Troubleshooting of 3G KPI

8/13/2019 Troubleshooting of 3G KPI

1/134

RAN10 KPI Troubleshooting Guide INTERNAL

BOM Code Product N!e RAN10 KPI TroubleshootingGuide

Intendedudience

Product "ersion "100R010

#e$rt!ent %MT& Mintennce nd#e'elo$!ent #e$rt!ent

#ocu!ent "ersion "1(0

RAN10 KPI Troubleshooting Guide

Pre$red b) KPI Te! o* the %MT&Mintennce #e$rt!ent

#te +00,-.-/

Re'ieed b) #te

Re'ieed b) #te

A$$ro'ed b) #te

Huawei Technologies Co., td.

All rights reser!ed

+00,-0.-0/

+01.--2 3uei Con*identil Pge 1 o* 1.4


2/134


Re!ision Histor"

Version Date Description Author

"1(0 +00,-1-+0 The dr*t s co!$lete( &hen 5ue$ing6 7in 8in6 nd 9u 5nen

"1(0 +00,-.-/ The docu!ent s re'ised( &hen 5ue$ing6 7in 8in6 nd 9u 5nen

+01.--2 3uei Con*identil Pge + o* 1.4


3/134

RAN10 KPI Troubleshooting Guide :igures

Contents

1(1 Proble! #iscussion(((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((11

1(+ Nrroing the &co$e(((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((11

1(. Loc;ing the &cenrio((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((1+

1(4 #ri'e Test On &ite(((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((1+

1(< Re$roducing the Mirroring En'iron!ent(((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((1+

1(/ Proble! Anl)sis nd &u!!r)(((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((1.

+(1 KPI #e*inition(((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((14

+(+ In*luence :ctors(((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((14

+(. Anl)sis Process((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((1<

+(4 List o* Proble! In*or!tion ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((41

.(1 KPI #e*inition(((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((4+

.(+ In*luence :ctors(((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((4+

.(. Anl)sis Process((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((4.

.(4 List o* Proble! In*or!tion(((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((


4/134


/(+ Inter-RAT 3ndo'er *ro! G&M to 9C#MA >C& #o!in?((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((

/(+(1 KPI #e*inition(((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((

/(+(+ In*luence :ctors(((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((,

/(+(. Anl)sis Process((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((,0

/(. Inter-RAT 3ndo'er *ro! 9C#MA to GPR& >P& #o!in?(((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((( (,+

/(.(1 KPI #e*inition(((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((,+

/(.(+ In*luence :ctors(((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((,.

/(.(. Anl)sis Process((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((,.

/(4 Inter-RAT 3ndo'er *ro! GPR& to 9C#MA >P& #o!in?(((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((( (,<

/(4(1 KPI #e*inition(((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((,<

/(4(+ Anl)sis Process((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((,<

/(< List o* Proble! In*or!tion(((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((,/

2(1 Per*or!nce dt o* RNC(((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((,2

2(1(1 Pur$ose((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((,2

2(1(+ In*or!tion to Be Collected((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((,2

2(1(. Method((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((,2

2(+ RNC C3R@PC3R((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((,

2(+(1 Pur$ose((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((,

2(+(+ In*or!tion to Be Collected((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((,

2(+(. Method((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((,,

2(. RNC IO& Trcing((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((,,

2(.(1 Pur$ose((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((,,

2(.(+ In*or!tion to Be Collected((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((,,2(.(. Method((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((,,

2(4 RNC I:T&@C#T >%ser Plne? Trcing (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((10+

2(4(1 Pur$ose((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((10+

2(4(+ In*or!tion to Be Collected((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((10+

2(4(. Method((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((10+

2(< &tndrd &ignling Trcing on the RNC ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((102

2(


5/134


6/134


Figures

Impact of the PS service upon the RTWP when some neighboringcells are not configure!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"#

Impact of the CS service upon the RTWP when the neighboring cell is

not configure!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"$Satellite map of the %TS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"&

Trace RTWP waveform!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"&

Change in the number of subscribers of the cell!!!!!!!!!!!!!!!!!!!!!!!!!!!!"'

Signal (ualit) of neighboring cells!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"*

Impact of the burst of a large number of RRC connection re(uestsupon the RTWP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"+

Cell auit message!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!",

Cell signal (ualit)!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!*,

-easurement report!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!*,

CI. offset parameter!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!*/

Relation between RSCP faing an 0c12# faing!!!!!!!!!!!!!!!!!!!!!!!!!!!!+$

Comparison of hanover parameters!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!++

Flow on CS inter3RAT hanover out of &4!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!,"

Relocation Re(uire message!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!,*Relocation Comman message!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!,+

5anover Re(uest AC6 message!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!,7

Flow on CS hanover3in!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!,/

Signaling of CS inter3RAT hanover3in!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!/$

Relocation8Re(uest message!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!/"

Flow on PS inter3RAT hanover out of!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!/&

Flow on 9A:1RA: after the :0 accesses the "4 cell!!!!!!!!!!!!!!!!!!!!!!!!/*

+01.--2 3uei Con*identil Pge / o* 1.4


7/134


;uer)ing the worb) running the C.9 9.4 comman?!!!!!!!!!!!!//

T)pes of ob@ects to be trace!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!$##

I.S Tracing ialog bo=!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!$#$

-oreInfo ialog bo=!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!$#"

T)pe of trace ob@ect!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!$#&

Configuration page of CDT parameters!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!$#'

Configuration page of IFTS parameters!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!$#*

Configuration page of user3plane tracing!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!$#+

Configuration page of performance monitoring!!!!!!!!!!!!!!!!!!!!!!!!!!!!$#7:u interface tracing !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!$#,

Iub interface tracing!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!$#/

Iur interface tracing!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!$$#

;uer)ing the DSP coe of the C2!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!$$$

Configuring the ;PST port!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!$$"

Connecting the e(uipment ports!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!$$"

0nabling log tracing!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!$$&

Real3time performance monitoring!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!$$'

2C script configuration!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!$$'

0=porting the operation log b) running the 0P 9.4 comman!!!!!$$*

Alarm bo= of the 9-T!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!$$+

0=porting the alarms!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!$$7

0=porting the 2oe% configuration file through the -"###!!!!!!!!!!!$$,

Data Config File Transfer!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!$$,

FTP uploa!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!$$/

Setting the C5R level of the 2oe%!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!$"#

2oe% C5R reporting switch!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!$"#

;uer)ing the alarm information!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!$"$

Saving the alarm information!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!$"$

Alarm bo= of the 2oe% 9-T!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!$""



8/134


-oif)ing the properties of the monitor items of the 2oe% CDT! !$"&

0nabling CDT tracing of the 2oe% cells!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!$"&

%asic setting!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!$"'

Setting other monitor items!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!$"'

0nabling call trace to chec< whether an) neighboring cells are notconfigure!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!$"+

Configuration interface of intra3fre(uenc) -2CDT!!!!!!!!!!!!!!!!!!!!!!!$"+

-2CDT winow!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!$"7

Intra3fre(uenc) measurement control after the intra3fre(uenc)-2CDT is enable!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!$"7

Configuration interface of inter3fre(uenc) -2CDT!!!!!!!!!!!!!!!!!!!!!!!$",

Configuration interface of inter3RAT -2CDT!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!$"/

-essage tracing for the missing intra3fre(uenc) neighboring cells!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! $

Reporte message about the missing intra3fre(uenc) neighboringcells!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!$

-essage tracing for the missing inter3fre(uenc) neighboring cells!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! $&$

Reporte message about the missing inter3fre(uenc) neighboringcells!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!$&$

-essage about the missing inter3RAT neighboring cell!!!!!!!!!!!!!!!!!$&"

Anal)Bing the soft failure of the DSP through the C5R log!!!!!!!!!!!!$&&

Resetting the DSP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!$&&

Anal)Bing the special :0ID through the C5R log!!!!!!!!!!!!!!!!!!!!!!!!!!$&'

+01.--2 3uei Con*identil Pge o* 1.4


9/134

RAN10 KPI Troubleshooting Guide Tbles

Tables

Inicators relate to RRC setup failure !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!$*

Cell traffic countAnal)sis of power congestion!!!!!!!!!!!!!!!!!!!!!!!!!!!!$+

2umber of top congeste cells !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!""

Inicator of cell C0 congestion!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"/

2umber of C0s consume b) the DC5 service!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

2umber of C0s consume b) the 5S:PA service!!!!!!!!!!!!!!!!!!!!!!!!!!!!!&$

Anal)sis of cell coe congestion inicators !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!&'

Anal)sis of transmission congestion inicators !!!!!!!!!!!!!!!!!!!!!!!!!!!!!&*

Inicators of CS RA% setup failure!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!'&

Inicators of PS RA% setup failure!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!''

Inicators of PS R% setup failure!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!'7

Flow on R% setup failure because of invali configuration !!!!!!!!!!!!!',

-oels of the


10/134

RAN10 KPI Troubleshooting Guide Tbles



11/134


The docu!ent describes the troubleshooting !ethods *or the KPI-relted $roble!s in theco!!ercil 9C#MA netor;s6 thus $ro'iding re*erence *or the netor; !intennce $ersonnel(

$ Anal)sis -ethoolog) of 6PI3Relate Problems

$!$ Problem Discussion I* the custo!er6 netor; $lnning $ersonnel6 or custo!er ser'ice $ersonnel re$ort

so!e KPI-relted $roble!s6 )ou need to collect the relted in*or!tion nd understndthe $roble!s nd needs o* the *ield $ersonnel(

It is i!$ortnt to ;no the bc;ground o* the $roble!s6 es$ecill) the KPI-relted

$roble!s tht occur in co!!ercil netor;s( 5ou need to collect !ore in*or!tionbout the $roble!s b) $hone nd b) E!il( :irstl)6 )ou need to scertin the urgenc)nd i!$ortnce o* the $roble!s6 thus hel$ing )ou l) don $$ro$rite !esures(

#eter!ine hether the $roble!s re ;non $roble!s ccording to the collectedin*or!tion >*or e!$le6 $roble! descri$tion nd 'ersion?(

:or the KPI-relted $roble!s6 )ou need to obtin the 'ersion in*or!tion *irst( &o!e $roble!s re ;non $roble!s or relted to ;non bugs6 hich h'e been nl)ednd sol'ed(

There*ore6 the troubleshooting $ersonnel cn *irst obtin the bug in*or!tion orrelese notes o* the 'ersion to eli!inte the i!$cts o* ;non $roble!s u$on theKPIs(

According to the ti!e o* KPI chnges6 deter!ine hether the $roble!s re cused b)netor; o$ertions or $r!eter !odi*ictions6 nd nl)e the i!$cts o* netor;dDust!ent u$on the KPIs e!$hticll)(

$!" 2arrowing the ScopeA*ter understnding the $roble!s clerl)6 )ou cn nl)e the generl KPI dt nd the KPIdt o* the to$ N cells6 co!$re the nor!l KPI dt ith the bnor!l KPI dt6 nd thus*ind out the !in cuses tht **ect the KPIs >$er*or!nce counter?(

:or e!$le6 i* the cll dro$ rte increses6 )ou cn nl)e the cll dro$ rte o* the To$ Ncells nd co!$re the nor!l KPIs o* the To$ N cells ith the bnor!l KPIs o* the To$ N



