Simulation Of Data Mobile Communication System

The aim of this paper is to design a simulation system to test the functions associated with primitive of MS terminal.The technology of mobile communication is growing very fast. To meet the needs of the people, new protocols and systems have been put out continually, and so do MS terminals. To guarantee the performance, MS terminals have to be tested before they are merchandised.Traditionally, special testing equipments are used in order to test a motive station terminal. Testing equipments get the function of a BS and work like a BS. they communicate with a motive station and monitor the whole communicating process. Result is displayed. An error report will be produced if there's some mistake. With this report, the processing error of the motive station can be checked out. While, testing equipments have great limitationts as slow updating, high cost, bad flexibility and so on.To make up for the limitations of testing equipments, simulation softwares are used for testing. C/S mode is used in the testing of this kind. MS software is loaded in the client terminal, and BS in server. By the primitive exchanging between them, motive terminal can be tested. Software has many advantages. It is'flexible. Its developing period is short and can be updated easily. The simulation system can be used in multiple protocols. MS terminal equipments can be tested during the developing period. Software can be easily carried and put into use. Simulation system can be developed with a low cost.In this paper, BS based on PDC protocol is simulated for testing. Corresponding with the communication protocols, the function of the simulation system is divided into three parts: layer 1,layer 2 andlayer 3. In the program of this paper, object oriented technology is used to encapsulate the function of each layer into objects, and a managing object is constructed in order to manage and monitor these layer objects.By the interactivity between BS simulation system and MS software, MS terminal can be well tested.The structure of this paper is as follows: First part is about the communication system; Second part states the simulation system of BSS based on PDC protocol; And last part specifies how the three layers and managing objects are implemented. The emphasis is put on the last part in this paper.