呼叫流程
新人,请教GSM系统的 主叫和被叫流程?
1. Um接口上手机主叫信令流程
Channel Request 信道请求(请求分配SDCCH信道,通过RACH信道传送)
Immediate Assigment 立即指配(分配SDCCH信道,通过AGCH信道传送)
CM service Request CM业务请求SD(业务请求)
Authentication Request 鉴权请求
Authentication Response 鉴权响应
Ciphering mode Command 加密模式命令
Ciphering mode Complete 加密模式完成
Tmsi reallocation Command TMSI再分配命令
Tmsi reallocation Complete TMSI再分配完成
CM service Accept CM业务接受
Setup 建立(上报被叫号码,通过SDCCH信道传送)
Call proceeding 呼叫进程(呼叫开始指令)
Assignment Command 指配命令SD(信道指配指令)给MS分配TCH
Assignment Complete 指配完成FACCH(信道指配完成)TCH
Alerting 提醒(被叫振铃,通过SACCH信道传送)
Connect 连接(接通,通过FACCH信道传送)
Connect ack 连接证实(确认)FACCH
Disconnect 断开连接(主叫挂机,通过FACCH信道传送)
Release 释放请求(信道释放,通过SACCH信道传送)
Release complete 释放完成
Channel release 信道释放
2. Um接口上手机被叫信令流程
Paging request PCH
Channel Request RACH
Immediate Assigment AGCH
Paging Reponse
Authentication Request
Authentication Reponse
Ciphering mode Command
Ciphering mode Complete
Tmsi reallocation Command
Tmsi reallocation Complete
s
Setup
Call Comfirmed
Assignment Command
Assignment Complete
Alerting
Connect
Connect ack
Disconnect
Release
Release complete
Channel release
这些是我平时整理出来的,希望对你有用