Adaptive RACH(RAN16.0_01)

WCDMA RAN

Adaptive RACH Feature ParameterDescription

Issue 01

Date 2014-04-30

HUAWEI TECHNOLOGIES CO., LTD.

Copyright © Huawei Technologies Co., Ltd. 2015. 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.

The information in this document is subject to change without notice. Every effort has been made in thepreparation of this document to ensure accuracy of the contents, but all statements, information, andrecommendations in this document do not constitute a warranty of any kind, express or implied.

Huawei Technologies Co., Ltd.Address: Huawei Industrial Base

Bantian, LonggangShenzhen 518129People's Republic of China

Website: http://www.huawei.com

Email: [email protected]

Issue 01 (2014-04-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.

i

http://www.huawei.com

mailto:[email protected]

Contents

1 Introduction....................................................................................................................................11.1 Scope..............................................................................................................................................................................11.2 Intended Audience..........................................................................................................................................................11.3 Change History...............................................................................................................................................................1

2 Overview.........................................................................................................................................32.1 Introduction....................................................................................................................................................................32.2 Benefits...........................................................................................................................................................................3

3 Technical Description...................................................................................................................4

4 Related Features.............................................................................................................................6

5 Network Impact.............................................................................................................................7

6 Engineering Guidelines...............................................................................................................86.1 When to Use Adaptive RACH........................................................................................................................................86.2 Required Information.....................................................................................................................................................86.3 Feature Deployment.......................................................................................................................................................86.3.1 Requirements...............................................................................................................................................................96.3.2 Data Preparation........................................................................................................................................................106.3.3 Activation..................................................................................................................................................................166.3.4 Activation Observation..............................................................................................................................................196.3.5 Deactivation...............................................................................................................................................................196.4 Performance Monitoring...............................................................................................................................................206.5 Parameter Optimization................................................................................................................................................216.6 Troubleshooting............................................................................................................................................................21

7 Parameters.....................................................................................................................................22

8 Counters........................................................................................................................................48

9 Glossary.........................................................................................................................................50

10 Reference Documents...............................................................................................................51

WCDMA RANAdaptive RACH Feature Parameter Description Contents


ii

1 Introduction

1.1 ScopeThis document describes WRFD-151201 Adaptive RACH feature, including its technicalprinciples, related features, network impact, and engineering guidelines.

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:

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

RAN16.0 01(2014-04-30)This issue includes the following changes.

WCDMA RANAdaptive RACH Feature Parameter Description 1 Introduction


1

ChangeType

Change Description Parameter Change

Featurechange

None None

Editorialchange

Added the method for checking the HSUPAthroughput. For details, see section 6.4Performance Monitoring.

None

RAN16.0 Draft A (2014-01-20)This document is created for RAN16.0.

WCDMA RANAdaptive RACH Feature Parameter Description 1 Introduction


2

2 Overview

2.1 IntroductionWhen a large number of UEs simultaneously initiate a random access procedure in a cell, thereceived total wideband power (RTWP) of this cell becomes extremely high. To reduce theRTWP in this scenario, Huawei offers Adaptive RACH. Adaptive RACH enables the RNC todynamically adjust the settings of random access parameters for a cell based on the uplink powerload and number of acknowledged random accesses in a specified period of time. This featurecan reduce a cell's RTWP and increase its capacity.

2.2 BenefitsWhen the RTWP of a cell is high due to a large number of random accesses, Adaptive RACHhelps reduce the RTWP by 0.3 dB to 0.5 dB or improve the HSUPA throughput by about 5%.

WCDMA RANAdaptive RACH Feature Parameter Description 2 Overview


3

3 Technical Description

When the RTWP of a cell is high due to a large number of random accesses, Adaptive RACHenables the RNC to dynamically adjust the settings of random access parameters based on theuplink power load and number of acknowledged random accesses. The RNC broadcasts the newsettings of random access parameters to UEs. The random access parameters include the constantfor calculating the initial transmit power, ramping step for random access preambles, andmaximum number of preamble retransmissions.

The RNC measures the number of acknowledged random accesses in a cell when theACK_PRACH_PREAM_MEAS check box under the NBMLdcAlgoSwitch(BSC6900,BSC6910) parameter in the ADD UCELLALGOSWITCH command is selected.

Adaptive RACH is activated when the ADAPTIVE_RACH andACK_PRACH_PREAM_MEAS check boxes under the NBMLdcAlgoSwitch(BSC6900,BSC6910) parameter in the ADD UCELLALGOSWITCH command are selected.

The RNC dynamically adjusts the settings of the random access parameters as follows:

l When the cell uplink load is greater than or equal to the value of the OptiStartLoadStateparameter and the number of acknowledged random accesses in a cell is greater than orequal to the value of the RandomAccessCongestThd(BSC6900,BSC6910) parameter, theRNC broadcasts the optimized settings of random access parameters (OptiConstantvalue(BSC6900,BSC6910), OptiPowerRampStep(BSC6900,BSC6910), andOptiPreambleRetransMax(BSC6900,BSC6910)) to UEs.

l When the number of acknowledged random accesses is less than or equal to the value ofthe RandomAccessClearThd(BSC6900,BSC6910) parameter, the RNC broadcasts theoriginal settings of random access parameters (Constantvalue(BSC6900,BSC6910),PowerRampStep(BSC6900,BSC6910), and PreambleRetransMax(BSC6900,BSC6910))to UEs.

Compared with the original settings, the optimized settings reduce the value of the constant forcalculating the initial transmit power, lower the ramping step for random access preambles, andincrease the maximum number of preamble retransmissions. Therefore, using the optimizedsettings reduces the interference to uplink channels and ultimately reduces the cell RTWP whenthe cell uplink load is greater than the value of the OptiStartLoadState parameter and the numberof acknowledged random accesses is greater than the value of the RandomAccessCongestThd(BSC6900,BSC6910) parameter. When the number of acknowledged random accesses is lessthan or equal to the value of the RandomAccessClearThd(BSC6900,BSC6910) parameter, usingthe optimized setting increases the delay during random access.

WCDMA RANAdaptive RACH Feature Parameter Description 3 Technical Description


4

For details about the impact of the constant for calculating the initial transmit power, rampingstep for random access preambles, and maximum number of preamble retransmissions on therandom access procedure, see Power Control Feature Parameter Description.

For details about how to determine whether a cell is congested, see Load Control FeatureParameter Description.

WCDMA RANAdaptive RACH Feature Parameter Description 3 Technical Description


5

4 Related Features

Prerequisite FeaturesNone

Mutually Exclusive FeaturesNone

Impacted FeaturesNone

WCDMA RANAdaptive RACH Feature Parameter Description 4 Related Features


6

5 Network Impact

System CapacityWhen the RTWP of a cell is high due to a large number of random accesses, Adaptive RACHhelps reduce the RTWP by 0.3 dB to 0.5 dB or improve the HSUPA throughput by about 5%.

However, Adaptive RACH also increases delay during random access.

Network PerformanceNone

WCDMA RANAdaptive RACH Feature Parameter Description 5 Network Impact


7

6 Engineering Guidelines

6.1 When to Use Adaptive RACHThis feature is recommended for a cell in which with high RTWP due to a large number ofrandom accesses cause high RTWP.

This feature takes effect after activation if the cell meets the following conditions:

l The uplink power load is greater than the value of the OptiStartLoadState parameter. Thisparameter is set to 50% by default.

l The average number of acknowledged random accesses (indicated by theVS.Random.Access.ACKNum.Mean(BSC6900,BSC6910) counter) is greater than thevalue of the RandomAccessCongestThd parameter. This parameter is set to 50 by default.

6.2 Required InformationThe information to be collected for activation is as follows:

l VS.MeanRTWP(BSC6900,BSC6910): average RTWP of a cell. This counter is used tocalculate the uplink power load of a cell.

The uplink power load of a cell can be calculated using the following formula: uplink powerload = 1 - (1/RoT). In this formula, the rise over thermal (RoT) equals to the differencebetween the RTWP and the background noise. In addition, the RoT needs to be convertedinto linear quantities.

l VS.Random.Access.ACKNum.Mean(BSC6900,BSC6910): average number ofacknowledged random accesses in a cell.

The RNC measures the number of acknowledged random accesses in a cell when theACK_PRACH_PREAM_MEAS check box under the NBMLdcAlgoSwitch parameterin the ADD UCELLALGOSWITCH command is selected.

6.3 Feature Deployment

WCDMA RANAdaptive RACH Feature Parameter Description 6 Engineering Guidelines


8

6.3.1 Requirementsl Operating environment and hardware

The NodeB software version must be RAN16.0 or later.

