LTE Parameter Engineering Guidelines [PDF]

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Huawei LTE Engineering Guide for Operator X Huawei eRAN6 Huawei sRAN7/sRAN8 Huawei BSS14 Huawei RAN 14 3Gpp Rel.8 and above

Huawei Technologies

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Table of Contents 1 Cell Selection........................................................................................................................19 1.1 Cell Selection Criteria............................................................................................................19 1.1.1 Initial cell Selection.......................................................................................................................19 1.1.2 USIM information cell selection...................................................................................................19 1.1.3 RRC Connected mode to idle mode cell selection........................................................................19 1.1.4 Cell selection conditions................................................................................................................19 1.1.5 RF Conditions (“S” criteria)..........................................................................................................20

1.2 Huawei Parameters................................................................................................................20 1.2.1 3Gpp vs Huawei Parameters.........................................................................................................20 1.2.2 Specific parameters for the redirection..........................................................................................21

1.3 Network Current Parameter Values (Cell Selection)..............................................................22 1.3.1 RF conditions (“S” criteria) parameters........................................................................................22 1.3.2 Other related parameters................................................................................................................23

2 Cell Reselection....................................................................................................................25 2.1 Measurement Start Criteria....................................................................................................25 2.1.1 Intra-frequency Measurement.......................................................................................................25 2.1.1.1 RF Conditions (“S” criteria).............................................................................................25 2.1.1.2

3Gpp vs Huawei Parameters.............................................................................................26

2.1.2 Inter-frequency Measurement........................................................................................................26 2.1.2.1 RF Conditions (“S” criteria).............................................................................................26 2.1.2.2

3Gpp vs Huawei Parameters.............................................................................................27

2.1.3 Inter-RAT Measurement...............................................................................................................28 2.1.3.1 RF Conditions (“S” criteria).............................................................................................28 2.1.3.2

3Gpp vs Huawei Parameters.............................................................................................28

2.2 Measurement Start Criteria Current Network Values............................................................29 2.3 Cell Reselection Criterion......................................................................................................30 2.3.1 Priorities........................................................................................................................................30 2.3.2 Cell reselection and mobility.........................................................................................................32 2.3.2.1 Mobility type detection.....................................................................................................32 2.3.2.2

3Gpp vs Huawei Parameters.............................................................................................33

2.3.2.3

Mobility criterion (scaling rules) for EUTRAN...............................................................33

2.3.2.3.1

Hysteresis.....................................................................................................................................34

2.3.2.3.2

Evaluation Time...........................................................................................................................34

2.3.2.4

3Gpp vs Huawei Parameters.............................................................................................34

2.3.2.5

Mobility criterion (scaling rules) for GERAN and UTRAN............................................35

2.3.2.6

3Gpp vs Huawei Parameters.............................................................................................35

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2.3.2.7

Network Current Parameter Values (Cell Reselection - Mobility)..................................36

2.3.2.7.1

EUTRAN reselection parameter details.......................................................................................36

2.3.2.7.2

EUTRAN reselection current network value................................................................................36

2.3.2.7.3

GERAN reselection parameter details..........................................................................................38

2.3.2.7.4

GERAN reselection current network value..................................................................................38

2.3.2.7.5

UTRAN reselection parameter details..........................................................................................38

2.3.2.7.6

UTRAN reselection current network value..................................................................................38

2.3.3 Other reselection parameters.........................................................................................................39 2.3.4 Ranking (“R” criteria)...................................................................................................................39 2.3.4.1 Cell reselection ranking criteria (Intra-freq. and equal priority for inter-freq.)................39 2.3.4.1.1

Criteria.........................................................................................................................................39

2.3.4.1.2

3Gpp vs Huawei Parameters........................................................................................................40

2.3.4.1.3

Huawei Current Parameter Values...............................................................................................40

2.3.4.2

Cell reselection ranking criteria (Inter-RAT and different priority for inter-frequency). 41

2.3.4.2.1

Criteria.........................................................................................................................................41

2.3.4.2.2

3Gpp vs Huawei Parameters........................................................................................................44

2.3.4.2.3

Huawei Ranking Current Parameter Values.................................................................................46

2.3.4.3

Reselection Ranking parameter details.............................................................................48

2.4 Reselection Example..............................................................................................................49 2.5 Cell Reselection Summary (Rel. 8)........................................................................................52 2.5.1 L800 and L1800 layers..................................................................................................................52 2.5.2 L1800 layer only............................................................................................................................56 2.5.3 Intra-frequency reselection............................................................................................................58 2.5.4 Inter-frequency reselection............................................................................................................59

3 GSM/UMTS to LTE Cell Reselection..............................................................................60 3.1 GSM to LTE Cell Reselection...............................................................................................60 3.1.1 Cell Reselection feature configuration and activation...................................................................60 3.1.1.1 Priority Network Configuration........................................................................................60 3.1.1.2

Activation.........................................................................................................................60

3.1.1.3

Neigbour definition...........................................................................................................60

3.1.2 Triggering Conditions...................................................................................................................62 3.1.2.1 GERAN priority is lower than EUTRAN priority (GERANPRI < EUTRANPRI).........62 3.1.2.2

EUTRAN priority is lower than GERAN priority (GERANPRI > EUTRANPRI).........62

3.1.2.3

Network Current Parameter Values (GSM-LTE Cell Reselection).................................63

3.1.2.4

Other reselection parameters............................................................................................64

3.1.2.5

GSM-LTE reselection Parameter details..........................................................................64

3.1.3 Fast return to LTE (Fast LTE Reselection at 2G CS call release).................................................65 3.1.3.1 Feature activation..............................................................................................................65

3.2 UMTS to LTE Cell Reselection.............................................................................................66 No spreading without Permission of Huawei and Mobistar

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3.2.1 Cell Reselection feature configuration and activation...................................................................66 3.2.1.1 Priority Network Configuration........................................................................................66 3.2.1.2

Neigbour definition...........................................................................................................66

3.2.2 Measurement criterion...................................................................................................................66 3.2.2.1 RF Conditions (“S” criteria).............................................................................................66 3.2.2.2

3Gpp vs Huawei Parameters.............................................................................................67

3.2.2.3

Huawei current network Parameters.................................................................................67

3.2.2.4

Parameter details...............................................................................................................68

3.2.3 Triggering Conditions...................................................................................................................68 3.2.3.1 UTRAN priority is lower than EUTRAN priority (UTRANPRI < EUTRANPRI).........68 3.2.3.2

EUTRAN priority is lower than UTRAN priority (UTRANPRI > EUTRANPRI).........68

3.2.3.3

3Gpp vs Huawei Parameters.............................................................................................69

3.2.3.4

Huawei current network Parameters.................................................................................69

3.2.3.5

Parameter details...............................................................................................................70

3.2.3.6

Other parameters to consider............................................................................................70

3.2.4 Fast return to LTE (Fast LTE Reselection at 3G CS call release).................................................70 3.2.4.1 Feature Principle...............................................................................................................70 3.2.4.2

Feature Activation............................................................................................................72

3.2.4.2.1

Priorities.......................................................................................................................................72

3.2.4.2.2

Neighbour link definition.............................................................................................................72

3.2.4.2.3

Feature activation.........................................................................................................................72

3.2.4.2.4

Current network setting................................................................................................................72

3.2.4.2.5

Parameter details..........................................................................................................................72

4 Redirection............................................................................................................................74 5 CS Fallback............................................................................................................................75 5.1 Introduction...........................................................................................................................75 5.2 CSFB Mechanisms................................................................................................................75 5.2.1 Towards UTRAN mechanisms......................................................................................................75 5.2.2 Towards GERAN mechanisms......................................................................................................76

5.3 CSFB Basics..........................................................................................................................76 5.4 CSFB Triggering Phase.........................................................................................................77 5.4.1 Description....................................................................................................................................77 5.4.2 CSFB Triggering Parameters........................................................................................................78

5.5 CSFB Measurement Phase.....................................................................................................79 5.5.1 Description....................................................................................................................................79 5.5.2 3Gpp vs Huawei parameters..........................................................................................................80 5.5.3 Current network parameters..........................................................................................................81

5.6 CSFB Decision Phase............................................................................................................82 5.6.1 Description....................................................................................................................................82

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5.7 CSFB Execution Phase..........................................................................................................82 5.7.1 Description....................................................................................................................................82 5.7.1.1 Execution towards a GERAN cell....................................................................................83 5.7.1.2

Execution towards a GERAN cell....................................................................................83

5.7.2 Parameters.....................................................................................................................................84

5.8 Other parameters....................................................................................................................85 5.8.1 CSFB Huawei other parameters....................................................................................................85 5.8.2 Current Network Huawei other parameters...................................................................................85

5.9 Parameter details....................................................................................................................87

6 Handover...............................................................................................................................88 6.1 Technical Overview and Basic Concepts...............................................................................88 6.1.1 Handover overview (mobility generalities)...................................................................................88 6.1.2 Achitecture summary for mobility in EUTRAN...........................................................................89 6.1.3 Measurement for a Handover........................................................................................................89 6.1.3.1 Measurement Objects.......................................................................................................89 6.1.3.1.1

Target System..............................................................................................................................90

6.1.3.1.2

Target Frequency.........................................................................................................................90

6.1.3.1.3

Measurement Bandwidth and Frequency specific Offset..............................................................90

6.1.3.1.4

Target Cell...................................................................................................................................91

6.1.3.2

Reporting Configuration...................................................................................................91

6.1.3.2.1

Event Triggered Reporting...........................................................................................................91

6.1.3.2.2

Event Triggered Periodical Reporting..........................................................................................92

6.1.3.2.3

Hysteresis and Time-to-Trigger....................................................................................................92

6.1.3.2.4

Triggering Quantity and Reporting Quantity................................................................................93

6.1.3.3

Other parameters...............................................................................................................93

6.1.3.3.1

Filtering........................................................................................................................................93

6.1.3.3.2

Measurement Gap........................................................................................................................95

6.1.3.3.3

Cell Individual Offset (CIO)........................................................................................................96

6.1.4 Decision on a Handover................................................................................................................96 6.1.5 Execution of a Handover...............................................................................................................97 6.1.5.1 X2/S1 Adaptation for a Handover....................................................................................97 6.1.5.2

Data Forwarding...............................................................................................................98

6.1.5.3

RRC Connection Re-Establishment After a Handover Failure........................................99

6.1.6 Neighbor Relationship Management...........................................................................................100 6.1.7 UE Capability Configuration.......................................................................................................101 6.1.8 Redirection..................................................................................................................................101 6.1.8.1 Triggering Mechanism....................................................................................................101 6.1.8.2

Flash Redirection............................................................................................................102

6.1.8.3

Blind Redirection without Neighbouring cells defined..................................................103

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6.1.9 Blind Handovers..........................................................................................................................103 6.1.9.1 Description......................................................................................................................103 6.1.9.2

Blind handover Parameters.............................................................................................107

6.1.9.3

Blind handover parameter details...................................................................................108

6.2 Inter-RAT Handover Measurement, Decision, and Execution.............................................108 6.2.1 Measurement starting/stopping Phase.........................................................................................108 6.2.1.1 Coverage-based handover...............................................................................................108 6.2.1.1.1

Inter-RAT measurements triggered by event A2........................................................................109

6.2.1.1.2

Inter-RAT event A2 target-based setting....................................................................................111

6.2.1.1.3

Inter-RAT measuerements stopped by event A1........................................................................112

6.2.1.1.4

Blind-Handover triggered by event A2......................................................................................114

6.2.1.2

Load-based handover......................................................................................................115

6.2.1.3

Service-based handover..................................................................................................115

6.2.1.4

Uplink Quality based handover......................................................................................115

6.2.1.5

Distance based handover................................................................................................115

6.2.2 Measurement phase.....................................................................................................................115 6.2.2.1 Measurement configuration............................................................................................115 6.2.2.1.1

Inter-RAT measurement object..................................................................................................115

6.2.2.1.2

Measurement report configuration.............................................................................................116

6.2.2.1.3

Measurement quantities and filtering configuration...................................................................117

6.2.2.1.4

Measurement GAP configuration...............................................................................................118

6.2.2.2

Measurement priorities...................................................................................................118

6.2.2.3

Inter-RAT HO triggering................................................................................................118

6.2.2.3.1

Event B1 triggering....................................................................................................................118

6.2.2.3.2

Event B2 triggering....................................................................................................................123

6.2.3 Decision phase.............................................................................................................................123 6.2.4 Execution phase...........................................................................................................................124 6.2.4.1 Inter-RAT handover policy selection.............................................................................124 6.2.4.2

Retry and penalty............................................................................................................125

6.3 Inter-frequency (LTE800-LTE1800) Handover Measurement, Decision, and Execution......126 6.3.1 Measurement starting/stopping Phase.........................................................................................126 6.3.1.1 Coverage-based handover...............................................................................................126 6.3.1.1.1

Inter-frequency measurements triggered by event A2................................................................127

6.3.1.1.2

Inter-frequency event A2 target-based setting............................................................................129

6.3.1.1.3

Inter-frequency measuerements stopped by event A1................................................................129

6.3.1.1.4

Blind-Handover triggered by event A2......................................................................................132

6.3.1.2

Load-based handover......................................................................................................132

6.3.1.3

Service-based handover..................................................................................................132

6.3.1.4

Uplink Quality based handover......................................................................................132

6.3.1.5

Distance based handover................................................................................................132

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6.3.2 Measurement phase.....................................................................................................................132 6.3.2.1 Measurement configuration............................................................................................133 6.3.2.1.1

Measurement GAP configuration...............................................................................................134

6.3.2.2

Inter-frequency HO triggering........................................................................................134

6.3.2.2.1

Event A3 triggering....................................................................................................................135

6.3.2.2.2

Event A4 triggering....................................................................................................................136

6.3.2.2.3

Event A5 triggering....................................................................................................................139

6.3.3 Decision phase.............................................................................................................................139 6.3.4 Execution phase...........................................................................................................................139

6.4 Intra-frequency Handover Measurement, Decision, and Execution.....................................139 6.4.1 Measurement phase.....................................................................................................................140 6.4.1.1 Measurement configuration............................................................................................140 6.4.1.2

Event A3.........................................................................................................................141

6.4.2 Decision phase.............................................................................................................................144 6.4.3 Execution phase...........................................................................................................................144 6.4.3.1 Execution policy.............................................................................................................144 6.4.3.2

Retry and Penalty............................................................................................................145

7 SON features.......................................................................................................................146 7.1 ANR146 7.1.1 General overview.........................................................................................................................146 7.1.1.1 Feature overview............................................................................................................146 7.1.1.2

