218959020 05 Inter RAT Cell Reselection and Handover 59 Copy

7/25/2019 218959020 05 Inter RAT Cell Reselection and Handover 59 Copy

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Inter-RAT Cell Reselection and

Handover

ZTE University


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WCDMA-GSM/GPRS Inter-RAT Transition

State Diagram


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Content

n Inter-RAT Cell Reselection

n Inter-RAT Handover


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Inter-RAT Cell Reselection Strategy

n In idle mode, cell reselection from WCDMA toGSM/GPRS enables the UE to choose a new cell

in another system to camp on, ensuring service

availability when WCDMA coverage deteriorates.

n Cell reselection from GSM/GPRS to WCDMAallows the UE to return to WCDMA, where it can

access more advanced services.

n Cell Reselection is always used to return to

WCDMA, which has higher priority.


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Inter-RAT Cell Reselection Procedure

n It consists of three steps:l 1. Measuring serving cell and the neighbor cells on

current system and other system.

l 2. Ranking the measured cells.

l

3. Determining reselection.


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3G2G Cell Reselection Procedure


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3G2G Cell Reselection Procedure -

Measurement

n When the UE is camping on a 3G cell, inter-RAT cell reselectionmeasurement is triggered by measurement rule

n Qqualmeas represents measured quality of serving cell, typically CPICH

Ec/No. Qqualmin, SsearchRAT are the parameters broadcast by UTRAN assystem information. Qqualmin indicates the cells minimum required

quality value which fulfills the cell selection suitability criterion.

SsearchRAT indicates the threshold to trigger the measurement for inter-

RAT cell reselection.

n If SsearchRAT is not broadcast, the UE will perform inter-RAT neighbor

cell quality measurement. Whether to broadcast SsearchRAT or not is

controlled by the parameter OtherRATInfoPre.n To estimate the quality of the GSM/GPRS cells, GSM Broadcast

Control Channel (BCCH) carrier measurements are collected in

terms of Received signal Level Averaged (RLA).


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3G2G Cell Reselection Procedure !

Ranking

n After measurement, it will rank all the measured cells, accordingto the following ranking criteria:

Serving cell: Rs = Qmeas,s + Qhyst1s

Neighbor cell: Rn = Qmeas,n Qoffset1s,nn Qmeas,s represents the measured signal quantity of serving cell,

typically CPICH RSCP of the WCDMA.

n Qmeas,n represents the measured signal quantity of neighbor cell.

n Qhyst1s indicates the hysteresis value for FDD cells when the

measurement quantity for cell reselection is CPICH RSCP.

n Qoffset1s,n indicates the offset between the serving cell and

neighbor cell when measurement quantity is CPICH RSCP.


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3G2G Cell Reselection Procedure !

Determination

n If a 2G cell ranks higher than any 3G cell for Treselectionseconds, the UE reselects to that 2G cell. This implies it

being at least (Qhyst1s + Qoffset1s,n) better than the 3G

serving cell, and better than any other 3G measured cell

for Treselection seconds:

Rn(GSM) > Rs(WCDMA) and Rxlev(GSM) > Qrxlevmin

Qrxlevmin indicates the cells minimum required Rx level

value which fulfills the cell selection suitability criterion.


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Inter-RAT Cell Reselection Sample


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3G2G Cell Reselection Key Parameter List

The parameter indicates the hysteresis value for FDD cells when

the measurement quantity for cell reselection is CPICH RSCP.Qhyst1s

The parameter indicates the threshold to trigger the

measurement for inter-RAT cell reselection.SSearchRat

The parameter indicates the cells minimum required Rx level

value which fulfills the cell selection suitability criterion. The

measured cell whose CPICH RSCP or Rx level is lower thanQrxlevmin cannot be selected.

Qrxlevmin

This parameter indicates the cell reselection timer value.Treselection

The parameter indicates the offset between the serving cell and

neighbor cell when measurement quantity is CPICH RSCP.Qoffset1s,n

The parameter indicates the cells minimum required quality

value which fulfills the cell selection suitability criterion. The

measured cell whose CPICH Ec/No is lower than Qqualmin

cannot be selected.

