TLA2.1 LPUG 02.06 Volume 6 Mobility Approved Preliminary External

LTE/DCL/APP/031549 V02.06 / EN

TDD ENODEB LTE PARAMETERS USER GUIDE 27 APR 2011

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LTE PARAMETERS USER GUIDE

VOLUME 6 MOBILITY

TDD eNodeB LTE Parameters User Guide 02.06 / EN 27 Apr 2011 LTE/DCL/APP/031549 EXTERNAL Approved-Preliminary

Volume 6 : Mobility


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CONTENTS AND PARAMETER GUIDE

1 INTRODUCTION..............................................................................................................................10

1.1 OBJECT ...................................................................................................................................10

1.2 SCOPE OF THIS VOLUME ........................................................................................................10

1.3 LIST OF RELATED FEATURES ............................................................................................11

2 RELATED DOCUMENTS AND PREREQUISITES................ .........................................................12

2.1 LPUG VOLUMES ......................................................................................................................12

2.2 REFERENCE DOCUMENTS..........................................................................................................12

2.3 PREREQUISITES FOR READING THIS VOLUME ...............................................................13

3 OVERVIEW ......................................................................................................................................13

4 INTRA-RAT MOBILITY FOR LTE......................... ..........................................................................14

4.1 INTRA-FREQUENCY MOBILITY FOR LTE .....................................................................................14

4.1.1 RRC IDLE MODE MOBILITY ...........................................................................................14 4.1.1.1 INTER TRACKING AREA MOBILITY:.........................................................................15

LteCell:: trackingAreaCode................................................................................15 LteNeighboringCellRelation:: trackingAreaCode.............................................16

4.1.1.2 PLMN Selection & CELL RESERVATION and CELL RESTRICTION: .......................16 4.1.1.3 CELL RESELECTION ALGORITHM DESCRIPTION .................................................16 4.1.1.3.1 CELL SELECTION CRITERION......................................................................................16

CellSelectionReselectionConf:: qRxLevMin.....................................................18 CellSelectionReselectionConf:: qRxlevminoffset ............................................18 CellSelectionReselectionConf:: sIntraSearch ..................................................19 CellSelectionReselectionConf:: measurementBandwidth ..............................19

4.1.1.3.2 INTRA-FREQUENCY AND EQUAL PRIORITY INTER-FREQUENCY CELL RESELECTION CRITERIA .......................................................................................................................21

CellSelectionReselectionConf:: qHyst ..............................................................22 CellSelectionReselectionConf:: tReselectionEUTRAN....................................23 LteNeighboringCellRelation:: qOffsetCell ........................................................24 CellSelectionReselectionConf:: qRxLevMinIntraFreqNeighbour ...................25

4.1.1.3.3 UE SPEED MANAGEMENT ............................................................................................25 SpeedStateEvalBroadcastConf:: tEvaluation...................................................26 SpeedStateEvalBroadcastConf:: nCellChangeHigh ........................................27 SpeedStateEvalBroadcastConf:: nCellChangeMedium...................................28 SpeedStateEvalBroadcastConf:: tHystNormal.................................................28 SpeedStateEvalBroadcastConf:: qHystSfHigh.................................................29 LteSpeedConf:: tReselectionEutraSfHigh ........................................................30 SpeedStateEvalBroadcastConf:: qHystSfMedium ...........................................31 LteSpeedConf:: tReselectionEutraSfMedium...................................................32

4.1.1.3.3.1 ..........MIM MODEL 32 4.1.2 RRC connected MODE MOBILITY...................................................................................34

4.1.2.1 MOBILITY ACTIVATION..............................................................................................36 ActivationService:: isIntraFreqMobilityAllowe....... .........................................36

4.1.2.2 INTRA-FREQUENCY INTRA-eNB MOBILITY ............................................................37 4.1.2.2.1 Key Refresh or Re-keying...................................................................................................40

4.1.2.3 INTRA-FREQUENCY INTER-eNB X2 Handover .....................................................41


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ActivationService:: isDataForwardingAllowed.................................................45 RadioBearerConf:: dataForwardingForX2HoEnabled .....................................46 X2GtpConf:: endX2HoDataFwdTarget ..............................................................48

4.1.2.3.1 Failure Cases .......................................................................................................................48 4.1.2.3.2 FEATURE INTERACTIONS.............................................................................................50

4.1.2.4 INTRA-FREQUENCY Inter-eNB S1 Handover.........................................................51 4.1.2.4.1 Failure Cases .......................................................................................................................55 4.1.2.4.2 Feature Interactions.............................................................................................................56 4.1.2.4.3 S1 Handover Parameters .....................................................................................................57

ActivationService:: isS1HoAllowed...................................................................58 RadioBearerConf:: dataForwardingForS1HoEnabled .....................................58 X2Access:: directFwdPathAvailability ..............................................................59 S1HoTimersConf:: tS1RelocPrepForS1Handover...........................................60 S1HoTimersConf:: tS1RelocOverallForS1Handover ......................................61 S1HoTimersConf:: endS1HoDataFwdTarget ....................................................62

4.1.2.5 INTRA-FREQUENCY MEASUREMENT REPORTING SETTING..............................62 MeasurementIdentityConf:: measurementPurpose .........................................63 MeasurementIdentityConf:: measObjectId .......................................................64 MeasurementIdentityConf:: reportConfigId.....................................................64 ReportConfig:: reportConfigId..........................................................................64

4.1.2.5.1 Measurement setup upon transition to RRC-Connected state .............................................65 4.1.2.5.2 Measurement update upon completion of handover ...........................................................66

MeasObjectEUTRA:: dlEARFCN ........................................................................69 MeasObjectEUTRA:: measurementBandwidth.................................................69 MeasObjectEUTRA:: offsetFreq.........................................................................70

4.1.2.5.3 EventA3 and HO Measurement: ALGORITHM and CONFIGURATION ........................70 4.1.2.6 NEIGHBOR CELL INFORMATION PROVIDED TO UES IN CONNECTED MODE...73

LteNeighboringCellRelation:: cellIndividualOffset ..........................................74 4.1.2.7 MOBILITY TRIGGER MANAGEMENT........................................................................74 4.1.2.7.1 Intra-frequency handover ....................................................................................................74 4.1.2.7.2 Reception of a RRCConnection including the mobility ControlInformation by the UE (handover) 75

UeTimers:: t304 ...................................................................................................77 4.1.2.7.3 TARGET CELL SELECTION ...........................................................................................78

LteNeighboringCellRelation:: noHO..................................................................79 X2Access:: noX2HO ...........................................................................................80 LteNeighboringCellRelation:: relativeCellIdentity............................................80 LteNeighboringCellRelation:: macroEnbId.......................................................81 LteNeighboringCellRelation:: physicalLayerCellIdentityGroupIndex ............82 LteNeighboringCellRelation:: physicalLayerCellIdentityIndex .......................82 LteNeighboringCellRelation:: plmnMobileCountryCode .................................83 LteNeighboringCellRelation:: plmnMobileNetworkCode ................................83

4.1.2.7.4 HANDOVER TYPE SELECTION.....................................................................................84 4.1.2.7.4.1 ..........X2-C INTERFACE NOT AVAILABLE 84

4.1.2.7.5 TARGET eNB NOT CONNECTED TO SERVING MME................................................85 4.1.2.7.5.1 ..........X2 HANDOVER REJECTED WITH APPROPRIATE CAUSE 87 4.1.2.7.5.2 ..........Selection of S1 HANDOVER or X2 HANDOVER BASED ON CONFIGURATION........................... 88

4.2 INTER-FREQUENCY MOBILITY FOR LTE .....................................................................................88

4.2.1 RRC IDLE MODE MOBILITY ...........................................................................................88 4.2.1.1 CELL RESELECTION activation .................................................................................89

ActivationService:: isCellReselectionToInterFreqAll owed ...........................89 4.2.1.2 SYSTEM INFORMATION BLOCK TYPE5 ..................................................................89 4.2.1.3 CELL RESELECTION ALGORITHM DESCRIPTION .................................................89 4.2.1.3.1 CELL SELECTION CRITERION......................................................................................89