For 3900 series base stations configured with a WBBPa board, cells carried on this WBBPaboard do not support this feature.

l Other NEsNone

l LicenseFor details about how to activate the license, see License Management Feature ParameterDescription.

Table 6-1 BSC6900&BSC6910

Feature ID FeatureName

LicenseControlItem ID

LicenseItem in theDSPLICUSAGECommandOutput

SupportedNE Type

LicenseAllocationforMultipleOperators

WRFD-151201

AdaptiveRACH

LQW1ARRES

AdaptiveRACH(perCell)

BSC6900BSC6910

Licensecontrolitems thatcannot beconfiguredbased onoperators

For details about how to activate the license, see License Management Feature ParameterDescription.

Table 6-2 BSC6900&BSC6910

Feature ID FeatureName

LicenseControlItem ID

LicenseItem in theDSPLICUSAGECommandOutput

SupportedNE Type

LicenseAllocationforMultipleOperators

WRFD-151201

AdaptiveRACH

LQW1ARRES

AdaptiveRACH(perCell)

BSC6900BSC6910

Licensecontrolitems thatcannot beconfiguredbased onoperators



9

6.3.2 Data PreparationThe following table lists the data to be configured before feature activation.

Parameter Name Parameter ID Setting Notes Data Source

Optimized Constantfor Initial TransmitPW Cal

OptiConstantvalue(BSC6900,BSC6910)

This parameter takeseffect only after theAdaptive RACHfeature triggers anadjustment ofrandom accessparameters. If thisparameter is set to alarge value, thepower used totransmit the firstPRACH preamble ishigh. In this case, theaccess delay is shortbut the uplinkcapacity of the targetcell decreases. If thisparameter is set to asmall value, thepower used totransmit the firstPRACH preamble islow. In this case, theaccess delay is longbut the uplinkcapacity of the targetcell is not greatlyaffected.

BSC internalplanning



10


Optimized MaxRandom AccessPreamble Retrans

OptiPreambleRe-transMax(BSC6900,BSC6910)

This parameter takeseffect only after theAdaptive RACHfeature triggers anadjustment ofrandom accessparameters. If thisparameter is set to alarge value, someUEs will increasetheir transmit powerand repeatedlyattempt to access thetarget cell. In thiscase, the interferencefrom these UEs onother UEs increases.If this parameter isset to a small value,the UE cannotincrease to the targetvalue the power usedto transmitpreambles and maytherefore fail toaccess the target cell.




11


Optimized PowerIncrease Step

OptiPowerRamp-Step(BSC6900,BSC6910)

This parameter takeseffect only after theAdaptive RACHfeature triggers anadjustment ofrandom accessparameters. If thisparameter is set to alarge value, theaccess process takesa short time but thepower consumptionin this process ishigh. When a largenumber of UEssimultaneouslyaccess a cell, theuplink load of the cellmay become heavy.If this parameter isset to a small value,the access processtakes a long time butthe powerconsumption in thisprocess is low. Whena large number ofUEs simultaneouslyaccess a cell, theuplink load of the cellmay not becomeheavy.




12


Random AccessResourceCongestion TriggerThre

RandomAccessCon-gestThd(BSC6900,BSC6910)

The larger the valueof this parameter, thelarger the number ofacknowledgedPRACH preamblesrequired for startingthe Adaptive RACHfeature and theshorter the timerequired for theoptimized settings ofrandom accessparameters to takeeffect. The smallerthe value of thisparameter, thesmaller the numberof acknowledgedPRACH preamblesrequired for startingthe Adaptive RACHfeature and thelonger the timerequired for theoptimized settings ofrandom accessparameters to takeeffect.




13


Random AccessResourceCongestion ClearThre

RandomAcces-sClearThd(BSC6900,BSC6910)

The larger the valueof this parameter, thelarger the number ofacknowledgedPRACH preamblesrequired for stoppingthe Adaptive RACHfeature and theshorter the timerequired for theoptimized settings ofrandom accessparameters to takeeffect. The smallerthe value of thisparameter, thesmaller the numberof acknowledgedPRACH preamblesrequired for stoppingthe Adaptive RACHfeature and thelonger the timerequired for theoptimized settings ofrandom accessparameters to takeeffect.




14


Optimized UplinkPower Load State

OptiStartLoadState(BSC6900,BSC6910)

The higher therequirements ofuplink power loadstates, the higher theuplink power load ofa cell required forstarting the AdaptiveRACH feature andthe shorter the timerequired for theoptimized settings ofrandom accessparameters to takeeffect. The lower therequirements ofuplink power loadstates, the lower theuplink power load ofa cell required forstarting the AdaptiveRACH feature andthe longer the timerequired for theoptimized settings ofrandom accessparameters to takeeffect.




15


Stop HysteresisDuration forAdaptive RACH

OptiStopHyst(BSC6900,BSC6910)

The larger the valueof this parameter, thelonger the timerequired to restorethe original settingsof random accessparameters after thedecongestionthreshold foracknowledgedrandom accesses isreached, the smallerthe number of timesthe Adaptive RACHfeature is triggered,and the smaller thenumber of systeminformation updatesin the cell. Thesmaller the value ofthis parameter, thelarger the number ofsystem informationupdates in the cell.


6.3.3 Activation

Activation (Using MML Commands)Perform the following steps to activate this feature:

Step 1 Run the RNC MML command ADD UCELLLICENSE and select theADAPTIVE_RACH_SWITCH check box under the FuncSwitch2 parameter.

Step 2 Run the RNC MML command MOD UCELLALGOSWITCH and select theACK_PRACH_PREAM_MEAS and ADAPTIVE_RACH check boxes under theNBMLdcAlgoSwitch parameter.

Step 3 Run the MML command ADD CELLADAPTRACH or MOD UCELLADAPTRACH andspecify the following parameters: Cell ID, Random Access Resource Congestion Trigger Thre,Random Access Resource Congestion Clear Thre, Optimized Uplink Power Load State, andStop Hysteresis Duration for Adaptive RACH.

----End

MML Command Examples//Activating the Adaptive RACH feature



16

ADD UCELLLICENSE: CellId=1, FuncSwitch2=ADAPTIVE_RACH_SWITCH-1;MOD UCELLALGOSWITCH: CellId=1, NBMLdcAlgoSwitch= ADAPTIVE_RACH-1&ACK_PRACH_PREAM_MEAS-1;ADD UCELLADAPTRACH: CellId=1, OptiConstantvalue=-30, OptiPreambleRetransMax=40, OptiPowerRampStep=1, RandomAccessCongestThd=50, RandomAccessClearThd=30, OptiStartLoadState=LoadedState, OptiStopHyst=30;

Activation (Using the CME)

Using the CME (Method 1)NOTE

When configuring the Adaptive RACH 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 batchmodification. Perform a batch modification before logging out of the parameter setting interface.

Step 1 Configure a single object (such as a cell) on the CME.

Set parameters on the CME according to the operation sequence in Table 6-3. 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)

To modify objects in batches, click on the CME to start the batch modification wizard. Forinstructions on how to perform a batch modification through the CME batch modification center,press F1 on the wizard interface to obtain online help.

----End

Table 6-3 Configuring the parameters on the CME

SN MO NE ParameterName

ParameterID

Configurable in CMEBatchModification Center

1 UCELLLICENSE

RNC FunctionSwitch2

FuncSwitch2(BSC6900,BSC6910):ADAPTIVE_RACH_SWITCH

Yes



17


ParameterID


2 UCELLALGOSWITCH

RNC Switch forCell LoadControl

NBMLdcAlgoSwitch(BSC6900,BSC6910):ADAPTIVE_RACHNBMLdcAlgoSwitch(BSC6900,BSC6910):ACK_PRACH_PREAM_MEAS

Yes

3 UCELLADAPTRACH

RNC RandomAccessResourceCongestionTrigger Thr

RandomAccessCongestThd(BSC6900,BSC6910)

Yes

RandomAccessResourceCongestionClear Thr

RandomAccessClearThd(BSC6900,BSC6910)

Yes

OptimizedUplinkPower LoadState

OptiStartLoadState(BSC6900,BSC6910)

Yes

StopHysteresisDuration forAdaptiveRACH

OptiStopHyst(BSC6900,BSC6910)

Yes

Using the CME (Method 2)This feature can be batch activated using the CME. For detailed operations, see the followingsection in the CME product documentation or online help: Managing the CME > CMEGuidelines > Enhanced Feature Management > Feature Operation and Maintenance.



