application of the packet data service in the GSM-R network and the solution of transmission. Then the mobility management and the session management of the GPRS MS are analyzed, as well as the related timer involved. Secondly, based on the the laboratory of GPRS network, the various situations of MS entering to the blind area and backing to the coverage was simulated.