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CellReselectionConfInterFreq:: qRxLevMin .....................................................90 CellSelectionReselectionConf:: sNonIntraSearch ...........................................91 LteNeighboringFreqConf:: measurementBandwidth.......................................91

4.2.1.3.2 EQUAL PRIORITY INTER-FREQUENCY CELL RESELECTION CRITERIA ............91 CellReselectionConfInterFreq:: cellReselectionPriority.................................92 CellReselectionConfInterFreq:: offsetFreq......................................................92 LteNeighboringFreqConf:: priorityOfFreq .......................................................92

4.2.1.3.3 E-UTRAN INTER-FREQUENCY CELL RESELECTION CRITERIA ...........................93 CellReselectionConfInterFreq:: threshXHigh ..................................................93 CellReselectionConfInterFreq:: threshXLow...................................................93 CellReselectionConfInterFreq:: tReselectionEUTRAN ...................................94

4.2.2 RRC connected MODE MOBILITY...................................................................................94 4.2.2.1 MOBILITY ACTIVATION..............................................................................................94

ActivationService:: isInterFreqHOAllowed............ ..........................................94 ActivationService :: isInterFreqBlindRedirectionAllo wed..............................95

4.2.2.2 INTER-FREQUENCY INTer-eNB HO..........................................................................95 4.2.2.2.1 Trigger of handover.............................................................................................................95 4.2.2.2.2 INTER-FREQUENCY INTER-eNB X2 Handover .........................................................95 4.2.2.2.3 INTER-FREQUENCY Inter-eNB S1 Handover..............................................................95

4.2.2.3 INTER-FREQUENCY MEASUREMENT REPORTING SETTING..............................96 4.2.2.3.1 MEASUREMENT UPDATE UPON COMPLETION OF HANDOVER..........................96

LteNeighboringFreqConf:: dlEARFCN ..............................................................96 4.2.2.4 Measurements CONFIGURATION..............................................................................96 4.2.2.4.1 measurement configuration for inter-freq HO.....................................................................97 4.2.2.4.2 measurement configuration for blind redirection ................................................................97 4.2.2.4.3 measurement configuration for gap.....................................................................................97 4.2.2.4.4 Inter-frequency measurement at call setup..........................................................................97

4.3 MEASUREMENTS CONFIGURATION .....................................................................................101

4.3.1 MEASUREMENT CONFIGURATION MODEL...............................................................101 4.3.1.1 RrcMeasurementConf................................................................................................102

RrcMeasurementConf:: filterCoefficientRSRP ...............................................103 RrcMeasurementConf:: filterCoefficientRSRQ...............................................104 RrcMeasurementConf:: measurementIdentityConfIdList..............................105 RrcMeasurementConf:: sMeasure...................................................................106

4.3.1.2 REPORTCONfig/reportconfig EUTRA.......................................................................107 ReportConfigEUTRA:: triggerQuantity ...........................................................107 ReportConfigEUTRA:: reportQuantity ............................................................108 ReportConfigEUTRA:: maxReportCells ..........................................................110 ReportConfigEUTRA:: hysteresis....................................................................112 ReportConfigEUTRA:: timeToTrigger .............................................................114 ReportConfigEUTRA:: reportInterval ..............................................................115 ReportConfigEUTRA:: reportAmount .............................................................116

4.3.1.3 THRESHOLDS FOR INTER-RAT MOBILITY WITH INTRA-LTE MEASUREMENTS: Blind 117

ReportConfigEUTRA:: triggerTypeEUTRA .....................................................118 ReportConfigEUTRA:: eventA3Offset .............................................................119 ReportConfigEUTRA:: thresholdEutraRsrp....................................................120 ReportConfigEUTRA:: thresholdEutraRsrq....................................................121

4.3.1.4 SPEED STATE MEASUREMENTS CONFIGURATION ...........................................123 SpeedStateEvalConf:: tEvaluation ..................................................................124 SpeedStateEvalConf:: nCellChangeHigh........................................................124 SpeedStateEvalConf:: nCellChangeMedium ..................................................125 SpeedStateEvalConf:: tHystNormal ................................................................125 TimeToTriggerConf:: timeToTriggerSfHigh....................................................125 TimeToTriggerConf:: timeToTriggerSfMedium ..............................................126

4.4 AUTOMATIC NEIGHBOUR RELATION (ANR) CONFIGURATION AND OPTIMISATION ............126


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4.4.1 ANR Overview ................................................................................................................126 ActivationService:: anrEnable .........................................................................128

4.4.2 ANR neighbor relation creation function .........................................................................129 4.4.2.1 ANR in Active Phase - Discover Neighbor Relation through UE Reporting ..............129 4.4.2.1.1 Parameters Included in a NEIGHBOR RELATION.........................................................130

LteNeighboringCellRelation:: discoveredByAnr............................................132 LteNeighboringCellRelation:: noRemove .......................................................132

4.4.2.1.2 ANR MEASUREMENT CONFIGURATION .................................................................132 ReportConfigEUTRA:: threshold2EutraRsrp..................................................136 ReportConfigEUTRA:: threshold2EutraRsrq..................................................136

4.4.2.1.3 DRX Configuration for ECGI Retrieving .........................................................................137 AutomaticNeighborRelation:: drxCycleForReportCGI ..................................137 AutomaticNeighbourRelation:: isLcgRemovalAllowed .................................138

4.4.2.1.4 Set Up X2 links .................................................................................................................138 X2Access:: macroEnbId ...................................................................................140 X2Access:: noRemove .....................................................................................140 X2Access:: plmnMobileCountryCode .............................................................141 X2Access:: plmnMobileNetworkCode.............................................................141

4.4.2.2 Receiving Neighbor Relation through X2 Messages .................................................142 4.4.2.3 End of Active Phase...................................................................................................143

AutomaticNeighbourRelation:: activePhaseMeasReportHysteresis............143 AutomaticNeighborRelation:: activePhaseMeasReportThreshold...............144

4.4.2.4 ANR in Dormant/Wake-up Phase ..............................................................................144 AutomaticNeighborRelation:: dormantPhaseTimerForEcgiDiscovery ........145

4.4.2.5 ANR Neighbor Relation Maintenance Function - Garbage Collection.......................146 4.4.2.6 ANR Synchronization Function ..................................................................................146 4.4.2.7 ANR Reset Function ..................................................................................................146

5 EUTRAN TO UTRAN INTER-RAT MOBILITY FOR LTE (USE CAS ES & CONTROL PROCEDURES) ...................................................................................................................................148

5.1 RRC IDLE MODE MOBILITY: ..............................................................................................148

5.1.1 CELL RESELECTION ACTIVATION..............................................................................148 ActivationService:: isCellReselectionToUtraTddAllowed ............................148 LteCell:: utraTddNeighboringCellRelationIdList ............................................149

5.1.2 SYSTEMINFORMATIONBLOCKTYPE 6 AND SIB3 INTER-WORKING.......................149 5.1.3 CELL RESELECTION ALGORITHM DESCRIPTION ....................................................150

5.1.3.1 CELL SELECTION CRITERION................................................................................150 CellReselectionConfUtraTdd:: qRxLevMin .....................................................152 CellReselectionConfUtraTdd:: pMaxUTRA .....................................................153 CellSelectionReselectionConf:: sNonIntraSearch .........................................154 CellSelectionReselectionConf:: cellReselectionPriority ...............................155

5.1.3.1.1 MIM MODEL ...................................................................................................................156 5.1.3.2 CELL RESELECTION PRIORITIES HANDLING ......................................................157

UeTimers:: t320 .................................................................................................158 5.1.3.3 UE SPEED MANAGMENT ........................................................................................159

UtraSpeedConf:: tReselectionUtraSfHigh.......................................................160 UtraSpeedConf:: tReselectionUtraSfMedium .................................................160

5.1.3.4 E-UTRAN INTER-FREQUENCY AND INTER-RAT CELL RESELECTION CRITERIA161 CellSelectionReselectionConf:: tReselectionUtra .........................................162 CellSelectionReselectionConf:: threshServingLow.......................................163 CellReselectionConfUtraTdd:: threshXHigh...................................................163 CellReselectionConfUtraTdd:: threshXLow....................................................164

