Research On CQT System Of GSM Network And Its Application

Along with the rapid development of mobile communication network, the new service wells up unceasingly.The mobile communication system provides more and more data, image, video and so on the multimedia service information for users .The user scale expands unceasingly, mobile communication network bearing capacity and serviceability are facing the new challenges. Particularly in the process of evolution to 3G , the network structure is more complex. In this case, each operation business will promote the network the grade of service, control operation cost of network and enhance enterprise's core competitive power , the importance of network optimization work is prominent day by day .Mobile Communication is developping very fast, so more and more people use it . At the same time the quality of mobile communication system is worsening, so the mobile communication net needs to be moptimized and upgraded.After analyzing the demand of the project CQT, we have confirmed a few functions including calling test , voice quality evaluation , GPRS attachment and GPRS detachment test and so on .Then we need to save kinds of events of the test process as well as the parameters of the net quality and upload them to FTP server that we supply for client by GPRS network . So our client can analyze them by a certain professional software that is supplied for client by ourselves too .After confirming those functions ,we have done research for demand of index .We adopt the AVR micro chips Atmega128 ,whose function is powerful and process speed is very fast . For the memory source of SRAM is limited, so we extended 64KB SRAM and 2MB FLASH. We selected Simens MC55 as wireless communication model, which is combined with AT instruction. We chose this model to realize test function because MC55 can get enough information, and it supports TCP/IP protocols, more importantly it is able to work in wide temperature scope.The system is controlled by terminal, auto upload and download files which can be executed .SMS command can control the system too. Those advantages get out of trouble in traditional manual work .The system can supply lots of valuable external data for our client, and those data is key foundation for mobile communication network optimization.