Concept...........................................................................................................................146

7.1.1.2.1

Neighbour Cell List concept (NCL)...........................................................................................146

7.1.1.2.2

Neighbour Relation Table concept (NRT)..................................................................................146

7.1.1.2.3

Blacklists concept.......................................................................................................................147

7.1.1.2.4

Whitelists concept......................................................................................................................147

7.1.2 Intra-RAT ANR...........................................................................................................................147 7.1.2.1 Activation.......................................................................................................................147 7.1.2.2

Detecting missing neighbours by event triggered..........................................................148

7.1.2.2.1

Procedure description.................................................................................................................149

7.1.2.3

Detecting missing neighbours by using UE history information....................................150

7.1.2.3.1

Procedure description.................................................................................................................150

7.1.2.4

Automatic maintenance of NCL’s and NRT’s...............................................................150

7.1.2.4.1

Automatic Maintenance of NCL’s..............................................................................................152

7.1.2.4.2

Automatic Maintenance of NRT’s..............................................................................................153

7.1.3 Inter-RAT ANR...........................................................................................................................154 7.1.4 FAST ANR..................................................................................................................................154

7.2 PCI Conflict detection/optimization.....................................................................................154 7.2.1 Introduction.................................................................................................................................154 7.2.2 PCI Conflict Detection................................................................................................................155 No spreading without Permission of Huawei and Mobistar

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7.2.2.1

PCI Conflict Types.........................................................................................................155

7.2.2.2

PCI Collision..................................................................................................................155

7.2.2.3

PCI Confusion................................................................................................................155

7.2.2.3.1

PCI Confusion when the Detected Cell Is a Configured Neighboring Cell.................................156

7.2.2.3.2

PCI Confusion when the Detected Cell Is Not a Configured Neighboring Cell..........................156

7.2.2.4

PCI Conflict Detection Methods....................................................................................157

7.2.3 PCI Self Optimization.................................................................................................................158 7.2.3.1 Overview.........................................................................................................................158 7.2.3.2

First-Order Neighboring Cell.........................................................................................158

7.2.3.3

Second-Order Neighboring Cell.....................................................................................158

7.2.4 PCI Re-assignment......................................................................................................................158 7.2.5 Parameters...................................................................................................................................159 7.2.6 Parameter details.........................................................................................................................159 7.2.7 Parameter current network values...............................................................................................159

8 Inter-Cell Interference Coordination (ICIC)................................................................160 8.1 Overview.............................................................................................................................160 8.2 Principles.............................................................................................................................160 8.2.1 CEU/CCU Identification.............................................................................................................161 8.2.1.1 Principles........................................................................................................................161 8.2.1.2

ICIC Event A3 and Event A6.........................................................................................161

8.2.2 Edge Band Mode Assignment.....................................................................................................162 8.2.3 Edge Band Adjustment................................................................................................................163

8.3 Parameters...........................................................................................................................164 8.4 Parameter details..................................................................................................................166 8.5 Downlink Inter-Cell Interference Coordination (DL ICIC)..................................................166 8.5.1 Static DL ICIC.............................................................................................................................166 8.5.2 Dynamic DL ICIC.......................................................................................................................166 8.5.3 Parameters...................................................................................................................................167 8.5.4 Parameter details.........................................................................................................................168

8.6 Uplink Inter-Cell Interference Coordination (UL ICIC)......................................................168 The preceding features address only frequency-domain UL ICIC.............................................168 8.6.1 Static UL ICIC.............................................................................................................................168 8.6.2 Dynamic UL ICIC.......................................................................................................................168 8.6.3 Parameters...................................................................................................................................169 8.6.4 Parameter details.........................................................................................................................169

9 Uplink Coordinated Multi Points (UL CoMP).............................................................170 9.1 Overview.............................................................................................................................170 9.2 Scenarios..............................................................................................................................170 9.2.1 Scenario 1....................................................................................................................................170 No spreading without Permission of Huawei and Mobistar

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9.2.2 Scenario 2....................................................................................................................................170

9.3 Benefits................................................................................................................................171 9.3.1 Performance Gains......................................................................................................................171 9.3.2 Capacity Gains.............................................................................................................................171

9.4 Basic UL CoMP Process......................................................................................................172 9.5 Selecting CoMP UEs and Coordinating Cells......................................................................172 9.5.1 Selecting a CoMP UE..................................................................................................................172 9.5.2 Selecting a Type-1 CoMP UE and a Coordinating Cell..............................................................173 9.5.3 Selecting a Type-2 CoMP UE and a Coordinating Cell..............................................................174

9.6 Using Antennas of Multiple Cells for Joint Reception.........................................................174 9.7 Parameters...........................................................................................................................174 9.7.1 Parameters...................................................................................................................................174 9.7.2 Parameters current values............................................................................................................174

10

Appendices.............................................................................................................176 10.1

Appendix 1: Cell Selection and Cell Reselection........................................................176

10.1.1

Cell Selection and Cell Reselection states and procedures....................................................176

10.1.2 System Information Block.....................................................................................................177 10.1.2.1 System information Block 1.........................................................................................177 10.1.2.2

System information Block 3.........................................................................................178

10.1.2.3

System information Block 4.........................................................................................179

10.1.2.4

System information Block 5.........................................................................................180

10.1.2.5

System information Block 6.........................................................................................181

10.1.2.6

System information Block 7.........................................................................................182

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List of Figures Figure 1-1: UE Capability.............................................................................................................................................22 Figure 2-1: Reselection example..................................................................................................................................49 Figure 2-2: Reselection example..................................................................................................................................50 Figure 2-3: Reselection example..................................................................................................................................51 Figure 2-4: L800 and L1800 layers non-colocated.......................................................................................................52 Figure 2-5: L800 and L1800 layers colocated..............................................................................................................53 Figure 2-6: L800 layer non-colocated...........................................................................................................................54 Figure 2-7: L800 layer colocated..................................................................................................................................55 Figure 2-8: L1800 layers non-colocated.......................................................................................................................56 Figure 2-9: L1800 layers colocated..............................................................................................................................57 Figure 2-10: L800 and L1800 intra-frequency.............................................................................................................58 Figure 2-11: L800 and L1800 inter-frequency.............................................................................................................59 Figure 3-1: Fast LTE Reselection at 2G CS call release - message flow.....................................................................65 Figure 5-1: CSFB - Basic Process................................................................................................................................77 Figure 5-2: CSFB Triggering phase - selecting frequencies to measure or selecting a target cell..............................78 Figure 5-3: CSFB - Event B1........................................................................................................................................80 Figure 5-4: CSFB Execution phase - Procedure for executing CSFB to GERAN.......................................................83 Figure 5-5: CSFB Execution phase - Procedure for executing CSFB to UTRAN.......................................................84 Figure 6-1: Handover – EUTRAN mobility global picture..........................................................................................88 Figure 6-2: Handover – architecture summary for mobility in EUTRAN....................................................................89 Figure 6-3: Handover – L3 Filtering.............................................................................................................................93 Figure 6-4: Handover – Measurement GAP.................................................................................................................96 Figure 6-5: Handover – X2/S1 Adaptation – Architecture view..................................................................................98 Figure 6-6: Successful RRC connection re-establishment procedure...........................................................................99 Figure 6-7: Failed RRC connection re-establishment procedure................................................................................100 Figure 6-8: Handover – Blind handover selection procedure.....................................................................................105 Figure 6-9: Handover – Inter-RAT measurement - Event A2....................................................................................110 Figure 6-10: Inter-RAT measurement - Event A1.....................................................................................................113 Figure 6-11: Handover – Inter-RAT measurement parameter 4.................................................................................113 Figure 6-12: Inter-RAT measurement - Event B1......................................................................................................120 Figure 6-13: HO policy selection................................................................................................................................125 Figure 6-14: Handover – Inter-RAT measurement - Event A2..................................................................................128 Figure 6-15: Inter-frequency measurement - Event A1..............................................................................................131 Figure 6-16: Handover – Event A4 triggering mechanism.........................................................................................137 Figure 6-17: Handover – Event A3 mechanism.........................................................................................................142 Figure 7-1: SON - ANR classification........................................................................................................................146 Figure 7-2: SON - ANR – Event triggered Procedure (UE measurement).................................................................149 Figure 7-3: SON - ANR – UE history information Procedure...................................................................................150 Figure 7-4: SON – PCI Collision................................................................................................................................155 Figure 7-5: SON – PCI Confusion (configured neighbour)........................................................................................156 Figure 7-6: SON – PCI Confusion (not configured neighbour).................................................................................157 Figure 8-1: ICIC – Principle - Techniques.................................................................................................................160 Figure 8-2: ICIC – Edge Band Modes for tri-sector site (eNodeB)............................................................................163 Figure 8-3: ICIC – Edge Band Adjustment example..................................................................................................164 Figure 9-1: UL CoMP – Scenario 1............................................................................................................................170 Figure 9-2: UL CoMP – Scenario 2............................................................................................................................171 Figure 9-3: UL-CoMP - Basic Process.......................................................................................................................172 Figure 9-4: UL CoMP – Tri-sector site RSRP............................................................................................................173 Figure 10-1: 3Gpp TS 36.304 RRC Idle cell selection and reselection states and procedures...................................176

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List of Tables Table 1-1: 3Gpp “S” Criteria........................................................................................................................................20 Table 1-2: “S” criteria Huawei Parameters...................................................................................................................20 Table 1-3: “S” criteria current values...........................................................................................................................23 Table 1-4: Other Huawei related parameters................................................................................................................24 Table 2-1: 3Gpp criteria................................................................................................................................................26 Table 2-2: “S” criteria Huawei Parameters (intra – frequency)....................................................................................26 Table 2-3: 3Gpp criteria................................................................................................................................................27 Table 2-4: “S” criteria Huawei Parameters (inter – frequency)....................................................................................27 Table 2-5: 3Gpp “S” criteria.........................................................................................................................................28 Table 2-6:“S” criteria Huawei Parameters (inter – RAT).............................................................................................29 Table 2-7: Measurement triggering current Huawei parameter values........................................................................30 Table 2-8: Current Network Priorities..........................................................................................................................31 Table 2-9: Priorities broadcast SIB...............................................................................................................................31 Table 2-10: Timer values..............................................................................................................................................32 Table 2-11: 3Gpp Mobility state parameters................................................................................................................33 Table 2-12: Mobility State 3Gpp vs Huawei parameters..............................................................................................33 Table 2-13: 3Gpp Scaling rules for Qhyst parameters (EUTRAN).................................................................................34 Table 2-14: 3Gpp Scaling rules for Treselection parameters (EUTRAN)...........................................................................34 Table 2-15: Scaling rules for Qhyst Huawei parameters (EUTRAN).............................................................................34 Table 2-16: Scaling rules for Treselection Huawei parameters (EUTRAN intra-frequency).............................................35 Table 2-17: Scaling rules for Treselection Huawei parameters (EUTRAN inter-frequency).............................................35 Table 2-18: 3Gpp Scaling rules for TreselectionGERA parameters (GERAN).......................................................................35 Table 2-19: 3Gpp Scaling rules for TreselectionUTRA parameters (UTRAN).......................................................................35 Table 2-20: Scaling rules for TreselectionGERA Huawei parameters (GERAN)...................................................................36 Table 2-21: Scaling rules for TreselectionUTRA Huawei parameters (UTRAN)...................................................................36 Table 2-22: Reselection EUTRAN current Huawei parameter values.........................................................................37 Table 2-23: Reselection GERAN current Huawei parameter values............................................................................38 Table 2-24: Reselection UTRAN current Huawei parameter values............................................................................38 Table 2-25: Other Huawei reselection parameters........................................................................................................39 Table 2-26: “R” criteria offset Huawei parameters (EUTRAN)..................................................................................40 Table 2-27: “R” criteria offset parameter current values (EUTRAN)..........................................................................41 Table 2-28: 3Gpp Ranking Parameters.........................................................................................................................43 Table 2-29: 3Gpp vs Huawei Ranking GERAN Parameters........................................................................................44 Table 2-30: Other Huawei Ranking GERAN Parameters............................................................................................44 Table 2-31: 3Gpp vs Huawei Ranking UTRAN Parameters........................................................................................44 Table 2-32: Other Huawei Ranking UTRAN Parameters............................................................................................45 Table 2-33: 3Gpp vs Huawei Ranking EUTRAN Parameters......................................................................................45 Table 2-34: Other Huawei Ranking EUTRAN (inter-frequency) Parameters..............................................................45 Table 2-35: Ranking parameter current value (GERAN).............................................................................................46 Table 2-36: Ranking parameter current value (UTRAN, U2100)................................................................................46 Table 2-37: Ranking parameter current value (UTRAN, U900)..................................................................................47 Table 2-38: Ranking parameter current value (EUTRAN, L800)................................................................................47 Table 2-39: Ranking parameter current value (EUTRAN, L1800)..............................................................................48 Table 3-1: GSM to LTE Cell Reselection Huawei Priority Parameters.......................................................................60 Table 3-2: : GSM to LTE Cell Reselection Huawei Activation Parameters................................................................60 Table 3-3: GSM to LTE Cell Reselection - neighbours definition (GLTENCELL)....................................................61 Table 3-4: GSM to LTE Cell Reselection - neighbours definition (GEXTLTECELL)...............................................61 Table 3-5: GSM to LTE Cell Reselection – current parameter values.........................................................................64 Table 3-6: GSM to LTE Cell Reselection – other parameters......................................................................................64 Table 3-7: Fast LTE Reselection at 2G CS call release - neighbours definition (GLTENCELL)...............................65 No spreading without Permission of Huawei and Mobistar