5.1.3.5 ALGORITHM FOR CELL RESELECTION PRIORITY ..............................................165


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FrequencyAndBandwidthTDD:: priorityOfFreq..............................................167 UtraTddNeighboringFreqConf:: bandUtraTdd128..........................................168 UtraTddNeighboringFreqConf:: bandUtraTdd384..........................................168 UtraTddNeighboringFreqConf:: bandUtraTdd768..........................................169 UtraTddNeighboringFreqConf:: carrierFreq ...................................................169

5.1.3.6 LTE TO UTRA tDD reselection configuration ............................................................169 5.2 RRC CONNECTED MODE MOBILITY: ...............................................................................170

5.2.1 REDIRECTION ACTIVATION ........................................................................................171 ActivationService:: isRedirectionToUtraTddAllowed ...................................171

5.2.2 CONTROL PROCEDURES FOR RADIO MEASUREMENTS CONFIGURATION AND MOBILITY TRIGGER MANAGEMENT ...........................................................................................172

5.2.2.1 MEASUREMENTS CONFIGURATION AT CALL SETUP ........................................172 5.2.2.2 RRC MEASUREMENTS CONFIGURATION: USAGE OF MIM MODEL..................174 5.2.2.3 CONTROL OF UE MOBILITY IN RRC CONNECTED STATE: REDIRECTION EUTRA-TO-UTRA-TDD ................................................................................................................176 5.2.2.3.1 EXECUTION PHASE: .....................................................................................................177 5.2.2.3.2 COMPLETION PHASE: ..................................................................................................178 5.2.2.3.3 SYSTEM CALL FLOW: ..................................................................................................178

5.2.2.4 ALGORITHM FOR RRC MEASUREMENT CONFIGURATION................................179 5.2.2.5 SPEED STATE MEASUREMENTS CONFIGURATION ...........................................180 5.2.2.5.1 MIM MODEL ...................................................................................................................180

5.2.2.6 LTE TO UTRAN MEASUREMENT REPORTING SETTING.....................................181 MeasObjectUTRA:: offsetFreqUTRA ...............................................................181

5.2.2.7 NEIGHBOR CELL INFORMATION PROVIDED TO UES IN CONNECTED MODE.181 UtraTDDNeighboringCellRelation:: physCellIdUTRATDD .............................182 UtraTDDNeighboringCellRelation:: utraTDDNeighboringFreqConfId ..........183

5.2.2.8 AT CALL SETUP OR AN INCOMING MOBILITY .....................................................183 5.2.2.8.1 GOOD RADIO CONDITIONS:INTRA-FREQUENCY(A3);INTER-RAT(B2): ............183 5.2.2.8.2 BLIND REDIRECTION:RECEPTION OF EVENT A2_BLIND:...................................186

5.2.2.9 STATE DIAGRAM OF RADIO CONDITIONS ...........................................................188 5.2.3 LTE TO UTRAN MEASUREMENTS CONFIGURATION...............................................189

5.2.3.1 RRCMEASUREMENTCONF.....................................................................................190 RrcMeasurementConf:: measQuantityUtraTdd ..............................................191 RrcMeasurementConf::filterCoefficientOfQuantityConf igUtra ....................191

5.2.3.2 REPORTCONFIGUTRAN:.........................................................................................191 ReportConfigUTRA:: maxReportCells ............................................................192 ReportConfigUTRA:: hysteresis ......................................................................193 ReportConfigUTRA:: timeToTrigger................................................................194 ReportConfigUTRA:: reportInterval.................................................................195 ReportConfigUTRA:: reportAmount................................................................196

5.2.3.3 THRESHOLDS FOR INTER-RAT MOBILITY and MEASUREMENTS for EVENT B2196 ReportConfigUTRA:: triggerTypeInterRAT .....................................................198 ReportConfigUTRA:: threshold1EutraRsrp ....................................................199 ReportConfigUTRA:: threshold1EutraRsrq ....................................................199 ReportConfigUTRA:: threshold2UtraRscp......................................................200

5.3 EUTRAN-TO-UTRAN-TDD PS HANDOVER........................................................................201

UtraTddNeighboringCellRelation:: voiceOverIpEnabled...............................201 5.3.1 Blind PS Handover Activation and Measurement Configuration ....................................202

ActivationService:: isBlindPsHoToUtraTddAllowed......................................202 RncAccess:: psHandoverUtraEnabled ...........................................................203

5.3.2 Blind PS Handover Triggering and Target Cell Selection...............................................204 UtraTddNeighboringCellRelation:: rncAccessId............................................204 UtraTddNeighboringFreqConf:: priorityOfBandUtraTdd ...............................205

5.3.3 Control of PS Handover ..................................................................................................205


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RncAccess:: plmnMobileCountryCode...........................................................207 RncAccess:: plmnMobileNetworkCode ..........................................................208 RncAccess:: rncId ............................................................................................208 RncAccess:: extendedRncId............................................................................209 UtraTddNeighboringCellRelation:: lac ............................................................209 UtraTddNeighboringCellRelation:: rac............................................................210 RncAccess:: directFwdPathAvailability..........................................................211 UtraTddNeighboringCellRelation:: cId ............................................................212 PsHoToUtraTimersConf:: tS1RelocPrepForPsHandoverToUtra...................212 PsHoToUtraTimersConf:: tS1RelocOverallForPsHandoverToUtra ..............213

5.3.3.1 FAILURE CASES.......................................................................................................214 5.3.4 MIM Model for EUTRAN-to-UTRAN-TDD PS Handover ................................................215

RADIOBEARERCONF:: dataForwardingForPsHoToUtraTddEnabled ..........216 RADIOBEARERCONF:: psHoToUtraTddEnabled...........................................216

6 EUTRAN TO GERAN INTER-RAT MOBILITY FOR LTE (USE CAS ES & CONTROL PROCEDURES) ...................................................................................................................................217

6.1 RRC IDLE MODE MOBILITY: ..............................................................................................217

6.1.1 CELL RESELECTION ACTIVATION..............................................................................218 ActivationService:: isCellReselectionToGeranAllowed ...............................218

6.1.2 CELL RESELECTION ALGORITHM DESCRIPTION ....................................................218 6.1.2.1 CELL SELECTION CRITERION................................................................................219

CellReselectionConfGERAN:: qRxLevMin......................................................221 CellReselectionConfGERAN:: pMaxGeran .....................................................222 CellSelectionReselectionConf:: sNonIntraSearch .........................................223 CellSelectionReselectionConf:: cellReselectionPriority ...............................224 CellReselectionConfGERAN:: nccPermitted ..................................................224

6.1.2.2 CELL RESELECTION PRIORITIES HANDLING ......................................................224 6.1.2.3 UE SPEED MANAGEMENT......................................................................................225

GeranSpeedConf:: tReselectionGERANSfHigh..............................................226 GeranSpeedConf:: tReselectionGERANSfMedium ........................................227

6.1.2.4 E-UTRAN INTER-FREQUENCY AND INTER-RAT CELL RESELECTION CRITERIA227 GeranNeighboring:: tReselectionGERAN .......................................................229 CellReselectionConfGERAN:: threshXHigh....................................................230 CellReselectionConfGERAN:: threshXLow ....................................................230

6.1.2.5 ALGORITHM FOR CELL RESELECTION PRIORITY ..............................................232 GeranNeighboringFreqsConf:: priorityOfFreqs .............................................233 GeranNeighboringFreqsConf:: BandIndicatorGERAN ..................................233 GeranNeighboringFreqsConf:: GeranARFCNList ..........................................234 GeranNeighboringFreqsConf:: bandGERAN..................................................234

6.1.2.6 LTE TO GERAN RESELECTION CONFIGURATION...............................................234 6.2 RRC CONNECTED MODE MOBILITY: ...............................................................................235

6.2.1 REDIRECTION ACTIVATION ........................................................................................238 ActivationService:: isRedirectionToGERANAllowed....................................239

6.2.2 CONTROL PROCEDURES FOR RADIO MEASUREMENTS CONFIGURATION AND MOBILITY TRIGGER MANAGEMENT ...........................................................................................239