12/134


cells( 5ou !) *ind tht cell is bnor!l nd its cll dro$ rte increses( B) nl)ing thebnor!l dt o* the cell nd co!$ring the nor!l KPIs ith the bnor!l KPIs6 )ou cndeter!ine hether the s)!$to! is the $ri!r) cuse o* the $roble!( I* )es6 the KPI-relted $roble!s o* the netor; cn be *ocused on the bnor!l cells(

$!& 9oc


13/134


nl)ed !ore clerl)( 3oe'er6 it is di**icult to si!ulte the *ield scenrios >trns!issionsttus nd signl sttus? in the 37( To 'eri*) the $roble!s cused b) the !odi*iction $r!eters6 there*ore6 it is necessr) to re$roduce the $roble!s in the 37( I* the $roble!soccur in the eisting netor;6 *ield dri'e test cn be re=uired usull)(

Note tht )ou !ust h'e $reli!inr) nl)sis o* the $roble!s be*ore re$roducing the $roble!s >unless the $roble!s re etre!el) urgent?( Otherise6 the re$roduction is blind(

$!+ Problem Anal)sis an Summar):irstl)6 )ou need to deter!ine hether the nl)ed $roble! is the !in in*luence *ctor o*the KPIs( This $oint is i!$ortnt6 becuse lots o* *ctors **ect the KPIs o* the netor;(5ou need to clerl) nl)e the !Dor *ctors tht cuse the KPI chnges or **ect the KPIs(

&econdl)6 it is lso i!$ortnt to su!!rie the $roble!s nd shre the relted e$erienceti!el)(

+01.--2 3uei Con*identil Pge 1. o* 1.4


14/134


" RRC Access Success Rate>Service12on3Service?

"!$ 6PI DefinitionRRC setu$ success rte >Nu!ber o* &uccess*ul RRC &etu$s?@ >Nu!ber o* RRCConnection Atte!$ts?

VS.RRC.SuccConnEstab.Rate F RRC.SuccConnEstab.sum @ FVS.RRC.AttConnEstab.Cell

"!" Influence FactorsThe $rocess o* RRC connection setu$ includes the *olloing ste$sH

1. The %E sends the RRC Connection Re=uest !essge through the RAC3(

#. The RNC sends the RRC Connection &etu$ !essge through the :AC3(

$. I* the RRC is estblished on the #C36 the %E sends the RRC Connection &etu$CMP !essge through the u$lin; dedicted chnnel *ter the donlin; dedictedchnnel is set u$ nd s)nchronied(

%. I* the RRC is estblished on the CC36 the %E directl) sends the RRC Connection&etu$ CMP !essge through the RAC3(

The RRC connection setu$ *ils in the *olloing scenriosH

The %E sends the RRC Connection Re=uest !essge6 but the RNC does not recei'ethe !essge(

The RNC recei'es the RRC Connection Re=uest !essge sent b) the %E nd deli'ersthe RRC Connection &etu$ !essge6 but the %E does not recei'e the RRC Connection&etu$ !essge(

The RNC recei'es the RRC Connection Re=uest !essge sent b) the %E6 nd deli'ersthe RRC Connection ReDect !essge(

The %E recei'es the RRC Connection &etu$ !essge6 but does not send the RRC&etu$ Co!$lete !essge(

The %E sends the RRC &etu$ Co!$lete !essge6 but the RNC does not recei'e the

!essge(



15/134


%sull)6 the $roble!s relted to RRC setu$ success rte re *ound through the $er*or!nce counter o* the RNC or users co!$lints >or dri'e test?( In the scenriohere the %E sends the RRC Connection Re=uest !essge but the RNC does notrecei'e the !essge6 the $roble! cn be *ound onl) through users co!$lints or dri'etest( In other scenrios6 the $roble! cn be *ound through the $er*or!nce counter(

%sull)6 RRC setu$ *ilure is cused b) the *olloing *ctorsH

%$lin; RAC3

#onlin; co'erge

Cell reselection $r!eter

#onlin; s)nchronition

%$lin; s)nchronition

Resource congestion

The e=ui$!ent is bnor!l(

Resource congestion includes $oer resource congestion6 CE resource congestion6

code resource congestion6 nd trns!ission resource congestion( :or the $roble!cused b) resource congestion6 )ou need to *irst chec; the ctul utilition o*resources nd nl)e the correctness o* congestion threshold nd con*igurtions(

:or the $roble! cused b) other *ctors6 the ir inter*ce o* RRC setu$ does not !;en) res$onse( Generll)6 %% Nore$l) is the !in $roble! tht cuses RRC connectionsetu$ *ilure(

"!& Anal)sis Process1. &iscussing the Proble', Ascertaining the Proble' (ac)ground and Product

*ersion, and +cluding the I'-acts o Known (ugs#eter!ine the ti!e t hich the RRC setu$ success rte decreses se'erel)6 nl)ehether the $roble! is cused b) netor; dDust!ent6 nd *ocus on the i!$cts o*netor; dDust!ent( Obtin the ;non bug in*or!tion bout the corres$onding'ersion >)ou cn in=uire o* the relted contct $erson o* the $roduct or in=uire boutthe in*or!tion bout si!ilr $roble!s o* other sites?6 nd deter!ine hether the $roble! is ;non $roble!(

#. Anal"/ing the ain cenarios in 2hich RRC etu- 3ails

Anl)e the chnge in the cuses o* RRC ccess *ilure through the $er*or!ncecounters on the RNC6 nd nl)e hich *ctor cuses the decline o* RRC setu$success rte( Tble 1 lists the cuses o* RRC ccess *ilure de*ined b) the $er*or!ncecounterH

Table 1 Indictors relted to RRC setu$ *ilure

-easurement Item Sub Items

RRC(:ilConnEstb(Cong "&(RRC(ReD(Poer(Cong

"&(RRC(ReD(%L(CE(Cong

"&(RRC(ReD(#L(CE(Cong

"&(RRC(ReD(Code(Cong

"&(RRC(ReD(%LI%BBndCong

"&(RRC(ReD(#LI%BBndCong

+01.--2 3uei Con*identil Pge 1< o* 1.4


16/134


-easurement Item Sub Items

"&(RRC(:ilConnEstb "&(RRC(ReD(RL(:il

RRC(:ilConnEstb(Cong

"&(RRC(ReD(AAL+(:il

RRC(:ilConnEstb(NoRe$l)

$. Anal"/ing the ain Causes o RRC Access 3ailure &ee-l"

*.RRC.Re4.Power.Cong

The RNC RRM !;es $oer d!ission lgorith! decision( I* *inding the decision onu$lin; or donlin; d!ission denil6 the RNC RRM initites RRC setu$ reDection(

In the RAN10 or erlier 'ersions6 the $oer d!ission $olic) *or RRC is s *ollosH

I* the RRC Connection Re=uest is cused b) e!ergenc) cll6 detch6 or registrtion6

directl) llo the RRC connectionJI* the RRC Connection Re=uest is cused b) other *ctors6

Allo the RRC connection ccording to the OLC threshold i* the OLC is enbledJdirectl) llo the RRC connection i* the OLC is disbled(

There*ore6 "&(RRC(ReD(Poer(Cong occurs hen the OLC is enbled in the netor;nd netor; lod is high enough to cuse congestion( I* RRC setu$ success rtedecreses becuse the indictor 'lue beco!es lrge suddenl)6 *ind the To$ N cells thtcuse $oer congestion nd then =uer) the chnges in the !i!u! RT9P>"&(MRT9P? nd !i!u! TCP >"&(MTCP? o* the To$ N cells( I* the RT9Pincreses se'erel)6 it indictes tht the $roble! is cused b) u$lin; $oer congestion(I* the TCP increses se'erel)6 it indictes tht the $roble! is cused b) donlin; $oer congestion(

RT9P

The RT9P increses *or the *olloing resonsH

3igh tr**ic

Eternl inter*erence

&o!e neighboring cells re not con*igured(

Cells re-estblish(


:or u$lin; $oer congestion >the RT9P increses?6 Dudge the cuses through thenl)sis o* $er*or!nce dt6 nd then $ro$ose $$ro$rite solution suggestions(

Tble 1 lists the relted $er*or!nce counters(

Table 1 Cell tr**ic count—Anl)sis o* $oer congestion

D9 :9

RB Nu!ber C& Erlng "&(AMR(Ctrl(#L1+(+ "&(AMR(Ctrl(%L1+(+

"&(RB(#LCon'C&(/4 "&(RB(%LCon'C&(/4

P& Erlng "&(RB(#LInterP&( "&(RB(%LInterP&(

"&(RB(#LInterP&(1/ "&(RB(%LInterP&(1/

"&(RB(#LInterP&(.+ "&(RB(%LInterP&(.+

+01.--2 3uei Con*identil Pge 1/ o* 1.4


17/134


D9 :9

"&(RB(#LInterP&(/4 "&(RB(%LInterP&(/4

"&(RB(#LInterP&(1+ "&(RB(%LInterP&(1+

"&(RB(#LInterP&(144 "&(RB(%LInterP&(144

"&(RB(#LInterP&(+


18/134


19/134


:or the cells in n re6 the co'erge directions re the s!e bsicll) nd the $roble! occurs t the s!e ti!e nd t the s!e *re=uenc)(

1) 9hen tr**ic is lo6 the RT9P o* !ulti$le cells in the s!e re increses tdi**erent degrees in the s!e ti!e seg!ent nd the s)!$to! lsts *or !ore thn

+0 !inutes(

2) I* trcing the 'e*or! bout the bnor!l RT9P >b) enbling the RT9Ptrcing ts; o* the cells?6 )ou cn *ind tht the RT9P 'ries gentl) nd hs nore!r;ble *luctution *ter the RT9P increses(

FMethod o* nl)sisH

Anl)e the $er*or!nce dtH In n re or cell here RRC $oer congestionoccurs6 chec; hether the $roble! occurs in the s!e ti!e seg!ent( %se the!ini!u! grnulrit) to =uer) the $er*or!nce dt( #uring the congestion $eriod6chec; hether the tr**ic o* the cell increses shr$l) nd thus the RT9P incresesbnor!ll) >eclude the *ctor tht tr**ic increses?(

Anl)e the PC3R logH :ilter out ll the bills o* RRC d!ission denil becuse o*the RT9P congestion6 nd deter!ine the occurrence o* congestion >s detiled sto the !inute nd second?(

Anl)e the geogr$hicl distributionH 7uer) the geogr$hicl distributionin*or!tion bout the cells( I* the co'erge directions o* the cells re the s!e6 it is $robble tht eternl inter*erence cuses the $roble!(

F&uggestionsH

I* the $roble! is cused b) eternl inter*erence6 c$ture the e'idence b) scnning thentenn inter*ce nd e$lin the cuse to the custo!er(

The RT9P increses bnor!ll) becuse so!e neighboring cells re not con*igured

There re to such scenriosH

3uei neighboring cell is not con*igured(

The cells o* other 'endors re not con*igured ith 3uei neighboring cell(

F:eturesH

In such scenrios6 the RT9P increses bnor!ll) becuse o* the !obilit) o*subscribers( The $roble! occurs t rndo! nd in the ti!e seg!ent during hichthe subscribers !o'e *re=uentl)(

