STC U900 Project RTWP Check List.ResumeAs we know, High RTWP
issue is the common issue in Refarming U900 project. Because in SDR
site scenario, GSM and U900 Frequency is close, and sharing the
same Jeeper, Feeder, Connecter, Antenna. If one of the hardware is
not good enough, it will cause RTWP issue by PIM.During U900 Pilot
Project in Hafer Al-batin, there are several kinds of reasons cause
RTWP issue. This document sums up those learning lessons. When
Dammam U900 Project coming, all of our teams should know well RTWP
issue details and how to do the RTWP check list. We do not want to
send team on site again and again. If like U900 Pilot RTWP issue,
STC customer will complain with us, and pending our process. So
integration team do the site checklist during MDT to resolve the
RTWP and orther hardware issue is very important to our
project.High RTWP performance is greater than -95dBm. Two channels
or single channel is continually and consistently higher than
-95dBm. During MDT time is non-busy traffic time. So its impossible
cause by Many user.Case of RTWP issue Channel configuration mistake
1Tx2R FREQBWH U900 need to be 4.2MHz (U2100 is 5MHz)( LST FREQBWH)
TMA and RCU(TMA again and Antenna attenuation configuraiton not
match) GSM TCH/BCCH Use Refarming Frequent (52~72) PIM by bad
hardware or not installed well (Jumper indoor or outdoor, Feeder,
Antenna) Exteral interference
Check List1 Channel confirguration mistakeDuring MDT, when
implementing team informs integration team ,the site hardwares are
already installed completely. The integration need to
confirguration two channels Rx for U900 carrier.Check waysolution1
integration team need to confirgure two channels for U9002 open
NodeB LMT, choose RTWP board monitor. If the RTWP value shows two
channels value is ok. If only shows single channel value is
mistake. Need to confirgure two channels.Board RTWP Monitor
Single Channelconfiguration issue
Two channel normal
2 PIM by bad hardware or installing badlyDuring MDT, RTWP board
monitor two channels Rx value. If one of them is high or both of
them are high. Need to take Action, Inform the implementing team to
check and change the Indoor Jumper and connector.And the
implementing team needs to bring some material (jumper
\connector\feeder\attenna and something else) on site during
MDT.
Step 1Try to check and replace the connector and Jumper indoor
by a new one. Then Monitor again. Most hardware problem will be
resolved by this action.Step 2If not, Step 1 not works, try to swap
the jumper with other sector which RTWP is Normal. To confirm is
RRU problem or Tx/Rx part problem.If RTWP high with the RRU, it
means RRU problem; If RTWP high with the Jumper, it means hardware
problem. We need to confirm again, its PIM reason or not by next
step 3.Step 3PIM test. From PIM test to confirm the RTWP issue is
caused by Feeder outdoor Jumper or Antenna, or notIf its caused By
PIM. So we try to change the outdoor Jumper first. If still high
RTWP, then we change the Attenna or the feeder step by step.
Operation detail
Operation 1Change U900cell PCPICH Power from 33dbm to
0dbmOperation 2Deactivate Cell HSDPAOperation 3Set U900 Downlink
Load to 90% U900Operation 42G submit idle burstOperation 5Then
rollback. After Operation 3 and after Operation4 we need to monitor
board RTWP value. If one of the channel turn high, It means PIM
isssue , Integration Team need to inform the implementing team to
change outdoor Jumper or Antenna or feeder and monitor the board
RTWP till RTWP is normal (less than -95dBm)
Step 4If PIM Test is normal. (After step3 - operation3 and
operation 4 RTWP not change.)Its maybe caused by external
interference .Then we need to scan FFT frequencyspectrum , and save
the monitor logfile. And send the result and logfile to RF
team.
Operation1: open FFT frequency test as below snapshot.
Choose one Broadband offline test As below snapshot
congfirugaiton RBW =100 KHz. And save the trace log file (add the
cellname for rename the log file names).
