E// 3G System Problems: Why the MP Load very high when 1 NodeB have CE Congession

[Interface]

Dear Experts,
We are facing with 1 problems: At 1 RNC Module, we have 1 NodeB with UL CE rich 80% at peak hour. When we don't set CeUlAdm value(it mean equal 100) - haven't got any problems with MP Load. When we set CeUlAdm's value lower than 80%(50% for example), the Load of this RNC Module increase to very high level(~100%) while RRC Attempt doesn't increase. After that, all sites at this RNC Module there are many RRC Reject due to MP Load High and all of mail KPIs are worse. The Sites at other RNC Module are not effected.
This problems happen at both P7 and W10B RNC versions. We don't used RRC Load Control feature at moment.

With this phenomenon, please help me why and how to resolve:
- Have any E*******'s 3G System System with same phenomenon ?
- Have any Problems with UL CE Adm theory at E******* System?
- Guide me the way to find the reason of this problems?

Thank so much!

[electron]

Maybe your GPB board related to this site is malfunctioning. I faces such a problem and gave a restart to that GPB board problem disappeared. Try it

[Interface]

Thanks Electron!
Will we restart this MP when it happen this problems? But after that, does this problems appear again or not?
Do you have any document or some thing like that description about this phenomenon?

[electron]

Actually in my case in 2 different RNC i faced such a problem but all cells located on GPB board had unreasonable rejection after restart did not appear again . It happened on W10 SW version
Thanks Electron!
Will we restart this MP when it happen this problems? But after that, does this problems appear again or not?
Do you have any document or some thing like that description about this phenomenon?

[sabila]

may u can check your setting for TX device for your node-B
beacuse in my network one time had problem like this.
may ucan share your result of comand INVH at node-B
and setting for your txdevice

[fon909]

Majorly, rise in MP load is related to increase in traffic. Phenomenon is, once traffic reaches a particular value increase in MP load is triggered, As per Accessibility algorithm RRC establishment check whether MP load is present, if yes that request is rejected. Due to initial request reject, more RRC attempts occurs as a result it further increases MP load and degraded KPI of entire RNC and Network.

First thing to do is identify culprit site, map the GPB board it is located on. Either load balance the board by migrating sites, or arrange for an additional boards.

[Interface]

may u can check your setting for TX device for your node-B
beacuse in my network one time had problem like this.
may ucan share your result of comand INVH at node-B
and setting for your txdevice

Thanks Sabila,
The result of INVH Command as the attached file. Our site have 2 Tx Card: TxHS06 & TxHs04 at Slot 10 &11. Both of them are TxDeviceGroup 1. Have any error with this configuration?
To Electron: We haven't restarted the GBP but restarted the RNC last month. The problems isn't disappear.

[Interface]

The result as below:

RBS001> invh

121019-08:17:06 10.98.73.17 8.0d RBS_NODE_MODEL_M_1_8 stopfile=/tmp/6745
................................................................................
=====================================================================================================================================
SMN APN BOARD SWALLOCATION S GREEN YELLO RED c/p d CPU PRODUCTNUMBER REV SERIAL MO
=====================================================================================================================================
0 1 CBU1 Main_CBU 1 ON 16HZ OFF 35% 31% 9% ROJ1192209/1 R5K TU8GD48564 1,Slot=1
0 2 ET-MFX RBS_ETMFX 1 ON OFF OFF 1% ROJ1192315/2 R1A TU8GE08789 1,Slot=2
0 8 RAX RBS_RAXB 1 ON 16HZ OFF 1% ROJ1192187/15 R1D TU8GD57153 1,Slot=8 (RaxR2e 64CE)
0 9 RAX RBS_RAXB 1 ON 16HZ OFF 3% ROJ1192187/14 R1D TU8GD59560 1,Slot=9 (RaxR2e 128CE)
0 10 TX6HS-06 RBS_TXB 1 ON 16HZ OFF 9% ROJ1192254/6 R1E TU8GD74785 1,Slot=10 (HsTx60 384CE)
0 11 TX6HS-04 RBS_TXB 1 ON 16HZ OFF 6% ROJ1192254/8 R1D TU8GD72822 1,Slot=11 (HsTx45 384CE)
0 12 RUIF RBS_RUIFB 1 ON 16HZ OFF 19% ROJ1192245/2 R2A TU8GD60764 1,Slot=12
-------------------------------------------------------------------------------------------------------------------------------------

