hsdpa optimization guideline v0.1.doc

8/9/2019 HSDPA Optimization Guideline v0.1.doc

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Celcom 3G RAN & Streaming OptiSD

HSDPA Optimization Guideline for CELCO

!er"ion #$%


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'% HSDPA Optimization Guideline for CELCO ('#%'##)

CHANGE HISTORY

Version Date Created by Comments

0.1 25.01.2008 Khoo Nee Sern, Endy First draft version


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3'% HSDPA Optimization Guideline for CELCO ('#%'##)

Table of Contents

1. Objective4

2. Cluster Tuning4

$% Clu"ter Preparation*

$ Dri!e +e"t ,P-"($$% HSDPA +.roug.put($$ R++

($$3 HSDPA Acce""i/ilit0 and Drop"(

$3 12+S Alarm C.ec4

$* Parameter Con"i"tenc0 C.ec4

$( R5 Optimization4

3. Parameter Optimization7

3$% HSDPA Po6er7

3$ -u/ Parameter)3$$% a82itRateNR+ACD5lo6)3$$ SHA)

3$$3 SH5CA)

3$3 HSDPA Selection and o/ilit09

3$* HSDPA impact on R99 u"er"9

4. KP Counter !onitoring1"

*$% Capacit0 and Load%#


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*'% HSDPA Optimization Guideline for CELCO ('#%'##)

*$%$% 2+S Proce""ing Capacit0%#*$%$ DL "preading code"%%*$%$3 12+S Po6er

%%*$%$* -u/ Capacit0%%

*$ HSDPA :"age%3*$$% -u/ Data ;olume and +.roug.put%3*$$ HSDPA data !olume at -u/%3*$$3 Acti!e HS=DSCH ac=d t.roug.put

%3*$$* HSDPA :"er"%3

*$3 HSDPA Performance%**$3$% HSDPA Acce""i/ilit0%**$3$ HSDPA Retaina/ilit0 for NR+ traffic%**$3$3 HSDPA ac=." efficienc0%(*$3$* C?-%4

%$ O/@ecti!e

+.i" document de"cri/e" t.e optimization proce"" for t.e HSDPA$ +.e optimization proce""i" di!ided into t.e follo6ing categorie" t.at are "eparatel0 e8plained

Clu"ter tuning 6.ere t.e purpo"e i" to identif0 an0 poor HSDPA performance 6.ic.

i" cau"ed /0 R5 i""ue" or neig./or planning pro/lem$ +.i" mainl0 focu"e" on R5optimizationB e"peciall0 on t.e .ard6are c.ange"B i$e$ antenna tilt and orientationB

or c.ange" in t.e neig./or li"t"$ Parameter optimization 6.ere t.e purpo"e i" to optimize t.e HSDPA performance

!ia parameter tuningB e$g$ HSDPA po6erB -u/ parameterB etc$

,P- counter" monitoring can /e furt.er u"ed in dail0 optimization to identif0 an0

6or"t performance cell" and trou/le".oot 6.at i" t.e root cau"e of performancedegradation$

$ Clu"ter +uning

5igure /elo6 ".o6" t.e clu"ter tuning proce"" flo6c.art$ Clu"ter tuning i" mainl0 to identif0an0 R5 i""ue" or mi""ing neig./our pro/lem$ -f t.e pro/lem i" not related to R5 i""ue"B t.en

it can /e furt.er optimi"ed from parameter tuning or ,P- counter trou/le".ooting$


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('% HSDPA Optimization Guideline for CELCO ('#%'##)

#igure 1 Cluster tuning process

$% Clu"ter Preparation

2efore "tarting an0 dri!e te"t campaignB t.e clu"ter area ".ould /e 6ell prepared to en"ure

minimal di"ruption to t.e data collection and "u/"euent trou/le".ooting acti!itie"$ +.e dri!ete"t route ".ould co!er a good percentage of main road"B motor6a0" and different cluttert0pe"$ HSDPA i" not "elected during SRNC relocation 6.en :E coming from CELL5ACHB "o6e need to a!oid RNC /order" for HSDPA mo/ilit0$