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Table 3-8: UMTS to LTE Cell Reselection - Huawei Priority Parameters..................................................................66 Table 3-9: UMTS to LTE Cell Reselection - 3Gpp criteria..........................................................................................67 Table 3-10: UMTS to LTE Cell Reselection - “S” criteria Huawei Parameters..........................................................67 Table 3-11: UMTS to LTE Cell Reselection - “S” criteria Huawei Parameters curent network values......................67 Table 3-12: UMTS to LTE Cell Reselection - 3Gpp criteria.......................................................................................69 Table 3-13: UMTS to LTE Cell Reselection - triggering criteria Huawei Parameters................................................69 Table 3-14: UMTS to LTE Cell Reselection - triggering criterion Huawei Parameters curent network values.........70 Table 3-15: : UMTS to LTE Cell Reselection – Other parameters..............................................................................70 Table 3-16: Fast Return to LTE – Absolute Priorities..................................................................................................72 Table 3-17: Fast Return to LTE – NB frequenccy parameters.....................................................................................72 Table 5-1: CSFB Towards UTRAN Mechanisms........................................................................................................75 Table 5-2: CSFB Towards GERAN Mechanisms........................................................................................................76 Table 5-3: CSFB triggering phase - parameters...........................................................................................................78 Table 5-4: CSFB measurement phase - 3Gpp vs Huawei Parameters..........................................................................81 Table 5-5: CSFB execution phase - parameters............................................................................................................84 Table 5-6: CSFB – Other parameters............................................................................................................................85 Table 5-7: CSFB – Other parameters values................................................................................................................86 Table 6-1: Handover – Target Frequency Priorities parameters...................................................................................90 Table 6-2: Handover – Measurement bandwidth and offset parameters......................................................................91 Table 6-3: Handover – L3 Filtering parameters...........................................................................................................94 Table 6-4: Handover – L3 Filtering parameters values................................................................................................95 Table 6-5: Handover – Measurement Gap Pattern parameter......................................................................................96 Table 6-6: Handover – Neighbor management priority..............................................................................................101 Table 6-7: Handover – blind handover parameters.....................................................................................................107 Table 6-8: Handover – Inter-RAT measurement parameter 1....................................................................................108 Table 6-9: Handover – Inter-RAT measurement parameter 2....................................................................................110 Table 6-10: Handover – Inter-RAT measurement parameter 2 current values..........................................................111 Table 6-11: Handover – Inter-RAT measurement parameter 3..................................................................................112 Table 6-12: Handover – Inter-RAT measurement parameter 4 current values..........................................................114 Table 6-13: Handover – Inter-RAT measurement parameter 5..................................................................................115 Table 6-14: Handover – Inter-RAT measurement parameter 5 values.......................................................................116 Table 6-15: Handover – Inter-RAT measurement parameter 6..................................................................................116 Table 6-16: Handover – Inter-RAT measurement parameter 6 values.......................................................................117 Table 6-17: Handover – categorized event B1 quantities and parameter thresholds..................................................120 Table 6-18: Handover – Event B1 parameters............................................................................................................121 Table 6-19: Handover – Event B1 parameters values................................................................................................122 Table 6-20: Handover – event B2 threshold parameters............................................................................................123 Table 6-21: Handover – event B2 threshold parameters values.................................................................................123 Table 6-22: Handover – Inter-frequency measurement parameter 1..........................................................................126 Table 6-23: Handover – Inter-frequency measurement parameter 2..........................................................................128 Table 6-24: Handover – Inter-frequency measurement parameter 2 values...............................................................129 Table 6-25: Handover – inter-frequency event A1 parameters..................................................................................131 Table 6-26: Handover – inter-frequency event A1 parameters values.......................................................................132 Table 6-27: Handover – inter-frequency measurement config parameters................................................................133 Table 6-28: Handover – inter-frequency measurement config parameters values.....................................................134 Table 6-29: Handover – inter-frequency handover triggering parameters 1..............................................................135 Table 6-30: Handover – inter-frequency handover triggering parameters 1 values...................................................135 Table 6-31: Handover – inter-frequency handover triggering event A3 specific parameters....................................135 Table 6-32: Handover – inter-frequency handover triggering event A3 specific parameters values.........................136 Table 6-33: Handover – inter-frequency event A4 parameters..................................................................................138 Table 6-34: Handover – inter-frequency event A4 parameters values.......................................................................138 Table 6-35: Handover – intra-frequency parameter 1.................................................................................................140 Table 6-36: Handover – intra-frequency event A3 parameters values.......................................................................143 Table 6-37: Handover – intra-frequency event A3 parameters values.......................................................................144 Table 7-1: SON - ANR – Activation parameter.........................................................................................................148 Table 7-2: SON - ANR – NCL and NRT automatic maintenace parameters.............................................................151 No spreading without Permission of Huawei and Mobistar

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Table 7-3: SON - ANR – NCL parameters.................................................................................................................152 Table 7-4: SON - ANR – NCL parameters.................................................................................................................154 Table 7-5: SON – PCI conflict detection / optimization parameters..........................................................................159 Table 8-1: ICIC - Parameters......................................................................................................................................164 Table 8-2: ICIC – Parameters current values..............................................................................................................165 Table 8-3: ICIC – DL ICIC Parameters......................................................................................................................167 Table 8-4: ICIC – DL ICIC Parameters network current value..................................................................................167 Table 8-5: ICIC – UL ICIC Parameters......................................................................................................................169 Table 8-6: ICIC – UL ICIC Parameters network current value..................................................................................169 Table 9-1: UL-CoMP - parameter...............................................................................................................................174 Table 9-2: UL-CoMP – parameter values...................................................................................................................174 Table 10-1: 3Gpp TS 36.331 System information block 1 description......................................................................177 Table 10-2: 3Gpp TS 36.331 System information block 3 description......................................................................179 Table 10-3: 3Gpp TS 36.331 System information block 4 description......................................................................180 Table 10-4: 3Gpp TS 36.331 System information block 5 description......................................................................181 Table 10-5: 3Gpp TS 36.331 System information block 6 description......................................................................182 Table 10-6: 3Gpp TS 36.331 System information block 7 description......................................................................183

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Revision History Version 1.0 1.0

Release 1.0 2.0

Date 21/02/2014 26/02/2014

Updated by Dominique Cooreman Dominique Cooreman

1.0

3.0

04/03/2014

Dominique Cooreman

Update Description Initial version Add PCI Conflict detection/optimization Add ICIC Inter-Cell Interference Coordination

Note: at the time of releasing this document (initial version), the Mobistar network was running eRAN3, BSS/RAN14, and sRAN7.

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1

Cell Selection

1.1

Cell Selection Criteria

There are three types of cell selection: -

initial cell selection cell selection based on what is recorded in the USIM cell selection after leaving the RRC connected mode, so move back to idle mode

The cell selection is specified by the 3Gpp TS 36.304. 1.1.1

Initial cell Selection

Before the initial cell selection, a PLMN selection is needed. The initial cell selection is made by the UE, it is simply scanning the RF carries for a suitable cell, when the UE is synchronized with the control channels, the UE will be camping on that cell. 1.1.2

USIM information cell selection

In order to help, or speed-up the cell selection, the UE can store information in the USIM and re-use this information later when the UE is switch on. For example the last used RF carrier when the UE is switch off. If this information cannot be used, or is irrelevant (i.e. the UE is in another location), the initial cell selection procedure will be used instead. 1.1.3

RRC Connected mode to idle mode cell selection

On transition from RRC_CONNECTED to RRC_IDLE, UE shall attempt to camp on a suitable cell according to redirectedCarrierInfo, if included in the RRCConnectionRelease message. If the UE cannot find a suitable cell, the UE is allowed to camp on any suitable cell of the indicated RAT. If the RRCConnectionRelease message does not contain the redirectedCarrierInfo UE shall attempt to select a suitable cell on an EUTRAN carrier. If no suitable cell is found according to the above, the UE shall perform a cell selection starting with Stored Information Cell Selection procedure in order to find a suitable cell to camp on. When returning to RRC_IDLE after UE moved to RRC_CONNECTED state from camped on any cell state, UE shall attempt to camp on an acceptable cell according to redirectedCarrierInfo, if included in the RRCConnectionRelease message. If the UE cannot find an acceptable cell, the UE is allowed to camp on any acceptable cell of the indicated RAT. If the RRCConnectionRelease message does not contain redirectedCarrierInfo UE shall attempt to select an acceptable cell on an EUTRAN carrier. If no acceptable cell is found according to the above, the UE shall continue to search for an acceptable cell of any PLMN in state any cell selection. 1.1.4

Cell selection conditions

The following cells cannot be selected: -

barred cells it must belongs to the registered PLMN not allowed TA (Tracking area) do not satisfies with the RF conditions

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1.1.5

RF Conditions (“S” criteria)

These RF criterion are defined in the 3Gpp specifications ( since Rel.9). These conditions are applied for all three types of cell selection. These parameters are broadcasted on the system information block 1 (SIB1). The SIB1 can be find in the appendices. SRxLev > 0 SQual > 0 where: Srxlev = Qrxlevmeas – (Qrxlevmin + Qrxlevminoffset) – Pcompensation Squal = Qqualmeas – (Qqualmin + Qqualminoffset)

where: Table 1-1: 3Gpp “S” Criteria Parameter Srxlev Squal Qrxlevmeas Qqualmeas Qrxlevmin Qqualmin Qrxlevminoffset

Description Cell selection RX level value (dB) Cell selection quality value (dB) Measured cell RX level value (RSRP) Measured cell quality value (RSRQ) Minimum required RX level in the cell (dBm) Minimum required quality level in the cell (dB) 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]

Qqualminoffset

Offset to the signalled Qqualmin taken into account in the Squal evaluation as a result of a periodic search for a higher priority PLMN while camped normally in a VPLMN [5] max(PEMAX –PPowerClass, 0) (dB) Maximum TX power level an UE may use when transmitting on the uplink in the cell (dBm) defined as PEMAX in [TS 36.101] Maximum RF output power of the UE (dBm) according to the UE power class as defined in [TS 36.101]

Pcompensation PEMAX PPowerClass

Note: Squal exists only since Rel.9. 1.2 1.2.1

Huawei Parameters 3Gpp vs Huawei Parameters Table 1-2: “S” criteria Huawei Parameters

3Gpp Name Qrxlevmin Qqualmin Qrxlevminoffset Qqualminoffset PEMAX

Huawei Parameter ID QRxLevMin QQualMin QRxLevMinOffset QQualMinOffsetCfgInd QQualMinOffset UePowerMaxCfgInd UePowerMax

Huawei Parameter Name Minimum required RX level Minimum required RX quality level Minimum required RX level offset Minimum required RX quality level offset configure indicator Minimum required RX quality level offset Ue max power allowed configure indicator Minimum required RX level

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Table Cellsel Cellsel Cellsel Cellsel Cellsel Cell Cell

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Parameter details:

Huawei Parameter cell selection details.xlsx 1.2.2

Specific parameters for the redirection

Regarding the third cell selection case, on transition from RRC_CONNECTED to RRC_IDLE, this is also called “redirection”. In Huawei, there is the possibility to allow HO, redirection, or both. Redirection is a method of transferring UEs between cells and is a type of handover when "handover" is used as a generic term. When a handover cannot be performed in an emergency or due to equipment limitations, the eNodeB sends the UE an RRC Connection Release message, which contains information about a neighboring frequency in the LTE system or in another RAT system. Using this message, the eNodeB instructs the UE to initiate a random access procedure towards an inter-frequency or inter-RAT neighboring cell so that the UE can resume its services. Compared with handovers, redirections do not include a procedure for initiating a handover request towards a neighboring cell and therefore have lower requirements for equipment capabilities and require less time. The two methods differ in the way to transfer UEs. Redirections are triggered if a device in the network or the UE involved does not support inter-frequency or interRAT handovers. If both the network and UE support inter-frequency or inter-RAT handovers, handovers are recommended. The UTRAN, and GERAN network are often mature, and may not support inter-RAT handovers from the EUTRAN. In this situation, redirections instead of inter-RAT handovers can be performed on UEs. Therefore, network capabilities must be collected to determine whether to enable handovers or redirections for UE transfer. To enable handovers or redirections, turn on the corresponding switch under the ENodeBAlgoSwitch.HoModeSwitch parameter. If both handovers and redirections are enabled, the eNodeB preferentially uses handovers to transfer UEs. During an inter-RAT handover, if the eNodeB determines that the UE does not support inter-RAT measurements or handovers based on the results of a UE capability inquiry procedure, the eNodeB sends an RRC Connection Release message to the UE to perform a redirection. This message contains information about the target frequency for the redirection. The eNodeB determines whether the UE is capable of inter-RAT measurements and handovers in an adaptive manner, without requiring user configuration. Figure 1 shows the UE capability inquiry procedure. For details, refer to 3GPP TS 36.331 Release 10.

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Figure 1-1: UE Capability

In the UE Capability Information message reported by the UE, the featureGroupIndicators IE (Information Element) indicates whether the UE is capable of frequency-specific or RAT-specific measurements and handovers. For details about this IE, refer to the 3GPP TS 36.331 Release 10. If an SPID (subscriber profile ID) is configured for a UE in the EPC or the eNodeB is configured with dedicated frequency priorities, the eNodeB may deliver a dedicated priority in the idleModeMobilityControlInfo IE of the command for a redirection. For details about the principles and configuration of SPIDs, see Flexible User Steering Feature Parameter Description (this is not used here but exists). For details about dedicated priority configuration for UEs in idle mode, see Idle Mode Management Feature Parameter Description. In an inter-frequency handover, if the UE does not support inter-frequency or inter-RAT measurements, the eNodeB performs a blind handover or a blind redirection to transfer the UE to a neighboring cell. Please refer to Blind Handover topic further in this document for details. The eNodeB supports flash redirections to UTRAN and GERAN. The flash redirection function is controlled by the ENodeBAlgoSwitch.RedirectSwitch parameter. If a switch under the ENodeBAlgoSwitch.RedirectSwitch parameter is turned on, the eNodeB includes the system information of the target cell in the redirection command. This enables the UE to access the target cell sooner because the UE does not need to read the system information. During a flash redirection procedure, the eNodeB uses the RAN information management (RIM) procedure to acquire system information of the target cell. To use RIM, ensure that the devices in the core network and target RAN also support the RIM procedure. For details about RIM, see CS Fallback Feature further in this document. Note that only UEs compliant with Release 9 and later releases support the flash redirection function.

