UMTS Optimization Example Dr. Hatem MOKHTARI

Radio Network Tuning and Optimization for Universal  Mobile  Mob ile Telecomm elecommunica unications tions System (UMTS

Dr. Hatem MOKHTA MOKHTAR R Senior Wireless Consultant

AGENDA • Motivation • 2G-3G, What is different • Tuning Process Flo • Tools used for Tuning !ctivit" • #$ui%&ents Configuration • Pilot Tuning • '# Tuning • Final Words

MOTIVATION • 3G netor(s are )eco&ing co&&erciall" availa)le all over the orld • To chec( the functionalit" functio nalit" of the netor(s )efore co&&ercial launch • *etor( designs are )ased on %ro%agations &odels and si&ulations +coverage verification • 3G technolog" +WCM! is different fro& 2G • Tools and ðods for 3G *etor(s

Differences compared to 2G • In General - The Te Technolog" is &ore & ore co&%licated +/verla%%ing cells, soft hand over, %oer control, cell )reathing etc - 0igh %erfor&ance re$uire&ents on %roducts +'#  *etor( nodes - In Particlar for Tnin! " Optim#ation - Process  tools are under develo%&ent - Co-located GSM3G sites - Shared !ntenna S"ste& - nter-or(ing ith GSM

Tnin! or Optimi#ation$ %&at is t&e difference • Drin! Tnin! *o traffic in the netor(, *o su)scri)ers *etor( tuned onl" )ased on drive test data 5a)our intensive ith re%eated drive test  !ll is a)out Pre-launch activities • Drin! Optimi#ation Co&&ercial traffic, su)scri)ers using the netor( Statistics used idel" to &onitor netor( %erfor&ance rive testing 6ust in case  !ll is a)out Post7launch activities

Tnin! Process 'lo( Radio Network Initial Tuning for Tuning  for WCDMA

Preparations

Parameter Adit

Dri)e Testin! " Post Processin!

Anal+sis " *&an!e Proposals

*&an!e Verification " Reportin!

Co&&ercial 5aunch

Tnin! Process 'lo(c&art

Tools 'or Tnin!,Optimi#ation " Data Post Processin! Acti)e measrement needed de to lac- of statistics • T#MS nvestigation for WCM! +Softare • T#MS Scanner +Softare ; 0W • # 3iteD$ 3ector?$ Antenna Do(ntilt @ De!rees

Primar+ *ommon Pilot *&annel 5P*PI*H6 = PIOT PO/TION Hi!& *PI*H reception le)els from man+

•

P*PI*H R3*P

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− threshold ! >  AS  size

PIOT PO/TION

PIOT PO/TION

PIOT PO/TION *&an!e Proposals Antenna Tilts (degree)

Proosed Antenna Tilts (degree)

Site Name

Sector Number

SC of Pilot

Height of Antenna (meters)

#

1

1

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2

5

#

2

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2

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2$

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PIOT PO/TION

34 3? 24 Nm0ers of 2? 3amples 14 1?

Verification Dri)e Test 5after tnin!6

4 ? 193

98

.:4

9=

3* of Pilots

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.? 34 3?

Initial Dri)e Test 50efore tnin!6

24 Nm0er of 2? 3amples 14 1? 4 ? 193

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/E T/NING • >oice >oice >ideoPS calls  7 5ong calls  7 short calls

• dentif" %ro)le& areas  7 loc(ed calls  7 ro%%ed calls  7 ela"Through%ut

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

on! *alls Anal+sis Set-u% a call and &aintain it until it is dro% +used for the anal"sis of Aetaina)ilit" %erfor&ace %erfor& ace ro%s during long call can )e used to identif"D • Missing *eigh)or Aelation • Coverage Pro)le& • '# Pro)le&s • *etor( Characteristics • est Para&eter Setting • /thers

KEC PER'ORMAN*E PER'ORMAN*E INDI*ATOR3 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

*ase ?> Drop de 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 !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 ds +set )" a A*C %ara&eter • f for an" reason the ne cell can not )e added to !S, call ill )e released

*ase ?> Drop de to missin! nei!&0or  -5 C5#A gets orse

E-*F cell )etter than the serving cell

*ase 2> Drop de 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 %oer and reach its  &a< %oerH The 5 5#A ill %ro)a)l" increase and a nd SA  target cannot &aintain an"&ore, finall" the call dro%sH

*ase 2> Drop de to D Poor *o)era!e

>er" )ad ASCP

'# &a< T< %oer  and high -5 5#A

*ase > P3> 3ession Error de 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 %oer to the &a 3ession Error de to Poor D *o)era!e #** through*ut +64,-*s

.er/ lo0 1SCP

'INA %ORD3 • •

• • • •

•

'or net(or- tnin!$ (e need to rela+ on field measrements (&ic& reire eFtensi)e dri)e tests 'indin! t&e 0est possi0le confi!ration for antenna &ei!&ts$ tilts$ a#imt&s and parameter settin! for all t&e present cells,sectors in t&e net(or- and also for an+ ne( sites t&at mi!&t 0e needed to impro)e co)era!e Po(er adstment can also 0e sed for net(or- tnin! 0t can 0ecome complicated and reslt in poor net(or- performance /se of Remote Electrical Tilt 5RET6 Antenna is preferred o)er mec&anical tilt antenna Nei!&0or definition is of prime importance in /MT3 net(or- 53oft &ando)er !ain and interference redction6. Keep nei!&0or list pto 2;. Atomated tools are needed t&at cold s!!est t&e 0est possi0le nei!&0or relations$ antenna &ei!&ts and tilts 0+ sin! 0ot& t&e field measrements and t&e propa!ation models " simlations 3-illed people$ ri!&t met&ods and ad)anced tools are needed to perform G tnin! and optimisation

*omparison of Mec&anical and Electrical Do(ntilts