I* the RT9P bnor!ll) increses !ore *re=uentl)6 RRC congestion nd ser'icecongestion occur !ore *re=uentl)(

:igure 1 shos the i!$ct o* di**erent t)$es o* ser'ices u$on the RT9P o* the cells>dt sourceH The O+ in Ger!n)?(

P& ser'iceH

The No;i cell is not con*igured ith 3uei neighboring cell( In the No;i cell6the P& [email protected] ser'ice is initited nd it is u$loded(

+01.--2 3uei Con*identil Pge 1, o* 1.4


20/134


21/134


3igure # I!$ct o* the C& ser'ice u$on the RT9P hen the neighboring cell is not con*igured

FMethod o* nl)sisH

Anl)e the $er*or!nce dt o* the congested cells6 nd *ind out the distributiono* occurrence ti!e o* $oer congestion(

Trce nd nl)e the RT9P nd nu!ber o* subscribers o* the cells in rel ti!e(

Anl)e hether the congested cells re not con*igured ith neighboring cellsthrough the NA&TAR >or through the nl)sis result o* the neighboring cellcon*igurtion o* the intelligent netor; o$ti!ition in the PC3R log?(

Chec; hether n) neighboring cells re not con*igured ccording to the $recedingnl)sis result nd engineering !$ in*or!tion(

F&uggestionsH

It is reco!!ended tht the corres$onding neighbor reltion should be con*igured(

FRe*erence cseH O+ BPCR cse

1. #uring the $eriod o* +00,-01-1+ to +00,-01-16 the *olloing cells re se'erel)congestedH +./,06 4.,/+6 +41046 +./,/6 .//6 +./26 nd +.201 o* Cluster%MT&&0044(

+01.--2 3uei Con*identil Pge +1 o* 1.4


22/134


Table 1 Nu!ber o* to$ congested cells

CellId CellName Time(As hour) VS.RRC.Rej.Power.CongVS.LCC.OverCongNumULVS.LCC.OverCongTimUL

23690 509310690S2 2009-1-12 20:00:00 335 3 680

24104 509311104S-2 2009-1-19 17:00:00 318 3 520

43692 509310692S-3 2009-1-15 12:00:00 238 1 320

24104 509311104S-2 2009-1-19 18:00:00 168 7 415

23690 509310690S2 2009-1-18 19:00:00 101 1 250

3686 509310686S-1 2009-1-16 14:00:00 89 1 260

23690 509310690S2 2009-1-15 13:00:00 63 2 145

23678 509310678S2 2009-1-18 20:00:00 39 1 75

43692 509310692S-3 2009-1-17 21:00:00 38 3 95

3686 509310686S-1 2009-1-16 12:00:00 37 4 155

23701 509310701S2 2009-1-14 18:00:00 26 1 40

23690 509310690S2 2009-1-15 20:00:00 22 3 135

23678 509310678S2 2009-1-13 18:00:00 19 1 40

23690 509310690S2 2009-1-15 11:00:00 18 1 60

43692 509310692S-3 2009-1-14 10:00:00 13 1 5

3678 509310678S1 2009-1-13 18:00:00 12 1 65

23696 509310696S2 2009-1-18 18:00:00 12 1 220

23945 509310945S2 2009-1-12 19:00:00 11 1 25

44104 509311104S-3 2009-1-19 16:00:00 8 1 15

23690 509310690S2 2009-1-14 18:00:00 7 1 85

23691 509310691S-2 2009-1-19 18:00:00 7 2 25

43685 509310685S3 2009-1-12 6:00:00 6 1 15

3701 509310701S1 2009-1-16 18:00:00 5 1 35

3673 509310673S1 2009-1-19 14:00:00 4 1 30

3686 509310686S-1 2009-1-19 15:00:00 4 1 20

3696 509310696S1 2009-1-17 19:00:00 4 2 75

23675 509310675S2 2009-1-18 13:00:00 4 1 20

23685 509310685S2 2009-1-16 12:00:00 4 1 40

23690 509310690S2 2009-1-17 19:00:00 4 1 30

23696 509310696S2 2009-1-17 12:00:00 4 1 65

23696 509310696S2 2009-1-17 18:00:00 4 1 55

23696 509310696S2 2009-1-17 19:00:00 4 6 155

43685 509310685S3 2009-1-13 15:00:00 4 1 25

44104 509311104S-3 2009-1-19 20:00:00 4 1 15

3675 509310675S1 2009-1-16 17:00:00 3 1 35

23676 509310676S2 2009-1-12 9:00:00 3 3 75

23685 509310685S2 2009-1-13 15:00:00 3 2 190

43678 509310678S3 2009-1-13 18:00:00 3 1 15

43685 509310685S3 2009-1-12 7:00:00 3 1 1544104 509311104S-3 2009-1-19 18:00:00 3 1 10

23690 509310690S2 2009-1-16 13:00:00 2 1 30

43676 509310676S3 2009-1-18 13:00:00 2 1 35

23676 509310676S2 2009-1-12 8:00:00 1 1 15

The stellite !$ o* the BT& shos tht No;i neighboring cell is nerb) +./,064./,+6 nd +4104( There*ore6 it is sus$ected tht No;i neighboring cell hs greti!$ct u$on the RT9P o* 3uei BT&(

+01.--2 3uei Con*identil Pge ++ o* 1.4


23/134


3igure $ &tellite !$ o* the BT&

#. On the RNC here the Cluster is locted6 select the to$ +0 se'erel) congested NodeBs *or RT9P trcing nd *ind the RT9P 'e*or! generted t the congestionti!e( #uring the $eriod o* 1/H00 to 12H006 )ou cn trce the 'e*or! o* Cell 44


24/134


3igure ; Chnge in the nu!ber o* subscribers o* the cell

$. 7uer) the neighboring cell con*igurtion in the con*igurtion scri$t( Cell 44


25/134


3igure < &ignl =ulit) o* neighboring cells

The RT9P increses bnor!ll) becuse cells re reestblished

F:eturesH

:or the e=ui$!ent or trns!ission reson6 cells re reestblished( 9hen the cells reenbled gin6 lrge nu!ber o* RRC connection re=uests re generted becuse o*cell reselection o'er di**erent subs)ste!s(

The RT9P increses bnor!ll) ithin short $eriod becuse o* the burst o* lrgenu!ber o* RRC connection re=uests( As result6 hen the u$lin; $oer d!issionlgorith! is enbled6 so!e RRC connection re=uests re reDected becuse o* $oercongestion( I* the cell hs lrge nu!ber o* subscribers6 the rise in the RT9P 'luelsts *or longer $eriod(

As 'eri*ied in the lb6 the RT9P increses to n bnor!l le'el i* there re lrgenu!ber o* RRC connection re=uests( :or detils6 see :igure 2(

+01.--2 3uei Con*identil Pge +< o* 1.4


26/134


3igure = I!$ct o* the burst o* lrge nu!ber o* RRC connection re=uests u$on the RT9P

FMethod o* nl)sisH

9ithin to or three !inutes *ter cells re reestblished6 the RT9P *luctutescontinuousl)(

9hen both the d!ission lgorith! nd OLC lgorith! re enbled6 lrgenu!ber o* RRC connection re=uests ith the cuse o* cell reselection o'erdi**erent subs)ste!s re reDected nd other t)$es o* ser'ice re=uests re lsoreDected(

Cell reestblish!ent lr!H 7uer) the s)ste! lr!s nd chec; hether the*olloing lr!s re generted in the ti!e seg!ent hen the RT9P incresesbnor!ll)H

%$lin; CPRI Inter*ce Abnor!l or &AAL Lin; %n'ilble @ &CTP Lin; #on orCell un'ilble

Anl)e the PC3R dt( Poer congestion !inl) occurs in the ti!e seg!ent o* +to < !inutes6 nd !ore thn /0 o* the $oer-congestion subscribers undergo cellreselection o'er di**erent subs)ste!s(

F&uggestionsH

#isble the u$lin; d!ission lgorith! or OLC lgorith!( I* both the u$lin;

d!ission lgorith! nd OLC lgorith! re enbled6 the ccess success rtedecreses se'erel)( I* the lgorith!s re disbled6 )ou cn 'oid the RRCconnection *ilure cused b) $oer congestion(

Anl)e the cuse o* cell reestblish!ent6 nd tr) to loer the occurrence*re=uenc) o* cell reestblish!ent in the netor;(

The RT9P increses bnor!ll) becuse the e=ui$!ent is bnor!l

F:eturesH

9hen tr**ic is not high6 the RT9P o* one or to sites increses stbl) b) !orethn 10 dB( The s)!$to! lsts *or !ore thn /0 !inutes(

A*ter the RT9P increses6 the RT9P 'ries gentl) nd hs no re!r;ble*luctution(

The !ini!u! RT9P >"&(MinRT9P? l)s re!ins t high le'el(

+01.--2 3uei Con*identil Pge +/ o* 1.4


27/134


FMethod o* nl)sisH

Anl)e the $er*or!nce dt( I* cells re congested6 !esure the MinRT9P 'lueo* the cells(

7uer) the s)ste! lr!s nd chec; hether there eist n) bord-relted lr!s(

Process the lr!s *irst( Trce the RT9P nd nu!ber o* subscribers o* the cells in rel ti!e(

I* the rel-ti!e trcing result shos tht the RT9P o* the cells is bnor!lcontinuousl) nd the nu!ber o* subscribers is s!ll6 )ou cn scertin the cuse onsite(

I* ll the $receding cuses re ecluded6 )ou cn sus$ect tht the $roble! is cused b) the e=ui$!ent( 5ou cn collect the relted in*or!tion nd sub!it thein*or!tion to the Mintennce #e$rt!ent(

F&uggestionsH

Collect the relted in*or!tion ccording to the *olloing chec;list6 nd s; the R# $ersonnel to *urther nl)e the $roble!(

1? TCP

The TCP increses *or the *olloing resonsH

3igh tr**ic

Other cuses

:or donlin; $oer congestion >the TCP increses?6 nl)e the $er*or!nce dt6 Dudge hether the $roble! is relted to the rise in tr**ic6 nd then $ro$ose$$ro$rite solution suggestions(

The co!!ercil netor;s do not encounter the scenrio here RRC d!ission *ilure is cused b)the o'erhigh TCP( Currentl)6 the troubleshooting e$erience in the s$ect is not enough( The reltedcontents ill be dded subse=uentl)(

*.RRC.Re4.8.C+.Cong> *.RRC.Re4.&.C+.Cong

The RNC RRM !;es d!ission lgorith! decision( The RNC RRM cn *ind thed!ission denil becuse o* the insu**icienc) o* u$lin; or donlin; CE resources6 orthe nu!ber o* RRC connection reDections becuse the NodeB returns CE Congestionhen the RNC deli'ers the RL&ET%P !essge( :or the RL:il becuse the NodeBreturns CE Congestion6 the RAN10 or erlier 'ersions h'e the *olloing de*ectsH

