UMTS Optimization Example Dr. Hatem MOKHTARI

8/9/2019 UMTS Optimization Example Dr. Hatem MOKHTARI

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Radio Network Tuning andOptimization for Universal

Mobile TelecommunicationsSystem (UMTS

Dr. Hatem MOKHTAR

Senior Wireless Consultant


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AGENDA

Motivation

2G-3G, What is different

Tuning Process Flo

Tools used for Tuning !ctivit"

#$ui%&ents Configuration

Pilot Tuning

'# Tuning Final Words


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3

MOTIVATION

3G netor(s are )eco&ing co&&erciall" availa)le all over

the orld

To chec( the functionalit" of the netor(s )eforeco&&ercial launch

*etor( designs are )ased on %ro%agations &odels and

si&ulations +coverage verification

3G technolog" +WCM! is different fro& 2G

Tools and &ethods for 3G *etor(s


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Tnin! or Optimi#ation$ %&at is t&e difference

Drin! Tnin!

*o traffic in the netor(, *o su)scri)ers

*etor( tuned onl" )ased on drive test data

5a)our intensive ith re%eated drive test!ll is a)out Pre-launch activities

Drin! Optimi#ation

Co&&ercial traffic, su)scri)ers using the netor(

Statistics used idel" to &onitor netor( %erfor&ance

rive testing 6ust in case

!ll is a)out Post7launch activities


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Tnin! Process 'lo(

Radio Network Initial Tuningfor WCDMA

Preparations Parameter

Adit

Co&&ercial5aunch

Dri)e Testin! "Post

Processin!

*&an!eVerification" Reportin!

Anal+sis "*&an!e

Proposals


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Tnin! Process 'lo(c&art


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Tools 'or Tnin!,Optimi#ation " Data Post

Processin!Acti)e measrement needed de to lac- of statistics

T#MS nvestigation for WCM! +Softare

T#MS Scanner +Softare ; 0W

#


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USB2USB1

Com 1

scanner

Short call Long Call

USB1

CS64

GPS

USB1

PS

rive Test #$ui%&ents for >oice, CS8. PS call

Dri)e test tools confi!ration


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Dri)e Test Rotes


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PIOT T/NING

T&e 0asic measrements of scanner are

CPC0@ASCP +received signal code %oer

CPC0@#c*o+received energ" %er chi% divided )" the

%oer densit" in the )and

ASS+received signal strength indicator

%&at can +o ac&ie)e (it& scanner1

Crossed feeder issues +5

Coverage verification

nterference %ro)le&s +overshooting cell, %ilot %ollution

Missing neigh)ours


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4est 3er)er 3i!nal 3tren!t& 5R3*P6

Bello is

good

lue can

generate%ro)le&s

Gre" is )ad


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1.

Pilot Ec,No Measrements

Green is

good

lue cangenerate

%ro)le&s

/range is

)ad


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INTER'ERNE*E

-1??

-=?

-:?

-9?

-8?

-4?

-.?

-3?

-24 -2? -14 -1? -4 ? 4

Ec,Io 7d48

R3*P7d4m8

0igh interference

" correlating lo #c*o ith high ASCP, areas ith high

interference can )e detected


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Primar+ *ommon Pilot *&annel 5P*PI*H6 =

OVER3HOOTING


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1:

OVER3HOOTING*&an!e Proposal> 3iteD$ 3ector?$ Antenna Do(ntilt @ De!rees


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1=

Primar+ *ommon Pilot *&annel 5P*PI*H6 =

PIOT PO/TION

P*PI*H R3*P

P*PI*H Ec,No

Hi!& *PI*H reception le)els from man+

*ells$ 5more t&an MABA*TIVEB3ET6

size

serving

cc ASthresholdN

E

N

EcountPilot > !"

00


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2?

PIOT PO/TION


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21

PIOT PO/TION


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?

4

1?

14

2?

24

3?

34

Nm0ers of

3amples

193 98 .:4 9= 2.

3* of Pilots

?

4

1?

14

2?

24

3?

34

.?

Nm0er of

3amples

193 98 9= 2.

3* of Pilots

PIOT PO/TION

Initial Dri)e Test 50efore tnin!6

Verification Dri)e Test 5after tnin!6


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2.

