WCDMA P&O a en Handover Control 201012

7/27/2019 WCDMA P&O a en Handover Control 201012

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Handover control feature


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Content

Intra-frequency handover

Inter-frequency handover

Inter-RAT handover

HSDPA handoverHSUPA handover


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Function Introduction

Measurement Control

Related Events

Event HandlingCase Study


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Softer Handover vs. Soft Handover

Softer Handover Soft Handover

macro diversity macro diversity


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Measurement Control

Related Events



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Measurement Control

When to set up intra-frequency Measurement? When to modify intra-frequency Measurement?

When to delete intra-frequency Measurement?


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Parameter Configuration in MC

Intra-frequency events: MeasEvtNum, MeaEvtId Measurement quantity: IntraMeasQuan (Ec/N0 or

RSCP)

Report mode: SoftHoMth (Periodical or event-based)

Which parameters are used in macro diversity?


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Measurement Control

Related Events



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Intra-frequency Events

Layer 3 filter:

Event 1A:

Event 1B:

Event 1C:

Event 1D:

nnn MaFaF 1)1(

/2)H(RLogM10W)(1MLog10WCIOLogM10 1a1aBest

N

1i

iNewNew

A

/2)H(RLogM10W)(1MLog10WCIOLogM10 1b1bBest

N

1i

iOldOld

A

/2HCIOLogM10CIOLogM10 1cInASInASNewNew

/2HCIOLogM10CIOLogM10 1dBestBestNotBestNotBest


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Time-To-Trigger

Reportingevent 1A

Measurementquantity

Time

TrigTime[MAX_INTRA_MEAS_EVENT]

P CPICH 1RptRange

[MAX_INTRA_MEAS_EVENT]

P CPICH 2

P CPICH 3


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The intra-frequency configuration index


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Configuration Parameter

Event Method

Ec/N0

Configuration

index related

traffic: 1


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Measurement configuration

index: 2


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Measurement

configuration

index: 2

Thresholds of

event e1a-e1j


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Intra-Frequency Handover Parameter Summary

Parameter Name Default Value TRUE Value

Measurement Priority of Neighboring Cell 0 0

Detected Set Handover Switch Open Open

Reporting Range Constant for Event 1A 3db 3db

Reporting Range Constant for Event 1B 5db 5db

Weight for Event 1A 0 0

Weight for Event 1B 0 0

Hysteresis 1A 0db 0db

Hysteresis 1B 0db 0db

Hysteresis 1C 4db 4db

Hysteresis 1D 4db 4db

Filter Coefficient 2db 2db

Time To Trigger 1A 200ms 200ms

Time To Trigger 1B 640ms 640ms


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Intra-Frequency Handover Parameter Summary


Time To Trigger 1C 320ms 320msTime To Trigger 1D 320ms 320ms

Amount of Reporting in Period Report Criteria Infinity Infinity

Reporting Interval in Period Report Criteria 1s 1s

Cell Individual Offset (UtranCell) 0db 0db

Cell Individual Offset (UtranRelation) 0db 0db

Reporting Deactivation Threshold for Event 1A 2 2Replacement Activation Threshold for Event 1C 3 3

UTRAN Measurement Quantity for Intra-frequency

MeasurementsEc/No Ec/No

CPICH Ec/No Reporting Indicator TRUE TRUE

CPICH RSCP Reporting Indicator TRUE TRUE

Pathloss reporting indicator FALSE FALSE

Event Number of Intra-frequency Measurement 7 7

Maximum Number of Cells Within DCH Active Set 3 3

Soft Handover Method Event method Event method


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Measurement Control

Related Events



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Event Handling

Event 1A MaxNumOfAct, handover punishment timer, MR

contains several target cells?

Event 1B

MR contains several target cells?

Event 1C

MaxNumOfAct, handover punishment timer

Event 1D

e1d triggered by cell outside AS

e1d triggered by cell in AS


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Measurement Control

Related Events



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Intra-Frequency Handover Sample


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Content



Inter-RAT handover



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Measurement Control

Related Events



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Soft Handover vs. Hard Handover

Soft Handover Hard Handover

macro diversity


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Measurement Control

Related Events



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Measurement Control

When to set up inter-frequency Measurement? When to modify inter-frequency Measurement?

When to delete inter-frequency Measurement?


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Inter-frequency events: MeasEvtNum, MeaEvtId Measurement quantity: NonIntraMeasQuan (Ec/N0

or RSCP)

Report mode: InterHoMth (Periodical or event-based)


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Measurement Control

Related Events



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Inter-frequency Events

Layer 3 filter:

Event 2A (default configuration):

Event 2B/ &

2C

Event 2D (default configuration):

Event 2E/2F

Trigger Time

nnn

MaFaF 1)1(

jBestj

N

1i

jijjfrequencyjfrequency LogM10)W(1MLog10WLogM10QjA

/2HQQ 2aBestNotBest

/2HTQ 2d2dUsedUsed

/2HTQ 2b2busedNonusedNon /2HTQ 2b2bUsedUsed

/2HTQ 2c2cusedNonusedNon


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The inter-frequency configuration index


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Configuration parameter

Event

Method

RSCPConfiguratio

n index

related

traffic:1


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Measurement configuration index: 7


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Thresholds of event e2a-e2f


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Inter-Frequency Handover Parameter SummaryParameter Name Default Value TRUE Value

