Design And Implementation Of LTE Simulation Platform Based On VC++

Based on the integration of mobile technology and IP technology, 3GPP started the LTE(Long Term Evolution) project.It uses orthogonal frequency division multiplexing(OFDM), multiple input multiple output(MIMO), all IP network, and other advanced technologies, which greatly improves the performance of air interface and provides users with high-quality wireless access services.LTE system can provide users with better services, but in actual deployment, it need provide high rate of data traffic with the limited power and bandwidth, therefore, how to better deploy and configure LTE system is a key problem in front of us.The common method to solve the problem is the system-level simulation; Simulating the actual environment to get reasonable planning schemes.In this thesis, on the basis of LTE communication system architecture,the LTE system level simulation is carried on the thorough research in Visual Studio 2010 environment by using effective C++ language; C++ programming ensures modularization, polymorphism, flexibility and high performance of the system.The transmission of LTE will be processed in the system level simulation.The simulation plan to simulate the uplink and downlink scheduling strategies in the environment of multi-cell / muti-user. At the same time, it takes into account the user mobility, wireless resources optimization, frequency reuse technology, adaptive coded modulation module, and other aspects related to the industry and the academic.First of all, create three nodes in the design of simulation: UE, eNodeB and MME/GW;Then, perform flow generator to support and manage digital wireless bear in the application layer;Finally, implement the common scheduling policies(such as PF, the M-LWDF and EXP), AMC scheme of CQI feedback, frequency reused technology and PHY layer model.The design of the platform can be designed for extended interface reserved, thereby increasing platform function and " reality".The more functions and complexities the platform implement, the more realistic will be. But it will also increase the complexity and time of the simulation.So we can add some functionality, or process certain functions idealistically, according to the requirements of the algorithms.LTE system level simulation platform introduced in this thesis can be used in the power control and switching strategy, resource allocation algorithm and some other system level research and validation of the algorithm and to guide the LTE system performance evaluation and the practical application of the network.