The CE c$bilit) o* the NodeB is constrined b) both the license con*igurtion ndhrdre s$eci*ictions( At $resent6 the NodeB re$ortsI%BINTER:ACECELL&5NCNOT&%PP ndI%BINTER:ACECELL&5NCA#8NOT&%PP to the RNC i* the CE Licenses

re not enough( The RNC dds the to cuse 'lues to the "&(RRC(ReD(%L(CE(Congcounter nd "&(RRC(ReD(#L(CE(Cong counter res$ecti'el)( 3oe'er6 the NodeBre$orts RA#IORE&O%RCE&NOTA"AILABLE to the RNC i* the ctul hrdrec$bilit) >CE resource? o* the NodeB is not enough( Then6 the RNC dds the cuse'lue to the "&(RRC(ReD(RL(:il counter rther thn to the corres$onding CEcongestion counter(

5ou cn obser'e the CE c$bilit) re$orted b) the NodeB through the Iub NBAPsignling(

+01.--2 3uei Con*identil Pge +2 o* 1.4


28/134


3igure ? Cell udit !essge

The CE license con*igurtion o* the NodeB should be loer thn the hrdre c$bilit) o* the NodeB( 9h) is the hrdre c$bilit) not enough hen the license c$bilit) is not congested Thereson is s *ollosH In the RAN10 or erlier 'ersions6 the NodeB re$orts the CE c$bilit) to the

RNC ccording to the stndrd o* con*igured licenses × 110 regrdless o* the hrdre c$bilit)(

There*ore6 there eists the scenrio here the con*igured licenses eceed the hrdre c$bilit)6hich is not resonble( The subse=uent 'ersions ill !;e the *olloing i!$ro'e!entsH

The *olloing i!$ro'e!ents re !de on the NodeBH

I* the CE Licenses re not enough6 the NodeB re$orts the *olloing cuse through the Iub inter*ceH

CELL&5NNOT&%PPH The u$lin; CE licenses re not enough(

CELL&5NA#8NOT&%PPH The donlin; CE licenses re not enough(

The to cuse 'lues ;ee$ the design o* the RAN10 'ersion(

I* the hrdre CE c$bilit) is not enough6 the NodeB re$orts the *olloing cuse through the Iubinter*ceH

%LRA#IORE&O%RCE&NOTA"AILABLEH The u$lin; hrdre CE c$bilit) is not enough6the u$lin; logicl resources >*or e!$le6 :PI# nd CcTrchI#? re not enough6 nd u$lin;subscribers re llocted(

#LRA#IORE&O%RCE&NOTA"AILABLE: The donlin; hrdre CE c$bilit) is notenough6 nd the donlin; logicl resources >*or e!$le6 :PI# nd CcTrchI#? re not enough(

The *olloing i!$ro'e!ents re !de on the RNCH

Both CELL&5NNOT&%PP nd %LRA#IORE&O%RCE&NOTA"AILABLE re$orted b) the NodeB re considered s u$lin; CE insu**icienc)(

Both CELL&5NA#8NOT&%PP nd #LRA#IORE&O%RCE&NOTA"AILABLE re$orted b) the NodeB re considered s donlin; CE insu**icienc)(

In ddition6 the ccess *ilure becuse o* the $receding *our cuses is ecluded *ro! the"&(RRC(ReD(RL(:il counter(

It is i!$robble tht the NodeB re$orts RA#IORE&O%RCE&NOTA"AILABLE *or theinsu**icienc) o* other resources >*or e!$le6 hrdre resource?( There*ore6 )ou cn bsicll)deter!ine tht the $roble! is cused b) the insu**icienc) o* CEs(

Becuse o* the $receding de*ects6 the nu!ber o* CE congestions is not ccurte( 9hennl)ing "&(RRC(ReD(%L(CE(Cong nd "&(RRC(ReD(#L(CE(Cong6 )ou lso need toconsider "&(RRC(ReD(RL(:il(

The co!!on cuses o* CE congestion re s *ollosH

+01.--2 3uei Con*identil Pge + o* 1.4


29/134


3igh tr**ic

The residul CEs !intined b) the NodeB re not consistent ith those!intined b) the RNC(

In cse o* CE congestion6 nl)e the to$ N congested cells through the

$er*or!nce dt6 Dudge the cuses o* CE congestion6 nd $ro$ose $$ro$ritesolution suggestions(

Table 1 Indictor o* cell CE congestion

D9 :9

Tr**ic C&Erlng

"&(AMR(Ctrl(#L1+(+ "&(AMR(Ctrl(%L1+(+

"&(RB(#LCon'C&(/4 "&(RB(%LCon'C&(/4

P&

Erlng

"&(RB(#LInterP&( "&(RB(%LInterP&(

"&(RB(#LInterP&(1/ "&(RB(%LInterP&(1/"&(RB(#LInterP&(.+ "&(RB(%LInterP&(.+

"&(RB(#LInterP&(/4 "&(RB(%LInterP&(/4

"&(RB(#LInterP&(1+ "&(RB(%LInterP&(1+

"&(RB(#LInterP&(144 "&(RB(%LInterP&(144

"&(RB(#LInterP&(+


30/134


D9 :9

"&(RAB(AttEstbP&(Cell "&(RAB(AttEstbP&(Cell

"&(3PA(RAB(AttEstb "&(3&%PA(RAB(AttEstb

Congestion "&(LCC(L#R(Nu!(#LCE "&(LCC(L#R(Nu!(%LCE

"&(LCC(L#R(Ti!e(#LCE "&(LCC(L#R(Ti!e(%LCE

"&(RAB(:ilEstPs(#LCE(Cong "&(RAB(:ilEstPs(%LCE(Cong

"&(RAB(:ilEstCs(#LCE(Cong "&(RAB(:ilEstCs(%LCE(Cong

"&(RRC(ReD(#L(CE(Cong "&(RRC(ReD(%L(CE(Cong

"&(RRC(ReD(RL(:il "&(RRC(ReD(RL(:il

CE %sed Nu!ber

"&(LC(#LCredit%sed(CELL "&(LC(%LCredit%sed(CELL

"&(LC(#LCredit%sed(CELL(M

"&(LC(%LCredit%sed(CELL(M

"&(LC(#LCredit%sed(CELL(Min

"&(LC(%LCredit%sed(CELL(Min

CE %sed Nu!ber

NodeBCount

"&(#LCE(Men(&hred "&(%LCE(Men(&hred

"&(#LCE(M(&hred "&(%LCE(M(&hred

Tble + lists the nu!ber o* CEs consu!ed b) di**erent ser'icesH

Table # Nu!ber o* CEs consu!ed b) the #C3 ser'ice

Direction

SpreaingFactor

2umber ofC0sConsume

CorresponingCreitsConsume

T)picalTrafficClass

#L +


31/134


Direction

SpreaingFactor

2umber ofC0sConsume

CorresponingCreitsConsume

T)picalTrafficClass

#L .+ + + /4 ;bit@s P&

%L 1/ . /

#L 1/ 4 4 1+ ;bit@s P&

%L < 10

#L .4 ;bit@s P&

%L 4 10 +0

Table $ Nu!ber o* CEs consu!ed b) the 3&%PA ser'ice

Direction SpreaingFactor

5S:PAPhase $

5S:PA Phase " T)picalTrafficClass

%L /4 111 1 -

%L .+ 111(< 1(< /4 ;bit@s

%L 1/ 11. . 1+ ;bit@s

%L 11< < +thenu!ber o* consu!ed CEs !esured b) the NodeB?6 nd chec; hether the) rech

the u$$er li!it o* CE c$bilit) >u$lin;H license×110-%l3oCeRes'&*J donlin;H

+01.--2 3uei Con*identil Pge .1 o* 1.4


32/134


license×110-#l3oCeCodeRes'&*?( %l3oCeRes'&* nd #l3oCeCodeRes'&* re

con*igured b) the RNC MML(

Clculte the nu!ber o* consu!ed CEs e=ui'lentl) through the nu!ber o* RBs o*ech cell under the NodeB6 nd chec; hether the) rech the u$$er li!it o* CE

c$bilit)( Chec; hether CE congestion dis$$ers grdull) hile tr**ic >CE %sed

Nu!ber6 RBs6 nd 3&PA subscribers? decreses grdull)(

I* ll the $receding conditions re !et6 )ou cn bsicll) deter!ine tht high tr**iccuses CE congestion(

F&uggestionsH

5ou cn t;e the *olloing !esuresH

I* the CE-bsed L#R *unction is not enbled in the eisting netor;6 )ou cnconsider enbling the CE L#R lgorith! to relie'e the i!$cts o* CE congestion(

I* CE-bsed L#R *unction is enbled in the eisting netor;6 )ou cn chec;hether "&(LCC(L#R(Nu!(#LCE6 "&(LCC(L#R(Nu!(%LCE6"&(LCC(L#R(Ti!e(#LCE6 nd "&(LCC(L#R(Ti!e(%LCE re 'lidted throughthe *olloing $er*or!nce dt(

I* the $receding indictors do not !esure the count nd durtion in L#R stte6 itindictes tht the e=ui$!ent does not enter the L#R stte( The $ossible cuses res *ollosH

A? The NodeB re$orts the CE c$bilit) ccording to the stndrd o* con*igured

licenses × 110( I* the con*igured licenses × 110 − L#R threshold

>%lLdrCredit&*ResThd@#lLdrCredit&*ResThd? eceeds the hrdre c$bilit)o* the NodeB6 the e=ui$!ent cn ne'er enter the L#R stte( The RNC triggersthe L#R *unction b) Dudging hether the di**erence beteen the CE c$bilit)

re$orted b) the NodeB >con*igured licenses × 110? nd the nu!ber o*

currentl) consu!ed CEs reches the L#R threshold(

B? The *unctions o* the $roduct re de*ecti'e(

9hen the 3&%PA *unction is enbled in the eisting netor;6 )ou cn enble thed)n!ic CE *unction o* the NodeB or 3&%PA #CCC *unction i* u$lin; CEcongestion is se'ere( Note the *olloing $ointsH

A? I* )ou enble 3&%PA #CCC6 )ou !ust con*igure 3&%PA d!ission to be bsed on MBR ccess(

B? I* )ou enble d)n!ic CEs o* the NodeB6 )ou !ust disble 3&%PA #CCC ndcon*igure 3&%PA d!ission to be bsed on GBR ccess(

E$nd the c$cit)6 $urchse CEs6 or dd TRs(

CE congestion is cused becuse the residul CEs !intined b) the NodeB re notconsistent ith those !intined b) the RNC(

F:eturesH

The CE %sed Nu!ber is not high enough to rech the license c$bilit)(

CE d!ission denil occurs e'en i* tr**ic is not high(

FMethod o* nl)sisH

Anl)e the $er*or!nce dt o* the congested cells6 *ind the NodeB to hich thecongested cells belong6 nd obtin the $er*or!nce dt o* ll the cells o* the NodeB(

7uer) the totl nu!ber o* CEs consu!ed b) ll cells under the NodeB nd the CE

+01.--2 3uei Con*identil Pge .+ o* 1.4


33/134


Count !esured b) the NodeB6 nd chec; hether the) re belo the u$$er li!ito* CEs(

Clculte the nu!ber o* consu!ed CEs e=ui'lentl) through the nu!ber o* RBs o*ech cell under the NodeB >=uer) the nu!ber o* RBs o* ech cell through the

$er*or!nce dt6 nd then clculte the nu!ber o* consu!ed CEs ccording to theCE consu!$tion rules?6 nd chec; hether it is belo the u$$er li!it o* CEs(

