Set Egprs Parameters of 2g Cell(Set Gcellegprspara)

Set EGPRS Parameters of 2G Cell(SET GCELLEGPRSPARA)Function

Use this command to set parameters related to the Enhanced General Packet Radio Service (EGPRS) of a cell.

Note

1. This command can be used in built-in PCU mode only.2. The target cell must be a EGPRS cell.

Parameters

Parameter ID ParameterName

Parameter Description

IDTYPE Index Type Meaning: Subscribers can specify the cell according to the index or the name.GUI Value Range: BYNAME(By Name), BYID(By Index)Unit: NoneActual Value Range: BYNAME, BYIDMML Default Value: NoneRecommended Value: NoneParameter Relationship: NoneService Interrupted After Modification: No (And no impact on the UE in idle mode)Impact on Network Performance: None

CELLID Cell Index Meaning: Index of a cell, uniquely identifying a cell in a BSC6900.GSM cells are uniquely but not necessarily consecutively numbered within a BSC6900. For example, you can number aGSM cell 0 and number another GSM cell 3.GUI Value Range: 0~2047Unit: NoneActual Value Range: 0~2047MML Default Value: NoneRecommended Value: NoneParameter Relationship: NoneService Interrupted After Modification: No (And no impact on the UE in idle mode)Impact on Network Performance: None

CELLNAME Cell Name Meaning: Name of a cell. This parameter uniquely identifies a cell in a BSC6900.Cell names cannot contain the following invalid characters:, ; = " 'In addition, cell names cannot contain two or more consecutive %, two or more consecutive spaces, or more than threeconsecutive +.GUI Value Range: NoneUnit: NoneActual Value Range: 1~64 charactersMML Default Value: NoneRecommended Value: NoneParameter Relationship: NoneService Interrupted After Modification: No (And no impact on the UE in idle mode)Impact on Network Performance: None

LQCMODE Link QualityControl Mode

Meaning: It is applicable to the radio transmission environment to improve the link quality. Link adaptation (LA) indicatesadjusting the coding mode of the channel dynamically according to the transmission quality of the link. The linktransmission quality is measured by the 8PSK MEAN BEP and 8PSK CV BEP in the Packet EGPRS DownlinkAck/Nack message sent by the MS. The network side determines the coding mode for data transmission according tothe radio measurement report sent by the MS. The cell with the good transmission quality on the air interface is set tothe LA mode. Increment redundancy (IR) mode requires the network side retransmit the data block with differentpunching codes and the MS store the historical error information. The data block is retransmitted through cooperatederror correction function. With the IR mode, the transmission quality on the air interface of the cell can be improved.However, the MS must support this IR mode. The cell with the dissatisfied transmission quality on the air interface is setto the LR mode.GUI Value Range: IR(IR), LA(LA)Unit: NoneActual Value Range: IR, LAMML Default Value: NoneRecommended Value: IR(IR)Parameter Relationship: NoneService Interrupted After Modification: No (And no impact on the UE in idle mode)Impact on Network Performance: None

BEPPERIOD Bep Period Meaning: Average period for sending the measurement report over the EGPRS channelGUI Value Range: 0~10Unit: NoneActual Value Range: 0~10MML Default Value: NoneRecommended Value: 5Parameter Relationship: NoneService Interrupted After Modification: No (And no impact on the UE in idle mode)Impact on Network Performance: The larger the value of this parameter, the larger the proportion of the BEP historyinformation sent by an MS. The smaller the value of this parameter, the smaller the proportion of the BEP historyinformation sent by an MS.

UPFIXMCS Uplink FixedMCS Type

Meaning: Coding scheme of the uplink EDGE link. If the uplink uses the fixed coding scheme, this parameter is set to avalue ranging from MCS1 to MCS9. If the uplink uses the dynamic adjustment coding scheme, this parameter is set toUNFIXED.

Set EGPRS Parameters of 2G Cell(SET GCELLEGPRSPARA) http://localhost:7890/pages/GEB02251/01/GEB02251/01/resources/...

