gNB-CU架构图

gNB-CU-CP: 控制单元控制面板，E1 (connnected with gNB-CU-UP)，F1-C (connnected with gNB-DU)
gNB-CU-UP: 控制单元用户面板，E1 (connnected with gNB-CU-CP)，F1-U (connnected with gNB-DU)

1.gNB剥离开的架构图

A gNB may consist of a gNB-CU-CP, multiple gNB-CU-UPs and multiple gNB-DUs;
gNB可以由一个gNB-CU-CP,多个gNB-CU-UPs多个gNB-DUs组成

The gNB-CU-CP is connected to the gNB-DU through F1-C interface;
gNB-CU-CP通过F1-C连接gNB-DU

The gNB-CU-UP is connected to the gNB-DU through F1-U interface;
gNB-CU-UP通过F1-U连接gNB-DU

The gNB-CU-UP is connected to the gNB-CU-CP through E1 interface;
gNB-CU-UP通过E1接口连接到gNB-CU-CP

One gNB-DU is connected to only one gNB-CU-CP;
一个gNB-DU仅连接一个gNB-CU-CP

One gNB-CU-UP is connected to only one gNB-CU-CP;
一个gNB-CU-UP仅连接一个gNB-CU-CP

NOTE1: For resiliency, a gNB-DU and/or a gNB-CU-UP may be connected to multiple gNB-CU-CPs by approriate implementation.
为了系统弹性，一个gNB-DU和一个gNB-CU-UP可能连接到多个gNB-CU-CP

One gNB-DU can be connected to multiple gNB-CU-UPs under the control of the same gNB-CU-CP.
一个gNB-DU可以在同一个gNB-CU-CP的控制下连接多个gNB-CU-UPs

One gNB-CU-UP can be connected to multiple gNB-DUs under the control of the same gNB-CU-CP.
一个gNB-CU-UP在同一个gNB-CU-CP的控制下可以连接多个DUs

NOTE2: The connectivity between a gNB-CU-UP and a gNB-DU is established by the gNB-CU-CP using Bearer Context Management functions.
注2：gNB-CU-UP和gNB-DU连接是使用gNB-CU-CP的承载背景管理功能建立的
NOTE3: The gNB-CU-CP selects the appropriate gNB-CU-UP(s) for the requested services for the UE.
gNB-CU-CP对用户的请求服务会选择合适gNB-CU-UP（可能不止一个，不同DU实现不同功能）
NOTE4: Data forwarding between gNB-CU-UPs during intra-gNB-CU-CP handover within a gNB may be supported by Xn-U.
在gNB内的gNB-CU-CP切换期间（不是只有一个吗？？？），gNB-CU-UP之间的数据传输是通过Xn-U接口实现的