18

6.3.4 Activation ObservationTo check whether this feature has been enabled, perform the following steps to query self-organizing network (SON) logs:

Step 1 On the U2000client, choose SON > SON Log.

Step 2 On the displayed SON Log tab page, click Query SON Log. Set Log Category to AdaptiveRACH log and Event Name to ALL. In addition, specify Event Source Object and TimePeriod as required.

Step 3 Click Synchronize in the bottom right corner of the SON Log tab page.

Step 4 Click Query and check whether there is a "Start Preamble Congestion Control" record in thespecified period of time. If there is, this feature has taken effect. If there is not, this feature hasnot taken effect.

----End

After this feature is activated, operating information about this feature will be recorded in SONlogs.

6.3.5 Deactivation

Deactivation (Using MML Commands)

Step 1 To deactivate this feature, deselect the ADAPTIVE_RACH andACK_PRACH_PREAM_MEAS check boxes under the Switch for Cell Load Controlparameter in the MOD UCELLALGOSWITCH command.

Step 2 Run the RNC MML command MOD UCELLLICENSE and deselect theADAPTIVE_RACH_SWITCH check box under the FuncSwitch2 parameter to deactivate thelicense controlling this feature.

----End

MML Command Examples//Deactivating the Adaptive RACH feature MOD UCELLALGOSWITCH: CellId=1, NBMLdcAlgoSwitch= ADAPTIVE_RACH-0&ACK_PRACH_PREAM_MEAS-0;//Deactivating the license controlling this featureMOD UCELLLICENSE: CellId=1, FuncSwitch2= ADAPTIVE_RACH_SWITCH-0;

Deactivation (Using the CME)NOTE

When configuring the Adaptive RACH 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 batchmodification. Perform a batch modification before logging out of the parameter setting interface.

Step 1 Configure a single object (such as a cell) on the CME.



19

Set parameters on the CME according to the operation sequence in Table 6-4. 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)

To modify objects in batches, click on the CME to start the batch modification wizard. Forinstructions on how to perform a batch modification through the CME batch modification center,press F1 on the wizard interface to obtain online help.

----End

Table 6-4 Configuring the parameter on the CME


ParameterID


1 UCELLALGOSWITCH

RNC Switch forCell LoadControl

NBMLdcAlgoSwitch(BSC6900,BSC6910):ADAPTIVE_RACHNBMLdcAlgoSwitch(BSC6900,BSC6910):ACK_PRACH_PREAM_MEAS

Yes

2 UCELLLICENSE

RNC FunctionSwitch2

FuncSwitch2(BSC6900,BSC6910):ADAPTIVE_RACH_SWITCH

Yes

6.4 Performance MonitoringTo evaluate the performance of this feature, check whether the RTWP of each cell decreases orthe HSUPA throughput of each cell increases after the feature is activated.

The RTWP and HSUPA throughput of a cell changes with the cell load. Therefore, the changesin RTWP and HSUPA throughput in a short period of time after this feature is activated do notreflect the performance of this feature. It is recommended that you check the RTWPs and HSUPAthroughput for 3 to 5 days before and after this feature is activated.



20

The RTWP of each cell can be checked in the following ways:

1. Counters VS.MaxRTWP(BSC6900,BSC6910) and VS.MeanRTWP(BSC6900,BSC6910) on the RNC side

2. Counters VS.HSUPA.LoadOutput.0 to VS.HSUPA.LoadOutput.25 on the NodeB side

The HSUPA throughput of each cell can be checked through the value of the RNC counterVS.HSUPA.MeanChThroughput.TotalBytes.

6.5 Parameter OptimizationSetting the RandomAccessCongestThd(BSC6900,BSC6910) and OptiStartLoadState(BSC6900,BSC6910) parameters to smaller values increases the probability that this featuretakes effect.

6.6 TroubleshootingFor 3900 series base stations configured with a WBBPa board, cells carried on this WBBPaboard do not support this feature. If such a cell is enabled with the Adaptive RACH feature, theRNC will send an error message (NBAP_ERR_IND_COMM) to the NodeB. In this case, disablethis feature for this cell.



21

7 Parameters

Table 7-1 Parameters

Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

NBMLdcAlgoSwitch

BSC6900

ADDUCELLALGOSWITCHMODUCELLALGOSWITCH

WRFD-151203WRFD-020106WRFD-171213WRFD-150231WRFD-150219WRFD-150216WRFD-150217WRFD-150215WRFD-01061003WRFD-020102WRFD-140223WRFD-150236

CampingStrategySwitchfor MassEvent

LoadReshuffling

SelfOptimizationUnderUplinkInterference

RIMBasedUMTSTargetCellSelection forLTE

Coverage BasedPSRedirection from

Meaning:Whether to enable the algorithms related to cell loadcontrol. Selecting a switch enables the correspondingalgorithm and clearing a switch disables thecorresponding algorithm.1. INTRA_FREQUENCY_LDB: Whether to enable thecell breathing algorithm. This algorithm adjusts P-CPICH transmit power of a cell based on the downlinkTCP load to achieve load balancing between intra-frequency cells. This algorithm automatically becomesinvalid when the load-based dynamic P-CPICHtransmit power adjustment algorithm (controlled by theDLLOAD_BASED_PCPICH_PWR_ADJ_SWITCHswitch) takes effect.2. PUC: Whether to enable the Potential User Control(PUC) algorithm. This algorithm adjusts cell selectionand reselection parameters based on the cell load toenable UEs to reselect lightly loaded cells.3. UL_UU_OLC: Whether to enable the uplinkoverload control (OLC) algorithm. When the uplinkpower is overloaded in a cell, this algorithm alleviatesthe uplink load by using quick transport format (TF)restriction, distributing best effort (BE) service tocommon channels, or releasing UEs.4. DL_UU_OLC: Whether to enable the downlink OLCalgorithm. When the downlink power is overloaded ina cell, this algorithm alleviates the downlink load byusing quick TF restriction, distributing BE services to

WCDMA RANAdaptive RACH Feature Parameter Description 7 Parameters


22

Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

WRFD-020101

WRFD-140226

WRFD-020107

WRFD-020104

WRFD-020105

WRFD-020126

WRFD-01061202

WRFD-020129

WRFD-010626

WRFD-010627

WRFD-020103

WRFD-010660

WRFD-010661

WRFD-010662

WRFD-010663

WRFD-010665

WRFD-140102

WRFD-01066004

WRFD-01061606

UMTSto LTELoadBasedPSRedirection fromUMTSto LTELoadBasedPSHandover fromUMTSto LTESRVCCfromLTE toUMTSwith PSHandoverHSDPAAdmissionControlLoadMeasurementMOCNCellResourceDemarcationLoadBasedDynamicAdjustment ofPCPICH

common channels, releasing UEs, or reconfiguring themaximum transmit power of FACHs.5. UL_UU_LDR: Whether to enable the uplink loadreshuffling (LDR) algorithm. When the uplink load isheavy in a cell, this algorithm alleviates the uplink loadby using load-based inter-frequency handovers, BEservice rate reduction, uncontrollable real-time serviceQoS renegotiation, load-based CS/PS inter-RAThandovers, and AMR service rate reduction.6. DL_UU_LDR: Whether to enable the downlink LDRalgorithm. When the downlink load is heavy in a cell,this algorithm alleviates the downlink load by usingload-based inter-frequency handovers, BE service ratereduction, uncontrollable real-time service QoSrenegotiation, load-based CS/PS inter-RAT handovers,AMR service rate reduction, and MBMS powerrestriction.7. OLC_EVENTMEAS: Whether to enable OLC eventmeasurement.8. CELL_CODE_LDR: Whether to enable cell codereshuffling algorithm. In the event of code resourceoveruse, this algorithm alleviates the code resourceoveruse by using BE service rate reduction, code treereshuffling, and load-based inter-frequency handovers.9. CELL_CREDIT_LDR: Whether to enable the cellcredit reshuffling algorithm. In the event of cell creditoveruse, this algorithm alleviates the credit overuse byusing load-based inter-frequency handovers, BE servicerate reduction, uncontrollable real-time service QoSrenegotiation, and load-based CS/PS inter-RAThandovers.10. UL_INTRA_FREQUENCY_ULB: Whether toenable RTWP-based intra-frequency load balancingalgorithm. This algorithm adjusts P-CPICH transmitpower of a cell based on the RTWP load to achieve loadbalancing between intra-frequency cells. This algorithmautomatically becomes invalid when the load-baseddynamic P-CPICH transmit power adjustmentalgorithm (controlled by theDLLOAD_BASED_PCPICH_PWR_ADJ_SWITCHswitch) takes effect.11. UL_UU_CLB: Whether to enable the uplink load-based CLB algorithm. This algorithm determineswhether a cell enters the CLB state by the uplink loadon the air interface. If a cell is in the CLB state,



23

Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

WRFD-01066002WRFD-01066003WRFD-01066001WRFD-01061605WRFD-020501WRFD-150220WRFD-01061601WRFD-01061603WRFD-01061602WRFD-140217WRFD-01061604WRFD-010616WRFD-01061608WRFD-140218

AdmissionControl

FastReturnfromUMTSto LTE

OverloadControl

IntraFrequency LoadBalance

PotentialUserControl

MobilityBetweenUMTSand LTEPhase 1

HSUPAAdmissionControl

PSServiceRedirection fromUMTSto LTE

MBMSFLC(FrequencyLayerConvergence)/FLD(FrequencyLayer

measurement-based inter-frequency handovers aretriggered periodically to achieve load balancingbetween inter-frequency cells.

