Changing maxDlPowerCapability on NodeB

OSS and NOC
1

Hello i am having issues on changing maxdlpower on NodeB to match the one on the RNC. This is the feedback below

1527 RbsLocalCell=S1C1 448 !!! Processing failure :se.ericsson.cello.moframework.NoSuchAttributeException
TAG :“NoSuchAttribute” VARIABLES :“$attrName” = “maxDlPowerCapability”, “$moTypeName” = “RbsLocalCell”

2

Hi, @King, maxDlPowerCapability is read-only attribute. To change power on CPP configure maxTotalOutputPower on TpaDevice and NodeBSectorCarrier configuredMaxTxPower on BB

3

it is a DUW not BB. maxTotalOutputPower is already configured to the desired power . How do i get MaxTxPower on the DUW ?

4

Set the same value on RNC. For example for RRUS 01 set TpaDevice=1 maxTotalOutputPower 20, then on RNC UtranCell power to 420. Same power on RRUS 12 is TpaDevice 1 and 2 - both to 10. Or I don’t get you.

5

I am a little bit confused.on my network there is no BB we use a DUW. There is TpaDevice which i have set the MaxTotalOutputPower but i don’t have NodeBSectorCarrier

6

NodeBSectorCarrier is on BB nodes only.

DUW:
TpaDevice maxTotalOutputPower
BaseBand:
NodeBSectorCarrier configuredMaxTxPower

7

maxTotalOututPower has been set to 60 but maxDlpowerCapacity is 418 on the nodeB but on the RNC is 448.I want the value on the nodeB to match the RNC

8

What type of RRU? How may branches are configured? (get sector numberoftx) How many carriers in the sector? Is RRU shared for LTE-2100?

9

RRU TYPE :RRU2219B1
NumberTXBranches:1
NumberofCarriers:4
RRU is not shared

10

So you use only one branch which is 60Watts (Radio 2219 is 60x2 total power). 60/4 carriers is 15Watts which is 41.8 dBm. You have two options: first, to configure second branch and distribute two carries there and increase power to 30 Watts per carrier. And second: set power to 418 from RNC side. Also, maxDlPowerCapability may depend on configured attenuation.

11

thanks i will go with the first option,is there a command that can be used to add the additional branch or i have to reintegrate the node B ?

12

@King you need to unInitSector, set Sector numberOfTxBranches to 2, set maxTotalOutputPower on TpaDevice=1 and TpaDevice=2 to 60, then InitSector with arguments 2, 1. I believe, this should be enough. You may need to make sure the physical connections are correct.

1 Like
13

yh it is enough but there is another problem.the site was integrated with the wrong RBB.instead of RBB22_1B it was integrated using RBB12_1A.

Is there way to correct the radio building block without integration ?

14

Yes, you can change it while sector is in uninit state.

15

thanks it worked

1 Like