trial increase pcpich & reduce total dl power

11 April 2023

Trial Increase PCPICH & Reduce Max TxPower

Prepared by :

NDPM

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Trial CPICH and DL Power

Trial Scenario :

Drive Test Before

Increase CPICH Power

Drive Test After 1

Fallback CPICH then decrease Max TXPower

Drive Test After 2

Fallback to original setting

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Methodology

Tools Used :TEMS Investigation 9.0, Scanner PCTEL Seagull Ex Mini, 2 K800i without external antenna.

Methodology : MS1 Scanner ARFCN ( 10563 )

MS2 UE K800i Idle Mode 3G Locked

MS3 UE K800i Dedicated Long Call 3G Locked

Drive Test Date :25-26 July 2012

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Trial Route

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Scanner RSCP

Note : Before Changing parameter

Note : After Change PCPICH Power from 33dBm to 36dBmSpot with red circle improved.

Note : Fallback PCPICH Power from 36dBm to 33dBmChange MAXTXPOWER from 46 to 43

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Scanner EcNo

Note : Before Change parameter

Note : After Change PCPICH Power from 33dBm to 36dBmSpots with red circle improved.


Key takeout: Scenario 2 is best option

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UE Idle RSCP




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UE Idle EcNo





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UE Dedicated RSCP




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UE Dedicated EcNo





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EcNo Before Percentage EcNo Aftrer 1 Percentage EcNo After 2 Percentage

0 t0 -4 5 0.37% 0 t0 -4 31 2.32% 0 t0 -4 33 2.72%

-4 to -8 405 29.96% -4 to -8 519 38.76% -4 to -8 398 32.78%

-8 to -12 467 34.54% -8 to -12 523 39.06% -8 to -12 516 42.50%

-12 to -20 475 35.13% -12 to -20 266 19.87% -12 to -20 267 21.99%

Total 1352 100.00% Total 1339 100.00% Total 1214 100.00%

>= -12 64.87% >= -12 80.13% >= -12 78.01%

Statistic Distribution for EcNo

EcNo Before Percentage EcNo Aftrer 1 Percentage EcNo After 2 Percentage

0 t0 -4 20 1.07% 0 t0 -4 99 6.25% 0 t0 -4 73 4.86%

-4 to -8 554 29.58% -4 to -8 741 46.81% -4 to -8 571 38.04%

-8 to -12 714 38.12% -8 to -12 638 40.30% -8 to -12 635 42.31%

-12 to -20 585 31.23% -12 to -20 105 6.63% -12 to -20 222 14.79%


>= -90 68.77% >= -90 93.37% >= -90 85.21%

Note : EcNo of Scanner

Note : EcNo of UE Idle

Note : EcNo of UE Dedicated

RSCP Before Percentage RSCP Aftrer 1 Percentage RSCP After 2 Percentage

0 t0 -4 27 1.47% 0 t0 -4 119 7.65% 0 t0 -4 87 5.82%

-4 to -8 553 30.02% -4 to -8 664 42.70% -4 to -8 502 33.60%

-8 to -12 608 33.01% -8 to -12 564 36.27% -8 to -12 605 40.50%

-12 to -20 654 35.50% -12 to -20 208 13.38% -12 to -20 300 20.08%


>= -90 64.50% >= -90 86.62% >= -90 79.92%

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DL Power Blocking

There are no DL power blocking during the trial.

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Summary

Purpose of trial : To make comparison EcNo level when changing parameter 1. PCPICH Power 2. Total DL Power

Conclusion : 1. By increasing PCPICH from 330dBm to 360dBm : RSCP is maintained EcNo is slightly improve on some spot 2. Change MAXTXPOWER from 460dBm to 430dBm : RSCP is slightly decreased at some spot EcNo is slightly improved on some spots. 3. Best EcNo distribution (samples of >= -12 dB) found in 2nd scenario when CPICH set to 36

dBm while Max Tx Power set to 46 dBm (40W), equal to 10% proportion.

Huawei Confidential 14 11 April 2023

trial increase pcpich & reduce total dl power

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