$ Dri!e +e"t ,P-"

Dri!e te"t ,P-" are calculated after t.e mea"urement collection campaign$ Among t.e ,P-" to/e mea"ured are

2.2.1 HSDPA +.roug.put

HSDPA t.roug.put !arie" due to man0 rea"on"

Capacit0B e$g$ 2+S po6erB -u/ capacit0B CE

odulation "c.eme


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#igure 2 $c%e&ule& TT

2.2.2 R++

Round +rip +ime depend" upon :plin return c.annel /it rate and +ran"mi""ion +ime -nter!al

4* /p" :L u"e" # m" ++- 6.erea" %) and 3)* /p" :L u"e %# m" ++- Size of t.e P-NG pa0load Core net6or connecti!it0

t.e application "er!er ".ould /e connected directl0 to t.e GGSN to minimizet.e R++

Cell load and co!erage condition"

a8imum performance can /e ac.ie!ed 6.en 3)*/p" i" allocated directl0 a" initial /it ratefor uplin during R++ mea"urement"$

2.2.3 HSDPA Acce""i/ilit0 and Drop"

+.i" refer" to t.e num/er of "ucce""ful HS=DSCH allocation and t.e num/er of drop call".appen during t.e t.roug.put mea"urement$

$3 12+S Alarm C.ec


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2efore dri!e te"t "tart"B 6e .a!e to en"ure t.at t.e "ite" in t.e clu"ter are free of an0 ma@oralarm"$ Alarm C.ec can /e done 6it. NetAct Reporting Suite 5ault anagement report" oru"ing "tandard NetAct G:- tool"$ +.e HSDPA related alarm" are

777 PHFS-CAL SHARED CHANNEL CON5-G:RA+-ON 5A-LED +.i" alarm indicate" t.at t.ere .a" /een an error 6.en RNC .a" reue"ted

configuration or reconfiguration of HSDPA c.annel" to 12+S$

7774 HSDPA 5A-L:RE -N 1CEL Po""i/le rea"on HSDPA ena/led in too man0 cell"

$* Parameter Con"i"tenc0 C.ec

-t i" important to mae "ure t.e parameter i" con"i"tentB t.e follo6ing parameter con"i"tenc0c.ec" ".ould /e done regularl0

HSDPA po6er and Pt8+arget t.re".old" #1'*#1')1'ROC "ite" ".ould .a!e different po6er !alue"

-u/ SH5A and SHA parameter" according t.e "ize of ;CC

Dedicated 5CS and HOPS "et" u"ed for HSDPA Recommended parameter" implemented HSDPA ena/led in ma8imum t.ree cell" per 2+S

Alarm 7774 6ill /e rai"ed if more t.an t.ree cell .a!e HSDPA ena/led in a2+S

$( R5 Optimization

HSDPA t.roug.put depend" directl0 on t.e radio c.annel condition"$ +.e"e condition" are

c.anging rapidl0 all t.e time due to fa"t fading of t.e radio c.annel$ 2+S i" a/le to c.anget.e LA for eac. m" ++- /a"ed on t.e c.annel mea"urement"$ A!erage t.roug.put in acertain location can /e e"timated if t.e a!erage S-NR i"no6n$ S-NR i" dependent on t.e EcNoB RSCP and po6er allocation for HS=DSCH and total1CDA po6erB and ort.ogonalit0$

2enefit" t.at can /e gained 6it. R5 Optimi"ation to HSDPA performance -mpro!ing a!erage S-NR for HS=DSCHB i$e$ impro!ing a!erage HSDPA cell

t.roug.put 1ell defined dominance area" reduce" HS=DSCH to 5ACH tran"ition for mo/ile u"er"

if HSDPA mo/ilit0 i" di"a/led 1ell defined dominance area" impro!e" pro/a/ilit0 to get HS=DSCH at t.e call "etup

+.ereforeB it i" e8tremel0 important to perform R5 optimi"ation in area" .a!ing poordominanceB e$g$ p.0"ical c.ange of antenna tiltB /a"ed on "cannerdata$ -n generalB if t.e optimization i" done alread0 for R99B t.en t.ere i" no need for "eparateR5 optimization for HSDPA$