12. DL_UU_CLB: Whether to enable the downlinkload-based CLB algorithm. This algorithm determineswhether a cell enters the CLB state by the downlink loadon the air interface. If a cell is in the CLB state,measurement-based inter-frequency handovers aretriggered periodically to achieve load balancingbetween inter-frequency cells.

13. CELL_CODE_CLB: Whether to enable coderesource-based CLB algorithm. This algorithmdetermines whether a cell enters the CLB state by thecode resource usage. If a cell is in the CLB state,measurement-based inter-frequency handovers aretriggered periodically to achieve load balancingbetween inter-frequency cells.

14. CELL_CREDIT_CLB: Whether to enable credit-based CLB algorithm. This algorithm determineswhether a cell enters the CLB state by the credit resourceusage. If a cell is in the CLB state, measurement-basedinter-frequency handovers are triggered periodically toachieve load balancing between inter-frequency cells.

15.DLLOAD_BASED_PCPICH_PWR_ADJ_SWITCH:Whether to enable downlink load-based dynamicprimary common pilot channel (P-CPICH) poweradjustment algorithm. This algorithm adjusts the P-CPICH transmit power by the downlink non-HSPApower load to reduce the downlink non-HSPA powerload. If this algorithm takes effect, other enabledalgorithms for intra-frequency load balancing (based onTCP or RTWP) automatically become invalid.

16. ADAPTIVE_RACH: Function switch for theadaptive RACH feature. When this switch is turned on,this feature is activated. In this case, the RNC adjuststhe random access parameters based on the randomaccess state and on the uplink power load of the targetcell. When this switch is turned off, this feature isdeactivated.

17. ACK_PRACH_PREAM_MEAS: Whether tomeasure the number of acknowledged PRACHpreambles. When this switch is turned on, the RNCmeasures the number of acknowledged PRACHpreambles. When this switch is turned off, the RNC does



24

Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

Dispersion)

FACHTransmissionSharingforMBMS

InterFrequency LoadBalance

MBMSPhase 2

MBMSover Iur

Dynamic PowerEstimation forMTCH

MSCHScheduling

MBMSChannelAudience RatingStatistics

CSFallbackGuarantee forLTEEmergencyCalls

Inter-FrequencyNeighboring CellSelectio

not measure the number of acknowledged PRACHpreambles.18. CAMPING_STRATEGY_SWITCH: Whether toenable the camping policy switching function whentraffic is heavy. This is a function switch for thefunction. When the switch is turned on, the campingpolicy switching function is enabled if traffic is heavyin the entire network. Then, the target cell is no longera preferred camping cell for the UE in question, but arandom camping cell.19. INTERFREQ_HHO_IN_RTWP_SWITCH:Whether the RNC considers the RTWP of the cellduring incoming coverage-based inter-frequencyhandovers to this cell. When this switch is turned on andthe Self Optimization Under Uplink Interference featuretakes effect, UEs can perform coverage-based inter-frequency handovers to the cell only when thedifference between the RTWP and RSCP (RTWP -RSCP) of this cell is less than the value of the"InterFreqInUlCovLimitThld" parameter in the "ADDUCELLINTERFREQHOCOV" command. When thisswitch is turned off, whether the RNC considers theuplink coverage (RTWP) of the cell during incomingcoverage-based inter-frequency handovers to this celldepends on the value of the "InterFreqHOConsi-derRTWPSw" parameter in the "ADDUCELLINTERFREQHOCOV" command configuredfor the neighboring cell.GUI Value Range: INTRA_FREQUENCY_LDB,PUC, UL_UU_LDR, DL_UU_LDR, UL_UU_OLC,DL_UU_OLC, OLC_EVENTMEAS,CELL_CODE_LDR, CELL_CREDIT_LDR,UL_INTRA_FREQUENCY_ULB, UL_UU_CLB,DL_UU_CLB, CELL_CODE_CLB,CELL_CREDIT_CLB,DLLOAD_BASED_PCPICH_PWR_ADJ_SWITCH,ADAPTIVE_RACH,ACK_PRACH_PREAM_MEAS,CAMPING_STRATEGY_SWITCH,INTERFREQ_HHO_IN_RTWP_SWITCHUnit: NoneActual Value Range: INTRA_FREQUENCY_LDB,PUC, UL_UU_LDR, DL_UU_LDR, UL_UU_OLC,DL_UU_OLC, OLC_EVENTMEAS,CELL_CODE_LDR, CELL_CREDIT_LDR,UL_INTRA_FREQUENCY_ULB, UL_UU_CLB,



25

Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

n forMBMSPTPUsersStreamingServiceonMBMSMBMSP2P overHSDPAMBMSAdmissionEnhancementMBMSEnhancedBroadcast ModeMBMSTransportResourceManagementOpenLoopPowerControlCoverage BasedPSHandover fromUMTSto LTEMBMSBroadcast Mode

DL_UU_CLB, CELL_CODE_CLB,CELL_CREDIT_CLB,DLLOAD_BASED_PCPICH_PWR_ADJ_SWITCH,ADAPTIVE_RACH,ACK_PRACH_PREAM_MEAS,CAMPING_STRATEGY_SWITCH,INTERFREQ_HHO_IN_RTWP_SWITCHDefault Value: INTRA_FREQUENCY_LDB:0,PUC:0,UL_UU_LDR:0,DL_UU_LDR:0,UL_UU_OLC:0,DL_UU_OLC:0,OLC_EVENTMEAS:0,CELL_CODE_LDR:0,CELL_CREDIT_LDR:0,UL_INTRA_FREQUENCY_ULB:0,UL_UU_CLB:0,DL_UU_CLB:0,CELL_CODE_CLB:0,CELL_CREDIT_CLB:0,DLLOAD_BASED_PCPICH_PWR_ADJ_SWITCH:0,ADAPTIVE_RACH:0,ACK_PRACH_PREAM_MEAS:0,CAMPING_STRATEGY_SWITCH:0,INTERFREQ_HHO_IN_RTWP_SWITCH:0



26

Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

MBMSLoadControlMBMSAdmissionControlInter-Frequency LoadBalancing BasedonConfigurableLoadThresholdMBMSSoft/SelectiveCombiningMBMSIntroductionPackage16/32/64/128KbpsChannelRate onMBMSService-BasedPSHandover fromUMTSto LTE



