GSM网掉话问题的研究-电子与通信工程专业毕业论文.docx

北京邮电大学工程硕士学位论文 北京邮电大学工程硕士学位论文 GSM网路优化问题的研究 RESEARCH ON GSM NETWORK DROPED CALL ABSTRACT At present GSM system has become the world’S most mature second．generation mobile communication system．With the continuous expansion of GS：M network’S scale and the improvement of USer penetration rate． call quality problems are more and more concerned by people．The problem of droped call has become the focus of attention．For the network operators．how to distribute the network resources．improve service quality and reduce the droped call also becomes the focus of the work． In view of the above situation，the author unifies the actual work and does a deep analysis on the TianJin mobile network．From the signal flow,droped_call mechanism and the solution measure ere．allthor made the classification and the reorganization． First this paper introduced the GSM network system components，signaling structures and the logic function of motorola company BS S equipment．Then by the daily statistic form and the drive test logs．the document described the expression method and the classification of the GSM droped call．The third chapter made the description on the signaling flow and the statistical principle of droped call．In the Fourth and the fi劬chaper author put forward the methods and processes of resolving various droped_call．Finally according to many year work experiences author gave some typical cases of droped_call． In brief resolution of droped call which following the start and the development of the GSM network,is the network optimization work eternal theme．Onle the people who have had clear understanding of signaling processes， equipment statistical principle，as well as network parameters Can solve all kinds of network problems includeing droped call． KEY WORD：GSM，droped call，carder，handover，signaling 北京邮电大学工程硕士学位论文 北京邮电大学工程硕士学位论文 GS