LTE Important Parameters and Switches

PDSCHPAADJSWITCHMOCellDlPcPdschPa

Parameter IDPdschPaAdjSwitch

Parameter NamePDSCHPAADJSWITCH

NEeNodeB

MML CommandLST CELLDLPCPDSCHPAMOD CELLDLPCPDSCHPA

MeaningIndicates the switch for adjusting the PA through power control on the PDSCH. If this parameter is set to ON, the PA is adjusted dynamically when the channel quality is extremely good or bad.

IsKeyNO

MandatoryNO

Dynamic AttributeNo

Feature IDLBFD-002016

Feature NameDynamic Downlink Power Allocation

Value TypeEnumeration values

GUI Value RangeOFF(Off), ON(On)

Enumeration Number/BitOFF~0, ON~1

UnitNone

Actual Value RangeOFF, ON

Default ValueOFF(Off)

Recommended ValueOFF(Off)

ImpactCellDlPcPdschPa

Parameter RelationshipNone

AccessRead & Write

Service Interrupted After ModificationNo (And no impact on the UE in idle mode)

Interruption ScopeNot involved

Interruption Duration (min)Not involved

CautionNone

Validation of ModificationThe parameter modification has no impact on the equipment.

Impact on Radio Network PerformanceIf this switch is on, the PA is adjusted. If this switch is off, the PA is not adjusted.

Introduced in Version...V100R002C00

AttributeRadio

Initial Value Setting SourceDefault/Recommended

Parent topic: CellDlPcPdschPa

MimoAdaptiveSwitchMOMimoAdaptiveParaCfg

Parameter IDMimoAdaptiveSwitch

Parameter NameMimoAdaptiveSwitch

NEeNodeB

MML CommandLST MIMOADAPTIVEPARACFGMOD MIMOADAPTIVEPARACFG

MeaningIndicates the switches related to adaptive MIMO.ModeCOLoopSwitch: is used to control whether adaptive switching between the open-loop mode and the closed-loop mode is applied to downlink transmission of an eNodeB that is equipped with multiple antennas.ModeDivMuxSwitch: is used to control whether adaptive switching between the diversity mode and the multiplexing mode is applied to downlink transmission of an eNodeB that is equipped with multiple antennas.

IsKeyNO

MandatoryNO

Dynamic AttributeNo

Feature IDLBFD-002017LOFD-001003

Feature NameDL 2x2 MIMODL 4x2 MIMO

Value TypeBit field type

GUI Value RangeModeCOLoopSwitch(Open loop and Closed loop Switch), ModeDivMuxSwitch(Diversity and Multiplexing Switch)

Enumeration Number/BitModeCOLoopSwitch~0, ModeDivMuxSwitch~1

UnitNone

Actual Value RangeModeCOLoopSwitch, ModeDivMuxSwitch

Default ValueOpen loop and Closed loop Switch:off, Diversity and Multiplexing Switch:on

Recommended ValueOpen loop and Closed loop Switch:off, Diversity and Multiplexing Switch:on

ImpactMimoAdaptiveParaCfg


AccessRead & Write




CautionNone


Impact on Radio Network PerformanceThe setting of this parameter determines the transmission modes that are applicable to the UEs served by a multi-antenna eNodeB and hence affects the performance such as the throughput and coverage.


AttributeRadio

Initial Value Setting SourceEngineering Design

Parent topic: MimoAdaptiveParaCfg

DELTAMCSENABLEDMOCellUlPcDedic

Parameter IDDeltaMcsEnabled

Parameter NameDELTAMCSENABLED

NEeNodeB

MML CommandLST CELLULPCDEDICMOD CELLULPCDEDIC

MeaningIndicates whether the transmit power of the UE is adjustedaccording to the difference between MCSs. indication is containedin an RRC message signaled to the UE. In the message,this indication occupies one bit. The value 0, which means disabled,indicates that TF is equal to 0 because Ks is equal to 0. The value1, which means enabled, indicates that TF is calculated on the conditionthat Ks is equal to 1.25.

IsKeyNO

MandatoryNO

Dynamic AttributeNo


Feature NameUplink Power Control


GUI Value RangeUU_DISABLE(Disable), UU_ENABLE(Enable)

Enumeration Number/BitUU_DISABLE~0, UU_ENABLE~1

UnitNone

Actual Value RangeUU_DISABLE, UU_ENABLE

Default ValueUU_DISABLE(Disable)

Recommended ValueUU_DISABLE(Disable)

ImpactCellUlPcDedic


AccessRead & Write




CautionNone


Impact on Radio Network PerformanceWhen Ks is equal to 0, the transmit power can be adjustedaccording to only closed-loop TPC commands. When Ks is equal to 1.25,the transmit power can be adjusted by means of selecting differentMCSs during scheduling. This helps the UE to quickly adapt to changesin channel conditions and increases the cell throughput.


