GSM信令流程(英文)

1、MSBSCChannel activation ackChannel activationEncryption commandChannel requiredComplete Layer 3 Info.Authentication requestCall proceedingCipher Mode CompleteSABM(cm_serv_req)Immediate assign commandestablish indicationBTSChannel requestUA(cm_serv_req)Cipher Mode CommandImmediate assignment MSCAuthe

2、ntication responseSetupCipher Mode CommandCipher Mode Complete主叫流程之一主叫流程之二MSBSCBTSMSCAssignment RequestChannel activation ackAssignment commandestablish indicationAssignment CompleteAssignment CompleteDeactivate SACCHRelease requestRelease confirmRF Channle releaseRF Channel release ackAlertingConne

3、ctConnect acknowledgeSABMUAChannel activationMSBSCBTSMSC主叫流程之三Channel ReleaseRelease CompleteReleaseClear CommandRF Channle releaseDISCDeactivate SACCHRF Channel release ackRelease IndicationUADisconnectClear Complete被叫流程之一MSBSCBTSMSCChannel activation ackChannel activationEncryption commandChannel

4、requiredComplete Layer 3 Info.Authentication requestCall confirmCipher Mode CompleteSABM(pag_resp)Immediate assign commandestablish indicationChannel requestUA(pag_resp)Cipher Mode CommandImmediate assignment Authentication responseSetupCipher Mode CommandCipher Mode CompletePaging CommandPaging Req

5、uestPaging被叫流程之二MSBSCBTSMSCAssignment RequestChannel activation ackAssignment commandestablish indicationAssignment CompleteAssignment CompleteDeactivate SACCHRelease requestRelease confirmRF Channle releaseRF Channel release ackAlertingConnectConnect acknowledgeSABMUAChannel activationMSBSCChannel

6、activation ackChannel activationEncryption commandChannel requiredComplete Layer 3 Info.Authentication requestTMSI reallocation completeCipher Mode CompleteSABM(loc_upd_req)Immediate assign commandestablish indicationBTSChannel requestUA(loc_upd_req)Cipher Mode CommandImmediate assignment MSCAuthent

7、ication responseLocation updating acceptCipher Mode CommandCipher Mode Complete位置更新流程之一MSBSCBTSMSC位置更新流程之二Channel ReleaseClear CommandRF Channle releaseDISCDeactivate SACCHRF Channel release ackRelease IndicationUAClear CompleteMSBSCBTS1BTS2内部切换流程Channel activationChannel activation ackMeasurement r

8、esultHandover commandMeasurement reportHandover accessHandover completeSABMUAHandover completeHandover performed (to msc)Physical informationestablish indicationHandover detectionMSMSCBSS1BSS2外部切换流程Handover requestHandover requiredHandover request ackHandover commandHandover accessHandover completeS

9、ABMUAHandover completeClear completePhysical informationHandover detectClear command信道请求(Channel Request) ESTABLISHMENT CAUSE(36bit) RANDOM REFERENCE(52bit) Request Referenc(包括random reference 和部分帧号) Access Delay(BTS测量得到的时延)信道激活(Channel Activation) Channel number Activation type(3bit,立即指配、指配、切换等) Ch

10、annel Mode(表示话音、数据或信令，以及相应属性) Channel Identification(绝对频道号或跳频参数) Handover Reference(条件：切换) Timing Advance(条件：小区内信道改变)信道激活证实(Channel Activation Ack) Frame Number立即指配命令(Immediate assign command) Full Imm. Assign Inf: IMMEDIATE ASSIGN : IMMEDIATE ASSIGN EXTENDED: IMMEDIATE ASSIGN REJECT立即指配(Immediate A

11、ssignment) Page Mode(正常寻呼、扩展寻呼、寻呼重组、不变) Channel Description(信道、绝对频道号或跳频参数) Request Reference Timing Advance Mobile AllocationCM业务请求(CM service request) CM Service type(移动主叫、紧急呼、短消息业务等) Ciphering key sequence number Mobile station Classmark*发射功率等级 *支持的加密算法*伪同步能力*短消息能力等 Mobile Identity鉴权请求(Authenticat

12、ion request) Ciphering key sequence number Authentication parameter RAND鉴权响应(Authentication response) Authentication parameter SRES加密模式命令(Cipher mode command) Encryption Information Cipher Response Mode (可选项，响应消息中是否包含IMEI)加密模式完成(Cipher mode complete) Mobile Equipment Identity (可选项) Chosen Encryption

13、 Algorithm (可选项)建立(Setup) Bearer capability : 信息传送能力、方式 : 编码标准等 Called party BCD number CC capabilities(移动台是否支持DTMF)指配请求(Assignment Request) Channel Type : speech/data indicator : channel rate and type: speech encoding algorithm or data rate & transparency indicator Priority Circuit Identity Code指配命令(Assignment Command) Channel Description(信道、绝对频道号或跳频参数) Power command指配完成(Assignment Complete) RR Cause (可选项) Circuit Identity Code (BSS分配电路时使用) Cell Identifier (小区改变时使用) Chosen Channel(选择信道速率/类型时使用) Chosen Encryption Algorithm(改变加密算法时使用) Circuit Pool(存