nodeb troubleshooting(v100r007).ppt
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Internal
NodeB Troubleshooting
V100R007
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References
RAN Troubleshooting Cases
SUPPORT!UA"#$CO%
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U&on co'&letion of this course( )ou
*ill be able to+
,no* ho* to find NodeB faults
-ras& NodeB troubleshooting
'ethods
,no* ho* to &re.ent NodeB
faults
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Chapter 1 General Introduction
Chapter 1 General Introduction
Chapter 2 Typical CasesChapter 2 Typical Cases
Chapter 3 NodeB Fault PreventionChapter 3 NodeB Fault Prevention
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-eneral $ntroduction
Alar'
Alar' console
Alar' bo/
O%C Shell
Traffic statistics
ri.e test
Routine ins&ection
Custo'er co'&lain
The ways to fnd aultsThe ways to fnd aults
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Locating aultyequipments
$f RNC has fault( usuall) it *ill affect so'e Sites or all of Sites
$f NodeB has fault( usuall) it ust affect itself and the hando.er
successful rate of adacent cells
uring i'&le'entation or e/&ansion( *e can 2$nterchange 3
NodeB and udge the fault is because of RNC or NodeBuring 'aintenance( RNC faults don4t ust affect one NodeB
-eneral $ntroduction
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-eneral $ntroduction
RAN fault
Cell
Traffic5in6
$nterconnection
Cloc6
Antenna 8eeder
trans'ission
O&eration and 'aintenance
fault
O%C
Soft*are 5oading
RNO fault
Access
Call dro&Congestion
!ando.er
Common ault typesCommon ault types
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-eneral $ntroduction
Anal)9ing the Alar' $nfor'ation
Alar' infor'ation co'e fro' the RAN alar' s)ste'( indicated
usuall) through sound( light( 5#( and screen out&ut( etc
$t includes the detailed descri&tion of the abnor'alit)( &ossible
causes and restoration suggestions( in.ol.es the hard*are( lin6(trun6 and CPU loading ratio( etc $t is a gist for the fault anal)sis
and location
Anal)9ing the $ndicator Status
$ndicators can indicate the *or6 status of circuit( lin6( o&tical &ath(
node and acti.e:standb) 'ode besides that of the corres&onding
boards( usuall) used along *ith the alar' infor'ation generall)
Anal)9ing Traffic Statistics Result
$t is the 'ost useful 'ethod for locating RNO fault
Basic troubleshooting methodsBasic troubleshooting methods
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-eneral $ntroduction
Anal)9ing A&&aratus %eter Test Result
$t reflects the fault nature *ith the .isual and ;uantified data
So'e co''on A&&aratus %eter
< Signaling Anal)9er( Test &hone( Site'aster( etc
Tracing the $nterface
$t is a&&lied in locating the failure causes of subscriber call connection
and inter=office signaling coo&eration( etc
The trace result can hel& to find the cause of call failure directl) and
locate the &roble' or to get the inde/ for the subse;uent anal)sis
Traffic Test
$t is a si'&le and ;uic6 'ethod to udge *hether the call &rocessing
function and relati.e 'odules of the RAN are nor'al or not
Basic troubleshooting methodsBasic troubleshooting methods
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-eneral $ntroduction
Co'&arison:$nterchange
Co'&arison+ co'&are the faulted co'&onents or &heno'enon *ith the
nor'al ones( and find the differences so as to find the &roble'
< $t is usuall) used in the situation *ith si'&le fault range
$nterchange+ if the fault can not be located e.en after the standb)
co'&onents are re&laced( )ou can interchange the nor'al co'&onents
>such as board( o&tical fiber( etc? *ith the &otential faulted co'&onents(
and to co'&are the *or6 status so as to s&ecif) the fault range or &art
< $t is usuall) used in the situation *ith co'&licated fault range
S*itching:Resetting