3$ Parameter Optimization

an0 parameter" for HSDPA can /e optimized to impro!e t.e performance$ +.e parameteroptimization can /e categorized into fe6 "u/@ect"


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)'% HSDPA Optimization Guideline for CELCO ('#%'##)

HSDPA t.roug.put

HSDPA po6er "etting

-u/ configuration and parameter "etting

HSDPA "election and mo/ilit0

HSDPA 5CS'HOPS

HSDPA impact to R99 u"er"

HSDPA priorit0

SHA'SH5CA parameter "etting

3$% HSDPA Po6er

-ncrea"ing HSDPA ma8 po6er increa"e" a!erage HSDPA cell t.roug.put$ Ho6e!erB impacton R99 u"er" ".ould al6a0" con"ideredB 6.en increa"ing HSDPA po6er$ +.e follo6ing i" t.eeffect of different "etting" of HSDPA po6er to t.e t.roug.put$

Table 1 '$(P) T%roug%put vs Po*er

D0namic Po6er Control i" a feature in RAS(% t.at allo6" t.e u"er to "et Pt8a8H"dpa eualto t.e total po6er in t.e cell $ +.en t.e HSDPA po6er 6ill /e !aried according tot.e R99 u"age in t.e cell and t.e H"dpaPriorit0 parameter$ Ho6e!erB increa"ingPt8a8H"dpa 6ill po""i/l0 degrade EcNo of t.e R99 and affect t.e R99 performance$


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H"dpaPriorit0 %

#igure 3 '$(P) %as priorit+ over ,-T (C'

H"dpaPriorit0


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%#'% HSDPA Optimization Guideline for CELCO ('#%'##)

#igure 4 ,-T (C' %as priorit+ over '$(P)

3$ -u/ Parameter

3.2.1 a82itRateNR+ACD5lo6

+.i" parameter define" t.e ma8imum /it rate of t.e AC=d flo6$ 5or %4?AB it ".ould /e "eta" 3*(4/p"B and for ?PS, it ".ould /e %44*/p"$

3.2.2 SHA

S.aredH"dpaAllocation i" A+ protocol le!el parameter


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%%'% HSDPA Optimization Guideline for CELCO ('#%'##)

$') /bps0)verage '$(P) T%roug%put /bps0

1 '$(P) 1 '$(P) 1 - 1 '$(P) 2 -

# %### 49# *(#

#$3 %### (94 *7#

#$( %### 4% ((#

Table 2 $') setting

Anot.er impact of SHA "ettingB e"peciall0 to -u/ capacit0=limited "ite" 6it. HSDPA ena/ledB i"t.e increa"e in AAL CAC Re@ection rateB 6.ic. affect" to t.e RRC and RA2 e"ta/li".ment"ucce"" rateB "oft .ando!er "ucce"" rateB and call drop rate$ Care mu"t /e taen to tune t.eSHA parameter to matc. t.e a!aila/le E% configuration of t.e "ite$

3.2.3 SH5CA

S.aredH"dpa5lo6ControlAllocation define" t.e ma8imum amount of HSDPA traffic RNC i"allo6ed to "end to a ;CC on -u/$ +.e impact i" to t.e ac=d flo6B t.erefore t.e con!er"ionrate i" appro8imatel0 SH5CAJ#$7 ac=d flo6 on -u/$

3$3 HSDPA Selection and o/ilit0

Relea"e argin A!erage Ec'No B Relea"e argin Pea Ec'No in HSDPA HOPS can /ec.anged to increa"e HSDPA "election pro/a/ilit0 in SHO area"$ +uning Addition+ime inHSDPA 5CS and Ena/le RRC Connection Relea"eB Relea"e argin A!erage Ec'No BRelea"e argin Pea Ec'No 3$(d2 in HSDPA HOPS can reduce t.e amount of HS=DSCHto 5ACH tran"ition"$ +.i" 6ould lead /etter a!erage mo/ile HSDPA t.roug.put$

