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1、CourseDescription1.IntroductiontotheCourseTheGSMcommunicationflowincludesthecallbasicflowandsignalingbasicflow.Thecallflowincludesthemobileoriginatedflow,mobileterminatedflow,andtandemcallflow.Thesignalingbasicflowincludestheauthenticationflow,locationregistrationflow,callre-setupflow,intra-BSChan
2、doverflow,inter-BSChandoverflow,inter-MSChandoverflow,mobileoriginatedSMflow,mobileterminatedSMflow,anddirectedretryflow.Theseflowsdescribeactivitiesofmobilesubscribersfromtheangleofthesystem,anddescribetherelationofGSMcomponentsinthecallflowandsignalingflow.Mobilityfeaturesaremainlydescribed.2.Ob
3、jectivesThiscoursedescribesthecooperativeoperationsoftheGSMsystem,includingcall,locationupdate,handover,andshortmessage.Thedescriptionoftheflowfocusesonthemobilityfeatures.Specificsignalingdetailsarenotdescribed.Toobtainmoredetailedcontents,seeGSMspecificationsoftheETSI.Throughthelearningofthiscou
4、rse,masterthefollowing:SignalingprocedureoflocationregistrationbyamobilesubscriberSignalingprocedureofaMS-originatedcallSignalingprocedureofaMS-terminatedcallSignalingprocedureofMSCtandemingcallIntra-BSChandoversignalingprocedureInter-BSChandoversignalingprocedureInter-MSChandoversignalingprocedur
5、eCallre-setupsignalingprocedureAfterthelearningofthesesignalingflows,youcanlearnmoreabouttheGSMsystemprinciplesandbetterunderstandfunctionsofentitiessuchasMS,BTS,BSC,MSC,VLR,HLR,andSC.3.ReferencesGSMspecificationsofETSIare0408and0808.LocationupdateflowMSswitch-offflowMS-originatedflowMS-terminated
6、flowIntra-cellHandoverIntra-BSCInter-cellHandoverIntra-MSCInter-BSCHandoverPoint-to-pointShortMessageFlow(withencryption)—SMTransmittinginIdleStatusPoint-to-pointShortMessageFlow(withencryption)—SMReceivinginIdleStatusPoint-to-pointShortMessageFlow(withencryption)—SMTransmittinginConversationPoint
7、-to-pointShortMessageFlow(withencryption)—SMReceivinginConversation