$t can not locate the fault cause accuratel)( and due to the rando'ness of
soft*are running( the fault 'a) be not able to recur( thus it is difficult to
6no* the real fault and sol.e the &roble'
This 'ethod is ust an e'ergenc) 'ethod( a&&licable onl) in the
e'ergent situation
Basic troubleshooting methodsBasic troubleshooting methods
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-eneral $ntroduction
Contacting the Technical Su&&ort #ngineers of !ua*ei
Before )ou call( &lease collect infor'ation as follo*
etailed na'e of the office or site
5in6'an and tele&hone
Ti'e of fault occurring
Soft*are .ersion of the office or site
etailed descri&tion of fault
Alar' files( interface tracing files( traffic statistic result
Actions &erfor'ed after the fault4s occurring and the results
Proble' le.el and the ti'e )ou *ish to sol.e the &roble'
Basic troubleshooting methodsBasic troubleshooting methods
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Su''ar)
-eneral Procedures of Troubleshooting 8inding fault @udging 8ault @locating fault @Re'o.ing 8ault
Basic %ethods of 8ault udge'ent and 5ocation
8or si'&le fault
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Chapter 1 General IntroductionChapter 1 General Introduction
Chapter 2 Typical CasesChapter 2 Typical Cases
Chapter 3 NodeB Fault PreventionChapter 3 NodeB Fault Prevention
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Chapter 2 Typical CasesChapter 2 Typical Cases
2.1 Transmission Faults2.1 Transmission Faults
2.22.2 Operation and aintenance FaultsOperation and aintenance Faults
2.3 Cell Faults2.3 Cell Faults
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Trans'ission 8aults
RAN Transport Network
RAN transport network
2.5G/622M/155M
2M/34M
P!"
155M
155M
NodeB
icro#ave
NodeB
$NC$NC NodeB
NodeB NodeB
NodeB
NodeB
NodeB
Opti%
NodeB
Opti%Opti%
Opti%
Opti%
NodeB
!&'
NodeBNodeB
NodeB'!&
&ynchronal
net#or(
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Trans'ission Bro6en
< Trans'ission de.ice( board or #1 is fault)
%ore trans'ission de.ice( 'ore fault
< Trans'ission code is different >use CRC or not?
!igh B#R >bit error rate?
< %icro*a.e( !S5 trans'ission( es&eciall) in rain) *eather
< #1 connection ;ualit) is bad
$t *ill cause bad ;ualit)( e.en trans'ission bro6en
< The grounding s)ste' is fault)
Trans'ission 8aults
henomena and Causeshenomena and Causes
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Case!" #! Broken $to be continued %
Trans'ission 8aults
!escription
#1 bro6en(#1 ha.ing alar'
Trou)leshootin* methods
This could be due to interface board fault)( #1 &ort fault) or #1cable fault)
1 Chec6 for alar' on the board and #1 &ort
DSP BRD
DSP E1T1
$f board is fault)( then re&lace board
D Board not fault)( but #1 &ort ha.ing alar' Perfor' loo& bac6 teston local end
SET E1T1LOP > 5oo&bac6 T)&e E 5OCA5 ?
LOP E1T1 $NC
DSP E1T1 NodeB
SET E1T1LOP > 5oo&bac6 T)&e E NO5OOP?
$f #1 &ort is fault)( then re&lace board
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T%
$%
$%
T%$NC NodeB
Step 2: Local Loop Back
>> SET E1T1LOP (Loop type=local)
>> DSP E1T1
Step 2: Local Loop Back
>> SET E1T1LOP (Loop type=local)
>> LOP E1T1 (Activate loop)
>> SET E1T1LOP (Loop type=noloop)
Step 3: Remote Loopback
>> DSP E1T1
Step 3: Remote Loopback
>> SET E1T1LOP (Loop type=remote)
Step 1: Check Boar an port!>> DSP B"D
>> DSP E1T1
Step 1: Check Boar an port!>> DSP B"D
>> DSP E1T1
Case!" #! Broken $continued%
Trans'ission 8aults
Troubleshooting 'ethods
F Board not fault)( #1 &ort not fault (but alar' being in
e/istence then &erfor' loo& bac6 on far end and 'onitor
at RNC
&+T +1T1'OP ,'oop type-remote
!&P +1T1 $NC
$f trans&ort net*or6 is fault( then e/a'ine cable and
de.ice
Transportnet#or(
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Chapter 2 Typical CasesChapter 2 Typical Cases
2.1 Transmission Faults2.1 Transmission Faults
