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在CSFB方案部署时,现网中多网络配合给TD-LTE网络维护提出了新的挑战,亟需建设一套CSFB语音业务监测系统来加强LTE网络维护能力。结合我省现网已实现Ao IP的实际情况,本文提出了一种基于A接口仿真的CSFB信令流程监测方法。该方法通过构建BSC仿真模块实现对A over IP接口的仿真,配合移动业务仿真监测系统的e Node B仿真模块,实现CSFB仿真测试对回落到2G网络的支持;结合RNC仿真模块,形成CSFB回落2G/3G网络的全面支撑和实时监测;利用移动业务仿真监测系统的BSC仿真模块、RNC仿真模块、e Node B仿真模块模拟2G/3G/4G多模终端,实现多网络配合下的4G回落过程及多场景下返回4G网络流程的仿真测试。
In the deployment of CSFB solution, multi-network cooperation in the existing network poses new challenges for TD-LTE network maintenance. It is imperative to build a CSFB voice service monitoring system to enhance the LTE network maintenance capability. Combined with the fact that our province's network has realized Ao IP, this paper presents a CSFB signaling flow monitoring method based on A interface simulation. The method realizes simulation of A over IP interface by constructing BSC emulation module and cooperates with e Node B emulation module of mobile service emulation monitoring system to realize CSFB emulation test back to 2G network; combining RNC emulation module to form CSFB fall-back 2G / 3G network and full support and real-time monitoring. The BSC emulation module, the RNC emulation module and the e Node B emulation module of the mobile service emulation monitoring system are used to simulate the 2G / 3G / 4G multimode terminal, Multi-scene return 4G network simulation test process.