The Research On Data Management Technology Based On Mobile Agent In The Mobile Computing Environment

Mobile computing environment has remarkable characteristics including mobility, frequent disconnection, variety of bandwidth, scalability, weak reliability, dissymmetry of communication, battery power restrictions, etc, which brings new challenges to data management. How should the disconnection of mobile host be handled? How should the handoff transactions be processed? How should the location dependent data be managed? How could the utilization of resources and the performance be improved?Based on the systematic analysis and comprehensive summarization of the relevant work on data management in mobile computing environment, this dissertation researches three primary fields in depth, illustrating the author's creative viewpoints so as to make important breakthroughs. The innovations in this dissertation are mainly as follows:1. A new architecture of data management architecture base-on mobile agent(DMABMA) in mobile computing environment is presented. It adopts the framework of MSS-Agent and Mobile-Agent, which through insertion of agent, divides the mobile computing environment into two part: traditional distributed network and wireless network. so that we could select the optimal method to solve different problem for different networks to improve the performance of the whole system.2. A new strategy of cache invalidation schema base-on mobile agent(CISBMA) is presented. It can be used to solve many the problems resulting from the disconnection of mobile host in mobile computing environment, and can make up for the defects of the limited bandwidth and weak reliability of the wireless network through the high bandwidth and high reliability of the fixed network. This strategy is intended to be applied to the common mobile networking and has preferable practicability.