I* ll the $receding conditions re !et6 )ou cn bsicll) deter!ine tht the $roble! is cused becuse the residul CEs !intined b) the NodeB re notconsistent ith those !intined b) the RNC >the *or!er is less thn the ltter?(The $ossible cuse is NodeB CE le;ge(

F&uggestionsH

In cse o* NodeB CE le;ge6 )ou need to contct the Mintennce #e$rt!ent *or*urther nl)sis(

*.RRC.Re4.R.3ail6

#uring RRC connection setu$6 the NodeB Dudges setu$ *ilure( The $ossible cuse is

tht the internl resources >hrdre CE c$bilit) nd logicl resource? o* the NodeBre not enough(

The hrdre CE c$bilit) is not enough

F:eturesH

The CE %sed Nu!ber is lrge6 nd $$roches to the u$$er li!it o* CEs(

In $e; hours6 RL ReDect occurs !ore *re=uentl)(

RL ReDect beco!es nor!l grdull) hile tr**ic decreses(

FMethod o* nl)sisH

Anl)e the $er*or!nce dt o* the RL ReDect cells6 *ind the NodeB to hich theRL ReDect cells belong6 nd obtin the $er*or!nce dt o* ll the cells o* the

NodeB( 7uer) the totl nu!ber o* CEs consu!ed b) ll cells under the NodeB nd the CE

Count !esured b) the NodeB6 nd chec; hether the) $$roch to the u$$er li!ito* the hrdre CE c$bilit) o* the NodeB(

I* ll the $receding conditions re !et6 )ou cn bsicll) deter!ine tht the $roble! is cused b) the constrint o* hrdre s$eci*ictions o* the NodeB( The NodeB re$orts the CE c$bilit) ccording to the stndrd o* the con*igured

licenses × 110 regrdless o* the hrdre s$eci*ictions( I* License×110 −

%l3oCeRes'&* or license×110 − #l3oCeCodeRes'&* eceeds the hrdre

c$bilit) o* the NodeB6 the $roble! occurs(

F&uggestionsH

In the subse=uent R11 'ersion6 the hrdre s$eci*ictions re t;en into ccounthen the NodeB re$orts the CE c$bilit)( Then6 the $roble! does not occur(

To 'oid the $roble!6 )ou cn decrese the nu!ber o* con*igured licenses( As result6 the i!$cts o* congestion cn be relie'ed through the L#R *unction(

Other internl resources o* the NodeB re not enough

The $robbilit) o* occurrence is lo( :eed bc; the occurrence >i* 'ilble? to theR# de$rt!ent *or nl)sis(

*.RRC.Re4.Code.Cong

RRC setu$ reDection is !inl) cused b) the insu**icienc) o* code resources( In high-tr**ic scenrio >*or e!$le6 indoor !icro-cell co'erge?6 code resources !) be notenough( 5ou need to e$nd its c$cit)( 7uer) the *olloing count 'lues nddeter!ine hether the $roble! is cused b) high tr**ic(

+01.--2 3uei Con*identil Pge .. o* 1.4


34/134


Table % Anl)sis o* cell code congestion indictors

D9 Traffic CS 0rlang VS!A-R!Ctrl!D9$"!"

"&(RB(#LCon'C&(/4

P& Erlng "&(RB(#LInterP&(

"&(RB(#LInterP&(1/

"&(RB(#LInterP&(.+

"&(RB(#LInterP&(/4

"&(RB(#LInterP&(1+

"&(RB(#LInterP&(144

"&(RB(#LInterP&(+


35/134


resources(

Table ; Anl)sis o* trns!ission congestion indictors

D9 :9

Congestion

"&(RRC(ReD(#LI%BBndCong "&(RRC(ReD(%LI%BBndCong

"&(RAB(:ilEstb(C&(#LI%BBnd(Cong "&(RAB(:ilEstb(C&(%LI%BBnd(Cong

"&(RAB(:ilEstb(P&(#LI%BBnd(Cong "&(RAB(:ilEstb(P&(%LI%BBnd(Cong

Iub bndidth utilit)

rtio

ATM "&(AAL+PAT3(P"CLA5ER(TB5TE& "&(AAL+PAT3(P"CLA5ER(RB5TE&

"&(7AAL+(Alloced:d(AAL+BitRte "&(7AAL+(AllocedBd(AAL+BitRte

"&(7AAL+(AllocedM:d(AAL+BitRte("lue

"&(7AAL+(AllocedMBd(AAL+BitRte("lue

IP "&(IPPAT3(IPLA5ER(TB5TE& "&(IPPAT3(IPLA5ER(RB5TE&

O&(ANI(IP(Alloced:d O&(ANI(IP(AllocedBd

The *olloing section describes se'erl i!$ortnt conce$ts bout Iub d!issionH

Iub bndidth d!ission is bsed on the llocted bndidth regrdless o* thectul tr**ic(

In the 'ersions lter thn the RAN106 the bndidth is llocted *or the P& ser'ice

ccording to GBR × Acti'e :ctor(

The RAN10 $ro'ides the corres$onding count indictors *or both ctul tr**ic ndllocted bndidth o* the Iub inter*ce6 but the) need to be con'erted( Thed!ission is bsed on the P"C tr**ic consu!ed b) the user( All tr**ic needs to becon'erted to the P"C l)er(

The *olloing section describes se'erl i!$ortnt count indictorsH

The *olloing section describes the clcultion o* ctul tr**ic on the Iub inter*ce

b) t;ing the donlin; s n e!$leHATM (;b$s?H &%M ("&(AAL+PAT3(P"CLA5ER(TB5TE&) × @ ./00 @ 1000

MeningH Add u$ the tr**ic o* ll AAL+PAT3s o* the Iub6 nd h'e the su!di'ided b) the ti!e6 thus obtining the ctul tr**ic >;b$s?

The tr**ic !esure!ent is $er*or!ed in the P"C l)er6 so it does not need to becon'erted(

IP (;b$s?H &%M("&(IPPAT3(IPLA5ER(TB5TE&?× @ ./00 @ 1000

MeningH Add u$ the tr**ic o* ll IPPAT3s o* the Iub6 nd h'e the su! di'ided b)the ti!e6 thus obtining the ctul tr**ic >;b$s?

The tr**ic !esure!ent is $er*or!ed in the IP l)er6 so it does not need to be

con'erted(

+01.--2 3uei Con*identil Pge .< o* 1.4


36/134


B) t;ing the donlin; s n e!$le6 the *olloing section describes bndidthlloction o* the Iub inter*ceH

ATM (;b$s?H "&(7AAL+(Alloced:d(AAL+BitRte × ecluding the $rt o* cell reselection o'er di**erentsubs)ste!s?(


+01.--2 3uei Con*identil Pge ./ o* 1.4


37/134


The %E sends the RRC &etu$ Co!$lete !essge6 but the RNC does not recei'e the!essge(

It is di**icult to Dudge hether the %E recei'es the RRC Connection &etu$ !essgeonl) through the C3R log or $er*or!nce dt( To ttin de*inite result6 )ou !ust

conduct dri'e test( O* course6 )ou cn ttin the $reli!inr) nl)sis result throughthe C3R log or $er*or!nce dt be*ore conducting the dri'e test(

The *olloing section describes the Dudg!ent !ethods nd solution suggestions indi**erent scenriosH

%u Nore$l) is cused b) cell reselection o'er di**erent subs)ste!s

F:eturesH

In the PC3R log6 )ou cn *ind tht there eists the ccess success log nerb) the $oint o* ccess *ilure ti!e o* the s!e subscriber(

The nl)sis dt o* Ger!n)s O+ nd &$ins "#: shos tht the $rt ccounts*or bout 40 o* totl RRC ccess *ilure count(

FMethod o* nl)sisH

As instructed in the *olloing o$ertion guide6 )ou cn directl) obtin the count nd $ro$ortion o* cell reselections o'er di**erent subs)ste!s( The o$ertion re!ins )et to be ttched here( The o$ertion guide hs been $re$red ell6 but its sie is lrge(

Alternti'el)6 nl)e the $roble! s *ollosH

:or RRC ccess *ilure recorded in the PC3R log6 )ou cn deter!ine tht the $roble! is cused b) cell reselection o'er di**erent subs)ste!s under the *olloingcircu!stncesH

The lst ccess o* the corres$onding subscriber is nor!l

The RL Relese ti!e is lter thn the ti!e o* the current ccess *ilure(

Alternti'el)6

The net ccess o* the corres$onding subscriber is nor!l6

The di**erence beteen the ti!e o* the net nor!l ccess nd the ti!e o* the

current ccess *ilure is less thn >N.001? × T.006

The cell o* ccess *ilure nd the cell o* ccess success re not in the s!e subs)ste!(

F&uggestionsH

In the RNC RAN11 0


38/134


&etu$ Co!$lete !essge(

The %E sends the RRC &etu$ Co!$lete !essge6 but the RNC does not recei'e the!essge(

:or detils bout the Dudg!ent !ethods nd solution suggestions6 see the *olloing

section( 3oe'er6 the !ost direct !ethod is to conduct dri'e test nd !;esignling nl)sis( There*ore6 the F*etures in the *olloing section de*ine se'erlco!!on Dudg!ent criteri6 hich re not bsolute(

The RNC recei'es the RRC Connection Re=uest !essge sent b) the %E nd deli'ersthe RRC Connection &etu$ !essge6 but the RNC does not recei'e the !essge>ecluding the $rt o* cell reselection o'er di**erent subs)ste!s?(

F:eturesH

Through the IO&6 )ou cn *ind tht the RRC Connection &etu$ !essge is sentre$etedl) on the %% inter*ce >bsed on the N.00?(

The $ossible cuses re s *ollosH

The :AC3 co'erge is $oor(

The cell selection nd reselection $r!eters re not set resonbl)(

The e=ui$!ent is bnor!l or $c;ets re lost during the trns!ission(

FMethod o* nl)sisH

Anl)e the EC@N0 in*or!tion re$orted b) the %E in the RRC ConnectionRe=uest !essge >)ou cn obtin the EC@N0 in*or!tion through the PC3R log?( I*

the EC@N0 'lue is loer thn −1+ dB >the de*ult 'lue?6 it indictes tht the

$roble! is cused b) $oor co'erge(

I* the !onitoring set in the RRC Connection Re=uest !essge contins better cells6it indictes tht the $roble! !) be cused b) cell reselection(

I* the EC@N0 re$orted b) the %E in the RRC Connection Re=uest !essge is higher

thn −2 dB6 it indictes tht the e=ui$!ent is bnor!l or $c;ets re lost duringthe trns!ission >hich seldo! occurs?(

F&uggestionsH

I* the $roble! is cused b) $oor co'erge6 )ou cn t;e $$ro$rite !esures toenhnce the co'erge6 *or e!$le6 dd sites to *ill the blind s$ots nd dDust theengineering $r!eters( I* )ou cnnot enhnce the co'erge6 )ou cn rise theRAC3 $oer $$ro$ritel)( #uring the dDust!ent6 )ou need to consider thePCPIC3 EC@Io co'erge o* the eisting netor;( :or e!$le6 i* the $ilot Ec@Io inthe co'erge re is higher thn -1+ dB *ter netor; o$ti!ition6 )ou cn ensurethe ccess success rte o* the %E t the .G idle stte s long s the !tching $ro$ortion o* the $oer o* $ublic chnnels is con*igured to ensure tht the Ec@Io ishigher thn -1+ dB( I* the %E is reselected to the G&M hen the $ilot Ec@Io isloer thn -1+ dB6 )ou cn ensure the RRC setu$ success rte o* the %E in e;-signl co'erge re *ter cell reselection o'er di**erent subs)ste!s s long s the!tching $ro$ortion o* the $oer o* $ublic chnnels is con*igured to ensure thtthe Ec@Io is higher thn -14 dB(