Qqualmin

ExplanationParameter


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3G2G Cell Reselection Key Parameter

1: CPICH Ec/NoDefault Value

Parameter name Measurement Quantity for Cell Selection and Reselection

Abbreviated name QualMeas

DescriptionThis parameter indicates the measurement quantity for cell

selection and reselection.

Range and Step 1: CPICH Ec/No

2: CPICH RSCP

Unit N/A

OMCR Path View->Configuration Management->RNC NE->RNC Radio

Resource Management->UtranCell->UtranCellXX->CellSelection and Reselection-> Cell Selection and

ReselectionX-> Modify Advanced Parameter->

Measurement Quantity for Cell Selection and Reselection


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-18 dBDefault Value

Parameter name QqualminAbbreviated name QQualMin

Description This parameter indicates the cells minimum required quality value

which fulfills the cell selection suitability criterion.

If value of the parameter is increased, its harder for the cell to

satisfy the condition of being selected.

If value of the parameter is decreased, its easier for the cell to


Range and Step [-24, 0]dB; Step 1 dB

Unit dB


Resource Management->UtranCell->UtranCellXX->Cell Selectionand Reselection-> Cell Selection and ReselectionX-> Modify

Advanced Parameter-> Qqualmin(dB)


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-115 dBmDefault Value

Parameter name Qrxlevmin

Abbreviated name QRxLevMin

Description This parameter indicates the minimum required received level of

the cell which satisfies the condition of being selected or reselected

by UE. When the measurement quantity is CPICH RSCP, only the

measured received power level of the cell is larger than Qrxlevmin

can the cell be selected.

If value of the parameter is increased, its harder for the cell tosatisfy the condition of being selected.

If value of the parameter is decreased, its easier for the cell to


Range and Step [-115, -25]dBm; Step 2 dBm

Unit dBm


Resource Management->UtranCell->UtranCellXX->Cell Selection

and Reselection-> Cell Selection and ReselectionX-> Modify

Advanced Parameter->Qrxlevmin(dBm)


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2 dBDefault Value

Parameter name S-search,RAT

Abbreviated name SSearchRat

Description This parameter indicates the inter-RAT measurement triggeringthreshold for cell reselection used by UE to judge whether inter-RAT measurement should be performed. If the quality of servingcell exceeds Ssearch,RAT, UE does not perform inter-RATmeasurement; if the quality of serving cell is not larger thanSsearch,RAT or if Ssearch,RAT is not configured, UE performsinter-RAT measurement.

When Ssearch,RAT is delivered to the UE, if its value is increased,its easier for the UE to trigger inter-RAT measurement.If value of the parameter is decreased, its harder for the UE totrigger inter-RAT measurement.

Range and Step [0, 20]dB; Step 2 dB

Unit dB

OMCR Path Configuration Management->RNC NE->RNC Radio Resource

Management->UtranCell->UtranCellXX->Cell Selection andReselection-> Cell Selection and ReselectionX-> Modify AdvancedParameter-> S-search,RAT(dB)


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1: TrueDefault Value

Parameter name Other RAT Information Configuration Tag

Abbreviated name OtherRATInfoPre

Description This parameter is a switch indicating whether inter-RAT informationparameters used for cell reselection are configured or not. If thevalue is False, inter-RAT information parameters are notconfigured to UE, and UE performs the inter-RAT measurementperiodically according to the period indicated by the parameterTreselections. If the value is True, inter-RAT informationparameters are configured to UE, and UE judges whether to

perform the inter-RAT measurement.Range and Step 0: False

1: True

Unit N/A

OMCR Path View->Configuration Management->RNC NE->RNC RadioResource Management->UtranCell->UtranCellXX->Cell Selection

and Reselection-> Cell Selection and ReselectionX-> ModifyAdvanced Parameter-> Other RAT Infor Configuration Tag


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2 dBDefault Value

Parameter name Qhyst1-s

Abbreviated name QHyst1S

Description This parameter indicates the hysteresis value for FDD cells

in case the quality measure for cell selection and

reselection is set to CPICH RSCP. In cell-ranking criterion

R of cell reselection, the R value of serving cell equals to

the measured value plus the hysteresis value.

