EPS系统的QoS机制

为了适应未来10年移动通信技术的发展，给用户不断增强的数据业务需求提供更好支持，3GPP组织启动了长期演进计划（LTE）与系统框架演进（SAE）研究项目。针对未来数据业务具有高速、突发性的特征，演进的分组系统（EPS）对服务质量（QoS）机制进行了诸多改进与增强，通过引入默认承载、聚合资源调度等概念，真正实现了用户的“永远在线”，提高了业务的数据速率，进而最终提升了用户体验。同时，针对未来UTRAN与E-UTRAN网络之间的互操作场景，设计了EPS的QoS等级标识（QCI）参数与通用移动通信系统（UMTS）QoS参数之间的合理映射。

QoS Mechanism in Evolved Packet System

For adapting the development of mobile communication technology in the next 10 years,and providing support for the enhancing data services continually,3GPP organization began to the Long Time Evolution(LTE)/System Architecture Evolution(SAE) research project.Considering the character of high-speed and bursting data services,the Evolved Packet System(EPS) makes many improvements in the Quality of Service(QoS) scheme.With application of the default bearer,aggregate resources scheduling technologies,the EPS actually realizes the users' "always-online",improves the operational data rate and enhances the user experience ultimately.At the same time,for the inter-operation scene between E-UTRAN and UTRAN,this system designs the mapping of EPS QoS Class Identifier(QCI) and Universal Mobile Telecommunications System(UMTS) QoS parameters.