RANOP_Part4_Solution findings.ppt

8/21/2019 RANOP_Part4_Solution findings.ppt

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Soc Classification level

Presentation / Author / Date1 © Nokia Siemens Networks

RANOP – Radio Network OptimizationSolution Findins !optimization"




& © Nokia Siemens Networks

Objectives

At t$e end of t$e c$apter' participants will (e a(le to

) know t$e (asic interfaces # Network elements and $ow tooptimize t$ese

) know t$e (asics of CS#PS performance optimization) know w$ic$ tools can (e used for optimization




* © Nokia Siemens Networks

Contents of RANOP

) +ntroduction – ,$at is network optimization

– ,$at s$ould (e taken into account w$en startin NetworkOptimization-

) Assessment

– Situation at t$e moment) .P+s and /easurements

– /easurement ta(les 0 .P+s

) Solution findins !optimization" and verificationSolution findins !optimization" and verification

– /aimum ain in limited time/aimum ain in limited time – 2ottlenecks2ottlenecks

) Features to (e consider – NSN recommended features to (e used in optimization




' © Nokia Siemens Networks

Solution finding – table of contents

) +ntroduction

) Optimization tasks

– Performance optimization

– 3raffic and Capacit4 optimization

– Coverae Optimization

– Fre5uenc4 Optimization

– Nei$(or Optimization

– 6O Optimization

– !7"8PRS Optimization

) Alarms

) +mplementations !documentation9 ood case") Solution verification

) /onitorin

) 3ools to (e used




: © Nokia Siemens Networks

Solution Finding - Introduction

Project

Starts

INPUTS

Assessents Solutions

Priori!ation"or# ordersSolution$erification

I%leentations

Are Criteria&s

Fulfilled

Project

'nds

(onitoring )

*ata collection

Anal+sis Solutions

(ore detailed in%uts

,if necessar+ based

on assessent

.es

No

Project

re%ort

Perforance

Probles

Solution Finding P/ase




Presentation / Author / Date; © Nokia Siemens Networks

Perforance O%tii!ation




< © Nokia Siemens Networks

Perforance O%tii!ation - Introduction

U%lin# Signaling ,access

%robles

Indoor coverage

%robles

*o0nlin# coverage %robles*o0nlin# interference %robles

CS ) PS Ca%acit+

%robles

T+%ical %erforance %robles 0/ic/ /ave tobe i%roved




= © Nokia Siemens Networks

Perforance o%tii!ation - basic CS)PS flo0s

PC12et

S*CC1

'stablis/

S*CC1

connection

2et

TC1

'stablis/

TC1

connection

Call

%/aseRelease

%/aseA2C1

RAC1

PagingO%tii!ation) Accessibilit+

S*CC1O%tii!ation) Accessibilit+

) Signaling

TC1O%tii!ation) Retainabilit+

) 3ualit+

) Traffic ) TS4s allocation

) *ata rates

CS – 5asic Call Flo0

Read+ Send

RAC1

'stablis/

iediate

assignent

2et

P*C1

Re6uested

TS4s to

Allocate

T5F

SessionRelease

%/aseState

PS – (O U%lin# T5F




> © Nokia Siemens Networks

Perforance o%tii!ation

Performance optimization will include $ere?

PS

) // and S/ Sinalin)8PRS Attac$

)P%P Contet activations

) R@C#/AC 3S@ data rate)32F Failure

) 7&7 %ata Rate)3$rou$put

) /ultislot usae)3erritor4 downrades#uprades

)PS 2lockin

) /o(ilit4

)Cell reselection

CS

) Accessi(ilit4) Sinalin pro(lems

) Retaina(ilit4) 3C6 %ropped calls

) ualit4) interference

) 3raffic) 3raffic $andlin




1B © Nokia Siemens Networks

Perforance o%tii!ation – Accessibilit+Signaling

+f pro(lems wit$ RAC69 A8C69 PC6 capacit4

) C$eck if com(ined sinalin is eistin +f it is eistin9 it s$ould (e removed

) C$eck if 3RDS+8 is (i enou$9 default value for 3RDS+8 is *&k+f lots of S/Straffic 0 6R is used ;'k s$ould (e used

) C$eck if t$ere are an4 (ad interference pro(lems

– 2ad interference pro(lem can cause lot of repetitions E more (lockin) C$eck CCC6 related parameters

) C$eck if location areas are optimized

– Sizes

– 2orders

6ere is com(ined sdcc$ in 3S@B

S$ould (e 3S@B E 2CC6

3S@1E S%CC6

CS




11 © Nokia Siemens Networks

Perforance o%tii!ation – Accessibilit+Signaling

Some Plannin# Optimizin .P+s related to accessi(ilit4




1& © Nokia Siemens Networks

Perforance o%tii!ation – Retainabilit+TC1 dro%

+n RANOP we are concentratin on radio reasons

(ost Coon TC1 dro% reasons can be seen /ere

CS




1* © Nokia Siemens Networks

Perforance o%tii!ation – Retainabilit+TC1 dro%

TC1 *ROP *istribution

'7ercise

,$at can (e t4pical reason for 3C6 radio drops-

CS




1' © Nokia Siemens Networks

Perforance o%tii!ation – 3ualit+R8 3ualit+ – 4evel *istribution

1" Proble

All samples (elowG1BBd2m

C49: ;-9::d5

NO37H Same level – 5ualit4distri(ution for (ot$ I@ and %@

CS




1: © Nokia Siemens Networks

1

&

*

1 @ots of ' samples %istri(ution is not O.

6, pro(lem Site reset will $elp& @ots of (ad sinal level samples 3RD#Com(iner is (roken +f no 6, pro(lem

Site is totall4 in wron place9 site is like transferrin traffic to anot$er cell ! cause

level 6O" 34picall4 a 6, pro(lem

* @ots of ; and < samples %istri(ution is not O.9 no : samples 6,

pro(lems Site reset or (roken 3RD

' 34pical normal interference pro(lem9 lots of 5'J5< samples in ood sinal level

6ere are some RD 5ualit4 – level distri(ution eamples

'

CSPerforance o%tii!ation – R8 3ualit+ - 4evel




1; © Nokia Siemens Networks

Perforance o%tii!ation – Interference< U4

/S power control can (e seen $ere+f Power is reduced K no (ad I@

pro(lems 2SC (order is increasinood level samples

2ad interference pro(lems 24 POCparameter interference can (edecreased9 $ow power is adLustedetc Also optimum /S power featureimproves I@ interference9 no fullpower is sent after 6O

2ad 5ualit4 sample due to sinallevel pro(lems %iversit4 s$ould (ec$ecked9 also possi(ilities to use@NA to improve I@ sinal level

Antenna place s$ould (e also

c$ecked if t$ere are some o(staclesnear t$e antenna

CS




1< © Nokia Siemens Networks

Perforance o%tii!ation – InterferenceU4 e7a%les

6ue amount of I@ (ad samples Cells is not workin properl49 it is like transferrin traffic9 I@ 5ualit4# I@ level 6OMs are trierinimmediatel4 3$ese kind of cells must (e investiated

Some I@ interference in ood sinallevel I@ power control is notworkin properl4 Il power control is

ood indicator9 if power is adLusted9t$ere are no (i pro(lems in I@direction

3$ere is no I@ interference9 or Lust alittle /S is adLustin power properl49t$ere are onl4 little samples in ood

I@ sinal level

CS




1= © Nokia Siemens Networks

Perforance o%tii!ation – Interference< *4

2ad interference pro(lem K sinal level ood !G=Bd2m"and sometimes no (etter cell availa(le +f (etter cellavaila(le and 5ualit4 samples are ' or worse K 6O !reason5ualit4 or interference9 depends on t$e parameter"+nterference is causin drops

Reall4 (ad interference pro(lem K sinal level is reall4ood !G<Bd2m" and usuall4 no (etter cell availa(le K no6O K samples can (e seen in t$e ta(le +nterference is

causin drops

Situation is network is workin properl4 +f t$ere are 5ualit4' or worse samples K 5ualit4 6O /ost of t$e samples are5' samples +f lots of 5:5< samples K interferencepro(lem and interference must (e anal4zed # removed +f5ualit4 6Os (ut no 5:5< samples K (etter cell is availa(leK no interference pro(lems +n t$ese sinal levelsoverlappin eists and if $andover reason is no P2839 it will(e 5ualit4 6O 24 parameter amount of 5ualit4 6Os can (eadLusted

2ad 5ualit4 samples due to sinal level pro(lems +f P283overlappin is not eistin K lots of 5ualit4 6Os 0 level 6Os!marin are lower t$an in P283"

Not interference pro(lem9 more coverae pro(lem

C$eck $ow muc$ samples vs 6Os K are(etter cells availa(le or not

CS




1> © Nokia Siemens Networks

Perforance o%tii!ation – Interference*4< e7a%les

3$ere are almost as muc$ samples : and < samples as

' samples K even interference is reall4 (ad or t$ere isno (etter cell availa(le ! no $oMs after (ad 5ualit4 samples"3$ese kind of interference cells s$ould (e optimized9ot$erwise t$ere are lots of drops etc

3$ere are no as muc$ :J< samples as ' samples Kafter interference samples ualit4 6O is done or t$e

interference situation is not so (ad9 for eample samplin isB9&9'9&9:9B9&9*9'9& K 5ualit4 6O is nottrierin

3$ere are (ad 5ualit4 samples onl4 due to sinal levelpro(lems

CS




&B © Nokia Siemens Networks

Perforance o%tii!ation< Interference,internal ) e7ternal

)+nternal +nterference

– +nterference can (e seen from stats or can (e measured (4 scanner

– Nei$(or cells !%@" or mo(iles !I@" are causin interference

– 24 fre5uenc4 # network plannin interference can (e decreased

)7ternal +nterference

– +nterference can (e seen from stats or can (e measured (4 scanner

– 7ternal radio fre5uencies are causin interference

/ilitar4 use

+n t$e (order area9 interference is comin from ot$er countr4

Some eternal wireless s4stem !for eample some wireless industr4 s4stem"is causin interference

+ncreased + level can (e also due to eternal interference

CS




&1 © Nokia Siemens Networks

Perforance o%tii!ation –Traffic /andling

1o0 to balance traffic

bet0een ot/er cells in saesite=

)6O parameters – P283

– ualit4 #interference marins – @evel marins

)6O Features – Im(rella

– 3raffic reason 6O

– %R

)3raffic la4ers

– 1=BB !dual (and"

– C2CC6

5loc#ing in cellA

Traffic 0ill be%us/ed to neig/borcells

cellA

cell5

cellC

CS




&& © Nokia Siemens Networks

Perforance o%tii!ation –Traffic /andling

Soe bloc#ing in cellA

Traffic 0ill be %us/edTo neig/bor cells

cellA

cell5

cellC

1o0 to balance traffic

bet0een ot/er sites=

) 6O parameters

– P283

– ualit4 #interference marins

– @evel marins

) 6O Features

– Im(rella

– 3raffic reason 6O

– %R

CS




&* © Nokia Siemens Networks

Perforance o%tii!ation – e7a%le case

Some 2asic .P+s !one sement" from t$e real network

An4 pro(lems in t$e network-

6ow t$ese can (e fied-




&' © Nokia Siemens Networks

Perforance o%tii!ation – PS

1 As $i$ sinal level as possi(le) +t means t$at even t$e indoor sinal level s$ould (e $i$ enou$ to

$ave /CS> for ettin t$e $i$est data rate on R@C#/AC la4er

& As low interference as possi(le) 3$e aim of $avin $i$ C#+ is to avoid t$rou$put reduction (ased

on interference

* 7nou$ capacit4) 7nou$ 2SS $ardware capacit4 !interface and connectivit4" isneeded to provide t$e re5uired capacit4 for PS, services in time2ot$ CS, and PS, traffic manaement s$ould (e $armonized wit$t$e la4er structure and lon term plans

2efore PS Optimization (asic 8S/ optimization

s$ould (e done




&: © Nokia Siemens Networks

Perforance o%tii!ation – 2PRS Attac/

34pical failures outside 2SS) Iser su(scription

– nonG8PRS users and users from ot$er operators wit$ no roaminareement

) Protocol error

– /ainl4 caused (4 /S not respondin durin attac$9 some possi(le

reasons? Radio contact lost

/S out of coverae

– Collision of sinalin messae – /S sends Attac$ Re5uest or %etac$Re5uest w$en t$e previous Attac$ Re5uest is still in process

34pical recommendations?) PS Core settins

) Furt$er RF optimization

) 8PRS detac$ feature

PS




&; © Nokia Siemens Networks

Perforance o%tii!ation – P*P Conte7tActivation

34pical failures?

