gsm呼叫流程大全呼叫流程大全NOKIA TELECOMMUNICATIONSchannelrequestMSBTSBSCMSCVLR establishment cause answer for paging (MTC) emergency call call re-establishment user request (MOC, SMS, suppl.service) other serives (loc. update, IMSI detach) random numberNOKIA TELECOMMUNICATIONSchannelrequestMSBTSBSCMSCVLRchannelrequiredNOKIA TELECOMMUNICATIONSchannelrequestMSBTSBSCMSCVLRchannelrequired BSC starts searching for a SDCCH channel - channel available - reservation - no channel available - blockingNOKIA TELECOMMUNICATIONSchannelrequestMSBTSBSCMSCVLRchannelrequiredSDCCH seiz att.SDCCH busy att.Ghost CCCH Res. BSC starts searching for a SDCCH channel - channel available - reservation - no channel available - blockingNOKIA TELECOMMUNICATIONSchannelrequestMSBTSBSCMSCVLRchannelrequiredSDCCH seiz att.SDCCH busy att.Ghost CCCH Res.channelactivationNOKIA TELECOMMUNICATIONSchannelrequestMSBTSBSCMSCVLRchannelrequiredSDCCH seiz att.SDCCH busy att.Ghost CCCH Res.channelactivationchannelact. ackn.NOKIA TELECOMMUNICATIONSchannelrequestMSBTSBSCMSCVLRchannelrequiredSDCCH seiz att.SDCCH busy att.Ghost CCCH Res.channelactivationchannelact. ackn.immediateassignmentNOKIA TELECOMMUNICATIONSchannelrequestMSBTSBSCMSCVLRchannelrequiredSDCCH seiz att.SDCCH busy att.Ghost CCCH Res.channelactivationchannelact. ackn.immediateassignment information included page mode timing advance channel description timeslotsubchanneltraining sequence codeRF channel number timer 3101 started in the BSCNOKIA TELECOMMUNICATIONSchannelrequestMSBTSBSCMSCVLRchannelrequiredSDCCH seiz att.SDCCH busy att.Ghost CCCH Res.channelactivationchannelact. ackn.immediateassignmentSDCCH assign. information included page mode timing advance channel description timeslotsubchanneltraining sequence codeRF channel number timer 3101 started in the BSCNOKIA TELECOMMUNICATIONSchannelrequestMSBTSBSCMSCVLRchannelrequiredSDCCH seiz att.SDCCH busy att.Ghost CCCH Res.channelactivationchannelact. ackn.immediateassignmentSDCCH assign.immediateassignmentNOKIA TELECOMMUNICATIONSchannelrequestMSBTSBSCMSCVLRchannelrequiredSDCCH seiz att.SDCCH busy att.Ghost CCCH Res.channelactivationchannelact. ackn.immediateassignmentSDCCH assign.immediateassignmentESTABLISHMENT PARTNOKIA TELECOMMUNICATIONSchannelrequestMSBTSBSCMSCVLRchannelrequiredSDCCH seiz att.SDCCH busy att.Ghost CCCH Res.channelactivationchannelact. ackn.immediateassignmentSDCCH assign.immediateassignmentCM servicerequestNOKIA TELECOMMUNICATIONSchannelrequestMSBTSBSCMSCVLRchannelrequiredSDCCH seiz att.SDCCH busy att.Ghost CCCH Res.channelactivationchannelact. ackn.immediateassignmentSDCCH assign.immediateassignmentCM servicerequest required service mobile originated call/SMS mobile terminated call/SMS location update call re-establishment IMSI detach request timer 3101 started in the mobileNOKIA TELECOMMUNICATIONSchannelrequestMSBTSBSCMSCVLRchannelrequiredSDCCH seiz att.SDCCH busy att.Ghost CCCH Res.channelactivationchannelact. ackn.immediateassignmentSDCCH assign.immediateassignmentCM servicerequestestablishindicationNOKIA TELECOMMUNICATIONSchannelrequestMSBTSBSCMSCVLRchannelrequiredSDCCH seiz att.SDCCH busy att.Ghost CCCH Res.channelactivationchannelact. ackn.immediateassignmentSDCCH assign.immediateassignmentCM servicerequestestablishindication timer 3101 stopped in the BSCNOKIA TELECOMMUNICATIONSchannelrequestMSBTSBSCMSCVLRchannelrequiredSDCCH seiz att.SDCCH busy att.Ghost CCCH Res.channelactivationchannelact. ackn.immediateassignmentSDCCH assign.immediateassignmentCM servicerequestestablishindicationSucc. Seiz. Orig.Succ. Seiz. Term.SDCCH call re est.SDCCH emerg. callSucc. SMS est.Unsucc. SMS est.SDCCH loc. update timer 3101 stopped in the BSCNOKIA TELECOMMUNICATIONSchannelrequestMSBTSBSCMSCVLRchannelrequiredSDCCH seiz att.SDCCH busy att.Ghost CCCH Res.channelactivationchannelact. ackn.immediateassignmentimmediateassignmentCM servicerequestestablishindicationSucc. Seiz. Orig.Succ. Seiz. Term.SDCCH call re est.SDCCH emerg. callSucc. SMS est.Unsucc. SMS est.SDCCH loc. updateCM servicerequestSDCCH assign.NOKIA TELECOMMUNICATIONSchannelrequestMSBTSBSCMSCVLRchannelrequiredSDCCH seiz att.SDCCH busy att.Ghost CCCH Res.channelactivationchannelact. ackn.immediateassignmentimmediateassignmentCM