4wcdma ran14 radio net fea alg tr1 ho2

7/29/2019 4wcdma Ran14 Radio Net Fea Alg Tr1 Ho2

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WCDMA Handover Aigorithm and Parameters

(Contents2. Inter-Frequency Handover

1. nter-Freqency Handover O\.ervew2. tnter-Frequency Hanciover Measurement

1 tnter-Frequency Handover Measurement Switches2. lnter-Frequency Handover Measurement Report Modes3 Intr-Freqiency Hndover Measurement Everts4 InsrFreouency Hndoer Meeurement Qunntty5. hfterFreqJeny Hardover Compressed Mode3. 1nterFrequency Handover Decision nd Execution

4. Signaiing Procedures for nter-Frequency Handover

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WCDMA Handover Algorithm and Parameters

Inter-Frequency HandoverMeasurement Report Modese Event-triggered measurement report mode

D UE test the In ter-frequ ency neighbor RSCP and Ec/No Periodical measurement report mode

D UE test the Inter-frequency neighbor RSCP and Ec/No, andcurrent ceil Ec/No or RSCP

InterFreqRepartModeD Parameter name: Inter-frequency measure report modeD Recommended value: Pe riodicat rep orting

Periodical measurement report modeThe advantage of periodicat measurement report is that if the handoverfalis, the RNC reattempts the handover to the same celi after receivingthe pe riodical measurement report from the tiE . This increases theprob ability of the success of inter-frequency handover.Based on the measurement control message received from the RNC, theUE periodicaliy report s the measurementquality ofthetargetceH. Then,based on the measurement report, the RNC makes the handoverdecision and performs handover.

InterFreqRepo-tModeD Content: This parameter specifies the nter-frequency rneasurement report mode.D Vaue range: PERO DICAL_REPORT ING(Periodical reporting),EVENT_TR GGER(E vent trigger)D Physical valu e range : Per iod ica l reporting, Eventtrigger

Set this parameters through ADD UCELIJNTERFREQHOCOVI MODUCELLINTERFREQHOCOV/ SET Ul NTERFREOHOCOV.

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WCDMA Hardover Algorithm and Parameters

Inter-Frequency HandoverMeasuremeni Report Modes PrdReport!nterval

Parameter name: Irter-frequency measure periodical rpt periodRecommended value: D500, nameiy 500ms

!nterFreqMeasTimeParameter name: Inter-freq measure timer IengthRecommended value: 60, nameiy 60s

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PrdReportlntervalo Content: This parameter specifles the interval of the inter-frequencymeasurement report.o Value range: NONPERlODIC_REPORT(Non periodical reporting), D250, D500,D1000, D2000, D3000, D4000, D6000, D8000, D12000, D16000, D20000,D24000, D28000, D32000, D64000o Physical value range: NON_PERIODIC_REPORT, 250, 500, 1000, 2000, 3000,

4000, 6000, 8000, 12000, 16000, 20000, 24000, 28000, 32000, 64000Physical unit: ms

!nterFreqMeasTimeContent: Timer length for inter-frequency measurement. After inter-frequencymeasurement starts, if no inter-frequency handover is performed when this timerexpires, the inter-frequency measurement and the compressed mode (if started)are stopped. The value 0 indicates the timer is not to be enabled.Value range: 0-512Physical value range: 0-512; step: 1 LJPhysical unit: s

Set these parameters through ADD UCELLINTERFREOHOCOV/ MODUCELLINTERFREQHOCOV/ SET UINTERFREOHOCOV.

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WCDMA Handover Algorfthm and Parameters

Contents2. Inter-Frequency Handover

1. InterFrequency Handover Ov erview2. !nter-Frequency Handover Measurernent

1 Inter-Frequenoy Handover Meas urernent Swit hes2. inter-Frequency Handover Measurernent Report Modes3. lnter-Frequency Handover Measurement Events4. nter-Frequency Handover Measurement Quantity5. hter-Frequency Handov er Compressed Mode

3. Inter-Frequency Handover Decision and Executior4. Signaing Procedures for Inter-Frequency Handover

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WCDMA Handover Aigori thm and Parameters

2D The estimated qua lity of the cu rrent iy used frequency isbelow a certain threshold.2F The estimated quality of the currentiy used frequency is

above a cer tain threshold.2B The estimafed qua! ity of the currentiy used frequency isbel ow a certain threshod and the estimated qua ty of a

non-used frequency is above a certain threshold.

Inter-Frequency HandoverMeasurement EventsMeasurement events involved in inter-frequency handover

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!nter-Frequency HandoverMeasurement Events - 2D2Devent:The estirnated qua iity of the currentiy used frequency is belowe certain threshotd.Event 2D 15 triggered on the basis of the follow ing formula:

0sed Tus2d -H2Where:

use d is the Ec/No or RSCP measurement value of the curren tiyused frequen cyTused9d is Ec/NO or RSCP abs olute threshod for 2D event, thevalues of different serv ice types can be different

Copynght 2012 Huawe Te Ioies Co Lii i nhts served Pe9 I-UAWEI

0sed i the measured qu ality of the used frequency. Tused2d is the absolute quality threshold of the ce il that uses the currentfrequency. Based on the servica type and measurernent quantity, this thresholdcan be configured through one of the fo llow ing parameters:

lnterFreqCSThd2DEcNOInterFreqR99PsThd2DEcNO 6(1InterFreqHThd2DEcNOInterFreqCSThd2DRSCPin terFreqR99PsThd2DRSCP

D InterPreqHThd2DRSCPNote:

The parameter s InterFreqHThd2DRSCP and nterFreqHrhd2DEcNOare vafid oniywhen the switch HO_A LGO_O VERLA Y_SWITCH is set toON. Othe,wise, the PS domain sevices wili takefnterFreqR99PsThd2DEcNO or nterFreqR99PsThd2DRSCP as ameasurement event tresho ld.For the PS and CS combined services, the threshold is set to the higherone of CS or PS services.If the UE has oniy signaling connections curre ntly, the threshotds for CSsevices are used,

H is the event 2D hysteresis value set through the parameter HystFor2D. After the conditions of event 2D are futfilled and maintained until theTimeToTrig2D is reached, the UE sends the event 2D measurement reportmessage. Any of the Ec /No and RSCP measurement resu(t can trigger the 2D event.

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WCDMA Handover Aigorithm and Parameters

2jRifidi \?alInterFreqCSThd2DEcNO -14, nameiy -14dBInterFreqR99PsThd2DEcNO -14, nameiy -14dBInterFreqHThd2DEcNo -14, nameiy -14dBInterFreqCSThd2DRSCP -95, nameiy -95dBmInterFreqR99PsThd2DRSCP -95, nameiy -95d8mInterFreqHThd2DRSCP -95, nameiy -95dBm

InterFreqCSThd2DEcNOD Content: Threshold ta triggerinter-frequencymeasurementwith

measurement quantty of Ec/No for CS domain services.Value range: -24 0Physical vaiue range: -24 0; step: 1PhyscaI unit: dB

!nterFreqR99PsThd2DEcNOD Content: Threshold to trigger inter-frequencymeasurement with

measurement quantity of Ec/No for PS domain non-HSPA services.Value range: -24 0Physical value range: -24 0; step: 1Physical unit: dB

InterFreqHThd2DEcNoContent: Threshold to trigger inter-frequency measurement withmeasurement quantity of Ec/No for PS domain HSPA services.Valuerange:-24 0

D Physical value range: -24 0; step: 1D Physical unit: dB

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Parameters of Inter-FrequencyHandover -2D

Recommended values of TUSCd2d:

-.4, Cor\ 2O2 fuae Toc1ijooqesC L d iII hts rcseved Pae1O d IUAWEI


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WCDMA HandoverAigorithm and Pa rarneters

!nterFreqCSThd2DRSCPConten t: Threshold ta trigger inter4requency measurement withneasurement quan tit y of RSCP for CS domain services.Valu e range: -115--25Phys ica i valu e range: -115---25; step: 1Physic al unit: dBm

InterFreqR99PsThd2DRSCPContent: Threshold ta trigger inter-frequency rneasurement withmeasurement quantity of RSCP for PS domain nonHSPA services.Valuerange: -115- -25Phy sica l vaiue range: -115---25; step: 1Physca unit: dEm

InterFreqHThd2DRSCPCon tent : Threshold ta trigger inter-frequency measurement withmeasurement quantity of RSCP for PS domain HSPA services.Value range: -1 1 5 -25

o Ph ysica l value range: -115--25; step: 1o Physica l unit: dEm

Set these parameters through ADD UCELLINTERFREQHOCOV / MODUCELLINTERFREQH000V SET UINTERFREQHOCOV.

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WCDMA Handover Algorithrn and Parameters

Parameters of Inter-FrequencyHandover - 2D (ConL) HystFor2D

Parameter name: 2D hysteresisRecommended value: 4, nameiy 2dB

TimeToTrig2DParameter name: 2D event trigger delay timeRecommended value: D320, nameiy 320ms

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HystFor2DContent: Hysteresis value for the event 2D. The value of this parametercorreiates with slow fading. The larger the value of this parameter, thesmaller probability of ping-pong effect or wrong decision, but event 2Dmight not be triggered in time.Value range: 0-29Physical value range: 0 14.5; step: 0.5Physical unit: dB

TimeToTrig2DContent: Time delay to trigger event 2D. The value of this parametercorrelates with slow fading. The larger the value of this parameter, theIower probability of incorrect decision, bu t the slower the response ofevent 2D to the change of measured signals. t.Value range: DO , D10, D20, D40 , D60, D80, D100, D120, D160, D200,D240, D320, D640, D1280, D2560, D5000Physical value range: 0, 10 , 20 , 40 , 60 , 80, 100, 120 , 160 , 200, 240, 320,640 , 1280, 2560, 5000Physical unit: ms

Set these parameters through ADD UCELLINTERFREOHOCOV/MODUCELLI NTERFREQHOCOV/SET U 1 NTERFREQHOCOV.