Range and Step[0, 40]dB; Step2 dB

Unit dB

OMCR Path View->Configuration Management->RNC NE->RNC RadioResource Management->UtranCell->UtranCellXX->Cell

Selection and Reselection-> Cell Selection and

ReselectionX-> Modify Advanced Parameter-> Qhyst1-s(dB)


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0 dBDefault Value

Parameter name Qoffset1s,n in SIB11

Abbreviated name Qoffset1SNSib11

Description This parameter indicates the quality offset of the servicecell and neighboring cell when the measurement quantity isCPICH RSCP. This parameter is required when queuescells in the cell reselection rule. This parameter isbroadcast to UE in SIB11.If value of the parameter is increased, its harder for the

neighboring cell to satisfy the condition of being selected.If value of the parameter is decreased, its easier for theneighboring cell to satisfy the condition of being selected

Range and Step OMCR: [-50, 50]dBRNC: D=P+50, [0, 100]

Unit dB

OMCR Path View->Configuration Management->RNC NE->RNC RadioResource Management->UltranCell->UltranCellXXX->Neighbouring Cell -> Advanced Parameter Manager->Qoffset1s,n in SIB11(dB)


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1sDefault Value

Parameter name Treselection

Abbreviated

name

Treselection

Description This parameter indicates the cell reselection timer

value. UE shall reselect the new cell if the new cell is

better ranked than the serving cell according to the cell-

ranking criterion R during a time interval indicated by

Treselections.

Range and Step[0, 31]s; step 1s

Unit s

OMCR Path View->Configuration Management->RNC NE->RNCRadio Resource Management->UltranCell->

UtranCellXX->Cell Selection and Reselection-> Cell

Selection and ReselectionX-> Treselection(s)


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2G3G Cell Reselection Procedure


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2G3G Cell Reselection Key Parameter List

0(- !)Applies an offset to RLA for WCDMA cell

reselectionFDD_Qoffset

Value for 3G

higher priority

strategy

ExplanationParameter

7(always)Qsearch_I indicates whether inter-RAT

measurements shall be performed when RLA

of the serving cell is below or above the

threshold.

Qsearch_I

7( -13 dB)Minimum CPICH Ec/No threshold for WCDMA

cell reselection

FDD_Qmin


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0(-20 dB)Default Value

N/AUnit

0, 1, 2, 3, 4, 5, 6, 7

0~7 stands for (!20+n) dB respectively

Range and

Step

The parameter indicates the Minimum CPICH Ec/No threshold

for WCDMA cellDescription

FDD_QminAbbreviated

name

FDD_QminParametername


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8(0 dB)Default Value

N/AUnit

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15

0=-!(always select a cell if acceptable)

1 ~ 15 corresponding to -28 ~ 28dB with step 4dB

Range and

Step

The parameter indicates an offset to RLA for WCDMA

cell reselectionDescription

FDD_QoffsetAbbreviated

name

FDD_QoffsetParametername


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15Default Value

N/AUnit

0. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15

l 0 ~ 6: L= -98+n*4 dbm

l 7: always

l 8 ~ 14: L= -78+4*(n-8)dbm

l 15: never

Range and

Step

The parameter indicates whether inter-RAT measurements

shall be performed when RLA of the serving cell is below or

above the threshold.

Description

Qsearch_IAbbreviated

name

Qsearch_IParametername


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Content

n Inter-RAT Cell Reselection

n Inter-RAT Handover


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Inter-RAT Handover Strategy

n Inter-RAT handover is used in connected mode to maintainthe required quality and guarantee service continuity when

WCDMA coverage deteriorates.

n Inter-RAT handover is a hard handover, usually based on

UE measurements. The UTRAN instructs UE to monitor

the quality of the current cell and system and, if quality fallsbelow a specified threshold, to monitor the signal strength

of the other system.

n Besides, inter-RAT handover can be blind handover based

on shared coverage. No measurement is made on the

target system and the target cell is retrieved from systeminformation broadcast.