) PS Core

) Su(scri(ers use incorrect APN durin P%P Contet ActivationRe5uest

– Su(scri(ers#/S keep reattempt wit$ t$e incorrect APN can (adl4 affect

overall P%P Activation Success Rate

– APN of ot$er operators often seen9 could (ecause of su(scri(ers usint$e same /S wit$ different S+/

PS




&< © Nokia Siemens Networks

Perforance o%tii!ation – T5F Failure

34pical reasons for 32F failures

) Radio reasons – 2ad coverae

– +nterference pro(lems

– 2lockin

) Parameter discrepancies – /CA parameters

– POC

– 8PRSQPOC

+FP9 3FP

) S8SN pro(lems – 8(9 8n traces will (e needed

PS

T5F Failures




&= © Nokia Siemens Networks

Perforance o%tii!ation – T/roug/%ut

) Radio reasons9 t$rou$put # timeslot is (ad

– 2ad coverae

– +nterference pro(lems

⇒%ecreased codin sc$eme E less t$rou$put even man4 timeslots used

) 3S@ allocation pro(lems9 total t$rou$put is (ad

– C$eck territor4 usae) C$eck downrades due to CS, traffic and PS, reLects

) Add more dedicated timeslots for data if possi(le

– C$eck 32F s$arin) +f lots of 32F# 3S@ E c$eck t$at C%7% parameter B

) 3oo muc$ s$arin E territor4 not (i enou$ +f possi(le9 add more dedicated timeslots

) 3ransmission pro(lems – 7%AP conestion

– 8( conestion

PS




&> © Nokia Siemens Networks

Perforance o%tii!ation – (ultislot Usage

3erritor4 downrade and uprade) 3erritor4 downrade due to CS, traffic rise !c11<>"

– CS traffic $andlin

) 3erritor4 downrade due to less PS, traffic!c11=1"

– 3erritor4 optimization9 territor4 is per$aps not (i enou$

– CS 3raffic $andlin) 3erritor4 uprade re5uest reLection (e4ond default territor4

– Iprade re5uest (e4ond %efault territor4 for additional resources,c99>?9 w$ic$ can (e reLected (ecause of @

1 No !7"8PRS capa(le resource left !No !7"8PRS ena(le 3RD or t$e maimum !7"8PRScapacit4 reac$ed"

& PCI and 7%AP capacit4 limitation !&:; A(is 3S@ per PCI"

* 6i$ CS, load

PS

: 9 A B ? D >

*efault territor+

99>?

99E9

99E:

99>

: 9 A B ? D >

*efault territor+

99>?

99E9

99E:

99>




*B © Nokia Siemens Networks

Perforance o%tii!ation – PS 5loc#ing

) 6ard (lockin – no resources availa(le

– /ore 3S@s for data must (e availa(le

C$eck unavaila(ilit4 in t$e cell

/ore dedicated timeslots for data

Amount of CS traffic must (e reduced !traffic $andlin wit$ features"

– RF optimization E (etter t$rou$put E less (lockin) Sof (lockin – 3S@ allocation pro(lems

– C$eck parameters

3erritor4 parameters9 C%7%9 C%7F

C$eck also also !7"8PRS parameters

C$eck also timers

) 3oo muc$ dela4s E more (lockin

PS




*1 © Nokia Siemens Networks

Perforance o%tii!ation – Cell Reselection

34pical main causes?

) 2ad overs$ootin

– %ominance areas are not clear

– 3oo muc$ cell reselections

) @ink (alance pro(lems – I@ # %@

) Cell reselection parameters are not properl4 planned

– C$eck C19C&9 NCCR parameters

– C$eck +FP9 3FP parameters

) 2SC # PCI area optimization is not properl4 done

– %ela4s will (e increased if areas are not properl4 planned

PS




*& © Nokia Siemens Networks

Perforance o%tii!ation – PS '7a%le

An4 pro(lems in t$e network-

6ow t$ese can (e fied-




Presentation / Author / Date** © Nokia Siemens Networks

Traffic and Ca%acit+ O%tii!ation




*' © Nokia Siemens Networks

Solution finding – ca%acit+ o%tii!ation

) ,$at is traffic and capacit4 optimization-

) ,$4 traffic and capacit4 optimization is needed-




*: © Nokia Siemens Networks

) Ater< Transcoder ,TC< A-interface

) 5SC level

) Site level

) TR8 level

) Tieslot level

) Signaling


BSC 2G

SGSN

TC

Abis Gb

BSCBSC 2G

SGSN

2G

SGSN

TC

BCSU

BTS

Air

interface

2S( Arc/itecture

Traffic and Ca%acit+ O%tii!ation levels

MSC

Ater

A




*; © Nokia Siemens Networks

Traffic and Ca%acit+ O%tii!ationIntroduction

) Ater9 3C9 A – Capacit4 and pools

) 2SC

– 2SC 34pe9 2SC load9 8( links

– 2CSI9 capacit4

– 7%AP#PCI 34pe9 @oad) Site

– Antennas9 23S 6,#S, 23S confiuration9 %ual (and9 C2CC69 S%CC6traffic etc

) 3RD

– ,$ere capacit4 will (e needed) 3imeslot

– FR#6R9 A/R FR#6R9 territor49 C/AD9 S%CC6 traffic

) Sinalin

– CCC69 3RDS+89 SS< links




*< © Nokia Siemens Networks

Ater +nterface

) All traffic from 2SC must (e transferred totranscoders Num(er of 71Ms in Ater # Asu(interface is dependin on?

) 3C6 3raffic from all a(is +FMs

) CCS< traffics) O/ links

) Itilization rate

)1 PC/ timeslot in Ater#Asu( interface?

) ;'.(it#s

)1 PC/ timeslot in A(is interface ?

) FRE 1; k(it#s

) 6R E = k(it#s

E ' or = PC/ timeslots in a(is E 1 PC/timeslot in Ater

Abis

interfaces

Traffic and Ca%acit+ O%tii!ationAter< TC< A



Soc Classification level*= © Nokia Siemens Networks


Ater9 A +nterface Num(er of re5uired AG +nterface PC/s is derived from total num(er of

re5uired Ater C$annels '?1 multiplein

For '7a%le) 3otal 7rlans in 2SC E *>&B 7rl

) 2lockin in AGinterface EB1

K 7rlan2 ta(le!*>&B9B1oS "

K 'B'& Ater C$annels

G Ater Interface PC(s H ?:?,'TSI ) 9: H B?

G A interface PC(s,9@? H B?? H 9BD

9 @ 9: ?@9



Soc Classification level*> © Nokia Siemens Networks


) 3otal num(er of re5uired Ater C$annels

) Num(er of Ater c$annels is (ased on total7rlans in 2SC and (lockin in AGinterface

) Confiuration options for 3CS/*i forstandalone installations can (e seen (elow

Re5uired transcodin !3C" capacit4 isderived from

NoteJ In soe solutionTranscoder can bei%leented to (edia2ate0a+ (2"



Soc Classification level'B © Nokia Siemens Networks

Traffic and Ca%acit+ O%tii!ation5SC) 7ample of 2SC capacit4 evolution

1o0 'rlangs are calculated=) T/is de%ends on used traffic %rofile

) *ifferent traffic %rofile HK differentresults

'7a%le< 1o0 to calculate 51 call atte%ts

H ,TotalL'rl 7 BD::s ) eanL/oldingLtie,s

T ffi d C i O i i i



Soc Classification level'1 © Nokia Siemens Networks

Traffic and Ca%acit+ O%tii!ation5SC - '7a%le of Utili!ation

Actual 3RD utilization Actual 3RD utilization Actual 3C6 Itilization Actual 3C6 Itilization

5SC Utili!ation

) TR8 Usage

) TC1 Usage

Utili!ation anal+sis can be used for long ter 5SC o%tii!ation

Ca%acit+ anageent vsJ configuration o%tii!ation

If utili!ation valuesIf utili!ation valuesare too /ig/are too /ig/

HK 5CS Ca%acit+HK 5CS Ca%acit+

o%tii!ation 0ill beo%tii!ation 0ill be

neededneeded

T ffi d C it O ti i ti



Soc Classification level'& © Nokia Siemens Networks

Traffic and Ca%acit+ O%tii!ation5SC - '*AP ) PCU ) 2b

) 7%AP capacit4 can (e optimized (ased on .P+ values

– %@ # I@ /CS selection limited (4 7%AP !dapQ<a9 dapQ=c"

– %@ # I@ /CS selection limited (4 PCI !dapQ>9 dapQ1B"

– Peak %@ 7%AP usae !c<;BB'"

– Peak I@ 7%AP usae !c<;BB:"

– 3erritor4 uprade reLection due to lack of PCI capacit4 !(lckQ*&" – Not too muc$ capacit4 nor too less capacit4

) 7%AP # PCI performance can (e decreased due to 8( link

size – I@# %@ 8( load? frlQ<a# frlQ=a

– 3$is s$ould (e c$ecked alwa4s wit$ 7%AP # PCI optimization




Soc Classification level'* © Nokia Siemens Networks

Traffic and Ca%acit+ O%tii!ation5SC - '*AP ) PCU

) 7%AP (lockin

– +f 7%AP utilization is (elow 1BB E increasin 7%AP does notprovide an4 $elp E PCI optimization needed

– As a rule of t$um( t$e followin estimation ma4 (e used tocalculate num(er of 71Ms

NoteMCan (e used also 31s

71?*& c$annel

31?&' c$annel




Soc Classification level'' © Nokia Siemens Networks

Traffic and Ca%acit+ O%tii!ation5SC - '*AP ) PCU

'*AP bloc#ing alostin ever+ *AP




Soc Classification level': © Nokia Siemens Networks

Traffic and Ca%acit+ O%tii!ation5SC - 2b

) 8( utilization

– +f values near t$res$olds9 it is recommended to increase 8( link sizeOR +mplement 8( over +P

8( (andwidt$Tk(psU

Restrictin 8( linkutilisation TU

1&= &:

&:; ;1

*=' ;=

:1& ;=

;'B <B

<;= <:=>; =:

1B&' >B

Maximum received load % ( DL)8( interface load eample




Soc Classification level'; © Nokia Siemens Networks

Traffic and Ca%acit+ O%tii!ation Site - Indoor solution

+ndoor solutions

? TR8< :'rl

TR8< 'rl Indoor Site

?TR8< 9'rl

5efore

After

NoteM +ndoor solution is collectin traffic inside !$eav4 traffic" office

E @ess fre5uencies is needed outside t$e (uildin




Soc Classification level'< © Nokia Siemens Networks

Traffic and Ca%acit+ O%tii!ationSite - *ual 5and Net0or#

2S( :: la+er ,?TR8@?'rl ,5ad bloc#ing<

2S( :: la+er ,TR8@'rl

2S( :: la+er ,TR8@>'rl ,no bloc#ing

2S( 9E:: la+er ,?TR8@9'rl2S( :: la+er ,9TR8@9<'rl

Actions@) 9E:: la+er 0as added

) Fro :: la+er traffic to 9E:: la+er

) B TR8 0as reoved fro :: la+ers

) Total traffic 0as increased

5efore

After

NoteM *ual band la+ers can be also 2S( :: and "C*(A




Soc Classification level'= © Nokia Siemens Networks

Traffic and Ca%acit+ O%tii!ationSite – Traffic la+ers

3raffic la4ers

) :: (acro

) 9E:: (acro

) ::)9E:: (icro) ::)9E:: Indoor

2 4a+ers

B2 4a+ers) 9:: (acro

) 9:: (icro

) 9:: Indoor

NoteM Traffic bet0een la+ers can be/andled b+ %araeters




Soc Classification level'> © Nokia Siemens Networks

Traffic and Ca%acit+ O%tii!ationTR8 – ca%acit+ 0/ere it is needed

Site configuration in all sites

'rl

'rl

'rl

D'rl

?'rl

'rl

B'rl

?'rl

E'rl

9'rl

B'rl

?'rl

9'rl

9'rl

'rl

5ad 5loc#ing area

) (ore ca%acit+ is needed

'7tra ca%acit+

) tr7 ) cell is too uc/

)HK TR8 can be transferredto t/e cells 0/ere t/ese areore needed




Soc Classification level:B © Nokia Siemens Networks

Traffic and Ca%acit+ O%tii!ationTieslot – A(R FR)1R

6alf rate !6R" is recommended to use w$en?