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WCDMA Handov er Algorithm and Parameters

Inter-Frequency HandoverMeasurement Events - 2F2Fevent

The estimated quality of the currentiy used frequency is abovea certain threshold.Event 2F is triggered on the basis of the foiiowing formua:

Where:Quseci Tused2f +H22

used is the Ec/No or RSCP me asureme nt value of the currentiyused frequencyTusedf is EC/NO or RSCP absolute threshod for 2F even t, the

Used is the measured quallty of the used frequency. TUsed2f is the absolute quality threshold of the ce li that uses the current frequency.Based on the service type and measurement quantity, this threshold can beconfigured through one of the following parameters:

!nferFreqCSThd2FEcNoInterFreqR99PsThd2FEcNOInterFreqHThd2FEcNOlnterFreqCSThd2FRSCPin terFreqR99PsThd2FRSCPlnterFreqHThd2FRSCPNote :

The parameters !nterFreqHrhd2FEcNO and lnterFreqHThd2FRSCP arevalid oniy when the switch HO_ALGO_OVERLAY_SW!TCH is set to ON.Othewise, the PS domain serices wil! take InterFreqR99PsThd2FEcNOor InterFreqR99PsThd2FRSCP as e measurement event thresho d. For the PS and CS combined sev ices, the thresho!d is set to the higherone of CS or PS services.

If the UE has on iy signa ing connections currentiy, the thresholds for CSservices are used. H2 is the event 2F hysteresis value set through the parameter HystFor2F. After the conditions of event 2F are futflled and maintained until the parameterTimeToTrig2F i reached, the UE reports the event 2F measurement repor tmessage. Any of Ec/No and RSCP measurement result can trigger the 2F event. Cond iti on s of event 2F are as follows: Tused2d -H2


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InterFreqCSThd2FEcNO -12, nameiy -12dBInterFreqR99PsThd2FEcNO -12, nanely -12dBInterFreqHThd2FEcNO -12, nameiy -12dBInterFreqCSThd2FRSCP -92, namety -92dBmIrterFreqR99PsThd2FRSCP -92, nameiy -92dBmInterFreqFlThd2FRSCP -92, nameiy -92dBm

:1:. !nterFreqCSThd2FEcNO

Content: Threshold to stop inter-frequency measurement withmeasurement quantity of Ec/No for CS domain services.Value range: -24-OPhysicai value range: -24O; step: 1Physical unit: dB

interFreqR99PsThd2FEcNOContent: Threshold ta stop inter-frequency measurement withmeasurement quantity of EcINo for PS domain non-HSPA services.

u Value range: -24-OPhysical vaue range: -24-O; step: 1

D Physical unit: dB InterFreqHThd2FEcNo

D Content: Threshold ta stop inter-frequency measurementwithmeasurement quantity of Ec/No for PS domain HSPA services.Value range: -24--O

D Physical value range: -24--O; step: 1D Physical unit: dB

Parameters of Inter-FrequencyHandover -2FRecommended values of Tused2r:

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WCDMA Handover Algorithm and Par ameters

InterFreqCSThd2FRSCPCo ntent: Threshold to stop inter-frequency measurement withmeasurement quantity of RSCP for CS domain sarvices.Valuerange: -115--25Physical value range: -115--25; step: 1Physica l unit: dBm

InterFreqR99PsTld2FRSCPCon tent: Threshold to stop inter-frequency measurement withmeasurement quantity of RSCP for PS domain non -HSPA services.Valuerange: -115--25Physical value range: -11 5--25; step: 1

o Phys ical unit: dBm lnterFreqHThd2FRSCP

Co ntent: Threshold ta stop inter-frequency measurement withmeasurement quantity of RSCP for P8 domain HSPA services.Va lue range: -115- --2 5Phy sic al value range: -115--25; step: 1Phys ical unit: dBm

Set these parameters through ADD UCELL )NTERFREQHOCOV / MODUCELLI NTERFREQHOCOV/ SET U INTERFREQHOCOV.

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WCDMA Handover Algorthm and Parameters

Parameters of Inter-FrequencyHandover - 2F (ConL) HystFor2F

Parameter name: 2F hysteresisRecommended vatuc: 4, nameiy 2dB

TimeToTrig2FParameter name: 2F event trigger detay timeRecommended value: D1280, nameiy 1280ms

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Content: Hysteresis vatue fo r the event 2F . The value of this parametercorrelates with slow fading. Th e larger the vaiue of this parameter, thesmatler probability of ping-pong effect or wrong decision, but event 2Fmight not be triggered in time.Vatue range: 0-29Physical value range: 0-14.5; step: 0.5

o Physical unit: dBTimeToTrig2F

Content: Time detay to trigger the event 2F. The value of this parametercorrelates with slow fading. The larger the value of this parameter, thelower probability of incorrect clecision, bu t the siower the response ofevent 2F to the change of neasured sigrals.Value range: DO, Db, D20, D40, D60 , D80, D100, D120, D160, D200, iiD240, D320, D640, Db 280, D2560, D5000Physical vatue range: 0, 10, 20, 40 , 60, 80, 100, 120 , 160 , 200, 240, 320,640, 1280, 2560, 5000Physical unit: ms

Set these parameters through ADD UCELLINTERFREOHOCOV/ MODUCELLINTERFREQHOCOV/ SET UINTERFREQHOCOV.

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WCDMA Handover Algorithm and Pararneters

Inter-Frequency HandoverMeasurement Events - 28

2Bevent:n The estimated quai ity of the currentiy used frequency is belo w

a certain threshold and the estirnated quality of a non-usedfrequency is above a certain thresholdEvent 28 is triggered on the basis of the following formula :

S> NOUSe I TN oU sed2b +H/

Tcj, - H,b/1 3

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Ncused is the mea sure d qual lty of the ceH that use s the oth er fre quencies . Used s the measured quality of the used frequency.H2b is the event 2B hysteresis value set through the parameter HystFor2B.TNoused2b is the absoiute quality threshoid of the celi that uses the otherfrequencies. Based on the service type and measurement quantity, thisthreshold can be configured thraugh one of the following parameters:

TargefFreqCsThdEcNOTargetFreqR99PsThdEcNOTargetFreqHThdEcNOTargetFregCsThdRscpTargetFreqR99PsThdRscpTargetFreqHThdRscpNote:

The parameters TargetFreqHrhdEcNo, TargetFreqHThdRscp,UsedFreqHThdRSCP, and UsedFreqHThdEcNO are valid only whenthe swit ch HO_ALGO OVERLAYSW ITC I- is set to ON. Otherwise , thePS domain R99 services take UsedFregR99PsThdEcNO,UsedFreqR99Ps Th dR SC P, TargetFreqR99PsThdEcN , orTargetFreqR99PsThdRscp as a measurement event threshold. For the PS and CS com bined services, the threshold is set ta the higherona of CS or PS services. If the UE has oniy sig na ling connectiors currently, the thresholds for CSservices ara used.

e TUsed2b is the absolute quality threshold of the ceU that uses the currentfrequency. After the conditions of event 28 are fulfilled and maintained until the parameter

Time ToTr!g2B is reached, the UE reports the eve nt 2B measurement reportmessage.Confid entia l Information of Hu awe i. Na Spreading Witho ut Permission


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Tused2b is set in the foIowing way: Based on the service type and measurement quantity, this threshold can be

configured through one of the following parameters: If event 2 D w it h the CPICH RSCP value is received by the RNC:

Tu of event 2B with the CPICH RSCP value can be :LIsedFreqCSThdRSCPUsedFreqR99PsThdRSCPUsedFreqHThdRSCP

Ts of event 2B with the CPICH Ec/No value is configured as themaximum value 0dB.According to 3GPP specifications, Tused2b of event 2B with the CPICH Ec/Novalue should be configured as the maxirnum vaue 0dB. If the event 2F withthe CPICH Ec/No vaiue is received by the RN C and Tused2b of event 2B withthe CPICH Ec/No value is modified, TUSed2b is reset to 0dB.

If event 2 D w it h the CPICH Ec/No vaue is received by the RNC:of event 2B with the CPICH Ec/No value can be: tUsedFreqCSThdEcNUsedFreqR99PsThdEcNOUsedFreqHThdEcNOof event 2B with the CPICH RSCP value is configured as themaxirnum value 25 dBm.

