Post on 30-May-2018
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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"
#$ui%&ents Configuration
Pilot Tuning
'# Tuning Final Words
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MOTIVATION
3G netor(s are )eco&ing co&&erciall" availa)le all over
the orld
To chec( the functionalit" of the netor(s )eforeco&&ercial launch
*etor( designs are )ased on %ro%agations &odels and
si&ulations +coverage verification
3G technolog" +WCM! is different fro& 2G
Tools and ðods for 3G *etor(s
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Tnin! or Optimi#ation$ %&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 #$ui%&ents for >oice, CS8. PS call
Dri)e test tools confi!ration
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Dri)e Test Rotes
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PIOT T/NING
T&e 0asic measrements of scanner are
CPC0@ASCP +received signal code %oer
CPC0@#c*o+received energ" %er chi% divided )" the
%oer densit" in the )and
ASS+received signal strength indicator
%&at can +o ac&ie)e (it& scanner1
Crossed feeder issues +5
Coverage verification
nterference %ro)le&s +overshooting cell, %ilot %ollution
Missing neigh)ours
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4est 3er)er 3i!nal 3tren!t& 5R3*P6
Bello is
good
lue can
generate%ro)le&s
Gre" is )ad
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Pilot Ec,No Measrements
Green is
good
lue cangenerate
%ro)le&s
/range is
)ad
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INTER'ERNE*E
-1??
-=?
-:?
-9?
-8?
-4?
-.?
-3?
-24 -2? -14 -1? -4 ? 4
Ec,Io 7d48
R3*P7d4m8
0igh interference
" correlating lo #c*o ith high ASCP, areas ith high
interference can )e detected
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Primar+ *ommon Pilot *&annel 5P*PI*H6 =
OVER3HOOTING
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OVER3HOOTING*&an!e Proposal> 3iteD$ 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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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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*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