=====================================================================================================================================
XPBOARD ST GREEN YELLO RED PRODUCTNUMBER REV SERIAL/NAME MO
=====================================================================================================================================
FCU 1 ON 16HZ OFF BGM1361002/1 R1D BJ31507147 AuxPlugInUnit=2
FU12 1 ON 16HZ OFF KRC11817/1 R3A TU8F887657 RbsSubrack=FU1,RbsSlot=2,AuxPlugInUnit=1 (2.1GHz)
FU12 1 ON 16HZ OFF KRC11817/1 R3A TU8F887536 RbsSubrack=FU1,RbsSlot=4,AuxPlugInUnit=1 (2.1GHz)
FU12 1 ON 16HZ OFF KRC11817/1 R3A TU8F887661 RbsSubrack=FU1,RbsSlot=6,AuxPlugInUnit=1 (2.1GHz)
RU22 1 ON 16HZ OFF KRC11818/6 R2B C822896326 RbsSubrack=RU1,RbsSlot=2,AuxPlugInUnit=1 (2.1GHz 60W 10MHz)
RU22 1 ON 16HZ OFF KRC11818/6 R2B C822851828 RbsSubrack=RU1,RbsSlot=4,AuxPlugInUnit=1 (2.1GHz 60W 10MHz)
RU22 1 ON 16HZ OFF KRC11818/6 R2B C822896308 RbsSubrack=RU1,RbsSlot=6,AuxPlugInUnit=1 (2.1GHz 60W 10MHz)
-------------------------------------------------------------------------------------------------------------------------------------
-------------------------------------------------------------------------------------------------------------------------------------


=====================================================================================================================================
MO SMN PRODUCT PRODUCTNUMBER REV SERIAL/NAME DATE transmissionType maxPwr fanConfiguration
=====================================================================================================================================
Subrack=1 0 Subrack ROJ605116/1 * DigSubrack ATM_TRANSMISSION 1000W NO_CPP_FAN
-------------------------------------------------------------------------------------------------------------------------------------

=====================================================================================================================================
MO SMN PRODUCT PRODUCTNUMBER REV SERIAL/NAME DATE activeSwitchPlane switchState
=====================================================================================================================================
Subrack=1 0 Backplane ROJ 605 116/1 R1B TY12415583 20090910 SWITCH_PLANE_A 11L
-------------------------------------------------------------------------------------------------------------------------------------


===============================================================================================================
ExtSr SMN ISLGroup/Link ST Slot/Port(MS) Slot/Port(ES) PortState
===============================================================================================================

=====================================================================================================================================
KeyId FeatureName licenseState featureState (NodeB or RbsLocalCells)
=====================================================================================================================================
CXC4010071/4005 StandardizedTma 0 0
CXC4010071/4006 StandardizedRet 0 0
CXC4020001 HsdpaDynamicCodeAllocation 1 1 1 1 1 1 1
CXC4020002 16Qam 1 1
CXC4020003 HsdpaFlexibleScheduler 1 1
CXC4020005 EnhancedUplinkIntroduction 1
CXC4020008 HsdpaIncrementalRedundancy 1 1 1 1 1 1 1
CXC4020010 RttPositioning 1
CXC4020011 Eul2msTti 0 0
CXC4020012 Mimo 0 0 0 0 0 0 0
CXC4020013 EnhancedLayer2 0 0 0 0 0 0 0
CXC4020014 64Qam 0 0
CXC4020015 MbmsIubEfficiency 0 0
CXC4020016 Grake 0 0
CXC4020018 4wayRxDiversity 0 0 0 0 0 0 0
CXC4020020 DlPowerControlEul 0 0
CXC4020023 HsdpaImprovedLinkAdaptation 0 0
CXC4020025 FDpchSrbOnHsdpa 0 0 0 0 0 0 0
CXC4020029 HsdpaMc 0 0 0 0 0 0 0
CXC4020030 PerHarqProcessGrant 0 0
CXC4020031 RetCascading 0 0
CXC4020032 HsdpaMcInactCtrl 0 0 0 0 0 0 0
CXC4030037 DualStackIub 0 0