According to 3GPP specification, TUsed2b of event 2B with the CPICH RSCPvalue should be configured as the maximum value -25dBm. If event 2F withthe CPICH RSCP value is received by the RNC and Tused2b of event 2B withthe CPICH RSCP value is modified, TUsej S reset ta -25 dBm. ,(

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Parameters of Inter-FrequencyHandover - 2BRecommended values of TNouse d2b:

TargetFreqCsThdEcNO -12, nameiy -12dBTargetFreqR99PsThdEcN0 -12 , nam eiy -12dBTarg etF reqHT hdEcNo -12 , nam eiy -12 dBTargetFreqCsThdRscp -92, nam eiy -92dBmTargetFreqR99PsThdRscp -92, nameiy -92dBmTargetFreqHThdRscp -92, nameiy -92d8m

TargetFreqCsThdEcNOContent: Threshold of the target frequency for triggering inter-frequencymeasurementwith measurement quantity of Ec /No for CS domainservices.Valu e range: -24 0Phys ical value range: -24 0; step: 1Phys ical unit: dB

TargetFreqR99PsThdEcNContent : Threshold of the target frequency for trig ge ring inter-frequencymeasurementwith measurement quantity of EcNo for PS domain nonHSPA services.Value range: -24 0Physica l value range: -24 0; step: 1Physical unit: dB

TargetFreqHThdEcNOCon tent: Threshold of the target frequency for trigg ering inter-frequencymeasurement with measurement quantity of EcfNo for PS domain HSPAservices.Value range: -24 0Physic al value range: -24 0; step: 1Physical unit: dB

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WCDMA Handover Algorithm and ParametersTargetFreqCs ThdRscp

Content: Threshold of the target frequency for triggering inter-frequencymeasurement with measurenert quantity of RSCP for CS domainservices.VaIuerange:-115--25Physical value range: -1 15 -25; step: 1Physica unit: dBm

TargetFreqR99PsThdRscpContent: Threshold of the target frequency for triggering inter-frequencymeasurement with measurement quantity of RSCP for PS domain nonHSPA services.Valuerange:-115--25Physical value range: -1 15 -25 step: 1Physical unit: dBm

TargetFreqHThdRscpContent: Threshold of the target frequency for trgering inter-frequencymeasurement with measurement quantity of RSCP for PS domain HSPAservices.Vaue range: 115--25Physical value range: -115---25; step: 1Physical unit: dBm

Set these parameters through ADD UCELLINTERFREQHOCOV/ MODUCELIJ NTERFREQHOCOV/ SET U 1 NTERFREQHOCOV.

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WC DMA Handover Algorithm and Parameters

Parameters of Inter-FrequencyHandover - 2B (conj)

Recommended values of TU sed2b

lJsedFreqCSThdEcNO -12 , nameiy -12dBUsedF reqR9GPsThdEcNO -12 , nameiy -12dBUsedFreqHThdEcNo -12 , nameiy -12dBUsedFreqCSThdRSCP -92, name iy -92dBmUsedFreqR99PsThd RSCP -92 , n ameiy -92 dBmUsedFreqHThdRSCP -92, name iy - 92dBm

o Conten t: Threshold of used frequency quality for triggering interfrequency measurement with measurement quantity of Ec/No fo rC Sdomain services.Va lue range: -24 0Phys ica l value range: -24 0; step: 1Physical unit: dB

UsedFreqRQQPsThdEcNO Content: Threshold of used frequency quaity for triggering interfrequency measurernentwith measurement quantity of Ec/No for PSdomain non-HSPA services.Value range: -24-0Physical value range: -24-0; step: 1

Con ten t: Threshold of used frequency qua lity for triggerng interfrequency measurement with measurement quantity of Ec!No fo r PSdomain HSPA services.

Vaue range: -24 0Physica l value range: -24 0; step: 1

o Phys ical unit: dB

UsedFreqCSThdEcNO

Physical unit: dB UsedFreqHThdEcNO

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WCDMA Handover Algorithrn and Parameters

Parameters of Inter-FrequencyHandover - 2B (conf) Recommended values of TUsed2b:, F4(Parametez r RecommendedVaIue. LY ..-

UsedFreqCSThdEcNO -12, nameiy -12dBUsedFreqR99PsThdEcNO -12 , nameiy -12dBUsedFreqHThdEcNO -12, nameiy -12dBUsedFreqCSThdRSCP -92, nameiy -92dBmUsedFreqR99PsThdRSCP -92, namey -92dBmUsedFreqHThdRSCP -92, nam eiy -92dBm

Content: Threshold of used frequency quality for triggering interfrequency measurement with measurement quantity of RSCP for CSdomain services.Value range: -115--25Physical vaiue range: -115 -25; step: 1Physical unit: dBm

UsedFreqR99PsThdRSCPContent: Threshold of used frequency quality for tri gg ering interfrequency measurement with measurement quantity of RSCP for PSdomain non-HSPA services.

D Value range: -1l5--25D Physical value range: -1.15--25; step: 1D Physical unit: dBm

UsedFreqHThdRSCPD Content: Threshold of used frequency quality for tr iggering inter

frequency measurementwith measurement quantity of Ec /N o for PSdomain HSPA services.

D Value range: -115- -25Physical value range: -115 -25; step: 1

D Physical un it : dBm Set these parameters through ADD UCELLINTERFREQHOCOV/ MODUCELLINTERFREQHOCOV/ SET UINTERFREQHOCOV.


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WCDMA Handove r Algorithm and Parameters

Parameters of Inter-FrequencyHandover -2B (ConL)HystFor2BParameter name: 2B hysteresisRecommended value: 4, namely 2dB

TimeToTrig2Bo Parameter nam e: 2B event trigger detay tim eRecommended valu e: DO , nameiy Oms

Content: Hysteresis value for the event 2B. The value of this parametercorrelates with slow fading. The larger the value of this parameter, thestrongerthe capab ility of resisting sig na l fluc tua tion. Thus, the ping-pongeffect can be resisted, but the speed of the handover alg orithm torespond to signal change becomes Iower, and therefore event 2B migh tnot be triggered in time.Value range: 0 29Physical value range: 0 14.5; step: 0.5Physical unit: dB

TimeToTrig2BContent: Time detay to trigger event 2B. The value of this parametercorrelates with slow fad ing. The larger the value of th is parameter, theIower probability of incorrect decision, but the slower the response ofevent 2B ta the change of measured signals.Value range: DO, Db, D20, D40, D60, D80, D100, D120, D160, D200 ,D240 , D320, D640, D1280, D2560, D5000Physical value range: 0, 10, 20, 40, 60, 80, 100, 120, 160, 200 , 240, 320,640, 1280, 2560, 5000

o Physical urit: ms Set these parameters through ADD UCELL INTERFREQHOCOVI MODUCELLINTERFREQHOCOV/ SET UINTERFREQHOCOV.

HystFor2B

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WCDMA Handover Aigarithm and Param eters

Parameters of Inter-FrequencyHandover - Common.cIo r

Parameter name: CeI oriented Celi Individuaf OffsetRecommended value: 0, nameiy 0dB

ClOOffsetParameter name: Neighboring celi oriented CaRecommended value: 0, nameiy 0dB

.coContent: This pararneterworks with the Neighboring ce!! orlented CIO. it ris used for intra- or inter-frequency handover decisions. The larger thesum, the hfgher the handover priority of the neighboring celi. The smallerthe sum, the lower the handover priority of the neighboring ceil, Usualiy itis configured to 0.

o Value range: -20 20Physical value range: -10 10; step: 0.5Physical unit: dBSet this parameterthrough ADD UCELLSETUP/MOD UCELLSETUP.

ClOOffsetContent: This parameter defines the neighboring ceil oriented ceilindividual offset. The set value functions in combination of the ce!Iorlented C!O. Their sum is added to the measurement quantity beforethe UE evaluates whether an event has occurred. n handover algorithms,this parameter is used for moving the border of a ceil.Value range: -20 20Physical value range: -20 20; step: 1Physical unit: dB (Set this parameter through ADD UINTERFREQNCELL/MODUINTERFREONCELL.Confidential Information of Huawei. No Spreading Without Permission


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WCDMA Han dover Algorithm and Parameters

Parameters of Inter-FrequencyHandover - Common (Cont.) HystForPrdlnterFreq

Parameter name : HHO hysteresisRecommended valu e: 0, name iy Od

TimeTo TrigForPrdlnterFreqParameter name: HHO period trigg er delay timeRecommended value: 0, nameiy Oms

o Content: Hysteresis for inter-frequency hard handover in periodic al reportmode. Th is parameter is used to estimate the inter-frequency handoverat the RNC. The larger the value of this parameter, the stronger thecapability of res istirg sig nal fluc tuati on. Thus, the ping-pong effect canbe resisted, but the speed of the handover aigorit hm to respond to signalchange becomes Iower, and thus the handover may not be triggered intime.Value range: 029Physica value range: 0 4.5; step: 0.5Physical unit: dB

TimeToTrigForPrd!nterFreqContent: Interval between reception of penodical reports and triggering ofthe inter-frequency handover.Value range: 0 64000Physical value range: 0-64000; step: 1

o Physical uni t: msSet these parameters through ADD UCELLINTERFREQHOCOV/ MODUCELLINTERFREQHOCOV / SET UINTERFREQHOCOV.

HystForPrdlnterFreq

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1. nteFreqLoncy Handovor Ovorvkw2. !nter-Frequency Handover Measurement

1 inier-Frequercy Hmdor Measurernent Swflches2 t9r-FquGrv-y Handovr Mc-asuement Rept Mcdes3 IntrFrequncy Hndovr Mesurmert Events4. InterFrequency Handover Measurement Quantity5. Jnter-Frequeny Handover Compresd Mcde

3. hter-Freqtancy Handover Decision nd Execution4. Sgnaling Procedures for nter-Frequency Handover

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Inter-Frequency HandoverMeasurement QuantityMeasurement quantities vary according to the types of inter-frequencyhandovero in nter-frequency handov er based on cove rage, event (2B12D!2F) or periodical

measurement takes both CPICH Ec!No and RSCP as measurement quantitiesin inter-frequency hando ver based on OoS, event (2B) or periodicalrneasurement takes both CPICH Ec/No and RSCP as rne asur ement guantities.in Ioad-based inter-frequency blind handov er, CPICH RSCP of the usedfrequency is measured.

o in bad- and meas ure-based inter- frequency handover, both CPICHRSCP andCPICH_EcNo of the targetfrequency ara measured

in inter-frequency handover based on coverage, event 2B/2D/2F or periodicalmeasurementtakes both CPICH Ec/No and RSCP as measurementquantities.

o in the triggering phase, events 2D and 2F that correspond to CP ICH_Ec/Noand CPICH_RSCP are sent from the UE.in the measurement phase, event 2B or period ical measurement thatcorrespond to CPICHEc/No and CPICH_RSCP are sent from the UE.in inter-frequency handover based on coverage, the system del ivers bothCPICH Ec/No and RSCP as measurementquantities to perform 2D12Fmeasurement. To restrict the types of reported measurement quantities, setthe measurement triggering threshold to the minimum va lu e. For exampie, ifthe reporting of event 2D of CS service Ec/No is allowed but that of RSCP isrestricted, you can set InterFregCSThd2DRSCPto the minimum vaiue, thatis, -115.

