CE Overbooking (RAN15.0 05)

WCDMA RAN

CE Overbooking Feature ParameterDescription

Issue 05Date 2014-04-30

HUAWEI TECHNOLOGIES CO., LTD.

Copyright Huawei Technologies Co., Ltd. 2014. All rights reserved.No part of this document may be reproduced or transmitted in any form or by any means without prior writtenconsent of Huawei Technologies Co., Ltd. Trademarks and Permissions

and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.All other trademarks and trade names mentioned in this document are the property of their respective holders. NoticeThe purchased products, services and features are stipulated by the contract made between Huawei and thecustomer. All or part of the products, services and features described in this document may not be within thepurchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information,and recommendations in this document are provided "AS IS" without warranties, guarantees or representationsof any kind, either express or implied.

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Website: http://www.huawei.comEmail: [email protected]

Issue 05 (2014-04-30) Huawei Proprietary and ConfidentialCopyright Huawei Technologies Co., Ltd.

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Contents

1 About This Document..................................................................................................................11.1 Scope..............................................................................................................................................................................11.2 Intended Audience..........................................................................................................................................................11.3 Change History...............................................................................................................................................................11.4 Differences Between Base Station Types.......................................................................................................................52 Overview.........................................................................................................................................63 Technical Description...................................................................................................................84 Credit Resource-based CAC......................................................................................................105 Basic Congestion based on NodeB Credit Resources...........................................................146 TTI Selection During PS BE Service Setup or Reconfiguration........................................157 Admission-CE-based Dynamic TTI Adjustment for a Single BE Service over HSUPA............................................................................................................................................................168 Related Features...........................................................................................................................179 Network Impact...........................................................................................................................1810 Engineering Guidelines...........................................................................................................2010.1 When to Use CE Overbooking...................................................................................................................................2010.2 Required Information.................................................................................................................................................2010.3 Deployment................................................................................................................................................................2110.3.1 Requirements...........................................................................................................................................................2110.3.2 Activation................................................................................................................................................................2110.3.3 Activation Observation............................................................................................................................................2310.3.4 Deactivation.............................................................................................................................................................2310.4 Performance Optimization..........................................................................................................................................2310.5 Parameter Optimization..............................................................................................................................................2910.6 Troubleshooting..........................................................................................................................................................2911 Parameters...................................................................................................................................3012 Counters......................................................................................................................................6913 Glossary.......................................................................................................................................71

WCDMA RANCE Overbooking Feature Parameter Description Contents


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14 Reference Documents...............................................................................................................72

WCDMA RANCE Overbooking Feature Parameter Description Contents


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1 About This Document1.1 Scope

This document describes WRFD-140212 CE Overbooking, including its technical principles,related features, network impact, and engineering guidelines.

This document applies to the following NE types.

NE Type NE ModelRNC BSC6900, BSC6910NodeB Macro 3900 series macro base stations: BTS3900, BTS3900A,

BTS3900L, BTS3900AL, DBS3900, BTS3900C3800 series macro base stations: DBS3800, BTS3812E,BTS3812AE

Micro BTS3803E, BTS3902ELampSite DBS3900

1.2 Intended AudienceThis document is intended for personnel who:l Need to understand the features described hereinl Work with Huawei products

1.3 Change HistoryThis section provides information about the changes in different document versions. There aretwo types of changes, which are defined as follows:

WCDMA RANCE Overbooking Feature Parameter Description 1 About This Document


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l Feature changeChanges in features of a specific product version

l Editorial changeChanges in wording or addition of information that was not described in the earlier version

RAN15.0 05(2014-04-30)This issue includes the following changes.

Change Type Change Description ParameterChange

Feature change Added the method of Activation Observation andperformance optimization, for details see the 10.3.3Activation Observation.

None

Editorial change None None

RAN15.0 04(2014-02-28)This issue includes the following changes.


Feature change None NoneEditorial change Added the descriptions about the feature and

function differences between NodeBs of differenttypes. For details, see section 1.4 DifferencesBetween Base Station Types.Optimized document description, Enhanceddocument readability.

None

RAN15.0 03 (2013-09-30)This issue includes the following changes.

ChangeType

Change Description ParameterChange

Featurechange

None None



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ChangeType


Editorialchange

l Added formulas for calculating the number of CEs requiredfor admitting HSUPA UEs to chapter 4 Credit Resource-based CAC.

l Added one note for hardware dependencies to section 10.3.1Requirements and one activation observation method tosection 10.3.3 Activation Observation.

l Optimized document description.

None

RAN15.0 02 (2013-06-30)This issue includes the following changes.

ChangeType


Featurechange

None None

Editorialchange

Optimized the descriptions in sections 10.1 When to Use CEOverbooking and 10.2 Required Information.

None

RAN15.0 01 (2013-04-28)This issue does not include any changes.

RAN15.0 Draft A (2013-01-30)Compared with Issue 03 (2012-11-30) of RAN14.0, Draft A (2013-01-30) of RAN15.0 includesthe following changes.



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Feature change Changed the following description in Table3-1.Original:For HSUPA UEs, the NodeB adjusts thecredit resource usage of admitted UEs to beless than or equal to the calculation result ofthe following formula:Credit resource usage = Max (Creditresources required for ensuring the GBR,Credit resources required for transmittingone RLC PDU)l If the UEs use a 10 ms TTI, the

adjustment is based on the UE rate.l If the UEs use a 2 ms TTI, the adjustment

is based on the UE rate and theREVDPARA4 parameter.Revised:

l For HSUPA UEs using a 10 ms TTI: TheNodeB adjusts the amount of creditresources that will be consumed by eachadmitted UE based on the UE data rate.The adjusted amount does not exceed thecredit resource amount corresponding toRateone RLC PDU.

l For HSUPA UEs using a 2 ms TTI: TheNodeB adjusts the amount of creditresources that will be consumed by eachadmitted UE based on the UE data rateand the setting of theCERSVFOR2MSUSER parameter. Theadjusted amount does not exceed thecredit resource amount corresponding toRateone RLC PDU.

None.

Editorial change Optimized the description in section 9Network Impact.

None.

Optimized the description in section 10.1When to Use CE Overbooking.

None.



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Changed the switch fromRESERVED_SWITCH_1_BIT5 underthe RsvSwitch1 parameter in the SETUALGORSVPARA command toPERFENH_CELL_HSUPA_CAP_CHANGE_OPT_SWITCH under thePerfEnhanceSwitch(BSC6900,BSC6910)parameter in the SET UCORRMPARAcommand.Changed the parameter fromREVDPARA4 to CERSVFOR2MSUSER.

PerfEnhanceSwitch(BSC6900,BSC6910)CERSVFOR2MSUSER

1.4 Differences Between Base Station TypesFeature Support by Macro, Micro, and LampSite Base Stations

FeatureID

Description

Supported byController(Y/N/NA)

Supported byMacro(Y/N/NA)

Supported by Micro(Y/N/NA)

LampSite

BSC6900

BSC6910

BTS3803E

BTS3902E

WRFD-140212

CEOverbooking

Y Y Y Y Y Y

NOTE

Y indicates that a feature is supported; N indicates that a feature is not supported; NA indicates that an NE isnot involved, that is, a feature does not require the support of the NE.



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2 OverviewAfter WRFD-010638 Dynamic CE Resource Management is applied, the RNC calculates theamount of credit resources that will be consumed by an admitted High Speed Uplink PacketAccess (HSUPA) UE using the following formula:Rate = Max (GBR, Rateone RLC PDU)where,l GBR stands for guaranteed bit rate.l Rateone RLC PDU is the rate at which one Radio Link Control (RLC) packet data unit (PDU)

is transmitted at one transmission time interval (TTI).l If the layer 2 enhancement function is enabled, the size of the RLC PDU in the preceding

formula equals that of the smallest RLC PDU. If this function is not enabled, the size ofthe RLC PDU in the formula is fixed. For the size of the RLC PDU in the formula, seeHSPA Evolution Feature Parameter Description.

The RNC uses the preceding formula to ensure HSUPA user experience.However, after the preceding formula is applied, the channel element (CE) usage on the NodeBside is lower than the credit resource usage on the RNC side for the following reasons:l The NodeB calculates the CE usage based on actual user data rates.l An actual user data rate is usually lower than the GBR or Rateone RLC PDU.l The penetration rate of 2 ms TTI HSUPA UEs is high.As a result, the RNC may reject new UE access requests when the CE usage on the NodeB sideis low, which limits the RNC's capability to perform admission control based on credit resourceusage. To enhance the RNC capability, you can use the CE Overbooking feature.CE Overbooking works as follows:l The NodeB calculates the amount of CEs that will be consumed by an admitted UE, includes

the calculated amount into a private information element (IE) in the Common MeasurementReport message, and sends the report to the RNC at an interval specified by theTenMsecForUlBasicMeas(BSC6910,BSC6900) parameter.

l The RNC calculates credit resource usage based on the reported amount.This feature maximizes the RNC's capability to perform admission control based on creditresource usage.

WCDMA RANCE Overbooking Feature Parameter Description 2 Overview


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Figure 2-1 shows the working principle of CE Overbooking.

Figure 2-1 CE Overbooking

When the penetration rate of 2 ms TTI HSUPA UEs is high, the average HSUPA servicethroughput is low, and this feature provides the following benefits:l Reduces the amount of credit resources that will be consumed by admitted UEs.l Increases the number of admitted UEs and the number of 2 ms TTI HSUPA UEs.l Increases uplink cell throughput when Uu and Iub resources are sufficient.This feature takes effect only on uplink CE resources and HSUPA UEs.Before enabling this feature, Dynamic CE Resource Management must be enabled. For detailsabout Dynamic CE Resource Management, see the HSUPA Feature Parameter Description.

WCDMA RANCE Overbooking Feature Parameter Description 2 Overview


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3 Technical DescriptionThe CE usage that the NodeB periodically calculates and reports to the RNC involves thepredicted CE consumption of R99 UEs and that of HSUPA UEs. Because this feature appliesonly to HSUPA UEs, the RNC calculates the amount of credit resources that will be consumedby admitted R99 UEs based on the maximum bit rate (MBR).Table 3-1 describes the methods for calculating the credit resource usage before and after thisfeature is activated and presumes that the Dynamic CE Resource Management feature has beenenabled.