AttributeRadio


Parent topic: CellUlPcDedic

ROHCSwitchMOPDCPROHCPara

Parameter IDROHCSwitch

Parameter NameROHCSwitch

NEeNodeB

MML CommandLST PDCPROHCPARAMOD PDCPROHCPARA

MeaningIndicates whether the eNodeB supports ROHC.This switch needs to be set to ON when the eNodeB is expected to support VoIP or video services.

IsKeyNO

MandatoryNO

Dynamic AttributeNo

Feature IDLOFD-001017

Feature NameRObust Header Compression (ROHC)




UnitNone




ImpactPDCPROHCPara


AccessRead & Write




CautionNone


Impact on Radio Network PerformanceROHC header compression helps reduce header overhead. The reduction is especially significant for services with small data packets, such as VoIP services.


AttributeRadio


Parent topic: PDCPROHCPara

HighestModeMOPDCPROHCPara

Parameter IDHighestMode

Parameter NameHighestMode

NEeNodeB


MeaningIndicates the highest mode of ROHC operation.In Unidirectional Mode (U-mode), packets are sent in one direction only (that is, from the compressor to the decompressor), and a feedback channel from the decompressor to the compressor is undesirable. Therefore, the U-mode provides the lowest reliability but also the lowest feedback overhead, compared with the other two modes.In Bi-directional Optimistic Mode (O-mode), the decompressor sends the compressor the feedback, which indicates errors or context synchronization successes. Therefore, the O-mode provides higher reliability than the U-mode but causes a lower amount of feedback information than the R-mode. In Bi-Directional Reliable Mode (R-mode), the reliability of context synchronization between the compressor and the decompressor is higher than that in any other mode; however, because of frequent feedback, the R-mode causes the greatest link overhead.

IsKeyNO

MandatoryNO

Dynamic AttributeNo




GUI Value RangeU_MODE(Unidirectional Mode), O_MODE(Bi-directional Optimistic Mode), R_MODE(Bi-Directional Reliable Mode)

Enumeration Number/BitU_MODE~1, O_MODE~2, R_MODE~3

UnitNone

Actual Value RangeU_MODE, O_MODE, R_MODE

Default ValueU_MODE(Unidirectional Mode)

Recommended ValueU_MODE(Unidirectional Mode)

ImpactPDCPROHCPara


AccessRead & Write




CautionNone


Impact on Radio Network PerformanceThe reliability of packet transmission and the network link overhead are affected.


AttributeRadio



ProfilesMOPDCPROHCPara

Parameter IDProfiles

Parameter NameProfiles

NEeNodeB


MeaningIndicates the compression profile supported by the eNodeB.Under the ROHC framework, different header compression algorithms are applicable to different protocols. Profiles define the header compression protocols (such as RTP/UDP/IP or TCP/IP), which are under the same ROHC framework, for specific types of packet streams. Each profile has a unique identifier.As defined by LTE specifications, the eNodeB supports the following profiles: profile 0x0001 (usage: RTP/UDP/IP; reference: RFC 3095 and RFC 4815), profile 0x0002 (usage: UDP/IP; reference: RFC 3095 and RFC 4815), profile 0x0003 (usage: ESP/IP; reference: RFC 3095 and RFC 4815), and profile 0x0004 (usage: IP; reference: RFC 3843 and RFC 4815).

IsKeyNO

MandatoryNO

Dynamic AttributeNo



Value TypeBit field type

GUI Value RangeProfile0x0001(Profile0x0001), Profile0x0002(Profile0x0002), Profile0x0003(Profile0x0003), Profile0x0004(Profile0x0004)

Enumeration Number/BitProfile0x0001~0, Profile0x0002~1, Profile0x0003~2, Profile0x0004~3

UnitNone

Actual Value RangeProfile0x0001, Profile0x0002, Profile0x0003, Profile0x0004

Default ValueProfile0x0001:on, Profile0x0002:on, Profile0x0003:on, Profile0x0004:on

Recommended ValueProfile0x0001:on, Profile0x0002:on, Profile0x0003:on, Profile0x0004:on

ImpactPDCPROHCPara


AccessRead & Write




CautionNone


Impact on Radio Network PerformanceThe support for different protocols is affected.


AttributeRadio



DefDopplerLevelMOINNERMEASSWITCH

Parameter IDDefDopplerLevel

Parameter NameDefDopplerLevel

NEeNodeB

MML CommandMOD INNERMEASSWITCHLST INNERMEASSWITCH

MeaningIndicates the default Doppler level. When the Doppler measurement switch is shut down, parameters are set based on the default Doppler level.