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1. nter-Frequensy Handover Overvrw2. 1 nter-Frequency Handover Measurement

1. !nt r-Fr


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WCDMA Handover Algorithm and Param eters

Inter-Frequency HandoverCompressed Mode Compressed Mode control is a mechanism whereby certain

idle periods are created in radio frames during which the UEcan perform measurements on other frequencies.

If the UE needs to measure the pHot signa l strength of aninter-frequency 3G or 2G ceil and has a single-frequencyreceiver oniy, the UE must use the compressed mode.

Compressed mode control is a mechanism whereby certain idle periods arecreated in radio frames during which the UE can pe rform measurements onother frequencies. The UE can carry out measurements in the neighboring ceil,such as GSM ceM and FDD ceM on other frequency. if the UE needs to measurethe pilot signal strength of an inter-frequencyWCDMA or GSM ceil and has onefrequency receiver oniy, the UE must use the compressed mode.

Each physica l frame can provide 3 to 7 timeslots for the inter-frequency or interRAT ceil measurement, which enhances the transmit capability of phy sica lchannels but reduces the volume of data trafflc.

If the UE has a duai-frequency receiver, it can perform inter-frequencymeasurement witho ut starting the compressed mode if ali of the fol low ingcond itions are me t:

The CMP_UU_ADJACENT_FREQ_CM_SWITCH is on.The value of the lE Ad jacent fre quency measurementswithout compressedmode repor ted by the UE is TRUE.For the UE that supports dual-carrier HSDPA(DC -HSDPA):If the UE has a DC-HSDPA service, ali the celi s invo(ved in inter-frequencymeasurement are at the same frequency as the supplementary carrier.If the UE does not have a DC-HSDPAserv ice , ali the ce lis involved in interfrequency measurement are at the same frequency , with a 5 MHz spacin gfrom the cur ren t celi, but within the same band as the curre nt ceil.

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WC DMA Hando ver Agorthm and Parameters

inter-Frequency HandoverCompressed Mode The parameter DSFL!m !tCMIncI decides whether to start the DL

compressed mode according to the parameter LimitCMD!SFThd D If DISFLIm ItCM!nd = True

When the downllnk spre adin g factor is smaf ler than or equal to theparameter L!rnItCMDSFThd, the compressed mocle is disabledWhen the downlink spre ad ing fac tor is greater than the paraneterUmItCMD iSFThd , the comp ressecf mode i enabled

D If DISFLJmJtCMInd = False and the compressed mode is not lim ited

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WCDMA Handove r Aigorithm and Parame ters

Inter-Frequency HandoverCompressed Mode J!SFLImItCM!nd

Parameter name: Ol SF limit 0M indRecommended vaiue: FALSE

L!m!tCMD!SFThdParameter name: Di SF threshold to limit CMRecommerded value: D8, nam eiy SF8

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DISFLImItCMIndD Content: Th is parameter determines whether the compressed mode islimi ted to the downlink SF. Starting the compressed mode is resource

consuming for the fas t-mov ing UEs. Whether the spreading factors of thecurrent DOH channels shou ld be considered when the swi tch controllingthe start compressed moda is set. When the switch is set to FALSE. youcan infer that the start corn pressed mode does not consider thespreading factors of the DCH channels; when the switch is setto TRUE,you can infer that the start compressed mode considers the spreadingfactors of the DOH channels.

D Value range: FALSE(Not Limi ted), TRUE (Limited)D Physical value range: FALSE,TRUE

LImItCMDISFThdD Content: DL SF threshold to limit 0M. When DL SF limit 0M indicator isTRUE, if the downlink spreading factor is less than or equal to this

parameter va lue, the active set quality measurement is not a llowed and0M function should be deactivated. When DL SF limit CM ind is TRUE, if0M is activated, the downlink spreading factor should be greater thanthis parameter valu e.D Value range: D8, 016, D32 , D64, D128 , D256D Physical value range: 8,16,32,64,128,256

Set these parametera through SET LICMCF.



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WCDMA Handover Algorithm and Pararneters

!nter-Frequency HandoverCompressed Mode E

CategoriesDo wnin k cornpressed modeUplink compressed moda

Realization MethodsSpreading factor reduction (SF /2)Higl e r lay er scheduling LIl -/ N

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in DL, during compressed mode , UE receiver can test signal from otherfrequency. in order to avoid the effect cause by UE transmitter, compressedmode is alsa used in UL.

The approach of spreading factor haiving (SF/2) is resource consuming, and isrecommended oniy for siow -moving UEs . The higher layer scheduling mode hasa Ilmited appiica tion scope as it requires va riab le muitiplexing position of thetransmission channel. As the higher lay er scheduling mode affects thetransrnission rate of UEs. Such moda is recommended oniy when the approachof spreading factor halving (SF /2) is unavailable or for fas t-m oving UEs.

Which type of compressed moda ta use is au tomaticaiiy decided by the RNC onthe basis of the spreading factor used in the upiink orthe downiink.

u When the downlink spreading factor is greater than or equal ta theparameter D!SFTurnPoint, the SF/2 approach is preferred. Otherwise,the high layer scheduling 15 used.

D When the uplink spreading factar is greater than or equal to theparameter UISFTurnPoint, the SF/2 approach is preferred. Otherwise,the high layer scheduli r g is used.

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WCDMA Handov er Algorithm and Param eters

Inter-Frequency HandoverCompressed Mode DlSFTuraPoinf

Parameter name; DI SF thresholdRecommended valu e: D64

U!SFTurnPointParameter name: Ul SF thresholdRecomrrended value: D64

Content: CM implementation approach selection basis. When thedownInk spreading factor is greater than or equa to this parameter value ,the approach of spreading factor halving (SF /2) wili be preferred.Otherwise, the high layer scheduling wiil be preferreci.Value range: D8, D16, D32, D64, D128, D256Physical value range: 8,16,32,64,128,256

UISFTurnPointContent: CM implementation approach selection basis. Wher the upllnkspreading factor is greater than or equal ta this parameter value, theapproach of spreading factor halving (SF/2) wili be preferred. Otherwise,the high layer scheduling wiil be preferred.Value range: D8, D16, D32, D64, D128, D256Physical value range: 8,16,32,64,128,256

Set these parameters through ADDIMOD UCELLCMCF

D!SFTurnPoint

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WCDMA Handover Algo rithm and Parameters

E. Contents2. lnter-Frequency Handover

1. 1nter-rrquency Handove r Overvew2, In ter-Fr eque r cy Handover Measurement3. Inter-Frequency Handover Decision and Execution

1. Coverage- and QoS-based Inter-Frequency Handov er Decision andExecution

2. Load-ased nter-Frquenc Hadover D cison and Executon4. Signnling Procodu ros for hter-Frequency Handover

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Coverage- and QoS-based InterFrequency Handover Procedure

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in the triggering phaseo For the coverage-based handover, the RNC requests the UE to measure

through an inter-frequency measurement contro l message. If the CPICHEcINo or CP ICH RSCP of the current celi is Iower than thecorresponding threshold, the UE reports event 2D.For the QoS-based han ciover, if the service quality of the current celideteriorates, the Link Stabi lity C ontrol Algo rithm makes a handovermeasurement decision.

in the measurement phaseThe RNC sends an inter-frequency measurement control message ta theUE, requesting the No deB and UE to start the compressed moda. TheRNC also requests the UE ta perform the inter-frequency or inter-RA Thandover measurement.in this phase, the method of either periodical measurement report orevent-triggered measurement report can be used.

in the decision phaseo Atter the UE reports evert 2B, the RNC performs the handover. Or theUE pe riodicaliy generates measurement reports, and the RNC makes a

decision after evaluation. in the execution phase

o The RNC executes the handover procedure.

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WCDMA HancfoverAlgorithm and Parameters

Reporting Mode The coverage- and QoS-based inter-frequency handovers

are categorized into tw o types according to the following twomeasurement report modes:

Periodical measurement report modeEvent-triggered measurement report mode.

Each mode corresponds to a difterent decision andexecution procedure.

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WC DM A Hand overAlgorit

Periodical Measurement Report ModeAfter receMng the periodical measurement report of theinter-frequency celi, the RNC starts the foHowing decisionproced u res:

Decide whether both the CPICH Ec/No value and CPICH RS CPvalue of the pilot signal of the targ et ceil meet the requ irem en t ofinterfrequency handover. The evaluation formula is: +CIOtherFreg Terq + H12Start the hard handove r time-to-trigger timer, which is configuredthrough the parameter TimeTorrigForPrd!nterFreqIf Mother Fre q + ClOothe r_Freq


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Each caM in the measurement report shall be evaluated as mentioned previously.When the hard handover time-to-triggertimers of more than one ceB expire atthe same time, the latest measurement report is used for selecting the bestinter-frequency reighboring ceil for handover. For example, the ceM with thehighest CPICH RSCP in the atest measurement report is selected, as shown inthe above figure.