Operation2Deactivate 2G cellDeactivate U900 cell
Operation3Collect the logfiles by at least 15 minutes. And send
the log files to to RF team.External interferenceIf RTWP high is
not caused by PIM. Maybe its caused by external interference. We
need to do the FFT scan first. And record the monitor
logfiles.External interference source maybe is nearby GSM site use
(refarming 52~72 frequency) , microwave set(like in Hafer Batin),
different kinds of sets which use 900MHz frequency.And RF team will
confirm and send team on site to do the Scan test. Try to find the
External interference source out.TMA and RCUFor the Non-SDR sites
the U900 carrier channels install TMA (for RCU). The TMA gain is
12dB in U900 Pilot as the default value. So the attenuation need
configuration to to be 12dB also.We need to confirm how many sites
designed to install TMA and its type.(LST TMA/SCN ALD/DSP
RXBRANCH)
sumary
2987KPI RTWP733RTWP225212261026
site numberCell NumberIntegration2987KPI normal733RTWP
issue2252interference1226configuration1026
&G&F
&D,&P&N
solution
commandHHB99515 RTWP113:532G burstLMT:STR TRXBURSTTSTCELLA
-95dbmCellB -96dbm CellC -95dbm14:20U9000MOD UCELLPCPICH=0CELLA
-105dbmCellB -105dbm CellC -105dbm214:223G 90%DEA UcellHSDPASTR
DLSIMCELLA -105dbmCellB -105dbm CellC -105dbm32GDEA GCELL43G MOD
TXBRANCH 515:113GFFTNA615:50NA
Step110KMU900233dbm0dbmm12GRTWP32G burst243G
90%3RTWP52GHSUPAHSDPA 63G3.8M3.8M
operationAction1Deactive U900 neighbor sites near 10
KM10KMU900DEA UcellACT Ucell2Change cell PCPICH Power from 33dbm to
0dbm33dbm0dbmMod UPCPICHMod UPCPICHMOD UCELLMOD UCELL3Deactivate
Cell HSDPAU900HSDPADEA UcellHSDPAACT UcellHSDPA4Set Downlink Load
to 90% U90090%NodeBSTR DLSIMSTP DLSIM52G submit idle burst2Gburst2G
BSCSTR TRXBURSTTSTSTP TRXBURSTTST6Deactivate 2G cell2G2G BSCDEA
GcellACT Ucell7Deactivate U900 cellU900DEA UcellACT Ucell8offline
FFT scanning FFT9feedback the result to HQ
MDT operationStepStep operation detailCell for
examplecellnameU900 CellIDGSM cellnameGSM cellIndexLocalU900
CelIDaction mml commandrollback mml commandmonitor test1Change
U900cell PCPICH Power from 33dbm to 0dbmHHB977C2523MOD
UPCPICHPWR:CELLID=2523,MAXPCPICHPOWER=343,MINPCPICHPOWER=0;MOD
UCELL:CELLID=2523,PCPICHPOWER=0;MOD
UCELL:CELLID=2523,PCPICHPOWER=330;MOD
UPCPICHPWR:CELLID=2523,MAXPCPICHPOWER=343,MINPCPICHPOWER=280;
2Deactivate Cell HSDPAHHB977C2523DEA UCELLHSDPA:CELLID=2523;ACT
UCELLHSDPA:CELLID=2523;3Set U900 Downlink Load to 90%
U900HHB977C252312(10,11,12)MML command in NobeB LMT;STR
DLSIM:LOCELL=12,LR=90;MML command in NobeB LMT;STP
DLSIM:LOCELL=12;Monitor Borad RTWP trace high or not;If high,
PIM,need to inform the implementing team to change outdoor Jumper
or Antenna or feeder42G submit idle burstZHB977C493STR
TRXBURSTTST:OBJECTTYPE=BYCELL,IDTYPE=BYNAME,CELLNAME="ZHB977C",DURATH=1;STP
TRXBURSTTST:OBJECTTYPE=BYCELL,IDTYPE=BYNAME,CELLNAME="ZHB977C";Monitor
Borad RTWP trace high or not;If high, PIM,need inform the
implementing team to change outdoor Jumper or Antenna or feeder
CellIDCellNamePCPICHIDPCPICHTransmitPowerMaxTransmitPowerofPCPICHMinTransmitPowerofPCPICHPCPICHTXPowerinSmallDSSCoverage1691HHB904A233033003301692HHB904B233033003301693HHB904C233033003301792HHB931B233033003302421HHB968A230033003302422HHB968B230033003302423HHB968C23003300330