IsKeyNO

MandatoryNO

Dynamic AttributeNo


Feature NameDynamic Scheduling


GUI Value RangeCLASS_0(CLASS_0), CLASS_1(CLASS_1), CLASS_2(CLASS_2)

Enumeration Number/BitCLASS_0~0, CLASS_1~1, CLASS_2~2

UnitNone

Actual Value RangeCLASS_0, CLASS_1, CLASS_2

Default ValueCLASS_1(CLASS_1)

Recommended ValueCLASS_1(CLASS_1)

ImpactINNERMEASSWITCH


AccessRead & Write




CautionNone


Impact on Radio Network PerformanceIndicates the default Doppler level when the Doppler measurement switch is shut down. The Doppler level and other associated factors affect the CQI report mode and reported parameters, and therefore affect the feedback overhead on the uplink and throughput or coverage on the downlink.


AttributeRadio


Parent topic: INNERMEASSWITCH

TtiBundlingSwitchMOGlobalProcSwitch

Parameter IDTtiBundlingSwitch

Parameter NameTtiBundlingSwitch

NEeNodeB

MML CommandLST GLOBALPROCSWITCHMOD GLOBALPROCSWITCH

MeaningIndicates whether TTI bundling is enabled.

IsKeyNO

MandatoryNO

Dynamic AttributeNo


Feature NameEnhanced Scheduling




UnitNone




ImpactGlobalProcSwitch


AccessRead & Write




CautionNone


Impact on Radio Network PerformanceIf TTI bundling is enabled for the UE, you can configure TTI bundling through the UE to obtain more transmission chances within the delay budget on the VOIP air interface, improving uplink coverage.


AttributeRadio


Parent topic: GlobalProcSwitch

PdcchBndPcSwMOCellDlpcPdcch

Parameter IDPdcchBndPcSw

Parameter NamePdcchBndPcSw

NEeNodeB

MML CommandMOD CELLDLPCPDCCH

MeaningIndicates the switch that is used to enable and disable power control applied to the PDCCH carrying dedicated control information. If this parameter is set to ON, the PDCCH power is adjusted dynamically when the channel quality is extremely good or bad.

IsKeyNO

MandatoryNO

Dynamic AttributeNo


Feature NameDynamic Downlink Power Allocation


GUI Value RangeOFF, ON


UnitNone


Default ValueOFF

Recommended ValueOFF

ImpactCellDlpcPdcch


AccessRead & Write




CautionNone


Impact on Radio Network PerformanceNone


AttributeRadio


Parent topic: CellDlpcPdcch

Reference signal powerMOPDSCHCfg

Parameter IDReferenceSignalPwr

Parameter NameReference signal power

NEeNodeB

MML CommandMOD PDSCHCFG

MeaningIndicates the reference signal power of the cell. For details, see 3GPP TS 36.213.

IsKeyNO

MandatoryNO

Dynamic AttributeNo

Feature IDLBFD-002003LBFD-002009LBFD-002016

Feature NamePhysical Channel ManagementBroadcast of system informationDynamic Downlink Power Allocation

Value TypeInterval values

GUI Value Range-600~500

Enumeration Number/BitNot involved

Unit0.1dBm

Actual Value Range-600~500

Default Value182

Recommended ValueNo recommended value. This parameter must be set based on the power specification of the RRU and the cell bandwidth.

ImpactPDSCHCfg


AccessRead & Write




CautionNone


Impact on Radio Network Performance1) Coverage: If the value of ReferenceSignalPwr is too large, cross-coverage occurs. This causes interference to other cells. If the value of ReferenceSignalPwr is too small, coverage holes appear.2) Interference: The setting of ReferenceSignalPwr varies depending on the interference from neighboring cells. A large interference margin is required where the interference is strong.3) Channel estimation: A larger value of ReferenceSignalPwr leads to higher channel estimation accuracy, a lower demodulation threshold, and higher receiver sensitivity, but it causes stronger interference to neighboring cells.4) Capacity: A larger value of ReferenceSignalPwr brings better coverage, but a large value limits the power used for data transmission and hence decreases the system capacity.Set ReferenceSignalPwr appropriately to ensure a reasonable tradeoff between coverage and capacity, effective channel estimation, and appropriate interference control.


AttributeRadio


Parent topic: PDSCHCfg

Qam64 enabledMOPUSCHCfg

Parameter IDQam64Enabled

Parameter NameQam64 enabled

NEeNodeB

MML CommandMOD PUSCHCFG

MeaningIndicates whether 64QAM of the PUSCH is enabled.For details, see 3GPP TS 36.211.

