ICT Cellular Network Planning 10-12-03

8/18/2019 ICT Cellular Network Planning 10-12-03

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Cellular Network Planning

ICT 10 December 2003

Usman Wadood

D.E. Traffic Analysis, Peshawar


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5ow Cellular Work!• 5ierarchy

" -6778T67786C77-6C

• Co,erage ro,i.e. by 8T6 9aka :86;

• -6 tune! into !tronge!t control channel

•


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Trunking A((iciency

8an. =llocation in =-P6

System A System B825!"

8#5

!"

8$%

!"

System A System B

8&%

!"

',2,(,# ))).). *** +oice channels

('( ((( control channels

- -

',2,(,# ))).). *** +oice channels

((# (5# control channels

- -

U/lin0 1S to BS Downlin0 1BS to S

30B5 6acing 30B5 6acing 30B5 6acing 30B5 6acing


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Trunking A((iciency• 8an. allocation in 6-

uar. 8an. re

Carrier re 1

Carrier re 12&

Carrier re #

Carrier re #0

%$0 -5

$1# -5

link

$3# -5

$+0 -5

Carrier re #0 7 &

Ufone

Downlink Un3sed

o4ilin0

•

'2#

•

•

•

'

2

' 2 $( # 5 * 8

TD-= !tructure o( each channel

$3# -h

$+0 -h


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CD-=2000 Tyical 8an. =llocation!

5 wideband

carriers with 625 kHz

guard band

3 wideband

carriers and additional

IS-95 carriers

1 wideband

carrier with 625 kHz

guard band

20 MHz

15 MHz

5 MHz

CD-=2000 allow! the (ollowing


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CD-= 8an. Planning• Co7e)i!tence o( 12# -5 an. 3# -5 gi,e! better ban. acking

• 12# -5 at e.ge o( (reuency block re.uce! !uriou! emi!!ion! ina.4acent block!

Allocated Block 3x Carrier Deployment

5 MHz 1 x 3!5 "arrier # $uard %and

1& MHz 2 x 3!5 "arrier # 1 x 125 "arrier #

$uard %and

15 MHz 3 x 3!5 "arrier # 2 x 125 "arrier #$uard %and

2& MHz ' x 3!5 "arrier # 3 x 125 "arrier #

$uard %and

or

5 x 3!5 "arrier # $uard %and


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Trunking A((iciency

DA s/read s/ectr3m

;

67

Data Si9nal

P6 ode

73t/3t

7:P ;Di9ital Si9nal P6 ode<

hi/

Time

P6 ode and how it s/reads data for a s/readin9 factor of 5

Data Bit Time


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Trunking e((iciency• -obile =!!i!te. 5an.o(( 9-=5>;

" har. han.o(( " u!e. in 6-@ D=-P6 an. CD-=

" mobile !tation 9-6; a!!i!t! in han.o((

• 6o(t 5an.o((

" u!e. in CD-= " -6 recei,e! control channel in(ormation (rom neighbouring cell!

" han.o(( i! initiate. (rom one cell to another without change in(reuency an. i! controlle. by -6C

" the a!!ociate. han.o(( i! calle. !o(t han.o(( " CD-= !y!tem! u!e a combination o( !o(t an. har. han.o((!


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ra.e o( !er,ice 9o6;

• :euire. gra.e o( !er,ice " !ually 2* blocking robability .uring bu!y hour Thi! mean!that .uring the bu!y hour@ 2 out o( e,ery 100 call! woul. be

blocke. .ue to conge!tion

" 8u!y hour may be 91; bu!y hour at bu!ie!t cell 92; !y!tem bu!y

hour 93; !y!tem a,erage o,er all hour!• A!timate. tra((ic .i!tribution

" Tra((ic inten!ity i! mea!ure. in Arlang 9mathematician =BArlang;

" >ne Arlang E comletely occuie. channel@ eg@ a ra.io channeloccuie. (or 30 min er hour carrie! 0# Arlang

• o6 !igni(ie! the likelihoo. that a call i! blocke. or i!ueue. (or more than the .e!igne. time


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ra.e o( 6er,ice F ContG.

• Arlang 8 (ormula i! u!e. (or non7ueuing !y!tem!an. i! gi,en by

where C E number o( channel!

= E tra((ic inten!ity

Pr9blocking ; = A

C HC

Ak H k k =0

C

∑


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Jueue. Trunking 6y!tem

• Arlang C (ormula i! u!e. to (in. o6 in ueue. trunke.!y!tem!

• = ueue i! ro,i.e. to hol. blocke. call!

