Download - Dasar Optimasi GSM
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Dasar-Dasar Optimasi
Sistem Telekomunikasi GSM
Oman, Tembalang SMG, 18 Desember 2004
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ANTENNA CLEARANCE
Building
H
>= 2H
Shadow Area
Building
H
>= 2H
Shadow Area
Obstacle
2 m
2 m
Building
Average Building Height
(tinggi rata-rata tinggi
bangunan yg akan di
cover
! m lebih tinggi dari rata-rata tinggi bangunan Coverage Area
Oman, Tembalang SMG, 18 Desember 2004
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Building
Average Building Height
(tinggi rata-rata tinggi
bangunan yg akan di
cover
! m lebih tinggi dari rata-
rata tinggi bangunan Coverage Area
Area yg di "lan Area yg tidak
di "lan
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TEORI ANTENNA
Pattern, Gain
Pattern
- Horizontal Pattern
- Vertical Pattern
Hori#on$ o% o
% o
Vertical Beam Width
& db
& db
'o" iew
) o
Horizontal Beam W idth
& db
& db
i!a Vertical Beam Widthlebi"Besar#anHorizontal Beam Width lebi"Besar ma!aGain $g #i"asil!an lebi"Kecil
i!a Vertical Beam Width lebi"Kecil#anHorizontal Beam Width lebi"Kecil ma!a
Gain $g #i"asil!an lebi"Besar
Oman, Tembalang SMG, 18 Desember 2004
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TILT
1% &clectrical Tilt 'nilai Tilt #iat(r secara ele!troni!)
2% Mec"anical Tilt 'nilai Tilt #iat(r secara man(al #g menggeser antenna ses(ai
#g tilt $g #iingin!an)
&lectrical Tilt
1% Variable 'nilai Tilt #a*at #i(ba"-(ba")
2% +ie# 'nilai Tilt teta*)
&e! Tilt *a#a &lectronic Tilt #an Mec"anic Tilt
DOWN TILTNORAL
ELECTRICAL TILT
DOWN TILTNORAL
ECHANICAL TILT
Oman, Tembalang SMG, 18 Desember 2004
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Overshooting
Pancaran sin$al #ari antenna memancar segaris #g "orizon se"ingga sin$al memancar
se.a(" !(at sin$al $g #i*ancar!an 'ara" *ancaran sin$al ta! ter"ingga)
Overshooting Antenna beam
*ormal Antenna beam
Polarisasi /ntenna
1% Vertical Polar
2% Horizontal Polar
% ross Polar ' Polar)
Vertical Polar #anHorizontal Polar bai! #ig(na!an (nt(! #aera" 3(ral '#aera" $g
ti#a! *a#at *en#(#(!n$a*e#esaan) ta*iHorizontal Polar.arang #ig(na!an%
Cross Polar bai! #ig(na!an (nt(! #aera" 5rban '#aera" $g *a#at
*en#(#(!n$a*er!otaan)% Cross Polar mer(*a!an gab(ngan #ari Vertical and
Horizontal Polar.
Fast Fading a#ala" gangg(an $g menggangg( *ancaran sin$al 'ge#(ng, ben#a
bergera!)
Slow Fading a#ala" gangg(an $g menggang( saat sin$al #i*ancar!an #g *osisi
bergera! '#i #alam !en#araan)
Vertical Polar #an ross Polar ti*e *olarisasi antenna $g ban$a! #ig(na!an saat ini
(ertical +olar
antenna element
Hori#ontal +olar
antenna element
,ross +olar
antenna element
Oman, Tembalang SMG, 18 Desember 2004
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INDETI!I"A#I #EL
1% 6H '6ase ontrol "annel)
2% ell 7D 'ell 7#entit$)
% 6S7
4% M 'Mobile o(ntr$ o#e)
% M9 'Mobile 9et:or! o#e)
;% (enc$) MS menent(!an ser?ing cellber#asar!an 6H #an 6S7,
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NON HO%%IN$
',H ',HTR&' ',H S,,H ',HB,,H ',H',H
$ 2 & / ! 0 )
,HA**31 = 2
% '.43S1O'S
Base ,ontrol ,hannel
'ra5ic ,hannel
Signaling ,hannel 6 S4S
',H ',HTR&( ',H S,,H ',H ',H',H
$ 2 & / ! 0 )
,HA**31 = %
',H ',HTR&) ',H S,,H ',H ',H',H
$ 2 & / ! 0 )
,HA**31 = 22
',H
',H
Saat MS ter!one!si 'De#icate#) MS men#(#(!i #i T3 #a*at #i!eta"(i #engan
6H@12 /3+9@22
T31 @ 6H T3
T32 #an T3 @ TH T3
Pa#a 6H T3 *o:er selal( maim(m, *a#a TH T3 *o:er a!an ber?ariasi
'Po:er ontrol)
-0$ db
-)! db
TR&' TR&'
+ower 4a7imum
+ower
,ontrol
.13,all
Setu",onnected
#aat # mendudu*i Time+lot di BC CH TR&
Oman, Tembalang SMG, 18 Desember 2004
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-0$ db
-)! db
TR&' TR&(
+ower 4a7imum
+ower,ontrol
.13,all
Setu" ,onnected
#aat # mendudu*i Time+lot di TCH TR&
9ilai 7 @A #b 'arrier O?er 7ntererence)
9ilai /@A #b
Saat mela!(!an test T3, T/ 'Time /#?ance) @ 0 ata( 1
Oman, Tembalang SMG, 18 Desember 2004
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%OWER CONTROL
-)! db
-%$ db
Level , #ignal #trength
'ime
'ime
)
/
-ualit.
$
6&3@6it &rror 3ate
Oman, Tembalang SMG, 18 Desember 2004
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HO%%IN$
1% 6ase 6an# Ho**ing
2% S$nt"esize# +re>(enc$ Ho**ing 'S+H)
% 3+ Ho**ing '3+H)
Base Band Hopping
',H ',HTR&' ',H S,,H ',HB,,H ',H',H
$ 2 & / ! 0 )
A89,* = 2
',H ',HTR&( ',H S,,H ',H ',H',H
$ 2 & / ! 0 )
A89,* = /
',H ',HTR&) ',H S,,H ',H ',H',H
$ 2 & / ! 0 )
A89,* = 0
',H
',H
HS9 @ Ho**ing Se>(ence 9(mber
M/< @ 12, 14, 1;
M/7O @ Mobile /llocation 7n#e Oset
Synthesized Freqency Hopping !SFH"
',H ',HTR&' ',H S,,H ',HB,,H ',H',H
$ 2 & / ! 0 )
A89,* = 2
*on Ho""ing '8:
',H ',HTR&( ',H S,,H ',H ',H',H
$ 2 & / ! 0 )A89,* = /
Ho""ing '8:
4A1 = 2 0;2);2%;
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HANDOVER
9oteC HO ter.a#i saat MS ter!one!si '#e#icate#), *a#a saat i#le #iseb(t ell Selection
ata( ell 3eselection
Ter.a#in$a HO *a#a ell Ser?er #itent(!an ole"C
1% P6GT 'Po:er 6(#get)
2%
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Secara normal So(rce "ar(s s(#a" HO !e Target, !arena HO #i set *a#a le?el -A #bm
ma!a HO bel(m bias ter.a#i, !eti!a le?el signal strengt" menca*ai -A #bm So(rce
bar( HO !e Target
HO Layering (Umbrella dan FMMS)
5mbrella
Ter.a#in$a HO #ari sistem GSMA00 !e DS1800 #i tent(!an ole" nilai /5