6.2.2.1 MEASUREMENTS CONFIGURATION AT CALL SETUP ........................................239 6.2.2.2 ALGORITHM FOR RRC MEASUREMENT CONFIGURATION................................241 6.2.2.3 SPEED STATE MEASUREMENTS CONFIGURATION ...........................................242

6.2.3 LTE TO GERAN MEASUREMENT REPORTING SETTING .........................................242 6.2.3.1 LTE TO GERAN MeasurEMENT REPORTING SETING:.........................................242

MeasObjectGERAN:: offsetFreqGERAN .........................................................244 MeasObjectGERAN:: nccPermitted.................................................................244

6.2.4 LTE TO GERAN MEASUREMENTS CONFIGURATION...............................................244 6.2.4.1 RRCMEASUREMENTCONF.....................................................................................248


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RrcMeasurementConf:: measQuantityGERAN...............................................248 RrcMeasurementConf::filterCoefficientOfQuantityConf igGERAN ..............248 RrcMeasurementConf:: transmissionGapRepetitionPeriod .........................249

6.2.4.2 REPORTCONFIGGERAN: ........................................................................................249 ReportConfigGERAN:: maxReportCells .........................................................249 ReportConfigGERAN:: triggerTypeInterRAT ..................................................250 ReportConfigGERAN:: hysteresis ...................................................................251 ReportConfigGERAN:: timeToTrigger.............................................................252 ReportConfigGERAN:: reportInterval..............................................................253 ReportConfigGERAN:: reportAmount.............................................................254

6.2.4.3 THRESHOLDS FOR INTER-RAT MOBILITY:...........................................................254 ReportConfigGERAN:: threshold1EutraRsrp .................................................255 ReportConfigGERAN:: threshold1EutraRsrq .................................................256 ReportConfigGERAN:: B2ThresholdGERAN ..................................................256 ActivationService:: isGeranCcoAllowed........................................................257 ActivationService:: isDSIMallowed ................................................................257 BscAccess:: rimForNaccEnabled....................................................................257

8 ANNEX:............................................. .............................................................................................258

8.1 ABBREVIATIONS ................................................................................................................258

8.2 INTRA-FREQUENCY INTRA-ENB CALL FLOW: ................................................................262

8.3 INTRA-FREQUENCY INTER-ENB CALL FLOW .................................................................263


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TABLES

Table 1: Cell Reselection Criteria parameters 17 Table 2: Transmission bandwidth configuration NRB in E-UTRA channel bandwidths 20 Table 3: Cell Ranking Procedure parameters 21 Table 4: Measurements of EUTRAN TDD cells selection [3GPP 36133]. 23 Table 5: Mobility information parameters 36 Table 6: Measurement information parameters 64 Table 7: Mobility activation and information parameters 89 Table 8: Mobility activation and information parameters Error! Bookmark not defined. Table 9: MeasConfig information element 105 Table 10: ReportConfigEUTRA information element 112 Table 11: Mobility activation and information parameters Error! Bookmark not defined. Table 12: Cell Reselection Criteria parameters 151 Table 13: UE power Class vs. maximum output power, Pumax. 154 Table 14: Measurements of UTRAN TDD cells selection [3GPP 36133]. 162 Table 15: Mobility activation and information parameters Error! Bookmark not defined. Table 16: ReportConfigInterRAT field descriptions 192 Table 17: Mobility activation and information parameters Error! Bookmark not defined. Table 18: Cell Reselection Criteria parameters 220 Table 19: Maximum TX power level 222 Table 20: UE power Class vs. maximum output power, Pumax. 223 Table 21: Mobility activation and information parameters Error! Bookmark not defined. Table 22: ReportConfigInterRAT field descriptions 250


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FIGURES

Figure 1: The Definition of Channel Bandwidth and Transmission Bandwidth Configuration for one E-UTRA carrier.................................................................................................................................... 20

Figure 2 : Cell Reselection criteria intra-LTE ................................................................................................. 24 Figure 3 : MIM Model SPEEDDEPENDENTBROADCASTCONF .............................................................. 33 Figure 4 : Intra-LTE reselection configuration ................................................................................................ 34 Figure 5 : Mobility activation ............................................................................................................................. 36 Figure 6 : Call flow for Intra-eNB mobility - UE in RRC CONNECTED ...................................................... 38 Figure 7: Call flow for Inter-eNB mobility, X2 HO - UE in RRC CONNECTED ......................................... 44 Figure 8: Call flow for Inter-eNB mobility, S1 HO - UE in RRC CONNECTED ......................................... 53 Figure 9: Measurement setup at call setup .................................................................................................... 65 Figure 10: Measurement update upon handover inter-eNB handover.................................................... 67 Figure 11: Measurement update upon handover intra-eNB handover.................................................... 68 Figure 12 : Parameters in relationship with Event A3: Entering condition ................................................. 72 Figure 13 : EventA3 measurments configuration .......................................................................................... 72

Figure 14: LTE cell/eNB neighborhood MIM model TLA2.1 ........................................................................ 84 Figure 15 : MME pools Handover type decision......................................................................................... 86 Figure 16: Inter-frequency measurement configuration 1 ........................................................................... 99 Figure 17 : Inter-frequency measurement configuration 2 ......................................................................... 100 Figure 18 : Measurement configuration MIM model in TLA2.1 ................................................................. 101 Figure 19 : Hysteresis used to tuning HO decision, reportAmount = 4 .................................................... 115 Figure 20 : Redirection towards another RAT or carrier ............................................................................ 122 Figure 21 : Blind and intraFreq Measurements for redirection towards another RAT or carrier ......... 123 Figure 22 : ANR Phases.................................................................................................................................. 128 Figure 23 : Intra-Frequency Neighbor Cell Search ..................................................................................... 129 Figure 24 : S1 Procedure for Neighbor eNB X2 IP Address Retrieval ..................................................... 139 Figure 25 : Snonintrasearch drive cell detection frequency and lower priority cell detection. ............. 155 Figure 26 : MIM Model UTRATDDNEIGHBORING .................................................................................... 157 Figure 27 : Reselection configuration towards UTRAN cell. ...................................................................... 170 Figure 28 : Measurement setup at call setup ............................................................................................... 173 Figure 29 : RRC Measurements Configuration inter-RAT mobility ........................................................... 176 Figure 30 : Call flow Redirection EUTRA-TO-UTRA-TDD ......................................................................... 179 Figure 32 : Inter RAT threshold for Event B2 ............................................................................................... 184 Figure 33 : Call Flow for mobility INTRA-FREQUENCY (A3;A2_BLIND);INTER-RAT(B2) .................. 185 Figure 34 : waits for an intra-frequency measurement report or an inter-RAT measurement report... 186 Figure 35 : Inter RAT threshold for Event A2_blind .................................................................................... 187 Figure 36 : State diagram of radio conditions TLA2.1 ................................................................................ 189 Figure 37 : UTRA Event B2 Configuration.................................................................................................... 190 Figure 38 : Hysteresis used to tuning HO decision, reportAmount = 4 .................................................... 195 Figure 39 : Event B2 : Entering conditions ................................................................................................... 198 Figure 40: Call Flow for EUTRAN-to-UTRAN-TDD PS Handover ........................................................... 206 Figure 41: MIM Model for EUTRAN-to-UTRAN-TDD PS Handover........................................................ 215 Figure 42 : Reselection from eUTRAN to GERAN ...................................................................................... 217 Figure 43 : User Case, with UE Class3 and in the same PLMN, showing reselection towards lower

priority GERAN cell. ................................................................................................................................. 231 Figure 44 : LTE to GERAN reselection MIM configuration. ....................................................................... 235 Figure 45 : Redirection from eUTRAN to GERAN....................................................................................... 236 Figure 46 : Measurement setup at call setup ............................................................................................... 241 Figure 47 : Data model for MeasObjectGERAN .......................................................................................... 243 Figure 48: Hysteresis used to tuning HO decision, reportAmount = 4...................................................253


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1 INTRODUCTION

1.1 OBJECT

The objective of this document is to describe from an engineering point of view the Mobility algorithms and parameters applicable to LTE system.