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GUI Value Range: MCS1(MCS1), MCS2(MCS2), MCS3(MCS3), MCS4(MCS4), MCS5(MCS5), MCS6(MCS6),MCS7(MCS7), MCS8(MCS8), MCS9(MCS9), UNFIXED(UNFIXED)Unit: NoneActual Value Range: MCS1, MCS2, MCS3, MCS4, MCS5, MCS6, MCS7, MCS8, MCS9, UNFIXEDMML Default Value: NoneRecommended Value: UNFIXED(UNFIXED)Parameter Relationship: NoneService Interrupted After Modification: No (And no impact on the UE in idle mode)Impact on Network Performance: If this parameter is set to UNFIXED(UNFIXED), the BSC dynamically selects asuitable coding scheme based on the radio environment, increasing the uplink EGPRS rate. If this parameter is set to avalue other than UNFIXED(UNFIXED), the BSC cannot select coding schemes dynamically based on the radioenvironment, decreasing the uplink EGPRS rate when the Um interface quality is poor.

UPDEFAULTMCS Uplink DefaultMCS Type

Meaning: Default coding scheme of the uplink EDGE link. If the uplink adopts the dynamic adjustment coding scheme,this parameter can be used to set the coding scheme for transmission during initial access. If the uplink uses the fixedcoding scheme, the TBF uses the fixed coding scheme.GUI Value Range: MCS1(MCS1), MCS2(MCS2), MCS3(MCS3), MCS4(MCS4), MCS5(MCS5), MCS6(MCS6),MCS7(MCS7), MCS8(MCS8), MCS9(MCS9)Unit: NoneActual Value Range: MCS1, MCS2, MCS3, MCS4, MCS5, MCS6, MCS7, MCS8, MCS9MML Default Value: NoneRecommended Value: MCS2(MCS2)Parameter Relationship: NoneService Interrupted After Modification: No (And no impact on the UE in idle mode)Impact on Network Performance: If this parameter is set to a higher value and the quality on the Um interface is poor,the speed of increasing the PS service rate is lower. If this parameter is set to a lower value and the quality on the Uminterface is good, the speed of increasing the PS service rate is lower.

DNFIXMCS Downlink FixedMCS Type

Meaning: Coding scheme of the downlink EDGE link. If the downlink uses the fixed coding scheme, this parameter isset to a value ranging from MCS1 to MCS9. If the downlink uses the dynamic adjustment coding scheme, thisparameter is set to UNFIXED.GUI Value Range: MCS1(MCS1), MCS2(MCS2), MCS3(MCS3), MCS4(MCS4), MCS5(MCS5), MCS6(MCS6),MCS7(MCS7), MCS8(MCS8), MCS9(MCS9), UNFIXED(UNFIXED)Unit: NoneActual Value Range: MCS1, MCS2, MCS3, MCS4, MCS5, MCS6, MCS7, MCS8, MCS9, UNFIXEDMML Default Value: NoneRecommended Value: UNFIXED(UNFIXED)Parameter Relationship: NoneService Interrupted After Modification: No (And no impact on the UE in idle mode)Impact on Network Performance: If this parameter is set to UNFIXED(UNFIXED), the BSC dynamically selects asuitable coding scheme based on the radio environment, increasing the downlink EGPRS rate. If this parameter is set toa value other than UNFIXED(UNFIXED), the BSC cannot select coding schemes dynamically based on the radioenvironment, decreasing the downlink EGPRS rate when the Um interface quality is poor.

DNDEFAULTMCS Downlink DefaultMCS Type

Meaning: Default coding scheme of the downlink EDGE link. If the downlink adopts the dynamic adjustment codingscheme, this parameter can be used to set the coding scheme for transmission during initial access. If the downlinkuses the fixed coding scheme, the TBF uses the fixed coding scheme.GUI Value Range: MCS1(MCS1), MCS2(MCS2), MCS3(MCS3), MCS4(MCS4), MCS5(MCS5), MCS6(MCS6),MCS7(MCS7), MCS8(MCS8), MCS9(MCS9)Unit: NoneActual Value Range: MCS1, MCS2, MCS3, MCS4, MCS5, MCS6, MCS7, MCS8, MCS9MML Default Value: NoneRecommended Value: MCS6(MCS6)Parameter Relationship: NoneService Interrupted After Modification: No (And no impact on the UE in idle mode)Impact on Network Performance: If this parameter is set to a higher value and the quality on the Um interface is poor,the speed of increasing the PS service rate is lower. If this parameter is set to a lower value and the quality on the Uminterface is good, the speed of increasing the PS service rate is lower.