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Inter-RAT Handover Strategy

n The inter-RAT handover procedure depends on the UEsdomain. In CS domain, WCDMA implements a seamless

inter-system hard handover. In PS domain, the procedure

is based on a cell reselection process that cannot maintain

the QoS.

n For voice services in CS domain, inter-RAT handover inthe 3G-to-2G direction has higher priority because good

GSM coverage is assumed, and normally no need to

return to WCDMA. The UE reselects back to WCDMA after

the call is released. This avoids unnecessary inter-RAT

handovers, which can increase the risk of dropped calls.


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3G2G Handover Procedure(CS Domain)

n It consists of three steps:l 1. Setup measurements in UTRAN.

l 2. Start compressed mode and perform GSM

measurements.

l 3. Execute the Inter-RAT handover.


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3G2G Handover Procedure(CS Calls)


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Inter-RAT Handover Procedure(PS Domain)

n It consists of three steps:l 1. Setup measurements in UTRAN.

l 2. Perform measurements on GSM/GPRS.

l 3. Execute the inter-RAT cell change order.

n The measurements of Inter-RAT handover for PScalls and CS calls are the same; however, the

handover execution procedure is different.


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3G2G Handover Procedure(PS Calls)


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Event Triggered Measurement and Handover

n

The measured quantity can be CPICH Ec/No or RSCP.The specific parameter used is controlled by theNonIntraMeasQuan parameter. The measured quantity ofInter-RAT measurement depends on the systems to bemeasured. For the GSM/GPRS, the measured quantity isRSSI.

n ZTE UMTS supports event 3a, 3c for inter-RAT handover.And uses event 2d, 2f as the criteria for evaluating thesignal quality of the current frequency. If the UE reports 2devent, which means the current carrier is in poor signalquality, and no inter-frequency neighboring cells exist, orthe UE reports a 2e event after inter-frequencymeasurement is started (which means the signal quality of

the measured inter-frequency neighboring cell is also poor),the RNC tries to initiate Inter-RAT blind handover or startInter-RAT measurement 3a or 3c event.


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Condition to trigger Event 2d

n Event 2D: The quality of working carrier frequency is

lower than a threshold.

n QUsed

: Refers to the measurement result of current

working carrier frequency.

n TUsed 2d

: Refers to the absolute threshold

(ThreshUsedFreq) of poor quality of working carrier

frequency in Event 2D decision.

n H2d

: Refers to handover decision hysteresis

parameter (Hysteresis(Inter)) of Event 2D.

/2HTQ 2d2dUsedUsed


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Condition to trigger Event 2e

n Event 2E: The quality of non-working carrier

frequency is lower than a threshold.

n QNon used

: Refers to the measurement result of

current non-working carrier frequency.

n TNon used 2e


(ThreshNoUsedFreq) of good quality of non-working

carrier frequency in Event 2E decision.

n H2e


parameter (Hysteresis) of Event 2E.

/2HTQ 2e2eusedNonusedNon


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Condition to trigger Event 2f

n Event 2F: The quality of working carrier frequency is

higher than a threshold.

n QUsed

: Refers to the measurement result of current

working carrier frequency.

n TUsed 2f


(ThreshUsedFreq) of poor quality of working carrier

frequency in Event 2F decision.

n H2f


parameter (Hysteresis(Inter)) of Event 2F

/2HTQ 2f2fUsedUsed +


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UTRAN Measurement

n QUTRAN

:indicates the measurement result of the currently used

UTRAN frequency (dB for Ec/No; dBm for RSCP).

n MUTRAN

: indicates the measured physical value of the currently

used UTRAN frequency (ratio for Ec/No; mV for RSCP).

n Mi : indicates the measured physical value of cell I in the currentactive set.

n NA

: indicates the number of the cells (excluding best cells) in an

active set.

n MBest

: indicates the measurement result of the best cells in an

active set.

n W: indicates the weight of the best cells in an active set in thefrequency quality evaluation of the currently used UTRAN.

