ICS 33.060.99 M 36 中 华 人 民 共 和 国 通 信 行 业 标 准 YD/T ××××—×××× YD/T 基于LTE技术的宽带集群通信（B-TrunC） 系统（第二阶段）接口技术要求 集群基站 与集群核心网间接口 Technical requirements for interface between trunking eNB and trunking core network of LTE based Broadband Trunking Communication (B-TrunC) system (Phase 2) (报批稿) ××××-××-××发布 ××××-××-××实施 中华人民共和国工业和信息化部 发 布YDYD/T XXXX—XXXX I目  次 前言 .......................................................................................................................................................... III 1 范围 ................................................................................................................................................................. 1 2 规范性引用文件 .............................................................................................................................................. 1 3 术语、定义和缩略语 ....................................................................................................................................... 1 3.1 术语和定义 ........................................................................................................................................................ 1 3.2 缩略语 ................................................................................................................................................................ 1 4 概述 ................................................................................................................................................................. 2 4.1 接口功能 ............................................................................................................................................................ 2 4.2 接口协议栈 ........................................................................................................................................................ 2 4.3 层一 .................................................................................................................................................................... 3 4.4 信令传输 ............................................................................................................................................................ 3 4.5 应用协议 ............................................................................................................................................................ 4 4.6 数据传输 ............................................................................................................................................................ 4 5 S1-T接口过程 ................................................................................................................................................... 4 5.1 S1-T AP服务 ....................................................................................................................................................... 4 5.2 S1-T基本过程 ..................................................................................................................................................... 4 5.3 S1-T集群过程 ..................................................................................................................................................... 6 5.4 组呼上下文管理过程 ........................................................................................................................................ 8 5.5 集群承载管理过程 .......................................................................................................................................... 13 5.6 寻呼过程 .......................................................................................................................................................... 17 5.7 直传消息过程 .................................................................................................................................................. 17 5.8 集群组短数据传输消息 .................................................................................................................................. 18 5.9 切换过