Table 3-1 Credit resource calculation methods before and after activating this featureCEOverbooking

Credit Resources That Will Be Consumed by Admitted UEs

Not activated The RNC calculates the amount of credit resources that will be consumedby admitted HSUPA UEs using the following formula:Rate = Max (GBR, Rateone RLC PDU)

WCDMA RANCE Overbooking Feature Parameter Description 3 Technical Description


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CEOverbooking

Credit Resources That Will Be Consumed by Admitted UEs

Activated The NodeB calculates the amount of credit resources consumed byadmitted UEs as follows:l For 10 ms TTI HSUPA UEs:

The NodeB adjusts the amount of credit resources that will beconsumed by each admitted UE based on the UE data rate. Theadjusted amount does not exceed the credit resource amountcorresponding to Rateone RLC PDU.

l For 2 ms TTI HSUPA UEs:The NodeB adjusts the amount of credit resources that will beconsumed by each admitted UE based on the UE data rate and thesetting of the CERSVFOR2MSUSER parameter. The adjustedamount does not exceed the credit resource amount corresponding toRateone RLC PDU.

NOTECERSVFOR2MSUSER indicates the minimum number of CEs reserved foradmitted 2 ms TTI HSUPA UEs. The parameter value ranges from 1 to 8 with adefault value of 4 (unit: CE). If this parameter is set to a value beyond its valuerange, the system uses the default parameter value. A smaller value of this parameterleads to a larger number of admitted users. In this case, the call drop rate mayincrease and user experience cannot be guaranteed. A larger value of this parameterleads to a smaller number of admitted users. In this case, the call drop rate does notincrease and user experience can be guaranteed.In the uplink, one CE equals two credits.In the downlink, one CE equals one credit.

Specifically, the CE Overbooking feature provides the following benefits:l The credit resource usage of admitted UEs is reduced.l The amount of remaining credit resources increases.l More UEs can be admitted.l More HSUPA UEs are allocated with a 2 ms TTI during a PS best effort (BE) service setup

or reconfiguration.l The probability that a cell enters the basic congestion state due to insufficient credit

resources is reduced.l The number of admission-CE-based dynamic TTI adjustments from 2 ms to 10 ms is

reduced for BE services.

WCDMA RANCE Overbooking Feature Parameter Description 3 Technical Description


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4 Credit Resource-based CACUpon receiving a service setup request, the RNC makes an admission decision based on creditresources as follows:l For a radio resource control (RRC) connection setup request, the admission is successful

if the remaining credit resources at the local cell group (if any) and NodeB levels aresufficient for the request.

l For a handover service, the admission is successful if the remaining credit resources at thelocal cell group (if any) and NodeB levels are sufficient for the service.

l For other types of services, the RNC checks whether the amount of the remaining creditresources at the local cell group (if any) and NodeB levels is greater than or equal to theUlHoCeResvSf(BSC6900,BSC6910) parameter after new services are admitted. If so, theadmission is successful.

The CE Overbooking feature performs service admission and optimization based on thepreceding decision procedure. Activating this feature brings the following advantages:l The amount of NodeB-reported credit resources decreases.l The amount of remaining credit resources on the RNC side increases.l The RNC can admit more users.Table 4-1 shows how to calculate the number of CEs required for admitting HSUPA UEs whenCE Overbooking is activated and when CE Overbooking is not activated.

WCDMA RANCE Overbooking Feature Parameter Description 4 Credit Resource-based CAC


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Table 4-1 Calculating the number of CEs required for admitting HSUPA UEs in differentscenarios

Item DCERM:DeactivatedDCCC:Activated

DCERM:DeactivatedDCCC:Deactivated

DCERM:ActivatedCEOverbooking:Activated

DCERM:ActivatedCEOverbooking:Deactivated

Calculationmethod

Calculatingbased on theHsupaInitialRate value

Calculatingbased on theGBR

For 2 ms TTI UEs:Rate = MAX(CeReservedForNonEnh2msQos,MIN(Actual datarate, Rateone RLCPDU)For 10 ms TTIUEs:Rate = MIN(Actual data rate,Rateone RLC PDU)

Calculatingusing thefollowingformula:Rate = MAX(GBR, RateoneRLC PDU)

Counterproviding theconsumption ofCE resourcesfor UEadmission

VS.LC.ULCreditUsed.Mean


VS.NodeB.ULCreditUsed.Mean


For a 10 ms TTIHSUPA UE:MBR = 2 Mbit/s GBR = 64kbit/s RateoneRLC PDU = 32kbit/sHsupaInitialRate = 256 kbit/s

HsupaInitialRate = 256 kbit/sNumber of CEsfor admission =8 Ces

MBR = 2 Mbit/s Number ofCEs foradmission = 32Ces

Rateone RLC PDU =32 kbit/sActual data rate =32 kbit/sNumber of CEsfor admission =1CE

GBR = 64kbit/s,Rateone RLCPDU = 32 kbit/sNumber ofCEs foradmission = 2Ces

For a 2 ms TTIHSUPA UE:MBR = 5 Mbit/sGBR = 64 kbit/sRateone RLC PDU= 160 kbit/sHsupaInitialRate = 256 kbit/s

HsupaInitialRate = 256 kbit/sNumber of CEsfor admission =8 Ces

MBR = 5 Mbit/s Number ofCEs foradmission = 48Ces

Rateone RLC PDU =160 kbit/sActual data rate =32 kbit/sCeReservedForNonEnh2msQos = 1Number of CEsfor admission =2.4 Ces

GBR = 64kbit/s,Rateone RLCPDU = 160 kbit/s Number ofCEs foradmission = 8Ces



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In Table 4-1:l The GBR of BE services (background and interactive services) is specified by the

UlGBR parameter in the SET USERGBR (RAN11.0) and SET UUSERGBR (RAN12.0and later) commands.

l The HsupaInitialRate parameter is under the SET FRC command in RAN11.0 and theSET UFRC command in RAN12.0 and later.

l Assume that one RLC PDU contains 320 bits. Rateone RLC PDU is 32 kbit/s for a 10 ms TTIHSUPA UE and 160 kbit/s for a 2 ms TTI HSUPA UE.

l When CE Overbooking is not activated, the VS.LC.ULCreditUsed.Mean counter providesthe consumption of CE resources for UE admission. When CE Overbooking is activated,the VS.NodeB.ULCreditUsed.Mean counter provides the consumption of CE resources forUE admission, but the VS.LC.ULCreditUsed.Mean counter still works without anychanges to its calculating method. The value of the VS.LC.ULCreditUsed.Mean counteris not used for CE resource-based admission control.

l CeReservedForNonEnh2msQos provides the minimum number of CE resources reservedfor 2 ms TTI HSUPA UEs. This number is specified by the REVDPARA4 parameter inRAN14.0 and the CERSVFOR2MSUSER parameter in RAN15.0 and later.

l In this figure, CE resource consumption for UE admission by SRBs is excluded. For suchconsumption, see CE Resource Management Feature Parameter Description, regardlessof whether SRB over DCH or SRB over HSUPA is applied. For HSUPA services, if SRBsare carried over DCHs, each SRB consumes an extra CE.

l Assuming that there is a 2 ms TTI HSUPA UE whose actual rate is 32 kbit/s and theconditions for the UE are as follows: The UE transmits 40-byte packets using SF4 (mapped to 8 CEs) during 20% of its online

period, and does not transmit any data for the rest of time. CeReservedForNonEnh2msQos under the REVDPARA4 parameter (RAN14.0)

orCERSVFOR2MSUSER (RAN15.0 and later) is set to 1.The average CE consumption of the UE is 8 x 0.2 + 1 x 0.8 = 2.4. For mapping betweenthe SF and the CE consumption, see CE Resource Management Feature ParameterDescription.

The NodeB baseband board uses different processing specifications for users with differentuplink bearer services, for example, HSUPA TTI 2 ms services, HSUPA TTI 10 ms services,and R99 services. CE Overbooking enables the network to admit more users. Therefore, it isgood practice to enable PerfEnhanceSwitch(BSC6900,BSC6910):PERFENH_CELL_HSUPA_CAP_CHANGE_OPT_SWITCH. When multiple users accessthe network,l If PerfEnhanceSwitch:

PERFENH_CELL_HSUPA_CAP_CHANGE_OPT_SWITCH is disabled, the systemattempts to admit all new users using the highest service bearers supported by the terminal.In this way, accessed users occupy too many uplink processing specifications and thereforethe total number of accessed users decreases.

l If PerfEnhanceSwitch:PERFENH_CELL_HSUPA_CAP_CHANGE_OPT_SWITCH is enabled, the NodeBbaseband board dynamically selects proper uplink service bearers for users to maximize



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the number of accessed users according to actual NodeB processing specifications. If theNodeB baseband board load is higher than 82%, new user supporting 2 ms TTI is onlyallowed to set up services with 10 ms TTI. If the NodeB baseband board load is higher than87%, new user supporting HSUPA is only allowed to set up services on R99 channels.

For details about Call Admission Control (CAC) based on NodeB credit resources, see CallAdmission Control Feature Parameter Description.



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5 Basic Congestion based on NodeB CreditResources

Basic congestion at the local cell group or NodeB level is triggered when the following conditionis met:Remaining uplink credit resources at the local cell group or NodeB level < Credit resourcesmapped to UlLdrCreditSfResThd(BSC6900,BSC6910)whereUlLdrCreditSfResThd(BSC6900,BSC6910) can be set by running the MML command ADDUNODEBLDR.CE Overbooking brings the following advantages:l Increases the remaining uplink credit resources.l Relieves basic congestion because the preceding condition is less likely to be met.For details about basic congestion related to NodeB credit resources, see Load Control FeatureParameter Description.

WCDMA RANCE Overbooking Feature Parameter Description 5 Basic Congestion based on NodeB Credit Resources


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6 TTI Selection During PS BE Service Setup orReconfiguration

When a PS BE service is set up or reconfigured, TTI selection is implemented. The TTI for anHSUPA UE is set to 2 ms if all the following conditions are met:l The UE and the NodeB support 2 ms TTI.l MAP_HSUPA_TTI_2MS_SWITCH under the MapSwitch(BSC6900,BSC6910)

parameter is set to ON.l Credit resources are sufficient.l If DRA_BASE_RES_BE_TTI_RECFG_SWITCH and

DRA_BASE_RES_BE_TTI_INIT_SEL_SWITCH under the DraSwitch(BSC6900,BSC6910) parameter are set to ON, one of the following conditions must bemet: The ResourceOption(BSC6900,BSC6910) parameter is set to RTWP, and the Uu

resources are sufficient. The ResourceOption(BSC6900,BSC6910) parameter is set to Iub, and the Iub

resources are sufficient. The ResourceOption(BSC6900,BSC6910) parameter is set to CE, and the CE resources

are sufficient.l The MBR of the UE is greater than or equal to BeHsupa2msTtiRateThs

(BSC6900,BSC6910).CE Overbooking brings the following advantages: Increases the remaining uplink credit resources. Increases the number of HSUPA UEs with a 2 ms TTI. Compared with 10 ms TTI, 2

ms TTI enables HSUPA UEs to achieve a higher peak rate and a shorter schedulingdelay, which improves user experience.