2.22.2 Operation and aintenance FaultsOperation and aintenance Faults
2.3 Cell Faults2.3 Cell Faults
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O&eration and %aintenance S)ste' 8aults
NodeB &ro.ides t*o 'odes of o&eration and
'aintenance
< Near end o&eration and 'aintenance
< 8ar end o&eration and 'aintenance
&undamental 'nowledge
$NC
&NTP &erver
2///
&u)net 2 &u)net 3
IPo0 local IP
IPo0 Peer IP
$NC B0 IP
&u)net
&u)net
'T 2
'T1
&u)net 1
BT&312+
NPT +thernet
Port IP address
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Case!" (ownloading )otware ackage Lasts Too Long*)ometimes )otware (ownloading &ails
O&eration and %aintenance S)ste' 8aults
escri&tion
$n the course of soft*are u&grading( it ta6es se.eral hours to
do*nload the soft*are &ac6age( and so'eti'es( the
soft*are do*nloading &rocedure fails
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Case!" (ownloading )otware ackage Lasts Too Long*)ometimes )otware (ownloading &ails
O&eration and %aintenance S)ste' 8aults
Troubleshooting 'ethods
8or 'aintenance o.er $PoA through RNC( chec6 *hether the
$PoA band*idth on RNC O&eration and %aintenance s)ste' is
too narro*
$ncrease the $PoA band*idth to s&eed u& soft*are do*nloading
&rogress based on the actual situation
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Case+" &ail to Log in to NodeB by Near #nd ,ode
O&eration and %aintenance S)ste' 8aults
escri&tion
$n near end 'aintenance 'ode( the O&eration and
%aintenance s)ste' can log in to NodeB nor'all) beforedo*nloading data configuration file "hen NodeB restarts
after the data configuration file do*nloading &rocedure
finishes( the O&eration and %aintenance s)ste' cannot log
in to NodeB b) near end 'ode( but can log in to it o.er $PoA
$n this case( board indicators are nor'al
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Case+" &ail to Log in to NodeB by Near #nd ,ode
O&eration and %aintenance S)ste' 8aults
Troubleshooting 'ethods
The reason for this fault 'a) be incorrect setting of $P address
of near end 'aintenance channel
< Ste& 1+ 5og in to NodeB o.er $PoA lin6 through O&erationand %aintenance s)ste'( configure $P for near end
'aintenance channel b) using the %%5 co''and S#T $P
Guer) *hether the setting is successful b) using the %%5
co''and 5ST $P
< Ste& D+ O&en the data configuration file on the configuration'anage'ent s)ste' to 'odif) the NodeB &ro&ert) %odif)
the local $P address as the .alue de'anded( do*nload the
data configuration file again( and then restart the NodeB
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Chapter 2 Typical CasesChapter 2 Typical Cases
2.1 Transmission Faults2.1 Transmission Faults
2.22.2 Operation and aintenance FaultsOperation and aintenance Faults
2.3 Cell Faults2.3 Cell Faults
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Cell 8aults&undamental&undamental
'nowledge'nowledge
NBAPHAU$THR#G
NBAPHC#55HS#TUPHR#G
NBAPHC#55HS#TUPHRSP
NBAPHCO%%HTRANSPHC!HS#TUPHR#G
NBAPHCO%%HTRANSPHC!HS#TUPHRSP
NBAPHSISH$N8OHUPAT#HR#G
NBAPHSISH$N8OHUPAT#HRSP
NBAPHAU$THRSP
NodeB $NC
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Case!" No C#LL )#T- R#.-#)T ,essage rom RNC/hile NodeB in Normal )tate
Cell 8aults
escri&tion
The logical cell cannot be setu& "hen )ou &erfor' ;uer) *ith
%%5 co''and on NodeB O&eration and %aintenance
s)ste'( the local cell resources are a.ailable( and both NCP
and CCP states are nor'al U&on recei&t the re;uest of
resource audit fro' NodeB O&eration and %aintenance
s)ste' b) %%5 co''and AT R#S( RNC deli.ers onl) a
resource audit co''and but no C#55 S#TUP R#GU#ST
'essage
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Cell 8aults
Troubleshooting 'ethods
Chec6 *hether the 'a/i'u' do*nlin6 &o*er re&orted b)NodeB in the audit 'essage is s'aller than the .alue
configured b) RNC
On NodeB O&eration and %aintenance s)ste'( use the