Best

N

1i

iUTRANUTRAN LogM10W)(1MLog10WLogM10QA

+

==

=


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Condition to trigger Event 3a

n 3A: The currently used UTRAN carrier quality is lower than a threshold,

and the quality of other radio systems is higher than a threshold. It is

used for decision of Inter-RAT handover.

n QUsed

:indicates the estimated quality of the used frequency of the

UTRAN.

n TUsed:indicates the absolute threshold(Thresh[MAX_RAT_MEAS_EVENT]) of the currently used frequency

difference.

n H3a

: is the hysteresis parameter (Hysteresis[MAX_RAT_MEAS_EVENT]

(Rat)) for 3A event decision.

n MOther RAT

:is the quality measurement result of other systems.

n CIOOther RAT

: is the quality offset of other system cells

(CellIndivOffset(gsmRelation).n T

Other RAT: is the absolute threshold of other systems

(ThreshSys[MAX_RAT_MEAS_EVENT])

/2HTQ 3aUsedUsed /2HTCIOM 3aRATOtherRATOtherRATOther ++and

:


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Condition to trigger Event 3c

n 3C: The quality of other radio systems is higher than a threshold.

It can be used for Inter-RAT handover decision.

n MOther RAT

: the quality measurement result of other systems.

n CIOOther RAT: the quality offset of other system cells(CellIndivOffset(gsmRelation).

n TOther RAT

: the absolute threshold of other systems

(ThreshSys[MAX_RAT_MEAS_EVENT]).

n H3c

: the hysteresis parameter

(Hysteresis[MAX_RAT_MEAS_EVENT] (Rat)) for 3C event

decision.

:

/2HTCIOM 3cRATOtherRATOtherRATOther ++


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Inter-RAT Handover Sample

Time

CPICHRSCP/

RSSI

UMTS Cell

GSM Cell

Reporting

Event 3a

Reporting

Event 2dTrigTime2d TrigTime3a

Perform measurement of

GSM/GPRS neighbor cell

Perform Inter-RAT

handover

ThreshUsedFreq 2d !Hysteresis 2d /2

ThreshSys 3a + Hysteresis 3a /2

Thresh 3a !Hysteresis 3a /2

GSM

UMTS


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Ec_f1

GSM

2D t2F 2D

2F

3A

2D

3A(G)

RSCP

3A(W)


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Ec_f1

GSM

Ec_f2

2D t2F 2D

2F

2E 3A

2D 2E

3A(G)

RSCP

3A(W)


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Intra-RAT Handover Key Parameter List

4dBHystersis 3c

4dBHystersis 3a

-95dBmAbsolute Threshold of the Quality of Other RAT for 3c

-90dBmAbsolute Threshold of the Quality of Other RAT for 3a

0Weight of the UTRAN System for 3a

-95dBmAbsolute Threshold of the Quality of UTRAN Cell for 3a

3a EventTrigger

Inter-RAT Handover Tactic

0Measurement Priority of Neighboring GSM Cell

DefaultValueParameter Name


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Intra-RAT Handover Key Parameter List

NeighborShare Cover Indication

RSCP

UTRAN Measurement Quantity for Inter-frequency and

Inter-RAT Measurements

0dBCell individual offset(gsmRelation)

ReportGSM Carrier RSSI Reporting Indicator

Not ReportUTRAN Quality Estimation Reporting Indicator

RequiredGSM BSIC Verification Required Indicator

3GSM Filter Coefficient(RAT)

3UTRAN Filter Coefficient(RAT)

100msTime To Trigger 3c

100msTime To Trigger 3a

Default ValueParameter Name


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Inter-RAT Handover Parameter

0Default Value (note)

View Configuration Management RNC

NE RNC Radio Resource Management Utran

Cell Utran Cell XXX GSM NeighbouringCell GSM Neighbouring Cell XXX

Measurement Priority of Neighboring GSMCell

OMCR Path

N/AUnit

[0, 2]Range and Step

This parameter indicates the measurement priority

of the neighboring cell. The highest priority is 0, the

lowest priority is 2.