27

Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

NBMLdcAlgoSwitch

BSC6910

ADDUCELLALGOSWITCHMODUCELLALGOSWITCH

WRFD-151203

WRFD-020106

WRFD-171213

WRFD-150231

WRFD-150219

WRFD-150216

WRFD-150217

WRFD-150215

WRFD-01061003

WRFD-020102

WRFD-140223

WRFD-150236

WRFD-020101

WRFD-140226

WRFD-020107

WRFD-020104

WRFD-020105

WRFD-020126

WRFD-01061202

CampingStrategySwitchfor MassEvent

LoadReshuffling

SelfOptimizationUnderUplinkInterference

RIMBasedUMTSTargetCellSelection forLTE

Coverage BasedPSRedirection fromUMTSto LTE

LoadBasedPSRedirection fromUMTSto LTE

LoadBasedPSHandover fromUMTSto LTE

Meaning:Whether to enable the algorithms related to cell loadcontrol. Selecting a switch enables the correspondingalgorithm and clearing a switch disables thecorresponding algorithm.1. INTRA_FREQUENCY_LDB: Whether to enable thecell breathing algorithm. This algorithm adjusts P-CPICH transmit power of a cell based on the downlinkTCP load to achieve load balancing between intra-frequency cells. This algorithm automatically becomesinvalid when the load-based dynamic P-CPICHtransmit power adjustment algorithm (controlled by theDLLOAD_BASED_PCPICH_PWR_ADJ_SWITCHswitch) takes effect.2. PUC: Whether to enable the Potential User Control(PUC) algorithm. This algorithm adjusts cell selectionand reselection parameters based on the cell load toenable UEs to reselect lightly loaded cells.3. UL_UU_OLC: Whether to enable the uplinkoverload control (OLC) algorithm. When the uplinkpower is overloaded in a cell, this algorithm alleviatesthe uplink load by using quick transport format (TF)restriction, distributing best effort (BE) service tocommon channels, or releasing UEs.4. DL_UU_OLC: Whether to enable the downlink OLCalgorithm. When the downlink power is overloaded ina cell, this algorithm alleviates the downlink load byusing quick TF restriction, distributing BE services tocommon channels, releasing UEs, or reconfiguring themaximum transmit power of FACHs.5. UL_UU_LDR: Whether to enable the uplink loadreshuffling (LDR) algorithm. When the uplink load isheavy in a cell, this algorithm alleviates the uplink loadby using load-based inter-frequency handovers, BEservice rate reduction, uncontrollable real-time serviceQoS renegotiation, load-based CS/PS inter-RAThandovers, and AMR service rate reduction.6. DL_UU_LDR: Whether to enable the downlink LDRalgorithm. When the downlink load is heavy in a cell,this algorithm alleviates the downlink load by usingload-based inter-frequency handovers, BE service ratereduction, uncontrollable real-time service QoSrenegotiation, load-based CS/PS inter-RAT handovers,AMR service rate reduction, and MBMS powerrestriction.



28

Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

WRFD-020129

WRFD-010626

WRFD-010627

WRFD-020103

WRFD-010660

WRFD-010661

WRFD-010662

WRFD-010663

WRFD-010665

WRFD-140102

WRFD-01066004

WRFD-01061606

WRFD-01066002

WRFD-01066003

WRFD-01066001

WRFD-01061605

WRFD-020501

SRVCCfromLTE toUMTSwith PSHandoverHSDPAAdmissionControlLoadMeasurementMOCNCellResourceDemarcationLoadBasedDynamicAdjustment ofPCPICHAdmissionControlFastReturnfromUMTSto LTEOverloadControlIntraFrequency LoadBalancePotentialUserControl

7. OLC_EVENTMEAS: Whether to enable OLC eventmeasurement.

8. CELL_CODE_LDR: Whether to enable cell codereshuffling algorithm. In the event of code resourceoveruse, this algorithm alleviates the code resourceoveruse by using BE service rate reduction, code treereshuffling, and load-based inter-frequency handovers.

9. CELL_CREDIT_LDR: Whether to enable the cellcredit reshuffling algorithm. In the event of cell creditoveruse, this algorithm alleviates the credit overuse byusing load-based inter-frequency handovers, BE servicerate reduction, uncontrollable real-time service QoSrenegotiation, and load-based CS/PS inter-RAThandovers.

10. UL_INTRA_FREQUENCY_ULB: Whether toenable RTWP-based intra-frequency load balancingalgorithm. This algorithm adjusts P-CPICH transmitpower of a cell based on the RTWP load to achieve loadbalancing between intra-frequency cells. This algorithmautomatically becomes invalid when the load-baseddynamic P-CPICH transmit power adjustmentalgorithm (controlled by theDLLOAD_BASED_PCPICH_PWR_ADJ_SWITCHswitch) takes effect.

11. UL_UU_CLB: Whether to enable the uplink load-based CLB algorithm. This algorithm determineswhether a cell enters the CLB state by the uplink loadon the air interface. If a cell is in the CLB state,measurement-based inter-frequency handovers aretriggered periodically to achieve load balancingbetween inter-frequency cells.

12. DL_UU_CLB: Whether to enable the downlinkload-based CLB algorithm. This algorithm determineswhether a cell enters the CLB state by the downlink loadon the air interface. If a cell is in the CLB state,measurement-based inter-frequency handovers aretriggered periodically to achieve load balancingbetween inter-frequency cells.

13. CELL_CODE_CLB: Whether to enable coderesource-based CLB algorithm. This algorithmdetermines whether a cell enters the CLB state by thecode resource usage. If a cell is in the CLB state,measurement-based inter-frequency handovers aretriggered periodically to achieve load balancingbetween inter-frequency cells.



29

Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

WRFD-150220WRFD-01061601WRFD-01061603WRFD-01061602WRFD-140217WRFD-01061604WRFD-010616WRFD-01061608WRFD-140218

MobilityBetweenUMTSand LTEPhase 1HSUPAAdmissionControlPSServiceRedirection fromUMTSto LTEMBMSFLC(FrequencyLayerConvergence)/FLD(FrequencyLayerDispersion)FACHTransmissionSharingforMBMSInterFrequency LoadBalanceMBMSPhase 2MBMSover IurDynamic PowerEstimati

14. CELL_CREDIT_CLB: Whether to enable credit-based CLB algorithm. This algorithm determineswhether a cell enters the CLB state by the credit resourceusage. If a cell is in the CLB state, measurement-basedinter-frequency handovers are triggered periodically toachieve load balancing between inter-frequency cells.15.DLLOAD_BASED_PCPICH_PWR_ADJ_SWITCH:Whether to enable downlink load-based dynamicprimary common pilot channel (P-CPICH) poweradjustment algorithm. This algorithm adjusts the P-CPICH transmit power by the downlink non-HSPApower load to reduce the downlink non-HSPA powerload. If this algorithm takes effect, other enabledalgorithms for intra-frequency load balancing (based onTCP or RTWP) automatically become invalid.16. ADAPTIVE_RACH: Function switch for theadaptive RACH feature. When this switch is turned on,this feature is activated. In this case, the RNC adjuststhe random access parameters based on the randomaccess state and on the uplink power load of the targetcell. When this switch is turned off, this feature isdeactivated.17. ACK_PRACH_PREAM_MEAS: Whether tomeasure the number of acknowledged PRACHpreambles. When this switch is turned on, the RNCmeasures the number of acknowledged PRACHpreambles. When this switch is turned off, the RNC doesnot measure the number of acknowledged PRACHpreambles.18. CAMPING_STRATEGY_SWITCH: Whether toenable the camping policy switching function whentraffic is heavy. This is a function switch for thefunction. When the switch is turned on, the campingpolicy switching function is enabled if traffic is heavyin the entire network. Then, the target cell is no longera preferred camping cell for the UE in question, but arandom camping cell.19. INTERFREQ_HHO_IN_RTWP_SWITCH:Whether the RNC considers the RTWP of the cellduring incoming coverage-based inter-frequencyhandovers to this cell. When this switch is turned on andthe Self Optimization Under Uplink Interference featuretakes effect, UEs can perform coverage-based inter-frequency handovers to the cell only when thedifference between the RTWP and RSCP (RTWP -



30

Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

on forMTCHMSCHSchedulingMBMSChannelAudience RatingStatisticsCSFallbackGuarantee forLTEEmergencyCallsInter-FrequencyNeighboring CellSelection forMBMSPTPUsersStreamingServiceonMBMSMBMSP2P overHSDPAMBMSAdmissionEnhancementMBMSEnhanced

RSCP) of this cell is less than the value of the"InterFreqInUlCovLimitThld" parameter in the "ADDUCELLINTERFREQHOCOV" command. When thisswitch is turned off, whether the RNC considers theuplink coverage (RTWP) of the cell during incomingcoverage-based inter-frequency handovers to this celldepends on the value of the "InterFreqHOConsi-derRTWPSw" parameter in the "ADDUCELLINTERFREQHOCOV" command configuredfor the neighboring cell.GUI Value Range: INTRA_FREQUENCY_LDB,PUC, UL_UU_LDR, DL_UU_LDR, UL_UU_OLC,DL_UU_OLC, OLC_EVENTMEAS,CELL_CODE_LDR, CELL_CREDIT_LDR,UL_INTRA_FREQUENCY_ULB, UL_UU_CLB,DL_UU_CLB, CELL_CODE_CLB,CELL_CREDIT_CLB,DLLOAD_BASED_PCPICH_PWR_ADJ_SWITCH,ADAPTIVE_RACH,ACK_PRACH_PREAM_MEAS,CAMPING_STRATEGY_SWITCH,INTERFREQ_HHO_IN_RTWP_SWITCHUnit: NoneActual Value Range: INTRA_FREQUENCY_LDB,PUC, UL_UU_LDR, DL_UU_LDR, UL_UU_OLC,DL_UU_OLC, OLC_EVENTMEAS,CELL_CODE_LDR, CELL_CREDIT_LDR,UL_INTRA_FREQUENCY_ULB, UL_UU_CLB,DL_UU_CLB, CELL_CODE_CLB,CELL_CREDIT_CLB,DLLOAD_BASED_PCPICH_PWR_ADJ_SWITCH,ADAPTIVE_RACH,ACK_PRACH_PREAM_MEAS,CAMPING_STRATEGY_SWITCH,INTERFREQ_HHO_IN_RTWP_SWITCHDefault Value: INTRA_FREQUENCY_LDB:0,PUC:0,UL_UU_LDR:0,DL_UU_LDR:0,UL_UU_OLC:0,DL_UU_OLC:0,OLC_EVENTMEAS:0,CELL_CODE_LDR:0,CELL_CREDIT_LDR:0,UL_INTRA_FREQUENCY_ULB:0,UL_UU_CLB:0,DL_UU_CLB:0,CELL_CODE_CLB:0,CELL_CREDIT_CLB:0,DLLOAD_BASED_PCPICH_PWR_ADJ_SWITCH:0,ADAPTIVE_RACH:0,ACK_PRACH_PREAM_MEAS:



