The paper is mainly about the research and application of monitoring system of the quality of service for railway businesses based on the SLA.The process of SLA management applied in GSM-R Integrated Network Management System can be divided into three phases: the preparatory phase of business data, the implementation phase of SLA management and the maintenance phase of business management. After the discussion of theories and technologies about SLA, the paper studies three phases of SLA management respectively. First of all, the work of preparation phase is analysis and arrangement of the business data so that it is convenience to implement SLA management. The article analyzes kinds of businesses of GSM-R system and classifies these businesses according to business requirements. Every business has its appropriate indicators of SLA which is set thresholds value or ranges. Secondly, the technologies related to SLA management is introduced to business management in the implementation phase, in order to achieve the management of the quality of service of railway businesses. The article presents a monitor method of quality parameters in the GSM-R system, studies the process of calculating the SLA parameters and monitoring algorithms, designs architecture of the SLA management system, and analyzes functions of each module and operational process.
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