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Periodical Measurement Report ModePeriodical measurernent report mode:

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Event-Triggered Measurement ReportModeAfter receMng the event 2B measurement reports of CPICHRSCP and CP ICH Ec/N o of the inter-frequency cel i, theRNC starts the following procedure:

Add alt the pilot celis that trigger even t 2B to e ceil set andarrange the cel is according to the measurement quality ofCPICI-Ec/No iri descending orcier

o Select the celis in turn from the celi set to perform interfrequenc y h andover

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WCDMA Handover Algor ithm and Parameters t,


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1. rer-flequency Handcer Overnew2. nter-Frequncy Hardover Mesurem nt3. Inter-Frequency Handover Deci sion and Execution

1. CDverage- and S.bad ntarFre quancy Hndovr Dedicn andExecu tion

2. Load-based inter-Frequancy Handover Decision and Execution4. Signang Procadure for Intor-Fquency Handover

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Load-based Inter-Frequency Handover The LDR algorithm may trigger an inter-frequencyhandover. The inter-fequency LDR handover can be perforrned based

on bli nd handover or measurement that can be decided bythe parameter InterFreqLDHoMethodSelection

InterFreqLDHOMethodselection

InterFreqLDHOMethodSelectionContent: This parameterspecifies bad handover method . When networki composed of same frequency ban d, Blind Handover method issuggested. Otherwise, Measure handover is suggested.Value rat ge: BL!NDHO(BLINDHO), MEASUREHO (MEASUREHO)Physi cal value ran ge: BLINDHO(BIJNDHO),MEASUREHO(MEASUREHO)

D Set this parameter through ADD/MOD UCELLLDR.

D Parameter name: InterFreq Load Handover Method SeIectonD Recommended value: BLINDHO

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The laad-based inter-frequency handover suits best in the case of the co-sitedcelis covering the same area. in the triggering phase

The Load Reshuffiing (LDR) module directly determines whether thecurrent celi is in basic congestian and whether an inter-frequencyhandover needs to be performed. The LDR module provides the targetceil information fo r the current ceil, and the RNC performs the handoverprocedure.For details of LCR, see Load Contro!.

in the decision phaseFor Inter-frequency LDR biind handover, the RNC decides to trigger aninter-frequency blind handover if the corresponding conditions are met.After the inter-frequency handover is triggered, the RNC chooses adecision aigorithm accarding ta whether the conditions of direct blindhandover are met.Fo r inter-frequency LDR measure-based handover, the RNC requeststhe UE to perform the inter-frequency measurement. Based on themeasurement results, the RNC chooses a target ceil ta perform interfrequency hard handover.

in the execution phaseThe RNC performs the handover according ta the decision resuit.

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Load-based Inter-Frequency BIindHandover Decision The LDR algorithm Iearns that a ceil is in basic congestionand provides target cells and the UE with Iow priority for

handover.The RNC determines to trigger an inter-frequency blindhandover .

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it the RNC decides to perform ioad-based nter-frequency blind handover, it wiilirtitiates an intra-frequencymeasurement for oad-based inter-frequency blindhandover. The intra-frequency measurement is used to estimate quality of theinter-frequency celi of the same coverage.

HO_ALGO_LDR_ALLOW_SHO_SWITCH is se t through ]UCORRMALGOSWITCH

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Load-based lnter-Frequency BlindHandover Decision if the VE is not in satt handover state, the RNC directiy performs

load-based inter-frequency blind handover. it the UE is in soft handover state, the RNC operates based on thefollowing conditions:D If the HOJ4LGO_LDR_ALLOWSHO_SWTCH is set to ON, theRNC determines whether the ceil that triggers LOR is the best cet:

Ifthis cei l is the best ceil, the RNC initiates an intra-frequencyneasurernent for Ioad-based inter-frequency blind handover. if this ceil isnot the best celi, the RNC does not initiate a loed-based inter-frequencyb!ind handover.

If the HQALGQLDR_ALLOWSHQSWITCH is set ta 0FF, theRNC does not initiate a load-based inter-frequency biind hanciover.-

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Load-based Inter-Frequency BlindHandover Executiono 1. The RNC init ial ize s the tim er of intra-frequency measurement for blind

handover. 2. The RNC initiates e periodical in tra-f requency measurement. 3. After recei ving from the UE the int ra- frequ ency measurement reports

for cond itional blind handover, the RNC checks whether the followingcondit ion Is met:

CPICH RSCP of the celi in the measurement report >=B!indHOQualityCondlt(onIf the condition is met, the RNC increments the counter of the number of intr afrequency meas urem ent reports for biind handov er by 1.If the condition is not met, the RNC does not perform a bllnd handov er to theceil that triggers LDR and stops intra-frequency ne asurement for blindhandover.

The inter-frequency ce lis with the same coverage area have the same CPICHRSCP values. By measuring the CP ICH RSCP of the ceil, the qu ality of the celiswith the same coverage area can be determined, which increases the proba billtyof successful bli nd handover.

The intra-frequency measurement report mode is set to pe riodic al r eport.

The re porting perioci is BlindHOlntrafreqMR!nterval.The number of measurement reports is BlindHOlntrafreqMRAmount.The intra-frequency handover measurement qua ntity is CP ICH RSCP.The list of measured celis contains oniy the celis that trigger LDR.

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Load-based Inter-Frequency BIindHandover Execution 4. When the counter reaches the value ofBIindHO!ntrafreqMRAmount, the RNC initiates a blind

handover to the target ceil. J 5. If the timer of in tra-frequency measurement for blind

handover expires, the RNC does not pe rform a b(indhandover to the target celi and stops intra-frequencyhandover measurement for blind handover.

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Parameters of Load-based InterFrequency BIind Handover BindHOFlag

Parameter name: BIind handover fiagRecommended va lue: False

HO_AL GO_LDR_ALLOW_SHO_S WTCHParameter name: HandOver switchRecommended value: ON

o Content: Fiag of target celi for blind handovers. This parameter ndcateswhether the neighbo rin g celi is the target ceH for blind handovers. If thevalue is TRUE, blind handovers can be performed to the neighboring ceil.

o Value range: FALSE , TRUEPhysical vaiue range: FALSE , TRUEo Set th is parameter th rough ADD/MOD U 1 NTERFREQNCELL .

HO_ALGO_LDR_ALLOW_SHO_SWITCHo Content: When the swi tch is on, the LDR inter-frequency handover isallowe d dur ing soft handover.

Value range: ON, 0FFPhysical value range: 1, 0Set this parameter through SET UCORRMALGO SWITCH .

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Parameters of Load-based Inter-Frequency Blind Handover (Cont.) [ BlindHOlntrafreqMR!nteval

D Parameter name: lntrafrequency measurement report intervalof blind HORecommended value: D250, nameiy 250ms [

e BlindI-lOQualityConditionParameter name: Blind handover condition [.

D Recommended value: -92, nameiy -92dBrn

BlindHOlntrafreqMRlnteval 1]D Content: This parameter specifies the intra-frequency measurement reportinterval of blind handover. it determines the intra-frequency measurementreporting interval of Load ReshuffHng (LDR) biind handover. The smaller the

vaiue of this parameter, the smailer the intra-frequency measurementreporting interval, and the smailer the time for intra-frequency measurement,But the greater the influence of signal fluctuation, which can result in wrong Lhandover. On the contrary, the larger the va?ue of this parameter, the longerthe intra-frequency measurement reporting interval, and the Iess theinfluence of signal fluctuation, which can improve the possibility ofsuccessfui biind handover. But if the time for intra-frequency measurementbecomes long, the handover may not be performed timeiy.

D Value range: D250, D500 [a Physicai value range: 250, 500D Physicai unit: msD Set these parametersthrough SET UINTRAFREOHO

BlindHOQualityConditionD Content: Blind handover conditon. it the value is not -115, the handover is

defined as Conditional Blind HO, which is used for the inter-frequencyneighboring celis of the same coverage. If the vaiue is -115, the handover isdefined as Direct Blind HO, which is useci for the inter-frequencyneighboring celis of larger coverage.

o Value range: -115---25Physicai value range: -115--25; step: 1Physicai unit: dBm

D Set this parameter through ADD/MOD UINTERFREQNCELL.

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Parameters of Load-based InterFrequency BIind Handover (Cont.)B!indHOlntrafreqMRAmount

Parameter name: Intrafrequency measurement report amountof blind handoverRecommended value: D2, nameiy 2 times

Content: Th is parameter is used in the algori thm of the bad reshu ffling (LDR )intra-frequency blind handover. This parameter defines how manymeasurement reports are needed for makin g the blind handover decision.The RNC starts blind handover oniy if the UE continously reports adequateintra-frequency measurement reports that meet the quality requirements ofblind handover. During the measurement process, if the UE reports anunqualif ied measurement repo rt, the process ends. And the RNC does no tstart blind handover on the target cel i.Value range: DI D2, D4, D8Physical value range: 1, 2, 4, 8Set these parameters through SET UINTRAFREOHO.

BlindHOlntrafreqMRAmount

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1.WCDMA HandoverAigorithm and Parameters [


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Measurementbased bad handover is suggested for inter-band celis coveri ngthe same area

in the tri gger ing phaseThe Load Resh uffling (LDR) module directiy determines whether thecurrent celi is in basic cargestion and whether an inter-frequencyhandover needs ta be performed. The LDR module provides the targetceli inform ation for the current cefl, and the RNC performs the handoverprocedure.

in the measurement phaseThe RNC sends an inter-frequency measurement con trol message ta theUE, requesting t he NodeB and UE ta start the compressed mode.in this phase, oniy pe riodic al rneasurement report is used.

in the decision phaseo Based on the measurement results, the RNC chooses a target celi tape rform inter-frequency hard handover.

in the execution phaseThe RNC executes the handover procedure.


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Loact-based Inter-Frequency Measurebased Handover Decision and Execution

The LDR algorithm Iearn s that a ceil is in basic congestionand prov ides target celis and the UE with 10w priority fo rhandover.

The RNC selects the target ceil based on the measurementresu lts. The report period is specifled by the parameterPrdReportlnteva!