31

Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

Broadcast ModeMBMSTransportResourceManagementOpenLoopPowerControlCoverage BasedPSHandover fromUMTSto LTEMBMSBroadcast ModeMBMSLoadControlMBMSAdmissionControlInter-Frequency LoadBalancing BasedonConfigurableLoadThresholdMBMSSoft/Selective

0,CAMPING_STRATEGY_SWITCH:0,INTERFREQ_HHO_IN_RTWP_SWITCH:0



32

Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

CombiningMBMSIntroductionPackage16/32/64/128KbpsChannelRate onMBMSService-BasedPSHandover fromUMTSto LTE

RandomAccessCongestThd

BSC6900

ADDUCELLADAPTRACHMODUCELLADAPTRACH

WRFD-151201

Adaptive RACH

Meaning: Congestion threshold for acknowledgedrandom accesses. When the number of acknowledgedrandom accesses equals to or exceeds this parametervalue, the RNCconsiders that the random access state iscongestion.GUI Value Range: 0~255Unit: NoneActual Value Range: 0~255Default Value: 50

RandomAccessCongestThd

BSC6910


WRFD-151201

Adaptive RACH

Meaning: Congestion threshold for acknowledgedrandom accesses. When the number of acknowledgedrandom accesses equals to or exceeds this parametervalue, the RNCconsiders that the random access state iscongestion.GUI Value Range: 0~255Unit: NoneActual Value Range: 0~255Default Value: 50



33

Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

OptiConstantvalue

BSC6900


WRFD-151201

Adaptive RACH

Meaning: Constant in the calculation of initial UEtransmit power for the optimized random accessprocedure. This constant is used when the congestionthreshold for acknowledged random accesses is reachedand uplink load is heavy. For detailed information ofthis parameter, see 3GPP TS 25.331.GUI Value Range: -35~-10Unit: dBActual Value Range: -35~-10Default Value: -30

OptiConstantvalue

BSC6910


WRFD-151201

Adaptive RACH

Meaning: Constant in the calculation of initial UEtransmit power for the optimized random accessprocedure. This constant is used when the congestionthreshold for acknowledged random accesses is reachedand uplink load is heavy. For detailed information ofthis parameter, see 3GPP TS 25.331.GUI Value Range: -35~-10Unit: dBActual Value Range: -35~-10Default Value: -30

OptiPowerRampStep

BSC6900


WRFD-151201

Adaptive RACH

Meaning: Power increase step for the optimized randomaccess procedure. This parameter is used when thecongestion threshold for acknowledged randomaccesses is reached and uplink load is heavy. Fordetailed information of this parameter, see 3GPP TS25.211.GUI Value Range: 1~8Unit: dBActual Value Range: 1~8Default Value: 1

OptiPowerRampStep

BSC6910


WRFD-151201

Adaptive RACH

Meaning: Power increase step for the optimized randomaccess procedure. This parameter is used when thecongestion threshold for acknowledged randomaccesses is reached and uplink load is heavy. Fordetailed information of this parameter, see 3GPP TS25.211.GUI Value Range: 1~8Unit: dBActual Value Range: 1~8Default Value: 1



34

Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

OptiPreambleRetransMax

BSC6900


WRFD-151201

Adaptive RACH

Meaning: Maximum number of times the PRACHpreambles can be retransmitted for the optimizedrandom access procedure. This parameter is used whenthe congestion threshold for acknowledged randomaccesses is reached and uplink load is heavy. Fordetailed information of this parameter, see 3GPP TS25.211.GUI Value Range: 1~64Unit: NoneActual Value Range: 1~64Default Value: 40

OptiPreambleRetransMax

BSC6910


WRFD-151201

Adaptive RACH

Meaning: Maximum number of times the PRACHpreambles can be retransmitted for the optimizedrandom access procedure. This parameter is used whenthe congestion threshold for acknowledged randomaccesses is reached and uplink load is heavy. Fordetailed information of this parameter, see 3GPP TS25.211.GUI Value Range: 1~64Unit: NoneActual Value Range: 1~64Default Value: 40

RandomAccessClearThd

BSC6900


WRFD-151201

Adaptive RACH

Meaning: Decongestion threshold for acknowledgedrandom accesses. When the number of acknowledgedrandom accesses equals to or becomes smaller than thisparameter value, the RNC considers that the randomaccess state is decongestion.GUI Value Range: 0~255Unit: NoneActual Value Range: 0~255Default Value: 30

RandomAccessClearThd

BSC6910


WRFD-151201

Adaptive RACH

Meaning: Decongestion threshold for acknowledgedrandom accesses. When the number of acknowledgedrandom accesses equals to or becomes smaller than thisparameter value, the RNC considers that the randomaccess state is decongestion.GUI Value Range: 0~255Unit: NoneActual Value Range: 0~255Default Value: 30



35

Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

Constantvalue

BSC6900

ADDUPRACHBASICMODUPRACHMODUPRACHUUPARAS

WRFD-020501

OpenLoopPowerControl

Meaning:This parameter specifies a constant used at calculationof the initial transmit power of the first preamble, to beused in the random access procedure.The formula is as follows: Preamble_Initial_Power =Primary CPICH DL TX power - CPICH_RSCP + ULinterference + Constantvalue. Where,Preamble_Initial_Power is the preamble initial TXpower, Primary CPICH DL TX power is the downlinktransmit (TX) power of PCPICH, CPICH_RSCP is thereceive signaling code power of the PCPICH measuredby UEs, and UL interference is the uplink interference.For detailed information of this parameter, see 3GPP TS25.331.GUI Value Range: -35~-10Unit: dBActual Value Range: -35~-10Default Value: -20

Constantvalue

BSC6910


WRFD-020501


Meaning:This parameter specifies a constant used at calculationof the initial transmit power of the first preamble, to beused in the random access procedure.The formula is as follows: Preamble_Initial_Power =Primary CPICH DL TX power - CPICH_RSCP + ULinterference + Constantvalue. Where,Preamble_Initial_Power is the preamble initial TXpower, Primary CPICH DL TX power is the downlinktransmit (TX) power of PCPICH, CPICH_RSCP is thereceive signaling code power of the PCPICH measuredby UEs, and UL interference is the uplink interference.For detailed information of this parameter, see 3GPP TS25.331.GUI Value Range: -35~-10Unit: dBActual Value Range: -35~-10Default Value: -20



36

Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

PowerRampStep

BSC6900


WRFD-020501


Meaning: The power ramp step of the random accesspreambles transmitted before the UE receives theacquisition indicator in the random access process. Fordetailed information of this parameter, see 3GPP TS25.211.GUI Value Range: 1~8Unit: dBActual Value Range: 1~8Default Value: 2

PowerRampStep

BSC6910


WRFD-020501


Meaning: The power ramp step of the random accesspreambles transmitted before the UE receives theacquisition indicator in the random access process. Fordetailed information of this parameter, see 3GPP TS25.211.GUI Value Range: 1~8Unit: dBActual Value Range: 1~8Default Value: 2

PreambleRetransMax

BSC6900


WRFD-020501


Meaning: The maximum number of preamblestransmitted in a preamble ramping cycle. For detailedinformation of this parameter, see 3GPP TS 25.211.GUI Value Range: 1~64Unit: NoneActual Value Range: 1~64Default Value: 20