#igure '$(P) 'OP$ parameter

CP-CH Ec'No or RSCP HHO t.re".old in HSDPA 5CS ".ould not /e too .ig.B to a!oidtriggering of -5HO'-SHO mea"urement" too earl0 for HSDPA connection"$

3$* HSDPA impact on R99 u"er"

a8imum HSDPA po6er "etting ".ould /e compromi"e /et6een optimized HSDPAperformance and interfering effect on R99$


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%'% HSDPA Optimization Guideline for CELCO ('#%'##)

5igure /elo6 ".o6" an e8ample of t.e degradation of EcNo if Pt8a8H"dpa i" "et to )1$ -nlo6 R5 areaB degraded EcNo 6ill lead to degraded R99 t.roug.put performance$

#igure '$(P) impact on 5c,o

*$ ,P- Counter onitoring

-n t.e optimization proce""B t.e performance mu"t /e continuou"l0 monitored in order totrou/le".oot for optimization "tep" to /e carried out$ +.e follo6ing are t.e main item" inHSDPA performance

Capacit0 and load

Data ;olume and +.roug.put

C?-

o/ilit0

*$% Capacit0 and Load

-t i" important to en"ure t.at t.ere i" "ufficient capacit0 in t.e Node 2 .ard6are B airinterface


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%3'% HSDPA Optimization Guideline for CELCO ('#%'##)

4.1.1 2+S Proce""ing Capacit0

Ena/ling HSDPAB 6it. or 6it.outB acti!e HSDPA u"er" 6ill re"er!e 3 CE if HSDPA i" ena/ledin 2+S$ -f HSDPA i" Ena/led in 3 Cell" it 6ill re"er!e 3J394 CE" $

-n RAS($%B t.ere i" dedicated mea"urement in 2+S for t.e c.annel element u"age$

(##%C#B AKA;A-LCE (##%CB A;EA;A-LCE (##%C3B AK:SEDCEDL (##%C*B AK:SEDCE:L (##%C7B A;GA;A-LCEDL (##%C)B A;GA;A-LCE:L

1e can !erif0 t.e a!erage utili"ed CE again"t t.e a!aila/le CE to identif0 an0 po""i/ilit0 ofCE /locing$

%100CEAVE_AVAIL_M5001C2

E_DLAVG_USED_CM5001C7BTSinDLforCEutiliseof!"tioA#er"$e!C_7&0A x==

%100CEAVE_AVAIL_M5001C2

E_ULAVG_USED_CM5001C'BTSinfor ULCEutiliseof!"tioA#er"$e!C_7&1A x==

Below shows one of the samle of !E "tili#ation of a site with $%S&!s '

(6 C5 tilisation

"

"

1""

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%*'% HSDPA Optimization Guideline for CELCO ('#%'##)

%100

___

____

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25+

,

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,

+

=

=

x

x

SFxAVAILABLECODESNO

ALLOTREECODESUCCNBR

SFxAVAILABLECODESNO

Code tree occupanc0 i" .ea!il0 increa"ed due to HSDPA acti!ationB roug.l0 t.i" mean" 34


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%('% HSDPA Optimization Guideline for CELCO ('#%'##)

-u/ re"er!ation "ucce"" rate can /e monitored to c.ec for an0 re@ection on t.e AAL CACRe"er!ation algorit.m$ HSDPA re"er!ation "ucce"" rate i" calculated /0 /elo6 formula$ -f t.ere"er!ation fail" t.en one of )##C7B )##C) or )##C9 i" incremented$ )##C7 indicate"a lac of e8ternal re"ource" 6.erea" )##C) indicate" a lac of internal re"ource"$ )##C9i" incremented if t.e failure i" for an0 ot.er rea"on$