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WCDMA Handover Algorithrn and Parameters r


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Load-based Inter-Frequency Measurebased Handover Decision and Execu tion

The target ceil rnust meet the fol lowi ng conditions:Th e CPICH RSCP value of the target celi is larger thanTargetFreqThciRscp.The CPICH Ec/No value of the target celi is larger tha nTarge tFr eqTh dEcN O.The target ceil is not in the basic co ng estio n sta te.

The RNC performs an inter-frequency hard handover to thetarget ceil directl y.


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Parameters of Load-based InterFrequency Measure-based HandoverPRDREPORTINTERVAL

Parameter name: nter-freq Measure Periodicai Report PeriodRecommended vaue: D3000, nameiy 3000ms

TARGTFREQTHDRSCPParameter name: inter-freq Target Frequency Trigger RSCP THD

u Recomnerded value: -92 , nameiy -92dBm TARGETFREQTHDECNO

Parameter ram e: Inter-freq Target Frequency Tigger EcINo THDRecommended value: -12 , nameiy -12dB

PRDREPORTINTERVALD Content: The inte rval between two reports s the configu red valu e.D Value range: D250, D500, D1000 , D2000 , D3000 , D4 000, D6000, D 8000,D1200 0, D16000, D20000, D24000, D28000 , D32000 , D64000D Physical value range: 250, 500 , 1000, 2000, 3000, 4000, 6000, 8000, 12000,1600 0, 20000, 24000, 28000, 32000, 64000o Phys ical unit : ms

TARGETFREQ THDRSCPo Conten t: Estimate the signal quality of the pe riodic reports. The inter

frequency handover is triggered oniy wh en the signal quality of the targetceli is higherthan this parameter.o Note: The threshold can be reached oniy when RSCP and EcNo of the

target celi are above the RSCP and EcNo that are set in the command.Vaue range: -11 5---25Physical value range: -11 5 -25; step: 1

o Physic al unit: dBm TARGETFREQTHDECNO

o Content: Estimate the signal quality of the periodic reports. The interfrequency handover is triggered oniy when the signal quality of the targetceil is higherthan this parameter.

o Valu e range: -24 0Physica l value range: -24 0; step: 1Physica l unit: dB

Set these parameters through ADD /MOD UCELLMCLDR

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WCDMA Han de ver Algorithm and Parameters


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Contents

[(DL .Tiz[Et:t:L7

2. Inter-Frequency Handover1. hterFrequency Ha nd ov r Overvew2. interFr ?q uen cy Ha ndover Measurement3. lnter-Frequency Handovr Decision and Exec utk 3n4. Signaling Procedures fo r Inter-Frequency Handover

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WCDMA Handover Algorithm and Pa rameters


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Inter-frequency HandoverLU

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J Contents [1 . 1n cen


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. Contents3. Inter-RAT Handover

1. Inter-RAT Handover Overview2. 3G-to-2G Handover Measuremett3. 3G-to-2G Handover Decsion and Executon4. Sna3in Procedures for inter-RAT Handover

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tWCDMA Handover Algorithm and Parameters Z

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Inter-RAT handover refers to the handover performed between 3G network and2G network. nter-RAT handover provides continuous coverage, bad sharing,and HCS services, which fubiy utilizes the existing 2G network resources andthus reduces operators cost.

in this handover, however, GSM and UMTS dual-mode UEs (MSs) are required,and both the GSM MSC and the GSM BSS must be upgraded.

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nter-RAT Handover ScEnarios

CS handover1

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Inter-RAT Handover TypesBased on the triggering causes of handover, inter-frequencyhandover can be categorized in to four types:o Coverage-based 30 to 2G handoverQoS-based 3G ta 20 handoverLoad-based 3G to 20 handoverSe rvice-based 30 to 20 handover

Coverage-based 3G to 20 handover:The coverage of the 30 ne twork is incontinuous at the initial stage. Onthe border of the coverage, the poor signa l quality of the 3G networktriggers the 3G-to-2G measurement. If the signai quality of the 2Gnetw ork is good enough and ali the services of the UE are supported bythe 2G network, the coverage-based 30 ta 20 handover is triggered.

QoS-based 3G ta 2G handover:According ta the Link Stab ility Control Algorithm , the RNC needs totrigger the OoS-based 3G ta 2G handover to avoid cail drops.

Load-based 30 ta 20 handover:o if the bad of the 3G network is heavy and abi the RABs of the UE aresupported by the 2G netw ork, the boad -based 3G to 20 handover is

triggered. Service-based 3G to 2G handover:

Based on layered services, the tra ffic of differ en t ciasses is handed overta different systems. For exampie, when an Ad apt ive Multi Rate (AMR)speech service is requested, th is service can be handed over ta the 2Gnetw ork.

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WCDMA Handover Algorithm and Parameters (T


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3G-to-2G Handover Preconditions r Before handover, the RNC checks whether afl the preconditions

for the 3G-to-2G handoverare met: ,L- (J iServce handover ndcators Service requirements Handover rules

Before deciding the 3G-to-2G handover, the RNC checks whetheralt the preconditions are met:

2G cel i capabilityService capabilityUE capabiiity

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Service Handover Indicafor The lE Service Handover Indicator indicates the CN policy

for the service handover to the 2G network. it is indicated inthe RAB assignment signallng assigned by the CN, orprovided by the RNC

The aigorithm switch HoSwitch:HONTERRA TfiNC_SERWCE_HO_SWITCH decideswhetherthe service attribute of inter-R AT handover is basedon the RNC or the CN

If the switch is set ta ON, the service attribute of inter-RAT handover is based onthe parameter configured on the RNC side.

If the switch is set ta 0FF, the service attribute of inter-RAT handover is f irstbased on the CN when the indicator is contained in the RAB assignmentsignali ng assigned by the CN. If the CN does not allocate a service indicator, theservice attribute of inter-RAT handover is based on the RNC side.

HOJNTERJ?A T_RNC_SERVICE_HO_SW!TCH is set through IUCORRMALGOSWITCH

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WCD MA Handove r Aigorithm and Parameters T[


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Service Handover IndicatorThrough the SHND parameter, the service handover indicatorsare set in RN C as follows:

HO_TQGSM_SHOULD_BE_PERFORM: means that the han doverto the 2G network is per forrned when 2G signa ls are ava ilabie.HO_TO_GSM_SHOULD_NOT_BEPERFORM: mean s tha t thehand over to the 2G netw ork is perform ed wh en 3G sig nals are weakbut 2G sign als are strong .HO_TO_GSM_SHALL_NCTfiE_PERFORM: means that th ehandover to t he 2G network is not per form ed even when 3G signalsare weak but 2G signa is are strong.

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SHIND is set through ADD/MOD UTYPRABBASIC

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WCDMA Handover Agorfthm and Parameters


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Rules for Enabling 3G -to-2G Handover Rules for enabling Coverace- and QoSbased 3G4o-2G

handover:Service Handover Indicator:

HO_TQGSM_SHOULD_BE_PERFORMHO_TO_GSM_SHOULD_NOTfiE_PERFORM

Impacts of different types of capabillty on handover decision:Refer to the foliowing table

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!mpacts of different types of capability on handover decisionCeil VE Gapab I tyy Servce Capablty (Requred by 2G)Capablty EDGE GPRS GSMEDGE EDGE Aliowed Allowed Allowed

GPRS AUowed Allowed AllowedGSM Not allowed Not ailowed AllowedNot suppcrted by Not allowed No t allowed Not allowed2G

GPRS EDGE Aliowed Allowed AllowedGPRS Allowed Allowed AllowedGSM Not aflowed Not aliowed AHowedNot supported by Not allowed Not allowed Not allowed2G

GSM EDGE Not aliowed Not allowed AliowedGPRS Not allowed Not atlowed AllowedGSM Not allowed Not aliowed AllowedNot supported by Not allowed No t allowed Not allowed2G

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(.WCDM A Handover Algorithm and Parameters


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Impacts of differenttypes of capability on handover decsionCeil UE Capabhty Servce Capablty (Requred by 20)Capabilhiy ED GE GPRS GSMEDGE ED GE Allowed Allowed Allowed

GPRS Not allowed Allowed AllowedGSM Not aliowed Not aliow ed AllowedNot supported by 2G Not allow ed No t allowed Not allow ed

GPRS EDG E Not aowed Allowed Al lowedGPRS Not aIowed Allow ed AllowedGSM Not ailowed No t allowed AllowedNo t supported by 2G Not allow ed Not afl owed Not allow ed

GSM ED GE Not ai lowed Not allowed AllowedGPRS Not allowed Not allowed AllowedGSM Not allowed Not allowed AliowedNo t supported by 2G Not al lowed Not ailowed Not allowed

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Rules for Enabling 3G-to-2G HandoverRules for enabiing Lpd-based 3G-to-2G handover::D Serv ice Handover Indicator: _

HO TO GSM Sl-IOULD BE PERFORM 7 - /HO_TO_GSM_SHOULD_NOT_BEPERFORM .? /

D Impacts of different typ es of capahity on handover decision:Refer to the following table


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Rules for Enablln 3Rules for enabling Service-based 3G-to-2G handover::

Service Ha ndo ver Ind icator:HQTQGSMSHOULD_BE_PERFORM

tmpacts of different types of capabil ity on handover decision:Refer to the fol!owing table

Switches for Service-based 3G-to -2G Handover

, 1Gopynght Lid. M dght re sr ed , Pagei 257J HUAWEi

Impacts of diffe rent types of capab il ity on handover decision (The table is thesame wth Load-based one.)

Ta perfo rm the service-based 3G to 20 handover, the RNC must turn on therelated switches for services in the CS and PS domains.

When a single CS service is initialiy set up by the UE, the RNC allowsthe 30 ta 20 service-based handover if CSServiceHOSwitch is set taON .When a single PS service is initially set up by the UE, the RNC aliowsthe service-based 3G -to-2G handover if PSServiceHOSwitch is set toON.For the combined services, no service-based handover i triggered.For more detai led information , pease refer ta the ADD UCELLH000MMcommand.