servicerequestestablishindicationSucc. Seiz. Orig.Succ. Seiz. Term.SDCCH call re est.SDCCH emerg. callSucc. SMS est.Unsucc. SMS est.SDCCH loc. updateCM servicerequestSDCCH assign. BSC starts to initiate signalling connection control part (SCCP) connection NOKIA TELECOMMUNICATIONSchannelrequestMSBTSBSCMSCVLRchannelrequiredSDCCH seiz att.SDCCH busy att.Ghost CCCH Res.channelactivationchannelact. ackn.immediateassignmentSDCCH assign.immediateassignmentCM servicerequestestablishindicationSucc. Seiz. Orig.Succ. Seiz. Term.SDCCH call re est.SDCCH emerg. callSucc. SMS est.Unsucc. SMS est.SDCCH loc. updateCM servicerequestUANOKIA TELECOMMUNICATIONSchannelrequestMSBTSBSCMSCVLRchannelrequiredSDCCH seiz att.SDCCH busy att.Ghost CCCH Res.channelactivationchannelact. ackn.immediateassignmentSDCCH assign.immediateassignmentCM servicerequestestablishindicationSucc. Seiz. Orig.Succ. Seiz. Term.SDCCH call re est.SDCCH emerg. callSucc. SMS est.Unsucc. SMS est.SDCCH loc. updateCM servicerequestUA timer 3101 stopped in the mobileNOKIA TELECOMMUNICATIONSchannelrequestMSBTSBSCMSCVLRchannelrequiredSDCCH seiz att.SDCCH busy att.Ghost CCCH Res.channelactivationchannelact. ackn.immediateassignmentSDCCH assign.immediateassignmentCM servicerequestestablishindicationSucc. Seiz. Orig.Succ. Seiz. Term.SDCCH call re est.SDCCH emerg. callSucc. SMS est.Unsucc. SMS est.SDCCH loc. updateCM servicerequestUA processaccess requestNOKIA TELECOMMUNICATIONSchannelrequestMSBTSBSCMSCVLRchannelrequiredSDCCH seiz att.SDCCH busy att.Ghost CCCH Res.channelactivationchannelact. ackn.immediateassignmentSDCCH assign.immediateassignmentCM servicerequestestablishindicationSucc. Seiz. Orig.Succ. Seiz. Term.SDCCH call re est.SDCCH emerg. callSucc. SMS est.Unsucc. SMS est.SDCCH loc. updateCM servicerequestUA processaccess requestCYPHERING &ENCRYPTION PARTNOKIA TELECOMMUNICATIONSchannelrequestMSBTSBSCMSCVLRchannelrequiredSDCCH seiz att.SDCCH busy att.Ghost CCCH Res.channelactivationchannelact. ackn.immediateassignmentSDCCH assign.immediateassignmentCM servicerequestestablishindicationSucc. Seiz. Orig.Succ. Seiz. Term.SDCCH call re est.SDCCH emerg. callSucc. SMS est.Unsucc. SMS est.SDCCH loc. updateCM servicerequestUA processaccess requestauthenticate requestNOKIA TELECOMMUNICATIONSchannelrequestMSBTSBSCMSCVLRchannelrequiredSDCCH seiz att.SDCCH busy att.Ghost CCCH Res.channelactivationchannelact. ackn.immediateassignmentSDCCH assign.immediateassignmentCM servicerequestestablishindicationSucc. Seiz. Orig.Succ. Seiz. Term.SDCCH call re est.SDCCH emerg. callSucc. SMS est.Unsucc. SMS est.SDCCH loc. updateCM servicerequestUA processaccess requestauthenticate requestauthentication requestNOKIA TELECOMMUNICATIONSchannelrequestMSBTSBSCMSCVLRchannelrequiredSDCCH seiz att.SDCCH busy att.Ghost CCCH Res.channelactivationchannelact. ackn.immediateassignmentSDCCH assign.immediateassignmentCM servicerequestestablishindicationSucc. Seiz. Orig.Succ. Seiz. Term.SDCCH call re est.SDCCH emerg. callSucc. SMS est.Unsucc. SMS est.SDCCH loc. updateCM servicerequestUA processaccess requestauthenticate requestauthentication requestauthentication requestNOKIA TELECOMMUNICATIONSchannelrequestMSBTSBSCMSCVLRchannelrequiredSDCCH seiz att.SDCCH busy att.Ghost CCCH Res.channelactivationchannelact. ackn.immediateassignmentSDCCH assign.immediateassignmentCM servicerequestestablishindicationSucc. Seiz. Orig.Succ. Seiz. Term.SDCCH call re est.SDCCH emerg. callSucc. SMS est.Unsucc. SMS est.SDCCH loc. updateCM servicerequestUA processaccess requestauthenticate requestauthentication requestauthentication requestA3SRESRANDKi (first 8 bits)NOKIA TELECOMMUNICATIONSchannelrequestMSBTSBSCMSCVLRchannelrequiredSDCCH seiz att.SDCCH busy att.Ghost CCCH Res.channelactivationchannelact. ackn.immediateassignmentSDCCH assign.immediateassignmentCM servicerequestestablishindicationSucc. Seiz. Orig.Succ. Seiz. Term.SDCCH call re est.SDCCH emerg. callSucc. SMS est.Unsucc. SMS est.SDCCH loc. updateCM servicerequestUA processaccess requestauthenticate requestauthentication requestauthentication requestauthentication responseNOKIA TELECOMMUNICATIONSchannelrequestMSBTSBSCMSCVLRchannelrequiredSDCCH seiz att.SDCCH busy att.Ghost