Research On The Development Method Of Intelligent Transportation Systems (ITS) Architecture

As many complicated systems analysis, intelligent transport systems (ITS) whichcut across many technology areas and departments, need some theories and methodsin guiding the development of ITS architecture, to ensure the architecture to begeneral, logical, and strict, and so it can guide regional ITS planning, and ITSstandards setting and systems design. So author will discuss guidelines and keyquestions for ITS architecture development, and make a research on the application ofdesign structure matrix (DSM) in forming physical elements. To two architecture development methods: process-oriented method and object-oriented method, this paper analyses them used in ITS logical function decompositionand physical system elements combination, then concludes that the different methodsmake little effect on ITS architecture, so choice of development method can be basedon the two methods characters which listed in this paper, and architecturedevelopment workers' knowledge background and so on. On the proceeding of ITS architecture development, this paper pays attention tosome key questions, including the constitutes of ITS architecture, the principles ofconfining ITS terminals, the rules of developing logical architecture, and physicalarchitecture flows. Thereinto, based on the new concept –applicable system whichgiven in the Chinese ITS architecture (Version 2.0), this paper analyses the applicablesystems' effects in ITS architecture, and considers that the applicable system makesITS architecture more practically. When we transform logical architecture to physicalarchitecture, we should evaluate the different methods in realizing one logical element,by this way to support combining physical elements and this paper gives a solution tothis problem. At last, this paper gives the whole development processes explicitly. Asan example, the development on the Traffic Information Services is given. Physical modeling is a process of combining several logical elements based onsome rules to physical elements. This paper used DSM method in modeling logicalelements' relationship, by analysis and calculation of DSM, we get hierarchicallogical elements and find out the kernel ones. By this method, we can get primaryphysical elements. It is proved by examples that DSM is assistant in physicalmodeling.