I* the cell selection nd reselection $r!eters re not set resonbl)6 )ou cn!odi*) such $r!eters to rise the s$eed o* cell selection nd reselection(

I* the EC@N0 'lue is idel but the RRC Connection &etu$ !essge is not recei'ed6*eed bc; the s)!$to! to the R# de$rt!ent(

+01.--2 3uei Con*identil Pge . o* 1.4


39/134


The RRC CONNECTION &ET%P !essge is crried b) the :AC3( The %E sends the RRCCONNECTION RE7%E&T !essge through the RAC3 *ter the $re!ble o* the PRAC3 is recei'edt the %TRAN side nd the $oer o* the $re!ble is used s the bench!r;( The trns!it $oer o*the $re!ble cn increse continuousl) until the %E recei'es res$onse >restricted b) the !i!u!

count o* $re!ble retrns!issions?( In so!e $oor-co'erge res6 the i!blnce !) occur beteenthe RAC3 co'erge nd :AC3 co'erge( As result6 the RRC setu$ re=uest sent b) the %E cn berecei'ed t the %TRAN side6 but the %E cnnot recei'e the RRC Connection &etu$ sent b) the RNC(


F:eturesH

Through the IO&6 )ou cn *ind tht the RRC Connection &etu$ !essge is sentin*re=uentl) on the %% inter*ce nd tht the sending count does not rech thecount s s$eci*ied b) the N.00(

I* RRC ccess is bsed on the #C36 )ou do not *ind the RL Restore !essge on theIub inter*ce(

I* RRC ccess is bsed on the #C36 )ou cn *ind tht the trns!it $oer o* the %Eis lo(

I* both *eture 1 nd *eture + >or *eture .? re 'ilble6 it is $robble tht the %Erecei'es the RRC Connection &etu$ !essge but does not send the RRC &etu$Co!$lete !essge(

I* RRC ccess is bsed on the CC3 nd *eture 1 $$ers6 it is $robble tht the %Erecei'es the RRC Connection &etu$ !essge but does not send the RRC &etu$Co!$lete !essge or tht the %E sends the RRC &etu$ Co!$lete !essge but theRNC does not recei'e the !essge(

The $ossible cuses re s *ollosH

#onlin; s)nchronition *ils(

The %E is bnor!l(I* the RRC &etu$ Co!$lete !essge is sent through the #C36 the %E does notsend the RRC &etu$ Co!$lete signling on the u$lin; unless the donlin; iss)nchronied in ccordnce ith the descri$tion o* &)nchronition $rocedure A in $rocedure A >The %E shll not trns!it on u$lin; until higher l)ers consider thedonlin; $h)sicl chnnel estblished?(

&ection +Ec@No?c$ich re*ers to the

co'erge sttus t the %E loction(

In ddition to b) guess6 )ou cn lso Dudge hether the donlin; is s)nchronied

b) the TPC recei'ed b) the %E nd trns!it $oer o* the %E( &ection +


40/134


the *olloing descri$tionH %TRAN shll strt the trns!ission o* the donlin;#PCC3 nd !) strt the trns!ission o* #P#C3 i* n) dt is to be trns!itted(The initil donlin; #PCC3 trns!it $oer is set b) higher l)ers( #onlin;TPC co!!nds re generted s described in


41/134


cn chec; the "&(%LBler(P&Nrt(Rch nd "&(MenRT9P 'lues( I*"&(%LBler(P&Nrt(Rch or "&(MenRT9P is high6 it is $ossible tht the RT9Pinter*erence on the u$lin; cuses the bit errors on the RAC3 nd thus the RNCcnnot recei'e the RRC &etu$ Co!$lete !essge correctl)(

I* RRC ccess is bsed on the #C36 it is $ossible tht the u$lin; is nots)nchronied( 5ou cn chec; hether the RL Restore Indiction is 'ilble on theIub inter*ce( I* not6 it is $ossible tht the initil trns!it $oer o* the dedictedu$lin; chnnel is relti'el) lo(

I* the RL Restore !essge is 'ilble but the RNC cnnot recei'e the RRC &etu$Co!$lete !essge correctl)6 it is $ossible tht $c;ets re lost during thetrns!ission or the e=ui$!ent is bnor!l( 5ou need to *eed bc; the s)!$to! tothe R# de$rt!ent(

F&uggestionsH

I* the RAC3 hs bit errors nd the RT9P is etre!el) high6 eli!inte the u$lin;inter*erence ccording to the RT9P Chec; List(

I* the $roble! is cused b) the *ilure o* u$lin; s)nchronition6 the trns!it $oer o* the %E increses b) controlling the initil u$lin; $oer6 hich occursi!$robbl)( The occurrence o* such $roble! cn rise the Constnt "lue o* thededicted chnnel6 thus rising the initil trns!it $oer o* the u$lin; #PCC3 o*the %E( In ddition6 the $roble! is relted to the setting o* the initil trget 'lue o*the u$lin; &IR6 hich hs gret i!$ct on the initil u$lin; s)nchronition t theti!e o* initil lin; estblish!ent( I* the $r!eter is set to n etre!el) lrge 'lue6o'erhigh u$lin; inter*erence !) be cused to the lin; initill) estblished *or the%E( I* the $r!eter is set to n etre!el) s!ll 'lue6 the ti!e o* u$lin;s)nchronition is $rolonged nd e'en initil s)nchronition *ils( The $r!eteris n RNC-le'el $r!eter nd hs gret i!$ct on netor; $er*or!nce(There*ore6 )ou need to !odi*) the $r!eter ith cution(

The RRC CONNECTION &ET%P COMPLETE !essge is sent through the #PC36 nd the %Eclcultes the initil $oer o* the u$lin; #PCC3 ccording to the recei'edIEU#PCC3Poero**setU nd !esured CPIC3R&CP 'lue(

#PCC3Initil$oer #PCC3Poero**set - CPIC3R&CP

#PCC3Poero**set is e=ul to Pri!r) CPIC3 #L T Poer %L Inter*erence Constnt "lue(The Constnt "lue $r!eter cn be con*igured on the bc;ground( I* the Constnt "lue $r!eteris set to n etre!el) lo 'lue6 it is $ossible tht the trns!it $oer o* the %E is not enough henthe %E sends the RRC CONNECTION &ET%P COMPLETE !essge( 3oe'er6 the $roble! usull)does not occur under the current de*ult $r!eter setting >in the "1.C0.B1


42/134


& RA% Access Success Rate>A-R1PS1VP15SPA?

&!$ 6PI DefinitionRAB setu$ success rte >RAB setu$ success count?@>RAB tte!$t count?

VS.RA!.SuccEstabCS.A"R.Cell.Rate # $VS.RA!.SuccEstab.A"R% & $VS.RA!.AttEstab.A"R%

VS.RA!.SuccEstabPS.Cell.Rate # ' $VS.RA!.SuccEstabPS.Con(% ) $VS.RA!.SuccEstabPS.Str% )

$VS.RA!.SuccEstabPS.Inter% ) $VS.RA!.SuccEstabPS.!*+% ,&' $VS.RA!.AttEstabPS.Con(% )

$VS.RA!.AttEstabPS.Str% ) $VS.RA!.AttEstabPS.Inter% ) $VS.RA!.AttEstabPS.!*+% ,

&!" Influence FactorsThe $rocess o* RAB connection setu$ includes the *olloing ste$sH

1( The CN sends the RAB A&&IGNMENT RE7%E&T !essge to the RNC through theI% inter*ce(

+( A*ter recei'ing the RAB A&&IGNMENT RE7%E&T !essge6 the RNC deter!inestht it needs to estblish ne RAB( The RNC *irst $er*or!s resource d!ission(

.( I* resource d!ission *ils6 the RNC returns the RAB A&&IGNMENT RE&PON&E!essge to the CN(

4( I* resource d!ission is success*ul6 the RNC sends the RA#IO BEARER &ET%P!essge to the %E( I* the rdio berer setu$ *ils6 the %E returns the RA#IOBEARER &ET%P :AIL%RE !essge to the RNC( I* recei'ing the RA#IO BEARER&ET%P :AIL%RE !essge or no res$onse6 the RNC returns the RAB A&&IGNMENTRE&PON&E !essge to the CN(

RAB setu$ *ils under the *olloing scenriosH

The RNC recei'es the RAB A&&IGNMENT RE7%E&T !essge6 nd the d!issiono* code6 CE or $oer resource *ils(

The RNC recei'es the RAB A&&IGNMENT RE7%E&T !essge( The d!ission o*s)ste! resources >*or e!$le6 the !e!or)? *ils(

A*ter recei'ing the RAB A&&IGNMENT RE7%E&T !essge6 the RNC sends the

+01.--2 3uei Con*identil Pge 4+ o* 1.4


43/134


RA#IO BEARER &ET%P !essge to the %E6 but does not recei'e the RA#IOBEARER &ET%P COMPLETE !essge sent b) the %E(

A*ter recei'ing the RAB A&&IGNMENT RE7%E&T !essge6 the RNC sends theRA#IO BEARER &ET%P !essge to the %E nd recei'es the RA#IO BEARER

&ET%P :AIL%RE !essge sent b) the %E(%sull)6 RAB setu$ *ilure is cused b) the *olloing *ctorsH

Resource congestion

#onlin; co'erge

#onlin; s)nchronition

%$lin; s)nchronition


RAB $r!eters unsu$$orted

Resource congestion includes $oer resource congestion6 CE resource congestion6code resource congestion6 nd trns!ission resource congestion( :or the $roble!

cused resource congestion6 )ou need to *irst chec; the ctul utilition o* resources6nd nl)e the correctness o* congestion threshold nd con*igurtions(

The $roble!s relted to donlin; co'erge nd donlin; s)nchronition !inl)occur hen RAB setu$ *ils under the #R# scenrios(

&!& Anal)sis Process1. &iscussing the Proble', Ascertaining the Proble' (ac)ground and Product

*ersion, and +cluding the I'-acts o Known (ugs

As; the *ield $ersonnel to *eed bc; the relted in*or!tion6 obtin the ;non bug

in*or!tion bout the corres$onding 'ersion >)ou cn in=uire o* the relted contct $erson o* the $roduct or in=uire bout the in*or!tion bout si!ilr $roble!s o* othersites?6 nd deter!ine hether the $roble! is ;non $roble!(

#eter!ine the ti!e t hich the RAB setu$ success rte is chnged6 nl)e hetherthe $roble! is cused b) netor; dDust!ent6 nd *ocus on the i!$cts o* netor;dDust!ent(

