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3GPP TS 36.401 V12.2.0 要点总结
3rd Generation Partnership Project;
Technical Specification Group Radio Access Network;
Evolved Universal Terrestrial Radio Access Network (E-UTRAN);
Architecture description (Release 12)
The present document describes the overall architecture of the E-UTRAN, including internal interfaces and assumptions on the radio, S1 and X2 interfaces.
这个规范描述了E-UTRAN的整体架构，包括内部接口、S1/X2接口
The general principles guiding the definition of E-UTRAN architecture as well as the E-UTRAN interfaces are the following:
下面的一些基本原理指导着E-UTRAN架构和E-UTRAN接口的定义：
- Logical separation of signalling and data transport networks.
- 信令和数据传输网络的逻辑分离
- E-UTRAN and EPC functions are fully separated from transport functions. Addressing scheme used in E-UTRAN and EPC shall not be tied to the addressing schemes of transport functions. The fact that some E-UTRAN or EPC functions reside in the same equipment as some transport functions does not make the transport functions part of the E-UTRAN or the EPC.
- E-UTRAN和EPC功能被传输功能完全分离。在E-UTRAN和EPC上使用的寻址机制不应该与传输功能的寻址机制相关联。但是事实上，一些E-UTRAN或EPC功能存在于同一个设备，所以一些传输功能不区分E-UTRAN或EPC的传输功能部分。
- Mobility for RRC connection is fully controlled by the E-UTRAN.
- RRC连接的移动性全部由E-UTRAN来控制
- When defining the E-UTRAN interfaces the following principles were followed:
- 当定义E-UTRAN接口时，下面一些规范应该遵守：
The protocols over Uu and S1 interfaces are divided into two structures:
在Uu和S1接口的协议被分为了两部分：
- User plane protocols 用户面协议
These are the protocols implementing the actual E-RAB service, i.e. carrying user data through the access stratum.
他们是用来实现实际的E-RAB服务的协议，例如，接入层携带用户数据
- Control plane protocols 控制面协议
These are the protocols for controlling the E-RABs and the connection between the UE and the network from different aspects (including requesting the service, controlling different transmission resources, handover etc.). Also a mechanism for transparent transfer of NAS messages is included.
他们是用来控制E-RAB和在UE和网络之间不同方面（包括请求服务、控制不同传输资源、切换等）连接的协议，并且也包含NAS消息的透传机制。
Figure 5.2-1: S1 and Uu user plane
Figure 5.3-1: S1 and Uu control plane
Figure 6.1-1 Overall architecture
- Transfer of user data 用户数据的传输
- Radio channel ciphering and deciphering 无线信道的解密和解密
- Integrity protection 完整性保护
- Header compression 头压缩
- Mobility control functions: 移动性控制功能
- Handover 切换
- Dual Connectivity 双连接
- Inter-cell interference coordination 小区间干扰消除
- Connection setup and release 连接建立和释放
- Load balancing 负载均衡
- Distribution function for NAS messages NAS消息的分发功能
- NAS node selection function NAS节点选择功能
- Synchronization 同步
- Radio access network sharing 无线接入网络共享
- MBMS function MBMS功能
- Subscriber and equipment trace 用户和设备跟踪
- RAN Information Management (RIM) 无线接入网信息管理
- Paging 寻呼
- Positioning 定位
- Delivery of warning messages 警告消息的传送
Figure 11.1-1: General protocol model for E-UTRAN interfaces
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原文地址：http://www.cnblogs.com/LearnFromNow/p/4793563.html