This includes a system description, configuration aspect and engineering recommendations.

1.2 SCOPE OF THIS VOLUME

This document provides configuration information for LTE eNodeB products in LTE Release TLA2.1 (drops TLA2.1.1, TLA2.1.2, and TLA2.1.3) for the Time Division Duplex (TDD) implementation. Information that is added in this edition to support the TLA2.1 drops is colored with a gray background as illustrated by this paragraph.

References to LA0.x, LA1.0, and TLA2.0 in this volume refer to features that became available in those releases.

For an LTE release earlier than TLA2.1, please refer to the LPUG Edition that supports that release.

Engineering Recommendation: Parameter Values

Parameter values provided in this version of the LPUG document reflect the best information available at the time of publication.

If a newer SW delivery is used, then the related Release Notes should be consulted for newer parameter values.

Restriction: Frequency Division Duplex (FDD) System

Support for the Frequency Division Duplex (FDD) implementation will be provided in a separate document.

Restriction: eNodeB equipments type covered

The Femto & Pico eNodeB product are out of scope of this document, thus all engineering information, algorithms description and parameters values provided in this document are strictly related to standard Alcatel-Lucent eNodeB products.


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1.3 LIST OF RELATED FEATURES

The system aspects described in this volume are related to the following features:

LA0.x

Feature Number Feature Title

Release

FRS 34348 Commercial LTE Introduction Call Processing, RRM, MM LA0.1

FRS 75908 Seamless Intra-LTE Mobility LA0.2

LA1.0


Release

FRS 76501 3GPP Alignment LA1.0

FRS 76500 Lossless Intra-LTE Handover LA1.0

TLA2.0


Release

FRS 82729 S1 Flex Introduction TLA2.0

TLA2.1

Feature Number

Feature Title Release

FRS 97933 Dynamic SysInfo Modification under Cell Parameter Change TLA2.1

FRS 98841 Inter-eNB S1 HO with MME&SGW Relocation for Inter-vendor Mobility

TLA2.1

FRS 97979 Support of Partial Handover Failure TLA2.1

FRS 97941 Support of new mobility procedure interactions TLA2.1

FRS 97940 Handover Cancel Support TLA2.1

FRS 84807 eUTRAN to GERAN Inter-RAT Mobility Cell Reselection and redirection LA2.0

TLA2.1

FRS 105474 Inter-RAT handover from LTE to TD-SCDMA TLA2.1

FRS 103791 Inter-frequency Cell reselelction for multi-band support

TLA2.1

FRS 96760 eNB Configuration Update Enhancements TLA2.1


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FRS 81872 Automatic Neighbour Relation Configuration and Optimisation TLA2.1

Whenever possible and/or necessary, a reference is given to the feature in question (parameter tables) or to (one of) its requirements.

2 RELATED DOCUMENTS AND PREREQUISITES

2.1 LPUG VOLUMES

[Vol. 1] Introduction

[Vol. 2] LTE Overview

[Vol. 3] LTE Air Interface

[Vol. 4] Radio Resource Management

[Vol. 5] Call Management

[Vol. 6] Mobility

[Vol. 7] Transport

[Vol. 8] Hardware

[Vol. 9] OAM

2.2 REFERENCE DOCUMENTS

[R01] 3GPP TS 36.211: "Evolved Universal Terrestrial Radio Access (E-UTRA); Physical channels and modulation".( 2009-06 )

[R02] 3GPP TS 36.212: "Evolved Universal Terrestrial Radio Access (E-UTRA); Multiplexing and channel coding".( 2009-06 )

[R03] 3GPP TS 36.213: "Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer procedures".( 2009-06 )

[R04] 3GPP TS 36.401: Evolved Universal Terrestrial Radio Access Network (E-UTRAN; Architecture description R8 .( 2009-06 )

[R05] 3GPP TS 36.300: " Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN) Overall description Stage 2".( 2009-06 )


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[R06] 3GPP TS 23.003: "Numbering, addressing and identification".( 2009-06 )

[R07] 3GPP TS 23.401: "GPRS enhancements for E-UTRAN access".(2009-06)

[R08] 3GPP TS 36.331: Evolved Universal Terrestrial Radio Access Network (E-UTRAN; Radio Resource Control (RRC) ( 2009-06 )

[R09] 3GPP TS 36.321: Evolved Universal Terrestrial Radio Access Network (E-UTRAN; Redium Access Control (MAC) R8 .( 2009-06 )

[R10] 3GPP TS 36.322: Evolved Universal Terrestrial Radio Access Network (E-UTRAN; Radio Link Control (RLC) R8 .( 2009-06 )

[R11] 3GPP TS 22.011: Service accessibility .( 2009-06 )

[R12] 3GPP TS 36.101: Evolved Universal Terrestrial Radio Access (E-UTRA); User Equipment (UE) radio transmission and reception. ( 2009-06 )

[R13] 3GPP TS 36.413: Evolved Universal Terrestrial Radio Access (E-UTRA); S1 Application Protocol (S1AP) ( 2009-06 v8.6.1)

[R14] 3GPP TS 36.304 Evolved Universal Terrestrial Radio Access (E-UTRA); User Equipment (UE) procedures in idle mode ( 2009-06 )

[R15] 3GPP TS 23.122 "NAS functions related to Mobile Station (MS) in idle mode". ( 2009-06 )

[R16] 3GPP2 C.S0005-A: "Upper Layer (Layer 3) Signalling Standard for cdma2000 Spread Spectrum Systems".( 2009-06 )

http://www.3gpp.org/ftp/Specs/html-info/36304.htm

2.3 PREREQUISITES FOR READING THIS VOLUME

Before reading this volume, the reader should read the introduction (Volume 1). Volume 1 provides an explanation of the presentation and conventions that are used throughout the document (i.e., common to all volumes).

3 OVERVIEW

This volume depicts the LTE Parameters regarding Mobility features. The granularity of all Mobility parameters is Cell by Cell.

This document is built in the same chronological order of the events attributed to the work of the mobile and the network, like if you begin to attach the mobile to the network and after you moved with this one.


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In first step, you moved in idle mode and reselection process is used by your mobile.

In second step, you are on call, and Handover process is practiced by your mobile.

These two steps are reported for each type of mobility features.

It specifies:

intra-LTE mobility features, covering the control plane aspects. The management of intra-LTE and inter-LTE measurements configuration is also specified in this document.

Inter-RAT mobility features, covering control plane aspects, regarding the two following mobilities:

o eUTRAN to UTRAN Inter-RAT Mobility Cell Reselection and redirection

o eUTRAN to GERAN Inter-RAT Mobility Cell Reselection and redirection (TLA2.1.3)

4 INTRA-RAT MOBILITY FOR LTE

4.1 INTRA-FREQUENCY MOBILITY FOR LTE

4.1.1 RRC IDLE MODE MOBILITY

Cell Reselection is a procedure lunched by the UE in Idle Mode to determine which LTE cell to camp on. The trigger can be internal (e.g. periodic trigger to ensure that UE is still on the best cell) or external (e.g. upon change of Cell Reselection parameters broadcast on the selected cells BCH). The cell selection and reselection is controlled by the System Information parameters provided in SIB1 and SIB3. Cell Reselection is a procedure triggered by UEs in Idle Mode to determine which LTE cell to camp on. When a UE, camps on a cell it monitors its broadcast and paging channels. The procedure is internal to the UE and there is therefore no E-UTRA level use case for it.

Access Class Barring are introduced in TLA2.0 (to see [Vol. 5] and [R14] for more details.), minor changes regarding this part for TLA2.1.

The cell selection and reselection is controlled by the System Information parameters provided in SIB1 and SIB3, 3GPP [R08] .

Before cell reselection algorithm description, we depict inter tracking area mobility.


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4.1.1.1 INTER TRACKING AREA MOBILITY:

When the UE is in RRC-Idle state, its position is known by the network on a per Tracking Area (TA) basis. In case of network originated transition from RRC-idle to RRC-connected, the network will page the UE across the whole Tracking AreaTracking area mobility is supported by the System Information broadcast of TAI.

The TA Code information is broadcast on the BCCH channel on SIB-1.