#. Narrowing the Anal"sis co-e, Anal"/ing 2hether the Proble' 5ccurs in

5nl" 5ne or Two Cells, and Anal"/ing 2hether the To- N Cells are

Re-resentati!e

Anl)e the chnge o* the cuses o* RAB ccess *ilure through the $er*or!ncecounters on the RNC6 nd nl)e hich *ctor cuses the decline o* RAB setu$

success rte(

Table 1 Indictors o* C& RAB setu$ *ilure

-easurementItem

9evel $

SubItems

9evel "

SubItems

9evel &

Sub Items

9evel '

"&(RAB(:ilEstCs(Poer(Cong

"&(RAB(:ilEstCs(Code(Cong

"&(RAB(:ilEstb(C&(#LI%BBnd(Cong

+01.--2 3uei Con*identil Pge 4. o* 1.4


44/134


-easurementItem

9evel $

SubItems

9evel "

SubItems

9evel &

Sub Items

9evel '

" & ( R

A B ( : i l E s t b C & ( R

N

L

" & ( R

A B ( : i l E s t C & ( % n s $

" & ( R

A B ( : i l E s t b C & ( C o n

g

"&(RAB(:ilEstb(C&(%LI%BBnd(Cong

"&(RAB(:ilEstCs(%LCE(Cong

"&(RAB(:ilEstCs(#LCE(Cong

"&(RAB(:ilEstbC&(%ns$(Other

"&(RAB(:ilEstC&(RIP:il

"&(RAB(:ilEstC&(Relo

"&(RAB(:ilEstbC&(RNL(Other

"&(RAB(:ilEstbC&(TNL

"&(RAB(:ilEstbC&(other(CELL

Table # Indictors o* P& RAB setu$ *ilure

-easurement

Item 9evel $

Sub Items 9evel

"

Sub Items 9evel &

" & ( R

A B ( : i l E s t P & ( R

N L

" & ( R

A B ( : i l E s t P & ( % n s $

"&(RAB(:ilEstPs(Poer(Cong

"&(RAB(:ilEstPs(Code(Cong

"&(RAB(:ilEstb(P&(#LI%BBnd(Cong

"&(RAB(:ilEstb(P&(%LI%BBnd(Cong

"&(RAB(:ilEstPs(%LCE(Cong

"&(RAB(:ilEstPs(#LCE(Cong

"&(RAB(:ilEstbP&(%ns$(Other

"&(RAB(:ilEstP&(RIP:il

"&(RAB(:ilEstP&(Pr

"&(RAB(:ilEstP&(Relo

"&(RAB(:lEstP&(RNL(Other

"&(RAB(:ilEstP&(TNL

"&(RAB(:ilEstP&(NResA'il



45/134


"&(RAB(:ilEstbP&(Other(Cell

$. Anal"/ing the Causes o RA( 3ailure &ee-l"

*.RA(.3ail+stCs.Power.Cong >*.RA(.3ail+stPs.Power.Cong

The RNC RRM $er*or!s $oer d!ission lgorith! decision( I* *inding the decisionon u$lin; or donlin; d!ission denil6 the RNC RRM initites RAB setu$ reDection(

Poer congestion occurs hen the $oer d!ission sitch is enbled >b) running theA&& C+AG52ITCH6 co!!nd? nd netor; lod is high( I* RAB setu$success rte decreses becuse the indictor 'lue beco!es lrge suddenl)6 *ind theTo$ N cells tht cuse $oer congestion nd then =uer) the chnges o* the !i!u!RT9P >"&(MRT9P? nd !i!u! TCP >"&(MTCP? o* the TOP N cells( I* theRT9P increses se'erel)6 it indictes tht the $roble! is cused b) u$lin; $oercongestion( I* the TCP increses se'erel)6 it indictes tht the $roble! is cused b)donlin; $oer congestion(

:or detils bout the cuses o* the rise in the RT9P nd TCP6 Dudg!ent !ethods6 ndsolution suggestions6 see the section Anl)ing the Min Cuses o* RRC Access:ilure #ee$l) *.RA(.3ail+stCs.8C+.Cong>*.RA(.3ail+stCs.&C+.Cong >*.RA(.3ail+stPs.8C+.Cong> *.RA(.3ail+stPs.&C+.Cong

The RNC RRM !;es ccess lgorith! decision( The RNC RRM cn *ind thed!ission denil becuse o* the insu**icienc) o* u$lin; or donlin; CE resources6 orthe count o* RAB reDections becuse the NodeB returns CE Congestion hen the RNCdeli'ers the RL&ET%P !essge(

The co!!on cuses o* CE congestion re s *ollosH

3igh tr**ic

The residul CEs !intined b) the NodeB re not consistent ith those

!intined b) the RNC(:or detils bout the nl)sis !ethods nd solution suggestions6 see the section "&(RRC(ReD(%L(CE(Cong@ "&(RRC(ReD(#L(CE(Cong(

:or detils bout the nl)sis !ethods nd solution suggestions6 see the

*.RA(.3ail+stCs.Code.Cong >*.RA(.3ail+stPs.Code.Cong

RAB setu$ reDection is !inl) cused b) the insu**icienc) o* code resources( In high-tr**ic scenrio >*or e!$le6 indoor !icro-cell co'erge?6 code resources !) benot enough( 5ou need to e$nd its c$cit)( 7uer) Tble 4 to deter!ine hether the $roble! is cused b) high tr**ic(

F&uggestionsH

Chec; the code setting o* the 3PA( The *olloing con*igurtion is

reco!!endedH

A&& C+H&PA6 AllocCodeode7anual, HsPdschCodeNu'71J @@@ TheRNC is stticll) con*igured ith one 3&P#&C3 code(

+T ACHPARA6 &@NC5&+275P+NJ @@@ Enble the d)n!ic codesitch o* the NodeB

E$nd the c$cit)

*.RA(.3ail+stab.C.&I8((and.Cong>*.RA(.3ail+stab.C.8I8((and.Co

ng>*.RA(.3ail+stab.P.&I8((and.Cong>*.RA(.3ail+stab.P.8I8((and.

Cong

RRC setu$ *ilure is !inl) cused b) the trns!ission congestion on the I%B

inter*ce( 5ou cn chec; the tr**ic nd trns!ission con*igurtion o* the cells6 ndthus Dudge hether the $roble! is cused b) the insu**icienc) o* trns!ission

+01.--2 3uei Con*identil Pge 4< o* 1.4


46/134


resources( :or detils bout the relted counts6 see Tble *.RA(.3ail+stabP.8ns-.5ther

The RAB setu$ *ilure here includes the *olloing *ilureH

The 7o& $r!eters re=uire the RNC not to su$$ort RAB setu$(

RRM d!ission *ils(

The RAB setu$ *ilure here does not include the *ilure becuse o* CE congestion6code congestion6 Iub congestion6 or $oer congestion(

The co!!on cuse is s *ollosH The insu**icienc) o* NodeB resources leds tothe RL Rec*g *ilure( Through the IO& trcing o* the to$ N cells6 )ou cn Dudgehether the RL Rec*g :il on the Iub inter*ce is cused b)SRA#IORE&O%RCE&NOTA"AILABLE(

The insu**icienc) o* resources includes the insu**icienc) o* CE hrdre resources

nd other resources( The CE 3rdre Resources re not Enough

F:eturesH

The CE %sed Nu!ber is lrge6 nd $$roches to the u$$er li!it o* CEs(

In $e; hours6 %ns$(Other occurs !ore *re=uentl)(

%ns$(Other beco!es nor!l grdull) hile tr**ic decreses(

Chec; the signling on the Iub inter*ce6 nd deter!ine hether RL Rec*g :il iscused b) SRA#IORE&O%RCE&NOTA"AILABLE(

FMethod o* nl)sisH

Anl)e the $er*or!nce dt o* the %ns$(Other cells6 *ind the NodeB to hich the

%ns$(Other cells belong6 nd obtin the $er*or!nce dt o* ll the cells o* the NodeB(

7uer) the totl nu!ber o* CEs consu!ed b) ll cells under the NodeB nd the CECount !esured b) the NodeB6 nd chec; hether the) $$roch to the u$$er li!ito* the hrdre CE c$bilit) o* the NodeB(

I* ll the $receding conditions re !et6 )ou cn bsicll) deter!ine tht the $roble! is cused b) the constrint o* hrdre s$eci*ictions o* the NodeB( The NodeB re$orts the CE c$bilit) ccording to the stndrd o* the con*igured

licenses × 110 regrdless o* the hrdre s$eci*ictions( I* License×110 −

%l3oCeRes'&* or license×110 − #l3oCeCodeRes'&* eceeds the hrdre

c$bilit) o* the NodeB6 the $roble! occurs(

F&uggestionsH In the subse=uent R11 'ersion6 the hrdre s$eci*ictions re t;en into ccount

hen the NodeB re$orts the CE c$bilit)( Then6 the $roble! does not occur(

To 'oid the $roble!6 )ou cn decrese the nu!ber o* con*igured licenses( As result6 the i!$cts o* congestion cn be relie'ed through the L#R *unction(

%ns$(Other :ilure Cused b) other :ctors

Collect the IO& in*or!tion bout the $er*or!nce dt6 C3R6 nd to$ N cells6 ndreturn the in*or!tion to the R# de$rt!ent *or nl)sis(

*.RA(.3ail+stC.RIP3ail> *.RA(.3ail+stP.RIP3ail

9hen the RNC sends the RAB A&&IGNMENT RE&PON&E !essge bout RABssign!ent *ilure to the CN6 the indictor is !esured in the best cell o* the %E i* the*ilure cuse 'lue is S:ilure in the Rdio Inter*ce Procedure(

+01.--2 3uei Con*identil Pge 4/ o* 1.4


47/134


9hen nl)ing such *ilure6 )ou need to consider the cuse o* RB setu$ *ilure6 ndnl)e the cuse o* RIP:il !ore dee$l)( Tble 1 lists the relted counts(

Table 1 Indictors o* P& RB setu$ *ilure

-easurement Item Description

"&(:ilRB&etu$(C*g%nsu$ Con*igurtion unsu$$orted

"&(:ilRB&etu$(Ph)Ch:il Ph)sicl chnnel *ilure

"&(:ilRB&etu$(Cell%$d Cell u$dte occurred

"&(:ilRB&etu$(IncC*g In'lid con*igurtion

"&(:ilRB&etu$(NoRe$l) No re$l)

The *olloing section describes the Dudg!ent !ethods nd solution suggestions indi**erent RIP:il scenriosH

"&(:ilRB&etu$(C*g%nsu$

In the RB setu$ $hse6 the %E returns the RB setu$ *ilure !essge( The cuse 'lue isSCon*igurtion unsu$$orted( %sull)6 the *ilure is !inl) cused becuse the %Ec$bilit) does not su$$ort RB setu$( :or e!$le6 the %E recei'es the RB setu$re=uest *or the "P ser'ice >the "P is clling or clled? hen the %E is using the 1+-Kb$s donlin; dt ser'ice( Most ter!inls do not su$$ort the concurrent "P ser'icend high-s$eed P& ser'ice on the donlin;( There*ore6 the %E directl) returns the RBsetu$ *ilure !essge6 nd the cuse 'lue is Sunsu$$orted con*igurtion(

I* such *ilures increse or the *ilure is the !in *ctor tht **ects the RAB ccesssuccess rte6 )ou cn nl)e the distribution o* the %Es tht undergo the *ilure

ccording to the PC3R nd deter!ine hether the *ilure *ocuses on s$eci*icsubscribers( I* )es6 it indictes tht the $er*or!nce o* the %Es is de*ecti'e(

