Call Setup Analysis by Actix

8/13/2019 Call Setup Analysis by Actix

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Grant Chivandire -Radio Planning andOptimisation Specialist

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RADIO PLANNING AND OPTIMISATIONCall Setup Analysis A Drive Test Perspective(Presentation/Discussion)27 July 2009ByGrant Chivandire


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Objectives

This presentation will cover the following:

.SystemInfoMessages

.TypesofMOC

.SignalingFlowforMOC

.CallSetupFailures&possiblecauses


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System Info Messages

.ContainnetworkparameterssenttoMSthroughairinterface

.Theseparametersare:

.NetworkIdentityparameters

.Cellselectionparameters

.Systemcontrolparameters

.Networkfunctionparameters


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System Information Messages IdleMode

ThesearesenttotheMSonBCCH

.SYSINFO1

.ContainsRACHcontrolinformationandcellchanneldescription

.Theseincludethefollowing:Cellfrequencyallocation(CAlist)Maximumretransmissiontimes(Maxretrans)Extendedtransmissiontimeslots(Tx_interger)CellBaraccess(CBA)Commonaccesscontrollevel(AC)Callre-establishpermitted(RE)Emergencycallspermitted(EC)


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.SYSINFO1MessagefromACTIX


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.SYSINFO2

.Containsthefollowing:NeighbourcelldescriptionNCCpermittedRACHcontrolparameters(sameasinSYSINFOTYPE1)



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.SYSINFO3

.Containsthefollowing:LocationAreaIdentity(MCC,MNC,LAC,CI)Controlchanneldescription(reservedAccessGrantBlocks,CCCHConfiguration,IMSIAttach/Detachallowed,PagingMultiframes,T3212)CellOption(Powercontrolindication,DTX,RLINKT)CellSelection(MS_TXPWR,ACCMIN,ACS,NECI)RACHcontrolparameters(sameasinSYSINFOTYPE1)


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.SYSINFO4

.Containsthefollowing:CellSelectionParametersRACHControlParametersCBCHChanneldescription.SYSINFO4MessagefromACTIX


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System Information Messages DedicatedMode

ThesearesenttotheMSonSACCH

.SYSINFO5

.ContainsneighbourcellBCCHfrequencies(Phase1Mobiles)

.SYSINFO5Bis

.ContainsneighbourcellBCCHfrequencieswhichcouldnotfitinthelimitedspaceofTYPE5andbelongtothesamebandasservingBCCH.SYSINFO5TER.ContainsneighbourcellBCCHfrequencieswhosebandisdifferentfromservingBCCH(DualBandMobiles).SYSINFO5TERMessagefromACTIX


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System Information Messages DedicatedMode

.SYSINFO6

.Containsthefollowing:CellIdentityLAICelloptionNCCPermitted.SYSINFO6MessagefromACTIX


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Mobile OriginatingCall -MOC

Types

.Early Assignment

.ThenetworkassignstheTCH+FACCHaftersendingCCCallProceedingandcompletescallsetupontheFACCH

.LateAssignment

.ThenetworkdoesnotassigntheTCH+FACCHuntilafteralertinghasstarted

.VeryEarlyAssignment

.ThenetworkmakesanimmediateassignmenttotheTCH+FACCHintheinitialRRestablishmentandperformstheentiretransactionontheFACCH.TheSDCCHisnotused


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Signaling Flow of MOC


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Signaling Flow MOC (Um Interface)

.ChannelRequest(uplink)

.MSsendsChannelRequestmessageontheRACH

.Messagecontainsthefollowing:CausevalueMOCRandomreferencenumber.ChannelRequestMessagefromACTIX


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Signaling Flow MOC (Um Interface) (Cont)

.ImmediateAssignment(downlink)

.BSCsendsimmediateassignmentthroughtheBTStotheMSonAGCH

.Messagecontainsthefollowing:DetailsofthesignalingchannelbeingassignedRequestreferencedetails.ImmediateAssignmentMessagefromACTIX


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.Setup(uplink)

.MSsendssetupmessagetotheMSConSDCCH

.Messagecontainsthefollowing:BearercapabilitiesB-numberdetails.SetupMessagefromACTIX

.NB:AuthenticationandCipheringhavebeenomitted


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.CallProceeding(downlink)

.MSCsendcallproceedingmessagetoMSonSDCCHinformingitthatthecallsetupisinprogress

.Messagecontainsthefollowing:TransactionIDwhichmaybeco-relatedtotherelevantSETUPmessage.CallProceedingMessagefromACTIX


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.AssignmentCommand(downlink)

.BSCsendsAssignmentCommandtoMSonSDCCH

.Messagecontainsthefollowing:DetailsofthetrafficchannelbeingassignedAmountofpowertobeusedbytheMS.AssignmentCommandMessagefromACTIX


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.AssignmentComplete(uplink)

.MSsendsAssignmentCompletemessagetoBSConFACCHafterithasswitchedtotheassignedTCH

.AssignmentCompleteMessagefromACTIX


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.Alerting(downlink)

.MSCsendsAlertingmessagetoMSonFACCH

.TheMSwillhearthering-back

.AlertingMessagefromACTIX


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.Connect(downlink)

.MSCsendsConnectmessagetoMSonFACCH

.Thishappensafterthecalledpartyhasansweredthecall

.CallingMSswitchesovertovoiceontheassignedTCH

.ConnectMessagefromACTIX


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.ConnectAcknowledgement(uplink)

.MSsendsaConnectAcknowledgementtoMSConFACCH

.Callhasbeensuccessfullysetup

.ConnectAcknowledgementMessagefromACTIX


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Call Setup Failure

.RACH Success


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Call Setup Failure

.Paging Success


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Call Setup Failure

.High SDCCH Congestion Rate


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Call Setup Failure

.High SDCCH Drop Rate


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Call Setup Failure

.High TCH Congestion Rate


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Call Setup Failure

.DisconnectCause

.DisconnectcausecodeLayer3messagecontainsthecausecodeanddescriptionforthedisconnectionGetmoreinformationfrom3GPPTS24.008document


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THANK YOU !


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Call Setup Analysis by Actix

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