When the UE enters a new cell which belongs to a TAI where it is not registered it will initiate the TAU procedure.

Rule: Regarding TLA2.1

In TLA2.1, the TA identity is provisioned by OAM on a per cell basis, like in TLA2.0

The corresponding MIM parameters are described below.

trackingAreaCode: 3GPP 36.331 This parameters identifies the TAC (Tracking Area Code) to which the cell belongs. A trackingAreaCode that is common for all the PLMNs listed.

LteCell:: trackingAreaCode

Parameter trackingAreaCode

Object Enb/ LteCell

Range & Unit BitString

stringMinLength = 16

string Length = 16

Class/Category A / Fixed

Value O.D. See Engineering Recommendation

Feature FRS 96760, 97933

Engineering Recommendation: trackingAreaCode

We recommend that the operator always puts the cell s of a given eNB in the same tracking area.


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trackingAreaCode : 3GPP 36.331 This parameter identifies the Tracking Area Code to which belongs the cell.

LteNeighboringCellRelation:: trackingAreaCode

Parameter trackingAreaCode

Object Enb/ LteCell/ LteNeighboringCellRelation

Range & Unit BitString

stringMinLength = 16

Maxlength = 16

Class/Category C / Fixed

Value O.D (set by ANR function or by operator)

Feature 81872

4.1.1.2 PLMN SELECTION & CELL RESERVATION AND CELL RESTRICTION:

Note: PLMN Selection Procedure in depict in [Vol. 5] section 7 (Call Handling). The mechanism of cell reservation and cell restriction will play on the intra LTE mobility procedures for Idle mobiles. This procedure is depicted in [Vol. 5] Section 7 Call Handling.

4.1.1.3 CELL RESELECTION ALGORITHM DESCRIPTION

Cell Reselection is a procedure run in the UE that relies on:

- Measured RF quality related metrics of camped on and detected cells

- System parameters broadcast by the cell on which the UE is currently camping on.

4.1.1.3.1 CELL SELECTION CRITERION

The cell selection S criterion (Calculated by the UE) is fulfilled when:

Srxlev > 0

Where: Srxlev = Qrxlevmeas (Qrxlevmin + Qrxlevminoffset) - Pcompensation

Where: The signalled value QrxlevminOffset is only applied when a cell is evaluated for cell selection as a result of a periodic search for a higher priority PLMN while camped normally in a VPLMN [R14]. During this periodic search for higher priority PLMN the UE may check the S criteria of a cell using parameter values stored from a different cell of this higher priority PLMN.


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Srxlev Calclated by

the UE Cell Selection RX level value (dB).

Qrxlevmeas Measured by the UE

Measured cell RX level value. This is received signal, P-CCPCH RSCP for TDD cells (dBm).

Qrxlevmin qRxLevMin or qRxLevMinIntraFreqNeighbour

Minimum required RX level in the cell (dBm).

Qrxlevminoffset

qRxlevminoffset

Offset to the signalled Qrxlevmin taken into account in the Srxlev evaluation as a result of a periodic search for a higher priority PLMN while camped normally in a VPLMN [5] (SIB1)

Pcompensation

Calculated by the UE

max(Pemax Pumax, 0) (dB).

Pemax Hardcoded

Maximum TX power level an UE may use when transmitting on the uplink in the cell (dBm) defined as PEMAX in [TS 36.101] and the value is provided by IE p-Max if a value is signalled to a UE (see TS 36.331). Note that signalling the value of p-Max to a UE is not supported in TLA2.1. But this is scheduled for future release.

Pumax Hardcoded Maximum RF output power of the UE (dBm) according to the UE power class as defined in [TS 36.101] and fixed to 23dBm for UE class 3 (for all the EUTRA band)

Table

1: Cell Reselection Criteria parameters

In order to further restrict the amount of measurement carried out by the UE in RRC-Idle mode, the following rules are used by the UE:

Sintrasearch : This specifies the threshold (in dB ) for intra frequency measurements. MIM parameter is sIntrasearch

If SServingCell > Sintrasearch , UE may choose to not perform intra-frequency measurements . (SServingCell is a S Criterion in the Serving cell, i.e SServingCell = SRxLev like formula above)

If SServingCell Sintrasearch , or CellSelectionReselectionConf:: sIntrasearch is not sent in the serving cell, UE shall perform intra-frequency measurements .

Where: SservingCell = Qrxlevmeas (Qrxlevmin + Qrxlevminoffset) - Pcompensation

qRxLevMin : 3GPP 36.331[R08] This parameter configures the serving cell min required RSRP level used by the UE in cell reselect ion . The value sent over

Restriction: Regarding TLA2.1 and Pemax

Note: Information Element p-Max is not yet broadcasted for intra-LTE mobility, the UE ignores Pemax , and Pcompensation value is 0 .


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the RRC interface is half the value configured. Broadcast by the eNB in SystemInformationBlockType1

CellSelectionReselectionConf:: qRxLevMin

Parameter qRxLevMin

Object Enb/ LteCell/ CellSelectionReselectionConf

Range & Unit dBm

[-140..-44] step = 2

Class/Category C / Optimization - Tuning

Value -110 see Engineering Recommendation

Feature 96760

Parameter qRxLevMin in [R14]. Actual value Qrxlevmin = IE value*2 [dBm]. Specifies the minimum required Rx RSRP level in the cell. (Where IE value specify the message value send to the UE)

Changing this value will affect cell size in terms of re-selection area. Increasing this value will lead the mobile to start cell-selection/ re-selection procedure sooner and then will artificially decrease cell size in id le mode.

Engineering Recommendation: qRxLevMin

The field tests trial have shown best results with the value : -110 dBm This parameter has impact on idle mode coverage

qRxlevminoffset: This parameter defines an offset to be applied in cell selection

criteria by the UE when it is engaged in a periodic search for a higher priority PLMN. The value sent over the RRC interface is half the value configured Defined in TS 36.331. Broadcast by the eNB in SystemInformationBlockType1[R14]

CellSelectionReselectionConf:: qRxlevminoffset

Parameter qRxlevminoffset


Range & Unit dB

[2..16] step = 2


Value 2 (default:2)

Feature 96760

Note: If you do not use inter-PLMN mobility, this p arameter is inhibited.


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sIntraSearch : 3GPP 36.331 Threshold for serving cell reception level under which the UE triggers intra-frequency measurements for cell reselection (the actual value the UE will use is twice the configured value). The value sent over the RRC interface is half the value configured. For more details consult TS36.304. Broadcast in SystemInformationBlockType3

CellSelectionReselectionConf:: sIntraSearch

Parameter sIntraSearch


Range & Unit dB

[0..62] step = 2


Value 2 See Engineering Recommendation

Feature 96760

Engineering Recommendation: sIntraSearch

UE starts intra-frequency measurements for cell re-selection when serving cells RSRP value


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Measurement bandwidth information common for all neighbouring cells on the serving frequency. If absent, the value corresponding to the downlink bandwidth indicated by the dl-Bandwidth included in MasterInformationBlock applies. If bandwidth is larger within target cell than with in current cell, then its needed to inform UE. The IE MeasurementBandwidth used to indicate measurement bandwidth defined by the parameter Transmission Bandwidth Configuration "NRB" [TS 36.104]. The values mbw6, mbw15, mbw25, mbw50, mbw75, mbw100 indicate 6, 15, 25, 50, 75 and 100 resource blocks respectively. [R08]

Channel bandwidth BWChannel [MHz]

1.4 3 5 10 15 20

Transmission bandwidth configuration NRB

6 15 25 50 75 100

Table 2: Transmission bandwidth configuration NRB in E-UTRA channel bandwidths

Figure below shows the relation between the Channel bandwidth (BWChannel) and the Transmission bandwidth configuration (NRB). The channel edges are defined as the lowest and highest frequencies of the carrier separated by the channel bandwidth, i.e. at FC +/- BWChannel /2. For more information regarding the frame structure, you can refer to [Vol. 3] section 6.