37

Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

PreambleRetransMax

BSC6910


WRFD-020501


Meaning: The maximum number of preamblestransmitted in a preamble ramping cycle. For detailedinformation of this parameter, see 3GPP TS 25.211.GUI Value Range: 1~64Unit: NoneActual Value Range: 1~64Default Value: 20



38

Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

FuncSwitch2

BSC6900

ADDUCELLLICENSEMODUCELLLICENSE

WRFD-171209WRFD-151202WRFD-151203WRFD-150236WRFD-151201WRFD-171213WRFD-150232WRFD-171108WRFD-150246

CoverageImprovement forHSUPA2 ms TTIUesFACHPoolCampingStrategySwitchfor MassEventLoadBasedDynamicAdjustment ofPCPICHAdaptive RACHSelfOptimizationUnderUplinkInterferenceMultibandDirectRetryBasedon UELocationAutomatic Intra-FrequencyNeighborRelation

Meaning:1. BASED_UE_LOC_DRD_SWITCH: Whether thefunction of UE location-based multi-frequency-bandDRD is available. When the conditions of path loss aremet, cell edge UEs in a high-frequency-band cellperform the DRD procedure towards a low-frequency-band cell, or cell center UEs in a low-frequency-bandcell perform the DRD procedure towards a high-frequency-band cell. The function of UE location-basedmulti-frequency-band DRD takes effect only when thisparameter is turned on and the "BasedUELocDRD-Switch" parameter in the "SET UDRD" or "ADDUCELLDRD" command is also turned on.2. LOAD_BASED_PCPICH_PWR_ADJ: Whether thelicense function switch for Load Based DynamicAdjustment of PCPICH is enabled.3. ADAPTIVE_RACH_SWITCH(License Switch forAdaptive RACH): Cell-level license switch for theadaptive RACH feature. When this switch is turned on,the adaptive RACH is activated. When this switch isturned off, this feature is deactivated.4. CAMPING_STRATEGY_SWITCH(Switch forCamp Policy Switching in Heavy Traffic): Whether toenable the camping policy switching function whentraffic is heavy. This is a license switch for the function.When the switch is turned on, the camping policyswitching function is enabled if traffic is heavy in theentire network. Then, the target cell is no longer apreferred camping cell for the UE in question, but arandom camping cell.5. FACH_POOL_SWITCH: Function switch for theFACH Pool feature. When this switch is turned on, theFACH Pool feature is activated and the P2F-triggeredredirection algorithm is also activated. Note that P2Findicates a CELL_PCH/URA_PCH-to-CELL_FACHstate transition.6.FACH_TRAFF_STEER_AND_LOAD_SHARE_SWITCH: Function switch for the Service Steering and LoadSharing in CELL_FACH State feature. When thisswitch is turned on, this feature is activated. This featureincorporates the P2F-triggered redirection algorithm forreal-time services, the P2F-triggered redirectionalgorithm for non-real-time services, and the algorithm



39

Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

OptimizationServiceSteeringandLoadSharinginCELL_FACHState

of P2F-triggered redirection in case of P2D failures forreal-time services.7. UL_INTERFERE_OPT_ADJ_SWITCH: Switchcontrolling the license for the WRFD-171213 SelfOptimization Under Uplink Interference feature. Whenthis switch is set to on, a cell can adaptively optimizealgorithms and parameters related to the SelfOptimization Under Uplink Interference feature basedon the strength of uplink interference.8. HSUPA_TTI_2MS_COVER_IMP: Switchcontrolling the license for the WRFD-171209 CoverageImprovement for HSUPA 2ms TTI UEs feature. Whenthis switch is set to on, the WRFD-171209 CoverageImprovement for HSUPA 2ms TTI UEs feature can beused. When this switch is set to off, the WRFD-171209Coverage Improvement for HSUPA 2ms TTI UEsfeature cannot be used.9. INTRA_FREQ_ANR_OPT_SWITCH: Switchcontrolling the license of the feature Automatic Intra-Frequency Neighbor Relation Optimization. When thisswitch is turned on, the feature Automatic Intra-Frequency Neighbor Relation Optimization isactivated. When this switch is turned off, the featureAutomatic Intra-Frequency Neighbor RelationOptimization is deactivated.GUI Value Range:BASED_UE_LOC_DRD_SWITCH,LOAD_BASED_PCPICH_PWR_ADJ,ADAPTIVE_RACH_SWITCH,CAMPING_STRATEGY_SWITCH,FACH_POOL_SWITCH,FACH_TRAFF_STEER_AND_LOAD_SHARE_SWITCH, UL_INTERFERE_OPT_ADJ_SWITCH,HSUPA_TTI_2MS_COVER_IMP,INTRA_FREQ_ANR_OPT_SWITCHUnit: NoneActual Value Range:BASED_UE_LOC_DRD_SWITCH,LOAD_BASED_PCPICH_PWR_ADJ,ADAPTIVE_RACH_SWITCH,CAMPING_STRATEGY_SWITCH,FACH_POOL_SWITCH,FACH_TRAFF_STEER_AND_LOAD_SHARE_SWITCH,



40

Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

UL_INTERFERE_OPT_ADJ_SWITCH,HSUPA_TTI_2MS_COVER_IMP,INTRA_FREQ_ANR_OPT_SWITCHDefault Value: BASED_UE_LOC_DRD_SWITCH:0,LOAD_BASED_PCPICH_PWR_ADJ:0,ADAPTIVE_RACH_SWITCH:0,CAMPING_STRATEGY_SWITCH:0,FACH_POOL_SWITCH:0,FACH_TRAFF_STEER_AND_LOAD_SHARE_SWITCH:0,UL_INTERFERE_OPT_ADJ_SWITCH:0,HSUPA_TTI_2MS_COVER_IMP:0,INTRA_FREQ_ANR_OPT_SWITCH:0



41

Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

FuncSwitch2

BSC6910

ADDUCELLLICENSEMODUCELLLICENSE

WRFD-171209WRFD-151202WRFD-151203WRFD-150236WRFD-151201WRFD-150232WRFD-171108WRFD-150246

CoverageImprovement forHSUPA2 ms TTIUesFACHPoolCampingStrategySwitchfor MassEventLoadBasedDynamicAdjustment ofPCPICHAdaptive RACHMultibandDirectRetryBasedon UELocationAutomatic Intra-FrequencyNeighborRelationOptimizationServiceSteeringandLoadSharing

Meaning:1. BASED_UE_LOC_DRD_SWITCH: Whether thefunction of UE location-based multi-frequency-bandDRD is available. When the conditions of path loss aremet, cell edge UEs in a high-frequency-band cellperform the DRD procedure towards a low-frequency-band cell, or cell center UEs in a low-frequency-bandcell perform the DRD procedure towards a high-frequency-band cell. The function of UE location-basedmulti-frequency-band DRD takes effect only when thisparameter is turned on and the "BasedUELocDRD-Switch" parameter in the "SET UDRD" or "ADDUCELLDRD" command is also turned on.2. LOAD_BASED_PCPICH_PWR_ADJ: Whether thelicense function switch for Load Based DynamicAdjustment of PCPICH is enabled.3. ADAPTIVE_RACH_SWITCH(License Switch forAdaptive RACH): Cell-level license switch for theadaptive RACH feature. When this switch is turned on,the adaptive RACH is activated. When this switch isturned off, this feature is deactivated.4. CAMPING_STRATEGY_SWITCH(Switch forCamp Policy Switching in Heavy Traffic): Whether toenable the camping policy switching function whentraffic is heavy. This is a license switch for the function.When the switch is turned on, the camping policyswitching function is enabled if traffic is heavy in theentire network. Then, the target cell is no longer apreferred camping cell for the UE in question, but arandom camping cell.5. FACH_POOL_SWITCH: Function switch for theFACH Pool feature. When this switch is turned on, theFACH Pool feature is activated and the P2F-triggeredredirection algorithm is also activated. Note that P2Findicates a CELL_PCH/URA_PCH-to-CELL_FACHstate transition.6.FACH_TRAFF_STEER_AND_LOAD_SHARE_SWITCH: Function switch for the Service Steering and LoadSharing in CELL_FACH State feature. When thisswitch is turned on, this feature is activated. This featureincorporates the P2F-triggered redirection algorithm forreal-time services, the P2F-triggered redirectionalgorithm for non-real-time services, and the algorithm