CCCH Res.channelactivationchannelact. ackn.immediateassignmentSDCCH assign.immediateassignmentCM servicerequestestablishindicationSucc. Seiz. Orig.Succ. Seiz. Term.SDCCH call re est.SDCCH emerg. callSucc. SMS est.Unsucc. SMS est.SDCCH loc. updateCM servicerequestUA processaccess requestauthenticate requestauthentication requestauthentication requestauthentication responseauthentication responseNOKIA TELECOMMUNICATIONSchannelrequestMSBTSBSCMSCVLRchannelrequiredSDCCH seiz att.SDCCH busy att.Ghost CCCH Res.channelactivationchannelact. ackn.immediateassignmentSDCCH assign.immediateassignmentCM servicerequestestablishindicationSucc. Seiz. Orig.Succ. Seiz. Term.SDCCH call re est.SDCCH emerg. callSucc. SMS est.Unsucc. SMS est.SDCCH loc. updateCM servicerequestUA processaccess requestauthenticate requestauthentication requestauthentication requestauthentication responseauthentication responseauthentication responseNOKIA TELECOMMUNICATIONSchannelrequestMSBTSBSCMSCVLRchannelrequiredSDCCH seiz att.SDCCH busy att.Ghost CCCH Res.channelactivationchannelact. ackn.immediateassignmentSDCCH assign.immediateassignmentCM servicerequestestablishindicationSucc. Seiz. Orig.Succ. Seiz. Term.SDCCH call re est.SDCCH emerg. callSucc. SMS est.Unsucc. SMS est.SDCCH loc. updateCM servicerequestUA processaccess requestauthenticate requestauthentication requestauthentication requestauthentication responseauthentication responseauthentication response set ciphering modeNOKIA TELECOMMUNICATIONSchannelrequestMSBTSBSCMSCVLRchannelrequiredSDCCH seiz att.SDCCH busy att.Ghost CCCH Res.channelactivationchannelact. ackn.immediateassignmentSDCCH assign.immediateassignmentCM servicerequestestablishindicationSucc. Seiz. Orig.Succ. Seiz. Term.SDCCH call re est.SDCCH emerg. callSucc. SMS est.Unsucc. SMS est.SDCCH loc. updateCM servicerequestUA processaccess requestauthenticate requestauthentication requestauthentication requestauthentication responseauthentication responseauthentication response set ciphering modeciphering mode commandNOKIA TELECOMMUNICATIONSchannelrequestMSBTSBSCMSCVLRchannelrequiredSDCCH seiz att.SDCCH busy att.Ghost CCCH Res.channelactivationchannelact. ackn.immediateassignmentSDCCH assign.immediateassignmentCM servicerequestestablishindicationSucc. Seiz. Orig.Succ. Seiz. Term.SDCCH call re est.SDCCH emerg. callSucc. SMS est.Unsucc. SMS est.SDCCH loc. updateCM servicerequestUA processaccess requestauthenticate requestauthentication requestauthentication requestauthentication responseauthentication responseauthentication response set ciphering modeciphering mode commandencryption commandNOKIA TELECOMMUNICATIONSchannelrequestMSBTSBSCMSCVLRchannelrequiredSDCCH seiz att.SDCCH busy att.Ghost CCCH Res.channelactivationchannelact. ackn.immediateassignmentSDCCH assign.immediateassignmentCM servicerequestestablishindicationSucc. Seiz. Orig.Succ. Seiz. Term.SDCCH call re est.SDCCH emerg. callSucc. SMS est.Unsucc. SMS est.SDCCH loc. updateCM servicerequestUA processaccess requestauthenticate requestauthentication requestauthentication requestauthentication responseauthentication responseauthentication response set ciphering modeciphering mode commandencryption commandciphering mode commandNOKIA TELECOMMUNICATIONSchannelrequestMSBTSBSCMSCVLRchannelrequiredSDCCH seiz att.SDCCH busy att.Ghost CCCH Res.channelactivationchannelact. ackn.immediateassignmentSDCCH assign.immediateassignmentCM servicerequestestablishindicationSucc. Seiz. Orig.Succ. Seiz. Term.SDCCH call re est.SDCCH emerg. callSucc. SMS est.Unsucc. SMS est.SDCCH loc. updateCM servicerequestUA processaccess requestauthenticate requestauthentication requestauthentication requestauthentication responseauthentication responseauthentication response set ciphering modeciphering mode commandencryption commandciphering mode commandA8ciphering key (Kc)RANDKiNOKIA TELECOMMUNICATIONSchannelrequestMSBTSBSCMSCVLRchannelrequiredSDCCH seiz att.SDCCH busy att.Ghost CCCH Res.channelactivationchannelact. ackn.immediateassignmentSDCCH assign.immediateassignmentCM servicerequestestablishindicationSucc. Seiz. Orig.Succ. Seiz. Term.SDCCH call re est.SDCCH emerg. callSucc. SMS est.Unsucc. SMS est.SDCCH loc. updateCM