• Pr 9.elay; E =C C71 =CKC917=HC; ∑ =k Hk

kE0

• Arlang 8 an. Arlang C (ormulae are u!e. to .etermine

imortant network arameter! !uch a! ma)imum numbero( u!er! (or a gi,en o6 an. number o( channel!


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Arlang 8 rah


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Arlang C rah


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= ractical e)amle

in. ma)imum number o( u!er! that can be !uorte. (or a0#* blocking robability i( connecte. trunk! are100

=!!ume each u!er generate! 01Arl tra((ic

6olutionLTra((icH!ub! =u E 01 Arl' Trunk! C E 100' o6 E 0# *!er! E =H=u' where = i! tra((ic inten!ity (or a gi,en o6

rom grah we can !ee that = (or 0# o6 an. 100 trunk!eual! %0$6o E %0$H01 E %0$ u!er!

or ractice reeat the abo,e e)amle (or • CE20' o6 E 2*@ =u E 02 Arl

• CE#0@ o6 E 01*@ =u E 02 Arl


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reuency Planning

6 E total channel! within a clu!ter

k E total channel! within a cell

N E cell! within a clu!ter

6 E kN 9i( (reuencie! are not reu!e.;

• I( clu!ter i! relicate. - time!@ then C@ total channel! in the !y!tem igi,en by

C E -kN E -6

• 6mall clu!ter !ie77more clu!ter! an. more co7channel inter(erence

• reuency reu!e (actor i! gi,en by 1HN


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l i i D-= .


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reuency lanning in D-= an.

TD-= !y!tem!• Thing! to con!i.er

• !ar!e ra.io !ectrum

• Mu.iciou! a!!igning o( ra.io channel!

• inter(erence

• J E DH: where J i! co7channel reu!e ratio

• 6HI E 9DH:;nHio E 993N;1H2;n

io• where D E .i!tance between centre! o( neare!t co7channel cell!' : E

ra.iu! o( a cell' n E ath lo!! e)onent

• Thi! 6HI euation i! (or (ir!t layer o( inter(ering cell! i( allinter(ering ba!e !tation! are eui.i!tant (rom .e!ire. ba!e !tationan. thi! .i!tance i! eual to the .i!tance D between cell centre!


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=

=

=

=

=

=

)

DK:

DK:

D7:

D7:

D

D

: =

:

• -6 at cell e.ge (ace! wor!t 6I:

• -6 i! D7: .i!tance (rom 2 neare!tcell!

• rom other cell!@ it i! at a .i!tance o(DK:H2@ D@ D7:H2@ DK:@ D7:

• The .iagram i! a !imli(ie. aroach

: 7&

29D7:;7&K29DK:;7&K2D7&

• In term! o( J

1

29J71;7&K29JK1;7&K2J7&

• or a cell clu!ter@ JE93N;1H2 E &+an. wor!e ca!e 6HI i! &$#+ or 1 .8

• I( 6HI1% .8@ then a $ cell clu!ter i!con!i.ere.@ hence .ecrea!ing caacity

• Co7channel inter(erence thu!.etermine! ca acit o( a ! !tem

6HI E

6HI E


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• =bout #* o( mobile !ectrum i! taken by

control channel! an. $#* i! taken u by ,oice

channel!• >nly one CC i! nee.e. within a cell

• Channel a!!ignment .een.! uon

roagation con.ition!@ terrain@ number o(u!er! etc

• Thi! hol.! true (or =-P6 an. 6-


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A)amle = cellular !y!tem reuire! 1# .8 (or !ati!(actory er(ormance in.

(reuency reu!e (actor 9J; an. clu!ter !ie 9N; 6uo!e ath lo!!

e)onent 9n; E 3

6olutionL

Con!i.er cell reu!e' N E

6HI E 9DH:;nHi0 E 1H+ 993);1H2;3 E 1+0& or 120# .8

6ince 6I: 1# .8@ the ne)t higher reu!e lan i! con!i.ere.

which i! $ cell reu!e 6HI !till ha! ,alue le!! than 1# .8@ !o the

ne)t higher ,alue o( N i! trie. 9i E 2' 4 E 2;@ which gi,e! a

,alue o( 6I: E 1H+ ) 9+;3

E 3+ or 1##+ .8

Thi! i! greater than the minimum reuire. 6I: an. !houl. beu!e.


