7/23/2019 05 3G UMTS Troubleshooting

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UMTS TROUBLESHOOTINGUMTS TROUBLESHOOTING

3G TELKOMSEL KALIMANTAN3G TELKOMSEL KALIMANTAN

19 March 200819 March 2008

7/23/2019 05 3G UMTS Troubleshooting

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Company Confdential2 Nokia Siemens Networks

1) Drop d! "o #$%%$&' N!$'h(or

TEMS log shows that signal is going down.

RSCP and Ec/No Mobile is weak

TEMS log and scanne in!omation showing di"eent SC.

#!te Cell Reselection Ec/No sit$ation is ok.

See ne%t pages !o typical sceen shot.

#dd missing neighbo

Symptoms

Reason & Sol$tion

7/23/2019 05 3G UMTS Troubleshooting

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Company Confdential3 Nokia Siemens Networks

1) Drop d! "o #$%%$&' N!$'h(or TEMS

Symptoms

' bad Ec/No( tansition to)dle Mode

* weak RSCP

+ discepancybetw. Scan &,e

- low S)R

high 0ER

1 stong Ec/Noa!te CellReselection

The call dops beca$se the Ec/No is too weak2 b$t a!te Cell Reselection2 the Ec/No o! a

di"eent Pilot is 3ey good dop like in 4SM 5

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Company Confdential4 Nokia Siemens Networks

2) Drop d! "o h$'h RT*+

TEMS log shows that R6 sit$ation is good. No Pilot Poll$tion

0ow ,e T% Powe

Call is dopped beca$se RNC e7$est )$ elease withcommand 8), elease e7$est 9 ,tan geneated eason:

RNC send an ,E 8RRConnction elease;$nspecifed:

7/23/2019 05 3G UMTS Troubleshooting

5/18Company Confdential5 Nokia Siemens Networks

2) Drop d! "o h$'h RT*+ ,TEMS)

Symptoms

' good Ec/No

( good RSCP

* no PilotPoll$tion

low ,e T%Powe

+ good S)R

- low 0ER

dl RRCConnection

Release

with Ca$se8$nspecifed:

7/23/2019 05 3G UMTS Troubleshooting

6/18Company Confdential

6 Nokia Siemens Networks

2) Drop d! "o h$'h RT*+ ,K1- .a//Trac! )

Long Time From 2. MSG 3. MSG 4. MSG Procedure ode 6. MSG radioNetwork

!4"3#"4$%6&4%2#& 'N S( 'L (T! id)*u)'e+ease'e,uest re+ease)due)to)utran)generated)reason

!4"3#"4$%6&4%3-# MS S( 'L (T! id)*u)'e+ease re+ease)due)to)utran)generated)reason

!4"3#"4$%6#!%6!2 Node)/ 03 1( 0! L FP (T (

!4"3#"4$%6#!%6!2 Node)/ 03 1( 0! L M (T ( u+ink(irectTranser *('7S!4"3#"4$%-24%!#- MS S( 'L (T! id)(irectTranser '7LMP

!4"3#"4$%-4!%&44 'N S( 'L (T! id)7rror*ndication

!4"3#"4$%-#2%--$ Node)/ 03 1( 0! (L FP (T (

!4"3#"4!%2-2%65& Node)/ 03 1( 0! (L FP (T (

!4"3#"4!%2-2%65& Node)/ 03 1( 0! (L M (T ( rrconnection'e+ease cause 8 unseciied

!4"3#"4!%4#!%366 Node)/ 03 1( 0! L FP (T (

!4"3#"4!%4#!%366 Node)/ 03 1( 0! L M (T ( rrconnection'e+easeom+ete

!4"3#"4!%5-4%-42 N/P L S( initiatingMessage id)commonMeasurement

!4"3#"4!%5&2%!26 N/P L S( initiatingMessage id)commonMeasurement

!4"3#"4!%63-%5#& N/P (L S( initiatingMessage id)radioLink(e+etion

!4"3#"4!%66#%244 N/P L S( succesu+9utcome id)radioLink(e+etion

!4"3#"4!%6&2%452 LP (L S( '7L

!4"3#"4!%6#!%5$2 LP L S( 'L

!4"3#"42%22!%&36 'N S( 'L (T! id)*u)'e+ease

!4"3#"42%2-#%62& MS S( 'L 'LS(

!4"3#"42%2#!%&34 'N S( 'L 'L

!4"3#"44%#5$%26# $ ' L FP (T '

!4"3#"44%#5$%26# $ ' L TM (T ' rrconnection'e,uest

!4"3#"44%#64%$2& N/P L S( initiatingMessage id)commonMeasurement

!4"3#"44%#-!%65$ N/P L S( initiatingMessage id)commonMeasurement!4"3#"44%##3%&-& $ F! (L FP (T F

!4"3#"44%##3%&-& $ F! (L M (T F rrconnection'e:ect cause 8 congestion

D,#MC;settingFTM#gain 9 6eede0oss 9 D,#MCatten$ation G ?d

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7/18Company Confdential

- Nokia Siemens Networks

3) .a// R!!c"$o& d! "o .o&'!%"$o& h$'hRT*+

TEMS log shows that R6 sit$ation is good.

No Pilot Poll$tion

0ow ,e T% Powe

Call is ReHected with eason 8Congestion:.

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8/18Company Confdential

& Nokia Siemens Networks Pa e

3) .a// R!!c"$o& d! "o .o&'!%"$o&,TEMS)

#!te the dop2 a new call attempt is eHected by RNC with Ca$se 8Congestion:

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Company Confdential# Nokia Siemens Networks

3) .a// r!!c"$o& d! "o .o&'!%"$o&,K1-Trac! )

New call is eHected by the RNC with ca$se Congestion. This iational beha3ioo! the RNC can be e%plained by the Congestion Contol #lgoithm which kicks inwhen RTAP is high and that is the case i! the TM#gain is not compensated bythe 6eede0oss and D$amco.