For details about dynamic TTI adjustment, see HSUPA TTI Selection Feature ParameterDescription.

WCDMA RANCE Overbooking Feature Parameter Description

6 TTI Selection During PS BE Service Setup orReconfiguration


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7 Admission-CE-based Dynamic TTIAdjustment for a Single BE Service over HSUPA

The TTI for an HSUPA UE processing BE services is switched from 2 ms to 10 ms when all thefollowing conditions are met:l The credit resources at the local cell group or NodeB level are smaller than those specified

by UlTtiCreditSfResThd(BSC6900,BSC6910), indicating that the credit resources areinsufficient.

l The UE throughput is lower than the product of UpRatioFor2msTo10msBaseCE(BSC6900,BSC6910) and BeHsupa2msTtiRateThs(BSC6900,BSC6910).

CE Overbooking brings the following advantages:l Increases the remaining uplink credit resources.l Reduces the probability of admission-CE-based dynamic TTI adjustment from 2 ms to 10

ms.After CE Overbooking is activated, it is recommended thatDRA_BASE_ADM_CE_BE_TTI_RECFG_SWITCH under the DraSwitch(BSC6900,BSC6910) parameter be set to ON. IfDRA_BASE_ADM_CE_BE_TTI_RECFG_SWITCH is set to ON, the TTI for an HSUPAUE can be switched from 2 ms to 10 ms when CE resources are congested. IfDRA_BASE_ADM_CE_BE_TTI_RECFG_SWITCH is not set to ON, CE resources may beinsufficient to transmit one RLC PDU, which may result in Traffic Radio Bearer (TRB) resetand increase the call drop rate.For details about dynamic TTI adjustment, see HSUPA TTI Selection Feature ParameterDescription.

WCDMA RANCE Overbooking Feature Parameter Description

7 Admission-CE-based Dynamic TTI Adjustment for aSingle BE Service over HSUPA


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8 Related FeaturesPrerequisite Features

CE Overbooking depends on WRFD-010638 Dynamic CE Resource Management.

Mutually Exclusive FeaturesNone

Impacted FeaturesNone

WCDMA RANCE Overbooking Feature Parameter Description 8 Related Features


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9 Network ImpactSystem Capacity

CE Overbooking reduces the uplink credit resources consumed by online users. In cells with alarge number of 2 ms TTI HSUPA UEs, this feature reduces the uplink credit resourceconsumption by 10% to 40%. A cell is regarded as having a large number of 2 ms TTI HSUPAUEs when the average number of these UEs is greater than or equal to 5.This feature impacts on system capacity in the following scenarios:l In scenarios where a large number of admission rejections occur due to severe congestion

of uplink credit resources, CE Overbooking enables more UEs to be admitted. CEOverbooking also increases the average cell throughput if Uu and Iub resources aresufficient.

l In scenarios where TTI switching or load reshuffling (LDR) frequently occurs due to basiccongestion of uplink credit resources, CE Overbooking reduces the number of TTIswitching or LDR events or increases the number of 2 ms TTI HSUPA UEs.

l In scenarios where uplink credit resources are sufficient, CE Overbooking increasesremaining credit resources.

Network PerformanceCE Overbooking has the following impact on network performance:l In scenarios where a large number of admission rejections occur due to severe congestion

of uplink credit resources, CE Overbooking allows more UEs to be admitted and increasesthe radio access success rate. (This is because CE Overbooking takes the uplink trafficvolume into consideration when calculating the remaining credit resources, thereforeincreasing the availability of credit resources.) However, when more UEs transmit datasimultaneously, the HSUPA call drop rate may increase due to congestion of CE and Uuresources.

l In scenarios where TTI switching or LDR frequently occurs due to basic congestion ofuplink credit resources, the number of 2 ms TTI HSUPA UEs increases because CEOverbooking increases the availability of credit resources. However, 2 ms TTI HSUPAUEs have poorer anti-interference capabilities than 10 ms TTI HSUPA UEs. Therefore, thecall drop rate may increase in poor coverage because 2 ms TTI HSUPA UEs are morevulnerable to call drops than 10 ms TTI HSUPA UEs.

WCDMA RANCE Overbooking Feature Parameter Description 9 Network Impact


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NOTE

After CE Overbooking is enabled, the amount of credit resources consumed by admitted UEs is related tothe actual UE rate. If the amount of credit resources consumed by admitted UEs is large due to high actualUE rate, the handover success rate and the RRC connection setup success rate may decrease because thereserved resources may be consumed by admitted UEs. This problem has a low probability of occurrenceand network performance is generally not affected.

l After CE Overbooking is enabled, there is a possibility that admission rejections increaseover the Iub interface if a large number of UEs has accessed the network. However, CEOverbooking does not affect the UE access success rate.Before CE Overbooking is enabled, the RNC updates the consumption of CE resources forUE admission upon UE access or release.After CE Overbooking is enabled, the NodeB updates the consumption of CE resourcesreal-time for UE admission, calculates the average consumption of CE resources every 640ms and reports to the RNC every 1s. During the report interval, the RNC cannot learn aboutthe accurate consumption of CE resources, resulting in information inconsistency betweenthe RNC and the NodeB. Therefore, there is a possibility that some UEs are admitted bythe RNC but fail to be admitted by the NodeB.

WCDMA RANCE Overbooking Feature Parameter Description 9 Network Impact


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10 Engineering Guidelines10.1 When to Use CE Overbooking

To improve RNC's capability to perform admission control based on credit resource usage, CEOverbooking should be enabled in a network that meets all the following conditions:l There are a large number of smart phones, especially 2 ms TTI HSUPA UEs.l Credit resources are insufficient.l The RAN has rejected the access request of a UE due to uplink credit resource congestion.l The average data rate of 2 ms TTI HSUPA UEs is less than or equal to 150 kbit/s.

10.2 Required InformationBefore deploying CE Overbooking, collect the values of the following counters on the livenetwork:l VS.HSUPA.UE.Mean.CATx (x 6): measures the number of HSUPA UEs that support

the 2 ms TTI in a cell. When there are a large number of 2 ms TTI HSUPA UEs in a cell,this feature provides noticeable gains. A cell is regarded as having a large number of theseUEs when the average number of these UEs is greater than or equal to 5.

l VS.LC.ULCreditUsed.Mean: measures the uplink credit resource usage in a cell. When theuplink credit resource usage of a network is high, the average number of consumed uplinkcredit resources across cells under a base station during a busy hour exceeds 70% of thepurchased credit resources, and possibly the maximum number of consumed uplink creditresources in a cell equals to the number of the purchased credit resources. In this case,uplink credit resource congestion will easily occur.

l VS.LCC.LDR.Num.ULCE: measures the number of LDR events triggered by uplink creditresource congestion in a cell. When the counter value is large, uplink credit resources areexperiencing severe congestion.

l VS.HSUPA.TTI2to10.ADMCE.Succ: measures the number of TTI switching eventstriggered by uplink credit resource congestion in a cell. When the counter value is large,uplink credit resources are experiencing severe congestion.

l VS.HSUPA.RABEstabTTI10ms.AdmCE.Succ: measures the number of successful RABestablishments for TTI switching from 2 ms to 10 ms triggered by uplink credit resource

WCDMA RANCE Overbooking Feature Parameter Description 10 Engineering Guidelines


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congestion in a cell. When the counter value is large, CE resources are experiencing severecongestion.

l VS. RAB.FailEstabPS.ULCE.Cong and VS.RAB.FailEstabCS.ULCE.Cong: measure thenumber of admission rejections triggered by uplink credit resource congestion in a cell.When the counter value is large, CE resources are experiencing severe congestion.

l VS.HSUPA.TTI2msUserNumber.x (x = 0 to 5): measures the proportion of 2 ms TTIHSUPA UEs whose average rate is lower than 150 kbit/s. The larger the proportionindicated by VS.HSUPA.TTI2msUserNumber.0, the more the low-rate 2 ms TTI HSUPAUEs on the network, and the greater the gains of this feature.

10.3 Deployment

10.3.1 Requirementsl Dependencies on Hardware

The 3900 series base station must be configured with the WBBPb, WBBPd, WBBPf,or UBBPd board. The DBS3800 must be configured with the EBBC or EBBCd board. The BTS3812E, BTS3812A, and BTS3812AE must be configured with the EBBI,

EBOI, or EULPd board.NOTE

The CE Overbooking feature can still be activated on a NodeB when the NodeB is not configured asabove. However, this feature is beneficial only when the NodeB is configured as above.

l Dependencies on Other FeaturesBefore enabling this feature, you must enable the feature WRFD-010638 Dynamic CEResource Management.

l LicenseThe license "CE overbooking(Per NodeB)" on the NodeB side has been activated. Fordetails about how to activate the license, see License Management Feature ParameterDescription.Table 10-1 lists the license information for CE overbooking.

Table 10-1 License information for CE overbookingFeature ID Feature

NameLicense Control Item NE Sales

UnitWRFD-140212

CEOverbooking

CE overbooking(PerNodeB)

NodeB NodeB

10.3.2 Activation



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Using MML CommandsPerform the following steps to activate CE Overbooking:

Step 1 After the license is activated, the feature has been activated.Step 2 (Optional) Run the NodeB MML command SET NODEBALGPARA to set the minimum

number of CEs required for admitting 2 ms TTI HSUPA UEs. In this step, set 2ms UserMinimum Admission CE.

Step 3 (Optional) Run the RNC MML command SET UCORRMPARA. In this step, select thePERFENH_CELL_HSUPA_CAP_CHANGE_OPT_SWITCH check box under thePerformance Enhancement Switch parameter.

----End

NOTE

l It is good practice to retain the default value of 2ms User Minimum Admission CE.l It is good practice to set the parameter in step 2 so that the network can admit more users.