) /ore capacit4 will (e needed (ut additional 3RDs can not (eadded

– +nterference pro(lems9 Fre5uenc4 reuse

– 6, limitations

) 3emporar4 needs for additional capacit4 – Special events

– %ue to dail4 traffic profile9 additional capacit4 will (e needed Lustfor s$ort time

) 2i cruise is passin (49 tens of calls durin s$ort time




Soc Classification level:1 © Nokia Siemens Networks


) C$annel /ode Adaptation is an 6O alorit$m t$at aims atselect t$e correct c$annel rate !FR or 6R"

) 3$e selection of t$e c$annel rate depends on & mainfactors? load and 5ualit4

loadload8ood8ood

ualit4ualit4

A/R FR A/R FR A/R 6R A/R 6R

A/R 6R A/R 6R A/R FR A/R FR

2ad2ad

ualit4ualit4

packinpackin

unpackinunpackin




Soc Classification level:& © Nokia Siemens Networks

Traffic and Ca%acit+ O%tii!ationTieslot – FR)1R PS territor+

Strate4 – w$ic$ timeslots for data and w$ic$

for speec$-) 2F8 –parameter

) ,$et$er t$e 2CC6 3RD or ot$er 3RDs are preferred in 8PRS c$annel allocation

) FR@ –parameter ) ,it$ t$is parameter t$e percentae of full rate 3C6 resources t$at must (e availa(le for

traffic c$annel allocation is defined

) FRI –parameter ) ,it$ t$is parameter t$e percentae of full rate 3C6 resources t$at must (e availa(le for

traffic c$annel allocation is defined

)NoteH 3erritor4 and dual rate in same 3RD!6R Lustafter territor4" E not ood9 s$ould (e c$aned

1o0 to allocateCS and PSc/annels=




Soc Classification level:* © Nokia Siemens Networks

Traffic and Ca%acit+ O%tii!ation –A(R and PS inter0or#ing< CS TC1 Allocation Calculation

78PRSused#default /2CC6C 3C6% 3C6% 3C6% 3C6% 3C6% 3C6% C%7F

: CS calls

78PRSdownraded /2CC6C 3C6% 3C6% 3C6% 3C6% 3C6% 3C6%

downraded

; CS calls

CTC : CTC9 CTC

Free FR TC1 resources 9 9

"or#ing FR TC1 resources D > >

of free FR resources 9DJ> 9?JB EJD

1R Preferred= N . N

Free FR TC1 resources 9 9 9

"or#ing FR TC1 resources > > >

of free FR resources 9?JB 9?JB 9?JB

1R Preferred= . . .

Territor+do0ngrade due toCS traffic

FR@ E relative amounts offree FR 3C6 resources in

proportion to workin FR 3C6resources

FRL = 15% in this example

CS 3C6 allocation calculation !CTC"

) %efines $ow t$e 8PRS territor4 is seen w$en calculatin FR resourcesCTC $alue

: E Onl4 CS, used R3S@sare used to calculateresources

9 E CS, and PS, usedR3S@s are used PS, usedR3S@s are seen as occupied

resource w$en calculatinPS, R3S@s

E CS, used and PS,used R3S@s are used PS,used R3S@s are seen as idleresource w$en calculatinresources




Soc Classification level:' © Nokia Siemens Networks


1R 0ill be allocated 0/en t/ere are fe0 free FR TC1s availableJ

) T/e %ur%ose is to avoid congestion ) bloc#ing

) 1R HK FR 0/en t/ere are again enoug/ free FR TC1s

) T/res/olds are set b+ %araeters ,FR4< FRU




Soc Classification level:: © Nokia Siemens Networks

Traffic and Ca%acit+ O%tii!ationsignaling -%aging

Paging

3RDS+8 can (e dimensionin (ased on followin ta(le?

) After implementation pain capacit4 .P+s and occurrence of@AP% overload must (e c$ecked

NoteH +f t$e cell is part of t$e lare location area9 $i$ painload is epected 3$us small sinalin links !1;k(ps" s$all (eavoided




Soc Classification level:; © Nokia Siemens Networks

Traffic and Ca%acit+ O%tii!ationsignaling -sdcc/

) Capacit4 of S%CC6 in t$e cell is dependin on t$e amount of

3RDMs in t$e cell) Capacit4 of S%CC6 in t$e cell is also dependin $eavil4 on

3raffic profile9 for eample amount of S/SMs

) S%CC6 (lockin .P+s s$ould (e monitored avoided – And reason for (lockin9 S/S9 @I9 pain etc s$ould (e known

) NoteH 7ceptions are cells t$at cover ports of entr49 suc$ as airports9 w$erea lare num(er of su(scri(er location updates are epected




Soc Classification level:< © Nokia Siemens Networks

Traffic and Ca%acit+ O%tii!ationsignaling - sdcc/

+ncreased %4namic S%CC6

) S%CC6 resources are used for callesta(lis$ment9 location updates ands$ort messaes !S/S"

) %4namic S%CC6 allocation featureconfiures additional S%CC6 resourcesaccordin to t$e traffic situation in a cell

) ,$en a 23S needs temporaril4 larerS%CC6 capacit49 t$en idle 3C6resources are confiured for t$eS%CC6 use

) ,$en t$e conestion situation is overetra S%CC6 resources are confiuredimmediatel4 (ack to 3C6 resources

) 24 usin +ncreased *+naic S*CC1 Capacit49 4ou can use up to *&S%CC6s per nonG2CC6 3RD and &'per 2CC6 3RD

BCCH SDCCH/8 TCHTCHTCHTCHTCHTCH

BCCH SDCCH/8 TCHTCHTCHTCHTCHSDCCH/8

• I ca!e o" SDCCH co#e!$iooe "ree $ra&c c'ael ca

e c'a#ed damicall $oSDCCH/8

• *'e SDCCH/8 i! o lo#ereeded i$ i! c'a#eddamicall ac+ $o TCH




Soc Classification level:= © Nokia Siemens Networks

Traffic and Ca%acit+ O%tii!ationsignaling – SS>

SS< capacit4 plannin depends $eavil4 on traffic profile

) 34pical traffic profile 0 (4tes needed can (e seen (elow) 3raffic in 2SC *>&B 7rl *>&B !7ample"

) Confiuration &0&0& !per cell & sinalin c$annels9 1 dedicated for data "

117600120

3600*3920

3600* _

25* _

==

=

=

s

s Erl llAttempts BusyHourCa

gTime MeanHoldin

s Erl TOTALllAttempts BusyHourCa

mErl s subscriber Erl TOTAL




Soc Classification level:> © Nokia Siemens Networks

Traffic and Ca%acit+ O%tii!ationsignaling – SS>

3otal SS< Capacit4? *B& k(ps

+f SS< utilization is &B

K *B& k(ps # !B& V ;'k(ps"

K &' ;'k(ps SS< links are needed

NoteH)1 71 E *1 ;'k(ps !total *&9 *1 can (e used for t$is purpose"

)1 31 E &' ;'k(ps

3otal t$rou$put must (e calculated (ased on traffic profile !see previous

slide"



Soc Classification levelPresentation / Author / Date;B © Nokia Siemens Networks

Coverage O%tii!ation

Solution finding – coverage o%tii!ation



Soc Classification level;1 © Nokia Siemens Networks


) ,$at is coverae optimization-

) ,$4 coverae optimization is needed-

) 6ow coverae optimization is effectin on – CS performance

– PS performance




Soc Classification level;& © Nokia Siemens Networks

Solution finding coverage o%tii!ation

&B km awa4 from site

) Sinal level G>:d2m-

) Are (ot$ cases critical ones-) Are (ot$ cases coverae pro(lem

cases-

:#

:#2ad coverae – w$at does it mean-




Soc Classification level;* © Nokia Siemens Networks


U4

*4

3UA4IT.

S I 2 N A 4 4 '

$ ' 4

Signal level – 6ualit+ distribution

9 sa%les) signal level ; -9::d5

) 3ualit+ :

HK U4 coverage %roble=

9?>E sa%les

) signal level ; -9::d5

) 3ualit+ >

HK U4 coverage %roble=

7ercise

6ow we s$ould $ere optimize coverae-) An4 pro(lems-




Soc Classification level;' © Nokia Siemens Networks


Sinal level G>BJG>:d2m is man4 times level t$res$old

) 34pical values for ul#dl level 6O !I@9 G>:d2m9 %@9 G>Bd2m"

) I@ # %@ coverae s$ould (e alwa4s anal4zed separatel4

) 6ere9 lots of (ad I@ sinal level samples E I@ coverae s$ould (eimproved

U4

*4

3UA4IT.

S I 2 N A 4 4 ' $ ' 4




Soc Classification level;: © Nokia Siemens Networks


Solutions to improve coverae

) Antenna c$anes 3iltin

Addin antenna wit$ (ier ain

) New cell # site Costl4

) %@ #I@ amplifiers %@9 (oosters

I@9 /ast $ead amplifier !/6A"

) %iversit4 I@

) Reducin losses Com(iner t4pes

Feeder t4pes

) 2etter site # antenna place




Soc Classification level;; © Nokia Siemens Networks

Solution finding coverage o%tii!ationindoor coverage

)/an4 networks $ave insufficient indoor coverae due to $i$ (uildin penetrationloss 3$is includes su(wa4s9 under round facilities and tunnels

)Outdoor coverae is normall4 ok in ur(an and cit4 area +nterference is more anissue for outdoor users

)/icro cell and +ndoor cell are ood solution to improve indoor coverae andnetwork 5ualit4

– Antenna location is main factor for successful indoor coverae plannin

Indoor Panel

Antenna

Indoor BTS

Remote Unit

Master Unit

Optical Fiber RF Cable




Soc Classification level;< © Nokia Siemens Networks

Solution finding coverage o%tii!ationindoor coverage

Ot$er features can (e also used for coverae

optimization) 7tended cell

) Smart radio concept

) Antenna $oppin

Coverage O%tii!ation– '7a%le Case



Soc Classification level;= © Nokia Siemens Networks

Coverage O%tii!ation '7a%le Case

) An4 pro(lems in t$e cells-

) 6ow it can (e fied-

'7a%les of 0rong %araeter set



Soc Classification level;> © Nokia Siemens Networks

% g %i%act on net0or# o%eration)%erforance – call setu%<6ual< bands

1 No calls $appenin in a cell) Cell 2arred

) Non eistent !@AC9 Cell +%" in /SC

) %/AD E B

& Wer4 few calls $appenin in a cell

) R@evAcces/in

) ,ron /NC9 /CC9 @AC declaration

* Wer4 low traffic in a cell) ms3Pwr/a E B9 (s3Pwr/a E *B

' 2ad 5ualit4 in I@ after re$omin: Few traffic in 1=BB la4er of a dual (and >BB#1=BB network

'7a%le 9a



Soc Classification level<B © Nokia Siemens Networks

a % e a

Hadover

Call Se$u,

S X S + N F O * ! 2 C C 6 "

! C e l l 2 a r r A c c e s s E 4 e s "

No calls $appenin in a cell?

) 3$e cell $as (een (arred

'7a%le 9b



Soc Classification level<1 © Nokia Siemens Networks

%

/SC does not find !@AC9

C+" in its data(ase


) C+ different (etween /SC and 2SC or non eistent !@AC9 Cell +%" in /SC

'7a%le 9c



Soc Classification level<& © Nokia Siemens Networks

%


) /s/a%istance+nCallSetup !%/AD" E B

%/AD E B

R@evel E G<Bd2m

Call Setu%

%espite t$e coverae

of t$e cell9 no calls

will (e esta(lis$edH

'7a%le a



Soc Classification level<* © Nokia Siemens Networks

%

Wer4 few calls $appenin in a cell?

) R@evAcces/in

Cell coverage

R74evAccess(in H -?> d5

/appin OSSdata(ase

2SS//@

4o0est range : -99: d5

9 -9: d5

JJJ JJJ

D -?E d5

1ig/est range DB -?> d5

2e careful w$en settin

parameter t$rou$ ml or dat

fileH OSS data(ase unit

s$ould (e used to specif4

parameter valueH

'7a%le b



Soc Classification level<' © Nokia Siemens Networks

%

Wer4 few calls $appenin in a cell?