Long Time From 2. MSG 3. MSG 4. MSG Procedure ode 6. MSG radioNetwork

!4"3#"4$%6&4%2#& 'N S( 'L (T! id)*u)'e+ease'e,uest re+ease)due)to)utran)generated)reason

!4"3#"4$%6&4%3-# MS S( 'L (T! id)*u)'e+ease re+ease)due)to)utran)generated)reason

!4"3#"4$%6#!%6!2 Node)/ 03 1( 0! L FP (T (

!4"3#"4$%6#!%6!2 Node)/ 03 1( 0! L M (T ( u+ink(irectTranser *('7S!4"3#"4$%-24%!#- MS S( 'L (T! id)(irectTranser '7LMP

!4"3#"4$%-4!%&44 'N S( 'L (T! id)7rror*ndication

!4"3#"4$%-#2%--$ Node)/ 03 1( 0! (L FP (T (

!4"3#"4!%2-2%65& Node)/ 03 1( 0! (L FP (T (

!4"3#"4!%2-2%65& Node)/ 03 1( 0! (L M (T ( rrconnection'e+ease cause 8 unseciied

!4"3#"4!%4#!%366 Node)/ 03 1( 0! L FP (T (

!4"3#"4!%4#!%366 Node)/ 03 1( 0! L M (T ( rrconnection'e+easeom+ete

!4"3#"4!%5-4%-42 N/P L S( initiatingMessage id)commonMeasurement

!4"3#"4!%5&2%!26 N/P L S( initiatingMessage id)commonMeasurement

!4"3#"4!%63-%5#& N/P (L S( initiatingMessage id)radioLink(e+etion

!4"3#"4!%66#%244 N/P L S( succesu+9utcome id)radioLink(e+etion!4"3#"4!%6&2%452 LP (L S( '7L

!4"3#"4!%6#!%5$2 LP L S( 'L

!4"3#"42%22!%&36 'N S( 'L (T! id)*u)'e+ease

!4"3#"42%2-#%62& MS S( 'L 'LS(

!4"3#"42%2#!%&34 'N S( 'L 'L

!4"3#"44%#5$%26# $ ' L FP (T '

!4"3#"44%#5$%26# $ ' L TM (T ' rrconnection'e,uest

!4"3#"44%#64%$2& N/P L S( initiatingMessage id)commonMeasurement

!4"3#"44%#-!%65$ N/P L S( initiatingMessage id)commonMeasurement

!4"3#"44%##3%&-& $ F! (L FP (T F

!4"3#"44%##3%&-& $ F! (L M (T F rrconnection'e:ect cause 8 congestion

3) . // $ d . $ h$ h

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Company Confdential!$ Nokia Siemens Networks

3) .a// R!!c"$o& d! "o .o&'!%"$o& h$'hRT*+

Interference area

4ood 7$ality co3eage b$t bad $plink inte!eence that making calleHection

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Company Confdential!! Nokia Siemens Networks

) I&"!r!r!&c! 4 +$/o" +o//"$o&

TEMS log shows se3eal stong se3e2 b$t no dominantse3e sit$ation.

6e7$ent link additions and deletions.

See ne%t page !o typical seen shot.

Changes in R6 sit$ation e7$ied to establish dominantse3e.

Change o! downtilts. )ncease tilts o! !a sites

Change o! aIim$th.

Symptoms

Reason & Sol$tion

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Company Confdential!2 Nokia Siemens Networks

) I&"!r!r!&c! 4 +$/o" +o//"$o& ,TEMS)

Symptom

' No

dominantse3esit$ationca$ses!e7$ent So!t;B

( moe than* Pilots aewithin a -dRSCP;window

* Ec/)o is o!

a3eage7$ality J;'?d

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Company Confdential!3 Nokia Siemens Networks

) I&"!r!r!&c! 4 +$/o" +o//"$o& ,+/o")

Some o! ecommedationsto ed$ce pilot poll$tion

;Change SCTKLPPNL*!om *? to (1?

;PPN Ct$mL( !om '-?to '+

-) I&"!r%5%"!# Ha&do6!r 3G 2G $% &o" 7or$&'

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Company Confdential!4 Nokia Siemens Networks

-) I&"!r%5%"!# Ha&do6!r 3G2G $% &o" 7or$&'prop!r/5

No Bando3e !om ,TR#N to 4SM command attemptmessage when walking !om *g to (g

Bigh Dop ate on 3oice call

No )SB S$ccess Rate 3al$e

#ll elated adHacents ha3e been defned

M$st be defned all in!omation elated with cell base= egc id as n$mbe o! cell taget2 bsic n$mbe3efciation2 0#C n$mbeing and (g !e7 @

M$st be defned all in!omation elated with coe = (gMSC id on 4T and MSRN n$mbe @

Symptoms

Reason & Sol$tion

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Company Confdential!5 Nokia Siemens Networks

Tha& 5oTha& 5o

LONG .ALL SETU+ TIME

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Company Confdential!6 Nokia Siemens Networks

LONG .ALL SETU+ TIME

No action !om adio pat

6om Coe side2 thee is changing to make esponseR#N#P R# assignment and R#N#P )nitial Diect Tans!e!aste

Reason & Sol$tion

Symptom

BTM0 Doc$ment

LONG .ALL SETU+ TIME

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Company Confdential!- Nokia Siemens Networks

LONG .ALL SETU+ TIME

LONG .ALL SETU+ TIME

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Company Confdential!& Nokia Siemens Networks

LONG .ALL SETU+ TIME