TD-LTE系统信令流程仿真平台设计

Design of TD-LTE system signaling flow simulation platform

时分长期演进（TD-LTE）系统中,信令作为终端与核心网之间的控制信息,承担着终端与核心网间状态交换、释放链接、发起寻呼等重要功能。在研究TD-LTE系统控制面协议栈各层协议的基础上,设计了TD-LTE系统信令流程仿真平台,可实现对开机附着信令流程、用户设备（UE）发起服务请求流程和寻呼流程3种信令流程仿真。该仿真平台中每条信令严格按照TD-LTE系统控制面协议栈LTE-Uu接口与S1-MME接口定义过程传输。各层协议与功能采用模块化设计,具有较好的可扩展性。通过抓取基站中的真实信令数据作为仿真平台的输入数据,经过各层协议处理,动态展示LTE-Uu接口与S1-MME接口信令流程。

In the TD-LTE system,signaling serves as the control information between the terminal and the core network,and plays an important role in exchanging status,releasing links,and initiating paging between them.Based on the research of protocols of TD-LTE system control plane protocol stack,this paper designs the signaling flow simulation platform of TD-LTE system,which can realize the simulations of the three signaling process of attachment process,UE initiating the service request process and the paging process.Each signaling transmission in the simulation platform is strictly in accordance with the definition of the LTE-Uu interface and the S1-MME interface of the TD-LTE system control plane protocol stack.The protocol and function of each layer adopt modular design,with good scalability.By grasping the real signaling data in the base station as the input data of the simulation platform,the simulation platform can dynamically display the signaling flow of the LTE-Uu interface and the S1-MME interface which are processed by each layers of TD-LTE protocol.