8.2 P ARAMETERS OPTIMIZATION FOR IMPROVING U PLINK C OVERAGE
8.2.5 eNB Tx Power Parameters Set
For coverage optimization process the primary set of parameters are for power settings which can have a big influence on coverage. The main coverage parameters are:
referenceSignalPower primarySyncSignalPowerOffset secondarySyncSignalPowerOffset pBCHPowerOffset
1050 1100 1150 1200 1250 1300 1350 1400
UL Coverage (m)
ulSyncSINROOStoSyncTreshold , ulSyncSINRsyncToOOSTreshold
First RRC reconfiguration for PUCCH/SRS Position
UL Coverage (m)
Recommended & Default Value= deltaFPUCCHFormat1= “deltaFm2”
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The values must be tuned so that cells coverage with same frequency does not overlap.
TLA6.0 supports 8 antennas and 2 antennas with OLC eNB (One Logical Cell, also named Supper Cell), 2 Antennas OLC eNB supports transmission mode 1/2/3/4 and 8 Antennas eNB supports transmission mode 1/2/3/7/8.
Two transmission schemes are inside TM7, i.e., two ports TxDiv and single port5 BeamForming are used.
Three transmission schemes are inside TM-8, i.e., two ports TxDiv , port7 or port8 single layer BeamForming and port7 & port8 dual-layer BeamForming are used.
For BF scheme in TM7 and TM8, the PBCH, PCFICH, PDCCH & PHICH are transmitted using TxDIV (port 0 and 1). Due to TxDiv encoding, the PBCH, PCFICH, PDCCH & PHICH are transmitted at -3dB compared to the configured setting. The PDSCH uses UE-adaptive beam and other channels use broadcast beam.
For TxDiv scheme in TM7 and TM8, due to TxDiv encoding, the PBCH, PCFICH, PDCCH & PHICH are transmitted at -3dB compared to the configured setting. All channels, including PDSCH and other channels, use broadcast beam.
Note that power configuration is set per antenna port if there is no specific description in TDD.
Due to the fixed maximum power of the PA, the maximum power per RE per antenna is 3dB less in 20MHz where the number of RE is doubled compared to 10 MHz and the maximum value for referenceSignalPower is lower in 20MHz bandwidth in TDD.
The following tables are provided respectively for 20MHz, 15MHz & 10MHz bandwidths. All power offsets in the following tables are per antenna port. Note that the OAM value of the offsets marked with an asterisk (*) is for 2 antennas (ports), and is 3 dB greater than the value in the following tables (for example, -3.0 dB in table is coded as 0.0 dB in OAM).
ReReccoommmmeennddeedd values for a 2×20W RRH Power & 10MHz in TM2/3/4:
Inputs Recommended values
2×20W radio
referenceSignalPower 18 dBm
primarySyncSignalPowerOffset -0.8 dB secondarySyncSignalPowerOffset -0.8 dB
pBCHPowerOffset -3.0 dB *
pDCCHPowerOffsetSymbol1 -3.3 dB * pDCCHPowerOffsetSymbol2and3 -3.3 dB *
pCFICHPowerOffset -2.0 dB *
pHICHPowerOffset -1.5 dB *
paOffsetPdsch -3 dB
pbOffsetPdsch 0 dB (PB = 1) cellDLTotalPower 43 dBm (20W)
Table 8-3: 2×20W RRH Power Recommended Values in TM2/3/4 (10 MHz bandwidth) ReReccoommmmeennddeedd values for a 2×20W RRH Power & 15MHz in TM2/3/4:
Inputs Recommended values
2×20W radio
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Inputs Recommended values
2×20W radio
referenceSignalPower 16 dBm
primarySyncSignalPowerOffset 0.2 dB secondarySyncSignalPowerOffset 0.2 dB
pBCHPowerOffset -3.0 dB *
pDCCHPowerOffsetSymbol1 -2.6 dB * pDCCHPowerOffsetSymbol2and3 -2.6 dB *