) ,ron /NC9 /CC9 @AC declaration in network G /NC? B1 Y1 HHH !+n OSS correct value"

NoteH 2e careful w$ensettin parameter t$rou$

ml or dat fileH OSS data(ase

unit s$ould (e used to

specif4 parameter valueH

'7a%le B



Soc Classification level<: © Nokia Siemens Networks

'7a%le B

bsT7P0r(a7 : Q B: d5 : d5bsT7P0r(in : Q B: d5 B: d5

in(sT7Po0er : Q BD d5 : d5

sT7P0r(a7 : Q BD d5

Paraeter $alueLLLLLLL *efault value

23S /a Power E 23S Power – !(s3Pwr/a E B d2"

23S /in Power E 23S Power – !(s3Pwr/in E *B d2"

Attenuation $alues ,d5

Po0er $alues ,d5

/S /a Power E !ms3Pwr/a E ** d2"

/S /in Power E !min/s3Power E 1* d2"

A b s o

l u t e

R * e

l t a

Wer4 low traffic in a cell?

)ms3Pwr/a E B9 (s3Pwr/a E *B

'7a%le ?



Soc Classification level<; © Nokia Siemens Networks

%

2ad 5ualit4 in I@ after re$omin?

) %iversit4Ised parameter not set to 4es an4more

R%+W E X

Iplink %iversit4improves 5ualit4 of

sinal received

After re$omin

R%+W parameterwas set to default

value !No" and I@

5ualit4 was affected

'7a%le



Soc Classification level<< © Nokia Siemens Networks

%

Few traffic in 1=BB la4er of a dual (and >BB#1=BB network?

) +dle /ode? C& parameters not set properl4 !temporar4Offset9penalt43ime"

) +dle # dedicated mode parameters s$ould (e accordin tostrate4

BCCHBCCH

"a!$ movi# moile!lo- movi# moile9E::@ icro-4a+er ::@ acro-la+er



Soc Classification levelPresentation / Author / Date<= © Nokia Siemens Networks

Fre6uenc+ O%tii!ation

Solution finding – fre6uenc+ o%tii!ation




<> © Nokia Siemens Networks

) ,$at is fre5uenc4 optimization-

) ,$4 fre5uenc4 optimization is needed-

) 6ow fre5uenc4 optimization is effectin on – CS performance

– PS performance





=B © Nokia Siemens Networks

8S/ network is (ased on ood fre5uenc4 plannin

2ad fre5uenc4 plannin is causin $i$ interference levels) @ots of drop calls

) CS#PS 5ualit4 is (ad

) Features are not workin properl4

) /a4(e new sites are (uilt due to (ad interference pro(lems) @ots of customer complaints

) Finall4 less customers

E Fre5uenc4 plan s$ould (e properl4 done





=1 © Nokia Siemens Networks

5asic T/eor+

6ow to anal4ze m4 fre5uenc4 plan

) Fre5uenc4 reuse distance

) Fre5uenc4 allocation reuse

) Fre5uenc4 load

) 7ffective fre5uenc4 load





=& © Nokia Siemens Networks

T/eor+< 'ffective reuse

) Since t$e fre5uenc4 (and is alwa4s limited9 t$e fre5uencies $ave to (e reused int$e network

) As t$e reuse distance (ecomes smaller9 t$ere are more fre5uencies availa(le foreac$ cell9 so more capacit4 can (e provided

) T/e effective reuse is essentiall+ t/e sae as t/e conventional fre6uenc+reuse distanceJ

w$ere?

Reff E effective reuse

NfreqsTOT E total num(er of used fre5uencies

NTRXave E averae num(er of 3RDs in a cell

NoteH 3$e smaller t$e effective reuse9 t$e $i$er t$e capacit4 in terms of t$enum(er of 3C6s provided (4 one fre5uenc4 in t$e network

R N

N eff

freqsTOT

TRXae

=





=* © Nokia Siemens Networks

T/eor+< Fre6uenc+ Allocation Reuse RF 1o%%ing onl+

) Fre6uenc+ allocation reuse indicates /o0 closel+ t/e fre6uencies

are actuall+ reused in a net0or#J

w$ere?FAR E fre5uenc4 allocation reuse

NfreqsTOT E total num(er of used fre5uencies

Nfreqs/MA E averae num(er of fre5uencies in /AGlists

) +t indicates t$e severit4 of a worst case C#+ in t$e cell (order

) +f t$e network doesnMt utilize fractional loadin9 t$e fre5uenc4 allocation

reuse is t$e same as t$e effective reuse

!AR N

N

freqsTOT

freqs MA

=

/





=' © Nokia Siemens Networks

T/eor+< Fre6uenc+ load

) 3$e C#+ is low w$en fre5uenc4 collisions occur

– +n order to uarantee an ade5uate 5ualit49 t$e collision pro(a(ilit4 $as to (e made low

– 3$e collision pro(a(ilit4 depends on t$e load of t$e $oppin fre5uencies called a fre5uenc4load

) 3$e fre5uenc4 load descri(es t$e pro(a(ilit4 t$at a fre5uenc4 c$annel is used fortransmission at one cell at one time

) 3$e fre5uenc4 load is a product of two ot$er loads?

– $ard (lockin load !t$e averae (us4 $our 3C6 occupanc4 in most of t$e cases" – fractional load

w$ere?

Lfreq E fre5uenc4 load

LHW E t$e (us4 $our averae $ard (lockin load !see net slides"

Lfrac E fractional load !see net slides"

L L L freq H" frac= ⋅

Solution finding – fre6uenc+ o%tii!ationT/ 1 d bl #i l d




=: © Nokia Siemens Networks

LT

N H"

#opTCH

#opTCH

=

T/eor+< 1ard bloc#ing load

) 3$e $ard (lockin load is calculated as

w$ere?

LH E $ard (lockin load

T h!pT"H E averae num(er of used 3C6s in t$e (us4 $our

N h!pT"H E total num(er of 3C6s in t$e $oppin 3RDs

Solution finding – fre6uenc+ o%tii!ationT/ F ti l l d




=; © Nokia Siemens Networks

T/eor+< Fractional load

) Fractional load means t$at t$e cell $as (een allocated more fre5uencies

t$an 3RDs 3$is is onl4 possi(le for RF $oppin 3RDs) 3$e fractional load is ver4 useful w$en t$e num(er of 3RDs is low 24

utilizin fractional load9 it is possi(le to provide enou$ fre5uencies to $op

over !to et F6 ain" to even a cell wit$ Lust one $oppin 3RD

w$ere?

Lfra# E fractional loadN TRX E num(er of 3RDs in a cell

N freqs/#ell E num(er of fre5uencies allocated to a cell !/AGlist lent$"

L N N

fracTRX

freqs cell

=

/

Solution finding – fre6uenc+ o%tii!ationT/ F 4 d 1" d f ti l l d




=< © Nokia Siemens Networks

T/eor+< Fre6uenc+ 4oad<1" and fractional load

2CC6 1 & * <;'

B 1 & * <;'

B 1 & * <;'

B 1 & * <;'

TR8-9

TR8-

TR8-B

TR8-?

f9

f< fB< f?< f< fD

fB< f?< f< fD< f

f?< f< fD< f< fB

:

:

:

:

Active slotsActive slots '%t+ slots'%t+ slots

)1" load is >)Fractional load F4 isB TR8 ) F H :JD H D:)Fre6uenc+ load is1"4 F4 H ?

)1" load is >)Fractional load F4 is

B TR8 ) F H :JD H D:)Fre6uenc+ load is1"4 F4 H ?

>

!7"8PRS is on t$e 2CC6

la4er in t$is case

Solution finding – fre6uenc+ o%tii!ationT/ 'ff ti F 4 d




== © Nokia Siemens Networks

T/eor+< 'ffective Fre6uenc+ 4oad

) Coverae limited network $as low 7F@

) +nterference limited network $as $i$ 7F@

) +t is calculated (4 t$e e5uation mentioned (elow?

cell ainTRXsag

s frequencieTOT

timeslotsTraffic

reuse Effectie

n$tili%atio H" E!L

_ _ _ _

_ _

_ ==

Solution finding – fre6uenc+ o%tii!ation$i l 5CC1 Pl I ti




=> © Nokia Siemens Networks

$isual 5CC1 Plan Ins%ection

1eav+ re-use

of E

E? re-used

close toget/er

E? re-used

close toget/er

Solution finding – fre6uenc+ o%tii!ation5CC1 C i Utili ti




>B © Nokia Siemens Networks

5CC1 Carrier Utilisation

B

1B

&B

*B

'B

:B

;B

:

1

*

:

1

'

:

1

:

:

1

;

:

1

<

:

1

=

:

1

>

:

&

B

:

&

1

:

&

&

:

<

B

:

<

1

:

<

&

:

<

*

:

<

'

:

<

:

:

<

;

:

<

<

:

<

=

:

<

>

:

=

B

:

=

1

:

=

&

:

=

*

:

=

'

O

c c u r r e n c e

Carriers alsoused in MA List

C/annel distribution

Solution finding – fre6uenc+ o%tii!ation5SIC Utili!ation




>1 © Nokia Siemens Networks

5SIC Utili!ation

) As can (e seen from t$efiure9 amount of 2S+Ccom(inations are not

spread smoot$l4) 2S+C plannin is not

properl4 done E risks todou(le 2CC602S+Ccom(inations is increased

5SIC allocation distribution

NoteH 8ood radio network is (ased on properl4done 2S+C 0 2CC6 Plannin





>& © Nokia Siemens Networks

Sae color H

sae fre6uenc+

Signal level is good<but 6ualit+ is bad

HK Fre6uenc+ %lan isnot %ro%erl+ done

Serving cell

Interfering cell

Solution finding – fre6uenc+ o%tii!ation*ifferent fre6uenc+ %lanning et/ods




>* © Nokia Siemens Networks

*ifferent fre6uenc+ %lanning et/ods

7ercise

6ow t$ese plannin met$ods differs from eac$ ot$er-

) 2ased on Prediction tools

– Plannin 3ools wit$ propaation models) 2ased on +nterference matri

– Optimizer

) /apinfo

– Wisualization

An4 ot$er met$ods-

Solution finding – fre6uenc+ o%tii!ationFre6uenc+ 1o%%ing




>' © Nokia Siemens Networks

Fre6uenc+ 1o%%ing

Network capacit4 and performance ist4picall4 limited (4 coGc$annel

interference9 multipat$ fadin9 dela4spread and noise

Fre5uenc4 6oppin (enefits are (asedon?

+nterference %iversit4

) w$ere interference is averaed overmultiple fre5uencies

Fre5uenc4 %iversit4

) w$ic$ reduces t$e needed fadinmarins

+nterference averain and reducedimmunit4 to sinal fadin ives t$epossi(ilit4 to reduce t$e C#+ marins andti$ten t$e fre5uenc4 reuse sc$emes

Interference

F9

F FB

(SL9 (SL (SLB

F9

F

FB F9

F FB

average

+nterference %iversit4

Fre5uenc4 %iversit4

*istance(S 4ocation

FB

F

F9

2ursts sent on fre5uenc4 F& ma4 (e deraded or lost9 (ut t$e initial sinal isstill (e reconstructed from t$e (ursts on fre5uencies F1 and F*

Sinal

@evel

Solution finding – fre6uenc+ o%tii!ationFre6uenc+ 1o%%ing




>: © Nokia Siemens Networks

Fre6uenc+ 1o%%ing

5aseband 1o%%ing

TR8 9

TR8

TR8 B

: 9 > Tieslot

TR8 ?

5C

C1f 9

f

f B

f ?

6SN13imeslot B $ops over 3RDs &G' onl4

2CC6 does not $op

6SN&

3imeslots 1G< $op over all 3RDs

TR8 9

TR8

TR8 B

: 9 > Tieslot

TR8 ?