MML Command Examples//Setting the minimum number of CEs required for admitting an HSUPA UE with a 2 ms TTISET NODEBALGPARA: CERSVFOR2MSUSER=4;

Activation (Using the CME)After the feature license "CE overbooking(Per NodeB)" is activated, this feature is automaticallyavailable for use. However, you can perform the following steps on the CME to improve featureperformance:

NOTE

When configuring the CE Overbooking feature on the CME, perform a single configuration first, and thenperform a batch modification if required.Configure the parameters of a single object before a batch modification. Perform a batch modificationbefore logging out of the parameter setting interface.

Step 1 Configure a single object on the CME.Set parameters on the CME according to the operation sequence in Table 10-2. For instructionson how to perform the CME single configuration, see CME Single Configuration OperationGuide.

Step 2 (Optional) Modify objects in batches on the CME. (CME batch modification center)----EndTo modify objects, such as RNCs, NodeBs, cells, and external UMTS cells, in batches, click

on the CME to start the batch modification wizard. For instructions on how to perform abatch modification through the CME batch modification center, press F1 on the wizard interfaceto obtain online help.



22

Table 10-2 Configuring user groupsSN MO NE Parameter

NameParameterID

Configurable in CMEBatchModification Center

1(Optional) NODEBALGPARA

NodeB 2ms UserMinimumAdmissionCE

CERSVFOR2MSUSER

Yes

2(Optional) UCORRMPARA

RNC PerformanceEnhancement Switch

PerfEnhanceSwitch(BSC6900,BSC6910)

Yes

10.3.3 Activation ObservationPerform either of the following operations to check whether the CE Overbooking feature hasbeen successfully activated:l Check the values of the new counters VS.NodeB.ULCreditUsed.Mean,

VS.NodeB.ULCreditUsed.Max and VS.NodeB.ULCreditUsed.Min. If any of the values isnot 0, this feature has been successfully activated.

l Check the value of the real-time tracing item "Adjusted UL NodeB CE used" on the RNC.If the value is not 65535, the feature has been successfully activated. "Adjusted UL NodeBCE used" indicates the number of consumed by admitted UEs on the NodeB level after CEOverbooking is activated.

l Start an Iub interface tracing task on an RNC LMT. In the tracing results, check whetherthe NBAP_AUDIT_RSP message contains the "cE-overbooking-capable" IE. If so, thisfeature has been successfully activated.

10.3.4 DeactivationDeactivate the license for CE Overbooking on the M2000.

10.4 Performance OptimizationMonitor the following items:l Credit resources consumed by admitted UEs

Check the counters in Table 10-3 to obtain the credit resource usages after CE Overbookingis activated.



23

Table 10-3 Credit resource usages after CE Overbooking is activatedCounter DescriptionVS.NodeB.ULCreditUsed.Mean Average NodeB Credit Usage When CE

Overbooking Is EnabledVS.NodeB.ULCreditUsed.Max Maximum NodeB Credit Usage When CE

Overbooking Is EnabledVS.NodeB.ULCreditUsed.Min Minimum NodeB Credit Usage When CE

Overbooking Is Enabled

The difference between VS.NodeB.ULCreditUsed.Mean and VS.LC.ULCreditUsed.Mean is asfollows:l VS.NodeB.ULCreditUsed.Mean measures the usage of credit resources consumed by

admitted UEs on the NodeB level after CE Overbooking is activated. This counter can alsobe observed using the real-time tracing item "Adjusted UL NodeB CE used" on the RNCLMT.

l VS.LC.ULCreditUsed.Mean measures the usage of credit resources consumed by admittedUEs on the cell level before CE Overbooking is activated. This counter is measuredregardless of whether CE Overbooking is activated. This counter can also be observed usingthe real-time tracing item "UL local cell CE used" on the RNC LMT.When CE Overbooking takes effect, the value of VS.NodeB.ULCreditUsed.Mean for aNodeB is smaller than the sum of VS.LC.ULCreditUsed.Mean for all cells under thisNodeB.

l Access failure rate caused by uplink CE resource congestionAfter CE Overbooking is activated on a network with a low average HSUPA throughput,the access success failure rate caused by CE resource congestion decreases, including thePS RAB setup failure rate, CS RAB setup failure rate, and RRC connection setup failurerate caused by uplink CE resource congestion. These failure rates can be calculated usingthe following methods:The PS RAB setup failure rate caused by uplink CE resource congestion is calculated usingthe following formula: VS.RAB.FailEstabPS.ULCE.Cong/(VS.RAB.AttEstabPS.Conv +VS.RAB.AttEstabPS.Bkg + VS.RAB.AttEstabPS.Int + VS.RAB.AttEstabPS.Str).Counters in this formula are described in the following table.

Counter DescriptionVS. RAB.FailEstabPS.ULCE.Cong Number of Failed PS RAB Establishments

for Cell (UL CE Congestion)VS.RAB.AttEstabPS.Conv Number of PS Conversational RAB

Establishment Attempts for CellVS.RAB.AttEstabPS.Bkg Number of PS Background RAB

Establishment Attempts for Cell



24

Counter DescriptionVS.RAB.AttEstabPS.Int Number of PS Interactive RAB

Establishment Attempts for CellVS.RAB.AttEstabPS.Str Number of PS Streaming RAB

Establishment Attempts for Cell

The CS RAB setup failure rate caused by uplink CE resource congestion is calculated usingthe following formula: VS.RAB.FailEstabCS.ULCE.Cong/(VS.RAB.AttEstabCS.Conv +VS.RAB.AttEstabCS.Str). Counters in this formula are described in the following table.

Counter DescriptionVS. RAB.FailEstabCS.ULCE.Cong Number of Failed CS RAB Establishments

for Cell (UL CE Congestion)VS.RAB.AttEstabCS.Conv Number of CS Conversational RAB

Establishment Requests for CellVS.RAB.AttEstabCS.Str Number of CS Streaming RAB

Establishment Requests for Cell

The RRC connection setup failure rate caused by uplink CE resource congestion iscalculated using the following formula: VS.RRC.Rej.ULCE.Cong/VS.RRC.AttConnEstab.Sum. Counters in this formula are described in the following table.

Counter DescriptionVS.RRC.Rej.ULCE.Cong Number of RRC Connection Rejects for

Cell (UL CE Resource Congestion)VS.RRC.AttConnEstab.Sum Number of Processed RRC Connection

Requests for Cell

l Local cell group credit utilizationTable 10-4 lists local cell group (LCG)-level credit utilization when CE Overbooking takeseffect. The larger the counter value, the more severe the LCG-level credit congestion is.

Table 10-4 Counters measuring the LCG-level credit utilizationCounter DescriptionVS.LCG.ULCreditUsage.Mean LCG-level uplink average credit

utilization for a cell when CE Overbookingtakes effect



25

Counter DescriptionVS.LCG.ULCreditUsage.Max LCG-level uplink maximum credit

utilization for a cell when CE Overbookingtakes effect

l Number of 2 ms TTI HSUPA UEs

After activating CE Overbooking on a network with a low average HSUPA throughput,check the counter in Table 10-5 to determine whether the number of 2 ms TTI HSUPAUEs increases.

Table 10-5 Counter measuring the average number of 2 ms TTI HSUPA UEsCounter DescriptionVS.HSUPA.UE.Mean.TTI2ms Average number of 2 ms HUSPA usersVS.HSUPA.UE.Mean.Cell Average Number of HSUPA UEs in a CellVS.CellDCHUEs Number of UEs in CELL_DCH State for

Cell

l LDR events caused by CE congestionAfter activating CE Overbooking on a network with a low average HSUPA throughput,check the counter in Table 10-6 to determine whether the number of LDR events causedby CE congestion decreases.

Table 10-6 Counter measuring the number of LDR events caused by CE congestionCounter DescriptionVS.LCC.LDR.Num.ULCE Number of Times a Cell Is in LDR State

Due to UL CE Resource Congestion forCell

l Load on the Uu interface

After activating CE Overbooking on a network with a low average HSUPA throughput,check the counter in Table 10-7 to determine whether the load on the Uu interface increases.

Table 10-7 Counter measuring the mean received total wideband power in the cellCounter DescriptionVS.MeanRTWP Mean Power of Totally Received

Bandwidth for Cell

l Average cell throughput



26

After activating CE Overbooking on a network with a low average HSUPA throughput andsufficient Uu and Iub resources, check the counter in Table 10-8 to determine whether theaverage cell throughput increases.

Table 10-8 Counter measuring the average cell throughputCounter DescriptionVS.HSUPA.MeanBitRate Average Throughput of HSUPA Users for

Cell

l Soft handover success rateAfter CE Overbooking is activated, statistics on the consumed admission CEs may beinconsistent between the RNC and the NodeB. The CEs reserved for soft handovers may beconsumed by the existing users. Therefore, there is a low probability that the soft handoversuccess rate decreases. In most cases, network performance is not affected.

Table 10-9 Counters measuring the soft handover success rateCounter DescriptionVS.SHO.SuccRLAdd Number of Successful Radio Link Additions

in Soft Handover for CellVS.SHO.SuccRLDel Number of Successful Radio Link Deletions

in Soft Handover for CellVS.SHO.AttRLAdd Number of Radio Link Addition Attempts in

Soft Handover for CellVS.SHO.AttRLDel Number of Radio Link Deletion Attempts in

Soft Handover for Cell

l HSUPA call drop rateActivating CE Overbooking enables the network to admit more users. If the users on the networkinitiate data transmission simultaneously, CEs configured for the network may be insufficient.As a result, the HSUPA users experience more call drops.

