Research On L Interface IOT Test Of China Railway GSM-R Network

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. As GSM-R Network layout and construction begins, the interoperation of defferent equipments becomes more and more important.It's the first time such a large-scale testing of L interface-between Intelligent Network SCP and MSC/SSP. So there is not normal test specification and related technic specification to rely on. And many problems about realization bifurcation come out.Basing on the deep analyzation and research on the GSM-R integrate digital communication network IOT test which last for one year, this paper bring forward the ecaluation criterion of L interface test cases, and form a a suit of more integrity and reasonable test cases on L interface, consummating the test cases by landscape and portrait orientation. Secondly, the paper research on the key points on L interface, including test methods and L interface protocol analyze and key service IOT analyze. According to the classification of test cases, summarize all possible problems come out when testing, and put forward the corresponding resolvent. The protocol exists in the specification just mentions the name, while the protocle this paper particularly describes is the research harvest basing on a great deal of testing, to fill up the bland of the specification in existence.This paper analyze the whole process of L interface tesing, from designing test cases to how to test, and lastly how to resolve the problems comes out, including bring forward the new resolvement of the testing problems left. The research harvest can be used to engineering reference and guidance of GSM-R GSM-R digital communication network IOT L interface testing.