CAction1Deactive U900 neighbor sites near 10 KM10KMU900DEA
UcellACT Ucell11/25/14 5:442Change cell PCPICH Power from 33dbm to
0dbm33dbm0dbmMod UPCPICHMod UPCPICHMOD UCELLMOD UCELL11/25/14
5:453Deactivate Cell HSDPAU900HSDPADEA UcellHSDPAACT UcellHSDPA4Set
Downlink Load to 90% U90090%NodeBSTR DLSIMSTP DLSIM11/25/14 5:46CA
B 2014/11/25 5:49:15 11/25/14 5:5052G submit idle burst2Gburst2G
BSCSTR TRXBURSTTSTSTP TRXBURSTTST11/25/14 5:51ABRTWPc2014/11/25
5:54:51B2G6Deactivate 2G cell2G2G BSCDEA GcellACT Ucell2014/11/25
5:58:43ABAB7Deactivate U900 cellU900DEA UcellACT Ucell11/25/14
6:018offline FFT scanning FFT2014/11/25 6:11:10 9feedback the
result to HQ
931BActionRTWP start11/25/14 2:0111/25/14 2:031Deactive U900
neighbor sites near 10 KM10KMU900DEA UcellACT Ucell11/25/14
2:092Change cell PCPICH Power from 33dbm to 0dbm33dbm0dbmMod
UPCPICHMod UPCPICH11/25/14 2:17MOD UCELLMOD UCELL3Deactivate Cell
HSDPAU900HSDPADEA UcellHSDPAACT UcellHSDPA11/25/14 2:204Set
Downlink Load to 90% U90090%NodeBSTR DLSIMSTP DLSIM931B:2014/11/25
2:23:46904ABC:2014/11/25 2:26:48968ABC:2014/11/25 2:29:0752G submit
idle burst2Gburst2G BSCSTR TRXBURSTTSTSTP
TRXBURSTTST931B:2014/11/25 2:41:09 2420904ABC:2014/11/25 2:44:24
2620968ABC:2014/11/25 2:46:57 27806Deactivate 2G cell2G2G BSCDEA
GcellACT Ucell2014/11/25 3:00:11931B 3580 904ABC 3580
ABC968ABC7Deactivate U900 cellU900DEA UcellACT Ucell11/25/14
3:128offline FFT scanning FFT11/25/14 3:33ACT
GCELL:IDTYPE=BYNAME,CELLNAME="ZHB904B",TRXIDTYPE=BYID;ACT
GCELL:IDTYPE=BYNAME,CELLNAME="ZHB968B",TRXIDTYPE=BYID;
DEA GCELL:IDTYPE=BYNAME,CELLNAME="ZHB904C";DEA
GCELL:IDTYPE=BYNAME,CELLNAME="ZHB968C";9feedback the result to
HQ11/25/14 3:50 11/25/14 4:1015
Sheet9
ABCAction1Deactive U900 neighbor sites near 10 KM10KMU900DEA
UcellACT Ucell11/25/14 4:322Change cell PCPICH Power from 33dbm to
0dbm33dbm0dbmMod UPCPICHMod UPCPICHMOD UCELLMOD UCELL11/25/14
4:343Deactivate Cell HSDPAU900HSDPADEA UcellHSDPAACT
UcellHSDPA11/25/14 4:354Set Downlink Load to 90% U90090%NodeBSTR
DLSIMSTP DLSIM11/25/14 4:37968C52G submit idle burst2Gburst2G
BSCSTR TRXBURSTTSTSTP TRXBURSTTST11/25/14 4:432G6Deactivate 2G
cell2G2G BSCDEA GcellACT Gcell11/25/14 4:48968CGSMUGGUGU7Deactivate
U900 cellU900DEA UcellACT Ucell11/25/14 4:562014/11/25 5:03:38
904B2014/11/25 5:08:43 904C931,904ACBGSM 8offline FFT scanning
FFT9feedback the result to HQ
sumary
2987KPI RTWP733RTWP225212261026
site numberCell NumberIntegration2987KPI normal733RTWP
issue2252interference1226configuration1026
&G&F
&D,&P&N
solution
commandHHB99515 RTWP113:532G burstLMT:STR TRXBURSTTSTCELLA
-95dbmCellB -96dbm CellC -95dbm14:20U9000MOD UCELLPCPICH=0CELLA
-105dbmCellB -105dbm CellC -105dbm214:223G 90%DEA UcellHSDPASTR
DLSIMCELLA -105dbmCellB -105dbm CellC -105dbm32GDEA GCELL43G MOD
TXBRANCH 515:113GFFTNA615:50NA
Step110KMU900233dbm0dbmm12GRTWP32G burst243G
90%3RTWP52GHSUPAHSDPA 63G3.8M3.8M
operationAction1Deactive U900 neighbor sites near 10
KM10KMU900DEA UcellACT Ucell2Change cell PCPICH Power from 33dbm to
0dbm33dbm0dbmMod UPCPICHMod UPCPICHMOD UCELLMOD UCELL3Deactivate
Cell HSDPAU900HSDPADEA UcellHSDPAACT UcellHSDPA4Set Downlink Load
to 90% U90090%NodeBSTR DLSIMSTP DLSIM52G submit idle burst2Gburst2G