UPE2AFIXMCS UplinkEGPRS2-AFixed MCS Type

Meaning: Fixed coding scheme that is used on the uplink EGPRS2-A link. If the uplink uses the fixed coding scheme,this parameter can be set to any one in MCS1-6 and UAS7-11. If the uplink uses the dynamic coding scheme, thisparameter can be set to UNFIXED.GUI Value Range: MCS1(MCS1), MCS2(MCS2), MCS3(MCS3), MCS4(MCS4), MCS5(MCS5), MCS6(MCS6),UAS7(UAS7), UAS8(UAS8), UAS9(UAS9), UAS10(UAS10), UAS11(UAS11), UNFIXED(UNFIXED)Unit: NoneActual Value Range: MCS1, MCS2, MCS3, MCS4, MCS5, MCS6, UAS7, UAS8, UAS9, UAS10, UAS11, UNFIXEDMML Default Value: NoneRecommended Value: UNFIXED(UNFIXED)Parameter Relationship: This parameter is valid only when EGPRS2A is set to YES.Service Interrupted After Modification: No (And no impact on the UE in idle mode)Impact on Network Performance: If this parameter is set to UNFIXED(UNFIXED), the BSC dynamically selects asuitable coding scheme based on the radio environment, increasing the uplink EGPRS2-A rate. If this parameter is setto a value other than UNFIXED(UNFIXED), the BSC cannot select coding schemes dynamically based on the radioenvironment, decreasing the uplink EGPRS2-A rate when the Um interface quality is poor.

UPE2ADEFAULTMCS UplinkEGPRS2-ADefault MCSType

Meaning: Default coding scheme used on the uplink EGPRS2-A link. If the uplink uses the dynamic coding scheme, thisparameter specifies the coding scheme that is used for the transmission in initial access. If the uplink uses the fixedcoding scheme, the TBF uses the fixed coding scheme.GUI Value Range: MCS1(MCS1), MCS2(MCS2), MCS3(MCS3), MCS4(MCS4), MCS5(MCS5), MCS6(MCS6),UAS7(UAS7), UAS8(UAS8), UAS9(UAS9), UAS10(UAS10), UAS11(UAS11)Unit: NoneActual Value Range: MCS1, MCS2, MCS3, MCS4, MCS5, MCS6, UAS7, UAS8, UAS9, UAS10, UAS11MML Default Value: NoneRecommended Value: MCS6(MCS6)


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Parameter Relationship: This parameter is valid only when EGPRS2A is set to YES.Service Interrupted After Modification: No (And no impact on the UE in idle mode)Impact on Network Performance: If this parameter is set to a higher value and the quality on the Um interface is poor,the speed of increasing the PS service rate is lower. If this parameter is set to a lower value and the quality on the Uminterface is good, the speed of increasing the PS service rate is lower.

DNE2AFIXMCS DownlinkEGPRS2-AFixed MCS Type

Meaning: Fixed coding scheme that is used on the downlink EGPRS2-A link. If the downlink uses the fixed codingscheme, this parameter can be set MSC1-4, MSC7-8 or DAS5-12. If the downlink uses the dynamic coding scheme,this parameter is set to UNFIXED.GUI Value Range: MCS1(MCS1), MCS2(MCS2), MCS3(MCS3), MCS4(MCS4), MCS7(MCS7), MCS8(MCS8),DAS5(DAS5), DAS6(DAS6), DAS7(DAS7), DAS8(DAS8), DAS9(DAS9), DAS10(DAS10), DAS11(DAS11),DAS12(DAS12), UNFIXED(UNFIXED)Unit: NoneActual Value Range: MCS1, MCS2, MCS3, MCS4, MCS7, MCS8, DAS5, DAS6, DAS7, DAS8, DAS9, DAS10, DAS11,DAS12, UNFIXEDMML Default Value: NoneRecommended Value: UNFIXED(UNFIXED)Parameter Relationship: This parameter is valid only when EGPRS2A is set to YES.Service Interrupted After Modification: No (And no impact on the UE in idle mode)Impact on Network Performance: If this parameter is set to UNFIXED(UNFIXED), the BSC dynamically selects asuitable coding scheme based on the radio environment, increasing the downlink EGPRS2-A rate. If this parameter isset to a value other than UNFIXED(UNFIXED), the BSC cannot select coding schemes dynamically based on the radioenvironment, decreasing the downlink EGPRS2-A rate when the Um interface quality is poor.