1.3 1.3.1

Network Current Parameter Values (Cell Selection) RF conditions (“S” criteria) parameters

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Table 1-3: “S” criteria current values

Huawei Parameter ID QRxLevMin

Minimum required RX level

QQualMin

Minimum required RX quality level Minimum required RX level offset Minimum required RX quality level offset configure indicator Minimum required RX quality level offset Ue max power allowed configure indicator Max transmit power allowed(dBm)

QRxLevMinOffset QQualMinOffsetCfgI nd QQualMinOffset UePowerMaxCfgInd UePowerMax

Single

Huawei Parameter Name

L800 -64 (-128 dBm) -18 (-18 dB)

Dual

0 (0 dB)

L1800 -64 (-128 dBm) -18 (-18 dB) 0 (0 dB)

L800 -64 (-128 dBm) -18 (-18 dB) 0 (0 dB)

L1800 -64 (-128 dBm) -18 (-18 dB) 0 (0 dB)

NOT_CFG

NOT_CFG

NOT_CF G

NOT_CF G

NOT_CFG

NOT_CFG

UE Capable Power

UE Capable Power

NOT_CF G UE Capable Power

NOT_CF G UE Capable Power

At the moment, an LTE cell becomes selectable as soon as the RSRP is equal or above -128 dBm. The RSRQ criteria is only used for UE with Rel.9 or above, UE power is the capable power of the UE (no limitations). 1.3.2

Other related parameters

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Table 1-4: Other Huawei related parameters Huawei Parameter ID HoAlgoSwitch

Huawei Parameter Name Handover Algo switch

HoModeSwitch

Handover Mode switch

RedirectSwitch

Redirection switch

RimSwitch

RIM switch

Current GUI Values IntraFreqCoverHoSwitch-1 &InterFreqCoverHoSwitch-1 &UtranCsfbSwitch-1 &GeranCsfbSwitch-1 &Cdma1xRttCsfbSwitch-0 &UtranServiceHoSwitch-0 &GeranServiceHoSwitch-0 &CdmaHrpdServiceHoSwitch-0 &Cdma1xRttServiceHoSwitch-0 &UlQualityInterRATHoSwitch-0 &InterPlmnHoSwitch-0 &UtranFlashCsfbSwitch-0 &GeranFlashCsfbSwitch-0 &ServiceBasedInterFreqHoSwitch-0 &UlQualityInterFreqHoSwitch-0 EutranVoipCapSwitch-0 &UtranVoipCapSwitch-0 &GeranVoipCapSwitch-0 &Cdma1xRttVoipCapSwitch-0 &UtranPsHoSwitch-0 &GeranPsHoSwitch-0 &CdmaHrpdNonOtpimisedHoSwitch-0 &CdmaHrpdOptimisedHoSwitch-0 &GeranNaccSwitch-0 &GeranCcoSwitch-0 &UtranSrvccSwitch-0 &GeranSrvccSwitch-0 &Cdma1xRttSrvccSwitch-0 &UtranRedirectSwitch-1 &GeranRedirectSwitch-1 &CdmaHrpdRedirectSwitch-0 &Cdma1xRttRedirectSwitch-0 &BlindHoSwitch-0 LoadBasedSwitch-0 &GeranFlashRedirectSwitch-0 &UranFlashRedirectSwitch-0 UTRAN_RIM_SWITCH-0 &GERAN_RIM_SWITCH-0

Table ENodeBAlgoSwitch

ENodeBAlgoSwitch

ENodeBAlgoSwitch ENodeBAlgoSwitch

This means that redirection is activated, but not the flash redirection. CSFB is also active (see chapter 5 for CSFB).

Huawei Parameter details:

Huawei Parameter cell redirection details.xlsx

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2

Cell Reselection

This chapter will present the reselection between LTE cells, inclusive multi band reselection. The operator is indeed using two different carriers L800 and L1800. Mainly two criterion are considerred: priorities and measurements (RF conditions). Later other technologies will be considered in chapter 3. Again, as for the cell selection, some additional criterion have been added since Rel. 9.These are relative to RSRQ and a new search reference level (“SintraSearchP”). When activated, these parameters are all broadcasted on the System Information Block 3 (SIB3). Please refer to the appendices for the system information block 3 details. The cell reselection is specified by the 3Gpp TS 36.304 and TS 36.331

2.1

Measurement Start Criteria

Reselection measurement criterion are based on parameters broadcasted by the serving cell (where the UE is camping on), and not from the neighbours. These measurements start only when necessary to avoid unecessary signalling and so save UE battery live. 2.1.1 2.1.1.1

Intra-frequency Measurement RF Conditions (“S” criteria)

Rel. 8 and before Srxlev < Sintrasearch Since Rel. 9 Srxlev < SintrasearchP or Squal < SintrasearchQ

where, Srxlev = Qrxlevmeas – Qrxlevmin – Pcompensation Squal = Qqualmeas – Qqualmin

When these parameters are not broadcasted, the UE is making measurements continuously, this is a drawback for the UE battery.

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Table 2-5: 3Gpp criteria Parameter Sintrasearch

Description This parameter define the RSRP threshold for the serving cell, when the RSRP is below that threshold, the UE will start measuring neighbour LTE cells within the same frequency band. If this parameter is not broadcasted, the UE will make measurements all the time. This parameter is replacing Sintrasearch since Rel. 9. This threshold is applicable on RSRQ. It is only present since Rel. 9. Measured cell Rx level value (RSRP)

SintrasearchP SintrasearchQ Qrxlevmeas Qqualmeas Qrxlevmin Qqualmin Pcompensation PEMAX

Measured cell quality value (RSRQ) Minimum required Rx level in the cell (dBm) Minimum required quality level in the cell (dB) max(PEMAX –PPowerClass, 0) (dB) Maximum TX power level an UE may use when transmitting on the uplink in the cell (dBm) defined as PEMAX in [TS 36.101] Maximum RF output power of the UE (dBm) according to the UE power class as defined in [TS 36.101]

PPowerClass

2.1.1.2

3Gpp vs Huawei Parameters Table 2-6: “S” criteria Huawei Parameters (intra – frequency)

3Gpp Name

Huawei Parameter ID SIntraSearchCfgInd

Sintrasearch SintrasearchP SIntraSearchQ Qrxlevmin

Sintrasearch Sintrasearch SIntraSearchQ QRxLevMin QQualMinCfgInd

Qqualmin

QQualMin PMaxCfgInd PMax

PEMAX

Huawei Parameter Name Threshold for intra frequency measurements configure indicator Threshold for intra frequency measurements Threshold for intra frequency measurements RSRQ Threshold for intra frequency measurements Minimum required RX level Minimum intra-frequency reselection required quality level configure indicator Minimum required RX quality level Ue max power allowed configure indicator Max transmit power allowed

Table CellResel CellResel CellResel CellResel CellResel CellResel CellResel CellResel CellResel

Note: SintrasearchP do not exists in Huawei parameters, it is the same as SIntraSearch. 2.1.2 2.1.2.1

Inter-frequency Measurement RF Conditions (“S” criteria)

Rel. 8 and before Srxlev < Snonintrasearch Since Rel. 9 Srxlev < SnonintrasearchP or Squal < SnonintrasearchQ

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Srxlev = Qrxlevmeas – Qrxlevmin– Pcompensation Squal = Qqualmeas – Qqualmin Inter – frequency measurements are always started when the candidate layer has a higher priority than the serving cell. Table 2-7: 3Gpp criteria Parameter Snonintrasearch SnonintrasearchP SnonintrasearchQ Qrxlevmeas Qqualmeas Qrxlevmin Qqualmin Pcompensation PEMAX PPowerClass

2.1.2.2

Description This parameter define the RSRP threshold for the serving cell, when the RSRP is below that threshold, the UE will start measuring neighbour cells. If this parameter is not broadcasted, the UE will make measurements all the time. This parameter is replacing Snonintrasearch since Rel. 9. This threshold is applicable on RSRQ. It is only present since Rel. 9. Measured cell Rx level value (RSRP) Measured cell quality value (RSRQ) Minimum required Rx level in the cell (dBm) Minimum required quality level in the cell (dB) max(PEMAX –PPowerClass, 0) (dB) Maximum TX power level an UE may use when transmitting on the uplink in the cell (dBm) defined as PEMAX in [TS 36.101] Maximum RF output power of the UE (dBm) according to the UE power class as defined in [TS 36.101]

3Gpp vs Huawei Parameters

Table 2-8: “S” criteria Huawei Parameters (inter – frequency) 3Gpp Name

Huawei Parameter ID SNonIntraSearchCfgInd

Snonintrasearch

SNonIntraSearch

SnonintrasearchP

SNonIntraSearch

SnonintrasearchQ

SNonIntraSearchQ

Qrxlevmin

QRxLevMin QQualMinCfgInd

Qqualmin

QQualMin PMaxCfgInd PMax

PEMAX

Huawei Parameter Name Threshold for EUTRAN inter-frequency and interRAT measurements configure indicator Threshold for EUTRAN inter-frequency and interRAT measurements Threshold for EUTRAN inter-frequency and interRAT measurements RSRQ Threshold for EUTRAN inter-frequency and inter-RAT measurements Minimum required RX level Minimum intra-frequency reselection required quality level configure indicator Minimum required RX quality level Ue max power allowed configure indicator Max transmit power allowed

Table CellResel CellResel CellResel CellResel CellResel CellResel CellResel CellResel CellResel

Note: SnonintrasearchP do not exists in Huawei parameters, it is the same as SnonIntraSearch. 2.1.3 2.1.3.1

Inter-RAT Measurement RF Conditions (“S” criteria)

Basically the same conditions are applicable than for inter – frequency, and the same parameters are applicable.

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Rel. 8 and before Srxlev < Snonintrasearch Since Rel. 9 Srxlev < SnonintrasearchP or Squal < SintrasearchQ

where, Srxlev = Qrxlevmeas – Qrxlevmin– Pcompensation Squal = Qqualmeas – Qqualmin Inter – RAT measurements are always started when the candidate layer has a higher priority than the serving cell. Table 2-9: 3Gpp “S” criteria Parameter Snonintrasearch SnonintrasearchP SnonintrasearchQ Qrxlevmeas Qqualmeas Qrxlevmin Qqualmin Pcompensation PEMAX PPowerClass

2.1.3.2

Description This parameter define the RSRP threshold for the serving cell, when the RSRP is below that threshold, the UE will start measuring neighbour cells. If this parameter is not broadcasted, the UE will make measurements all the time. This parameter is replacing Snonintrasearch since Rel. 9. This threshold is applicable on RSRQ. It is only present since Rel. 9. Measured cell Rx level value (RSRP) Measured cell quality value (RSRQ) Minimum required Rx level in the cell (dBm) Minimum required quality level in the cell (dB) max(PEMAX –PPowerClass, 0) (dB) Maximum TX power level an UE may use when transmitting on the uplink in the cell (dBm) defined as PEMAX in [TS 36.101] Maximum RF output power of the UE (dBm) according to the UE power class as defined in [TS 36.101]

3Gpp vs Huawei Parameters

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Table 2-10:“S” criteria Huawei Parameters (inter – RAT) 3Gpp Name

Huawei Parameter ID SNonIntraSearchCfgInd

Snonintrasearch

SNonIntraSearch

SnonintrasearchP

SNonIntraSearch

SnonintrasearchQ

SNonIntraSearchQ

Qrxlevmin

QRxLevMin QQualMinCfgInd

Qqualmin

QQualMin PMaxCfgInd PMax

PEMAX

Huawei Parameter Name Threshold for EUTRAN inter-frequency and interRAT measurements configure indicator Threshold for EUTRAN inter-frequency and interRAT measurements Threshold for EUTRAN inter-frequency and interRAT measurements RSRQ Threshold for EUTRAN inter-frequency and inter-RAT measurements Minimum required RX level Minimum intra-frequency reselection required quality level configure indicator Minimum required RX quality level Ue max power allowed configure indicator Max transmit power allowed

Table CellResel CellResel CellResel CellResel CellResel CellResel CellResel CellResel CellResel

Note: SnonintrasearchP do not exists in Huawei parameters, it is the same as SnonIntraSearch. 2.2

Measurement Start Criteria Current Network Values

The table here below gives the operator current parameter values for the measurement triggering criteria. Table 2-11: Measurement triggering current Huawei parameter values

Huawei Parameter ID QRxLevMin

Minimum required RX level

QQualMinCfgInd

Minimum intra-frequency reselection required quality level configure indicator Minimum required RX quality level

QQualMin SIntraSearchCfgInd Sintrasearch SIntraSearchQ SNonIntraSearchCfgInd SNonIntraSearch SNonIntraSearchQ PMaxCfgInd PMax

Single

Huawei Parameter Name

Threshold for intra frequency measurements configure indicator Threshold for intra frequency measurements RSRQ Threshold for intra frequency measurements Threshold for EUTRAN interfrequency and inter-RAT measurements configure indicator Threshold for EUTRAN interfrequency and inter-RAT measurements RSRQ Threshold for EUTRAN inter-frequency and inter-RAT measurements Ue max power allowed configure indicator Max transmit power allowed

Dual

L800

L1800

L800

L1800

-64 (-128 dBm) CFG

-64 (-128 dBm) CFG

-64 (-128 dBm) CFG

-64 (-128 dBm) CFG

-18 (-18 dB)

-18 (-18 dB)

CFG

CFG

-18 (-18 dB) CFG

-18 (-18 dB) CFG

29 (-70 dBm)

29 (-70 dBm)

5 (-13 dBm)

5 (-13 dBm)

29 (-70 dBm) 5 (-13 dBm)

CFG

CFG

29 (-70 dBm) 5 (-13 dBm) CFG

7 (-114dBm)

7 (-114dBm)

7 (114dBm)

12 (-104 dBm)

4 (-14 dB)

4 (-14 dB)

4 (-14 dB)

4 (-14 dB)

NOT_CFG

NOT_CFG

NOT_CFG

NOT_CFG

(UE Capable Power)

(UE Capable Power)

(UE Capable Power)

(UE Capable Power)

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CFG

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From this table, it can be read that RSRP, RSRQ (Rel. 9 only) are active conditions in order to start measurement of intra-frequency candidates or inter-frequency and inter-RAT frequency candidates. The UE transmit power is not set to a specific value, but is left to its capable transmit power (UE class). So its maximum transmit power is taken into account in the criteria. For Rel.8 UE, when the RSRP of the serving cell (UE camps on) is below -70dBm but above -114dBm, the UE will start to scan intra-frequency candidates. In case the RSRP is below -114dBm, the UE will additionally scan interfrequency and inter-RAT candidates. Above -70dBm, the measurement will not start. For the L1800 dual layer, this threshold is set to -104dBm. For Rel.9 UE, additionally to the RSRP, the RSRQ of the serving cell is taken into account too. As soon as the RSRQ is below -13dB, the UE will start scanning intra-frequency candidates, when this RSRQ is below -14 dB, the UE will additionally scan the inter-frequency and inter-RAT candidates. Note that other criteria are taken into account for the ranking of the candidates, see here below. 2.3

2.3.1

Cell Reselection Criterion

Priorities

As it can be seen in the table here under, The operator is putting the priority on LTE1800. The benefit of this strategy is that LTE1800 is a 15Mhz bandwidth, while LTE800 is only 10 MHz bandwidth, although some exceptions can occur. This means that in good radio conditions, the throughput experienced by the users will be better, or at least the users can share more capacity. When the radio conditions become worst, the user can move to LTE800, where the radio conditions would be better for that same location, usually a 6 to 10 dB better RSRP could be expected. The interaction with other technologies will be considered in the next chapter. Table 2-12: Current Network Priorities Priority

7 6 5 4 3 2 1 0

Network

Remark

Reserved Reserved (LTE2600) LTE1800 LTE800 Reserved (LTE700) UMTS2100 UMTS900 GSM900 + DCS1800

Highest

Lowest

The priorities, together with other information (parameters to follow), are broadcasted as folowing in the message “CommonInfo”: Table 2-13: Priorities broadcast SIB

SIB SIB3(cellReselectionInfoCommon ) SIB5(multiBandInfoList) SIB6(multiBandInfoList) SIB7(commonInfo)

Technologies Intra-frequency Inter-frequency Inter-RAT UMTS Inter-RAT GSM

Notes: -

the RAT priorities must be different, similar priorities between RAT are not supported; G1800 is in the same group (list of ARFCN) of G900, if some G1800 neighbours are defined;

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-

in order to to interpret G1800 channels and G1900 channels, a parameter called “band indicator” defines the bands (GSM_dcs1800 and GSM_psc1900).

