Research And Implementation Of LTE Multimode Data Card Network Access Module

Along with the development of the LTE network technology, more and more users use the mobile terminal to communicate with each other by the LTE network. The LTE multimode data card, as the representative of the LTE wireless terminal, network access function becomes the first step on the user experience. Only successful stationed in the network, mobile terminals to carry out any other business. So the research of mobile terminal network access process and realizing the corresponding function can provide important guarantee of its overall business.In this paper, based on Qualcomm MDM9X00platform of LTE multimode data card project as the background. First the paper presents the domestic and overseas development status of LTE network system,LTE technology, LTE system architecture and the basic knowledge of LTE terminal and network interactions, then the paper builds the system development environment and designs the system through the LTE multimode data card overall requirements analysis. Next by the analysis of network access process of terminal, the paper completes the research and implementation of LTE multimode data card network access module. The network access module is mainly used the implementation mechanism of AT extension command, this implementation mechanism has the characteristics of convenient to expand and high flexibility. Finally, the LTE multimode data card network access module has been tested and analyzed, and the results show that the function and performance of this module meets the design requirements.Now, the LTE multimode data card project has been developed and put into the American and European markets for commercial business. It receives a good market reflection.