TD-LTE系统连接建立过程的研究与实现

摘要

In the hierarchical structure of the protocol stack LTE,the layer of RRC (Radio Resource Control) locates in the third layer which belongs to control plane,and the control function of RRC has an important influence on the performance and behavior of LTE system.Meanwhile,RRC establishing connection in the whole process is an important link in the communication process.RRC connection is set up among different network terminals on the same layer.This paper makes the detailed description about the implementation process of RRC connection establishment process based on network,and reasonable design on the properties of RRC layer protocol.It presents the detailed introduction methods about the design idea of SDL which taking RRC connection establishment process as an example.Meanwhile,it shows validation results of all design by using the tool of TTCN.%在LTE协议栈的层次结构中,无线资源控制(RRC,Radio Resource Control)层位于第三层属于控制平面,RRC控制功能对LTE系统的性能和行为有着重要影响,同时RRC连接建立过程是在整个通信过程中一个重要环节.RRC连接建立过程是网络端和终端对等层之间的建立,基于网络端的RRC建立过程详细描述其实现流程,对RRC层协议特性进行合理的设计和实现.使用SDL与C代码相结合的方法进行具体实现,同时详细介绍以RRC连接过程为例所使用的SDL设计的思想方法以及对设计的结果采用TTCN工具进行测试验证并得出相应结果.