nodeb troubleshooting(v100r007).ppt

7/25/2019 NodeB Troubleshooting(V100R007).ppt

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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



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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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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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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



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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



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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'



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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




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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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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


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



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


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



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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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


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


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


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


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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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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nodeb troubleshooting(v100r007).ppt

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