DNE2ADEFAULTMCS DownlinkEGPRS2-ADefault MCSType

Meaning: Default coding scheme used on the downlink EGPRS2-A link. If the downlink uses the dynamic codingscheme, this parameter specifies the coding scheme that is used for the transmission in initial access. If the downlinkuses the fixed coding scheme, the TBF uses the fixed coding scheme.GUI Value Range: MCS1(MCS1), MCS2(MCS2), MCS3(MCS3), MCS4(MCS4), MCS7(MCS7), MCS8(MCS8),DAS5(DAS5), DAS6(DAS6), DAS7(DAS7), DAS8(DAS8), DAS9(DAS9), DAS10(DAS10), DAS11(DAS11),DAS12(DAS12)Unit: NoneActual Value Range: MCS1, MCS2, MCS3, MCS4, MCS7, MCS8, DAS5, DAS6, DAS7, DAS8, DAS9, DAS10, DAS11,DAS12MML Default Value: NoneRecommended Value: DAS6(DAS6)Parameter Relationship: This parameter is valid only when EGPRS2A is set to YES.Service Interrupted After Modification: No (And no impact on the UE in idle mode)Impact on Network Performance: If this parameter is set to a higher value and the quality on the Um interface is poor,the speed of increasing the PS service rate is lower. If this parameter is set to a lower value and the quality on the Uminterface is good, the speed of increasing the PS service rate is lower.

ADJUSTULMCSTYPE Support EGPRSUplink MCSDynamic Adjust

Meaning: Mode of dynamically adjusting the EGPRS uplink coding scheme.value 1 indicates that the uplink coding scheme is adjusted according to downlink quality measurements reported byMS;value 2 indicates that the uplink coding scheme is adjusted according to uplink quality measurements reported by BTS.GUI Value Range: 1(According to downlink quality measurements reported by MS), 2(According to uplink qualitymeasurements reported by BTS)Unit: NoneActual Value Range: 1, 2MML Default Value: NoneRecommended Value: 2(According to uplink quality measurements reported by BTS)Parameter Relationship: NoneService Interrupted After Modification: No (And no impact on the UE in idle mode)Impact on Network Performance: It is recommended that this parameter be set to 2, so that the uplink rate is increased.

ULMEANBEPDegradeLevel Constant forCalculatingActual ULMEAN_BEP

Meaning: Constant used to calculate the actual MEAN_BEP when adjusting uplink coding schemesThe BSC uses the following formula when adjusting uplink coding schemes:MEAN_BEP actually used = MEAN_BEP reported by the BTS - Value of this parameterDecreasing the MEAN_BEP reported by the BTS enables MSs to choose lower-level coding schemes.GUI Value Range: 0~31Unit: NoneActual Value Range: 0~31MML Default Value: NoneRecommended Value: 0Parameter Relationship: NoneService Interrupted After Modification: No (And no impact on the UE in idle mode)Impact on Network Performance: If this parameter is set to a small value within the valid range, the single-timeslotthroughput and the retransmission rate increase. If this parameter is set to a large value within the valid range, there isa high probability that low-level coding schemes are used. In this case, the retransmission rate and the single-timeslotthroughput decrease.

ULCVBEPDegradeLevel Constant forCalculatingActual ULCV_BEP

Meaning: Constant used to calculate the actual Variation Co-efficient for the Bit Error Probability (CV_BEP) whenadjusting uplink coding schemes. Decreasing CV_BEP helps decrease MEAN_BEP values and instructs MSs to uselow-level coding schemes.GUI Value Range: 0~7Unit: NoneActual Value Range: 0~7MML Default Value: NoneRecommended Value: 0Parameter Relationship: NoneService Interrupted After Modification: No (And no impact on the UE in idle mode)Impact on Network Performance: The smaller the value of this parameter, the higher the throughput on a single timeslot.As a result, the retransmission rate increases. The larger the value of this parameter, the lower the uplink codingscheme. As a result, the retransmission rate decreases, but the throughput on a single timeslot also decreases.