2C

C6 f1 – no $oppin

f&9f*fn – $oppin accordin

mo(ile allocation list

One $oppin se5uence

num(er onl4

RF 1o%%ing

Solution finding – fre6uenc+ o%tii!ation*FCA ,* i f / l ll ti




>; © Nokia Siemens Networks

• Loose interference control

• Relies on random spreading of theinterference

• Loose interference control

•Relies on random spreading of theinterference

BCCH

.adom H

Random FHover a xedfrequenclist

!R" #

!R" $

!R" %

!R" &

DC0

!R" #

!R" $

!R" %

!R" &

BCCHCclic FHoverindividuallselected

frequenclists andMA'(sfor eachconnection

C)' * C)' target

• Accurate interference control +C)' estimations,

• -ach connection is assigned .ith the most

suitable radio channel +MA list/ MA'(/ !0L,

• Accurate interference control +C)' estimations,

• -ach connection is assigned .ith the most

suitable radio channel +MA list/ MA'(/ !0L,

*FCA – ,*+naic fre6uenc+ c/annel allocation

Fre6uenc+ o%tii!ation– Consistenc+ c/ec#Cells 0it/ co-c/annel and adj-c/annel fre6uencies




>< © Nokia Siemens Networks

Cell 0 Cell B

Cells 0it/ co-c/annel and adj-c/annel fre6uencies

FR-12#3 FR-124/#3/##

) CoGc$annel fre5uencies? 6O is not possi(le in case of coG2CC6

) AdLGc$annel fre5uencies? 6o is possi(le (ut mi$t fail due tointerference

) +f Co # AdLGc$annel fre5uencies are eistin9 t$ese must (e removed

A

B

56dB54dB

Fre6uenc+ o%tii!ation– Consistenc+ c/ec#C/ec# 5CC1-5SIC and 5CC1 reuse distance




>= © Nokia Siemens Networks

Small distances ma4 (e

danerousH

Reuse &)#$

.1 3 245

BSIC 3 52

.1 3 245

BSIC 3 52

.1 3 245

C/ec# 5CC1-5SIC and 5CC1 reuse distance

Fre6uenc+ o%tii!ation – Consistenc+ c/ec#Ot/er C/ec#s




>> © Nokia Siemens Networks

) Nei$(ors wit$ coGc$annel fre5uencies

) Nei$(ors wit$ adLGc$annel fre5uencies

) Nei$(ors of a same cell wit$ coG2S+C9 coG2CC6

) Nei$(ors from ot$er Wendor

) Fre5uencies # coG2S+Cs near t$e countr4 (order ! if availa(le"

Ot/er C/ec#s

Fre6uenc+ O%tii!ation– '7a%le Case




1BB © Nokia Siemens Networks

) An4 pro(lems-


Cell9

Cell

CellB

'7a%les of 0rong %araeter seti%act on net0or# o%eration)%erforance – fre6uencies




1B1 © Nokia Siemens Networks

i%act on net0or# o%eration)%erforance – fre6uencies

1 %rop call rate increase after new fre5uenc4 planimplementation

) %ou(le 2A @ist activated

& +mpossi(ilit4 to unlock some 23S after a RFGfre5uenc4$oppin implementation

* +mpossi(ilit4 to unlock some 23S after a fre5uenc4 retune

) NONG7%87 3RD9 wit$ 83RD E X

) 3RD9 wit$ 83RD E X9 not attac$ed to an4 7%AP pool

'7a%le 9




1B& © Nokia Siemens Networks

%rop call rate increase after new fre5uenc4 plan implementation?

) +n t$e meantime9 measurement2cc$Allocation $as (een c$aned toidle and /A list defined wit$ old 2CC6 fre5uenc4 (and

BCCH !CH O@% FR7I7NCX P@AN

BCCH !CH 7-8 FR7I7NCX 9LA7 !CH

(L: /A List

3$ese 2CC6 fre5uencies will not (e measured (4 old /A @ist

3$ese 3C6 fre5uencies will (e wronl4 measured

'7a%le




1B* © Nokia Siemens Networks

) After fre5uenc4 $oppin retune9 some 2CC6 fre5uenc4e5ual to 3RD fre5uenc4 of nonG2CC6 3RDs

) After c$anin 3RD fre5uenc49 verif4 2S+C and 3SC!3rainin Se5uence Code" is c$aned accordinl4

Not possi(le to unlock some 23S after a RFGfre5uenc4$oppin implementation?

'7a%le Ba




1B' © Nokia Siemens Networks

+mpossi(ilit4 to unlock some 23S after a fre5uenc4 retune?

) NONG7%87 3RD9 wit$ 83RD E X9 in a cell wit$ 787NA setto 4es

223S

NON-'*2'TR8,s

,'2PRS territor+

'2'NA H .

S'2

2TR8 H .

'*2' TR8,s23S

NON-'*2'TR8,s

'2'NA H .

S'2

2TR8 H N

'*2' TR8,s2,'2PRS territor+

2TR8 H . 2TR8 H .

'7a%le Bb




1B: © Nokia Siemens Networks

+mpossi(ilit4 to unlock some 23S after a fre5uenc4 retune?

) 3RD9 wit$ 83RD E X9 not attac$ed to an4 7%AP pool in a cellwit$ 787NA set to 4es

23S

NON-'*2'TR8,s

'2'NA H .

S'2

2TR8 H N

'*2' TR8,s

2

,'2PRS territor+

2TR8 H .

7%AP pool

9

Add TR8-9 to '*AP%ool




Presentation / Author / Date1B; © Nokia Siemens Networks

Neig/bor O%tii!ation

Solution finding – neig/bor o%tii!ation




1B< © Nokia Siemens Networks

) ,$at is nei$(or optimization-

) ,$4 nei$(or optimization is needed-

) 6ow nei$(or optimization is effectin on – CS performance

– PS performance





1B= © Nokia Siemens Networks

) .eep t$e nei$(or list in order

– NoteH +f lots of overs$ootin E dominance areas are not clear E nei$(orlist are ettin (ier

– 2ad overs$ootin s$ould (e avoided

– /issin nei$(ors – t$e worst situation

) Ise t$e 6andover AdLacenc4 Statistics to identif4 and removenei$(ors

– 2ad overs$ootin cells can cause pro(lems

) +S6O optimization

Avoid?

) nei$(or definitions t$at are coG2CC6 and coG2S+C or AdLG2CC6 andcoG2S+C t$at can lead to wron nei$(or reportin

) OneGwa4 nei$(ors





1B> © Nokia Siemens Networks

2R''N H source

R'* Hneig/bor cell

54U' H no neig/bor

As can be seen< neig/bors are notfull+ o%tii!edJ

T/ere are issing neig/bors andon t/e ot/er /and< soe far a0a+cells are neig/bors





11B © Nokia Siemens Networks

2R''N H source

R'* Hneig/bor cell

54U' H no neig/bor

Overs/ooting cells HK added

to neig/bor listJNeig/bor %lanning is oredifficult to do< if lots ofovers/ooting cells

In t/is area t/ere ig/t be big%robles due to uno%tii!edneig/bors





111 © Nokia Siemens Networks

S'A

C$allenes

) Sites (4 t$e sea) %ominance areas are reac$in

far awa4 E nei$(or cells can(e far awa4

) +ndoor solutions

) Sinal levels from outdoor cellsnear windows can (e $i$

) 6i$ (uildins

) @ots of cells can (e $eart near

t$e window) *8 cells

) @imited amount of nei$(ors

Onl+ fe0 neig/bor cellsHK in t/e sea t/ere 0ill

be %robles





11& © Nokia Siemens Networks

Nei$(or optimization (ased on statistics

) 6O attempts9 (lockin and fails can (e anal4zed as source ortaret cells

) Nei$(or removin can (e done (ased on stats

In case Nuber of 1OAtte%ts is ver+ lo0 to acertain cell< considerreoving t/is cell fro

Adjacenc+ listJ

Neig/bor Planning – Consistenc+ c/ec#Non s+etrical adjacencies




11* © Nokia Siemens Networks

Cell 0 Cell B

Non s+etrical adjacencies

Find all non s4mmetrical adLacencies ?

) cell 2 is nei$(our of Cell A) cell A is not nei$(our of Cell 2

) +f t$ere are non s4mmetrical adLacencies9 t$ese must (ec$aned to s4mmetrical adLacencies

Neig/bor Planning– Consistenc+ c/ec# Neig/bours 0it/ co-c/annel and adj-c/annel fre6uenciesor co 5SIC co 5CC1




11' © Nokia Siemens Networks

or co-5SIC< co-5CC1

Cell A

fE&'

Cell 2

fE1B9 2S+CE&9&

fE&'fE>91B911

fE1B

Nei$(ours wit$ coG2S+C9 coG2CC6?

) /i$t enerate $ostGaccess and

6O drop calls) 6i$ sdcc$ a(is failure and $i$

$andover failure could (e indicatorsfor t$is case

Nei$(ours wit$ coGc$annel oradLacent c$annel fre5uencies?

),ill cause interference (etweennei$(our cells

Cell C

fE1B9 2S+CE&9&

Solution finding – neig/bor o%tii!ation*ifferent et/ods




11: © Nokia Siemens Networks

7ercise

6ow t$ese plannin met$ods differs from eac$ ot$er-1 Add maimum n(r of nei$(ors and after & weeks remove

etra nei$(ors (ased on 6O statistic

&First onl4 nearest !dominance area" and if pro(lems9 add

more nei$(ors

+n nei$(or optimization followin selection met$ods can (eused

) 2ased on Optimizer

) 2ased on /ap

) 2ased on OSS Statistics

Neig/bor %lanning – Consistenc+ c/ec#Ot/er C/ec#s




11; © Nokia Siemens Networks

) C$eck cells in /SC vs cells in 2SC

) C$eck eternal adLacencies in /SC) Non s4mmetrical adLacencies


) *8 nei$(ors

Ot/er C/ec#s




Presentation / Author / Date11< © Nokia Siemens Networks

1andover O%tii!ation

Solution finding – 1O o%tii!ation




11= © Nokia Siemens Networks

) ,$at is a 6andover-

) ,$4 6Os are needed-

) 6andover reasons-





11> © Nokia Siemens Networks

)6O reasons

– P283 – %@ #I@ 5ualit4

– %@ # I@ interference

– %@ # I@ @evel

– Ot$er reasons

) ,$at t$ese reasons tells 4ou a(out t$e network-

) .P+s – w$at 6O .P+s are tellin 4ou a(out t$e network – 6O Failures9 6O drops





1&B © Nokia Siemens Networks

) 6ow t$ese pro(lems can (e seen from 6O .P+s

– Coverae – +nterference

– Capacit4 pro(lems

Solution finding – 1andover o%tii!ation




1&1 © Nokia Siemens Networks

2R''N H source

R'* Hneig/bor cell

54U' H no neig/bor

1andover failures< due to issingneig/bors





1&& © Nokia Siemens Networks

6O Strateies – 3raffic $andlin !>BBG1=BB la4ers"

::

la+er

9E::

la+er

P52T< 6ualit+< level

Ubrella

Traffic Reason

IUO

P52T< 6ualit+< level





1&* © Nokia Siemens Networks

Optimizin 6Os9 6O parameters

) Im(rella ! AIC@ parameter") A/R FR#6R

– Packin9 unpackin parameters

) +nterference # 5ualit4 6O

– +f interference level G<:d2 E interference pro(lems in ood sinal level

– Rest are 5ualit4 6Os E (ad 5ualit4 can (e also due decreased sinallevel

– 3$is difference is ood to know

) @evel # P283

– +f marin is same as P2839 t$e onl4 difference is level9 See eample in

previous slide w$ere @evel 6O disa(led – +t is useful to know if overlappin in ood sinal level and (ad sinal level

Can (e noticed if overs$ootin

+f no @evel 6Os E real coverae pro(lems wit$out overlappin

uali$

Solution finding – 1O o%tii!ationA(R Po0er Control 1O control co-ordination in U4




1&' © Nokia Siemens Networks

UURF

4URF

No ac$io

(B1.)