Figure 1: The Definition of Channel Bandwidth and Transmission Bandwidth Configuration for one E-UTRA carrier

Note: As a general rule, the resolution bandwidth of the measuring equipment should be equal to the measurement bandwidth. However, to improve measurement accuracy, sensitivity and efficiency, the resolution bandwidth may be smaller than the

Transmission Bandwidth [RB]

Transmission Bandwidth Configuration [RB]

Channel Bandwidth [MHz]

Center subcarrier (corresponds to DC in baseband) is not transmitted in downlink

Active Resource Blocks

Channel edge

Channel edge

Resource block


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measurement bandwidth. When the resolution bandwidth is smaller than the measurement bandwidth, the result should be integrated over the measurement bandwidth in order to obtain the equivalent noise bandwidth of the measurement bandwidth.[R12] [TS 36.101]

4.1.1.3.2 INTRA-FREQUENCY AND EQUAL PRIORITY INTER-FREQUENCY CELL RESELECTION CRITERIA

The cell-ranking criterion Rs for serving cell and Rn for neighbouring cells is defined by [R14]:

Rs = Qmeas,s + QHyst Rn = Qmeas,n - Qoffset

where:

Qmeas RSRP measurement quantity used in cell reselections . The quality value of the received signal derived from the averaged P-CCPCH RSCP for TDD cells

Qoffset qOffsetCell For intra-frequency : Equals to Qoffsets,n, if Qoffsets,n is valid, otherwise this equals to zero. For inter-frequency : Equals to Qoffsets,n plus Qoffsetfrequency, if Qoffsets,n is valid, otherwise this equals to Qoffsetfrequency. NOT YET IMPLEMENTED

QHyst qHyst This parameter configures the hysteresis value of the serving cell used by the UE for ranking criteria in cell reselection.

Table 3: Cell Ranking Procedure parameters

The UE will perform ranking of all cells that fulfil the cell selection S criterion , which is defined in section 4.1.1.3.1.1,

The cells are be ranked according to the R criteria specified above, deriving Qmeas,n and Qmeas,s and calculating the R values using averaged RSRP results .

If a cell is ranked as the best cell the UE will perform cell re-selection to that cell .

In all cases, the UE will actually reselect the new cell, only if the following conditions are met :

- The new cell is better ranked than the serving cell during a time interval tReselectionEUTRANs or tReselectionRATs

Qmeas,s + QHyst < Qmeas,n QOffset


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- If the UE is in high mobility state multiply TreselectionEUTRAN or tReselectionRATs (and Qhyst FFS) by the IE "Speed dependent ScalingFactor for TreselectionEUTRANs or tReselectionRATs " if sent on system information and UE. (to see section 5.1.3.3)

- More than 1 second(s) has elapsed since the UE camped on the current serving cell.

qHyst : 3GPP 36.331[R08] This parameter configures the hysteresis value of the serving cell used by the UE for ranking criteria in cell reselection . Broadcast in SystemInformationBlockType3

CellSelectionReselectionConf:: qHyst

Parameter qHyst


Range & Unit Enumerate in dB

[dB0, dB1, dB2, dB3, dB4, dB5, dB6, dB8, dB10, dB12, dB14, dB16, dB18, dB20, dB22, dB24]

Class/Category C / Optimization - Selection

Value dB4 (Default:dB4)

Feature 96760,97933

This parameter is an environment dependent parameter. This parameter configures the hysteresis value of the serving cell used by the UE for ranking criteria in cell reselection. Current value is 4dB. According to this value, the cell-reselection should be made with a neighboring cell at RSRP > -86dBm (case with qRxLevMin (see by the UE) =-100 dBm, sIntraSearch=10, intra-frequency mobility ) Decreasing qHyst leads to do cell-reselection earlier Note: Value Q-hyst = IE; If qHyst =4 in DLU, in sysinfo UE see the value 4. 3GPP compliant.

Engineering Recommendation: qHyst

We can adjust qHyst according to the RSRP values seen on the field and this needs to be cell by cell basis. But the recommended value is dB4.


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tReselectionEUTRAN : 3GPP 36.331 This parameter specifies the value of the cell reselection UE timer in the serving cell . Broadcast in SystemInformationBlockType3

CellSelectionReselectionConf:: tReselectionEUTRAN

Parameter tReselectionEUTRAN


Range & Unit s

[0..7] step = 1


Value 2

Feature 96760,97933

This parameter avoids ping pong radio phenomena dur ing the RA-Update & idle mobility.

Increasing this value will lead the mobile to start cell-reselection later.

Warning: For an intra-frequency cell that has been already detected, but that has not been reselected to, the filtering will be such that the UE will be capable of evaluating that the intra-frequency cell has met reselection criterion defined in this section within Tevaluate,E-UTRAN_intra = 5,12 sec when tReselectionEUTRAN = 0 as specified in table below (with Enb::defaultPagingCycle=rf32 [Vol. 5]), provided that the cell is at least 3dB better ranked. [TS 36.133]

DRX cycle length [s]

Tdetect,EUTRAN_Intra [s] (number of DRX cycles)

Tmeasure,EUTRAN_Intra [s] (number of DRX cycles)

Tevaluate,E-UTRAN_intra [s] (number of DRX cycles)

0.32 [11.52 (36)] [1.28 (4)] [5.12 (16)] 0.64 [17.92 (28)] [1.28 (2)] [5.12 (8)] 1.28 [32(25)] [1.28 (1)] [6.4 (5)] 2.56 [58.88 (23)] [2.56 (1)] [7.68 (3)]

Table 4: Measurements of EUTRAN TDD cells selection [3GPP 36133].


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Figure 2 : Cell Reselection criteria intra-LTE

qOffsetCell : This parameter defines the offset between the current LteCell and the LteNeighbouringCell . This parameter shall be present and configured if the neighbour cell is included in the neighbour cell list to be provided in the System Information. In dB. Defined in TS 36.331. Broadcast in SystemInformationBlockType4. Not implemented in TLA2.1

LteNeighboringCellRelation:: qOffsetCell

Parameter qOffsetCell

Object Enb/ LteCell/ LteNeighboringCellRelation


[dB-24, dB-22, dB-20, dB-18, dB-16, dB-14, dB-12, dB-10, dB-8, dB-6, dB-5, dB-4, dB-3, dB-2, dB-1, dB0, dB1, dB2, dB3, dB4, dB5, dB6, dB8, dB10, dB12, dB14, dB16, dB18, dB20, dB22, dB24]


Value dB3

Feature 96760,81872,97933

t

Serving Cell

Cell 1

tReselectionEUTRAN

Cell 2

Cell2 is reselected

sIntraSearch

UE triggers intra-frequency measurements

RSRP

Timer is aborted

QHyst

Qoff

Cell2 becomes better than

the serving cell

Timer is started

Serving

Cell


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qR

qRxLevMinIntraFreqNeighbour: This parameter specifies the mininum required RSRP level used by the UE for the intra-frequency neighbouring E-UTRA cells. The value sent over the RRC interface is half the value configured (the UE then multiplies the received value by 2) Defined in TS36.331 and TS36.304. Broadcast in SystemInformationBlockType3

CellSelectionReselectionConf:: qRxLevMinIntraFreqNeighbour

Parameter qRxLevMinIntraFreqNeighbour


Range & Unit Integer in dBm

[-140..-44] step = 2


Value -110

Feature 96760

Note: The qRxLevMin to send by the SIB3 (in TLA2.1, it is the parameter qRxLevMinIntraFreqNeighbour) applies to the signal of the same neighbors frequency than the serving cell.

Engineering Recommendation: qRxLevMinIntraFreqNeighbour

The field tests trial have shown best results with the value : -110 dBm Follow the CellSelectionReselectionConf::qRxLevMin value at this moment.

4.1.1.3.3 UE SPEED MANAGEMENT

Parameters in relationship with mobility speed states of a UE, in case of intra-LTE mobility, are the same as in case of inter-RAT mobility, except parameters in the MO object UtraSpeedConf and tReselectionUtra, which are specific. Please report to section 5.1.3.3 or 6.1.2.3 for those parameters in case of inter-RAT mobility.

Besides Normal-mobility state a High-mobility and a Medium-mobility state are applicable if the parameters (tEvaluation (TCRmax), nCellChangeHigh (NCR_H), nCellChangeMedium (NCR_M) and tHystNormal (TCRmaxHyst)) are sent in the system information broadcast SIB3 of the serving cell.