pCFICHPowerOffset -2.0 dB *
pHICHPowerOffset -2.0 dB *
paOffsetPdsch -3 dB
pbOffsetPdsch 0 dB (PB = 1) cellDLTotalPower 43 dBm (20W)
Table 8-4: 2×20W RRH Power Recommended Values in TM2/3/4 (15 MHz bandwidth) R
Reeccoommmmeennddeedd values for a 2×20W RRH Power & 20MHz in TM2/3/4:
Inputs Recommended values
2×20W radio
referenceSignalPower 15 dBm
primarySyncSignalPowerOffset -0.8 dB secondarySyncSignalPowerOffset -0.8 dB
pBCHPowerOffset -3.0 dB *
pDCCHPowerOffsetSymbol1 -3.3 dB * pDCCHPowerOffsetSymbol2and3 -3.3 dB *
pCFICHPowerOffset -2.0 dB *
pHICHPowerOffset -1.5 dB *
paOffsetPdsch -3 dB
pbOffsetPdsch 0 dB (PB = 1) cellDLTotalPower 43 dBm (20W)
Table 8-5: 2×20W RRH Power Recommended Values in TM2/3/4 (20 MHz bandwidth) R
Reeccoommmmeennddeedd values for a 8×5W RRH Power & 10MHz in TM2/3:
Inputs Recommended values
8×5W radio
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Inputs Recommended values
8×5W radio
referenceSignalPower 16 dBm
primarySyncSignalPowerOffset -0.8 dB secondarySyncSignalPowerOffset -0.8 dB
pBCHPowerOffset -3.0 dB *
pDCCHPowerOffsetSymbol1 -3.3 dB * pDCCHPowerOffsetSymbol2and3 -3.3 dB *
pCFICHPowerOffset -2.0 dB *
pHICHPowerOffset -1.5 dB *
paOffsetPdsch -3 dB
pbOffsetPdsch 0 dB (PB = 1) cellDLTotalPower 37 dBm (5W) Table 8-6: 8×5W RRH Power Recommended Values in TM2/3 (10 MHz bandwidth) R
Reeccoommmmeennddeedd values for a 8×5W RRH Power & 15MHz in TM2/3:
Inputs Recommended values
8×5W radio
referenceSignalPower 14 dBm
primarySyncSignalPowerOffset 0.2 dB secondarySyncSignalPowerOffset 0.2 dB
pBCHPowerOffset -3.0 dB *
pDCCHPowerOffsetSymbol1 -2.6 dB * pDCCHPowerOffsetSymbol2and3 -2.6 dB *
pCFICHPowerOffset -2.0 dB *
pHICHPowerOffset -2.0 dB *
paOffsetPdsch -3 dB
pbOffsetPdsch 0 dB (PB = 1) cellDLTotalPower 37 dBm (5W) Table 8-7: 8×5W RRH Power Recommended Values in TM2/3 (15 MHz bandwidth) R
Reeccoommmmeennddeedd values for a 8×5W RRH Power & 20MHz in TM2/3:
Inputs Recommended values
8×5W radio
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Inputs Recommended values
8×5W radio
referenceSignalPower 13 dBm
primarySyncSignalPowerOffset -0.8 dB secondarySyncSignalPowerOffset -0.8 dB
pBCHPowerOffset -3.0 dB *
pDCCHPowerOffsetSymbol1 -3.3 dB * pDCCHPowerOffsetSymbol2and3 -3.3 dB *
pCFICHPowerOffset -2.0 dB *
pHICHPowerOffset -1.5 dB *
paOffsetPdsch -3 dB
pbOffsetPdsch 0 dB (PB = 1)
cellDLTotalPower 37 dBm (5W)
Table 8-8: 8×5W RRH Power Recommended Values in TM2/3 (20 MHz bandwidth) R
Reeccoommmmeennddeedd values for a 8×5W RRH Power & 10MHz in TM7:
Inputs Recommended values
8×5W radio
referenceSignalPower 16 dBm
primarySyncSignalPowerOffset -0.8 dB secondarySyncSignalPowerOffset -0.8 dB
pBCHPowerOffset -3.0 dB *
pDCCHPowerOffsetSymbol1 -3.3 dB * pDCCHPowerOffsetSymbol2and3 -3.3 dB *
pCFICHPowerOffset -2.0 dB *
pHICHPowerOffset -1.5 dB *
paOffsetPdsch -3 dB
pbOffsetPdsch 0 dB (PB = 1)
port5PowerOffset 1.9 dB
cellDLTotalPower 37 dBm (5W)
Table 8-9: 8×5W RRH Power Recommended Values in TM7 (10 MHz bandwidth) ReReccoommmmeennddeedd values for a 8×5W RRH Power & 15MHz in TM7:
Inputs Recommended values
8×5W radio
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Inputs Recommended values
8×5W radio
referenceSignalPower 14 dBm
primarySyncSignalPowerOffset 0.2 dB secondarySyncSignalPowerOffset 0.2 dB
pBCHPowerOffset -3.0 dB *
pDCCHPowerOffsetSymbol1 -2.6 dB * pDCCHPowerOffsetSymbol2and3 -2.6 dB *