Table 10-10 Counters measuring the HSUPA call drop rateCounter DescriptionVS.HSUPA.RAB.AbnormRel Number of HSUPA RABs Abnormal

Releases for CellVS.HSUPA.RAB.AbnormRel.E2P Number of RABs Abnormally Released for

PS HSUPA Services during the StateTransition from CELL_DCH to CELL_PCHor URA_PCH for Cell



27

Counter DescriptionVS.HSUPA.RAB.AbnormRel Number of HSUPA RABs Abnormal

Releases for CellVS.HSUPA.RAB.NormRel Number of HSUPA RABs Normal Released

for CellVS.HSUPA.HHO.E2D.SuccOutIntraFreq Number of Successful HSUPA Intra-

Frequency Hard Handovers for Cell(EDCHto DCH)

VS.HSUPA.HHO.E2D.SuccOutInterFreq Number of Successful HSUPA Inter-Frequency Hard Handovers for Cell(EDCHto DCH)

VS.HSUPA.E2F.Succ Number of Successful Channel Conversionsfrom EDCH to FACH for HSUPA Service forCell

VS.HSUPA.E2D.Succ Number of Successful Channel Conversionsfrom EDCH to DCH for HSUPA Service forCell

VS.HSUPA.E2P.Succ Number of Successful Times That a UEPerforming HSUPA Services Transits toCELL_PCH or URA_PCH State for cell

l Admission rejections on the Iub interfaceActivating CE Overbooking increases the RAB setup success rate. However, statistics on theconsumed admission CEs may be inconsistent between the RNC and the NodeB after CEOverbooking is activated. There is a possibility that some UEs are admitted by the RNC but failto be admitted by the NodeB. Therefore, admission rejections on the Iub interface increase.

Table 10-11 Counters measuring the admission rejections on the Iub interfaceCounter DescriptionRLM.FailRLAddIub.Cong Number of Iub Interface Radio Link Addition

Failures for Cell (Congestion)VS.IUB.FailRLRecfg.Cong Number of Iub Interface Radio Link

Synchronous Reconfiguration Failures forCell (Congestion)

RLM.FailRLSetupIub.Cong Number of Iub Interface Radio Link SetupFailures for Cell (Congestion)



28

10.5 Parameter OptimizationIf the call drop rate increases due to insufficient CE resources after this feature is enabled, it isrecommended that CERSVFOR2MSUSER be set to a larger value.

10.6 TroubleshootingNone



29

11 ParametersTable 11-1 Parameter description

Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

CERSVFOR2MSUSER

BTS3900,BTS3900WCDMA

SETNODEBALGPARALSTNODEBALGPARA

WRFD-140212

CEOverbooking

Meaning: Indicates the minimum number of CEs foradmitting 2 ms users when CE Overbooking is enabled.GUI Value Range: 1~8Unit: NoneActual Value Range: 1~8Default Value: 4

WCDMA RANCE Overbooking Feature Parameter Description 11 Parameters


30

Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

PerfEnhanceSwitch

BSC6900

SETUCORRMPARA

WRFD-021104WRFD-010202WRFD-020400WRFD-01061004WRFD-02060501WRFD-020402WRFD-02040003WRFD-01061404WRFD-01061403

Emergency CallUE StateinConnected Mode(CELL-DCH,CELL-PCH,URA-PCH,CELL-FACH)DRDIntroductionPackageHSDPAPowerControlSRNSRelocation (UENotInvolved)MeasurementBasedDirectRetryInterSystemRedirectHSUPA2ms/10msTTIHandoverHSUPA2ms TTI

Meaning: 1. PERFENH_AMR_SPEC_BR_SWITCH:When this switch is turned on, the procedure specific toAMR service establishment takes effect. 2.PERFENH_AMR_TMPLT_SWITCH: When thisswitch is turned on, the AMR template takes effect. 3.PERFENH_SRB_TMPLT_SWITCH: When thisswitch is turned on, the SRB template takes effect. 4.PERFENH_OLPC_TMPLT_SWITCH: When thisswitch is turned on, the OLPC template takes effect. 5.PERFENH_AMR_SP_TMPLT_SWITCH: When thisswitch is turned on, the AMR parameter template takeseffect. 6.PERFENH_INTRAFREQ_MC_TMPLT_SWITCH:When this switch is turned on, the intra-frequencymeasurement control template takes effect. 7.PERFENH_INTERRAT_PENALTY_50_SWITCH:After a UE fails to be handed over to a 2G cell duringan inter-RAT handover, the RNC forbids the UE toattempt a handover to the 2G cell in a certain period.When this switch is turned on, the period is 50s. Whenthis switch is turned off, the period is 30s. 8.PERFENH_SRB_OVER_HSUPA_TTI10_SWITCH:When this switch is turned on, the uplink SRBs ofHSUPA 10 ms non-conversational services are alwayscarried on DCHs, and the original parameter Type ofChannel Preferably Carrying Signaling RB is invalid.When this switch is turned off, SRBs for HSUPA 10 msnon-conversational services can be carried on HSUPAchannels when the original parameter Type of ChannelPreferably Carrying Signaling RB is set to HSUPA orHSPA. The switch is set to OFF by default. 9.PERFENH_HSUPA_TTI2_ENHANCE_SWITCH:When this switch is turned on, the single-user peak-rateimprovement algorithm of HSUPA 2 ms TTI is enabled.When this switch is turned off, the algorithm is disabled.The switch is set to OFF by default. 10.PERFENH_UU_P2D_CUC_OPT_SWITCH: Whenthis switch is turned on, the P2D cell update confirmmessage simplification algorithm takes effect. Whenthis switch is turned off, the algorithm does not takeeffect. By default, this switch is turned off. 11.PERFENH_RL_RECFG_SIR_CONSIDER_SWITCH: This check box controls whether the RNC considersthe converged SIRTarget value that is used before radiolink reconfiguration in outer loop power controlperformed after radio link reconfiguration. If the checkbox is not selected, the RNC sends the initial SIRTarget



31

Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

value used after radio link reconfiguration to theNodeB.If the check box is selected, the RNC selects amore appropriate value from the initial SIRTarget valueused after radio link reconfiguration and the convergedSIRTarget value used before radio link reconfiguration.Then the RNC sends the selected value to the NodeB.Setting of this check box takes effect only when thePC_RL_RECFG_SIR_TARGET_CARRY_SWITCHcheck box is selected. 12.PERFENH_RRC_REDIR_PROTECT_SWITCH:When this switch is turned on, The mechanism to avoidendless back-and-forth RRC-redirections takes effect.The switch is set to OFF by default. 13.PERFENH_H2F_OPT_SWITCH: whether to enablethe optimized algorithm for HSPA UE state transitionfrom CELL_DCH to CELL_FACH (also referred to asH2F state transition). When the switch is turned on, theoptimized H2F state transition algorithm is enabled, andevent 4A measurement of traffic volume or throughputis added to the state transition procedure. The addedevent 4A measurement prevents an H2F state transitionwhen data is being transmitted. 14.PERFENH_PSTRAFFIC_P2H_SWITCH: When theswitch is turned on and a CELL_PCH/URA_PCH-to-CELL_DCH (P2D for short) state transition is triggeredfor a PS service, the PS service can be set up on HSPAchannels after the state transition. When the switch isturned off, PS services can be set up only on DCHs aftera P2D state transition. This switch is turned off bydefault. 15.PERFENH_VIP_USER_PCHR_MR_SWITCH:When this switch is turned on, VIP UEs report theirtransmit power to the RNC when required andperiodically measure signal quality of intra-frequencycells. In addition, these UEs measure the downlinkBLER, the NodeB measures the uplink SIR, and theRNC records the measurement results. 16.PERFENH_TX_INTERRUPT_AFT_TRIG_SWITCH: Switch for including the Tx interruption after triggerIE in the uplink 4A traffic volume measurement controlmessage. When this switch is turned on, the uplink 4Atraffic volume measurement control message from RNCincludes the Tx interruption after trigger IE for UEs thatare in the CELL_FACH or enhanced CELL_FACHstate and processing PS BE services. The value of thisIE can be changed by running the "SETUUESTATETRANS" command. 17.



32

Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

PERFENH_CELL_HSUPA_CAP_CHANGE_OPT_SWITCH: The NodeB baseband board uses differentprocessing specifications for users with different uplinkbearer services, for example, HSUPA TTI 2 msservices, HSUPA TTI 10 ms services, and R99 services.When serving a large number of users, the systemcannot guarantee that all users can access the networkwith the highest service bearer supported by UEs. Thisswitch controls whether the RNC allocatescorresponding channels for new users based on the cellcapability reported through the NodeB private interface.When this switch is turned on, the RNC dynamicallyselects an appropriate uplink service bearer andallocates corresponding channels for new users tomaximize the system capacity based on the actualNodeB processing specifications. When this switch isturned off, the optimization process is disabled. 18.PERFENH_HSUPA_TTI_RECFG_PROC_OPT_SWITCH: Whether to use the optimized TTI switchingalgorithm for BE services When this switch is turnedoff, the optimized algorithm does not take effect. Theoriginal mechanism is implemented. When this switchis turned on, the optimized algorithm takes effect. AfterHSUPA services are configured or reconfigured with 10ms TTI due to network resource (admission CEs,RTWP, consumed Iub bandwidth, or consumed CEs)congestion or insufficient coverage, these UEs cannotchange to use 2 ms TTI if no data needs to betransmitted. 19.PERFENH_DOWNLOAD_ENHANCE_SWITCH:Whether to activate the algorithm for increasing thesingle-threaded download rate. 20.PERFENH_OLPC_BLER_COEF_ADJUST: Switchfor adjusting the BLER coefficient specific to CSservices based on the best cell's uplink load status. Whenthis switch is turned on, the outer loop power controlalgorithm uses the target BLER set by the OMU boardif the best cell's uplink load status is LDR or OLC. If thestatus is neither LDR nor OLC, this algorithm uses thistarget BLER after being divided by five. 21.PERFENH_EMG_AGPS_MC_DELAY_SWITCH:Whether to enable the function of delaying the sendingof an RRC_MEAS_CTRL message containing AGPSinformation when an emergency call is made. When thisswitch is turned on, the RNC delays the sending of thismessage until the emergency call is successfully set up.When this switch is turned off, the RNC sends this



