gsm呼叫流程大全课件

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1、channelrequestMSBTSBSCMSCVLRchannelrequestMSBTSBSCMSCVLRestablishmentcauseanswerforpaging(MTC)emergencycallcallre-establishmentuserrequest(MOC,SMS,suppl.service)otherserives(loc.update,IMSIdetach)randomnumberchannelrequestMSBTSBSCMSCVLRchannelrequiredchannelreque

2、stMSBTSBSCMSCVLRchannelrequiredBSCstartssearchingforaSDCCHchannel-channelavailable->reservation-nochannelavailable->blockingchannelrequestMSBTSBSCMSCVLRchannelrequiredSDCCHseizatt.SDCCHbusyatt.GhostCCCHRes.BSCstartssearchingforaSDCCHchannel-channelavailable->reserv

3、ation-nochannelavailable->blockingchannelrequestMSBTSBSCMSCVLRchannelrequiredSDCCHseizatt.SDCCHbusyatt.GhostCCCHRes.channelactivationchannelrequestMSBTSBSCMSCVLRchannelrequiredSDCCHseizatt.SDCCHbusyatt.GhostCCCHRes.channelactivationchannelact.ackn.channelrequestMSBTS

4、BSCMSCVLRchannelrequiredSDCCHseizatt.SDCCHbusyatt.GhostCCCHRes.channelactivationchannelact.ackn.immediateassignmentchannelrequestMSBTSBSCMSCVLRchannelrequiredSDCCHseizatt.SDCCHbusyatt.GhostCCCHRes.channelactivationchannelact.ackn.immediateassignmentinformationincluded

5、pagemodetimingadvancechanneldescriptiontimeslotsubchanneltrainingsequencecodeRFchannelnumbertimer3101startedintheBSCchannelrequestMSBTSBSCMSCVLRchannelrequiredSDCCHseizatt.SDCCHbusyatt.GhostCCCHRes.channelactivationchannelact.ackn.immediateassignmentSDCCHassign

6、.informationincludedpagemodetimingadvancechanneldescriptiontimeslotsubchanneltrainingsequencecodeRFchannelnumbertimer3101startedintheBSCchannelrequestMSBTSBSCMSCVLRchannelrequiredSDCCHseizatt.SDCCHbusyatt.GhostCCCHRes.channelactivationchannelact.ackn.immediatea

7、ssignmentSDCCHassign.immediateassignmentchannelrequestMSBTSBSCMSCVLRchannelrequiredSDCCHseizatt.SDCCHbusyatt.GhostCCCHRes.channelactivationchannelact.ackn.immediateassignmentSDCCHassign.immediateassignmentESTABLISHMENTPARTchannelrequestMSBTSBSCMSCVLRchannelrequiredSDC

8、CHseizatt.SDCCHbusyatt.GhostCCCHRes.channelactivationchannelact.ackn.immediateassignmentSDCCHassign.immediateassignmentCMser