The UE shall delete priorities provided by dedicated signalling when: -

the UE enters RRC_CONNECTED state; or

-

the optional validity time of dedicated priorities (T320) expires; or

-

a PLMN selection is performed on request by NAS.

Huawei Priority Parameter: Network EUTRAN (Intra-freq) EUTRAN (Inter-freq)

Huawei Parameter ID CellReselPriority CellReselPriorityCfgInd

EUTRAN (Inter-freq) UTRAN UTRAN GERAN

CellReselPriority CellReselPriorityCfgInd CellReselPriority CellReselPriorityCfgInd

GERAN

CellReselPriority

Huawei Parameter Name Cell reselection priority Inter frequency cell resel priority configure indicator Inter frequency cell resel priority Reselection priority configure indicator Cell reselection priority Cell reselection priority configure indicator Cell reselection priority

Table CellResel EutranInterNFreq EutranInterNFreq UtranNFreq UtranNFreq GeranNfreqGroup GeranNfreqGroup

Note that for GERAN, the priority is made for the whole group of cells, inclusive DCS1800. Parameter details:

Priorities.xlsx

-

The UE shall only perform cell reselection evaluation for EUTRAN frequencies and inter-RAT frequencies that are given in system information and for which the UE has a priority provided. The UE shall not consider any black listed cells as candidate for cell reselection. Blacklists and whitelists are not introduced here in this document. The UE shall inherit the priorities provided by dedicated signalling and the remaining validity time (i.e., T320 in EUTRA) if configured, at inter-RAT cell (re)selection.

Note: there are two different T320, one for the load balancing and one for all the other case. The one considered here is the second one. The current value for T320 is: Table 2-14: Timer values

Timer T320 Other

Value 120 min.

Network EUTRA

T320 parameter details:

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T320.xlsx

2.3.2

Cell reselection and mobility

In order to be sure the UE is on the appropiate cell all the time, it is very critical for LTE. Indeed, as the frequency is shared, when the RSRP of the serving cell starts to decrease, andthe RSRP from a neighbour cell starts to increase, if the reselection is not made on time, the interference will be such that the reselection won’t be possible anymore. Therefore, it is quite important to take other factors into account during the reselection, one factor is the UE speed. The idea is to ease the mobility of fast UE dynamically. The first part is to be able to detect the UE speed. 2.3.2.1

Mobility type detection

There are three different states for the mobility:   

normal mobility; medium mobility; high mobility.

Some parameters need to be set in order to detect the UE mobility states. They are listed here below; Table 2-15: 3Gpp Mobility state parameters Parameter TCRmax NCR_M NCR-H TCRmaxHyst

Description Mobility evaluation duration to determine the mobility state Number of cell reselection during TCRmax to enter the medium mobility state Number of cell reselection during TCRmax to enter the high mobility state Mobility period during which medium or high mobility criteria are not detected in order to move back to the normal mobility state

These parameters are broadcasted on SIB3. State detection criteria: Medium-mobility state criteria: - If the number of cell reselections during time period TCRmax exceeds NCR_M and not exceeds NCR_H High-mobility state criteria: - If the number of cell reselections during time period TCRmax exceeds NCR_H 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: -

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

-

the UE enter to High-mobility state.

the UE enter to Medium-mobility state.

else if criteria for either Medium- or High-mobility state is not detected during time period T CRmaxHyst: -

the UE enter to Normal-mobility state. No spreading without Permission of Huawei and Mobistar

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If the UE is in High- or Medium-mobility state, the UE shall apply the speed dependent scaling rules as defined here under. 2.3.2.2

3Gpp vs Huawei Parameters Table 2-16: Mobility State 3Gpp vs Huawei parameters

3Gpp Name

Huawei Parameter ID SpeedDepReselCfgInd

TCRmax

TEvaluation

NCR_M

NCellChangeMedium

NCR-H

NCellChangeHigh

TCRmaxHyst

THystNormal

2.3.2.3

Huawei Parameter Name Speed-dependent reselection parameter configure indicator The duration for evaluating criteria to enter mobility states The number of cell changes to enter medium mobility state The number of cell changes to enter high mobility state The additional duration for evaluating criteria to enter normal mobility state

Table CellResel CellResel CellResel CellResel CellResel

Mobility criterion (scaling rules) for EUTRAN

There are two ways to ease the mobility of faster UE. One is to play on the hysteresis between cells, and another is based on the time of evaluate other cells, both play a role on the ranking of the candidate cells. There is a separate setting for both medium and high mobility. 2.3.2.3.1

Hysteresis

If the mobility is detected (medium or high) and if the sf-High or sf-Medium for Qhyst is broadcasted, the following is applied to the hysteresis (Qhyst). A negative value in dB is added to the hysteresis, i.e. -4 dB. This is only for intra – frequency candidates. These parameters are broadcasted on SIB3 if activated. In normal mobility, Qhyst is used as such. Table 2-17: 3Gpp Scaling rules for Qhyst parameters (EUTRAN) Parameter

Qhyst sf-High of "Speed dependent ScalingFactor for Qhyst sf-Medium of "Speed dependent ScalingFactor for Qhyst

2.3.2.3.2

Description Hysteresis This is a negative value (dB) that will be applied to Qhyst in case a high speed UE is detected This is a negative value (dB) that will be applied to Qhyst in case a medium speed UE is detected

Evaluation Time

If the mobility is detected (medium or high) and if the sf-High or sf-Medium for TreselectionEUTRA is broadcasted, the following is applied to the evaluation time of candidates (TreselectionEUTRA). The evaluation is multiplied by a value below 1, i.e. 0.5. This is for both intra-frequency and inter-frequency, the intra-frequency is broacasted on SIB3, and on SIB5 for the inter-frequency if activated. In normal mobility, TreselectionEUTRA is used as such. Table 2-18: 3Gpp Scaling rules for Treselection parameters (EUTRAN) Parameter

TreselectionEUTRA

Description The cell reselection timer value

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sf-High of "Speed dependent ScalingFactor for TreselectionEUTRA sf-Medium of "Speed dependent ScalingFactor for TreselectionEUTRA

2.3.2.4

This is a factor to apply to TreselectionEUTRA in case a high speed UE is detected. This is a factor to apply to TreselectionEUTRA in case a medium speed UE is detected.

3Gpp vs Huawei Parameters Table 2-19: Scaling rules for Qhyst Huawei parameters (EUTRAN)

3Gpp Name

Huawei Parameter ID SpeedDepReselCfgInd

Qhyst sf-High

Qhyst QHystSfHigh

sf-Medium

QHystSfMedium

Huawei Parameter Name Speed-dependent reselection parameter configure indicator Hysteresis value for ranking criteria Additional hysteresis applied in high mobility state to q-Hyst Additional hysteresis applied in medium mobility state to q-Hyst

Table CellResel CellResel CellResel CellResel

Table 2-20: Scaling rules for Treselection Huawei parameters (EUTRAN intra-frequency) 3Gpp Name TreselectionEUTRA sf-High sf-Medium

Huawei Parameter ID SpeedStateSfCfgInd TReselEutran TReselEutranSfHigh TReselEutranSfMedium

Huawei Parameter Name Speed state scale factor configure indicator Cell reselection timer value for EUTRAN Scaling factor of TReselEutra in high mobility state Scaling factor of TReselEutra in medium mobility state

Table CellResel CellResel CellResel CellResel

Table 2-21: Scaling rules for Treselection Huawei parameters (EUTRAN inter-frequency) 3Gpp Name

Huawei Parameter ID SpeedDependSPCfgInd

TreselectionEUTRA

EutranReselTime

Huawei Parameter Name Speed dependent resel parameter configuring indicator EUTRAN reselection time

sf-High

TReselEutranSfHigh

Scaling factor of treseleutra in high mobility state

sf-Medium

TReselEutranSfMedium

Scaling factor of treseleutra in medium mobility state

2.3.2.5

Table EutranInt erNFreq EutranInt erNFreq EutranInt erNFreq EutranInt erNFreq

Mobility criterion (scaling rules) for GERAN and UTRAN

For GERAN and UTRAN, only the second method exists, that is the evaluation time. So similar parameter exist for reselction of GERAN and UTRAN. If the mobility is detected (medium or high) and if the sf-High and sf-Medium for TreselectionGERA/UTRA is broadcasted, the following is applied to the evaluation time of candidates (TreselectionGERA/UTRA). The evaluation is multiplied by a value below 1, i.e. 0.5. In normal mobility, TreselectionGERA/UTRA is used as such when activated. These parameters are broadcasted on SIB6 for UTRAN and SIB7 for GERAN. Table 2-22: 3Gpp Scaling rules for TreselectionGERA parameters (GERAN) Parameter

TreselectionGERA

Description The cell reselection timer value

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sf-High of "Speed dependent ScalingFactor for TreselectionGERA sf-Medium of "Speed dependent ScalingFactor for TreselectionGERA

This is a factor to apply to TreselectionGERA in case a high speed UE is detected. This is a factor to apply to TreselectionGERA in case a medium speed UE is detected.

Table 2-23: 3Gpp Scaling rules for TreselectionUTRA parameters (UTRAN) Parameter

TreselectionUTRA sf-High of "Speed dependent ScalingFactor for TreselectionUTRA sf-Medium of "Speed dependent ScalingFactor for TreselectionUTRA

2.3.2.6

Description The cell reselection timer value This is a factor to apply to TreselectionUTRA in case a high speed UE is detected. This is a factor to apply to TreselectionUTRA in case a medium speed UE is detected.

3Gpp vs Huawei Parameters

Table 2-24: Scaling rules for TreselectionGERA Huawei parameters (GERAN) 3Gpp Name

Huawei Parameter ID SpeedStateSfCfgInd

Huawei Parameter Name Speed state scale factor configure indicator

TreselectionGERA

TReselGERAN

Cell reselection timer value for GERAN

sf-HighGERA

TReselGeranSfHigh

Scaling factor of TReselGeran in high mobility state

sf-MediumGERA

TReselGeranSfMedium

Scaling factor of TReselGeran in medium mobility state

Table CellResel Geran CellResel Geran CellResel Geran CellResel Geran

Table 2-25: Scaling rules for TreselectionUTRA Huawei parameters (UTRAN) 3Gpp Name

Huawei Parameter ID SpeedStateSfCfgInd

Huawei Parameter Name Speed state scale factor configure indicator

TreselectionUTRA

TReselUTRAN

Cell reselection timer value for UTRAN

sf-HighUTRA

TReselUtranSfHigh

Scaling factor of TReselUtran in high mobility state

sf-MediumUTRA

TReselUtranSfMedium

Scaling factor of TReselUtran in medium mobility state

2.3.2.7

Table CellResel Utran CellResel Utran CellResel Utran CellResel Utran

Network Current Parameter Values (Cell Reselection - Mobility)

As there are two different LTE layers in the network, both layer are defined here (LTE1800 and LTE800). 2.3.2.7.1

EUTRAN reselection parameter details

Cell Reselection Mobility Parameter Details.xlsx

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2.3.2.7.2

EUTRAN reselection current network value

Table 2-26: Reselection EUTRAN current Huawei parameter values

Huawei Parameter ID

Single

Huawei Parameter Name

Dual

L800 CFG

L1800 CFG

L800 CFG

L1800 CFG

S60_T_EVA LULATION (60s)

S60_T_EV ALULATI ON (60s)

The number of cell changes to enter medium mobility state The number of cell changes to enter high mobility state The additional duration for evaluating criteria to enter normal mobility state

4

4

S60_T_E VALULA TION (60s) 4

S60_T_E VALULA TION (60s) 4

8

8

8

8

S30_T_HYS T_NORMA L (30s)

S30_T_HY ST_NORM AL (30s)

SpeedDepReselCfgIn d Qhyst

Speed-dependent reselection parameter configure indicator Hysteresis value for ranking criteria

CFG

CFG

S30_T_H YST_NO RMAL (30s) CFG

S30_T_H YST_NO RMAL (30s) CFG

DB4_Q_HY ST (4dB)

DB4_Q_H YST (4dB)

QHystSfHigh

Additional hysteresis applied in high mobility state to q-Hyst

DB0_Q_HY ST_SF_HIG H (0dB)

DB0_Q_H YST_SF_H IGH (0dB)

QHystSfMedium

Additional hysteresis applied in medium mobility state to q-Hyst

DB0_Q_HY ST_SF_ME DIUM (0dB)

TReselEutran

Cell reselection timer value for EUTRAN Scaling factor of TReselEutra in high mobility state

1 (1s)

DB0_Q_H YST_SF_M EDIUM (0dB) 1 (1s)

DB4_Q_H YST (4dB) DB0_Q_H YST_SF_ HIGH (0dB) DB0_Q_H YST_SF_ MEDIUM (0dB) 1 (1s)

DB4_Q_H YST (4dB) DB0_Q_H YST_SF_ HIGH (0dB) DB0_Q_H YST_SF_ MEDIUM (0dB) 1 (1s)

4 NOT_CFG

T_RESEL_ SF_0DOT7 5 (0.75) T_RESEL_ SF_1DOT0 (1s) 6 (116dBm) 5 NOT_CFG

T_RESEL _SF_0DO T75 (0.75) T_RESEL _SF_1DO T0 (1s) 6 (116dBm) 4 NOT_CF G

T_RESEL _SF_0DO T75 (0.75) T_RESEL _SF_1DO T0 (1s) 11 (104dBm) 5 NOT_CF G

BitString01

BitString01

BOOLEAN_ FALSE

BOOLEAN _FALSE

BitString0 1 BOOLEA N_FALSE

BitString0 1 BOOLEA N_FALSE

SpeedDepReselCfgIn d TEvaluation

Speed-dependent reselection parameter configure indicator The duration for evaluating criteria to enter mobility states

