A Research Of The Key Technology In Mobile Information System Based On PDA

With the rapid development of advanced PDA, wireless network and mobile database technology, a good chance has been offered to the information of mobile operation and management. Developing the industrial mobile informational system (MIS) has become the hot spot. Aiming to the industrial application attracts most of the large-scale PDA manufacturer. The paper does advanced research with system-structure of MIS.Based on given a model of MIS, advanced analysis has been done and the key characteristic & technology has been discussed in this paper. In the following, the means of line to the Internet wirelessly is talked, the technology of mobile database and mobile IP are introduced. The analysis and comparison are done to the characteristic of three typical kind of wireless data service, which are GPRS, CDMA 1X and WLAN. The technology of VPN for the data's security in the wireless environment is also discussed. The paper also provide the analysis and comparison of three typical model in sever part.In allusion to the uncertain state of PDA after it lines to the Internet, and the difficulty of exchanging information between two PDA online, this paper provide a solution of which is based on message and server's transfer. The meaning of hand-shake and self-detecting the state of line-to-internet is given to solve the problem, which the application program must be steady. The Gantt chart is used to show some information about remote mobile client. In the following, it is offered that how to create local database application program using SQL Server CE.The research technology of this paper has been successfully applied in a design of the information system of mobile operation in airport.