33

Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

message upon receiving aLOCATION_REPORTING_CONTROL messagefrom the CN. 22.PERFENH_MULTI_RLS_CQI_PARA_OPT_SWITCH: Whether to enable a UE having multiple RLSs to usethe value of "CQIReF" and the value of "CQIFbCk" thatare for UEs having only one RLS. The two parameterscan be set by running the "SET UHSDPCCH" and"ADD UCELLHSDPCCH" commands. When thisswitch is turned off, the UE does not use the values ofthe two parameters that are for UEs having only oneRLS. When this switch is turned on, the UE uses thevalues of the two parameters that are for UEs havingonly one RLS. 23.PERFENH_RELOC_IE_CALCTIMEFORCIP_SWITCH: Whether to enable a RELOCATION REQUIREDmessage to contain the IE calculationTimeForCipher-ing. When this switch is turned on, static relocationrequest messages contain the IE calculationTimeForCi-phering. 24.PERFENH_IS_TIMEOUT_TRIG_DRD_SWITCH:Whether to trigger the DRD procedure and channelswitchover from E-DCH or HS-DSCH to DCH whenmessages transmitted over the Uu and Iub interfaces donot arrive in time. When this switch is turned off, theDRD procedure and channel switchover from E-DCHor HS-DSCH to DCH are not triggered if messagestransmitted over the Uu and Iub interfaces do not arrivein time. When this switch is turned on, the DRDprocedure and channel switchover from E-DCH or HS-DSCH to DCH are triggered if messages transmittedover the Uu and Iub interfaces do not arrive in time. 25.PERFENH_CELL_CACLOAD_BROADCAST_AMEND: Whether to consider CE or code resource usagewhen determining the resource status of a cell whoseserving boards or CP sub-systems are different fromthose of its neighboring cells. When this switch is turnedon, the RNC determines the resource status of such acell based on power, CE, and code resource usage. Ifpower, CE, or code resources in a cell becomecongested, the RNC determines that the cell experiencesresource congestion. When this switch is turned off, theRNC determines the resource status of such a cell basedon power resource usage only. 26.PERFENH_MBDR_TARCELLSEL_OPT_SWITCH:When this switch is turned on, candidate cells are rankedby "InterFreqMeasQuantity" (in the "ADD



34

Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

UCELLMBDRINTERFREQ" command) for MBDR,and the cell with the best signal quality is selected as thetarget cell. When this switch is turned off, candidatecells are not ranked by InterFreqMeasQuantity forMBDR. 27.PERFENH_RRC_DRD_PREADMISSION_SWITCH: Whether the RNC makes a pre-admission decision onintra-RAT DRDs or redirections during an RRCconnection setup. When this switch is turned on, theRNC makes a pre-admission decision on intra-RATDRDs or redirections during an RRC connection setup.When this switch is turned off, the RNC does not makea pre-admission decision on intra-RAT DRDs orredirections during an RRC connection setup. 28.PERFENH_RRC_WEAK_REDIR_SWITCH:Whether to activate the RRC redirection in weakcoverage algorithm. When this switch is turned on, UEslocated in weak coverage are redirected to theneighboring GSM cell through RRC redirection. Whenthis switch is turned off, this algorithm is disabled. 29.PERFENH_L2U_CSFB_COMMCALL_SWITCH:Whether to preferentially admit UEs processing PSservices who are involved in CS fallbacks. When thisswitch is turned on, the non-real-time PS services of theUE involved in a CS fallback are switched to a DCHwith a data rate of 8 kbit/s before the access to the UMTSnetwork. For the real-time PS services, the UE followsthe standard access procedure. If the access fails and the"PreemptAlgoSwitch" parameter under the "SETUQUEUEPREEMPT" command is turned on, the UEcan preempt other UEs' resources. If this switch isturned off, the UE has to try to access the network as acommon PS UE. 30.PERFENH_DLBLINDDETECT_WHEN_ONLYSR-BONDCH: This parameter controls whether to enableblind detection for the HSDPA user-associated single-signaling R99 channel. When the switch specified bythis parameter is turned on, blind detection is enabled.31.PERFENH_DLBLINDDETECT_WHEN_SRBAM-RONDCH: This parameter controls whether to enableblind detection for the HSDPA user-associated AMRR99 channel. When the switch specified by thisparameter is turned on, blind detection is enabled if theHSDPA service has been set up and there are signalingand AMR traffic carried on the R99 channel. 32.PERFENH_R6_HSUPA_TTI_10MSTO2MS_LIMIT:



35

Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

Whether to allow R6 UEs to switch from HSUPA 10 msto 2 ms TTI. When the switch is turned on, thisswitching is not allowed for R6 UEs. When the switchis turned off, this limit does not work. This parameter isan advanced parameter. To modify this parameter,contact Huawei Customer Service Center for technicalsupport.GUI Value Range:PERFENH_AMR_SPEC_BR_SWITCH,PERFENH_AMR_TMPLT_SWITCH,PERFENH_SRB_TMPLT_SWITCH,PERFENH_OLPC_TMPLT_SWITCH,PERFENH_AMR_SP_TMPLT_SWITCH,PERFENH_INTRAFREQ_MC_TMPLT_SWITCH,PERFENH_INTERRAT_PENALTY_50_SWITCH,PERFENH_SRB_OVER_HSUPA_TTI10_SWITCH,PERFENH_HSUPA_TTI2_ENHANCE_SWITCH,PERFENH_UU_P2D_CUC_OPT_SWITCH,PERFENH_RL_RECFG_SIR_CONSIDER_SWITCH, PERFENH_RRC_REDIR_PROTECT_SWITCH,PERFENH_H2F_OPT_SWITCH,PERFENH_PSTRAFFIC_P2H_SWITCH,PERFENH_VIP_USER_PCHR_MR_SWITCH,PERFENH_TX_INTERRUPT_AFT_TRIG_SWITCH,PERFENH_CELL_HSUPA_CAP_CHANGE_OPT_SWITCH,PERFENH_HSUPA_TTI_RECFG_PROC_OPT_SWITCH,PERFENH_DOWNLOAD_ENHANCE_SWITCH,PERFENH_OLPC_BLER_COEF_ADJUST,PERFENH_EMG_AGPS_MC_DELAY_SWITCH,PERFENH_MULTI_RLS_CQI_PARA_OPT_SWITCH,PERFENH_RELOC_IE_CALCTIMEFORCIP_SWITCH,PERFENH_IS_TIMEOUT_TRIG_DRD_SWITCH,PERFENH_CELL_CACLOAD_BROADCAST_AMEND,PERFENH_MBDR_TARCELLSEL_OPT_SWITCH,PERFENH_RRC_DRD_PREADMISSION_SWITCH, PERFENH_RRC_WEAK_REDIR_SWITCH,PERFENH_L2U_CSFB_COMMCALL_SWITCH,PERFENH_DLBLINDDETECT_WHEN_ONLYSR-BONDCH,PERFENH_DLBLINDDETECT_WHEN_SRBAM-



36

Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

RONDCH,PERFENH_R6_HSUPA_TTI_10MSTO2MS_LIMITUnit: NoneActual Value Range:PERFENH_AMR_SPEC_BR_SWITCH,PERFENH_AMR_TMPLT_SWITCH,PERFENH_SRB_TMPLT_SWITCH,PERFENH_OLPC_TMPLT_SWITCH,PERFENH_AMR_SP_TMPLT_SWITCH,PERFENH_INTRAFREQ_MC_TMPLT_SWITCH,PERFENH_INTERRAT_PENALTY_50_SWITCH,PERFENH_SRB_OVER_HSUPA_TTI10_SWITCH,PERFENH_HSUPA_TTI2_ENHANCE_SWITCH,PERFENH_UU_P2D_CUC_OPT_SWITCH,PERFENH_RL_RECFG_SIR_CONSIDER_SWITCH, PERFENH_RRC_REDIR_PROTECT_SWITCH,PERFENH_H2F_OPT_SWITCH,PERFENH_PSTRAFFIC_P2H_SWITCH,PERFENH_VIP_USER_PCHR_MR_SWITCH,PERFENH_TX_INTERRUPT_AFT_TRIG_SWITCH,PERFENH_CELL_HSUPA_CAP_CHANGE_OPT_SWITCH,PERFENH_HSUPA_TTI_RECFG_PROC_OPT_SWITCH,PERFENH_DOWNLOAD_ENHANCE_SWITCH,PERFENH_OLPC_BLER_COEF_ADJUST,PERFENH_EMG_AGPS_MC_DELAY_SWITCH,PERFENH_MULTI_RLS_CQI_PARA_OPT_SWITCH,PERFENH_RELOC_IE_CALCTIMEFORCIP_SWITCH,PERFENH_IS_TIMEOUT_TRIG_DRD_SWITCH,PERFENH_CELL_CACLOAD_BROADCAST_AMEND,PERFENH_MBDR_TARCELLSEL_OPT_SWITCH,PERFENH_RRC_DRD_PREADMISSION_SWITCH, PERFENH_RRC_WEAK_REDIR_SWITCH,PERFENH_L2U_CSFB_COMMCALL_SWITCH,PERFENH_DLBLINDDETECT_WHEN_ONLYSR-BONDCH,PERFENH_DLBLINDDETECT_WHEN_SRBAM-RONDCH,PERFENH_R6_HSUPA_TTI_10MSTO2MS_LIMITDefault Value:PERFENH_AMR_SPEC_BR_SWITCH-1&PERFEN



37

Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

H_AMR_TMPLT_SWITCH-1&PERFENH_SRB_TMPLT_SWITCH-1&PERFENH_OLPC_TMPLT_SWITCH-1&PERFENH_AMR_SP_TMPLT_SWITCH-1&PERFENH_INTRAFREQ_MC_TMPLT_SWITCH-1&PERFENH_INTERRAT_PENALTY_50_SWITCH-1&PERFENH_SRB_OVER_HSUPA_TTI10_SWITCH-0&PERFENH_HSUPA_TTI2_ENHANCE_SWITCH-0&PERFENH_UU_P2D_CUC_OPT_SWITCH-0&PERFENH_RL_RECFG_SIR_CONSIDER_SWITCH-1&PERFENH_RRC_REDIR_PROTECT_SWITCH-0&PERFENH_H2F_OPT_SWITCH-0&PERFENH_PSTRAFFIC_P2H_SWITCH-0&PERFENH_VIP_USER_PCHR_MR_SWITCH-0&PERFENH_TX_INTERRUPT_AFT_TRIG_SWITCH-0&PERFENH_HSUPA_TTI_RECFG_PROC_OPT_SWITCH-0&PERFENH_DOWNLOAD_ENHANCE_SWITCH-0&PERFENH_OLPC_BLER_COEF_ADJUST-1&PERFENH_EMG_AGPS_MC_DELAY_SWITCH-0&PERFENH_MULTI_RLS_CQI_PARA_OPT_SWITCH-0&PERFENH_RELOC_IE_CALCTIMEFORCIP_SWITCH-0&PERFENH_IS_TIMEOUT_TRIG_DRD_SWITCH-0&PERFENH_CELL_CACLOAD_BROADCAST_AMEND-1&PERFENH_MBDR_TARCELLSEL_OPT_SWITCH-0&PERFENH_RRC_DRD_PREADMISSION_SWITCH-0&PERFENH_RRC_WEAK_REDIR_SWITCH-0&PERFENH_L2U_CSFB_COMMCALL_SWITCH- 0&PERFENH_DLBLINDDETECT_WHEN_ON-LYSRBONDCH-0&PERFENH_DLBLINDDETECT_WHEN_SRBAMRONDCH-0&PERFENH_R6_HSUPA_TTI_10MSTO2MS_LIMIT-0&PERFENH_CELL_HSUPA_CAP_CHANGE_OPT_SWITCH-0



