课程 MF001003 GSM BSS信令流程
ISSUE1.0
MF001003 GSM BSS信令流程ISSUE1.0
目 录
目 录
课程说明 ....................................................................................................................................... 1
课程介绍 .......................................................................................................................................1 课程目标 .......................................................................................................................................1 相关资料 .......................................................................................................................................1
第1章 位置更新 .......................................................................................................................... 2
1.1 概述 .......................................................................................................................................2 1.2 位置更新流程.........................................................................................................................2
1.1.1 周期性位置更新 ..........................................................................................................4 1.2.2 IMSI附着位置更新流程 ...............................................................................................5 1.2.3 正常位置更新流程 .......................................................................................................5
第2章 鉴权 ................................................................................................................................ 10
2.1 概述 .................................................................................................................................... 10 2.2 鉴权流程 ............................................................................................................................. 10
2.2.1 鉴权成功 .................................................................................................................. 11 2.2.2 鉴权拒绝 .................................................................................................................. 11 2.2.3 鉴权异常 .................................................................................................................. 12
第3章 BSC释放流程 ................................................................................................................ 14
3.1 概述 .................................................................................................................................... 14 3.2 正常释放流程...................................................................................................................... 14 3.3 BSC本地释放流程 .............................................................................................................. 15
第4章 移动主叫流程 ................................................................................................................. 17
4.1 概述 .................................................................................................................................... 17 4.2 正常流程 ............................................................................................................................. 17
4.2.1 Mobile originating call establishment without OACSU (early assignment) .............. 18
4.2.2 Mobile originating call establishment with OACSU (late assignment) ..................... 21 4.2.3 Mobile originating call establishment with OACSU (Very early assignment) ........... 22 4.3 异常流程 ............................................................................................................................. 23
4.3.1 随即接入、立即指配异常流程 .................................................................................. 23 4.3.2 MSC未下发Assignment request 而是直接下发Disconnect拆除呼叫 ................... 24 4.3.3 指配异常流程 ........................................................................................................... 24 4.3.4 掉话造成的异常流程 ................................................................................................ 25 4.3.5 用户挂机造成的异常流程 ......................................................................................... 25 4.3.6 MSC清除造成的异常流程 ........................................................................................ 25
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MF001003 GSM BSS信令流程ISSUE1.0
目 录
第5章 移动被叫流程 ................................................................................................................. 27
5.1 概述 .................................................................................................................................... 27 5.2 正常流程 ............................................................................................................................. 28 5.3 异常流程 ............................................................................................................................. 29
第6章 切换流程 ........................................................................................................................ 31
6.1 概述 .................................................................................................................................... 31 6.2 正常流程 ............................................................................................................................. 31
6.2.1 BSC内切换 .............................................................................................................. 31 6.2.2 BSC间切换流程 ....................................................................................................... 33 6.2.3 MSC间切换 .............................................................................................................. 34 6.3 异常流程 ............................................................................................................................. 35
6.3.1 CIC电路异常造成切换失败 ...................................................................................... 35 6.3.2 MS接入失败造成切换失败 ....................................................................................... 35
第7章 加密流程 ........................................................................................................................ 36
7.1 概述 .................................................................................................................................... 36 7.2 正常流程 ............................................................................................................................. 36 7.3 异常流程 ............................................................................................................................. 37
7.3.1 加密拒绝 .................................................................................................................. 37 7.3.2 MS不加密 ................................................................................................................ 38
第8章 呼叫重建 ........................................................................................................................ 39
8.1 概述 .................................................................................................................................... 39 8.2 正常流程 ............................................................................................................................. 39 8.3 异常流程 ............................................................................................................................. 41
8.3.1 CM业务拒绝 ............................................................................................................ 41 1.1.2 重建不允许或重建失败 ............................................................................................ 41 8.3.2 RR连接失败 ............................................................................................................. 41
第9章 直接重试流程 ................................................................................................................. 42
9.1 概述 .................................................................................................................................... 42 9.2 正常流程 ............................................................................................................................. 42
9.2.1 BSC内的直接重试 ................................................................................................... 42 9.2.2 BSC间直接重试流程 ................................................................................................ 44 9.2.3 MSC间直接重试流程 ............................................................................................... 45 9.3 异常流程 ............................................................................................................................. 45
第10章 短消息流程 ................................................................................................................... 47
10.1 概述 .................................................................................................................................. 47 10.2 正常流程 ........................................................................................................................... 48
10.2.1 SDCCH上的短消息主叫流程 ................................................................................. 48
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MF001003 GSM BSS信令流程ISSUE1.0
目 录
10.2.2 SDCCH上的短消息被叫流程 ................................................................................. 50 10.2.3 SACCH上的短消息主叫流程 ................................................................................. 52 10.3 SACCH上的短消息被叫流程 ............................................................................................ 53 10.4 异常流程 ........................................................................................................................... 53
第11章 小区广播消息流程 ........................................................................................................ 54
11.1 概述 .................................................................................................................................. 54 11.2 正常流程 ........................................................................................................................... 54
11.2.1 CBC与BSC接口的消息流程 ................................................................................. 54 11.2.2 BSC与BTS接口的消息和业务功能 ...................................................................... 57
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MF001003 GSM BSS信令流程ISSUE1.0 课程说明
课程介绍
课程目标
相关资料
课程说明
本课程为GSM系统中各种流程的介绍，是学习GSM系统的基础，对照标准的流程，可以确认、判断系统故障的原因和解决办法。主要内容有： 位置更新。详细介绍位置更新流程。
? 鉴权。详细介绍鉴权流程。 ? 释放流程。详细介绍释放流程。 ? 移动主叫流程。详细介绍移动主叫流程。 ? 移动被叫流程。 详细介绍移动被叫流程。 ? 切换。详细介绍切换流程。 ? 加密流程。详细介绍加密流程。 ? 呼叫重建。详细介绍呼叫重建流程。 ? 直接重试。详细介绍直接重试流程。 ? 短消息。详细介绍短消息流程。 ?
小区广播。详细介绍小区广播流程。
完成本课程的学习后，您应该能够：
? 掌握各种呼叫流程的基本顺序 ?
掌握各流程的关键点
《BSS信令分析手册》V4.0
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