NCellChangeMedium NCellChangeHigh THystNormal

TReselEutranSfHigh TReselEutranSfMediu m

Scaling factor of TReselEutra in medium mobility state

ThrshServLow

Serving frequency lower priority threshold Cell reselection priority Measurement bandwidth configure indicator Measurement bandwidth Neighbor cell config

CellReselPriority MeasBandWidthCfgI nd MeasBandWidth NeighCellConfig PresenceAntennaPort 1

Presence antenna port1

T_RESEL_S F_0DOT75 (0.75) T_RESEL_S F_1DOT0 (1s) 6 (-116dBm)

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ThrshServLowQCfgIn d ThrshServLowQ

Serving frequency lower priority RSRQ threshold configure indicator Serving frequency lower priority RSRQ threshold

NOT_CFG

NOT_CFG

NOT_CF G

NOT_CF G

Note: NeighCellConfig is only for TDD LTE, so it can be ignored here. 2.3.2.7.3

GERAN reselection parameter details

CellResel Parameters GERAN.xlsx 2.3.2.7.4

GERAN reselection current network value

Table 2-27: Reselection GERAN current Huawei parameter values

Huawei Parameter ID SpeedStateSfCfgInd TReselGERAN TReselGeranSfHigh TReselGeranSfMedium

2.3.2.7.5

Single

Huawei Parameter Name Speed state scale factor configure indicator Cell reselection timer value for GERAN Scaling factor of TReselGeran in high mobility state Scaling factor of TReselGeran in medium mobility state

Dual

L800

L1800

NOT_CFG

NOT_CFG

NOT_CFG

L800

NOT_CFG

L1800

1 (1s)

1 (1s)

1 (1s)

1 (1s)

UTRAN reselection parameter details

CellResel Parameters UTRAN.xlsx 2.3.2.7.6

UTRAN reselection current network value

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Table 2-28: Reselection UTRAN current Huawei parameter values

Huawei Parameter ID SpeedStateSfCfgInd TReselUTRAN TReselUtranSfHigh TReselUtranSfMedium

2.3.3

Single

Huawei Parameter Name Speed state scale factor configure indicator Cell reselection timer value for UTRAN Scaling factor of TReselUtran in high mobility state Scaling factor of TReselUtran in medium mobility state

Dual

L800

L1800

NOT_CFG

NOT_CFG

NOT_CFG

L800

NOT_CFG

L1800

1 (1s)

1 (1s)

1 (1s)

1 (1s)

Other reselection parameters

In the cell reselection parameter group, other parameters are listed as well. Here below the additional parameters. These parameters are related to priorities (lower priority case), RSRQ additional conditions, bandwidth,… Table 2-29: Other Huawei reselection parameters

Huawei Parameter ID ThrshServLow CellReselPriority MeasBandWidthCfgInd MeasBandWidth NeighCellConfig

Huawei Parameter Name Serving frequency lower priority threshold Cell reselection priority Measurement bandwidth configure indicator Measurement bandwidth Neighbor cell config

Table CellResel CellResel CellResel CellResel CellResel

PresenceAntennaPort1

Presence antenna port1

CellResel

ThrshServLowQCfgInd

Serving frequency lower priority RSRQ threshold configure indicator Serving frequency lower priority RSRQ threshold

CellResel

ThrshServLowQ

CellResel

Regarding the priorities, one parameter defines the current serving layer priority. In case of LTE 1800, the priority is set to 5, so the parameter “CellReselPriority” must be set to 5. Please refer to the priorities in 2.3.1. The IE “MeasBandWidth” is used to indicate the maximum allowed measurement bandwidth on a carrier frequency as defined by the parameter Transmission Bandwidth Configuration "NRB" TS 36.104 [47]. “NeighCellConfig” indicates the information related to MBSFN (Multimedia Broadcast multicast service Single Frequency Network) and TDD UL/DL configurations of intra-frequency neighboring cells of the serving cell. It is set to “01” which means that none of the neighboring cells is configured with MBSFN subframes. Please refer to 3Gpp TS 36.331 for more details on this. It is used for MBMS (Multimedia Broadcast Multicast Service). It is present here, as normally for mobility the UE considers that the MBSFN area is continuous when the source cell and the target cell broadcast the same value in the mbsfn-AreaId. The parameter “PresenceAntennaPort1” is used when the neighbours are using DL diversity (transmitting on two antennas), this can be used, but there is no impact on the network. These parameters are broadcasted on SIB3 for the intra – frequency, SIB5 for the inter – frequency, and SIB6 and SIB7 for repectiverly Utran and Geran. The Huawei coresponding tables are as following: GeranNfreqGroup, UtranNfreq and EutraninterNfreq. For the other parameters: ThrshServLow, ThrshServLowQCfgInd, and ThrshServLowQ, refer to the next chapter: Ranking. No spreading without Permission of Huawei and Mobistar

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2.3.4

Ranking (“R” criteria)

2.3.4.1

Cell reselection ranking criteria (Intra-freq. and equal priority for inter-freq.)

2.3.4.1.1

Criteria

The UE will rank all the candidates that fullfill the cell selection “S” criteria, so the one with Srxlev > 0 and Squal > 0 (Rel. 9). RSRP will be considerred for Rel. 8, additionnaly RSRQ will be considerred for Rel.9. The cell reselection will occur as soon as the best candidate is better than the serving cell for a duration of T reselection and if the UE has camped more than one second on the current serving cell. Most of the parameters here below are per neighbour link parameters, so it can differ from one neighbour link to another (usually when it comes from a table where “Ncell” is part of the table name). For the serving cell: Rs = Q meas,s + Q hyst For the neihbour cells Rn = Q meas,n + Q offset where, Qmeas,s,n is the measured RSRP by the UE For intra-frequency, Q offset,s,n is broadcasted on SIB4, if activated, otherwise the value will be 0 For inter-frequency, Q offset = Q offset,s,n + Q offsetfrequency Q offset,s,n and Q offsetfrequency are broadcasted on SIB5, if activated, otherwise the value will be 0. After ranking the cell with the best Rn is choosen. Notes: 2.3.4.1.2

Treselection is adapted by the scaling factor used by the UE mobility detection if active (refer to 2.3.2); Treselection; is broadcasted on SIB3 for intra-frequency and on SIB5 for inter-frequency.

3Gpp vs Huawei Parameters

Table 2-30: “R” criteria offset Huawei parameters (EUTRAN)

3Gpp Name Q offset,s,n Q offsetfrequency Q offset,s,n Qhyst 2.3.4.1.3

Huawei Parameter ID CellQoffset QoffsetFreq CellQoffset Qhyst

Huawei Parameter Name Cell offset Frequency offset Cell offset Hysteresis value for ranking criteria

Table EutranIntraFreqNCell EutranInterNFreq EutranInterFreqNCell CellResel

Huawei Current Parameter Values

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Table 2-31: “R” criteria offset parameter current values (EUTRAN)

Huawei Parameter ID

Single

Huawei Parameter Name

Dual

CellQoffset (Intrafreq) QoffsetFreq

Cell offset (Intra-freq)

L800 dB0 (0dB)

L1800 dB0 (0dB)

L800 dB0 (0dB)

L1800 dB0 (0dB)

Frequency offset

dB1 (1 dB)

dB1 (1 dB)

CellQoffset Qhyst

Cell offset Hysteresis value for ranking criteria

dB0 (0dB) DB4_Q_HY ST (4dB)

dB0 (0dB) DB4_Q_H YST (4dB)

dB1 (1 dB) dB0 (0dB) DB4_Q_H YST (4dB)

dB1 (1 dB) dB0 (0dB) DB4_Q_H YST (4dB)

2.3.4.2

Cell reselection ranking criteria (Inter-RAT and different priority for inter-frequency)

2.3.4.2.1

Criteria

Rel. 8 and before Towards a higher priority inter-frequency or Inter-RAT cell. -

Srxlevn > ThreshHigh for Treselection and the UE should have spent at least one second on the serving cell

where, Srxlevn = Qrxlevmeas,n – Qrxlevmin,n– Pcompensationn Pcompensationn = max(PEMAX,n –PPowerClass,n, 0) Towards a lower priority inter-frequency or Inter-RAT cell. -

In this case, no cells with higher priority should be available in the list; There are no intra-frequency cells or inter-frequency cells with equal priority available in the list Srxlevs < ThreshServLow and Srxlevn > ThreshLow and for Treselection and the UE should have spent at least one second on the serving cell.

where,

Srxlevn = Qrxlevmeas,n – Qrxlevmin,n– Pcompensationn Pcompensationn = max(PEMAX,n –PPowerClass,n, 0)

Srxlevs = Qrxlevmeas,s – Qrxlevmin,s– Pcompensations Pcompensations = max(PEMAX,s –PPowerClass,s, 0) Notes: -

In case several candidates meet the criteria, these candidates are ranked as for intra-frequency ranking criteria (Rs, Rn);

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-

Treselection is adapted by the scaling factor used by the UE mobility detection if active (refer to 2.3.2); Qrxlevmin,n ; PEMAX,n ; PPowerClass,n ; are broadcasted by SIB5, SIB6, SIB7 for inter-frequency EUTRAN, UTRAN, GERAN cells respectively; ThreshLow, ThreshHigh do not exist in Huawei sRAN3, they are replaced by ThreshXLowP, ThreshXHighP respectivelly (please refer for Rel. 9).

Since Rel.9 Towards a higher priority inter-frequency or Inter-RAT cell. If ThreshServLowQ is present on SIB3, the cell reselection to an inter-frequency or inter-RAT cell with a higher priority than the serving can be performed if: EUTRAN or UTRAN FDD -

Squaln > ThreshXHighQ for Treselection and the UE should have spent at least one second on the serving cell

GSM -

Srxlevn > ThreshXHighP for Treselection and the UE should have spent at least one second on the serving cell

-

Srxlevn > ThreshXHighP for Treselection and the UE should have spent at least one second on the serving cell

else,

where, Srxlevn = Qrxlevmeas,n – Qrxlevmin,n– Pcompensationn Pcompensationn = max(PEMAX,n –PPowerClass,n, 0) Squaln = Qqualmeas,n – Qqualmin,n Qrxlevmeas and Qqualmeas are the RSRP and RSRQ measured respectivelly. Towards a lower priority inter-frequency or Inter-RAT cell. If ThreshServLowQ is present on SIB3, the cell reselection to an inter-frequency or intre-RAT cell with a higher priority than the serving cell can be performed if: EUTRAN or UTRAN FDD -

Squals < ThreshServLowQ and Squaln > ThreshXLowQ for Treselection and the UE should have spent at least one second on the serving cell

GSM -

Squals < ThreshServLowQ and Srxlevn > ThreshXLowP for Treselection and the UE should have spent at least one second on the serving cell

else,

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-

Srxlevs < ThreshServLowP and Srxlevn > ThreshXLowP for Treselection and the UE should have spent at least one second on the serving cell

where, Srxlevn = Qrxlevmeas,n – Qrxlevmin,n– Pcompensationn Pcompensationn = max(PEMAX,n –PPowerClass,n, 0) Srxlevs = Qrxlevmeas,s – Qrxlevmin,s– Pcompensations Pcompensations = max(PEMAX,s –PPowerClass,s, 0) Squaln = Qqualmeas,n – Qqualmin,n Squals = Qqualmeas,s – Qqualmin,s Qrxlevmeas and Qqualmeas are the measured RSRP and RSRQ respectivelly. Notes: -

In case several candidates meet the criteria, these high priority candidates are ranked as for intrafrequency ranking criteria (Rs, Rn) for inter-frequency. If the high priority candidates are from inter-RAT, then the ranking should be done with the inter-RAT criteria; Treselection is adapted by the scaling factor used by the UE mobility detection if active (refer to 2.3.2); Qrxlevmin,n ; Qqualmin,n ; PEMAX,n ; PPowerClass,n ; ThreshXHighQ; ThreshXHighP; ThreshXLowQ; ThreshXLowP are broadcasted by SIB5, SIB6, SIB7 for inter-frequency EUTRAN, UTRAN, GERAN cells respectively; ThreshServLowQ; ThreshServLowP; are broadcasted on SIB3. Table 2-32: 3Gpp Ranking Parameters

Parameter Treselection Qrxlevmeas Qqualmeas Qrxlevmin Qqualmin Pcompensation PEMAX PPowerClass ThreshHigh ThreshLow ThreshXHighQ ThreshXHighP ThreshServLowQ ThreshServLowP ThreshXLowQ ThreshXLowP

Description Cell reselection evaluation time Measured cell Rx level value (RSRP) Measured cell quality value (RSRQ) Minimum required Rx level in the cell (dBm) Minimum required quality level in the cell (dB) max(PEMAX –PPowerClass, 0) (dB) Maximum TX power level an UE may use when transmitting on the uplink in the cell (dBm) defined as PEMAX in [TS 36.101] Maximum RF output power of the UE (dBm) according to the UE power class as defined in [TS 36.101] RSRP threshold for higher priority neighbour, is replaced by ThreshXHighP in Rel.9 RSRP threshold for lower priority neighbour, is replaced by ThreshXLowP in Rel.9 RSRQ threshold for higher priority neighbour RSRP threshold for higher priority neighbour, is replacing ThreshHigh in Rel. 9 Serving frequency lower priority RSRQ threshold, is replacing ThreshLow in Rel. 9 Serving frequency lower priority RSRP threshold RSRQ threshold for lower priority neighbour RSRP threshold for lower priority neighbour

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Note: these parameters are specific for EUTRAN, UTRAN and GERAN. 2.3.4.2.2

3Gpp vs Huawei Parameters

GERAN Regarding GERAN neighbours, a group of frequencies is created, this group can contain GSM and DCS frequencies. This group will be seen as a whole from the EUTRAN. Only RxLev and the priority of GERAN neighbours are taken into account. Table 2-33: 3Gpp vs Huawei Ranking GERAN Parameters 3Gpp Name Treselection Qrxlevmin PEMAX ThreshHigh ThreshLow ThreshXHighP ThreshXLowP

Huawei Parameter ID TReselGeran QRxLevMin PmaxGeranCfgInd PmaxGeran (*) (*) ThreshXHigh ThreshXLow