%100

-CTED_.SD(A*T.E!_!E/ET_.SD(A!E/ECTED_IT!AS(*!T_

T_.SD(A!E/ECTED_ET!AS(*!T_S(DAUCCEEDED_.suAAL2_SS(DA-UCCEEDED_.suAAL2_S

x

++

+

+.e num/er of HSDPA AAL re"er!ation re@ected /ecau"e of too man0 u"er" can /e !erifiedfrom counter REMEC+EDHSDPA+OOANF:SERS. +.i" counter i" incremented infailure ca"e" 6.ere S.ared HSDPA Allocation .a" failed and t.e num/er of AC=d flo6" i" limited to t.e num/er gi!en /0 parameter N/rOfO!er/ooedHSDPA:"er"

AAL CAC re@ection al"o u"eful to "ee 6.at i" t.e impact to R99 u"er" for different SHA"etting$ -t can /e furt.er !erified from Ser!ice Le!el counter" 6.et.er it affect to t.e RRC or

RA2 performance$

%100E/ECTED-AAL2_CAC_!DM_SUCCEEDEsuAAL2_!

D-AC_!E/ECTEsuAAL2_Cx

+

2elo6 figure ".o6" t.e impro!ement of AAL CAC re@ection after fine tuning t.e SHAparameter$

))62 C)C -eservation vs -ejection

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)ve=-eserve&=@an&mi&t% Pea/=C)C=-eserva tion ub=C)C=-eservat ion=- C)C=-e ject ion

#igure ))62 C)C rejection

*$ HSDPA :"age

4.2.1 -u/ Data ;olume and +.roug.put

+.e"e mea"urement" co!er t.e data !olume tran"ferred and t.e ac=." t.roug.put

4.2.2 HSDPA data !olume at -u/

HSDPA recei!ed data in RAN acce"" point"


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[ ]MbitTOTPDUDMACsum

aRNC1000000

&&+3-___2+0'_ =

4.2.3 Acti!e HS=DSCH ac=d t.roug.put

+.e a!erage acti!e HS=DSCH AC=d t.roug.put from net6or per"pecti!e calculated a" t.eHSDPA AC=d t.roug.put at 2+SB di!ided /0 t.e acti!e HS=DSCH time


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*$3 HSDPA Performance

5ollo6ing figure ".o6" t.e counter" in HSDPA traffic mea"urement"$

#igure 11 '$(P) traffic measurement counters

4.3.1 HSDPA Acce""i/ilit0

+.e acce""i/ilit0 of all "tarted allocation" for HS=DSCH for NR+ +raffic from u"er point of !ie6calculate" t.e num/er of time" 6.en HS=DSCH c.annel .a" /een e"ta/li".ed di!ided /0 t.enum/er of time" 6.en HS=DSCH c.annel .a" /een "elected /0 cell "pecific PS$

%100

-_________

_________

__________________

________

__________

________2

-________2+05_

+++

+++

+++

+++

++

++

+

+=

BGRDSCHHSIUBFAILSETUPBGRDSCHHSBTSFAILSETUP

BGRDSCHHSUEFAILSETUPBGRDSCHHSRNCFAILSETUP

INTDSCHHSIUBFAILSETUPINTDSCHHSBTSFAILSETUPINTDSCHHSUEFAILSETUPINTDSCHHSRNCFAILSETUP

BGRRETDSCHHSREJINTRETDSCHHSREJ

BGRUSERSHSDPAMAXSELDCHINTUSERHSDPAMAXSELDCH

BGRFLOWDSCHHSALLOINTFLORDSCHHSALLOsum

BGRFLOWDSCHHSALLOINTFLORDSCHHSALLOsumaRNC

HSDPA AC=d flo6 "etup failure" t0picall0 indicate" lac of t.e re"ource" for HSDPA or for :L return c.annel$ HSDPA Setup can al"o fail if ma8imum amount ofHSDPA u"er" in t.e cell e8ceed"$ 5ailure counter" it"elf are not enoug. to indicateconge"tion /ut toget.er 6it. ot.er counter" e$g$ 2+S CE u"age it i" po""i/le to identif0 cell"

.a!ing capacit0 pro/lem"$


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%)'% HSDPA Optimization Guideline for CELCO ('#%'##)