IsKeyNO

MandatoryNO

Dynamic AttributeNo


Feature NameUL 64QAM


GUI Value RangeBOOLEAN_FALSE(False), BOOLEAN_TRUE(True)

Enumeration Number/BitBOOLEAN_FALSE~0, BOOLEAN_TRUE~1

UnitNone

Actual Value RangeBOOLEAN_FALSE, BOOLEAN_TRUE

Default ValueBOOLEAN_TRUE(True)

Recommended ValueNo recommended value. The value should be set based on the 64QAM capability of the UE.

ImpactPUSCHCfg


AccessRead & Write




CautionNone




AttributeRadio


Parent topic: PUSCHCfg

UeTimerConstThis chapter describes the parameters related to the UeTimerConst MO. Local cell identity Constant N310 Constant N311 Timer 300 Timer 301 Timer 310 Timer 311Parent topic: Radio-tree

Intra-Frequency Mobility Load Balancing ThresholdMOCellMLB

Parameter IDIntraFreqMlbThd

Parameter NameIntra-Frequency Mobility Load Balancing Threshold

NEeNodeB

MML CommandMOD CELLMLB

MeaningIndicates the threshold that is used to trigger the intra-frequency load balancing algorithm. When the cell load is equal to or lower than this threshold, the intra-frequency load balancing algorithm is triggered or stopped. This parameter is used with the load offset. That is, when the load is higher than the load threshold plus the load offset, the algorithm is triggered; when the load is lower than the load threshold, the algorithm is stopped.

IsKeyNO

MandatoryNO

Dynamic AttributeNo

Feature IDLBFD-001001LOFD-001032

Feature Name3GPP R8 SpecificationsIntra-LTE Load Balancing


GUI Value Range1~100


Unit%

Actual Value Range0.01~1

Default Value60

Recommended Value60

ImpactCellMLB

Parameter RelationshipThe difference between the intra-frequency load balancing threshold and the load offset should be greater than the DL cell dual-band intelligent shutdown threshold. The sum of the intra-frequency load balancing threshold and the load offset should be less than the DL admission load threshold. The sum of the load balancing threshold and the load offset cannot be greater than 100.

AccessRead & Write




CautionNone


Impact on Radio Network PerformanceThis parameter value has an obvious impact on the use of the MLB algorithm. A greater parameter value may cause the MLB algorithm fail to take full effect when the cell is overload. A smaller parameter value may cause too much signaling interaction and too many handovers.


AttributeRadio


Parent topic: CellMLB

SMeasureMOHoMeasComm

Parameter IDSMeasure

Parameter NameSMeasure

NEeNodeB

MML CommandMOD HOMEASCOMM

MeaningIndicates the measurement threshold. When the quality of the serving cell is higher than the threshold, the UE does not need to measure the intra-frequency, inter-frequency, and inter-RAT neighboring cells. Thus, the power consumption is reduced.

IsKeyNO

MandatoryNO

Dynamic AttributeNo

Feature IDLBFD-00201801LBFD-00201802LOFD-001019LOFD-001020LOFD-001021LOFD-001022LOFD-001022

Feature NameCoverage Based Intra-frequency HandoverCoverage Based Inter-frequency HandoverPS Inter-RAT Mobility between E-UTRAN and UTRANPS Inter-RAT Mobility between E-UTRAN and GERANPS Inter-RAT Mobility between E-UTRAN and CDMA2000SRVCC to UTRANSRVCC to UMTS


GUI Value Range-141~-44


UnitdBm

Actual Value Range-141~-44

Default Value-44

Recommended Value-44

ImpactHoMeasComm


AccessRead & Write




CautionNone




AttributeRadio


Parent topic: HoMeasComm

Root sequence indexMOCell

Parameter IDRootSequenceIdx

Parameter NameRoot sequence index

NEeNodeB

MML CommandADD CELLMOD CELL

MeaningIndicates the logical root sequence index, which is used to derive the preamble sequence. Each logical root sequence corresponds to a physical root sequence. For the mapping between logical root sequences and physical root sequences, see 3GPP TS 36.211.

IsKeyNO

MandatoryYES

Dynamic AttributeNo


Feature NameRandom Access Procedure


GUI Value Range0~837


UnitNone

Actual Value Range0~837

Default ValueNone

Recommended ValueNone

ImpactCell

Parameter RelationshipWhen the preamble format is 0, 1, 2, or 3 and HighSpeedFlag is HIGH_SPEED or SUPER_HIGH_SPEED, the relations between cell radius and root sequence index are as follows:1) If 1 m

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LTE Important Parameters and Switches