42

Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

inCELL_FACHState

of P2F-triggered redirection in case of P2D failures forreal-time services.7. UL_INTERFERE_OPT_ADJ_SWITCH: Switchcontrolling the license for the WRFD-171213 SelfOptimization Under Uplink Interference feature. Whenthis switch is set to on, a cell can adaptively optimizealgorithms and parameters related to the SelfOptimization Under Uplink Interference feature basedon the strength of uplink interference.8. HSUPA_TTI_2MS_COVER_IMP: Switchcontrolling the license for the WRFD-171209 CoverageImprovement for HSUPA 2ms TTI UEs feature. Whenthis switch is set to on, the WRFD-171209 CoverageImprovement for HSUPA 2ms TTI UEs feature can beused. When this switch is set to off, the WRFD-171209Coverage Improvement for HSUPA 2ms TTI UEsfeature cannot be used.9. INTRA_FREQ_ANR_OPT_SWITCH: Switchcontrolling the license of the feature Automatic Intra-Frequency Neighbor Relation Optimization. When thisswitch is turned on, the feature Automatic Intra-Frequency Neighbor Relation Optimization isactivated. When this switch is turned off, the featureAutomatic Intra-Frequency Neighbor RelationOptimization is deactivated.GUI Value Range:BASED_UE_LOC_DRD_SWITCH,LOAD_BASED_PCPICH_PWR_ADJ,ADAPTIVE_RACH_SWITCH,CAMPING_STRATEGY_SWITCH,FACH_POOL_SWITCH,FACH_TRAFF_STEER_AND_LOAD_SHARE_SWITCH, UL_INTERFERE_OPT_ADJ_SWITCH,HSUPA_TTI_2MS_COVER_IMP,INTRA_FREQ_ANR_OPT_SWITCHUnit: NoneActual Value Range:BASED_UE_LOC_DRD_SWITCH,LOAD_BASED_PCPICH_PWR_ADJ,ADAPTIVE_RACH_SWITCH,CAMPING_STRATEGY_SWITCH,FACH_POOL_SWITCH,FACH_TRAFF_STEER_AND_LOAD_SHARE_SWITCH,



43

Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

UL_INTERFERE_OPT_ADJ_SWITCH,HSUPA_TTI_2MS_COVER_IMP,INTRA_FREQ_ANR_OPT_SWITCHDefault Value: BASED_UE_LOC_DRD_SWITCH:0,LOAD_BASED_PCPICH_PWR_ADJ:0,ADAPTIVE_RACH_SWITCH:0,CAMPING_STRATEGY_SWITCH:0,FACH_POOL_SWITCH:0,FACH_TRAFF_STEER_AND_LOAD_SHARE_SWITCH:0,UL_INTERFERE_OPT_ADJ_SWITCH:0,HSUPA_TTI_2MS_COVER_IMP:0,INTRA_FREQ_ANR_OPT_SWITCH:0

APPreamMeasRptPeriod

BSC6900

SETULDM

WRFD-151201

Adaptive RACH

Meaning: Interval for reporting acknowledged PRACHpreamble measurement results. For details about thisparameter, see the description about acknowledgedPRACH preamble measurement in 3GPP TS 25.433.GUI Value Range: 1~60Unit: sActual Value Range: 1~60Default Value: 10


BSC6910

SETULDM

WRFD-151201

Adaptive RACH


APPreamAvgFilterLen

BSC6900

SETULDM

WRFD-151201

Adaptive RACH

Meaning: Length of the filter window for acknowledgedPRACH preamble measurement.GUI Value Range: 1~32Unit: NoneActual Value Range: 1~32Default Value: 5



44

Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

APPreamAvgFilterLen

BSC6910

SETULDM

WRFD-151201

Adaptive RACH



BSC6900

SETUSATLDM

WRFD-151201

Adaptive RACH



BSC6910

SETUSATLDM

WRFD-151201

Adaptive RACH


APPreamAvgFilterLen

BSC6900

SETUSATLDM

WRFD-151201

Adaptive RACH


APPreamAvgFilterLen

BSC6910

SETUSATLDM

WRFD-151201

Adaptive RACH




45

Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

OptiStartLoadState

BSC6900


WRFD-020102

LoadMeasurement

Meaning: Uplink power load states for the adaptiveRACH feature. The RNC uses the optimized random-access-related parameter settings when the uplinkpower load of a cell matches any of the following states:light, normal, loaded, heavy, and overload. The lightstate indicates that the uplink power load is in the rangebetween 0% and 30%. The normal state indicates thatthe uplink power load is in the range between 30% and50%. The loaded state indicates that the uplink powerload is in the range between 50% and 70%. The heavystate indicates that the uplink power load is in the rangebetween 70% and 95%. The overload state indicates thatthe uplink power load is in the range between 95% and100%.GUI Value Range: LightState, NormalState,LoadedState, HeavyState, OverloadStateUnit: NoneActual Value Range: LightState, NormalState,LoadedState, HeavyState, OverloadStateDefault Value: LoadedState

OptiStartLoadState

BSC6910


WRFD-020102

LoadMeasurement

Meaning: Uplink power load states for the adaptiveRACH feature. The RNC uses the optimized random-access-related parameter settings when the uplinkpower load of a cell matches any of the following states:light, normal, loaded, heavy, and overload. The lightstate indicates that the uplink power load is in the rangebetween 0% and 30%. The normal state indicates thatthe uplink power load is in the range between 30% and50%. The loaded state indicates that the uplink powerload is in the range between 50% and 70%. The heavystate indicates that the uplink power load is in the rangebetween 70% and 95%. The overload state indicates thatthe uplink power load is in the range between 95% and100%.GUI Value Range: LightState, NormalState,LoadedState, HeavyState, OverloadStateUnit: NoneActual Value Range: LightState, NormalState,LoadedState, HeavyState, OverloadStateDefault Value: LoadedState



46

Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

OptiStopHyst

BSC6900


WRFD-151201

Adaptive RACH

Meaning: Hysteresis duration for stopping the adaptiveRACH feature. This timer starts after the decongestionthreshold for acknowledged random accesses isreached. After this timer expires, the RNC uses theoriginal random-access-related parameter settings.GUI Value Range: 5~255Unit: minActual Value Range: 5~255Default Value: 30

OptiStopHyst

BSC6910


WRFD-151201

Adaptive RACH

Meaning: Hysteresis duration for stopping the adaptiveRACH feature. This timer starts after the decongestionthreshold for acknowledged random accesses isreached. After this timer expires, the RNC uses theoriginal random-access-related parameter settings.GUI Value Range: 5~255Unit: minActual Value Range: 5~255Default Value: 30



47

8 Counters

Table 8-1 Counters

Counter ID Counter Name CounterDescription

NE Feature ID Feature Name

50331850 VS.HSUPA.LoadOutput.0

Number of CellUl LoadBetween 0db to0.5db

NodeB Multi-mode:NoneGSM: NoneUMTS:WRFD-010612LTE: None

HSUPAIntroductionPackage

50331875 VS.HSUPA.LoadOutput.25

Number of CellUl Load above30db

NodeB Multi-mode:NoneGSM: NoneUMTS:WRFD-010612LTE: None

HSUPAIntroductionPackage

67199617 VS.MeanRTWP Mean Power ofTotallyReceivedBandwidth forCell

BSC6900 WRFD-020102 LoadMeasurement

67199617 VS.MeanRTWP Mean Power ofTotallyReceivedBandwidth forCell


67199680 VS.MaxRTWP MaximumPower of TotallyReceivedBandwidth forCell


WCDMA RANAdaptive RACH Feature Parameter Description 8 Counters


48

Counter ID Counter Name CounterDescription

NE Feature ID Feature Name

67199680 VS.MaxRTWP MaximumPower of TotallyReceivedBandwidth forCell


73443289 VS.Random.Access.ACKNum.Mean

AverageNumber ofAcknowledgedPRACHPreambles andGrantedCommon E-DCH ResourcesDuring RandomAccess in a Cell

BSC6900 WRFD-151201 Adaptive RACH

73443289 VS.Random.Access.ACKNum.Mean

AverageNumber ofAcknowledgedPRACHPreambles andGrantedCommon E-DCH ResourcesDuring RandomAccess in a Cell

BSC6910 WRFD-151201 Adaptive RACH

WCDMA RANAdaptive RACH Feature Parameter Description 8 Counters


49

9 Glossary

For the acronyms, abbreviations, terms, and definitions, see Glossary.

WCDMA RANAdaptive RACH Feature Parameter Description 9 Glossary


50

10 Reference Documents

The reference documents are as follows:

1. 3GPP TS 25.331 "Radio Resource Control (RRC)"2. 3GPP TS 25.433 "UTRAN Iub interface Node B Application Part (NBAP) signalling"

WCDMA RANAdaptive RACH Feature Parameter Description 10 Reference Documents


51