Measurement Priority of Neighboring Cell 0 0

Inter-frequence Handover Tactic 2A Event Trigger 2A Event Trigger

Filter Coefficient 3 3

Absolute Threshold of the Quality of the Currently Used

Frequency for 2B-95db -95db


Frequency for 2D-95db -95db


Frequency for 2F-70db -70db

Weight of the Currently Used Frequency for 2A 0 0

Weight of the Currently Used Frequency for 2B 0 0

Weight of the Currently Used Frequency for 2D 0 0

Weight of the Currently Used Frequency for 2F 0 0

Hysteresis 2A 4db 4db

Hysteresis 2B 4db 4db

Hysteresis 2C 4db 4db

Hysteresis 2D 4db 4db

Hysteresis 2E 4db 4db

Hysteresis 2F 4db 4db


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Inter-Frequency Handover Parameter Summary




Time To Trigger 2C 100ms 100ms

Time To Trigger 2D 640ms 640ms

Time To Trigger 2E 100ms 100ms

Time To Trigger 2F 640ms 640ms

Absolute Threshold of the Quality of the Non-used Frequency for

2B-50dbm -50dbm

Absolute Threshold of the Quality of the Non-used Frequency for2C -50dbm -50dbm

Absolute Threshold of the Quality of the Non-used Frequency for

2E-95dbm -95dbm

Weight of the Non-used Frequency for 2A 0 0

Weight of the Non-used Frequency for 2B 0 0

Weight of the Non-used Frequency for 2C 0 0

Weight of the Non-used Frequency for 2E 0 0

Share Cover Indication Neighbor Neighbor

Inter-frequency Handover Method Event method Event method

UTRAN Measurement Quantity for Inter-frequency and Inter-RAT

measurementsRSCP RSCP


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Measurement Control

Related Events



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Event Handling

Event 2A/2B/2C

Event 2D

Compressed mode

Configure MC of 2A/2B/2C/2E

Event 2E: attempt to Inter-RAT handover

Event 2F

Close compressed mode Disable inter-freq MC


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Measurement Control

Related Events



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Inter-Frequency Handover Sample

38


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Inter-Frequency Handover Sample2

39

Ec_f1

Ec_f2

2D t2F 2D

2

F

2A

2

D

RSCP


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Content



Inter-RAT handover



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Inter-RAT handover

Measurement Control

Related Events

Event Handling

Case Study


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Measurement Control

When to set up inter-RAT Measurement? When to modify inter-RAT Measurement?

When to delete inter-RAT Measurement?


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Inter-frequency events: MeasEvtNum, MeaEvtId Measurement quantity: NonIntraMeasQuan (Ec/N0

or RSCP)

Report mode: InterHoMth (event-based only)


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Inter-RAT handover

Measurement Control

Related Events

Event Handling

Case Study

)1(


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Inter-RAT Events

Layer 3 filter:

Event 3A (default configuration):

&

Event 3C

nnnMaFaF 1)1(

nnnMaFaF 1)1(

Best

N

1i

iUTRANUTRAN LogM10W)(1MLog10WLogM10QA

/2HTQ 3aUsedUsed /2HTCIOM 3aRATOtherRATOtherRATOther

/2HTCIOM 3cRATOtherRATOtherRATOther


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The inter-RAT configuration index


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Configuration parameter

Event

Method

RSCP

Configur

ation

index

related

traffic:1


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Inter-RAT Handover Parameter Summary


Measurement Priority of Neighboring GSM Cell 0 0

Inter-Rat Handover Tactic 3A Event Trigger 3A Event Trigger

Absolute Threshold of the Quality of UTRAN Cell for

3A-95dbm -95dbm

Weight of the UTRAN System for 3A 0 0

Absolute Threshold of the Quality of Other RAT for 3A -90dbm -90dbm

Absolute Threshold of the Quality of Other RAT for 3B -95dbm -95dbm

Absolute Threshold of the Quality of Other RAT for 3C -95dbm -95dbm

Hystersis 3A 4db 4db

Hystersis 3B 4db 4db

Hystersis 3C 4db 4db


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Inter-RAT Handover Parameter Summary




Time To Trigger 3C 100ms 100ms

UTRAN Filter Coefficient(Rat) 3 3

GSM Filter Coefficient(Rat) 3 3

GSM BSIC Verification Required Indicatior Required Required

UTRAN Quality Estimation Reporting Indicator Not Report Not Report

GSM Carrier RSSI Reporting Indicator Report Report

Cell individual offset(gsmRelation) 0db 0db

UTRAN Measurement Quantity for Inter-frequency

and Inter-RAT MeasurementsRSCP RSCP

Share Cover Indication Neighbor Neighbor


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Event Handling

Event 3A/3C: attempt to Inter-RAT handover


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Inter-RAT handover

Measurement Control

Related Events

Event Handling

Case Study


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Inter-RAT Handover Sample

56


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Inter-RAT Handover Sample1

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Ec_f1

GSM

2D t2F 2D

2

F

3A

2

D

3A(G)

RSCP

3A(W

)


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Inter-RAT Handover Sample2

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Ec_f1

GSM

Ec_f2

2D t2F 2D

2

F

2E 3A

2

D

2

E

3A(

G)

RSCP

3A(

W)


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Content



Inter-RAT handover



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Function description

For HSDPA in some cases there is handoverassociated with channel switch


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HS-DSCH->DCH DCH->HS-DSCH

HS-DSCH->HS-DSCH

T1d timer


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HS-DSCH->DCH

DCH->HS-DSCH HS-DSCH->HS-DSCH

T1d timer


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Content



Inter-RAT handover



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Function description

For HSUPA in some cases there is handoverassociated with channel switch


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HS-DSCH/E-DCH->DCH/DCH

DCH/DCH->HS-DSCH/E-DCH

HS-DSCH/E-DCH->HS-DSCH/E-DCH

HS-DSCH/E-DCH->HS-DSCH/DCH

HS-DSCH/DCH->HS-DSCH/E-DCH


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WCDMA P&O a en Handover Control 201012

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