"&(:ilRB&etu$(Ph)Ch:il

In the RB setu$ $hse6 the %E returns the RB setu$ *ilure !essge nd the cuse'lue is SPh)sicl chnnel *ilure( A*ter the %E recei'es the RB &ET%P !essge6 thedonlin; #P#C3 cnnot be s)nchronied( :or detils bout the s)nchronition-relted $roble!s6 see the section RRC(:ilConnEstb(NoRe$l)( The *olloing sectiondescribes the o$ti!ition !esuresH

I* the donlin; is not s)nchronied6 )ou cn rise the $oer o* the PCPIC3 or risethe initil trns!it $oer o* the donlin; #PC3( 3oe'er6 the RNC does not $ro'ide $r!eter *or controlling the initil trns!it $oer o* the donlin; #PC3

se$rtel)6 but cn onl) control the !ini!u! trns!it $oer o* the #PC3( B)con*iguring the !ini!u! trns!it $oer $r!eter o* the #PC36 )ou cn control itsinitil trns!it $oer(

"&(:ilRB&etu$(Cell%$d

At $resent6 the custo!er hs not encountered the RAB ccess *ilure becuse o* thecuse( In cse o* such *ilure6 return the $roble! to the R# de$rt!ent *or nl)sis(

"&(:ilRB&etu$(IncC*g

In the RB setu$ $hse6 the %E returns the RB setu$ *ilure !essge( The cuse 'lue isSIn'lid Con*igurtion( I* such *ilures increse or the *ilure is the !in *ctor tht**ects the RAB ccess success rte6 )ou cn nl)e the distribution o* the %Es thtundergo the *ilure ccording to the PC3R( The current nl)sis shos tht so!e

ter!inls re$ort the RB setu$ *ilure becuse o* Sin'lid Con*igurtion incorrectl) in



48/134


the *olloing s$eci*ic *losH

A*ter recei'ing the RB &ET%P !essge nd be*ore returning the RB &ET%PCOMPLETE !essge6 the %E returns the RRCRB&ET%P:AIL >in'lidCon*igurtion? !essge to the RNC i* recei'ing the RRC#L#IRTRAN&:

>#isconnect? !essge( :or detils6 see the *olloing *igure(

Table # :lo on RB setu$ *ilure becuse o* in'lid con*igurtion

On the I% inter*ce6 the scenrio is Nor!l Relese nd the *ilure cnnot beconsidered s RAB ccess *ilure6 s shon in the *olloing *igure(

Table $ Models o* the ;non %Es tht h'e in'lid con*igurtion

I-0I>I-SI? :0 TP0 Prouce b)

.


49/134


"&(:ilRB&etu$(NoRe$l)

In the RB setu$ $hse6 the RNC deli'ers the RB &ET%P !essge6 but does not recei'en) res$onse( There*ore6 the RNC considers tht RB setu$ *ils( The !in cuses res *ollosH

The donlin; &RB1 is bnor!l6 so the %E does not recei'e the RB &ET%P!essge( The RNC RLC is reset or Rb&etu$Rs$T!r ti!es out(

The %E recei'es the RB &ET%P !essge nd returns the RB &ET%P COMPLETE!essge( 3oe'er6 the NodeB cnnot de!odulte the RB &ET%P COMPLETE!essge becuse the u$lin; &RB+ is bnor!l(

I* the %E recei'es the RB &ET%P !essge but the donlin; cnnot be s)nchronied6 the %E returnsthe RB &ET%P :AIL%RE !essge ith the cuse 'lue o* SPh)sicl chnnel *ilure( In this cse6the setu$ *ilure is considered s "&(:ilRB&etu$(Ph)Ch:il rther thn "&(:ilRB&etu$(NoRe$l)(

The *olloing section describes the Dudg!ent !ethods nd solution suggestions indi**erent scenriosH

5ou need to *irst trce the I:T&(L+ #ATA Re$ort Ti!er100s) o* to$ N cells( 5oucn trce bnor!l signling(

Through signling nl)sis6 chec; hether the u$lin; &RB+ o* the %E sends nedt $c;ets *ter the RB &ET%P !essge is deli'ered( I* )es6 )ou cn thin; thtthe %E recei'es the RB &ET%P !essge nd returns the RB &ET%P COMPLETE!essge(

I* the u$lin; or donlin; BER is high6 )ou cn nl)e hether the $roble! isrelted to the #C3 cti'tion ti!e6 tht is6 hether the cti'tion ti!e o* the %E isnot consistent ith tht o* the NodeB >noteH The $roble! occurs in onl) &on)Ericssons %Es?( The $ri!r) cuse is tht there eists inter*erence on the u$lin; orthe donlin; co'erge is $oor( Es$ecill) in the double-TR #R# scenrio6 theEC@N0 di**erence beteen TRs is gret becuse o* the i!blnce o* co'erge

beteen crriers( I* ll the cses o* RB setu$ ti!eout occur in the #R# scenrio6)ou cn rise the ccess success rte b) o$ti!iing the #R# $r!eters ndcontrolling the #R# occurrence *re=uenc)(

I* both TRs su$$ort R,,@3&PA6 )ou cn o$ti!ie the #R# $r!eters b) usingthe #R# lgorith! bsed on lod blnce(

Enble the #R# lgorith! sitch *or the 3PA ser'ice>Ldb#R#&itch3PA?

Rise the #R# o**set *or the 3PA ser'ice >Ldb#R#O**set3PA?

Loer the #R# $oer re!inder threshold *or the 3PA ser'ice>Ldb#R#LodRe!inThd3PA?

Modi*) the $r!eter TIMERPOLL o* the RLC l)er >to the o$ti!ied 'lueH 1+0?

to increse the &RB retrns!ission o$$ortunities

Rise the #R# EcNo threshold(

*.RA(.3ail+stC.Relo> *.RA(.3ail+stC.Relo

9hile inititing the !igrtion6 the RNC recei'es the RAT &ET%P Re=uest !essge(The RNC does not $rocess the re=uest( The $roble! is cused b) *lo e!bed!ent ndoccurs i!$robbl)( It is relted to the ti!e se=uence o* subscriber beh'iors( The $roble! is usull) controlled in the core netor;(

*.RA(.3ail+stabC.TN>*.RA(.3ail+stP.TN

RAB setu$ *ils becuse o* the *ilure o* trns!ission estblish!ent( The $roble!occurs i!$robbl)( I* the $roble! occurs6 collect the $er*or!nce dt6 C3R log6 ndIO& in*or!tion bout the to$ N cells nd return the in*or!tion to the R#de$rt!ent *or nl)sis(

+01.--2 3uei Con*identil Pge 4, o* 1.4


50/134


*.RA(.3ail+stP.Par

The RNC considers tht the $r!eters deli'ered b) the core netor; re in'lid( The $roble! occurs i!$robbl)( I* the $roble! occurs6 trce the IO& dt o* the to$ Ncells nd return the dt to the R# de$rt!ent *or nl)ing the detiled RAB setu$

in*or!tion( 5ther

I* )ou *ind the increse in the *ilures becuse o* "&(RAB(:lEstP&(RNL(Other6"&(RAB(:ilEstbP&(Other(Cell6 "&(RAB(:ilEstbC&(RNL(Other6 nd"&(RAB(:ilEstbC&(other(CELL6 collect the $er*or!nce dt6 C3R log6 nd IO&dt o* to$ N cells nd return the in*or!tion to the R# de$rt!ent *or nl)sis(

&!' 9ist of Problem Information

Checkl i st for KPI Troubl eshooti ng-

+01.--2 3uei Con*identil Pge


51/134


' 5anover Success Rate>S5.155.?

In n ctul co!!ercil netor;6 the hndo'er-relted $roble!s re closel) relted to clldro$( In !ost cses6 hndo'er *ilure leds to cll dro$( There*ore6 the ch$ter describes thecll dro$ cused b) hndo'er in the sections bout hndo'er success rte( Ch$ter / onl)describes the cll dro$ tht is not cused b) hndo'er *ilure(

B) the hndo'er scenrio6 hndo'er is ctegoried into so*t hndo'er >so*ter hndo'er?6intr-*re=uenc) hrd hndo'er6 inter-*re=uenc) hrd hndo'er6 nd inter-RAT hndo'er( B)the hndo'er ser'ice6 hndo'er is ctegoried into C& >AMR nd "P?6 P& R006 3PA6nd 3&%PA(

The ch$ter ctegories hndo'er b) the hndo'er scenrio6 nd describes the success rte

o* so*t hndo'er nd inter-*re=uenc) hrd hndo'er( Intr-*re=uenc) so*t hndo'er seldo!occurs( Intr-*re=uenc) hrd hndo'er onl) occurs hen so*t hndo'er is not su$$orted6 *ore!$leH

3ndo'er beteen RNC intr-*re=uenc) cells hen no Iur inter*ce is 'ilble

The Iur inter*ce is 'ilble but the Iur inter*ce resources re not enough

3ndo'er becuse o* the control o* the rte threshold o* the P& ser'ice o* the cells

The inter-RAT intero$ertions in'ol'e the intero$ertions beteen the %MT&6 G&M6nd CN( There*ore6 Ch$ter 2 gi'es descri$tion se$rtel)(

'!$ Problems Relate to Soft 5anoverSuccess Rate

'!$!$ 6PI Definition

The *olloing section de*ines the so*t hndo'er success rte6 thus l)ing bsis *or thenl)sis o* so*t hndo'er success rte(

1. ot Hando!er uccess Rate o C er!ice and P RBB er!ice

VS.SH-.Success.Cell.Rate > FSH-.SuccRLA/ESie FSH-.SuccRLDel/ESie ?@> FSH-.AttRLA/ESie FSH-.AttRLDel/ESie ?

#. Change uccess Rate o H&PA er!ing Cell

+01.--2 3uei Con*identil Pge


52/134


VS.HSDPA.Ser(CellC0+.Succ.Rate FVS.HSDPA.SH-.CellC0+.Succ-ut @FVS.HSDPA.SH-.CellC0+.Att-ut

$. Change uccess Rate o H8PA er!ing Cell

VS.HS/PA.SH-.Ser(CellC0+.Succ.Ratio FVS.HS/PA.SH-.Ser(CellC0+.Succ @

FVS.HS/PA.SH-.Ser(CellC0+.Att

'!$!" Influence Factors

The *olloing *ctors **ect the so*t hndo'er success rteH

1. o'e Neighboring Cells are not Conigured

#uring the initil o$ti!ition6 cll dro$ is !inl) cused becuse so!e neighboringcells re not con*igured( :or the intr-*re=uenc) neighboring cells6 )ou cn chec;hether intr-*re=uenc) neighboring cells re not con*igured b) using the *olloing!ethodsH

Method 1H Obser'e the EcIo in*or!tion bout the cti'e set recorded b) the %E nd

the Best &er'er EcIo in*or!tion recorded b) the &cnner be*ore cll dro$( I* the EcIorecorded b) the %E is $oor but the Best &er'er EcIo recorded b) the &cnner is idel6chec; hether the Best &er'er scr!bling code recorded b) the

Troubleshooting of 3G KPI

Documents

Transcript of Troubleshooting of 3G KPI