38

Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

PerfEnhanceSwitch

BSC6910

SETUCORRMPARA

WRFD-021104WRFD-010202WRFD-020400WRFD-01061004WRFD-02060501WRFD-020402WRFD-02040003WRFD-01061404WRFD-01061403

Emergency CallUE StateinConnected Mode(CELL-DCH,CELL-PCH,URA-PCH,CELL-FACH)DRDIntroductionPackageHSDPAPowerControlSRNSRelocation (UENotInvolved)MeasurementBasedDirectRetryInterSystemRedirectHSUPA2ms/10msTTIHandoverHSUPA2ms TTI

Meaning: 1. PERFENH_AMR_SPEC_BR_SWITCH:When this switch is turned on, the procedure specific toAMR service establishment takes effect. 2.PERFENH_AMR_TMPLT_SWITCH: When thisswitch is turned on, the AMR template takes effect. 3.PERFENH_SRB_TMPLT_SWITCH: When thisswitch is turned on, the SRB template takes effect. 4.PERFENH_OLPC_TMPLT_SWITCH: When thisswitch is turned on, the OLPC template takes effect. 5.PERFENH_AMR_SP_TMPLT_SWITCH: When thisswitch is turned on, the AMR parameter template takeseffect. 6.PERFENH_INTRAFREQ_MC_TMPLT_SWITCH:When this switch is turned on, the intra-frequencymeasurement control template takes effect. 7.PERFENH_INTERRAT_PENALTY_50_SWITCH:After a UE fails to be handed over to a 2G cell duringan inter-RAT handover, the RNC forbids the UE toattempt a handover to the 2G cell in a certain period.When this switch is turned on, the period is 50s. Whenthis switch is turned off, the period is 30s. 8.PERFENH_SRB_OVER_HSUPA_TTI10_SWITCH:When this switch is turned on, the uplink SRBs ofHSUPA 10 ms non-conversational services are alwayscarried on DCHs, and the original parameter Type ofChannel Preferably Carrying Signaling RB is invalid.When this switch is turned off, SRBs for HSUPA 10 msnon-conversational services can be carried on HSUPAchannels when the original parameter Type of ChannelPreferably Carrying Signaling RB is set to HSUPA orHSPA. The switch is set to OFF by default. 9.PERFENH_HSUPA_TTI2_ENHANCE_SWITCH:When this switch is turned on, the single-user peak-rateimprovement algorithm of HSUPA 2 ms TTI is enabled.When this switch is turned off, the algorithm is disabled.The switch is set to OFF by default. 10.PERFENH_UU_P2D_CUC_OPT_SWITCH: Whenthis switch is turned on, the P2D cell update confirmmessage simplification algorithm takes effect. Whenthis switch is turned off, the algorithm does not takeeffect. By default, this switch is turned off. 11.PERFENH_RL_RECFG_SIR_CONSIDER_SWITCH: This check box controls whether the RNC considersthe converged SIRTarget value that is used before radiolink reconfiguration in outer loop power controlperformed after radio link reconfiguration. If the checkbox is not selected, the RNC sends the initial SIRTarget



39

Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

value used after radio link reconfiguration to theNodeB.If the check box is selected, the RNC selects amore appropriate value from the initial SIRTarget valueused after radio link reconfiguration and the convergedSIRTarget value used before radio link reconfiguration.Then the RNC sends the selected value to the NodeB.Setting of this check box takes effect only when thePC_RL_RECFG_SIR_TARGET_CARRY_SWITCHcheck box is selected. 12.PERFENH_RRC_REDIR_PROTECT_SWITCH:When this switch is turned on, The mechanism to avoidendless back-and-forth RRC-redirections takes effect.The switch is set to OFF by default. 13.PERFENH_H2F_OPT_SWITCH: whether to enablethe optimized algorithm for HSPA UE state transitionfrom CELL_DCH to CELL_FACH (also referred to asH2F state transition). When the switch is turned on, theoptimized H2F state transition algorithm is enabled, andevent 4A measurement of traffic volume or throughputis added to the state transition procedure. The addedevent 4A measurement prevents an H2F state transitionwhen data is being transmitted. 14.PERFENH_PSTRAFFIC_P2H_SWITCH: When theswitch is turned on and a CELL_PCH/URA_PCH-to-CELL_DCH (P2D for short) state transition is triggeredfor a PS service, the PS service can be set up on HSPAchannels after the state transition. When the switch isturned off, PS services can be set up only on DCHs aftera P2D state transition. This switch is turned off bydefault. 15.PERFENH_VIP_USER_PCHR_MR_SWITCH:When this switch is turned on, VIP UEs report theirtransmit power to the RNC when required andperiodically measure signal quality of intra-frequencycells. In addition, these UEs measure the downlinkBLER, the NodeB measures the uplink SIR, and theRNC records the measurement results. 16.PERFENH_TX_INTERRUPT_AFT_TRIG_SWITCH: Switch for including the Tx interruption after triggerIE in the uplink 4A traffic volume measurement controlmessage. When this switch is turned on, the uplink 4Atraffic volume measurement control message from RNCincludes the Tx interruption after trigger IE for UEs thatare in the CELL_FACH or enhanced CELL_FACHstate and processing PS BE services. The value of thisIE can be changed by running the "SETUUESTATETRANS" command. 17.



40

Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

PERFENH_CELL_HSUPA_CAP_CHANGE_OPT_SWITCH: The NodeB baseband board uses differentprocessing specifications for users with different uplinkbearer services, for example, HSUPA TTI 2 msservices, HSUPA TTI 10 ms services, and R99 services.When serving a large number of users, the systemcannot guarantee that all users can access the networkwith the highest service bearer supported by UEs. Thisswitch controls whether the RNC allocatescorresponding channels for new users based on the cellcapability reported through the NodeB private interface.When this switch is turned on, the RNC dynamicallyselects an appropriate uplink service bearer andallocates corresponding channels for new users tomaximize the system capacity based on the actualNodeB processing specifications. When this switch isturned off, the optimization process is disabled. 18.PERFENH_HSUPA_TTI_RECFG_PROC_OPT_SWITCH: Whether to use the optimized TTI switchingalgorithm for BE services When this switch is turnedoff, the optimized algorithm does not take effect. Theoriginal mechanism is implemented. When this switchis turned on, the optimized algorithm takes effect. AfterHSUPA services are configured or reconfigured with 10ms TTI due to network resource (admission CEs,RTWP, consumed Iub bandwidth, or consumed CEs)congestion or insufficient coverage, these UEs cannotchange to use 2 ms TTI if no data needs to betransmitted. 19.PERFENH_DOWNLOAD_ENHANCE_SWITCH:Whether to activate the algorithm for increasing thesingle-threaded download rate. 20.PERFENH_OLPC_BLER_COEF_ADJUST: Switchfor adjusting the BLER coefficient specific to CSservices based on the best cell's uplink load status. Whenthis switch is turned on, the outer loop power controlalgorithm uses the target BLER set by the OMU boardif the best cell's uplink load status is LDR or OLC. If thestatus is neither LDR nor OLC, this algorithm uses thistarget BLER after being divided by five. 21.PERFENH_EMG_AGPS_MC_DELAY_SWITCH:Whether to enable the function of delaying the sendingof an RRC_MEAS_CTRL message containing AGPSinformation when an emergency call is made. When thisswitch is turned on, the RNC delays the sending of thismessage until the emergency call is successfully set up.When this switch is turned off, the RNC sends this



41

Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

message upon receiving aLOCATION_REPORTING_CONTROL messagefrom the CN. 22.PERFENH_MULTI_RLS_CQI_PARA_OPT_SWITCH: Whether to enable a UE having multiple RLSs to usethe value of "CQIReF" and the value of "CQIFbCk" thatare for UEs having only one RLS. The two parameterscan be set by running the "SET UHSDPCCH" and"ADD UCELLHSDPCCH" commands. When thisswitch is turned off, the UE does not use the values ofthe two parameters that are for UEs having only oneRLS. When this switch is turned on, the UE uses thevalues of the two parameters that are for UEs havingonly one RLS. 23.PERFENH_RELOC_IE_CALCTIMEFORCIP_SWITCH: Whether to enable a RELOCATION REQUIREDmessage to contain the IE calculationTimeForCipher-ing. When this switch is turned on, static relocationrequest messages contain the IE calculationTimeForCi-phering. 24.PERFENH_IS_TIMEOUT_TRIG_DRD_SWITCH:Whether to trigger the DRD procedure and channelswitchover from E-DCH or HS-DSCH to DCH whenmessages transmitted over the Uu and Iub interfaces donot arrive in time. When this switch is turned off, theDRD procedure and channel switchover from E-DCHor HS-DSCH to DCH are not triggered if messagestransmitted over the Uu and Iub interfaces do not arrivein time. When this switch is turned on, the DRDprocedure and channel switchover from E-DCH or HS-DSCH to DCH are triggered if messages transmittedover the Uu and Iub interfaces do not arrive in time. 25.PERFENH_CELL_CACLOAD_BROADCAST_AMEND: Whether to consider CE or code resource usagewhen determining the resource status of a cell whoseserving boards or CP sub-systems are different fromthose of its neighboring cells. When this switch is turnedon, the RNC determines the resource status of such acell based on power, CE, and code resource usage. Ifpower, CE, or code resources in a cell becomecongested, the RNC determines that the cell experiencesresource congestion. When this switch is turned off, theRNC determines the resource status of such a cell basedon power resource usage only. 26.PERFENH_MBDR_TARCELLSEL_OPT_SWITCH:When this switch is turned on, candidate cells are rankedby "InterFreqMeasQuantity" (in the "ADD