.xLevel

677dBm 659dBm

4

U U R

, P O C - > :

4 U R

, P O C - F

(:xNx; 2/4)

(:xNx;</7<)

( : x N x ; 7 / 7 )

( : x N x ; 7 / 7 )

( : x N

x ; 7 / 7 )

4 U R

, 1 O C - F

I1RF(:xNx;5/<)

(0M.) ual H=H>S 6<dB

(:xNx; 5/<)

?I1R1

3URF

Power down 5ualit4 Packin of t$e call

Inpackin t$e call

P o w e r d o w n

l e v e l

P o w e r u p

l e v e l

Power up 5ualit4

6 a n d o v e r

t r i e r

7

6andover trier

1O O%tii!ation – Consistenc+ c/ec#S+nc/roni!ed /andover




1&: © Nokia Siemens Networks

Site 2

Site A

NonGs4nc$ronized 6andover

– /S sends access (ursts !6OQACC7SS" !wit$ var4in 3A" until it receives

P6XS+CA@Q+NFOS4nc$ronized 6andover

– /S sends a few access (ursts !6OQACC7SS" and t$en starts transmission wit$previous 3A

NonGs4nc$ronised $andover leads to a loner communication interruption t$an s4nc$ronised

$andover !&BBms vs 1BBms"S4nc$ronized 6O s$ould (e activated (etween sectors of t$e same site +f activated on interG

site adLacencies t$e $andover can fail

S4nc$ronized 6ONonG S4nc$ronized 6O

Solution finding – 1O o%tii!ation*ifferent et/ods




1&; © Nokia Siemens Networks

7ercise 1

+n w$ic$ case t$e network is workin (etter- An4pro(lems-

) All $andovers are 5ualit4 $andovers

) All $andovers are level $andovers

7ercise &

6ow t$ese differs from eac$ ot$er-

) ualit4 6O vs +nterference 6O

) P283 vs @evel 6O) 3raffic $andlin ? decreased power & d2 vs decreased 6O

marin &d2

1O %lanning – '7a%le Case(SC and 5SC Incoing and outgoing 1O success




1&< © Nokia Siemens Networks

) An4 pro(lems-


1O %lanning – Consistenc+ c/ec#Ot/er C/ec#s




1&= © Nokia Siemens Networks

) C$eck cells in /SC vs cells in 2SC

) C$eck eternal adLacencies in /SC) Nei$(ors wit$ coGc$annel fre5uencies

) Nei$(ors wit$ adLGc$annel fre5uencies


) C$eck site wit$ same /A @ist in different sectors and different6SN

) C$eck site wit$ same /A @ist in different sectors and /A+Ocollision

'7a%les of 0rong %araeter seti%act on net0or# o%eration)%erforance – 1andover




1&> © Nokia Siemens Networks

1 No $andover from a cell towards all its nei$(ours

) P@/N permitted E No& 6i$ 6andover failures after implementation of new adLacenc4 plan

) SXNC E X7S

* No $andover $appenin from an interfered cell) $o/arinual set to B

' 1BB of $andover failures in an adLacenc4 relation) CoG2S+C coG2CC6 declaration

: 6i$ num(er of $andovers) $o3$res$olds@evI@ E $o3$res$olds@ev%@

; 6andover not $appenin w$en %@ sinal level of nei$(our muc$reater t$an servin cell

) POC %@ activated

'7a%le 9




1*B © Nokia Siemens Networks

No $andover from a cell towards all its nei$(ours?

) P@/N permitted not set properl4 //@ %efault value is t$e NCC of t$e23S So 6Os will not $appen towards nei$(ours wit$ different NCC

Cell A

NCC B

Cell 5

NCC ?

Plmn permitted B E No

J

Plmn permitted * E Xes

Pln %eritted ? H No

J

Plmn permitted < E No

Set Pln %eritted ? H

.es

P@/N permitted parameter consists actuall4 of = parameters !B J<" related tot$e NCC part of t$e 2S+Cs of nei$(our cells /S onl4 reports measurements ofcells wit$ NCC permitted !plmn permitted E X7S"

No (easureent re%orts of

Cell 5 are sent to 5SCJ So

no 1Os occur fro Cell A to

Cell 5

'7a%le




1*1 © Nokia Siemens Networks

6i$ 6andover failures after implementation of new adLacenc4 plan

) All adLacencies $ave (een implemented wit$ s4nc$ronised

parameter set to 4es 6Os (etween cells of different sites willpro(a(l4 fail

SXNC E X7

SXNC E NONe0 C/annel< Ne0 Cell

ACTI$' CA44

1AN*O C(*

1AN*O ACC

1AN*O CO(

ACTI$' CA44

(S N'T"OR

Old C/annel< Old Cell

P1.S INFO

S+nc/roni!ed 1andover Set SXNC E X7S

onl4 (etween

sectors of t$e

same site

Recommendation is to $ave S4nc 6O wit$in 23Ss in t$esame 2CF and Non S4nc 6O (etween 23Ss in different2CFs

'7a%le B




1*& © Nokia Siemens Networks

No $andover $appenin from an interfered cell

) $o/arinual set to B

+n an interfered cell9 despite $i$ sinal strent$9 5ualit4 is not ood So 6O/arin ual s$ould permit 6O to a cell t$at despite itMs lower sinal strent$9ma4 $ave a (etter 5ualit4

A

B

P283 marin E ;d26o /arin ual E G'

6o /arin ual E B

!//@ %efault"

'7a%le ?




1** © Nokia Siemens Networks

1BB of $andover failures in an adLacenc4 relation

) CoG2CC6 declaration !CoG2S+C"

Cell 0 Cell B

FR-12#3

B0'C 2 %%

FR-12#3

B0'C 2 %%

'7a%le

6i$ num(er of $andovers $o3$res$olds@evI@ E $o3$res$olds@ev%@




1*' © Nokia Siemens Networks

B

1

&

*

'

:

;

<

G 1 1 B

G 1 B =

G 1 B ;

G 1 B '

G 1 B &

G 1 B B

G > =

G > ;

G > '

G > &

G > B

G = =

G = ;

G = '

G = &

G = B

G < =

G < ;

G < '

G < &

G < B

G ; =

G ; ;

G ; '

G ; &

G ; B

G : =

G : ;

G : '

G : &

G : B dBmdBm

uali$uali$

1oT/res/old4evU4)*4

1oT/res/oldInterferenceU4)*4

Interference 1oInterference 1o

No Action NeededNo Action Needed

3ualit+ 1o3ualit+ 1o

4evel 1o4evel 1o

1oT/res/old4ev*41oT/res/old4evU4

ho!hresholdsLev;L/ high thresholds.ill anticipate

H(s<

54= 5* 5#33

ho!hresholdsLev:L<

54= 5* 543

'7a%le D




1*: © Nokia Siemens Networks

6andover not $appenin w$en %@ sinal level of nei$(our

muc$ reater t$an servin cell) Power control %@ activated

A

2

G;d2

G*d2

Power Control

G>d2




1*< © Nokia Siemens Networks

After PS optimization module learnin

) Xou know t$e impact of 8S/ performance on !7"8PRSperformance

) Xou know t$e main assessment activities

) Xou know $ow t$e sinalin9 t$rou$put and mo(ilit4 can (e

optimized

2S( Net0or# as t/e %/+sical la+er of ,'2PRS

3$e optimal 8S/ network from PS, services point of view $as?




1*= © Nokia Siemens Networks

3$e optimal 8S/ network from PS, services point of view $as?1 As $i$ sinal level as possi(le

+t means t$at even t$e indoor sinal level s$ould (e $i$ enou$ to $ave /CS> for ettin t$e

$i$est data rate on R@C#/AC la4er

& As low interference as possi(le 3$e aim of $avin $i$ C#+ is to avoid t$rou$put reduction (ased on interference

* 7nou$ capacit4 7nou$ 2SS $ardware capacit4 !interface and connectivit4" is needed to provide t$e re5uired

capacit4 for PS, services in time 2ot$ CS, and PS, traffic manaement s$ould (e$armonized wit$ t$e la4er structure and lon term plans

' As few cell reGselection as possi(le 3$e dominant cell coverae is important to avoid unnecessar4 cellGreselections in mo(ilit4

3$e prudent PCI allocation can $elp to reduce t$e inter PCI cell reselections

%ominant cell structure can $elp to maimize t$e sinal level and reduce t$e interference9 too

: Features All t$e features s$ould (e used w$ic$ can improve t$e PS, service coverae9 capacit4 and

5ualit4 in eneral

; 3$e 8S/ network is t$e p$4sical la4er of !7"8PRS9 so t$e optimization of8S/ network can improve t$e performance of !7"8PRS9 too

,'2PRS O%tii!ation– TS4 data rate o%tii!ation




1*> © Nokia Siemens Networks

3imeslot optimization is (ased on (asic optimization

– +nterference optimization – Coverae optimization

%ata rate is $eavil4dependin on network5ualit4

) 2etter 5ualit4

⇒ 2etter t$rou$put

⇒ @ess (lockin

3

#3

$3

%3

&3

=3

63

3 = #3 #= $3 $= %3

MC05#

MC05$

MC05%

MC05&

MC05=MC056

MC05>

MC05?

MC054

Coding Paraeters




1'B © Nokia Siemens Networks

78PRS modulation and codin sc$emes?

Sc/ee Code rate 1eaderCode rate

(odulation R4C bloc#s%er Radio

5loc#,A:s-

Ra0 *ata0it/in one

Radio 5loc#

Fail+ 5CS Tail%a+load

1CS *ata rate#b)s

/CSG> 1B B*; & &:>& A :>&

/CSG= B>& B*; & &:'' A :''

/CSG< B<; B*; & &''= 2

&1& &;

''=

/CSG; B'> 1#* 1 :>&:''$%&

A &>;

&<&

/CSG: B*< 1#*

=PS.

1 ''= 2 &&'

/CSG' 1B B:* 1 *:& C 1<;

/CSG* B=B B:* 1 &>;&<&$'%

A 1'=

1*;

/CSG& B;; B:* 1 &&' 2 11&

/CSG1 B:* B:*

8/S.

1 1<; C

1& ;

=

==

NO37? t$e italic captions indicate t$e paddin

Ref< !0 3%@6&

,'2PRS O%tii!ation –Net0or# 'leent and Configuration Assessent

23S2SS

6@R




1'1 © Nokia Siemens Networks

5SC

22SN

IP)(P4S)IPoAT( -

A%%licatio

n Servers

,co-

located

2

S2SN5TS

14R)AC)'IR

TCS(

TC

(SC)$4R

Abis 2b

5SC5SC

22SN22SN

-

bac#bone

A%%licationServers

2

S2SN

2

S2SN5TS

14R)AC)'IR

14R)AC)'IR

TCS(

TC

(SC)$4R

2n2i

2s

RF interface

) Coverae

)C#+

) Capacit4

) 3raffic volume

) /o(ilit4

/S#Clientparameters

) 8PRS#7%87capa(ilit4 andrelease

)/ultislot support

A(is interface

) 7%AP size #dimensionin

) Z of 71#31s

) 8PRS#7%87traffic

8( interface

) 2earer size

) +P vs FR

) %imensionin

23S

) 8PRS territor4

) 23S 6,considerations

!3RD 22Gcard"

) 23S S, !7PCR"

) PCI variant dimensionin

) PCI strate4 in

miedconfiuration

) 2SS S, andfeatures

S8SN

) Init capacit4 !PAPIetc"

) 2SS 8( Flowcontrol

RF

Server

) load

) settins !@inu#,in"

) oS profile

) 8PRS settins

,'2PRS O%tii!ation - Introduction




1'& © Nokia Siemens Networks

!7"8PRS Network Optimization

1 Sinalin capacit4 resource allocationimprovement

& %ata Rate – Connectivit4 Capacit4 !/SGS8SN"

– /ultiplein and multislot usae maimization

* /o(ilit4 improvement

,'2PRS O%tii!ation - Signaling Ca%acit+ Resource Allocation i%roveent




1'* © Nokia Siemens Networks

Sinalin capacit4 resource allocation improvement

1 Sinalin

– PC69 A8C69 RAC6 and S%CC6 !N/O++"

& Resource Allocation

– Cell !re"Gselection

– 23S selection

– Sc$edulin

,'2PRS O%tii!ation - RF SignalingPaging (easureents ,N(O I




1'' © Nokia Siemens Networks

3raffic Wolume) csQpainQmsQsent !c*B:=" !CS pains from 8("

) psQpainQmsQsent !c*B:<" !PS pains from 8("

Conestion !CS 0 PS") maQpainQ(Q(uf !BB*B:B"

Pain success ratio on CS) PACQPA8QR7QFORQCSQPA8 !c<&B=*" # !csQpainQmsQsent" !c*BBB"

Success ratio of Pain on 8s interface !&8 S8SN"

sum!%@Q/7SSA87SQ%+SCAR%7%Q+NQ8S!11BBB""

SsnQ>;1a E GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG V 1BB

sum!CSQPA8+N8Q/S8S 0 %@Q3O/Q/S8S"

Solution for reducing PC1 rejection and load) Isae of com(ined structure9 modif4in /FR and P7R parameters

) @A#RA reGplannin

) Cell splittin

,'2PRS O%tii!ation - RF SignalingA2C1 (easureents




1': © Nokia Siemens Networks

+mmediate Assinment3raffic Wolume !wit$ ReLection"

) immQassnQsent !c*BB1" G +mm Assin"

) immQassnQreL !c*BB&" G +mm Assin ReLected

) packetQimmedQassQms !c<&B='" G PG+mm Assin

) packetQimmedQassQreLQms !c<&B=<" G PG+mm Assin

Conestion

packetQimmedQassQnackQms(lckQ&1( E GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG

packetQimmedQassQnackQms 0 packetQimmedQassQackQms

Solution for reducing A2C1 rejection and load) Isae of com(ined structure9 modif4in A8 and CA@C parameters