pCFICHPowerOffset -2.0 dB *
pHICHPowerOffset -2.0 dB *
paOffsetPdsch -3 dB
pbOffsetPdsch 0 dB (PB = 1)
port5PowerOffset 1.9 dB
cellDLTotalPower 37 dBm (5W)
Table 8-10: 8×5W RRH Power Recommended Values in TM7 (15 MHz bandwidth) ReReccoommmmeennddeedd values for a 8×5W RRH Power & 20MHz in TM7:
Inputs Recommended values
8×5W radio
referenceSignalPower 13 dBm
primarySyncSignalPowerOffset -0.8 dB secondarySyncSignalPowerOffset -0.8 dB
pBCHPowerOffset -3.0 dB *
pDCCHPowerOffsetSymbol1 -3.3 dB * pDCCHPowerOffsetSymbol2and3 -3.3 dB *
pCFICHPowerOffset -2.0 dB *
pHICHPowerOffset -1.5 dB *
paOffsetPdsch -3 dB
pbOffsetPdsch 0 dB (PB = 1)
port5PowerOffset 1.9 dB
cellDLTotalPower 37 dBm (5W)
Table 8-11: 8×5W RRH Power Recommended Values in TM7 (20 MHz bandwidth) ReReccoommmmeennddeedd values for a 8×5W RRH Power & 10MHz in TM8:
Inputs Recommended values
8×5W radio
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Inputs Recommended values
8×5W radio
referenceSignalPower 16 dBm
primarySyncSignalPowerOffset -0.8 dB secondarySyncSignalPowerOffset -0.8 dB
pBCHPowerOffset -3.0 dB *
pDCCHPowerOffsetSymbol1 -3.3 dB * pDCCHPowerOffsetSymbol2and3 -3.3 dB *
pCFICHPowerOffset -2.0 dB *
pHICHPowerOffset -1.5 dB *
paOffsetPdsch -3 dB
pbOffsetPdsch 0 dB (PB = 1) port7port8PowerOffset 1.9 dB
cellDLTotalPower 37 dBm (5W)
Table 8-12: 8×5W RRH Power Recommended Values in TM8 (10 MHz bandwidth) ReReccoommmmeennddeedd values for a 8×5W RRH Power & 15MHz in TM8:
Inputs Recommended values
8×5W radio
referenceSignalPower 14 dBm
primarySyncSignalPowerOffset 0.2 dB secondarySyncSignalPowerOffset 0.2 dB
pBCHPowerOffset -3.0 dB *
pDCCHPowerOffsetSymbol1 -2.6 dB * pDCCHPowerOffsetSymbol2and3 -2.6 dB *
pCFICHPowerOffset -2.0 dB *
pHICHPowerOffset -2.0 dB *
paOffsetPdsch -3 dB
pbOffsetPdsch 0 dB (PB = 1)
port7port8PowerOffset 1.9 dB
cellDLTotalPower 37 dBm (5W)
Table 8-13: 8×5W RRH Power Recommended Values in TM8 (15 MHz bandwidth) ReReccoommmmeennddeedd values for a 8×5W RRH Power & 20MHz in TM8:
Inputs Recommended values
8×5W radio
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Inputs Recommended values
8×5W radio
referenceSignalPower 13 dBm
primarySyncSignalPowerOffset -0.8 dB secondarySyncSignalPowerOffset -0.8 dB
pBCHPowerOffset -3.0 dB *
pDCCHPowerOffsetSymbol1 -3.3 dB * pDCCHPowerOffsetSymbol2and3 -3.3 dB *
pCFICHPowerOffset -2.0 dB *
pHICHPowerOffset -1.5 dB *
paOffsetPdsch -3 dB
pbOffsetPdsch 0 dB (PB = 1) port7port8PowerOffset 1.9 dB
cellDLTotalPower 37 dBm (5W)
Table 8-14: 8×5W RRH Power Recommended Values in TM8 (20 MHz bandwidth)
Note that, since TLA6.0, 8×10W RRH is delivered and could be used for 2 carriers CA (each carrier with 8×5W) or 1 carrier only (8×10W) scenario, respectively.
For the 2 carriers CA scenario, the recommended DL power setting is same as above 8×5W RRH power recommended values;
For the 1 carrier only scenario, just plus 3dB on referenceSignalPower and cellDLTotalPower, respectively, based on above 8×5W RRH power recommended values.
Based on field and analytical studies, ALU recommends:
Changing paOffsetPdsch to dB-3 to improve Reference Signal SINR
Adjusting CCCH’s and reference power offsets to maintain current amplifiers power utilization as well as to maintain PDSCH and CCCH’s SINR levels close to current level;
SCOPE: Improve Call Drop Rate.