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=-P6 reuency Planning1A 2A 3A 4A 5A A 7A 1B 2B 3B 4B 5B B 7B 1C 2C 3C 4C 5C C 7C

1 2 3 4 5 7 ! 9 10 11 12 13 14 15 1 17 1! 19 20 21

22 23 24 25 2 27 2! 29 30 31 32 33 34 35 3 37 3! 39 40 41 42

43 44 45 4 47 4! 49 50 51 52 53 54 55 5 57 5! 59 0 1 2 3

4 5 7 ! 9 70 71 72 73 74 75 7 77 7! 79 !0 !1 !2 !3 !4

!5 ! !7 !! !9 90 91 92 93 94 95 9 97 9! 99 100 101 102 103 104 105

10 107 10! 109 110 111 112 113 114 115 11 117 11! 119 120 121 122 123 124 125 12

127 12! 129 130 131 132 133 134 135 13 137 13! 139 140 141 142 143 144 145 14 147

14! 149 150 151 152 153 154 155 15 157 15! 159 10 11 12 13 14 15 1 17 1!

19 170 171 172 173 174 175 17 177 17! 179 1!0 1!1 1!2 1!3 1!4 1!5 1! 1!7 1!! 1!9

190 191 192 193 194 195 19 197 19! 199 200 201 202 203 204 205 20 207 20! 209 210

211 212 213 214 215 21 217 21! 219 220 221 222 223 224 225 22 227 22! 229 230 231

232 233 234 235 23 237 23! 239 240 241 242 243 244 245 24 247 24! 249 250 251 252

253 254 255 25 257 25! 259 20 21 22 23 24 25 2 27 2! 29 270 271 272 273

274 275 27 277 27! 279 2!0 2!1 2!2 2!3 2!4 2!5 2! 2!7 2!! 2!9 290 291 292 293 294

295 29 297 29! 299 300 301 302 303 304 305 30 307 30! 309 310 311 312 " " "

313 314 315 31 317 31! 319 320 321 322 323 324 325 32 327 32! 329 330 331 332 333

" " " " " " " " " " " " " " " " " " 7 ! 9

70 71 72 73 74 75 7 77 7! 79 !0 !1 !2 !3 !4 !5 ! !7 !! !9 90

91 92 93 94 95 9 97 9! 99 700 701 702 703 704 705 70 707 70! 709 710 711

712 713 714 715 71 " " " " 991 992 993 994 995 99 997 99! 999 1000 1001 1002

1003 1004 1005 100 1007 100! 1009 1010 1011 1012 1013 1014 1015 101 1017 101! 1019 1020 1021 1022 1023

• reuency lanning (or !i.e = o( %32 channel =-P6

• Channel! 313 7 333 are CC@ channel! 17312@ ++71+@ $$171023 are


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=-P6 reuency Planning

• Aach :86 can ha,e u to # channel!

• The :86 woul. contain !ub!et! 1=@ 18 an. 1C

• Aach !ub!et ha! 1$ channel!@ total channel! in :86 E 1$ )

3E#

• 6earation between channel! o( a !ub!et E min 21 channel!• 6earation between !ub!et! in an :86 E channel! (or a cell

reu!e attern

• :86! utili!e (reuencie! o( i=@ i8@ iC@ where ,alue o( i E 1 to


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reuency lanning in CD-= F ContG.

• I67$# ha! a total a,ailable ban.wi.th o( 2# -5 (orulink an. 2# -5 (or .ownlink

• 12# -5 910* o( a,ailable ban.wi.th (or one!y!tem; ra.io channel i! u!e. (or !imultaneou!

tran!mi!!ion! o( 1 CC an. u to +&


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• I( number o( u!er! increa!e beyon. a certainle,el@ there may be an abrut increa!e in

.roe. call!• -ore u!er! mean .egra.e. er(ormance

• Power le,el! an. thre!hol.! (or


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CD-= !eci(ic beha,iour

• (1H(2 cell lanning

" neare!t cell! u!e .i((erent ra.io (reuencie!

" imlemente. where inter(erence i! e)erience.

" u!e. (or har. han.o((!

• 6o(t han.o((

" -6C monitor! -6 (rom two or more ba!e !tation!

" the !tronge!t channel i! automatically allocate. to -6

without a change in (reuency


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• Near ar A((ect

" reci!e ower control (or each u!er " ower (rom each u!er !houl. be eual at ba!e !tation I( not@ near (ar e((ectoccur!

" generally !tronger !ignal at :) .rown! weaker !ignal!

" thi! i! a,oi.e. by !en.ing ower change comman.! o,er the (orwar. ra.io link

to all mobile! " each -6 ro,i.e! the !ame !ignal le,el to the ba!e !tation :) an. near (ar

e((ect i! a,oi.e. (rom mobile! within a cell

" howe,er@ out o( cell mobile! may cau!e near (ar e((ect

• 8reathing Cell

" .ynamic@ time ,arying@ u!er .een.ent cell boun.arie!

CD-= !eci(ic beha,iour F ContG.


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An. o( Part I

Documents

ICT Cellular Network Planning 10-12-03