Analysis On E Interface Of GSM-R System And Research On Inter-MSC Handover

As a special railway communications technology, GSM-R is now increasingly widely used in the field of the world railway, and contributes to the development of railway industry. With the development of high speed railway and passenger dedicated railway, GSM-R is developing fast in China. Various applications has been experimented on different lines.Along with GSM-R development in China, the construction of GSM-R core node is under way according to the railway development plan, the core net node MSCs will become interconnected instead of being isolated. It is possible for trains to pass several MSCs region, to execute inter-MSC handover and inter-MSC subsequent handover, therefore, it is essential to research on the E interface between MSCs and inter-MSC handover problems.Firstly, this paper analyzes the network organization,protocol stack,services principle and signaling flow ,especially the inter-MSC handover principle ,of E interface between MSCs. Secondly, this paper analyzes the reasons resulting handover failure, summarizes some methods to locate reason and solve problems. As highlight of this paper, a new type of fast handover algorithm applied onto high-speed railway is presented, analysis is made on implementation methods and performance of this algorithm, comparison to the normal handover algorithm is also made to indicate the role and value on shortening the handover time-delay of the fast handover algorithm.