=====================================================================================================================================
KeyId CapacityName licenseState licenseCapacity available/max (NodeB or RbsLocalCells)
=====================================================================================================================================
CXC4010071/4002 RbsChannelElementsUplink 1 192 192
CXC4010071/4003 RbsChannelElementsDownlink 1 80 256
CXC4021001 NumHsPdschCodes 1 15 14 14 14 14 14 14
CXC4021002 NumHsdpaUsers 1 32 32 32 32 32 32 32
CXC4021007 NumEulUsers 1 16 16 16 16 16 16 16
CXC4021008 Num40WPowerAmplifiers 0 0
CXC4021009 Num60WPowerAmplifiers 0 0
CXC4021010 NumCarriers 0 0

4HN031> get . txdivice

121019-08:42:20 10.98.73.17 8.0d RBS_NODE_MODEL_M_1_8 stopfile=/tmp/6745
=================================================================================================================
MO Attribute Value
=================================================================================================================
=================================================================================================================
Total: 0 MOs


RBS001> get . txdevice

121019-08:42:26 10.98.73.17 8.0d RBS_NODE_MODEL_M_1_8 stopfile=/tmp/6745
=================================================================================================================
MO Attribute Value
=================================================================================================================
Subrack=1,Slot=10,PlugInUnit=1,TxDeviceGroup=1 TxDeviceGroupId 1
Subrack=1,Slot=11,PlugInUnit=1,TxDeviceGroup=1 TxDeviceGroupId 1
=================================================================================================================
Total: 2 MOs

[Interface]

Dear Experts,
Have any reason and solution for my problems?

[sabila]

Dear interface can u give me result like this
GS023> get all numHsCodeResources

121022-16:12:24 10.10.123.29 9.0e RBS_NODE_MODEL_M_1_33 stopfile=/tmp/14351
=================================================================================================================
MO Attribute Value
=================================================================================================================
Subrack=1,Slot=10,PlugInUnit=1,TxDeviceGroup=1 numHsCodeResources 2
Subrack=1,Slot=11,PlugInUnit=1,TxDeviceGroup=1 numHsCodeResources 1
=================================================================================================================
Total: 2 MOs


GS023> get all numEulResources

bla bla bla

GS023> get all maxNumADchReservation


with my asumption
your
slot 10 numHsCodeResources 1
slot 11 numHsCodeResources 2

slot 10 numEulResources 1
slot 11 numEulResources 0

maxNumADchReservation =256

with calc modul TX45 and 60 support 128 *2
then
=slot10(128*2)+slot 11(128*2)-min(256,1.3(SHO factor)*32(HSuser)*6cell)
=512-min(256,249)
=512-249
=263

and compare with
CXC4010071/4003 RbsChannelElementsDownlink 1 80 256
so R99 still have enough CE

or your setting is wrong in txdevice

[Interface]

