随着用户对业务需求的不断增长,GSM提供业务的局限性表现得越来越明显;在第三代移动通信系统中,引入了开放式业务体系结构OSA;OSA可以看作业务提供的平台,它是第三代移动通信系统中电信业务提供的一种新趋势。在OSA平台上,实现了个性化业务的提供。该文分析了GSM中业务实现的局限性,介绍了OSA的基本概念和结构,并以预付费业务为例,论述了在OSA平台上业务能力属性(SCFs)的接入和新业务的提供。 With the increasing demand from users for services, the limitations of GSM services have become more and more obvious. In the third generation of mobile communication systems, an open OSA is introduced. OSA can be regarded as a platform for service provision, It is a new trend of telecom service in the third generation of mobile communication system. OSA platform, to achieve a personalized business. This paper analyzes the limitations of service implementation in GSM, and introduces the basic concepts and structure of OSA. Taking prepaid service as an example, it discusses the access of service capability attributes (SCFs) and the provision of new services on OSA.