The Study And Design Of Service Capability Convergence In Service Creation Environment Of NGN

Along with the evolvement of network system structure and the development of telecommunication service requirement, the tendency of Next Generation Network (NGN) in place of traditional network has been increasingly clear and distinct. Open and convergence are the two key words of NGN, while shielding the difference of the underlying network details and providing uniform service interface for application layer are the most important targets of NGN. Therefore, service creation has become one of the most essential technologies. People have soberly realized that the fast and effective creation and deployment of value-added service is the core problem that whether NGN can be successful. This paper is try to raise the concept of service capability convergence in SCE, in order to bring new service capabilities to telecommunication domain, open up ways of service creation, and finally decrease the customized service development cycle.The paper is composed of three parts. The first part gives a brief introduction to the background, the research progress recently, and mainly introduces SCE which is based on service component and Parlay API developed by State Key Laboratory of Network and Switching Technology of Beijing University of Posts and Telecommunications in the project of national 863 Program named as "Softswitch Supporting Multimedia Service and Mobile Service". The main work of this paper is based on this system. Then the paper gives an expatiation to the concept and development condition of NGN and Service Support Environment. It introduces the SCE - an important part of Service Support Environment, and in particular the footprint of service creation technologies, including open service development interface, such as Parlay API, SIP Servlet, as well as service component.The second part raises the concept of service capability convergence in SCE, and introduces the influence which service composition brings to current service creation methods. After that, aiming at the two key components of service compositon, SIP Servlet 2 ACU and WSDL 2 ACU, the paper goes along with analyse and research, in order to bring capabilities represented by SIP protocol in telecommunication domain, as well as Web Service capabilities into SCE. Then, the paper shows a service test to WSDL 2 ACU module, analysis the result impersonality, and points out the short comings of current work.Finally, the paper summarizes the work of the author in the graduate time, and indicates the next research aspect.