Thanks Sabila,
Our result as below:
3HN851> get all numHsCodeResources

121023-14:29:47 10.98.9.57 8.0p RBS_NODE_MODEL_M_1_8 stopfile=/tmp/22087
=================================================================================================================
MO Attribute Value
=================================================================================================================
Subrack=1,Slot=10,PlugInUnit=1,TxDeviceGroup=1 numHsCodeResources 3
Subrack=1,Slot=11,PlugInUnit=1,TxDeviceGroup=1 numHsCodeResources 3
=================================================================================================================
Total: 2 MOs


3HN851> get all numEulResources

121023-14:30:00 10.98.9.57 8.0p RBS_NODE_MODEL_M_1_8 stopfile=/tmp/22087
=================================================================================================================
MO Attribute Value
=================================================================================================================
Subrack=1,Slot=10,PlugInUnit=1,TxDeviceGroup=1 numEulResources 1
Subrack=1,Slot=11,PlugInUnit=1,TxDeviceGroup=1 numEulResources 0
=================================================================================================================
Total: 2 MOs


3HN851> get all maxNumADchReservation

121023-14:30:10 10.98.9.57 8.0p RBS_NODE_MODEL_M_1_8 stopfile=/tmp/22087
=================================================================================================================
MO Attribute Value
=================================================================================================================
Subrack=1,DownlinkBaseBandPool=1 maxNumADchReservation 128
=================================================================================================================
Total: 1 MO
So that, we cacl as below:
slot 10 numHsCodeResources 3
slot 11 numHsCodeResources 3

slot 10 numEulResources 1
slot 11 numEulResources 0

maxNumADchReservation =128

with calc modul TX45 and 60 support 128 *2
then
=slot10(128*2)+slot 11(128*2)-min(128,1.6(SHO factor)*32(HSuser)*6cell)
=512-min(128,307)
=512-128
=384

Is these any error with this configuration?

[sabila]

from your calc and the result of INVH
calc > INVH
so it's wrong setting

CXC4010071/4002 RbsChannelElementsUplink 1 192 192
CXC4010071/4003 RbsChannelElementsDownlink 1 80 256

maksimum numHsCodeResources+numEulResources in one slot is 2
try to change
slot 10 numHsCodeResources 1
slot 11 numHsCodeResources 2

slot 10 numEulResources 1
slot 11 numEulResources 0

[Interface]

HI Sabila,
Why our setting is wrong. Because,
- Each TX6HS 04 or 06 can support 3 numHsCodeResources base on Alex document.
- The RbsChannelElementsUplink is 192, equal to License and RbsChannelElementsDownlink is 256, larger than license.
Do you have any document say that we can setup maximum 2 HSPA Resource per each TX6HS?

[ninjafine]

HI Sabila,
Why our setting is wrong. Because,
- Each TX6HS 04 or 06 can support 3 numHsCodeResources base on Alex document.
- The RbsChannelElementsUplink is 192, equal to License and RbsChannelElementsDownlink is 256, larger than license.
Do you have any document say that we can setup maximum 2 HSPA Resource per each TX6HS?



Hi! It's ok to have numHsCodeResources=3 with your boards configuration. Check attachment below.
30144

I would strongly recommend to check RAB fails due UL. 192 Ch.El. in UL
sometimes is not enough even for 3 sectors and you have 6. Just add another RAX board for this site,
you may also decrease number of EUL users 16->2 as temporary solution.

[Interface]

Thanks Ninjafine,
Please sent to me your Macro to cacl the HSPA Resource Setting if you can!
As you say, why 1 Eul Ressource can support only for 3Cell, because it can support max to 6 Cell as Alex Document.

[alishir]

how can I increase my reputation

[ninjafine]

Thanks Ninjafine,
Please sent to me your Macro to cacl the HSPA Resource Setting if you can!
As you say, why 1 Eul Ressource can support only for 3Cell, because it can support max to 6 Cell as Alex Document.

Hi! You may find this macro below.
http://www.finetopix.com/showthread.php?31785-Baseband-Capacity-Estimation

(http://www.finetopix.com/showthread.php?31785-Baseband-Capacity-Estimation)