文档对数据传输协议和相关的通过S1接口建立用户平面传输承载的信令协议进行了详细的说明。
The present document specifies the standards for user data transport protocols and related signalling protocols to establish user plane transport bearers over the S1 interface.
本文将IP业务网络系统按照功能分为三个平面承载面、信令面和业务面。
IP-based service network is divided into three planes, bearing plane, signaling plane and application plane.
从功能上分，通用多协议标签交换协议控制平面分为信令、路由和链路管理。
From the functional point of view, a GPMLS control plane can be partitioned into the following components: link management, routing, and signaling.
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