Description

MeasPrioAbbreviated name

Measurement Priority of Neighboring GSM CellParameter name


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0: NeighborDefault Value(note)

View Configuration Management RNC NE RNC

Radio Resource Management

Utran Cell

UtranCell XXX GSM Neighbouring Cell GSMNeighbouring Cell XXX Share Cover Indication

OMCR Path

N/AUnit

0: Neighbor1: Overlap

2: Covers3: Contained in

Range and Step

This parameter describes the neighboring relationshipof the serving cell and Gsm neighboring cell.

Description

GsmShareCoverAbbreviatedname

Share Cover IndicationParameter name


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1: 3A Event TriggerDefault Value

(note)

View Configuration Management RNC NE RNCRadio Resource Management Utran Cell Utran

Cell XXX Modify Advanced Parameter Utran Cell-

>Inter-RAT Handover Tactic

OMCR Path

N/AUnit

0: Algorithm Deciding

1: 3A Event Trigger2: 3C Event Trigger

Range and Step

This parameter indicates the inter-RAT handover

tactic.

Description

RatHoTacticAbbreviated

name

Inter-RAT Handover TacticParameter name


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1: RSCPDefault Value (note)

View Configuration Management RNC NE RNC Radio

Resource Management Utran Cell Utran Cell

XXX Modify Advanced Parameter Utran Cell UTRANMeasurement Quantity for Inter-frequency and Inter-RAT

Measurements

OMCR Path

N/AUnit

0: Ec/No

1: RSCP2: Ec/No and RSCP

Range and Step

This parameter indicates UTRAN measurement quantity

for inter-frequency and inter-RAT measurements.

Description

NonIntraMeasQuanAbbreviated name

UTRAN Measurement Quantity for Inter-frequency andInter-RAT Measurements

Parameter name


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0dBDefault Value (note)

View Configuration Management RNC NE RNCRadio Resource Management GSM Cell GSM CellXXX Modify Advanced Parameter Cell IndividualOffset(dB)

OMCR Path

dBUnit

OMCR: [-10, 10]dB step 0. 5RNC: D= (P+10) *2, [0, 40]

Range and Step

An offset is allocated for each cell being monitored. Theoffset can be positive or negative. Before the UE judgeswhether an event occurs, adds the offset to themeasurement result. If the PCPICH uses a positive offset,the UE sends the measurement report just like PCPICHis x dB better than the actual case. Or, if the PCPICHuses a negative offset, the PCPICH report is limited.When the cell individual offset is used, the correspondingcell is possibly (at least temporarily) the target cell of thehandover or removed from the active set.

Description

CellIndivOffset(gsmRelation)Abbreviated name

Cell individual offset(gsmRelation)Parameter name


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For own system CPICH Ec/No, UE event report parameter: [-6, -24,-

24,-24]

For own system CPICH RSCP, UE event report parameter: [-95, -

115,-115,-115]

Default Value (note)


Resource Management Modify Advanced Parameter UE Inter-

RAT Measurement Configuration Information Absolute Threshold

of the Quality of UTRAN Cell for 3A

OMCR Path

dBm/ dBUnit

CPICH RSCP:[-115, -25] dBm step 1dBmCPICH Ec/No: [-24, 0] dB step 1dB

Range and Step

This parameter indicates the absolute threshold of the UTRAN cell

quality that UE uses to judge event 3a. The range and Unit of the

parameter relate to the measurement quantity of UTRAN system.

MAX_RAT_MEAS_EVENT is the maximum number of inter-RAT

measurement events which takes the value of 4.