) +mmediate Assinment messaes are s$ared (etween PC6 and A8C6

,'2PRS O%tii!ation - RF SignalingRAC1 (easureents




1'; © Nokia Siemens Networks

3raffic WolumePAC.73QC6QR7 !cB<&B=&" !PS,"

C6QR7Q/S8QR7C !cBB*BB'" !CS,"

@oadRAC6Q' E 1BB V av!aveQrac$Q(us4!C*B1'"#resQaccQdenom*!c*B1:""

av!aveQrac$Qslot!c*BB;"#resQaccQdenom1!c*BB<""

Repetitions of PS c$annel re5uests !load and 5ualit4"RAC6Q> E I@Q32FQ,+36QR73RXQ2+3QS73 !cB<&B&B" # PAC.73QC6QR7 !cB<&B=&"

Solution for reducing RAC1 rejection and load) Isae of com(ined structure9 modif4in R73 parameter

) Reducin $i$ I@ interference !and %@ interference if t$e repetition is too $i$"

,'2PRS O%tii!ation - RF SignalingS*CC1 (easureents ,N(O II 0it/ 4A U%date




1'< © Nokia Siemens Networks

3raffic Wolume – S%CC6 seizure attempts !c1BBB"

– Averae availa(le S%CC6 !avaQ':a"

Conestion – 2lockin on S%CC69 (efore FCS !(lckQ:"

– 3ime conestion on S%CC6 !cntQ&"

Solution for reducing S*CC1 load – +ncrease of Periodic RA update timer !PRAI" # /S Reac$a(le timer !/SR3"

%raw(ack? more PAPI capacit4 is needed and more pain will (e enerated9 if t$e /S is out of service

– /ore S%CC6 3S@ allocation and#or %4namic S%CC6 feature usae

– Com(ined RAI !N/OG+ wit$ 8s for !7"8PRS"

– !Resume feature decreases t$e amount of RAIs"

– @A and (order reGplannin

,'2PRS O%tii!ation - Resource AllocationIntroduction

2 i All ti l t d 3 i SR@C#/AC




1'= © Nokia Siemens Networks

2asic Allocation related 3opics

) PS, Activation

) 3erritor4 settins) C$annel pref

CellG!re"selection

) C19 C&

) C*1#C*&

) NCCR

23S Selection

) /ulti2CF and C2CC6

) PCI alorit$m

C$annel Sc$edulin

) Priorit4 (ased oS

Provide enou$ capacit4 to PS,traffic in eneral !find (alance

(etween CS, and PS,"

Allocate t$e traffic to t$e mostappropriate resource

Separate 8PRS and 78PRSand s$are t$e resources

Service and user prioritization

Iser





1'> © Nokia Siemens Networks



J *ata Rate – Connectivit+ Ca%acit+ ,(S-S2SN

– (ulti%le7ing and ultislot usage a7ii!ation

* /o(ilit4 improvement

,'2PRS O%tii!ation–2PRS Territor+

Ci it S it $ d t ffi $ i it t id d di t d t it




1:B © Nokia Siemens Networks

2CC6TR8 9

TR8

3S

CircuitSwitc$ed3erritor4

Circuit #PacketSwitc$ed

3erritor4

*edicated2PRS

Ca%acit+ ,

3S 3S 3S 3S 3S 3S

3S 3S 3S 3S 3S 3S 3S3S

3erritor4 downradeforced (4 t$e CircuitSwitc$ed traffic

3erritor4 uprade in interval of3erritor4 Iprade 8uard 3ime

%efault 8PRS capacit4 t$res$old7tra 8PRS capacit4

Free time slots in Circuit

Switc$ed territor4

De"aul$G:.S

Ca,aci$(%)

) Circuit Switc$ed traffic $as priorit4 outside dedicated territor4

) 8PRS dedicated time slots ! of total cell capacit4" can (e defined Onl4

!7"8PRS can use9 no CS,) %edicated 3S@ is su(set of %efault 3S@

) 3erritories consists of consecutive timeslots

) 8PRS can (e set to favour t$e 2CC6 3ransceiver G minimum interference

Cell ,re - selection

,'2PRS O%tii!ation –Cell ,re - Selection




1:& © Nokia Siemens Networks

23S selection and 3S@ allocation

+nitial 23S Selection

Reallocation of 32Fs amon t$e 23S

1 23S @oad reallocation

& Iplink R level reallocation

* %ownlink R level reallocation' %ownlink RD level received first time

reallocation

32F1 wit$ SSSE;

,'2PRS O%tii!ation –Resource Allocation - Priorit+ based 3oS




1:* © Nokia Siemens Networks

>

# $ % & = 6 > ? 4 #3 ## #$

> ? 4 #3 ## #$ #$ #% #& #= #6 #>

#$ #$ #$ #$ #$ #$ #% #? #? #? #? #?

!time"

T*(A fraes H ?: sH 9 bloc#s

i t it

3$esc$edulin isdone (asedon latestservice time9one 32F at a

time is served(4 t$e R3S@

@atest service time

32F& wit$ SSSE1Latest Service Tie ! "#rrent Tie $ Sc%ed#lin& Ste' Si(e

,'2PRS - T/roug/%ut o%tii!ation

C ti it C it !/S S8SN"




1:' © Nokia Siemens Networks

) Connectivit4 Capacit4 !/SGS8SN"

) 3S@ data rate improvement and multislot usae maimization!2SS"

) 7&7 data rate !applications"

,'2PRS O%tii!ationConnectivit+ Planning – (a7ii!ed Ca%acit+

3$ ti it ti i ti f i it i ( d




1:: © Nokia Siemens Networks

) 3$e connectivit4 optimization for maimum capacit4 is (asedon t$e proper set of C%7F and %AP size

) 3o provide enou$ capacit4 for territor4 uprade t$e <: utilization in t$e connectivit4 limits is recommended (4 NSN

) PCI Connectivit4 capacit4 limits can (e seen (elow

Outputs /a limitV Itilization @imit unit

A(is c$annles !radio 3S@s" &:; <: 1>& 3S@s

7%AP pools 1; <: 1& pcs

23S !cell9 sement" ;' <: '= pcs

3RDs 1&= <: >; pcs

VPCI PCIGS $andle 1&= radio 3S@s onl4 wit$ S11:

VP2CC6 is not implemented

,'2PRS O%tii!ationConnectivit+ in different PCUs

PCU variant 5SC T+%e 5SS99

5SS99J

o0n0ards




1:; © Nokia Siemens Networks

23S ;' ;'

3RD 1&= 1&=

Radio 3S@s &:; 1&=

A(is 1; k(ps c$annels &:; &:;

8( ;' k(ps c$annels *1 *1

23S ;' ;'

3RD 1&= 1&=

Radio 3S@s &:; 1&=



23S ;' ;'

3RD 1&= 1&=

Radio 3S@s &:; &:;



23S N#A 1&=

3RD N#A &:;

Radio 3S@s N#A &:;

A(is 1; k(ps c$annels N#A &:;

8( ;' k(ps c$annels N#A *1

23S & ;' & ;'

3RD & 1&= & 1&=Radio 3S@s & &:; & &:;

A(is 1; k(ps c$annels & &:; & &:;

8( ;' k(ps c$annels & *1 & *1

23S N#A & 1&=

3RD N#A & &:;

Radio 3S@s N#A & &:;

A(is 1; k(ps c$annels N#A & &:;

8( ;' k(ps c$annels N#A & *1

PCI&G% 2SC*i

PCI&GI

PCIG3 2SC79 2SC&9

2SCi9 2SC&i

2SC79 2SC&9

2SCi9 2SC&i

PCIG2 2SC*i

PCI 2SC79 2SC&9

2SCi9 2SC&i

PCIGS 2SC79 2SC&9

2SCi9 2SC&i

,'2PRS O%tii!ationConnectivit+ Planning – Cells ) PCU

T/e follo0ing configuration t+%es 0ered fi d




1:< © Nokia Siemens Networks

3$e followin ta(le s$ows t$e num(er

of 78PRS cell # PCI calculations fort$e different confiuration t4pes

defined@'7tra sall ,C*'FG9 RTS4< *AP G B TS4

Sall ,C*'F G RTS4< *AP G ? TS4(ediu ,C*'F G ? RTS4< *AP G D TS4

4arge ,C*'F G ? RTS4< *AP G E TS4

'7tra large ,C*'F G ? RTS4< *AP G 99 TS4

*ata onster ,C*'F G ? RTS4< *AP G 9D TS4

*ata onster

,*(

*ata /ot s%otsite

1ot s%ot site

For '2PRS

,'2PRS O%tii!ationConnectivit+ Planning – Cells ) PCU

) An4 pro(lems




1:= © Nokia Siemens Networks

) An4 pro(lems

)6ow it can (e fied-

,'2PRS O%tii!ation - PIs

) %@ /CS selection limited (4 7%AP !dapQ<a"

Si il f l f %@ !d = "




1:> © Nokia Siemens Networks

– Similar formula for %@ !dapQ=c"

– %@Q32FSQ,+36Q+NA%7Q7%APQR7S !cB<;BB="

c<;BB= includes lack of PCI resources !c<;B&B %@Q/CSQ@+/+37%Q2XQPCI " as

one reason

+f c<;BB= is updated (ut peak 7%AP usae is less t$an 1BB9 reason is t$at c<;BB=$as (een updated (ecause of lackin PCI resources9

3aret values? 8ood? <: min#824te

2ad? 1:B min#824te

,'2PRS O%tii!ation - PIs

) %@ /CS selection limited (4 PCI !dap >"




1;B © Nokia Siemens Networks

) %@ /CS selection limited (4 PCI !dapQ>"

– Similar formula for I@ ! dapQ1B"

3aret values? 8ood? 1: min#824te

2ad? *B min#824te

,'2PRS O%tii!ation - (ulti%le7ing

C$annel Allocation Alorit$m tends to separate 7%87 32Fs and 8PRS




1;1 © Nokia Siemens Networks

C$annel Allocation Alorit$m tends to separate 7%87 32Fs and 8PRS32Fs on different R3S@ to avoid multiplein9 if onl4 one PS 3erritor4 eists

in t$e cell or t$ere is $i$ load) I@ 8PRS ISF on %@ 78PRS 32F

) 3S@ s$arin G 8PRS#78PRS 32FsM multiplein on a 3S@

3$e alorit$m c$ecks t$e need for reGallocation ever432FQ@OA%Q8IAR%Q36RS6@%9 in order to separate sessions

3$e ma amount of 32Fs per 3S@ can (e limited?

#@@>/ default<>maximum numer of !BFs that a radio time slot canhave in average/ in a 9R0 territor/ in the uplin

direction@

M7;L/aimum Num(er of I@ 32F

#@@4/ default<4maximum numer of !BFs that a radio time slot can

have in average/ in a 9R0 territor/ in the do.nlindirection@

M7:L/aimum Num(er of %@ 32F

Range and :efault:escriptionAreviation9arameter 7ame

#@@>/ default<>maximum numer of !BFs that a radio time slot canhave in average/ in a 9R0 territor/ in the uplin

direction@

M7;L/aimum Num(er of I@ 32F

#@@4/ default<4maximum numer of !BFs that a radio time slot can

have in average/ in a 9R0 territor/ in the do.nlindirection@

M7:L/aimum Num(er of %@ 32F

Range and :efault:escriptionAreviation9arameter 7ame

,'2PRS O%tii!ation –(ulti%le7ing – (easureents ,PIs

Amount of 32Fs # 3S@




1;& © Nokia Siemens Networks

Amount of 32Fs # 3S@

Iplink 32Fs pr timeslot t(fQ*<d

%ownlink 32Fs pr timeslot t(fQ*=d

8PRS 32F multipleed wit$ 78PRS 32F

=PS. codin sc$eme downrade due to 8PRS multiplein rlcQ;1

%@ 7%87 32Fs in 8PRS territor4 t(fQ;B

I@ 7%87 32Fs in 8PRS territor4 t(fQ:>

Ratio of %@ 8PRS 32Fs in 7%87 territor4 t(fQ:=a

Ratio of I@ 8PRS 32Fs in 7%87 territor4 t(fQ:<a

,'2PRS O%tii!ation - (ultislot usageTerritor+ *o0ngrade and U%grade

3$e territor4 downrade $eavil4 depends on t$e size of dedicated and




1;* © Nokia Siemens Networks

3$e territor4 downrade $eavil4 depends on t$e size of dedicated anddefault territor4

) 3erritor4 downrade due to CS, traffic rise) %ownrade re5uest (elow %efault territor4 (ecause of risin CS, ,c99>

) 3erritor4 downrade due to less PS, traffic

) %ownrade re5uest (ack to t$e %efault territor4 w$en t$ere is no need foradditional c$annels an4more ,c99E9

) 3erritor4 uprade re5uest reLection (e4ond default territor4

) Iprade re5uest (e4ond %efault territor4 for additional resources ,c99>?9w$ic$ can (e reLected (ecause of @

1 No !7"8PRS capa(le resource left !No !7"8PRS ena(le 3RD or t$e maimum !7"8PRS capacit4 reac$ed"

& PCI and 7%AP capacit4 limitation !&:; A(is 3S@ per PCI"

* 6i$ CS, load

: 9 A B ? D >

*efault territor+

99>?

