Design & Implementation Of The Air Space Management And Evaluation System

The Air Space Management and Evaluation System (ASMES) is a scheming project of General Administration of Civil Aviation of China and it is proposed and used by the Airspace Layout Department. Because the system is composed of many algorithms and technologies, it is jointly accomplished by four units, which are Aviation Data Communication Corporation, Wisesoft Company, Civil Aviation University of China and Nanjing University of Aeronautics and Astronautics. Wisesoft Company carries on the tasks of software design and system integration.This paper discusses the design and implementation of ASMES based on the technology of three-tier architecture and middleware. Because of using three-tier architecture and the technology of middleware, the problem that how to finish system integration is solved. These technologies ensure the system is extendable at the condition of different units and different developing environments. At the same time, they harmonize each part of the system. They ensure that not only each step of development is synchronous, but also the system has top-quality and can be finished on time.At first, this paper gives a brief introduction of ASMES and the integrated design of the system according to the requirement of it. Then, We analyze and explain each critical technology in the system. Finally, we give the detailimnlementation of nrimary middleware relevant module and system inteorationbased on these technologies. It mainly consists the following 4 parts:Firstly, we introduce ASMES briefly and analyze the development situation ofthis domain in our country and the others. It is shown that the study and design of ASMES is imperative under the situation.Secondly, we mainly analyze and design the system's software environment, physical structure, functional modules and the logical structure. We choose software environment of the system according to the requirement. It includes operating system, DBMS and GIS. By evaluating the characteristics of the system, we design the hardware and network environment. Meanwhile, we summarize each functional module of the system, and give the methods to implement them. At last, we design the logical structure of the system.Thirdly, according to the integrated design of ASMES, we confirm the critical technologies of the system. They include three-tier architecture, middleware and the correlative technologies of database, such as the technology of nested table and the programming implementation of data exchange between the database and another one. Then, we illustrate and analyze these technologies.Fourthly, the implementation of the primary middleware and the relevant module is analyzed in details. The primary middleware include the middleware of the database, the middleware of GIS, the middleware of the report, and so on. The relevant module is mainly composed of the module of database maintenance. At last, we discuss the concrete implementation of system integration.The method of design & implementation in this system is an effective and useful one. It can solve the problem when the project is faced with different units, different developing environments and the long time to perfect the project. This method is useful for reference to design similar systems. With the accomplishment of this system, the level of airspace management and evaluation is improved, and the means of airspace management and evaluation is enhanced. At the same time, the general protective ability of airspace management system can be improved.