Description

Thresh[MAX_RAT_MEAS_EVENT]Abbreviated name

Absolute Threshold of the Quality of UTRAN Cell for 3AParameter name


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For own system CPICH Ec/No, UE event report parameter:[0, -, -, -]For own system CPICH RSCP, UE event report parameter:[0, -, -, -]

Default Value(note)

View Configuration Management RNC NE RNC RadioResource Management Modify Advanced Parameter UEInter-RAT Measurement Configuration Information Weightof the UTRAN System for 3A

OMCR Path

N/AUnit

[0.0, 2.0] step 0.1Range and Step

This parameter is used when judging the quality of theUTRAN system in inter-RAT measurement, which indicatesthe weight of the best cell in the quality judgment (only forevent 3a).MAX_RAT_MEAS_EVENT is the maximum number of inter-RAT measurement events which takes the value of 4.

Description

W[MAX_RAT_MEAS_EVENT]Abbreviated name

Weight of the UTRAN System for 3AParameter name


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[-90, -95, -95, -115]dBmDefault Value (note)

View Configuration Management RNC NE RNC RadioResource Management Modify Advanced Parameter UEInter-RAT Measurement Configuration Information AbsoluteThreshold of the Quality of Other RAT for 3A/3B/3C

OMCR Path

dBm/ dBUnit

CPICH RSCP: [-115, -25]dBm step 1dBmCPICH Ec/No: [-24, 0] dB step 1dB

Range and Step

This parameter indicates the absolute threshold used whenjudging the quality of other RAT configured for event 3a/3b/3c.The value range and Unit of this parameter are related to themeasurement quantity of other system, at present themeasurement quantity can only be GSM Carrier RSSI of theGSM system, which corresponds to the CPICH RSCP of

UTRAN system, so the value range and Unit of this parametercorrespond to the CPICH RSCP.MAX_RAT_MEAS_EVENT is the maximum number of inter-RAT measurement events which takes the value of 4.

Description

ThreshSys[MAX_RAT_MEAS_EVENT]Abbreviated name

Absolute Threshold of the Quality of Other RAT for

3A/3B/3C

Parameter name


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For own system CPICH Ec/No, UE event report parameter:[4,4,2,4]dB

For own system CPICH RSCP, UE event report parameter:[4,4,4,4]dB


View Configuration Management RNC NE RNC RadioResource Management Modify Advanced Parameter UE Inter-RAT Measurement Configuration Information Hysteresis

OMCR Path

dBUnit

(0, ", 7.5)dB step 0.5dBRange and Step

This parameter indicates the hysteresis used when judging whetherto trigger the event. This parameter makes it different between thestatus to trigger an event and the status to leave the event, so as toavoid the trigger status change due to very small change.The larger the value is, the larger the difference between the statusto trigger the event and the status to leave the event will be.This parameter is related to the measurement quantity and theevent type.

Different events are configured separately and can be configuredwith different hysteresisMAX_RAT_MEAS_EVENT is the maximum number of inter-RATmeasurement events which takes the value of 4.

Description

Hysteresis[MAX_RAT_MEAS_EVENT]Abbreviated name

Hystersis(dB)Parameter name


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For own system CPICH Ec/No, UE event report parameter:[100,100,100,100]msFor own system CPICH RSCP, UE event report parameter:

[100,100,100,100]ms

Default Value(note)

View Configuration Management RNC NE RNC Radio ResourceManagement Modify Advanced Parameter UE Inter-RATMeasurement Configuration Information Time to Trigger

OMCR Path

MsUnit

(0, 10, 20, 40, 60, 80, 100, 120, 160, 200, 240, 320, 640,1280, 2560, 5000)ms

Range and Step

This parameter indicates the time difference between having detectedthe event generation and reporting the event. Only when the eventgeneration is detected and still meets all requirements of eventtriggering after Time to trigger, the event can be triggered andreported. The larger the value is, the stricter the judgment is for theevent to be triggered. The parameter should be set according to theactual requirements. Sometimes, if it is set too large, the quality ofcalls may decrease.

MAX_RAT_MEAS_EVENT is the maximum number of inter-RATmeasurement events which takes the value of 4.