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WCD MA Handover Al gorithm and Parameters

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EDG E EDG E Allowed Allow ed AllowedGPRS Not allowed Allowed AllowedGSM Not allow ed No t allow ed All ow edNo t suppcrted by 2G Not aH ow ed No t aflowed Not aU owe d

GPRS ED GE Not allow ed Allowed Allow edGPRS Not all ow ed Allow ed Allowe dGS M No t all ow ed No t allowed Allowe dNot supported by 2G Not allowed Not allowed Not allowed

GSM EDG E Not allow ed Not allowed Allowe dGPRS No t allow ed Not allowed Allow edGSM No t allowed No t al lowe d AllowedNot supported by 2G Not all owe d Not allowed Not allowed

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2G Ceil Capability


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2G ceil capability is configured through the parameterRATC ELLTYPE . Th is parameter indicates whether the ceilsupports the GSM, GPRS, or EDGE.

RATCELLTYPEParameter name: Inter-RAT celi typeRecommended value: None

Content: ldentifying the type of the in ter-R ATceU NQ.CAPABILITYindicates that the capacity of the GSM ceil remains urknown. it is no trecommended to set the celi type to NO CAPABILITY. If the ceil type isNO CA PAB ILITY, the inter-RAT handover cannot be triggered.Va lue range: NO_CAPABILITY(Ce ll capab iflty unknown) , GSM, GPRS,EDGEActual Value Range: NO CAPABILITY, GSM, GPRS, EDGESet th is parameterthrough ADD UEXT2GCELL/MOD UEXT2GCELL.

RATCELLTYPE

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WCDMA Handove r Algor ithm and Parameters

Service Capability


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The Required 2G Capabiity (Req2GCap) specifles thecapabiity of 2G celis required by inter-RAT handover. Th isindicates whether the service is supported by the GSM,GPRS,orEDGEReq2GCap

Pa rameter name: Requ ired 2G CapabilityRecommended value: None

Content: This parameter specif les the minimum capability of the 2G celireq uired by inter-RAT handovers from 3G networks to 2G networks. Ifthe capabHity of the 2G ceit does not meet the requirement, the hando verwiil not be performed. in terms of the ability to support PS services,EDGE celis rank first, GPRS cel is second, and GSM celis third.Value range: GSM, GPRS, EDGEActual Valu e Range: GSM, GPRS, EDGESet this pa rameter through ADD UTYPRABBASIC/MODUTYPRABBASIC.

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Req2GCap

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-WCDMA Handover Algorithm and Pararneters

UE Capability


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Upon the recep tion of the UE capability informationmessage, the RNC decides whether to start the inter-RATmeasurement. The information indicates whether the UEsupports the GSM, GPRS, OF EDGE.

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Contents

WCDMA HandoverAlgorithm and Parameters E[[1


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3. Inter-RAT Handover1. nter-RAT Handover Overview2. 3G-to-2G Handover Measurement

1. 30-to-2G Handover Measurement Switches2. 30-to-2G Handover Meauremert Report Mo des3. 3G -to-2G H3ndover Measu rern9nt Evenis4. 3G-to-20 Handover Meosurernent Quan tity5. 3G-to-2G Handover Comprossed Mode3Gto-2G Handover Decision nd ExecuonSiqnating Procedures for hter-RAT Handover

3.4.

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WCDMA HandoverA lgor ithm and Parameters

3G-to-2G Handover MeasurementSwitches


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The 3G-to-2G handover measurement switches are specfied bythe sub-parameters of HoSwitch:HO _MQSIGNALSW ITCH: The switch decides wheth er the qualfty

measurernent on the active set is delivered after signaling setup butbefo re ser vice setup. 3 LtHOIAITERRA T_PS_OUT_SVL 7TCH: The swi tch decides whetherthe RNC wili init iate inter-RAT measurement ta trigger inter-RAThandover of the PS domain from the UTRAN. .HOJNTERRAT_CSOUTSW(TCH: The switch decides whetherthe RNC wili initiate inter-RAT measurament ta trigger inter-RAThandover of the CS domain from the UTRAN.

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These parameters ara set through SET UCORRMALGOSWITCH Recommended value:

D HO_MC_SIGNAL_SWITCH: 0FFD HO_INTER_RATPS_OUTSWITCH: OND HOjNTERRATCS_0UTSWlTCH: ON

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WCDMA HandoverAlgo rithm and Parameters

r.3Contents


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3. Inter-RAT Handover1. nter-RAT Handover OvM ew2. 3G-to-2G Handover Measurement

1 3G-to2G Handover Measuremort Sv..tches (2. 3G-to-2G Handover Me asuremer t Report Modes3 3G4o2G Hand ove Measurernent Events4 3G -to-2G Handover Measienent Quaniity5. 3G-to4G Hauoover Compressed Made

3. 30-to-2G Handover Deion and Exeoution4. Sgnallng Procedures for Inte r-RA T Handoer

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WCD MA Handover Algorfthm and Parameters

3G -to-2G Handover MeasurementReport Modes


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Event-triggered measurement report modeUE test the 2G neighbor RSSI

Perodica measurement report modeo UE test the 2G neighbor RSSI, and current ceil Ec/No or RSCP

nterRatReportModeParameter name: Int er-RAT report modeRecommended value: PE R O DI C AL _RE PORT IN G

For coverage or QoS based UM TS-to-GSM handover, there are twomeasurement report modes: event-triggered measurement report mode andperiodical measurement report mode.

For bad or service-based 3G-to-2G handover, the measurement report is eventtriggered oniy.

InterRatReportModeContent: This parameter specifies the inter-RAT measurement report mode.Valu e range: PEROD ICAL_REPORTING(Periodical rep orting),EVENT_TRIGGER(Event trigger )Physical value range: Periodical reporting , Event tri gger

D Set this parameters th rough ADD UCELLINTERRATHOCOV/ MODUCELLINTERRATHOCOV/ SET U INTERRATHOCOV.

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WCDMA HandoverAigorithrn and Parameters

3G-to-2G Handover MeasurementReport Modes


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InterRATPer!odReport!ntevaParameter name: Inter-RAT period repo interval [msjRecommended value: D1000 , nameiy l000ms

nterRATMeasTimeParameter name: nter-RAT measure timer length [s]Recommended value: 60, nameiy 60s

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Content: This pararneter specifies the Interval that the UE reports inter-RATmeasurement results ta the RNC.Value range: NON_PERIODICREPORT(Non periodical reporting), D250-1D500-2 D1000 3 D2000 4 D3000-5 D4000 6 D 6000 7 D 800 0 8D1200 0 9 D16 00 0 1 0 D20000 11 D24 00 0 1 2 D28 00 0 1 3 D32 00 0 1 4D64000Physical vaiue range: NON_PERIODICREPORT, 250, 500, 1000, 2000,3000, 4000, 6000, 8000, 12000, 18000, 20000, 24000, 28000, 32000,64000Physical unit: rns

In terRATM easTime jD Content: Timer Iength for inter-RAT rneasurement. After inter-RATmeasurement starts, if na inter-RAT handover i performed when this timer

times out, the inter-RAT rneasurement is stopped. in additian, thecompressed mode is deactivated, if any; If the value is 0, you can infer thatthe inter-RAT measurementtimer is not started.D Value range: 0 512

Physical vaiue range: 0 51 2; step: 1Physicai unit: s

Set this parameters through ADD UCELLINTERRATHOCOVI MODUCELLINTERRATHOCOV/ SET UINTERRATHOCOV.

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. Contents


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3. Inter-RAT Handover1. nter-RAT Hndover Overview2. 3G-to-2G Handover Measuremen t

1. 3G -to-2G Handover Meawernent Swi tches2. 3G-to-20 Handover Measurernent Report Modes3. 3G-to-2G Handover Measurement Even ts4. 3G- to-2G Haadover Measurement Quantity5. 3G-to2G Handover Compressed Mode

3. 30-ta.-20 Handover Decision and Execution4. Signain Procedures for rrer-RAT Handoer

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1,WCDMA Handover Algorithm and Parameters

r3G-to-2G Handover MeasurementEvents


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e Measurement events involved in 3G-to-2G Handover

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Event 2D The estirnated quality ofthe currentiy used frequency isbelow a certain threshold.

Event 2F The estirnated quality of the curremiy used frequency isabove a certain threshold.

Event 3A The estimated quality of the currently used UTRANfrequency is below a certain threshold and the estirnatedquality of the other system is above a certain threshold.

Event 3 C The estirnated qual ity of other systern is above a certai nthreshold.

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WCDMA Han dover Algorithm and Parameters

3G-to-2G Handover MeasurementEvents - 2D


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2D event:The estimated quaty of the currentiy used fre que rcy is belowa certai n t hresho ld .Even t 2D is tr igg ered on the basis of the following formula :

U ed Tu2d -

Used is the measurementvalue of the celi st the currentiy used frequency. TUsed2d is the absolute qua lity threshold of the celi at the cu rren tiy usedfrequency. Based on the service type and measurement quantity, t hi s threshold

can be configured through the following parameters:InterRA TCS Thd 2DE cN O

o InterRATR99Ps Thd2 DEc NOo InterRATHT hd2D EcNO

InterRATCSThd2DRSCPInterRA TRS9PsThd2DRSCPInterRA THThd2DRSCP

H is the event 2D hysteresis value set through the parameter HystFor2D. For the PS and CS combined services, the threshold(s) for C S services is (are)

used. When the conditions for event 2D are met and maintained in time-to-trigger

specifled by the parameter T!m eTo Trig2D, the UE sends the measurementreport of event 2D.