BSCSTR TRXBURSTTSTSTP TRXBURSTTST6Deactivate 2G cell2G2G BSCDEA
GcellACT Ucell7Deactivate U900 cellU900DEA UcellACT Ucell8offline
FFT scanning FFT9feedback the result to HQ
Offline FFT testStepStep operation detailCell for
examplecellnameU900 CellIDGSM cellnameGSM cellIndexLocalU900
CelIDaction mml commandrollback mml commandmonitor test1Deactivate
2G cellZHB977C493DEA GcellACT Gcellsave the trace logfiles and send
to RF team2Deactivate U900 cell and co-site the other
sectorHHB977C
HHB977BHHB977A2523
25222521DEA UcellACT Ucellsave the trace logfiles and send to RF
team
CellIDCellNamePCPICHIDPCPICHTransmitPowerMaxTransmitPowerofPCPICHMinTransmitPowerofPCPICHPCPICHTXPowerinSmallDSSCoverage1691HHB904A233033003301692HHB904B233033003301693HHB904C233033003301792HHB931B233033003302421HHB968A230033003302422HHB968B230033003302423HHB968C23003300330
CAction1Deactive U900 neighbor sites near 10 KM10KMU900DEA
UcellACT Ucell11/25/14 5:442Change cell PCPICH Power from 33dbm to
0dbm33dbm0dbmMod UPCPICHMod UPCPICHMOD UCELLMOD UCELL11/25/14
5:453Deactivate Cell HSDPAU900HSDPADEA UcellHSDPAACT UcellHSDPA4Set
Downlink Load to 90% U90090%NodeBSTR DLSIMSTP DLSIM11/25/14 5:46CA
B 2014/11/25 5:49:15 11/25/14 5:5052G submit idle burst2Gburst2G
BSCSTR TRXBURSTTSTSTP TRXBURSTTST11/25/14 5:51ABRTWPc2014/11/25
5:54:51B2G6Deactivate 2G cell2G2G BSCDEA GcellACT Ucell2014/11/25
5:58:43ABAB7Deactivate U900 cellU900DEA UcellACT Ucell11/25/14
6:018offline FFT scanning FFT2014/11/25 6:11:10 9feedback the
result to HQ
931BActionRTWP start11/25/14 2:0111/25/14 2:031Deactive U900
neighbor sites near 10 KM10KMU900DEA UcellACT Ucell11/25/14
2:092Change cell PCPICH Power from 33dbm to 0dbm33dbm0dbmMod
UPCPICHMod UPCPICH11/25/14 2:17MOD UCELLMOD UCELL3Deactivate Cell
HSDPAU900HSDPADEA UcellHSDPAACT UcellHSDPA11/25/14 2:204Set
Downlink Load to 90% U90090%NodeBSTR DLSIMSTP DLSIM931B:2014/11/25
2:23:46904ABC:2014/11/25 2:26:48968ABC:2014/11/25 2:29:0752G submit
idle burst2Gburst2G BSCSTR TRXBURSTTSTSTP
TRXBURSTTST931B:2014/11/25 2:41:09 2420904ABC:2014/11/25 2:44:24
2620968ABC:2014/11/25 2:46:57 27806Deactivate 2G cell2G2G BSCDEA
GcellACT Ucell2014/11/25 3:00:11931B 3580 904ABC 3580
ABC968ABC7Deactivate U900 cellU900DEA UcellACT Ucell11/25/14
3:128offline FFT scanning FFT11/25/14 3:33ACT
GCELL:IDTYPE=BYNAME,CELLNAME="ZHB904B",TRXIDTYPE=BYID;ACT
GCELL:IDTYPE=BYNAME,CELLNAME="ZHB968B",TRXIDTYPE=BYID;
DEA GCELL:IDTYPE=BYNAME,CELLNAME="ZHB904C";DEA
GCELL:IDTYPE=BYNAME,CELLNAME="ZHB968C";9feedback the result to
HQ11/25/14 3:50 11/25/14 4:1015
Sheet9
ABCAction1Deactive U900 neighbor sites near 10 KM10KMU900DEA
UcellACT Ucell11/25/14 4:322Change cell PCPICH Power from 33dbm to
0dbm33dbm0dbmMod UPCPICHMod UPCPICHMOD UCELLMOD UCELL11/25/14
4:343Deactivate Cell HSDPAU900HSDPADEA UcellHSDPAACT
UcellHSDPA11/25/14 4:354Set Downlink Load to 90% U90090%NodeBSTR
DLSIMSTP DLSIM11/25/14 4:37968C52G submit idle burst2Gburst2G
BSCSTR TRXBURSTTSTSTP TRXBURSTTST11/25/14 4:432G6Deactivate 2G
cell2G2G BSCDEA GcellACT Gcell11/25/14 4:48968CGSMUGGUGU7Deactivate
U900 cellU900DEA UcellACT Ucell11/25/14 4:562014/11/25 5:03:38
904B2014/11/25 5:08:43 904C931,904ACBGSM 8offline FFT scanning
FFT9feedback the result to HQ