Description

TrigTime[MAX_RAT_MEAS_EVENT]Abbreviated name

Time To Trigger(ms)Parameter name


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UE Event Report Parameters for Own System CPICHEc/No: 3UE Event Report Parameters for Own System CPICHRSCP: 3

Default Value(note)

View Configuration Management RNC NE RNCRadio Resource Management Modify AdvancedParameter UE Inter-Rat MesurementConfiguration UTRAN Filter Coefficient

OMCR Path

N/AUnit(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 15, 17, 19)Range and Step

This parameter indicates the filtering factor of UTRANwhen UE performs the L3 filtering on themeasurement results of the inter-RAT measurement.

Description

FilterCoeff(Rat)Abbreviatedname

UTRAN Filter Coefficient(Rat)Parameter name


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For own system CPICH Ec/No, UE event report parameter: 3

For own system CPICH RSCP, UE event report parameter: 3

Default Value

(note)


Resource Management Modify Advanced Parameter UEInter-Rat Mesurement Configuration GSM Filter Coefficient

OMCR Path

N/AUnit

(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 15, 17, 19)Range and Step

This parameter indicates the filtering factor of GSM when UE

performs the L3 filtering on the measurement results of the

inter-RAT measurement.

Description

GsmFilterCoeffAbbreviated name

GSM Filter Coefficient(Rat)Parameter name


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UE Event Report Parameters for Own System CPICH Ec/No:RequiredUE Event Report Parameters for Own System CPICH RSCP:

Required


View Configuration Management RNC NE RNC RadioResource Management Modify Advanced Parameter UE Inter-Rat Mesurement Configuration GSM BSIC Verification RequiredIndicatior

OMCR Path

N/AUnit

0: Require Confirm1: Not Required Confirm

Range and Step

This parameter indicates whether to confirm the BSIC of GSM cellswhen performing the Inter-RAT measurement. BSIC = NCC(Network Color Code) + BCC (Base Color Code). BSIC can beused to identify the GSM cells. If the value is #Not Required #, UEdoes not confirm the BSIC when measuring the GSM cells. If thevalue is #Required #, UE confirms the BSIC when measuring theGSM cells, and then queue the confirmed BSIC cells according tothe measurement results. In each measurement period, re-confirm

and measure the BSIC in the order of the measurement results,from good to bad.

Description

BSICVeriReqAbbreviated name

GSM BSIC Verification Required IndicatiorParameter name


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For own system CPICH Ec/No, UE event report parameter:

Not Report

For own system CPICH RSCP, UE event report parameter:

Not Report

Default Value

(note)


Resource Management Modify Advanced Parameter UE

Inter-Rat Mesurement Configuration UTRAN Quality

Estimation Reporting Indicator

OMCR Path

N/AUnit

0: Not Report (False)

1: Report (True)

Range and Step

This parameter indicates whether the report of the

estimation quality of UTRAN system is requested or not.

Description

UtranEstQualAbbreviated name

UTRAN Quality Estimation Reporting IndicatorParameter name


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For own system CPICH Ec/No, UE event report parameter:ReportFor own system CPICH RSCP, UE event report parameter:Report

Default Value(note)

View Configuration Management RNC NE RNC RadioResource Management Modify Advanced Parameter UEInter-Rat Mesurement Configuration GSM Carrier RSSIReporting Indicator

OMCR Path

N/AUnit

0: Not Report (False)1: Report (True)

Range and Step

This parameter indicates whether the report of RSSI of theGSM cells is requested or not. Since the measurementquantity of the GSM cell is only GSM Carrier RSSI, in inter-RAT measurement Event Reporting Criteria, there is noneed to report this parameter when measuring the GSM celland performing the Inter-RAT handover. In the periodicalreporting criteria, GSM carrier RSSI report is required.

Description

GsmCarrRSSIIndAbbreviated name

GSM Carrier RSSI Reporting IndicatorParameter name


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Documents

218959020 05 Inter RAT Cell Reselection and Handover 59 Copy