4.3.2 HSDPA Retaina/ilit0 for NR+ traffic

+.i" ,P- i" /a"ed on +raffic ea"urement$ +.e normal tran"ition from HS=DSCH to5ACH'DCH i" con"idered a" a normal HS=DSCH relea"e $ And t.e failure relea"e" are mainl0 RL 5ailure" relea"e" or relea"e ot.ert.an RL failure$ RL failure relea"e refer to t.e relea"e of HS=DSCH allocation due t.e radio

lin failure indication from 2+SB RLC protocol re"et internall0 in t.e RNC or :L RCLunreco!era/le error


19/21


1+__5_1+__,_

1+__&_1+__2_1+__1_

__5___,___&_

__2___1_1+__5___,__1+__&__1+__2__

_1____5____,__

_&____2____1_____,______&______

___1____________

+07_

++

+++

+++

++++++

+++

+++++

++

=

QAMCODERETRANSQAMCODERETRANS

QAMCODERETRANSQAMCODERETRANSQAMCODERETRANS

QPSCODERETRANSQPSCODERETRANSQPSCODERETRANS

QPSCODERETRANSQPSCODERETRANSQAMCODETRANSORIGCTRANSORIGQAMCODETRANSORIGQAMCODETRANSORIG

CODTRANSORIGQPSCODETRANSORIGQPSCODETRANSORIG

CODTRANSORIGQPSCODETRANSORIGQPSCODETRANSORIGRPDUHSMACCLDISTRETRPDUHSMACCLDISTRETRPDUHSMAC

PDUHSMACCLDISTRETRPDUHSMACOCLDISTRETRPDUHSMAC

bRNC

Di"tri/ution of AC=." retran"mi""ion" indicate" t.e num/er of retran"mi""ion" needed tocorrectl0 deli!er t.e AC=." PD:$ ACHSPD:RE+RD-S+CL# /elo6 indicate" no re=tran"mi""ion percentage i" uite .ig.B more t.an )#$

!)C?%s -e?Transmission (istribution

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!)C='$=P(=-5T-=($T=C6=" !)C='$=P(=-5T-=($T=C6=1 !)C='$=P(=-5T-=($T=C6=2 !)C='$=P(=-5T-=($T=C6=3

!)C='$=P(=-5T-=($T=C6=4 !)C='$=P(=-5T-=($T=C6=

#igure 12 !)C?%s retransmission

2elo6 ".o6" t.e tran"mi""ion and retran"mi""ion mainl0 u"ing ( code"B ?PS, or %4?A$


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#'% HSDPA Optimization Guideline for CELCO ('#%'##)

#igure 13 '$(P) mo&ulation t+pes

4.3.4 C?-

HS=DSCH Lin Adaptation and HSSCCH po6er control are /a"ed on t.e in"tantaneou""ignal ualit0 information recei!ed from t.e :EB i$e$ C.annel ?ualit0 -ndicatorB C?-$+.eoreticall0 C?- can /e u"ed a" a reference of potential t.roug.put$ E8ample of di"tri/utioncan /e "een in figure /elo6$

#igure 14 CA &istribution

C?- reporting i" :E dependentB "o different :E" can report different C?- !alue" in t.e "imilarcondition"$

A!erage reported C?-

&1

L_&0C6I_DIST_C

C6I_DISL_27C6I_DIST_CL_2+C6I_DIST_CL_25C6I_DIST_CL_2,C6I_DIST_C

C6I_DISL_21C6I_DIST_CL_20C6I_DIST_CL_1C6I_DIST_CL_1'C6I_DIST_C

C6I_DISL_15C6I_DIST_CL_1,C6I_DIST_CL_1&C6I_DIST_CL_12C6I_DIST_C

LC6I_DIST_CL_C6I_DIST_CL_'C6I_DIST_CL_7C6I_DIST_CL_+C6I_DIST_C

C6I_DIL_&C6I_DIST_CL_2C6I_DIST_CL_1C6I_DIST_C-ST_CL_0suC6I_DI

70+_

+

+++++

+++++

+++++

+++++

++++

=aRNC


21/21

%'% HSDPA Optimization Guideline for CELCO ('#%'##)

hsdpa optimization guideline v0.1.doc

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