42

Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

UCELLMBDRINTERFREQ" command) for MBDR,and the cell with the best signal quality is selected as thetarget cell. When this switch is turned off, candidatecells are not ranked by InterFreqMeasQuantity forMBDR. 27.PERFENH_RRC_DRD_PREADMISSION_SWITCH: Whether the RNC makes a pre-admission decision onintra-RAT DRDs or redirections during an RRCconnection setup. When this switch is turned on, theRNC makes a pre-admission decision on intra-RATDRDs or redirections during an RRC connection setup.When this switch is turned off, the RNC does not makea pre-admission decision on intra-RAT DRDs orredirections during an RRC connection setup. 28.PERFENH_RRC_WEAK_REDIR_SWITCH:Whether to activate the RRC redirection in weakcoverage algorithm. When this switch is turned on, UEslocated in weak coverage are redirected to theneighboring GSM cell through RRC redirection. Whenthis switch is turned off, this algorithm is disabled. 29.PERFENH_L2U_CSFB_COMMCALL_SWITCH:Whether to preferentially admit UEs processing PSservices who are involved in CS fallbacks. When thisswitch is turned on, the non-real-time PS services of theUE involved in a CS fallback are switched to a DCHwith a data rate of 8 kbit/s before the access to the UMTSnetwork. For the real-time PS services, the UE followsthe standard access procedure. If the access fails and the"PreemptAlgoSwitch" parameter under the "SETUQUEUEPREEMPT" command is turned on, the UEcan preempt other UEs' resources. If this switch isturned off, the UE has to try to access the network as acommon PS UE. 30.PERFENH_DLBLINDDETECT_WHEN_ONLYSR-BONDCH: This parameter controls whether to enableblind detection for the HSDPA user-associated single-signaling R99 channel. When the switch specified bythis parameter is turned on, blind detection is enabled.31.PERFENH_DLBLINDDETECT_WHEN_SRBAM-RONDCH: This parameter controls whether to enableblind detection for the HSDPA user-associated AMRR99 channel. When the switch specified by thisparameter is turned on, blind detection is enabled if theHSDPA service has been set up and there are signalingand AMR traffic carried on the R99 channel. 32.PERFENH_R6_HSUPA_TTI_10MSTO2MS_LIMIT:



43

Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

Whether to allow R6 UEs to switch from HSUPA 10 msto 2 ms TTI. When the switch is turned on, thisswitching is not allowed for R6 UEs. When the switchis turned off, this limit does not work. This parameter isan advanced parameter. To modify this parameter,contact Huawei Customer Service Center for technicalsupport.GUI Value Range:PERFENH_AMR_SPEC_BR_SWITCH,PERFENH_AMR_TMPLT_SWITCH,PERFENH_SRB_TMPLT_SWITCH,PERFENH_OLPC_TMPLT_SWITCH,PERFENH_AMR_SP_TMPLT_SWITCH,PERFENH_INTRAFREQ_MC_TMPLT_SWITCH,PERFENH_INTERRAT_PENALTY_50_SWITCH,PERFENH_SRB_OVER_HSUPA_TTI10_SWITCH,PERFENH_HSUPA_TTI2_ENHANCE_SWITCH,PERFENH_UU_P2D_CUC_OPT_SWITCH,PERFENH_RL_RECFG_SIR_CONSIDER_SWITCH, PERFENH_RRC_REDIR_PROTECT_SWITCH,PERFENH_H2F_OPT_SWITCH,PERFENH_PSTRAFFIC_P2H_SWITCH,PERFENH_VIP_USER_PCHR_MR_SWITCH,PERFENH_TX_INTERRUPT_AFT_TRIG_SWITCH,PERFENH_CELL_HSUPA_CAP_CHANGE_OPT_SWITCH,PERFENH_HSUPA_TTI_RECFG_PROC_OPT_SWITCH,PERFENH_DOWNLOAD_ENHANCE_SWITCH,PERFENH_OLPC_BLER_COEF_ADJUST,PERFENH_EMG_AGPS_MC_DELAY_SWITCH,PERFENH_MULTI_RLS_CQI_PARA_OPT_SWITCH,PERFENH_RELOC_IE_CALCTIMEFORCIP_SWITCH,PERFENH_IS_TIMEOUT_TRIG_DRD_SWITCH,PERFENH_CELL_CACLOAD_BROADCAST_AMEND,PERFENH_MBDR_TARCELLSEL_OPT_SWITCH,PERFENH_RRC_DRD_PREADMISSION_SWITCH, PERFENH_RRC_WEAK_REDIR_SWITCH,PERFENH_L2U_CSFB_COMMCALL_SWITCH,PERFENH_DLBLINDDETECT_WHEN_ONLYSR-BONDCH,PERFENH_DLBLINDDETECT_WHEN_SRBAM-



44

Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

RONDCH,PERFENH_R6_HSUPA_TTI_10MSTO2MS_LIMITUnit: NoneActual Value Range:PERFENH_AMR_SPEC_BR_SWITCH,PERFENH_AMR_TMPLT_SWITCH,PERFENH_SRB_TMPLT_SWITCH,PERFENH_OLPC_TMPLT_SWITCH,PERFENH_AMR_SP_TMPLT_SWITCH,PERFENH_INTRAFREQ_MC_TMPLT_SWITCH,PERFENH_INTERRAT_PENALTY_50_SWITCH,PERFENH_SRB_OVER_HSUPA_TTI10_SWITCH,PERFENH_HSUPA_TTI2_ENHANCE_SWITCH,PERFENH_UU_P2D_CUC_OPT_SWITCH,PERFENH_RL_RECFG_SIR_CONSIDER_SWITCH, PERFENH_RRC_REDIR_PROTECT_SWITCH,PERFENH_H2F_OPT_SWITCH,PERFENH_PSTRAFFIC_P2H_SWITCH,PERFENH_VIP_USER_PCHR_MR_SWITCH,PERFENH_TX_INTERRUPT_AFT_TRIG_SWITCH,PERFENH_CELL_HSUPA_CAP_CHANGE_OPT_SWITCH,PERFENH_HSUPA_TTI_RECFG_PROC_OPT_SWITCH,PERFENH_DOWNLOAD_ENHANCE_SWITCH,PERFENH_OLPC_BLER_COEF_ADJUST,PERFENH_EMG_AGPS_MC_DELAY_SWITCH,PERFENH_MULTI_RLS_CQI_PARA_OPT_SWITCH,PERFENH_RELOC_IE_CALCTIMEFORCIP_SWITCH,PERFENH_IS_TIMEOUT_TRIG_DRD_SWITCH,PERFENH_CELL_CACLOAD_BROADCAST_AMEND,PERFENH_MBDR_TARCELLSEL_OPT_SWITCH,PERFENH_RRC_DRD_PREADMISSION_SWITCH, PERFENH_RRC_WEAK_REDIR_SWITCH,PERFENH_L2U_CSFB_COMMCALL_SWITCH,PERFENH_DLBLINDDETECT_WHEN_ONLYSR-BONDCH,PERFENH_DLBLINDDETECT_WHEN_SRBAM-RONDCH,PERFENH_R6_HSUPA_TTI_10MSTO2MS_LIMITDefault Value:PERFENH_AMR_SPEC_BR_SWITCH-1&PERFEN



45

Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

H_AMR_TMPLT_SWITCH-1&PERFENH_SRB_TMPLT_SWITCH-1&PERFENH_OLPC_TMPLT_SWITCH-1&PERFENH_AMR_SP_TMPLT_SWITCH-1&PERFENH_INTRAFREQ_MC_TMPLT_SWITCH-1&PERFENH_INTERRAT_PENALTY_50_SWITCH-1&PERFENH_SRB_OVER_HSUPA_TTI10_SWITCH-0&PERFENH_HSUPA_TTI2_ENHANCE_SWITCH-0&PERFENH_UU_P2D_CUC_OPT_SWITCH-0&PERFENH_RL_RECFG_SIR_CONSIDER_SWITCH-1&PERFENH_RRC_REDIR_PROTECT_SWITCH-0&PERFENH_H2F_OPT_SWITCH-0&PERFENH_PSTRAFFIC_P2H_SWITCH-0&PERFENH_VIP_USER_PCHR_MR_SWITCH-0&PERFENH_TX_INTERRUPT_AFT_TRIG_SWITCH-0&PERFENH_HSUPA_TTI_RECFG_PROC_OPT_SWITCH-0&PERFENH_DOWNLOAD_ENHANCE_SWITCH-0&PERFENH_OLPC_BLER_COEF_ADJUST-1&PERFENH_EMG_AGPS_MC_DELAY_SWITCH-0&PERFENH_MULTI_RLS_CQI_PARA_OPT_SWITCH-0&PERFENH_RELOC_IE_CALCTIMEFORCIP_SWITCH-0&PERFENH_IS_TIMEOUT_TRIG_DRD_SWITCH-0&PERFENH_CELL_CACLOAD_BROADCAST_AMEND-1&PERFENH_MBDR_TARCELLSEL_OPT_SWITCH-0&PERFENH_RRC_DRD_PREADMISSION_SWITCH-0&PERFENH_RRC_WEAK_REDIR_SWITCH-0&PERFENH_L2U_CSFB_COMMCALL_SWITCH- 0&PERFENH_DLBLINDDETECT_WHEN_ON-LYSRBONDCH-0&PERFENH_DLBLINDDETECT_WHEN_SRBAMRONDCH-0&PERFENH_R6_HSUPA_TTI_10MSTO2MS_LIMIT-0&PERFENH_CELL_HSUPA_CAP_CHANGE_OPT_SWITCH-0



46

Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

TenMsecForUlBasicMeas

BSC6910

SETULDM

WRFD-020102

LoadMeasurement

Meaning: The value of this parameter must be less thanthe product of 1/2 and the value of either of the followingparameters in the "SET ULDCPERIOD" command:1."LdrPeriodTimerLen" 2. "OlcPeriodTimerLen" If the"ChoiceRprtUnitForUlBasicMeas" parameter is set toTEN_MSEC, the value of this parameter must satisfythe following relationship: TenMsecForUlBasicMeas xUlbAvgFilterLen x 10 < IntraFreqUlbPeriodTimerLenx 1000 If the "ChoiceRprtUnitForUlBasicMeas"parameter is set to MIN, the value of this parameter mustsatisfy the following relationship: MinForUlBasicMeasx UlbAvgFilterLen x 60 < IntraFreqUlbPeriodTimer-LenGUI Value Range: 1~6000Unit: 10msActual Value Range: 10~60000Default Value: 100

TenMsecForUlBasicMeas

BSC6900

SETULDM

WRFD-020102

Loa

CE Overbooking (RAN15.0 05)

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