servicerequestUA processaccess requestauthenticate requestauthentication requestauthentication requestauthentication responseauthentication responseauthentication response set ciphering modeciphering mode commandencryption commandciphering mode commandciphering mode completeNOKIA TELECOMMUNICATIONSchannelrequestMSBTSBSCMSCVLRchannelrequiredSDCCH seiz att.SDCCH busy att.Ghost CCCH Res.channelactivationchannelact. ackn.immediateassignmentSDCCH assign.immediateassignmentCM servicerequestestablishindicationSucc. Seiz. Orig.Succ. Seiz. Term.SDCCH call re est.SDCCH emerg. callSucc. SMS est.Unsucc. SMS est.SDCCH loc. updateCM servicerequestUA processaccess requestauthenticate requestauthentication requestauthentication requestauthentication responseauthentication responseauthentication response set ciphering modeciphering mode commandencryption commandciphering mode commandciphering mode completeciphering mode completeNOKIA TELECOMMUNICATIONSchannelrequestMSBTSBSCMSCVLRchannelrequiredSDCCH seiz att.SDCCH busy att.Ghost CCCH Res.channelactivationchannelact. ackn.immediateassignmentSDCCH assign.immediateassignmentCM servicerequestestablishindicationSucc. Seiz. Orig.Succ. Seiz. Term.SDCCH call re est.SDCCH emerg. callSucc. SMS est.Unsucc. SMS est.SDCCH loc. updateCM servicerequestUA processaccess requestauthenticate requestauthentication requestauthentication requestauthentication responseauthentication responseauthentication response set ciphering modeciphering mode commandencryption commandciphering mode commandciphering mode completeciphering mode completeaccess request acceptedNOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLR forward new TMSINOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLR forward new TMSITMSI realloc.command combintation of new TMSI and LAI combintation of IMSI and LAINOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLR forward new TMSITMSI realloc.commandTMSI reallocation com.NOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLR forward new TMSITMSI realloc.commandTMSI reallocation com.TMSI reallocation completeNOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLR forward new TMSITMSI realloc.commandTMSI reallocation com.TMSI reallocation completeTMSI realloc.completeNOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLR forward new TMSITMSI realloc.commandTMSI reallocation com.TMSI reallocation completeTMSI realloc.completeTMSI ackn.NOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLR forward new TMSITMSI realloc.commandTMSI reallocation com.TMSI reallocation completeTMSI realloc.completeTMSI ackn.setup (SDCCH)NOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLR forward new TMSITMSI realloc.commandTMSI reallocation com.TMSI reallocation completeTMSI realloc.completeTMSI ackn.setup (SDCCH) number of the called subscriber type of call (speech/data)NOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLR forward new TMSITMSI realloc.commandTMSI reallocation com.TMSI reallocation completeTMSI realloc.completeTMSI ackn.setup (SDCCH)setupNOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLR forward new TMSITMSI realloc.commandTMSI reallocation com.TMSI reallocation completeTMSI realloc.completeTMSI ackn.setup (SDCCH)setupsend info for outg. callNOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLR forward new TMSITMSI realloc.commandTMSI reallocation com.TMSI reallocation completeTMSI realloc.completeTMSI ackn.setup (SDCCH)setupsend info for outg. callcompletecallNOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLR forward new TMSITMSI realloc.commandTMSI reallocation com.TMSI reallocation completeTMSI realloc.completeTMSI ackn.setup (SDCCH)setupsend info for outg. callcompletecallcallproceedingNOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLR forward new TMSITMSI realloc.commandTMSI reallocation com.TMSI reallocation completeTMSI realloc.completeTMSI ackn.setup (SDCCH)setupsend info for outg. callcompletecallcallproceedingcall proceedingNOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLR forward new TMSITMSI realloc.commandTMSI reallocation com.TMSI reallocation completeTMSI realloc.completeTMSI ackn.setup (SDCCH)setupsend info for outg. callcompletecallcallproceedingcall proceedingassignmentrequestNOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLR forward new TMSITMSI realloc.commandTMSI reallocation com.TMSI reallocation completeTMSI realloc.completeTMSI ackn.setup (SDCCH)setupsend info for outg. callcompletecallcallproceedingcall proceedingassignmentrequest command from MSC to BSC to activate channel in the A-interfaceNOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLR forward new TMSITMSI realloc.commandTMSI reallocation com.TMSI reallocation completeTMSI realloc.completeTMSI ackn.setup (SDCCH)setupsend info for outg. callcompletecallcallproceedingcall proceedingassignmentrequestphys. contextrequestNOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLR forward new TMSITMSI realloc.commandTMSI reallocation com.TMSI reallocation completeTMSI realloc.completeTMSI ackn.setup (SDCCH)setupsend info for outg. callcompletecallcallproceedingcall proceedingassignmentrequestphys. contextrequestphys. contextconfirmNOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLR forward new TMSITMSI realloc.commandTMSI reallocation com.TMSI reallocation completeTMSI realloc.completeTMSI ackn.setup (SDCCH)setupsend info for outg. callcompletecallcallproceedingcall proceedingassignmentrequestphys. contextrequestphys. contextconfirm BSC starts searching for a TCH channel - no channel available - queing - channel available - reservation & activationNOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLR forward new TMSITMSI realloc.commandTMSI reallocation com.TMSI reallocation completeTMSI realloc.completeTMSI ackn.setup (SDCCH)setupsend info for outg. callcompletecallcallproceedingcall proceedingassignmentrequestphys. contextrequestphys. contextconfirmTCH requestTCH norm seizTCH req. rej. lack + A_BSC BSC starts searching for a TCH channel - no channel available - queing - channel available - reservation & activationNOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLR forward new TMSITMSI realloc.commandTMSI reallocation com.TMSI reallocation completeTMSI realloc.completeTMSI ackn.setup (SDCCH)setupsend info for outg. callcompletecallcallproceedingcall proceedingassignmentrequestphys. contextrequestphys. contextconfirmTCH requestTCH norm seizTCH req. rej. lack + A_BSCchannelactivationNOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLR forward new TMSITMSI realloc.commandTMSI reallocation com.TMSI reallocation completeTMSI realloc.completeTMSI ackn.setup (SDCCH)setupsend info for outg. callcompletecallcallproceedingcall proceedingassignmentrequestphys. contextrequestphys. contextconfirmTCH requestTCH norm seizTCH req. rej. lack + A_BSCchannelactivationchannel act.acknowledgeNOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLR forward new TMSITMSI realloc.commandTMSI reallocation com.TMSI reallocation completeTMSI realloc.completeTMSI ackn.setup (SDCCH)setupsend info for outg. callcompletecallcallproceedingcall proceedingassignmentrequestphys. contextrequestphys. contextconfirmTCH requestTCH norm seizTCH req. rej. lack + A_BSCchannelactivationchannel act.acknowledgeassignment commandNOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLR forward new TMSITMSI realloc.commandTMSI reallocation com.TMSI reallocation completeTMSI realloc.completeTMSI ackn.setup (SDCCH)setupsend info for outg. callcompletecallcallproceedingcall proceedingassignmentrequestphys. contextrequestphys. contextconfirmTCH requestTCH norm seizTCH req. rej. lack + A_BSCchannelactivationchannel act.acknowledgeassignment command information included channel descriptiontimeslotsubchanneltraining sequence codeRF channel number channel mode (speech/data) power level timer 3107 started mobile changes from SDCCH to TCHNOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLR forward new TMSITMSI realloc.commandTMSI reallocation com.TMSI reallocation completeTMSI realloc.completeTMSI ackn.setup (SDCCH)setupsend info for outg. callcompletecallcallproceedingcall proceedingassignmentrequestphys. contextrequestphys. contextconfirmTCH requestTCH norm seizTCH req. rej. lack + A_BSCchannelactivationchannel act.acknowledgeassignment commandtraffic channel seizedNOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLR forward new TMSITMSI realloc.commandTMSI reallocation com.TMSI reallocation completeTMSI realloc.completeTMSI ackn.setup (SDCCH)setupsend info for outg. callcompletecallcallproceedingcall proceedingassignmentrequestphys. contextrequestphys. contextconfirmTCH requestTCH norm seizTCH req. rej. lack + A_BSCchannelactivationchannel act.acknowledgeassignment commandSABM(FACCH)NOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLR forward new TMSITMSI realloc.commandTMSI reallocation com.TMSI reallocation completeTMSI realloc.completeTMSI ackn.setup (SDCCH)setupsend info for outg. callcompletecallcallproceedingcall proceedingassignmentrequestphys. contextrequestphys. contextconfirmTCH requestTCH norm seizTCH req. rej. lack + A_BSCchannelactivationchannel act.acknowledgeassignment commandSABM(FACCH)establishindicationNOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLR forward new TMSITMSI realloc.commandTMSI reallocation com.TMSI reallocation completeTMSI realloc.completeTMSI ackn.setup (SDCCH)setupsend info for outg. callcompletecallcallproceedingcall proceedingassignmentrequestphys. contextrequestphys. contextconfirmTCH requestTCH norm seizTCH req. rej. lack + A_BSCchannelactivationchannel act.acknowledgeassignment commandSABM(FACCH)establishindication synchronisation with transcoder starts BSC connects A-interface and Abis-interface, speech channel switched throughNOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLR forward new TMSITMSI realloc.commandTMSI reallocation com.TMSI reallocation completeTMSI realloc.completeTMSI ackn.setup (SDCCH)setupsend info for outg. callcompletecallcallproceedingcall proceedingassignmentrequestphys. contextrequestphys. contextconfirmTCH requestTCH norm seizTCH req. rej. lack + A_BSCchannelactivationchannel act.acknowledgeassignment commandSABM(FACCH)establishindicationUA(FACCH)NOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLR forward new TMSITMSI realloc.commandTMSI reallocation com.TMSI reallocation completeTMSI realloc.completeTMSI ackn.setup (SDCCH)setupsend info for outg. callcompletecallcallproceedingcall proceedingassignmentrequestphys. contextrequestphys. contextconfirmTCH requestTCH norm seizTCH req. rej. lack + A_BSCchannelactivationchannel act.acknowledgeassignment commandSABM(FACCH)establishindicationUA(FACCH)assignment completeNOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLR forward new TMSITMSI realloc.commandTMSI reallocation com.TMSI reallocation completeTMSI realloc.completeTMSI ackn.setup (SDCCH)setupsend info for outg. callcompletecallcallproceedingcall proceedingassignmentrequestphys. contextrequestphys. contextconfirmTCH requestTCH norm seizTCH req. rej. lack + A_BSCchannelactivationchannel act.acknowledgeassignment commandSABM(FACCH)establishindicationUA(FACCH)assignment complete timer 3107 stoppedNOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLR forward new TMSITMSI realloc.commandTMSI reallocation com.TMSI reallocation completeTMSI realloc.completeTMSI ackn.setup (SDCCH)setupsend info for outg. callcompletecallcallproceedingcall proceedingassignmentrequestphys. contextrequestphys. contextconfirmTCH requestTCH norm seizTCH req. rej. lack + A_BSCchannelactivationchannel act.acknowledgeassignment commandSABM(FACCH)establishindicationUA(FACCH)assignment completeassignmentcompleteA_MSCNOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLR forward new TMSITMSI realloc.commandTMSI reallocation com.TMSI reallocation completeTMSI realloc.completeTMSI ackn.setup (SDCCH)setupsend info for outg. callcompletecallcallproceedingcall proceedingassignmentrequestphys. contextrequestphys. contextconfirmTCH requestTCH norm seizTCH req. rej. lack + A_BSCchannelactivationchannel act.acknowledgeassignment commandSABM(FACCH)establishindicationUA(FACCH)assignment completeassignmentcompleteA_MSCchannelreleaseNOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLR forward new TMSITMSI realloc.commandTMSI reallocation com.TMSI reallocation completeTMSI realloc.completeTMSI ackn.setup (SDCCH)setupsend info for outg. callcompletecallcallproceedingcall proceedingassignmentrequestphys. contextrequestphys. contextconfirmTCH requestTCH norm seizTCH req. rej. lack + A_BSCchannelactivationchannel act.acknowledgeassignment commandSABM(FACCH)establishindicationUA(FACCH)assignment completeassignmentcompleteA_MSCchannelreleasechannelrelease ackn.NOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLR forward new TMSITMSI realloc.commandTMSI reallocation com.TMSI reallocation completeTMSI realloc.completeTMSI ackn.setup (SDCCH)setupsend info for outg. callcompletecallcallproceedingcall proceedingassignmentrequestphys. contextrequestphys. contextconfirmTCH requestTCH norm seizTCH req. rej. lack + A_BSCchannelactivationchannel act.acknowledgeassignment commandSABM(FACCH)establishindicationUA(FACCH)assignment completeassignmentcompleteA_MSCchannelreleasechannelrelease ackn.alertingNOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLR forward new TMSITMSI realloc.commandTMSI reallocation com.TMSI reallocation completeTMSI realloc.completeTMSI ackn.setup (SDCCH)setupsend info for outg. callcompletecallcallproceedingcall proceedingassignmentrequestphys. contextrequestphys. contextconfirmTCH requestTCH norm seizTCH req. rej. lack + A_BSCchannelactivationchannel act.acknowledgeassignment commandSABM(FACCH)establishindicationUA(FACCH)assignment completeassignmentcompleteA_MSCchannelreleasechannelrelease ackn.alertingalertingNOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLR forward new TMSITMSI realloc.commandTMSI reallocation com.TMSI reallocation completeTMSI realloc.completeTMSI ackn.setup (SDCCH)setupsend info for outg. callcompletecallcallproceedingcall proceedingassignmentrequestphys. contextrequestphys. contextconfirmTCH requestTCH norm seizTCH req. rej. lack + A_BSCchannelactivationchannel act.acknowledgeassignment commandSABM(FACCH)establishindicationUA(FACCH)assignment completeassignmentcompleteA_MSCchannelreleasechannelrelease ackn.alertingalertingconnectNOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLR forward new TMSITMSI realloc.commandTMSI reallocation com.TMSI reallocation completeTMSI realloc.completeTMSI ackn.setup (SDCCH)setupsend info for outg. callcompletecallcallproceedingcall proceedingassignmentrequestphys. contextrequestphys. contextconfirmTCH requestTCH norm seizTCH req. rej. lack + A_BSCchannelactivationchannel act.acknowledgeassignment commandSABM(FACCH)establishindicationUA(FACCH)assignment completeassignmentcompleteA_MSCchannelreleasechannelrelease ackn.alertingalertingconnectconnect (FACCH)NOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLR forward new TMSITMSI realloc.commandTMSI reallocation com.TMSI reallocation completeTMSI realloc.completeTMSI ackn.setup (SDCCH)setupsend info for outg. callcompletecallcallproceedingcall proceedingassignmentrequestphys. contextrequestphys. contextconfirmTCH requestTCH norm seizTCH req. rej. lack + A_BSCchannelactivationchannel act.acknowledgeassignment commandSABM(FACCH)establishindicationUA(FACCH)assignment completeassignmentcompleteA_MSCchannelreleasechannelrelease ackn.alertingalertingconnectconnect (FACCH)connect ackn. (FACCH)NOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLR forward new TMSITMSI realloc.commandTMSI reallocation com.TMSI reallocation completeTMSI realloc.completeTMSI ackn.setup (SDCCH)setupsend info for outg. callcompletecallcallproceedingcall proceedingassignmentrequestphys. contextrequestphys. contextconfirmTCH requestTCH norm seizTCH req. rej. lack + A_BSCchannelactivationchannel act.acknowledgeassignment commandSABM(FACCH)establishindicationUA(FACCH)assignment completeassignmentcompleteA_MSCchannelreleasechannelrelease ackn.alertingalertingconnectconnect (FACCH)connect ackn. (FACCH)connect ackn.NOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLRmeasurementreport (SACCH)NOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLRmeasurementreport (SACCH)measurementreport/resultNOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLRmeasurementreport (SACCH)measurementreport/resultrelease by mobile subscriberNOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLRmeasurementreport (SACCH)measurementreport/resultdisconnect (FACCH)NOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLRmeasurementreport (SACCH)measurementreport/resultdisconnect (FACCH)disconnectNOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLRmeasurementreport (SACCH)measurementreport/resultdisconnect (FACCH)disconnectreleaseNOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLRmeasurementreport (SACCH)measurementreport/resultdisconnect (FACCH)release (FACCH)disconnectreleaseNOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLRmeasurementreport (SACCH)measurementreport/resultdisconnect (FACCH)release (FACCH)release complete (FACCH)disconnectreleaseNOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLRmeasurementreport (SACCH)measurementreport/resultdisconnect (FACCH)release (FACCH)release complete (FACCH)releasecompleteB_MSCdisconnectreleaseNOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLRmeasurementreport (SACCH)measurementreport/resultdisconnect (FACCH)release (FACCH)release complete (FACCH)releasecompleteB_MSCdisconnectreleaseclearcommand BSC releases A-interface speech circuitNOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLRmeasurementreport (SACCH)measurementreport/resultdisconnect (FACCH)release (FACCH)release complete (FACCH)releasecompleteB_MSCdisconnectreleaseclearcommandchannel release(FACCH)NOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLRmeasurementreport (SACCH)measurementreport/resultdisconnect (FACCH)release (FACCH)release complete (FACCH)releasecompleteB_MSCdisconnectreleaseclearcommandchannel release(FACCH)deactivateSACCHNOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLRmeasurementreport (SACCH)measurementreport/resultdisconnect (FACCH)release (FACCH)release complete (FACCH)releasecompleteB_MSCdisconnectreleaseclearcommandchannel release(FACCH)deactivateSACCHDISC(FACCH)NOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLRmeasurementreport (SACCH)measurementreport/resultdisconnect (FACCH)release (FACCH)release complete (FACCH)releasecompleteB_MSCdisconnectreleaseclearcommandchannel release(FACCH)deactivateSACCHDISC(FACCH)UA(FACCH)NOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLRmeasurementreport (SACCH)measurementreport/resultdisconnect (FACCH)release (FACCH)release complete (FACCH)releasecompleteB_MSCMS starts listening toBCCH againdisconnectreleaseclearcommandchannel release(FACCH)deactivateSACCHDISC(FACCH)UA(FACCH)NOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLRmeasurementreport (SACCH)measurementreport/resultdisconnect (FACCH)disconnectreleaserelease (FACCH)release complete (FACCH)releasecompleteB_MSCclearcommandchannel release(FACCH)deactivateSACCHDISC(FACCH)UA(FACCH)releaseindicationNOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLRmeasurementreport (SACCH)measurementreport/resultdisconnect (FACCH)disconnectreleaserelease (FACCH)release complete (FACCH)releasecompleteB_MSCclearcommandchannel release(FACCH)deactivateSACCHDISC(FACCH)UA(FACCH)releaseindicationRF channelreleaseNOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLRmeasurementreport (SACCH)measurementreport/resultdisconnect (FACCH)disconnectreleaserelease (FACCH)release complete (FACCH)releasecompleteB_MSCclearcommandchannel release(FACCH)deactivateSACCHDISC(FACCH)UA(FACCH)releaseindicationRF channelreleaseRF channelrelease ackn.B_BSCNOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLRmeasurementreport (SACCH)measurementreport/resultdisconnect (FACCH)disconnectreleaserelease (FACCH)release complete (FACCH)releasecompleteB_MSCclearcommandchannel release(FACCH)deactivateSACCHDISC(FACCH)UA(FACCH)releaseindicationRF channelreleaseRF channelrelease ackn.B_BSCclearcompleteNOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLRmeasurementreport (SACCH)measurementreport/resultdisconnect (FACCH)disconnectreleaserelease (FACCH)release complete (FACCH)releasecompleteB_MSCclearcommandchannel release(FACCH)deactivateSACCHDISC(FACCH)UA(FACCH)releaseindicationRF channelreleaseRF channelrelease ackn.B_BSCclearcompleteSCCPreleasedNOKIA TELECOMMUNICATIONSMSBTSBSCMSCVLRmeasurementreport (SACCH)measurementreport/resultdisconnect (FACCH)disconnectreleaserelease (FACCH)release complete (FACCH)releasecompleteB_MSCclearcommandchannel release(FACCH)deactivateSACCHDISC(FACCH)UA(FACCH)releaseindicationRF channelreleaseRF channelrelease ackn.B_BSCclearcompleteSCCPreleasedSCCPreleased ackn.