TD-LTE系统ESM层默认承载建立过程的研究与实现

Research and Implementation of the Process of Default Bearer Establishing in the ESM layer in TD-LTE system

3GPP组织启动了长期演进(LTE)与系统框架演进(SAE)项目。针对未来数据业务高速、突发性的特征,LTE会话管理子层引入了新的QoS机制,即默认承载,当UE附着到网络的同时为该UE建立一条固定速率的承载,提升用户的业务特性。在设计开发上,引入了SDL与TTCN协仿真对ESM代码进行仿真测试,通过默认承载建立过程的协议流程与MSC做对比,实现了预期的目标。

The 3GPP Organization launched Long Term Evolution （LTE） and System Framework Evo- lution （SAE） project. Based on the characteristics of future high-speed data services, a new QoS mecha- nism, i.e. the default bearer, is introduced to estab- lish a fixed rate of bearer while the UE attached to the network, to enhance user＇s service features. In the design and development, co-simulation of SDL and TYCN is introduced for simulation test. Com- pared to the process of default bearer establishing, MSC can achieve the desired obiectives.