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SelectCSMap BEP-MCSMapping Tablefor Adjusting ULCS

Meaning: BEP-MCS mapping table used for adjusting uplink coding schemesThe BEP-MCS mapping table is generally used together with the optimized BEP measurement algorithm.GUI Value Range: Optimized_Map(Optimized Map), RTT_Map(RTT Map), BEP_Map(BEP Map)Unit: NoneActual Value Range: Optimized_Map, RTT_Map, BEP_MapMML Default Value: NoneRecommended Value: Optimized_Map(Optimized Map)Parameter Relationship: NoneService Interrupted After Modification: No (And no impact on the UE in idle mode)Impact on Network Performance: None

UseHistoryCS PreferentiallyUsing ValidHistorical CS

Meaning: Whether an MS preferentially uses a valid historical coding scheme during the establishment of an EGPRSTBFWhen this parameter is set to OFF, an MS preferentially uses a historical coding scheme if the historical coding schemeis MCS7, MCS8, or MCS9. If the historical coding scheme is not MCS7, MCS8, or MCS9, the MS uses the codingscheme specified by Default Uplink MCS and Default Downlink MCS.When this parameter is set to ON, an MS uses a valid historical coding scheme.GUI Value Range: OFF(OFF), ON(ON)Unit: NoneActual Value Range: OFF, ONMML Default Value: NoneRecommended Value: ON(ON)Parameter Relationship: NoneService Interrupted After Modification: No (And no impact on the UE in idle mode)Impact on Network Performance: Setting this parameter to OFF(Off) leads to a decrease in the number of EGPRS datablocks using high-rate coding schemes and large fluctuations in the number of EGPRS data blocks using differentcoding schemes. Setting this parameter to ON(On) leads to an increase in the number of EGPRS data blocks usinghigh-rate coding schemes and small fluctuations in the number of EGPRS data blocks using different coding schemes.

ULFirstBlkChangeCS Adjusting CurrCS RecevingFirst UL DataBlock

Meaning: Whether to adjust the current coding scheme upon receiving the first data block carried on an uplink EGPRSTBFGUI Value Range: OFF(OFF), ON(ON)Unit: NoneActual Value Range: OFF, ONMML Default Value: NoneRecommended Value: OFF(OFF)Parameter Relationship: This parameter is valid only when Support EGPRS Uplink MCS Dynamic Adjust is set to 2.Service Interrupted After Modification: No (And no impact on the UE in idle mode)Impact on Network Performance: If this parameter is set to OFF, the current coding scheme is adjusted after the BSCreceives a certain number of data blocks carried on an uplink EGPRS TBF. This deteriorates transmission performance.If this parameter is set to ON, the current coding scheme is adjusted after the BSC receives the first data block carriedon an uplink EGPRS TBF. This improves transmission performance.

NoDataReportBEP Adjusting theBEP If No DataBlocks Received

Meaning: Whether to adjust the uplink coding scheme if the BSC fails to receive data blocks from an MS in Abis over IPmode.If the parameter is set to OFF(Off), the uplink coding scheme is not adjusted.If the parameter is set to ON(On), the uplink coding scheme is adjusted.GUI Value Range: OFF(OFF), ON(ON)Unit: NoneActual Value Range: OFF, ONMML Default Value: NoneRecommended Value: ON(ON)Parameter Relationship: This parameter is valid only if ADJUSTULMCSTYPE is set to 2.Service Interrupted After Modification: No (And no impact on the UE in idle mode)Impact on Network Performance: If this parameter is set to OFF(Off) and the BSC fails to receive uplink data blocksbecause of poor Um interface quality, the coding scheme is not adjusted, but the probability that uplink temporary blockflows (TBFs) are abnormally released increases. This leads to an increase in uplink TBF releases. If this parameter isset to ON(On) and the BSC fails to receive uplink data blocks because of poor Um interface quality, the coding schemeis moderately adjusted, but the coding scheme for TBF assignment does not increase. This leads to a decrease inuplink TBF releases.

