注意看图里面连接手机、4G基站和4G核心网的各有一条实线和一条虚线。其中虚线代表控制面,实线代表用户面。控制面就是用来发送管理、调度资源所需的信令的通道。用户面直观理解就是发送用户具体的数据通道。用户面和控制面是完全分离的。
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