Huawei Parameter Name Cell reselection timer value for GERAN Minimum required RX level PMAX configure indicator PMAX (*) (*) High priority threshold Lower priority threshold

Table

CellReselGeran GeranNfreqGroup GeranNfreqGroup GeranNfreqGroup

GeranNfreqGroup GeranNfreqGroup

(*) These parameters are from Rel. 8 and are replaced by ThreshXHighP and ThreshXLowP since Rel. 9 Other GERAN Huawei reselection parameters to be considered as well for the cell reselection Table 2-34: Other Huawei Ranking GERAN Parameters

Huawei Parameter ID CellReselPriorityCfgInd CellReselPriority BcchGroupId GeranVersion StartingArfcn BandIndicator NccPermitted

Huawei Parameter Name Inter frequency cell resel priority configure indicator Cell reselection priority BCCH group ID Geran version Starting ARFCN Band indicator NCC monitoring permitted

Table GeranNfreqGroup GeranNfreqGroup GeranNfreqGroup GeranNfreqGroup GeranNfreqGroup GeranNfreqGroup GeranNfreqGroup

UTRAN Table 2-35: 3Gpp vs Huawei Ranking UTRAN Parameters 3Gpp Name Treselection Qrxlevmin Qqualmin PEMAX ThreshHigh ThreshLow ThreshXHighQ ThreshXHighP ThreshXLowQ ThreshXLowP

Huawei Parameter ID TReselUtran QRxLevMin Qqualmin PmaxUtran (*) (*) ThreshXHighQ ThreshXHigh ThreshXLowQ ThreshXLow

Huawei Parameter Name Cell reselection timer value for UTRAN Minimum required RX level Minimum required quality level PMAX (*) (*) UTRAN high priority RSRQ threshold UTRAN high priority threshold UTRAN low priority RSRQ threshold UTRAN lower priority threshold

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Table CellReselUtran UtranNFreq UtranNFreq UtranNFreq

UtranNFreq UtranNFreq UtranNFreq UtranNFreq

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(*) These parameters are from Rel. 8 and are replaced by ThreshXHighP and ThreshXLowP since Rel. 9 Other UTRAN Huawei reselection parameters to be considered as well for the cell reselection Table 2-36: Other Huawei Ranking UTRAN Parameters

Huawei Parameter ID CellReselPriorityCfgInd CellReselPriority UtranDlArfcn UtranVersion UtranFddTddType UtranUlArfcnCfgInd UtranUlArfcn

Huawei Parameter Name Inter frequency cell resel priority configure indicator Cell reselection priority Downlink UARFCN UTRAN version UTRAN cell type indicator Uplink UARFCN indicator Uplink UARFCN

Table UtranNFreq UtranNFreq UtranNFreq UtranNFreq UtranNFreq UtranNFreq UtranNFreq

EUTRAN Table 2-37: 3Gpp vs Huawei Ranking EUTRAN Parameters

3Gpp Name Treselection Qrxlevmin

Huawei Parameter ID EutranReselTime QRxLevMin QQualMinCfgInd

Qqualmin

QQualMin

PEMAX ThreshHigh ThreshLow ThreshXHighQ

PMaxCfgInd PMax (*) (*) ThreshXHighQ

ThreshXHighP ThreshXLowQ

ThreshXHigh ThreshXLowQ

ThreshXLowP

ThreshXLow

Huawei Parameter Name EUTRAN reselection time Minimum required RX level Minimum inter-frequency reselection required quality level configure indicator Minimum inter-frequency reselection required quality level Ue max power allowed configure indicator Max transmit power allowed (*) (*) Inter frequency high priority RSRQ threshold Inter frequency high priority threshold Inter frequency high priority RSRQ threshold Inter frequency lower priority threshold

Table EutranInterNFreq EutranInterNFreq EutranInterNFreq EutranInterNFreq EutranInterNFreq EutranInterNFreq

EutranInterNFreq EutranInterNFreq EutranInterNFreq EutranInterNFreq

(*) These parameters are from Rel. 8 and are replaced by ThreshXHighP and ThreshXLowP since Rel. 9 Other EUTRAN (inter-frequency) Huawei reselection parameters to be considered as well for the cell reselection. Table 2-38: Other Huawei Ranking EUTRAN (inter-frequency) Parameters

Huawei Parameter ID CellReselPriorityCfgInd CellReselPriority MeasBandWidth NeighCellConfig

Huawei Parameter Name Inter frequency cell resel priority configure indicator Cell reselection priority Measurement bandwidth Neighbor cell config

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Table EutranInterNFreq EutranInterNFreq EutranInterNFreq EutranInterNFreq

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PresenceAntennaPort1

2.3.4.2.3

Presence antenna port1

EutranInterNFreq

Huawei Ranking Current Parameter Values

GERAN as target Table 2-39: Ranking parameter current value (GERAN)

Huawei Parameter ID

Huawei Parameter Name

TReselGeran

CellReselPriority BcchGroupId GeranVersion StartingArfcn BandIndicator

Cell reselection timer value for GERAN Minimum required RX level PMAX configure indicator PMAX High priority threshold Lower priority threshold Inter frequency cell resel priority configure indicator Cell reselection priority BCCH group ID Geran version Starting ARFCN Band indicator

NccPermitted

NCC monitoring permitted

QRxLevMin PmaxGeranCfgInd PmaxGeran ThreshXHigh ThreshXLow CellReselPriorityCfgInd

Current GUI Values 1

Current Values

0 NOT_CFG 7 7 CFG

-115dBm Not Active UE Power Capability -101dBm -101dBm Active

0 0 EDGE 29

0 Group 0 EDGE 29

GSM_dcs1800

GSM900 and DCS1800 ARFCN

1s

255

UTRAN (U2100 (f1, f2) as target) Table 2-40: Ranking parameter current value (UTRAN, U2100) Huawei Parameter ID TReselUtran QRxLevMin Qqualmin PmaxUtran ThreshXHighQ ThreshXHigh ThreshXLowQ ThreshXLow

Huawei Parameter Name Cell reselection timer value for UTRAN Minimum required RX level Minimum required quality level PMAX UTRAN high priority RSRQ threshold UTRAN high priority threshold UTRAN low priority RSRQ threshold UTRAN lower priority threshold

CellReselPriorityCfgInd

Inter frequency cell resel priority configure indicator Cell reselection priority Downlink UARFCN UTRAN version UTRAN cell type indicator Uplink UARFCN indicator Uplink UARFCN

CellReselPriority UtranDlArfcn UtranVersion UtranFddTddType UtranUlArfcnCfgInd UtranUlArfcn

Current GUI Values 1 -58 -12 24 0 6 0 3 CFG

Current Values 1s -116dBm -12dB (EcNo) 24dBm 0dB

2 10811 HSPA UTRAN_FDD NOT_CFG

2 10811 HSPA FDD Not Active Not Active

-104dBm 0dB -110dBm Active

UTRAN (U900 as target)

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Table 2-41: Ranking parameter current value (UTRAN, U900) Huawei Parameter ID TReselUtran QRxLevMin Qqualmin PmaxUtran ThreshXHighQ ThreshXHigh ThreshXLowQ ThreshXLow

CellReselPriorityCfgInd CellReselPriority UtranDlArfcn UtranVersion UtranFddTddType UtranUlArfcnCfgInd UtranUlArfcn

Huawei Parameter Name Cell reselection timer value for UTRAN Minimum required RX level Minimum required quality level PMAX UTRAN high priority RSRQ threshold UTRAN high priority threshold UTRAN low priority RSRQ threshold (EcNo) UTRAN lower priority threshold

Inter frequency cell resel priority configure indicator Cell reselection priority Downlink UARFCN UTRAN version UTRAN cell type indicator Uplink UARFCN indicator Uplink UARFCN

Current GUI Values 1 -58 -12 24 0 6 0

Current Values 1s -116dBm -12dB (EcNo) 24dBm 0dB -104dBm 0dB

3 CFG

-110dBm Active

1 3081 HSPA UTRAN_FDD NOT_CFG

1 3081 HSPA FDD Not Active Not Active

EUTRAN (L800 as target) Table 2-42: Ranking parameter current value (EUTRAN, L800) Huawei Parameter ID

Huawei Parameter Name

Current GUI Values

Current Values

EutranReselTime QRxLevMin QQualMinCfgInd

EUTRAN reselection time Minimum required RX level Minimum inter-frequency reselection required quality level configure indicator Minimum inter-frequency reselection required quality level Ue max power allowed configure indicator Max transmit power allowed Inter frequency high priority RSRQ threshold Inter frequency high priority threshold Inter frequency high priority RSRQ threshold Inter frequency lower priority threshold Inter frequency cell resel priority configure indicator Cell reselection priority Measurement bandwidth Presence antenna port1

1 -64 NOT_CFG

1s -128dBm Not Active

QQualMin PMaxCfgInd PMax ThreshXHighQ ThreshXHigh ThreshXLowQ ThreshXLow CellReselPriorityCfgInd CellReselPriority MeasBandWidth PresenceAntennaPort1

Not Active NOT_CFG

Not Active Not Active

0 11 0

-106dBm

7 CFG

-114dBm Active

4 MBW50 BOOLEAN_FALSE

4 10MHz Not Used

EUTRAN (L1800 as target)

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Table 2-43: Ranking parameter current value (EUTRAN, L1800) Huawei Parameter ID

Huawei Parameter Name

Current GUI Values

Current Values

EutranReselTime QRxLevMin QQualMinCfgInd

EUTRAN reselection time Minimum required RX level Minimum inter-frequency reselection required quality level configure indicator Minimum inter-frequency reselection required quality level Ue max power allowed configure indicator Max transmit power allowed Inter frequency high priority RSRQ threshold Inter frequency high priority threshold Inter frequency high priority RSRQ threshold Inter frequency lower priority threshold Inter frequency cell resel priority configure indicator Cell reselection priority Measurement bandwidth Presence antenna port1

1 -64 NOT_CFG

1s -128dBm Not Active

QQualMin PMaxCfgInd PMax ThreshXHighQ ThreshXHigh ThreshXLowQ ThreshXLow CellReselPriorityCfgInd CellReselPriority MeasBandWidth PresenceAntennaPort1

2.3.4.3

Not Active NOT_CFG

Not Active Not Active

0 13 0

-102 dBm

11 CFG

-106 dBm Active

5 MBW75 BOOLEAN_FALSE

5 15MHz Not Used

Reselection Ranking parameter details

CellResel Parameters Ranking.xlsx

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2.4

Reselection Example

Figure 2-2: Reselection example

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Figure 2-3: Reselection example

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Figure 2-4: Reselection example

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2.5 2.5.1

Cell Reselection Summary (Rel. 8) L800 and L1800 layers Figure 2-5: L800 and L1800 layers non-colocated

Site A

Site B

Layer Priority

Priority 2

Priority 1

Priority 0

Priority 0

U210 0 (f2) U210 0 (f1) U900

G180 0 G900

Layer Priority

RSRP > -114 dBm F1/U9

RSRP < -116 dBm L8 & RSCP > -110 dBm and EcNo > -12 dB RSRP < -116 dBm & RSSI > -101 dBm G9-G18

L1800

L800

Priority 5

If RSRP L1800 < -106 dBm If RSRP L800 > Priority -114 dBm4

RSRP > -114 dBm

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Figure 2-6: L800 and L1800 layers colocated

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Layer Priority

Priority 2

Priority 1

Priority 0

Priority 0

U210 0 (f2) U210 0 (f1) U900

G180 0 G900

RSRP > -114 dBm F1/U9

RSRP < -116 dBm L8 & RSCP > -110 dBm and EcNo > -12 dB RSRP < -116 dBm & RSSI > -101 dBm G9-G18

L1800

L800

RSRP > -114 dBm

Layer Priority

Priority 5

If RSRP L1800 < -106 dBm If RSRP L800 > Priority -114 dBm4

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Notes:      

When L1800 and L800 are present, the user will first reselect L800 before going to other technologies; When the user is in conditions to reselect a 2G cell, the user will reselect G900, not G1800 as usually G900 is 6 to 10dB better in terms of level, the priority is the lowest and the same for both G900 and G1800; When the user is in conditions to reselect a 3G cell, it will preferably do it to U900, as it is usually better by 6 to 10 dB in terms of level. Otherwise it will do it to U2100, but on f1 only; This is only for Rel.8 and before, as for Rel.9 and later, RSRQ is also a criteria (if active); The setting is the same for colocated technologies, and non colocated technologies. But could evolve in the future; These figures also show the reselection from GSM and UMTS to be complete, they are are addressed in the next chapter.

L800 layer only

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Figure 2-7: L800 layer non-colocated

Site A

Site B

Layer Priority

Priority 2

Priority 1

Priority 0

Priority 0

U210 0 (f2) U210 0 (f1) U900

G180 0 G900

Layer Priority

RSRP > -114 dBm F1/U9

RSRP < -116 dBm & RSCP > -110 dBm and EcNo > -12 dB RSRP < -116 dBm & RSSI > -101 dBm G9-G18

L800

Priority 4

RSRP > -114 dBm

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Figure 2-8: L800 layer colocated

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Layer Priority

Priority 2

Priority 1

Priority 0

Priority 0

U210 0 (f2) U210 0 (f1) U900

G180 0 G900

RSRP > -114 dBm F1/U9

RSRP < -116 dBm & RSCP > -110 dBm and EcNo > -12 dB RSRP < -116 dBm & RSSI > -101 dBm G9-G18

L800

RSRP > -114 dBm

Layer Priority

Priority 4

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2.5.2

L1800 layer only Figure 2-9: L1800 layers non-colocated

Site A

Site B

Layer Priority

Priority 2

Priority 1

Priority 0

Priority 0

U210 0 (f2) U210 0 (f1) U900

G180 0 G900

Layer Priority

RSRP > -114 dBm F1/U9

L1800

Priority 5

RSRP < -116 dBm & RSCP > -110 dBm and EcNo > -12 dB RSRP < -116 dBm & RSSI > -101 dBm G9-G18 RSRP > -114 dBm

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Figure 2-10: L1800 layers colocated

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Layer Priority

Priority 2

Priority 1

Priority 0

Priority 0

U210 0 (f2) U210 0 (f1) U900

G180 0 G900

RSRP > -114 dBm F1/U9

RSRP < -116 dBm & RSCP > -110 dBm and EcNo > -12 dB RSRP < -116 dBm & RSSI > -101 dBm G9-G18

L1800

RSRP > -114 dBm

Layer Priority

Priority 5

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2.5.3

Intra-frequency reselection

Figure 2-11: L800 and L1800 intra-frequency

If RSRPN > RSRPS + 4 dB (Qhyst)

L1800

L1800

If RSRPN > RSRPS + 4 dB (Qhyst)

L800

L800

Notes: - this applies to single and dual layer sites, the cell offset is set to 0dB; - the SintraSearch is set to -70 dBm.