99E9

99E:

99>

: 9 A B ? D >

*efault territor+

99>?

99E9

99E:

99>

,'2PRS O%tii!ationFree TS4 Si!e ,after CS U%grade and *o0ngrade

,$en a downrade or uprade procedure is re5uested




1;' © Nokia Siemens Networks

,$en a downrade or uprade procedure is re5uestedfollowin parameters can reduce or increase t$e (order(etween CS, and PS, territories?

TSL number after CS downgrade

3RD num(er 1 & * ' :

<B 0 0 0 1 1

>: 1 1 1 2 2

>> 1 1 2 2 3

TSL number after CS upgrade

3RD num(er 1 & * ' :

1 0 1 1 1 2

' 1 2 2 3 4

< 1 2 3 4 5

1B 2 3 4 5 6

free 3S@ for CS downrade !"

!CS%"

free 3S@ for CS uprade !sec"

!CSI"

,'2PRS O%tii!ation(ultislot Usage – (easureents ,PIs

Actual Territor+




1;: © Nokia Siemens Networks

Actual Territor+

) avaQ''

) Peak PS territor4 !c&B;*"Recommendation? AvaQ'' and c&B;* can (e compared wit$ t$e C%7F settins

+f too (i difference9 t$en C%7F s$ould per$aps (e c$aned9 or more capacit4 s$ould (eadded to t$e cell

(ultislot 5loc#ing

) I@ # %@ multislot allocation (lockin – $ard !t(fQ1:a9 t(fQ1;a") %@ multislot (lockin – soft !(lckQ**a"

Recommendation? 3oo muc$ multislot (lockin s$ows t$at t$e territor4 is per$aps notenou$

And it is also interestin to see $ow man4 timeslots w$ic$ are re5uested !$elpful in

determinin t$e size of t$e default territories") Re5uested timeslots for 8PRS 32Fs c<&B*>Gc<&1'>9 c<&B'BGc<&1:B9 c<&B'1G

c<&1:19 c<&B'&Gc<&1:&

) Re5uested timeslots for 7%87 32Fs c<&1'>9 c<&1:B9 c<&1:19 c<&1:&






1;; © Nokia Siemens Networks



& %ata Rate – Connectivit4 Capacit4 !/SGS8SN"

– /ultiplein and multislot usae maimization

BJ (obilit+ i%roveent

,'2PRS O%tii!ation - (obilit+ O%tii!ation

3$e aim of mo(ilit4 optimization is to reduce t$e cell outae time durin cell




1;< © Nokia Siemens Networks

3$e aim of mo(ilit4 optimization is to reduce t$e cell outae time durin cellreGselection

Cell outae can (e reduced (4

) Providin enou$ sinalin capacit4 for cell reGselection !t$e RAC69 PC69 A8C6 and S%CC6 c$annel are not limitin t$e sinalin flow"

) Re(alancin 2CFs amon PCIs properl4 !t$e important nei$(ors areallocated to t$e same PCI"

) Reallocatin @A#RA (orders properl4

) 7na(lin Network Assisted Cell C$ane !NACC" feature

,'2PRS O%tii!ation –Outage *efinition Used in (easureents

3$ree dela4s can (e




1;= © Nokia Siemens Networks

3$ree dela4s can (ecalculated from los?

Cell outage@) (n !ne)phase a##ess* t$e time

(etween t$e last 78PRS Packet%ownlink Ack#Nack messae andt$e first Packet Iplink Ack#Nack

) (n t+!)phase a##ess* t$e time(etween t$e last 78PRS Packet%ownlink Ack#Nack messae andt$e first Packet Iplink Assinment

*ata outage@

t$e time (etween t$e last and t$efirst 78PRS Packet %ownlink Ack#Nack messae

A%%lication outage@ t$e time (etween t$e last and t$efirst successfull4 received F3PGpacket

-9R0 9acet :o.nlin Ac)7ac

/S 87RAN

Routing Area ;pdate Accept

Routing Area ;pdateComplete

First '9 pacets

Last '9 pacets

*ataOutage

A%%lication Outage

Cell

Outage

Routing Area ;pdate

Request

-9R0 9acet :o.nlin Ac)7ac

9acet ;plinAssignment

,'2PRS O%tii!ationNet0or# Assisted Cell C/ange ,NACC

NACC is in Rel ' of *8PP 87RAN 9 mandator4 for R' mo(iles NSNMs S11:




1;> © Nokia Siemens Networks

NACC is in Rel ' of *8PP 87RAN 9 mandator4 for R' mo(iles NSN s S11:implementation is (ased on Rel'

2ot$9 autonomous and network controlled cell reselections are supported

Support is for intraG2SC cell c$anes !Support of interG2SC NACCspecification is availa(le in Rel :"

NACC support is for /Ss in RR Packet 3ransfer /ode onl4

NACC s$ortens t$e cell reselection in two wa4s?

) Sendin nei$(our cell s4stem information on PACC6 to /S inpacket transfer mode w$ile it is camped on t$e servin cell

) 24 supportin PAC.73 S+ S3A3IS procedure in a taret cell

,'2PRS O%tii!ation–CS Traffic vsJ PS Traffic CS and PS %ea# values at t/e

sae tie ,5SC level data

5 d f PS ti l t ll ti




1<B © Nokia Siemens Networks

⇒ 5ad for PS tieslot allocation

⇒ 4ots of do0ngrading

'7ercise

1o0 to o%tii!e PS %erforance on area level=




Presentation / Author / Date1<1 © Nokia Siemens Networks

Alars

Alars - Introduction

Alarm anal4sis is t$e 1st t$in to (e done in worst cellAlarm anal4sis is t$e 1st t$in to (e done in worst cell




1<& © Nokia Siemens Networks

Alarm anal4sis is t$e 1st t$in to (e done in worst cell Alarm anal4sis is t$e 1st t$in to (e done in worst cell

trou(les$ootinH No use optimizin parameters if 4ou $ave atrou(les$ootinH No use optimizin parameters if 4ou $ave a6, pro(lemH6, pro(lemH

2ad performance of a cell ma4 (e caused (4 fault4 e5uipment) C$eck t$at t$ere are no performanceGaffectin alarms in t$e cell monitored and

also in nei$(our cellsH) Alarms are usuall4 transferred to t$e NetAct data(ase

) /onitorin can (e done t$rou$ //@ Commands9 NetAct 3op @evel Iser +nterface

NoteH Constant monitorin is needed in order to avoid critical alarms in

an4 network element

Alars – 2rou%s




1<' © Nokia Siemens Networks

) 2CF num(er9 23S num(er9 3RD num(er9 Alarm O(Lect9 Init9 %ate9 3ime9 Alarm

Num(er ) Irenc4 level

) Printout t4pe A@AR/ fault situation

CANC7@ fault terminated

%+S3IR distur(ance

NO3+C7 notice

) 7vent t4pe

CO// communication failure

IA@ 5ualit4 of service

PROC7S processin failure

7I+P/ e5uipment failure

7NW+R environmental failure

Note@

3$e urenc4 level isoutput in all alarmprintouts ecept notices!NO3+C7"

3$e urenc4 levels of

terminated alarms areindicated (4 dots !"instead of asterisks !V"

? Lo- :riori$

?? Med :riori$

??? Hi#' :riori$

Alars - Alars in ((4

Alarms in 2SC @evel?




1<: © Nokia Siemens Networks

Alarms in 2SC @evel?

– [A6O? PR+N3 A@AR/S CIRR7N3@X ON

– [A6P? PR+N3 A@AR/ 6+S3ORX

Alarms in 23S @evel?

– [7O@? @+S3 A@AR/S CIRR7N3@X ON

– [7O6? @+S3 A@AR/ 6+S3ORX

2CF9 S78 or 23S confiuration and status

– [77+? OI3PI3 RA%+O N73,OR. CONF+8IRA3+ON

3RD and R3S@ confiuration and status

– [7RO? OI3PI3 3RANSC7+W7R PARA/737RS

Werif4 if 2CF9 S789 23S93RD and R3S@ [email protected]% or [email protected]%\,O !workin"9 2@G ISR!(locked (4 user" or

Restartin

Alars - Alars in ((4

6, 3ests?




1<; © Nokia Siemens Networks

6, 3ests?

) [I2.? 6AN%@7 A2+S @OOP 37S3!Parameters? 23S9 3RD9 R3S@9 Fied or %4namic A(is connection and

A(is 3S@ and Su(G3S@9 loopin time"

) [I2S? S3AR3 3RANSC7+W7R 37S3

!Parameters? 23S9 3RD9 R3S@9 test mode9 R3S@9test selection9 diversit4pat$ selection9test connection9 RF test sinal attenuation923S RDlevel9S3/ antenna attenuation92S 3D power attenuation9 loop duration"

Alars - '7a%les

) &>>*? 23S AN% 3C INSXNC6RON+[A3+ON C@7AR CA@@S ON




1<< © Nokia Siemens Networks

) &>>*? 23S AN% 3C INSXNC6RON+[A3+ON C@7AR CA@@S ON A2+S +N37RFAC7

– 3ranscoder and transmission alarm A(is test is needed

) <B':? 3RD#FI %A3A 3RANSF7R 7RROR 273,77N FI AN% CI1;

– 2ase Station alarm O(served w$en 3C6 failure rate is ver4 $i$ A possi(lesolution can (e to c$ane t$e 3RD

) 7ample of a 23S alarm printout?

Alars - To% 4evel User interface

) 3$e 3opGlevel Iser +nterface contains rap$ical views of t$e network9 in




1<= © Nokia Siemens Networks

p p 9w$ic$ network elements are represented $ierarc$icall4 wit$ s4m(ols

) One of t$e main functions of t$e 3opGlevel Iser +nterface in networkmonitorin is to s$ow t$e alarm situation in all manaed o(Lects




Presentation / Author / Date1<> © Nokia Siemens Networks

I%leentation ) *ocuentation

I%leentation ) *ocuentation

) Optimization process is an iterative process9 so t$ere is no need to create




1=B © Nokia Siemens Networks

trou(lesome final report after ever4 circle /ain items must (e still written

down after ever4 circle

) All t$e activities# findins s$ould (e listed – ,$at s$ould (e done and w$en

– recommendation for t$e c$anes to (e done] and ]workin orders]

) All improvements s$ould (e s$own

– +mplementation time s$ould (e s$own

wit$ improvements Net0or# Re%ort

3asks AndResults




Presentation / Author / Date1=1 © Nokia Siemens Networks

Solution $erification

Solution $erification

) 3$e purpose is to c$eck was solution succeed




1=& © Nokia Siemens Networks

p p

– +s t$e trend positive or neative after implementations

– C$eck t$at collected data is valid

) Paraeter c/anges0ere done :J99

) T/roug/%ut afterc/anges 0as i%roved




Presentation / Author / Date1=* © Nokia Siemens Networks

(onitoring

(onitoring – Introduction

3$e (asic idea to monitor network is to see $ow t$ei i i L i i d $ $ k i




1=' © Nokia Siemens Networks

optimization proLect is onoin and $ow t$e network is

performin

) .P+ monitorin

) 3estin post processin

) Alarm monitorin

) Sc$edule monitorin

) +nvestments c$eckin

) Resource monitorin

(onitoring – Re%orting Suite




1=: © Nokia Siemens Networks

) 5efore Re%orting Suite

can be started<connection to NetActust be done

) Re%orting Suite can beused for PI onitoring

(onitoring – Re%orting Suite




Presentation / Author / Date1=< © Nokia Siemens Networks

Tools to be used

Tools to be used

' l f t l t b d i S l ti fi di



'7a%le of tools to be used in Solution finding

RANOP_Part4_Solution findings.ppt

Documents

Transcript of RANOP_Part4_Solution findings.ppt