Any of the Ec/N o and RSCP measurement result can trigger the 2D event.


WCDM A Handover Algori thrn and Parameters

Parameters of 3G-to-2G Handover - 2D(T.r


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Parameter Recommended ValueInte rRATCSThd2DEcNO -14 , nameiy -14dBInterRATRG9PsThd2DEcNO -15, nameiy -15 dB >nterRATHThd2DEcNO -15, namely-l5dBnterRATCSThd2DRSCP -1 00, name iy -1 OOdBmInterRATR99PsThd2DRSCF -110, ramely -11 OdBmnterRATRThd2DRSCP -110, name iy -11 OdBmHystFor 2D 4, nameiy 2dB

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Recommended values of TUS2d:

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The parameters for in ter-RAT hanc {ove r 2D are similar with inter-frequencyhandover.

Set above paraneters through ADD UCELLINTERRATHOCOV/ MODUCELLINTERRATH000V/ SET UINTERRATH000V.



3G-to-2G Handover MeasurementEvents 2F


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InterRATCSThd2FEcNOInferRATR99PsThd2FEcNOInterRA THThd2FEcNOInterRATCSThd2FRSCP

o lnterRATR99PsThd2FRSCPInterRATHThd2FRSCP

H is the event 2F hysteresis value set through the parameter HystFor2F. For the PS and CS combined services, the threshold(s) for CS services is (are)

used. When the conditions for event 2F are met and maintained in time-to-trigger

specifled by TrigTime2F, the UE sends the measurement report of event 2F.Any of Ec/No and RSCP measurement result can trigger the 2F event.Conditions of event 2F are as follows: TUS2d H2


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The parameters for inter-RAT handover 2F are similar with inter-frequencyhandover.

Set above parameters through ADD UCELLINTERRATHOCOV/ MODUCELLINTERRATHOCOV/ SET UINTERRATHOCOV.

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Recommended vales of 2F event:Pamte

nterRATCSThd2FEcNO -12, nameiy -12dBInterRATRQ9PsThd2FEcNO -13, nameiy -13dBInterRATHThd2FEcNO -13, nam ely -l3dBInterRATCST hd2FRSC P -97 , namei y -97dBmInterRATR99PsThd 2FRSCP -107, name iy -lO7dBmInterRATHTId 2FRSCP -107, nameiy - lO7dBmHystFor2F 4, nameiy 2dBTimeToTrig2F D1280, nam eiy 1280ms

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3G-to-2G Handover MeasurementEvents - 3A3Aevent:


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The estimated quality of the currentiy used UTRAN frequencyis below a certain threshold and the estimated quality of theother system is above a certain threshold

D Even t 3A is triggered on the basis of the following formula:

Used is the measurernent value of the cei l at the currently used frequency. TU sed is the absolute quality threshold of the ceil that uses the current frequency.Based on the service type and measurement quantity in the coverage-basedhandover, TUsed can be configured through the foUowing parameters

UsedFreqCSThdEcNoUsedFreqCSThdRSCP

D UsedFreqHThdEcNOUsedFreqHThdRSCP

o LIsedFreqR99PsThdEcNOUsedFreqR99Ps ThdRSCP

MotherRAT is the measurement value of the celi (in another RAT) in the repo rtingrange. is the celi individual offset value of the celi (in another RAT) in thereporting range which is equal to the sum of CIO and ClOOffset. 15 the absolute inter-RAT handover threshold. Based on diffe rentservice types (OS PS domain R99 service, or PS domain HSPA service), thisthreshold can be con fig ured through the followin g parameters:

o TargetRatCsThd0 TargetRatR99PsThdD TargetRatHrhd

H is 3A hysteresis, the hysteresis value of event 3A. For the PS and CS combined services, the threshold(s) for CS services is (are)used. When the conditions for event 3A are met and maintained in time-to-triggerspecified by Tr igTime3A the UE sends the measurement repo rt of event 3A.

OthSIRAT + CIOOT +H3/Tu - Ha/

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WCDMA Handover AIgor thm and Parameters

Parameters of Inter-FrequencyHandover -3A

Recommended values of

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UsedFreqCSThdEcN0 -12 , nam eiy -13dBUsedFreqR 99PsThdEcNO -13, nameiy -13dBUsedFre qHT hdEcNo -13, nameiy -13dBUsed FreqCSThdRSCP -97 , nam eiy -97dBmUsedFreqR99PsThdRSCP -107, nameiy -lO7dBmUsed FreqHThdRSCP -107, nameiy -lO7 dBm

The parameters for inter-RAT handover 3A are similar with inter-frequency 2B . Set above parameters through AD D UCELLINTERRATHOCOV/ MO D

UCELLI NTERRATHOCOV! SET UINTERRATHOCOV.

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Parameters of Inter-FrequencyHandover -3A (ConL)

Recommended values of TOtherp


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TargetRatCsThd 16, nameiy -95dBmTargetRatR99PsThd 16, nameiy -95dBmTargetRatHThd 16, nameiy -95dBm

The parameters for inter-RAT handover 3A are similar with inter-frequency 2B. Set above parameters through ADD UCELLINTERRATHOCOV! MOD

UCE LLINTERRATHOCOV / SET UINTERRATHOCOV.

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Parameters of Inter-FrequencyHandover -3A (ConL)

Hystfor3A


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( 1Para meter name: 3A hysteresis

< e cRecommended value: 4, nameiy 2dB TrigTime3A

Parameter name: 3A event trigger delay timeRecommended value: DO , nameiy Oms

___ eng e saLta.9Hystfor3A

Content: Hysteresis value for the event 3A. The value of this parametercorrelates with sow fading. The larger the value of this parameter, thestronger the capability of resisting signal fluctuation. Thus, the ping-pongeffect can be avoided, but the speed of the handover algorithm to respondto signal change becomes ower. If the inter-RAT handover hysteresis is setto an excessively high value, the GSM cei l to which the UE is handed overmust be of good quality. Therefore, the conditions for triggering the interRAT handover decision are hard to be satisfled, and the cali drop rateincreases.Value range: 0--1 5Physical value range: 0 7.5; step: 0.5Physical unit: dB

TrigTime3Au Content: Time delay to trigger the event 3A. The value of this parameter

correlates with slow fading. The larger the value of this parameter, the Iowerthe incorrect decision probability, but the slower the respanse of the event3A to measurement signal change.Value range: DO, Db, D20, D40, D60, D80, D100, D120, D160, D200,D240, D320, D640, D1280, D2560, D5000Physicalvalue range: 0, 101 20, 40,60, 80, 100, 120, 160, 200, 240, 320,640, 1280, 2560, 5000Physical unit: s

Set these parameters through ADD UCELLINTERRATHOCOV/MODUCELLINTERRATHOCOV/ SET UlNTERRATHOCOV.Confldential Information of Huawei. No Spreading Without Permission Liz

-f


3G-to-2G Handover MeasurementEvents 3C

3C event:


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The estimated qual ity of other system is above a cer tai nthreshoWEvent 3C is triggered on the basis of the following formula:

MoerpT + CIOopJT Tp H32

Mo therp JT is the measurement value of the ceil (in another RAT) in the reportingrange. CIOOIherT is the celi ind iv idua l offset value of the ceH (in another RAT) in thereporting range, which is equal to the sum of CIO and C!OOffset. T0therT is the absolute inter-RAT handover threshold. Based on different

se rvice types (CS 1 PS domain R99 service, or PS domain HSPA service), thisthreshold can be configured through the following parameters:InterRA TNCovKOCS ThdInterRA TNCo vHOPSThd

H is 3C hysteresis, the hysteresis value of event 3C. For the PS and CS combined services, the threshold(s) for CS services i (are)

used. When the conditions for event 3C are met and the delay requirement specifiedby the TrigTime3C parameter can be satisfied, the UE sends the measurementrep ort of event 3C .

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WCDMA Ha ndov er Algorithm and Parameters

Parameters of Inter-FrequencyHandover -3C

Recommended va!ues of 3C:

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Pee conmdefiVaeInterRATNCovHOCSThd 21, name iy 9Od8mInterRATNCovHOPSThd 21, nam eiy -9OdBmHystfor3C 0, nameiy 0dBTrigTme3C D640, name iy 64 0m s

The parameters for inter-RAT handover 3C are similar with inter-frequency 2C. Set above parameters through AD D UCELLINTERRATHONCOV/ MO D

UCE LLI N TE R RA THO N CO V! S ET U 1 NTER RAT HON COV .

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WCDMA Handover Algorithm and Par ameters

Parameters of Inter-FrequencyHandover - Common.cIo


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Parameter name: Celi oriented Ceil ndividua l Offse tRecommended valu e: 0, nameiy 0dB

C OOffsetParameter name: Neighboring cel orierted CIORecommended value : 0, name iy 0dB

Conten t: This parameter is used for the inter-RAT handover decision incombination with the neighbor ing celi oriented CIO. The larger the sum,the higher the handover priority of the GSM ceil. The smaller the sum,the Iower the handover priority of the GSM celi. The parameter isgener aUy set to 0.Value range: -5050Phys ical va lue range: -5050; step: 1Physic al unit: dBSet th is parameter through ADD UEXT2GCELU MOD UEXT2GCELL .

ClOOffsetCon tent : This parameter is used for decision making for the inter-RAThandover. The larger the value of the parameter, the higher the handoverpriority of the GSM ceil. The smaller the value of the parameter, theIower the handover priority of the GSM ceil.Valu e range: -50-- 50Phys ical value range: -50--50; step: 1PhyscaI unit: dBSet this parameter through ADD U2GNCELU MOD U2GNCELL.

co

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UWCDMA Handover AIorithm and Parameters

3G-to-2G Handover MeasurementQuantity

te MeasQuartityOf3A L

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