PaPb changes Impact in DL USER THROUGHPUT

[miles12]

Dear friend
We have modified pbpa from 1,-3 to 0,0. Resulting we have observed +45% Throughput gain with 10% data volume increment .

But we didn't change RS power ratherthan we have increased one 20W power license in LTE as there were headroom for RRU to use power.



Kindly support to know the reason for which factor Throughput has increased.

That would be really helpful for me if you help at earliest!




BR//
Miles

[justdream]

Could you please share your charts of improvement.

reason of improvement is that new setting provide more power for PDSCH (data channel)

[mounir34]

below the result in my network,thanks

42617






Could you please share your charts of improvement.

reason of improvement is that new setting provide more power for PDSCH (data channel)

[slava121]

Hi!
For what mode Pa, Pb are your graphs shown?


below the result in my network,thanks

42617

[mounir34]

change PAPB from 1,-3 to 0,0


Hi!
For what mode Pa, Pb are your graphs shown?

[miles12]

Dear Friend
Same cause as Mounir bhai shown here.

Could you please brief us How PDSCH (data CH) power increase in details pls??
BR//
Miles

[kevin_h811]

Hi Mounir34,

Is this Discrepancy correction value or TUning optimization to improve DL Tput?

Br//



change PAPB from 1,-3 to 0,0

[mounir34]

it was optimization tuning ,Huawei Default value is (1,-3)

Hi Mounir34,

Is this Discrepancy correction value or TUning optimization to improve DL Tput?

Br//

[auto_art]

I understood you are turning Power boost of on reference symbols.
It is normal for thoughput to increasea, as you have more power available for PDSCH, that carries the data.


Dear friend
We have modified pbpa from 1,-3 to 0,0. Resulting we have observed +45% Throughput gain with 10% data volume increment .

But we didn't change RS power ratherthan we have increased one 20W power license in LTE as there were headroom for RRU to use power.



Kindly support to know the reason for which factor Throughput has increased.

That would be really helpful for me if you help at earliest!




BR//
Miles

[techfolkcmr]

I understood you are turning Power boost of on reference symbols.
It is normal for thoughput to increasea, as you have more power available for PDSCH, that carries the data.
In umts if we reduce CPICH and improve HSDPA power throughput increased but EC/no decreases..Likewise what will be the advert effect in this case.

[macro]

https://forum.huawei.com/enterprise/en/huawei/m/ViewThread.html?tid=458849&lang=en

Helpfull topic about papb

[longtermevolution]

Dear friend
We have modified pbpa from 1,-3 to 0,0. Resulting we have observed +45% Throughput gain with 10% data volume increment .

But we didn't change RS power ratherthan we have increased one 20W power license in LTE as there were headroom for RRU to use power.


Kindly support to know the reason for which factor Throughput has increased.

That would be really helpful for me if you help at earliest!




BR//
Miles


With Pb=0 it meant you are no more power boosting.
You kept RS power same i think to keep the coverage intact as before.
42840
42841
Remember these tables you can see by setting PB=0 there is no increment on CRS RE but PDSCH power increase to 5/4 resulting in improvement in throughput.


Cheers!!!

[macro]

in our network, for example, we have b3, 20 W power, and config is RS power 152, Pa -3 Pb 1. If try to change Pa and Pb to 0;0, it makes error RRU power limit exceed, so need to use PaPb calculator from FMA. But if try to make 0;0, i also shoud reduce RS power from 152 to 122, so i lost coverage

[slava121]

Hi!
What's your band, BW?


in our network, for example, we have b3, 20 W power, and config is RS power 152, Pa -3 Pb 1. If try to change Pa and Pb to 0;0, it makes error RRU power limit exceed, so need to use PaPb calculator from FMA. But if try to make 0;0, i also shoud reduce RS power from 152 to 122, so i lost coverage

[macro]

Band 3 FDD 20 mhz

[slava121]

here is the link: https://5g-tools.com/4g-lte-rs-re-power-calculator/
here you can calculate the ReferenceSignalPwr value. your value RS power = 152 is correct, for Ra = -3 Pb = 1.Do you have a description of eRAN16.1 in hedex format?
PA for even power distribution:

Recommended Value
Dual-antenna or four-antenna: DB_3_P_A(-3 dB)
Single-antenna: DB0_P_A(0 dB)



Pb:

GUI Value Range
0~3



Enumeration Number/Bit
N/A



Unit
None



Actual Value Range
0~3



Default Value
1



Recommended Value
Single-antenna: 0; double-antenna: 1



Initial Value Setting Source
Default/Recommended Value

[macro]

Thanks, I will look, but according to my expirience in our network it is imposible to increase pa without loosing of rs power, so I havent improvinf of throughput.
Not sure, try to search hdx file

[slava121]

here is the download link for eRAN FDD Feature Documentation eRAN16.1: https://mega.nz/file/kHYwFYwb#Qy1BINBS6UzK8D1CldmpkyEqWONWiXxUGwwLqNv5H2U



Thanks, I will look, but according to my expirience in our network it is imposible to increase pa without loosing of rs power, so I havent improvinf of throughput.
Not sure, try to search hdx file