Transitions for IRATAdvantages of having URAParameters effecting Cell Selection (S-Criteria)Parameters effecting Cell Reselection (R-Criteria)Parameters effecting Handover to WCDMAParameters effecting IRATHO

Contents

Transitions for IRAT Cell ReselectionPS PDCHPS FACHPS DCHCS TCHCS DCHIdleIdleUMTSGSM/GPRSHandoverCell ReselectionCell ChangeStrategy for Connected ModeStrategy for idle Mode

Advantages of having URAFrequent LAC updates can be avoided in LAC BoundariesWHYIn URA_PCH Mode UE wont perform LAC/RAC UpdatePaging Load can be reduced .. WHYLocation of an UE is known up to URA level.Service setup time would be lowerWHYNo Admission check for RRC Setup

Parameters effecting Cell Selection (S-Criteria)Squal = Qqualmeas qQualMinSrxlev = Qrxlevmeas - qRxLevMin Pcompensation

Qqualmeas Ec/No CriteriaQrxlevmeas RSCP CriteriaParametersCriteria for a healthy 3G CellBoth Should Satisfy i.e. > 0Lets Compare with Criteria for a healthy 2G CellC1 = RLA - ACCMIN PcompensationSrxlev = Qrxlevmeas - qRxLevMin Pcompensation

Parameters effecting Cell Reselection (R-Criteria)UMTSGSM/GPRSWhen to start Measuring IRATWhen to Make IRAT Re-SelectionWhen to start Measuring WCDMA CellWhen to Make Re-Selection to WCDMACareful setting of Parameters to Optimize measurement initiation & Cell Reselections

Parameters effecting Cell Reselection (R-Criteria)UMTSGSM/GPRSWhen to start Measuring IRATWhen to Make IRAT Re-SelectionsRatSearchsHcsRatqQualMinqRxlevelMinqHyst1qOffset1sntreSelectionPARAMETERS EFFECTING IRAT Cell Reselection

Parameters effecting Cell Reselection (R-Criteria)UMTSGSM/GPRSFDDQMINFDDQOFFFDDQMINOFFFDDRSCPMINQSIPARAMETERS EFFECTING Cell Reselection to WCDMAWhen to start Measuring WCDMA CellWhen to Make Re-Selection to WCDMA

Parameters effecting Handover to WCDMAUMTSGSM/GPRSMRSLISHOLEVQSCPARAMETERS EFFECTING Handover to WCDMAWhen to start Measuring WCDMA CellWhen to Make Handover to WCDMA

Parameters effecting IRATHOUMTSGSM/GPRSWhen to start Measuring IRATWhen to Make IRATHOusedFreqThresh2dEcnousedFreqThresh2dRSCPusedFreqRelThresh2fEcnousedFreqRelThresh2fRSCPhysteresis2d/2timeToTrigger2dtimeToTrigger2fueTxPowerThreah6btimeTrigg6b2d service offset

utranRelThresh3aEcnohysteresis3a/2gsmThresh3atimeToTrigger3aPARAMETERS EFFECTING IRAT Cell Reselection

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