DLPriorityDegradeULMCS Change Currt ULCS toLower-Level IfDL Ser Prefer

Meaning: Whether to change the current uplink coding scheme to a lower-level one if an MS preferentially processesdownlink servicesGUI Value Range: OFF(OFF), ON(ON)Unit: NoneActual Value Range: OFF, ONMML Default Value: NoneRecommended Value: OFF(OFF)Parameter Relationship: NoneService Interrupted After Modification: No (And no impact on the UE in idle mode)Impact on Network Performance: If this parameter is set to OFF and the downlink throughput of an MS is higher thanthe uplink throughput, the BSC does not allocate low-rate coding schemes to MSs. In this case, the uplinkretransmission rate may increase and there is high probability that high-rate coding schemes are used in the uplink. Ifthis parameter is set to ON and the downlink throughput of an MS is higher than the uplink throughput, the uplink codingscheme is changed to be lower than the downlink coding scheme. In this case, the uplink retransmission rate decreasesand there is low probability that high-rate coding schemes are used in the uplink.

EstULOnDLChooseCS Choosing UL CSPrev Rel TBF IfUL TBFs Est inDL TBFs

Meaning: Choosing an initial uplink coding scheme if an uplink EGPRS TBF is established in a downlink EGPRS TBFWhen this parameter is set to OFF, the default uplink coding scheme is used.When this parameter is set to Historical Coding Scheme, the coding scheme used in the previously released uplinkEGPRS TBF is adopted.When this parameter is set to Lower-Level Coding Scheme, the BSC first works out a coding scheme based on anuplink quality measurement report from the BTS, the BSC then compares the calculated coding scheme with the codingscheme used in the previously released uplink EGPRS TBF, and lastly the BSC chooses the lower one.


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When this parameter is set to Higher-Level Coding Scheme, the BSC first works out a coding scheme based on anuplink quality measurement report from the BTS, the BSC then compares the calculated coding scheme with the codingscheme used in the previously released uplink EGPRS TBF, and lastly the BSC chooses the higher one.GUI Value Range: OFF(OFF), HISTORICMCS(Historical Coding Scheme), LOWERMCS(Lower-Level Coding Scheme),HIGHERMCS(Higher-Level Coding Scheme)Unit: NoneActual Value Range: OFF, HISTORICMCS, LOWERMCS, HIGHERMCSMML Default Value: NoneRecommended Value: HISTORICMCS(Historical Coding Scheme)Parameter Relationship: NoneService Interrupted After Modification: No (And no impact on the UE in idle mode)Impact on Network Performance: If this parameter is set to OFF, the uplink retransmission rate increases and there is ahigh probability that high-level coding schemes are used. If this parameter is set to Historical Coding Scheme, the uplinkaccess success rate decreases and there is a high probability that high-level coding schemes are used. If thisparameter is set to Lower-Level Coding Scheme, the uplink access success rate increases when the radio environmentis unfavorable. If this parameter is set to Higher-Level Coding Scheme, there is a high probability that high-level codingschemes are used when the radio environment is favorable.

ChooseBEPMap BEP-MCSMapping Tablefor Adjusting DLCS

Meaning: BEP-MCS mapping table used for adjusting downlink coding schemesThe BEP-MCS mapping table is generally used together with the optimized BEP measurement algorithm.GUI Value Range: Optimized_Map(Optimized map), Original_Map(Original map), Protocol_Map(Protocol map),IRLA_Map(IR/LA Optimized map)Unit: NoneActual Value Range: Optimized_Map, Original_Map, Protocol_Map, IRLA_MapMML Default Value: NoneRecommended Value: IRLA_Map(IR/LA Optimized map)Parameter Relationship: NoneService Interrupted After Modification: No (And no impact on the UE in idle mode)Impact on Network Performance: None

Example

1. To set the EGPRS parameters for a 2G cell (Cell Index = 0; Link Quality Control Mode = IR), run the following command:SET GCELLEGPRSPARA: IDTYPE=BYID, CELLID=0, LQCMODE=IR;

2. To set the EGPRS parameters for a 2G cell (Cell Name = cell-11; Link Quality Control Mode = IR), run the following command:SET GCELLEGPRSPARA: IDTYPE=BYNAME, CELLNAME="cell-11", LQCMODE=IR;

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Set Egprs Parameters of 2g Cell(Set Gcellegprspara)

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