/E T/NING

>oice >ideoPS calls

7 5ong calls

7 short calls

dentif" %ro)le& areas

7 loc(ed calls

7 ro%%ed calls

7 ela"Through%ut


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3&ort *alls Anal+sis

Set-u% a call and &aintain it for a %re-defined ti&e duration

+for 14-8? s

Call set-u% failure and dro%s during short calls can )e &ainl"

used to anal"sis !ccessi)ilit" failure due toD

'# Failure

'nsuita)le Para&eters Setting Coverage Pro)le&

nterference

/thers


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on! *alls Anal+sis

ro%s during long call can )e used to identif"D

Missing *eigh)or Aelation

Coverage Pro)le&

'# Pro)le&s

*etor( Characteristics

est Para&eter Setting

/thers

Set-u% a call and &aintain it until it is dro% +used for

the anal"sis of Aetaina)ilit" %erfor&ace


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KEC PER'ORMAN*E INDI*ATOR3

!ccessa)ilit" +Call set-u% success rate

Aetaina)ilit" +ro%%ed calls

Mo)ilit" +0andover success rate

ntegrit" +5#A and through%ut


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2:

*ase ?> Drop de to missin! nei!&0or

Pro0lem> Detected Ni!&0or 5DN6

'# sends a Measure&ent Ae%ort that contains an event1a

&eans adding a ne A5 +cell to !ctive Set f the re%orted cell is not in the current neigh)or cell list and

the re%orted #c*o is )etter than the )est serving cell

#c*o in !S )" so&e ds +set )" a A*C %ara&eter

f for an" reason the ne cell can not )e added to !S, callill )e released


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2=

*ase ?> Drop de to missin! nei!&0or

E-*F cell )etter than the serving cell

-5 C5#A gets orse

E-*F cell )etter than the serving cell

-5 C5#A gets orse


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3?

*ase 2> Drop de to Poor *o)era!e 5lo( R3*P6

Pro0lem> Poor D co)era!e

When '# gets to an area ith lo ASCP + -1?4 d&

regardless #c*o values there is high ris( for dro%H

'# ill li(el" ra&% u% the trans&itted %oer and reach its

&a< %oerH The 5 5#A ill %ro)a)l" increase and SA

target cannot &aintain an"&ore, finall" the call dro%sH


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*ase 2> Drop de to D Poor *o)era!e

>er" )ad ASCP

'# &a< T< %oer

and

high -5 5#A>er" )ad ASCP

'# &a< T< %oer

and

high -5 5#A


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*ase >

P3> 3ession Error de to Poor D *o)era!e'# enters a ver" lo coverage area +ASCP 7 1?4 d&H

The %ac(et connection is carried on a 8.8. C0 Channel

as conse$uence of the lo coverage conditionsH

The '# ill li(el" ra&% u% its %oer to the &a


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P3> 3ession Error de to Poor D *o)era!e

#** through*ut +64,-*s

.er/ lo0 1SCP

#** through*ut +64,-*s

.er/ lo0 1SCP


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3.

'INA %ORD3

'or net(or- tnin!$ (e need to rela+ on field measrements (&ic&reire eFtensi)e dri)e tests

'indin! t&e 0est possi0le confi!ration for antenna &ei!&ts$ tilts$a#imt&s and parameter settin! for all t&e present cells,sectors in t&enet(or- and also for an+ ne( sites t&at mi!&t 0e needed to impro)eco)era!e

Po(er adstment can also 0e sed for net(or- tnin! 0t can 0ecomecomplicated and reslt in poor net(or- performance

/se of Remote Electrical Tilt 5RET6 Antenna is preferred o)er mec&anicaltilt antenna

Nei!&0or definition is of prime importance in /MT3 net(or- 53oft&ando)er !ain and interference redction6. Keep nei!&0or list pto 2;.

Atomated tools are needed t&at cold s!!est t&e 0est possi0lenei!&0or relations$ antenna &ei!&ts and tilts 0+ sin! 0ot& t&e fieldmeasrements and t&e propa!ation models " simlations

3-illed people$ ri!&t met&ods and ad)anced tools are needed to performG tnin! and optimisation


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*omparison of Mec&anical and Electrical Do(ntilts

UMTS Optimization Example Dr. Hatem MOKHTARI

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