%%5 co''and SP C#55 to .ie* *hether the local cell
$ is consistent *ith that s&ecified in RNC
Case!" No C#LL )#T- R#.-#)T ,essage rom RNC /hile NodeB in Normal )tate
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Case+" Cell (eleted and )etup Repeatedly* RNC ,ulti0&ra 1ut0o0)ynchroni2ation Alarm 1ccurs* Cell )etup
Cell 8aults
escri&tion
8ro' the 'essage traced b) $ub interface( cell is deleted and
setu& re&eatedl) At the sa'e ti'e( there are 'ulti=fra'e out=of=
s)nchroni9ation alar's unable to be cleared in RNC But #1
cable state is a.ailable *hen ;ueried b) the %%5 co''and SP
#1T1 on NodeB O&eration and %aintenance s)ste'
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Case+" Cell (eleted and )etup Repeatedly* RNC ,ulti0&ra 1ut0o0)ynchroni2ation Alarm 1ccurs* Cell )etup
Cell 8aults
Troubleshooting 'ethods
The 'ost &ossible cause for this fault is that #1 *or6ing
'ode for NodeB is not consistent *ith that for RNC+ dual=
fra'e for NodeB( and 'ulti=fra'e for RNC
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Case3" 1nly 1ne Cell Can Be )etup due to,odifcation o Cell Radius
Cell 8aults
escri&tion
Originall)( cell 0 and cell D can be setu& nor'all) After
the radius of both cell 0 and cell D is 'odified fro'
DJKL7M ' to 1JFKL7M '( cell D is failed to setu& The
local cell is una.ailable due to lac6 of baseband
resources according to the ;uer) result *ith the
corres&onding %%5 co''and
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Case3" 1nly 1ne Cell Can Be )etup due to ,odifcation o Cell Radius
Cell 8aults
Troubleshooting 'ethods
The fault 'ust be caused b) lac6 of access
resources A set of access resources includes an
access AS$C and an access SP "hen the cell
radius is s'aller than or e;ual to FML7M '( a set of
access resources can su&&ort three cells "hen the
cell radius is greater than FML7M '( it can su&&ort
onl) one cell
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Case4" RNC (eletes Cell ater NodeB Responds with Celland Common Transport Channel )etup
Cell 8aults
escri&tion
RNC sends a C#55 S#TUP R#GU#ST 'essage to
NodeB( and NodeB re&orts a C#55 S#TUP
R#SPONS# 'essage to RNC Then RNC sends t*o
CO%%ON TRANSPORT C!ANN#5 S#TUP R#GU#ST
'essages U&on recei&t of the t*o CO%%ON
TRANSPORT C!ANN#5 S#TUP R#SPONS#
'essages fro' NodeB( the RNC sends a C#55#5#T$ON R#GU#ST 'essage instead of a SIST#%
$N8OR%AT$ON UPAT# R#GU#ST 'essage There is
no alar' in NodeB or RNC
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Case4" RNC (eletes Cell ater NodeB Responds with Cell and Common Transport Channel )etup
Cell 8aults
Troubleshooting 'ethods
The fault 'a) be relati.e to $ub interface user
&lane $n this case( it is necessar) to chec6 the
user &lane of NodeB and RNC in data
configuration and hard*are connection to see
*hether the) are consistent
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Chapter 1 General IntroductionChapter 1 General Introduction
Chapter 2 Typical CasesChapter 2 Typical Cases
Chapter 3 NodeB Fault PreventionChapter 3 NodeB Fault Prevention
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NodeB 8ault Pre.ention
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NodeB 8ault Pre.ention
!ard*are+ installation s&ecifications are 'ost i'&ortant Pa) 'ore attention to #1 connector
Pa) 'ore attention to feeder connector
Pa) 'ore attention to the *ater&roofer of antenna and feeder
s)ste'
Confir' the grounding and lightning &rotection
Chec6ing Running status
NodeB 'aintenance console
< 8irst( do 2'ulti=site fault ;uer)3(
< Then( tr) to re'o.e the fault according to the alar'
descri&tion and suggestion
< $f )ou cannot re'o.e the fault &ro.isionall)( confir' the
reason of e.er) fault at least
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***hua*eico'
Than6 Iou
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