Research Of Mobility In Open System--Agent Based Computing Basic Architecture (ABCBA)

Currently, open system technology is widespreadly used in the area of system integration. Applying this technology can develop, implement, upgrade and maintain application system conveniently, that causes the cost of building system to be reduced and its productivity to be improved. However, existing open system technology cannot support applications with some important performance requirements, such as mobility, which may be used to improve collaboration or to develop high efficiency mobile network business.But recently, the coverage of mobility application is greatly increased. These systems are required to be designed with open system technology in order to shorten the development cycle and to reduce the cost. Therefore, it is necessary to study how to integrate mobility-oriented application with open system architecture. The dissertation is devoted to showing the research on this subject from both theoretical and practical points of view. The main contributions are as follows:1) According to the features of mobility-oriented systems and characteristics of open system, the influence that mobility behaviors impact on system's openness is discussed in detail. Based on the research, a conceptual model built on middleware is proposed. Then three core technologies, which are distributing object technology, modern computing model and network protocol technology and intelligent collaboration technology are focused.2) Limitations of current middleware in mobility domain are analyzed, and mobility-oriented middleware solution is given out.3) A mobility agent interoperability middleware is implemented, based on which a mobility-oriented open system architecture called ABCBA is formed, and the openness of ABCBA is verficated using ODP standard. Its performance is tested and analyzed.4) ABCBA is extended by using wireless CORBA that causes the architecture to be more adaptive in nomadic environment.5) Based on the above ABCBA, many application domain interfaces are given out and some systems such as "real-time security custody system" and "lightweight commerce system on PocketPC and mobile phone" are developed.6) Mobile agent-oriented software engineering is summaried through the design, implementation and system development in the above middleware.