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2.5.4

Inter-frequency reselection

Figure 2-12: L800 and L1800 inter-frequency

Site A

Site B

L1800 If RSRP L1800 > -102 dBm

L800

L1800 If RSRP L1800 < -116 dBm If RSRP L800 > -114 dBm If RSRP L1800 > -112 dBm

If RSRP L1800 < -106 dBm If RSRP L800 > -114 dBm L800

Priority =5

Priority =4

Notes: - this applies to single and dual layer sites, the total cell offset is set to 1dB, so an additional dB needs to be added to the neighbours RSRP; - SnonIntraSearch = -114 dBm except for dual layer L1800 where it is -104 dBm.

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3

GSM/UMTS to LTE Cell Reselection

3.1

GSM to LTE Cell Reselection

This functionality has been introduced since Rel. 8, with the arrival of the LTE technology. The UE must be LTE compliant, and the SIM/USIM should allow this technology. As for GSM to UMTS reselection, the necessary information is broacasted on the system information type 2Quater (SI2Quater ). This type of inter-RAT reselection is priority based. In this case, the LTE network has the highest priority. The Cell Reselection Between GSM and LTE feature can be used only if neighboring LTE cells are configured. Each GSM cell can be configured with a maximum of 64 LTE neighboring cells. These neighboring cells can use a maximum of eight LTE frequencies. The respective 3Gpp references are: TS 45.008 & TS 44.060. 3.1.1 3.1.1.1

Cell Reselection feature configuration and activation Priority Network Configuration

The priorities need to be set for all technologies. The current priorities are listed in 2.3.1. Here below the priority parameter concerned: Table 3-44: GSM to LTE Cell Reselection Huawei Priority Parameters

Huawei Parameter ID EUTRANPRI NCELLPRI GERANPRI

Huawei Parameter Name EUTRAN Priority Neighboring Cell Priority GERAN Priority

Table GCELLPRIEUTRANSYS GLTENCELL GCELLPRIEUTRANSYS

Note: NCELLPRI is per neighbour individual priority, usually it is not used. If it is defined, this priority is overtaking the EUTRAN priority defined by EUTRANPRI (common priority for the LTE network). In order to ignore NCELLPRI, it must be set to 255. The UE should get the priority information from the network. 3.1.1.2

Activation

In order to allow the UE to reselect an LTE cell from GSM, the SI2Quater should be broadcasted with the necessary LTE information (neighbouring LTE cells and related parameters), this broadcast is controlled by the following parameters: LTECELLRESELEN and Send2QuterFlag . These parameters need to be set to YES. The parameter THRPRISEARCH trigger the inter-RAT measurements. The inter-RAT measurements could be permanent, in that case this parameter needs to be set to “Always” (15), or the measueremnts can be triggered as soon as the the GSM serving cell and the GSM neighbour cells RSSI is below this parameter. Table 3-45: : GSM to LTE Cell Reselection Huawei Activation Parameters

Huawei Parameter ID LTECELLRESELEN Send2QuterFlag THRPRISEARCH 3.1.1.3

Huawei Parameter Name LTE Cell Reselection Allowed Support Sent 2QUATER

Table GCELLHOBASIC OTHSOFTPARA GCELLPRIEUTRANSYS

Neigbour definition

The LTE neighbours must be defined in the following table:  

GLTENCELL GEXTLTECELL

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In the first table GLTENCELL all GSM-LTE neighbours are defined (source-taret), and in the second one, all LTE cells that appears in the first table must be defined as external. Most probably an LTE cell defined in the GEXTLTECELL will be used several times in GLTENCELL. GLTENCELL table content (parameters) Table 3-46: GSM to LTE Cell Reselection - neighbours definition (GLTENCELL)

Huawei Parameter ID BSCName BIDIRECTION SRCCELLNAME NBRCELLNAME SRCLTENCELLID NBRLTENCELLID SPTRESEL SPTBLINDHO SPTRAPIDSEL NCELLPRI

Huawei Parameter Name BSC Name Add Bidirection Neighboring Cell Or Not Source cell name Neighbor cell name Source Cell Index Neighbor Cell Index Support Cell Reselection Support Blind Handover Support Rapid Reselection Neighboring Cell Priority

Value             SUPPORT UNSUPPORT UNSUPPORT 255

The first parameters like the BSC Name,… are variable. The last 4 are default ones, the ones important here are SPTRESEL and NCELLPRI. When the Fast Reselection feature is activated (see next feature topic 3.1.3), the parameter: SPTRAPIDSEL will be set to SUPPORT. GEXTLTECELL table content (parameters) Table 3-47: GSM to LTE Cell Reselection - neighbours definition (GEXTLTECELL)

Huawei Parameter ID BSCName EXTLTECELLID EXTLTECELLNAME MCC MNC ENODEBTYPE CI TAC FREQ PCID EUTRANTYPE OPNAME

Huawei Parameter Name BSC Name Cell Index Cell Name MCC MNC eNodeB Type Cell CI Cell TAC EARFCN Physical Cell ID EUTRAN Cell Type Operator Name

Value       206 10 MACRO         FDD

Some parameters are constant and network dependent here, like the MCC, MNC, EUTRANTYPE, OPNAME, some others are variable, and change on aper cell/link basis. Neighbour parameter details

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GSM LTE NB.xlsx

3.1.2 3.1.2.1

Triggering Conditions GERAN priority is lower than EUTRAN priority (GERANPRI < EUTRANPRI)

In case the EUTRAN priority is higher than the GERAN priority (serving cell), this is the case in this network, and that the individual priority NCELLPRI is set to 255, the conditions for the target cell are as following: S_NonServingEUTRANN > THREUTRANHIGH for at least TRESEL Where, S_NonServingEUTRANN : RSRPN – EUTRANQRXLEVMIN Where, RSRPN is the measured RSRP of one LTE neighbours; EUTRANQRXLEVMIN is also broadcasted on the SI2quater and represent the absolute minimum RSRP allowed for reselection. THREUTRANHIGH: is broadcasted on the SI2quater and represents the higher priority EUTRAN cell threshold. TRESEL: is the period time during the conditions must be met. In case several LTE neighbours have the same priority, which is the case when individual priority NCELLPRI is set to 255, the one with the best RSRPN is selected. Note: when the EUTRAN cells have a higher priority than the GERAN, EUTRAN cells are always reported as candidates, whatever the serving cell conditions, the parameter THRPRISEARCH do not play a role here.

3.1.2.2

EUTRAN priority is lower than GERAN priority (GERANPRI > EUTRANPRI)

In case the EUTRAN priority is lower than the GERAN priority (serving cell), and that the individual priority NCELLPRI is set to 255, the conditions for the target cell are as following: If C1 < THRGSMLOW and S_NonServingEUTRANN > THREUTRANLOW for at least TRESEL then the conditions are met for the target cell. If several EUTRAN cells have the same priority, then the one with the best RSRP will be selected. Where, C1: is the GSM Path Loss C1 criteria of the serving cell; S_NonServingEUTRANN : RSRPN – EUTRANQRXLEVMIN; No spreading without Permission of Huawei and Mobistar

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Where, RSRPN is the measured RSRP of one LTE neighbours; EUTRANQRXLEVMIN is also broadcasted on the SI2quater and represent the absolute minimum RSRP allowed for reselection. THRGSMLOW: is the GSM serving cell and GSM neighbour cells threshold broadcasted on SI2quater; TRESEL: is the period time during the conditions must be met; THREUTRANLOW: is broadcasted on the SI2quater and represents the lower priority EUTRAN cell threshold. If no cells meet these criterion for at least TRESEL, then the target cell will be the one where S_NonServingEUTRANN is greater than C1+HPRIO. The best one will be used in case several cells have their S_NonServingEUTRANN above C1+HPRIO. C1: is the GSM Path Loss C1 criteria of the serving cell; HPRIO: is broadcasted on the SI2quater; S_NonServingEUTRANN : RSRPN – EUTRANQRXLEVMIN; Where, RSRPN is the measured RSRP of one LTE neighbours; EUTRANQRXLEVMIN is also broadcasted on the SI2quater and represent the absolute minimum RSRP allowed for reselection.

Notes: -

3.1.2.3

UTRAN priority also needs to be considered; Cell reselection to a cell of another radio access technology (e.g. UTRAN) shall not occur within 5 seconds after the MS has reselected a GSM cell from an inter-RAT cell if a suitable GSM cell can be found.

Network Current Parameter Values (GSM-LTE Cell Reselection)

These parameters can be found in table: GCELLPRIEUTRANSYS.

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Table 3-48: GSM to LTE Cell Reselection – current parameter values

Huawei Parameter ID

Huawei Parameter Name

GERANPRI UTRANPRI EUTRANPRI THRPRISEARCH THRGSMLOW THREUTRANHIGH THREUTRANLOW

GERAN Priority UTRAN Priority EUTRAN Priority Inter-RAT Search THD Based on Priority Low GSM Threshold Based on Priority EUTRAN Cell Resel High THD Based on PRI EUTRAN Cell Resel Low THD Based on PRI Min RX Level of EUTRAN Cell Based on PRI Cell Resel Level Hyst Based on PRI Cell Resel Time Hyst Based on PRI

EUTRANQRXLEVMIN HPRIO TRESEL

Current GUI Values 0 1 (U900), 2 (U2100) 5 (L1800), 4 (L800) 15 0 8 8

Current Values 0 1, 2 4, 5 Always C1 > 0 -112 dBm -112 dBm

6

-128 dBm

0 0

0 dB 5s

As known already, GERAN has the lowest priority, so the idea is to move back to LTE as soon as possible, so that the user is in the best conditions to make a data call (expected throughput). In case the user would like to start a CS call while being on the LTE network, the so called CS fallback feature exists. See in related chapter. The UE is always searching for the LTE network, as the parameter THRPRISEARCH is set to “always”. So as soon as the UE find an LTE cell with an RSRP greater tha -112 dBm during at least 5 second, it will reselect that cell if it is allowed to (no barred cell,…). Note: the following parameter are common for UTRAN reselection: TRESEL, HPRIO, THRGSMLOW, THRPRISEARCH. There are specific thersholds for UTRAN, as there are for EUTRAN. 3.1.2.4

Other reselection parameters

The following parameters are in the same table: GCELLPRIEUTRANSYS, but are used in case the feature eNC2 (Network Control Reselection) is active (it isn’t currently), in that case the network is controlling the reselection based on measurement reports, this is especially usefull in case of load balance featuring,…: Table 3-49: GSM to LTE Cell Reselection – other parameters

Huawei Parameter ID QPEUTRAN

EUTRAN Cell Search Thres. in Packet Mode

 15

THREUTRANRPT

EUTRAN Cell Reporting Threshold

 0

Current Values Never (no EUTRAN cell search -140 dBm

BESTEUTRANCELLNUM

Number EUTRAN Cells in Best Cell List

 2

2

3.1.2.5

Huawei Parameter Name

Current GUI Values

GSM-LTE reselection Parameter details

GSM to (E)UTRAN Reselection Parameters GCELLPRIEUTRANSYS v2.xlsx

3.1.3

Fast return to LTE (Fast LTE Reselection at 2G CS call release)

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The fast LTE reselection at CS call release is an optional feature that permits the UE to quickly returned to LTE after a CS call, this is usefull since the CS call are done on another technology (also refer to CS Fall back). UE must be compliant with R6. The idea is to provide the UE with the necessary informtion during the call release phase in order to immediatelly reselect the LTE cell without having to go through the idle mode reselection procedure explained here above. Figure 3-13: Fast LTE Reselection at 2G CS call release - message flow

3.1.3.1

Feature activation

First the LTE neighbours need to be created in the following tables: GLTENCELL and GEXTLTECELL as explained earlier. In order to have the feature activated, the parameter SPTRAPIDSEL needs to be set to SUPPORT. This parameter is set on a per neighbour link basis. Table 3-50: Fast LTE Reselection at 2G CS call release - neighbours definition (GLTENCELL)

Huawei Parameter ID BSCName BIDIRECTION SRCCELLNAME NBRCELLNAME SRCLTENCELLID NBRLTENCELLID SPTRESEL SPTBLINDHO SPTRAPIDSEL NCELLPRI

Huawei Parameter Name BSC Name Add Bidirection Neighboring Cell Or Not Source cell name Neighbor cell name Source Cell Index Neighbor Cell Index Support Cell Reselection Support Blind Handover Support Rapid Reselection Neighboring Cell Priority

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Value             SUPPORT UNSUPPORT UNSUPPORT 255

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3.2

UMTS to LTE Cell Reselection

3.2.1

Cell Reselection feature configuration and activation

The cell reselection detailed here under is the one where the absolute prorities are defined and broadcasted. There is also a possibility to have cell reselection when the priorities are not defined, so when they are not broadcasted. In this case, the priorities are defined and broadcasted towards the UE. Also the HCS (Hierarchical Cell Structure) is not in use. According to specifications, HCS shall not be used for inter-frequency and inter-RAT reselection if absolute priority based cell reselection is used. Details can be found in 3Gpp TS 25.304 and TS 25.133. 3.2.1.1

Priority Network Configuration

The priorities need to be set for all technologies. The current priorities are listed in 2.3.1. Here below the priority parameters concerned: Table 3-51: UMTS to LTE Cell Reselection - Huawei Priority Parameters

Huawei Parameter ID NPriority SPriority

Huawei Parameter Name Absolute Priority Level of the E-UTRA Frequency Absolute priority level of the serving cell

Table UCELLNFREQPRIOINFO UCELLSELRESEL

These priorities are broacasted on the SIB19 together with the other parameters. 3.2.1.2

Neigbour definition

No neighbours need to be defined, the UE is informed to scan the EUTRAN frequency. 3.2.2

Measurement criterion

3.2.2.1

RF Conditions (“S” criteria)

When the EUTRAN priority is higher than the one of the UTRAN (serving cell), the EUTRAN frequency will always been measured. When the EUTRAN priority is lower than the one of the UTRAN (serving cell), then the following conditions will be used: -

If SrxlevS > Sprioritysearch1 and SqualS > Sprioritysearch2 the UE may choose not to perform measurements of inter-RAT layers of lower priority;

-

If SrxlevS