信令流程定义

1、信令流程定义1、GSM（1）掉话（既没有Disconnect，也没有Release,则视为掉话）Paging Request（呼叫请求）f Channel Request （信道请求）f Immediate Assignment （立即分配）f CM Service Request （呼叫管理服务请求）f CM Service Accept （呼 叫管理服务接入）f Setup （建立）f Assignment Command （分配信令）f Assignment Complete （分配完成）f Connect （连接）/Alerting （振铃）f System Information T

2、ype1 （系统信息）（Idle下的信息）（2）通话正常结束（Disconnect和Release都有或只有其中一个都视为通话正常结束）Paging RequestfChannel RequestfImmediate AssignmentfCM Service Request f CM Service Accept f Setup f Assignment Command f Assignment Complete f Alertingf Disconnect （断开）f Release （释放）f Release Completef Channel Release （信道释放）（3）呼叫失败

3、Paging RequestfChannel RequestfImmediate AssignmentfCM Service Request f System Information Type1 （在一次呼叫过程中，若连续出现多个 CM Service Request，则视为一次呼叫）（4）呼叫成功Paging Request fChannel Request fImmediate AssignmentfCM Service Request f CM Service Accept f Setup f Assignment Command f Assignment Complete f Conn

4、ect/Alerting（5）切换成功Handover CommandfHandover Complete（6）切换失败Handover CommandfHandover Failure2、CDMA掉话AC Origination Message RTC Service Connect Completion FTC Order Message(被叫先挂机等人为造成的掉话)或 AC Origination MessageRTC Service Connect CompletionSC Sync Message(前向业务信道丢失而造成的掉话)通话正常结束AC Origination Message

5、RTC Service Connect CompletionRTC Order Message呼叫成功AC Origination MessageRTC Service Connect Completion Message呼叫失败AC Origination MessageFTC Order Message1 一次完整被叫通话的信令流程StationMobileNetworkPaging Request 呼叫请求Channel Request 信道请求Immediate Assignment 立即分配CM Service Request呼叫管理服务请求M Service Accept 呼叫管理

6、服务接受Classmark Change 级别更新Authentication Request 鉴权请求Authentication ResponseCiphering Mode CommandCiphering Mode CompleteSetupCall ConfirmAssignment CommandAssignment CompleteAlertingDisconnectReleaseRelease CompleteChannel Release2需要注意的几点信令（1）在被叫时的Paging Request与Idle（空闲）时的Paging Request的区别在于前 者在寻呼时包含有TMSI（临时移动识别号）。（2）Ciphering Mode 为加密模式（3）在Setup之后若手机为被叫则是 Call Confirm,手机为主叫则是 Call Proceeding3关于掉话、拥塞等事件的定义对于用户来说，若在通话过程中没有Disconnect（即使有Release和Channel Release）也算是掉话。对于 Assignment Command 之后若出现的是 Assignment Failure 或