State detection criteria:

Medium-mobility state criteria:

- If number of cell reselections during time period tEvaluation exceeds nCellChangeMedium and not exceeds nCellChangeHigh

Restriction: Regarding TLA2.1 and LteNeighboringCellRelation::qOffsetCell

Not implemented in TLA2.1, and the algorithm ignores this parameter.


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High-mobility state criteria:

- If number of cell reselections during time period tEvaluation exceeds nCellChangeHigh

The UE shall not count consecutive reselections between same two cells into mobility state detection criteria if same cell is reselected just after one other reselection.

State transitions:

The UE shall:

- if the criteria for High-mobility state is detected:

- enter High-mobility state.

- else if the criteria for Medium-mobility state is detected:

- enter Medium-mobility state.

- else if criteria for either Medium- or High-mobility sta te is not detected during time period tHystNormal:

- enter Normal-mobility state .

If the UE is in High- or Medium-mobility state, the UE shall apply the speed dependent scaling rules as defined in subclause [R14] section 5.2.4.3.1.

tEvaluation: TS36.331: this parameter contributes to the configuration of the SystemInformationBlockType3. This parameter configures the IE t-Evaluation included in the IE MobilityStateParameters. The duration for evaluating criteria to enter mobility states. Corresponds to TCRmax in TS 36.304. Value in seconds, s30 corresponds to 30 s and so on.

SpeedStateEvalBroadcastConf:: tEvaluation

Parameter tEvaluation

Object Enb/ LteCell/ SpeedDependentBroadcastConf/ SpeedStateEvalBroadcastConf

Range & Unit Enumerate in s

[s30, s60, s120, s180, s240]


Value N.A.

Feature 76498

Keys for Hierarchy: ENBEquipment Enb LteCell SpeedDependentBroadcastConf SpeedStateEvalBroadcastConf


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nCellChangeHigh: TS36.331: this parameter contributes to the configuration of the SystemInformationBlockType3. This parameter configures the IE n-CellChangeHigh included in the IE MobilityStateParameters. The number of cell changes to enter high mobility state. Corresponds to NCR_H in TS 36.304.

SpeedStateEvalBroadcastConf:: nCellChangeHigh

Parameter nCellChangeHigh


Range & Unit Integer

[1..16] step = 1


Value N.A

Feature 76498


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nCellChangeMedium: TS36.331: this parameter contributes to the configuration of the SystemInformationBlockType3. This parameter configures the IE n-CellChangeMedium included in the IE MobilityStateParameters. The number of cell changes to enter medium mobility state. Corresponds to NCR_M in TS 36.304.

SpeedStateEvalBroadcastConf:: nCellChangeMedium

Parameter nCellChangeMedium


Range & Unit Integer

[1..16] step = 1

Class/Category C / Optimization Tuning

Value N.A

Feature 76498

tHystNormal: TS36.331: this parameter contributes to the configuration of the SystemInformationBlockType3. This parameter configures the IE t-HystNormal included in the IE MobilityStateParameters. The additional duration for evaluating criteria to enter normal mobility state. Corresponds to TCRmaxHyst in TS 36.304. Value in seconds, s30 corresponds to 30 s and so on.

SpeedStateEvalBroadcastConf:: tHystNormal

Parameter tHystNormal


Range & Unit Enumerate in s

[s30, s60, s120, s180, s240]


Value N.A

Feature 76498

Scaling rules:

The cell ranking procedure is the same as in 4.1.1.3.2 but with variable values for parameters qHyst and tReselection . UE shall apply the following scaling rules:

- If neither Medium- nor Highmobility state is detected:

- no scaling is applied.

- If High-mobility state is detected:

- Add the qHystSfHigh to Qhyst (to see section 4.1.1.3.2) for high mobility state if sent on system information.

- For E-UTRAN cells multiply tReselectionEUTRAN (to see section 4.1.1.3.2) by tReselectionEutraSfHigh if sent on system information.

- For UTRAN cells multiply tReselectionUtra by tReselectionUtraSfHigh if sent on system information. (Please refer to section 5.1.3.3)


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- If Medium-mobility state is detected:

- Add qHystSfMedium to Qhyst (to see section 4.1.1.3.2) for medium mobility state, if sent on system information.

- For E-UTRAN cells multiply tReselectionEUTRAN (to see section 4.1.1.3.2) by tReselectionEutraSfMedium if sent on system information.

- For UTRAN cells multiply tReselectionUtra by tReselectionUtraSfMedium, if sent on system information. (Please refer to section 5.1.3.3)

In case scaling is applied to any TreselectionRAT parameter the UE shall round up the result after all scalings to the nearest second.

qHystSfHigh: TS36.331: this parameter contributes to the configuration of the IE SystemInformationBlockType3.This parameter configures the IE sf-High included in the IE SpeedStateReselectionPars. Parameter Speed dependent ScalingFactor for Qhyst in TS 36.304. The sf-High concerns the additional hysteresis to be applied, in High Mobility state , to Qhyst as defined in TS 36.304 and in 4.1.1.3.2. In dB. Value dB-6 corresponds to -6dB, dB-4 corresponds to -4dB and so on.

SpeedStateEvalBroadcastConf:: qHystSfHigh

Parameter qHystSfHigh



[dB-6, dB-4, dB-2, dB0]

Class/Category C / Optimization Selection

Value N.A

Feature 76498

This parameter is an environment dependent parameter. This parameter configures the hysteresis value of the serving cell used by the UE for ranking criteria in cell reselection. Exemple with the Value 4dB: With this value, the cell-reselection should be made with a neighboring cell at RSRP > -86dBm (case with qRxLevMin (see by the UE) =-100 dBm, sIntraSearch=10, intra-frequency mobility ) Decreasing qHystSfHigh leads to do cell-reselection earlier


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tReselectionEutraSfHigh : TS36.331: this parameter contributes to the configuration of the IE SystemInformationBlockType3. This parameter configures the t-ReselectionEUTRA-SF included in the IE SystemInformationBlockType3 and timeToTrigger-SF in IE MeasConfig. Parameter Speed dependent ScalingFactor for TReselectionEUTRA in TS 36.304. If the field is not present, the UE behaviour is specified in TS 36.304. The concerned mobility control related parameter is multiplied with this factor if the UE is in High Mobility state as defined in TS 36.304. Value oDot25 corresponds to 0.25, oDot5 corresponds to 0.5 , oDot75 corresponds to 0.75 and so on.

LteSpeedConf:: tReselectionEutraSfHigh

Parameter tReselectionEutraSfHigh

Object Enb/ LteCell/ SpeedDependentBroadcastConf/ LteSpeedConf

Range & Unit Enumerate

[oDot25, oDot5, oDot75, lDot0]

Class/Category C / Optimization Tuning

Value N.A

Feature 76498

This parameter avoid ping pong radio phenomena duri ng the RA-Update & idle mobility.

Increasing this value will lead the mobile to start cell-reselection later.


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qHystSfMedium: TS36.331: this parameter contributes to the configuration of the IE SystemInformationBlockType3.This parameter configures the IE sf-Medium included in the IE SpeedStateReselectionPars. Parameter Speed dependent ScalingFactor for Qhyst in TS 36.304. The sf-Medium concerns the additional hysteresis to be applied, in Medium Mobility state , to Qhyst as defined in TS 36.304 and in 4.1.1.3.2. In dB. Value dB-6 corresponds to -6dB, dB-4 corresponds to -4dB and so on.

SpeedStateEvalBroadcastConf:: qHystSfMedium

Parameter qHystSfMedium



[dB-6, dB-4, dB-2, dB0]

Class/Category C / Optimization - Selection

Value N.A

Feature 76498

This parameter is an environment dependent parameter. This parameter configures the hysteresis value of the serving cell used by the UE for ranking criteria in cell reselection. Exemple with the Value 4dB: With this value, the cell-reselection should be made with a neighboring cell at RSRP > -86dBm (case with qR

TLA2.1 LPUG 02.06 Volume 6 Mobility Approved Preliminary External

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