3G Transmisson Planning
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Transcript of 3G Transmisson Planning
8/17/2019 3G Transmisson Planning
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Company Confdential
Planning Tasks
Transmission Planner is seeking answers to questions like:
• How much transmission capacity is required per BTS at a given time
• How many !"C#s are required
• How many BTS per each !"C
• $hich BTS on which !"C
• $hat other H$
• How to confgure it all
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Company Confdential
Dimensioning
!% dimensioning will result in:
• "um&er o' BTS#s• BTS confgurations (e)g) *+*+*,-+-+-.
Transmission dimensioning tasks include usually:
• /u& dimensioning
• /u0CS,PS dimensioning
• /ur dimensioning
• !"C dimensioning
1i2erent approaches
• Tra3c &ased
• H$ &ased
• 4ther
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Company Confdential
Trafc Based Dimensioning
56ample
Tra3c num&ers:• *777 su&scri&ers per BTS
• 89 *+*+* BTS#s
• Tra3c per su&scri&er
oice (;<! *-)-. = >9 m5rl
ideo (?1/ @A. = *7 m5rlPS 1ata ("!T PS >A. = @7 <&ytes,<onth
* call attempts during &usy hour per su&scri&er
1e'aults:
• Blocking pro&a&ility -D /u& 7)*D other• So't Handover %actor A7D
• -9 1ays per <onth
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Company Confdential
What is “Sot Handover”?
Soter HO(!"#
Sot$Sot HO(!"#
Soter$Sot HO(! "#
Sot HO (%!"#
Sot HO OH &'%!"%'!"
'!"&)*"
Site*
Site-
Site>+O HO
(!*"#
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Company Confdential
Trafc Based Dimensioning
/u& dimensioning
Steps*) Calculate total CS tra3c in 5rl per BTS)
-) 1efne num&er o' channels 'or total CS tra3c)
>) Calculate CS oice and CS 1ata &it rates per BTS)
A) %ind out PS data rate per BTS)
9) Calculate Common Control Channel (CCCH. capacities)
@) Calculate 1edicate Control Channel (1CCH. capacities)
8) Calculate signaling capacities)
) ;dd 4E< capacity)
F) Sum all)
AMR 12.2
UDI 64
PS 384
CCCH
DCCH
SIG
O&M
Iub tot
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Company Confdential
Trafc Based Dimensioning
*) Calculate total CS tra3c in 5rl per BTS)
(4/C5,su& + CS 1;T;,su&. G num&er o' su&scri&ers ,BTS = CS total
(>9 m5rl + *7 m5rl. G *777 = A9 5rl
-) %ind out channels 'or total CS tra3c)
Channels required = 9@ ch
SH4 A7D
Hence 9@ ch G *)A = 8F ch
AMR 12.2
UDI 64
PS 384
CCCH
DCCH
SIG
O&M
Iub tot
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Company Confdential
Trafc Based Dimensioning
>) CS oice and CS 1ata &it rates per BTS
• %ind out channels 'or ;<! *-)- oice
(>9m5rl,A9m5rl.G8F ch#s = @- ch#s
• Calculate &it rate
@- G *9 k&ps = F>7 k&ps
B?T $H *9 k&ps
AMR 12.2 930
UDI 64
PS 384
CCCH
DCCH
SIG
O&M
Iub tot
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Company Confdential
What is ,T- ?
;synchronous Trans'er <ode
Connection0oriented transport in virtual circuits paths and channels
;T< is a cell relay technology and uses f6ed siIe P1?#s
Based on f6ed length packets i)e) Cells
Cells are generated continuously &y an ;T< multiple6er
;llows Je6i&le &andwidth allocation in transmission media
<i6ture o' services with di2erent &andwidths can &e handled &y acommon network
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Company Confdential
,T- .ell / Header and Pa0load
9 &ytes A&ytes
Pa0load
Header
! B0tes
)1 B0tes
2irt3al.hannel4denti5er
6 7 ! ) 8 % *
Pa0loadT09e
4denti5er
.:P
;eneric<lo= .ontrol
2irt3al Path4denti5er
2irt3al Path
4denti5er
2irt3al
.hannel4denti5er2irt3al .hannel
4denti5er
Header >rror.heck
Pa0load()1 0tes#
! B0tes
)1 B0tes
2irt3al.hannel4denti5er
6 7 ! ) 8 % *
Pa0loadT09e
4denti5er
.:P
2irt3al Path 4denti5er
2irt3al Path
4denti5er
2irt3al
.hannel4denti5er2irt3al .hannel
4denti5er
Header >rror.heck
Pa0load()1 0tes#
,T- @+4.ell
,T- ++4.ell
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Company Confdential
Tranmission Path
2irt3al Path
(2P#
2irt3al.hannel
(2.#2irt3al Path(2P#
,T- .ells
,T- .ells
,T- Header
Pa0load
Tranmission Path
2irt3al Path
(2P#
2irt3al.hannel
(2.#2irt3al Path(2P#
,T- .ells
,T- .ells
,T- Header
Pa0load
C/ , P/ %ield%unctions
• Switching /dentifers
• !outing
• <ultiple6ing
• Bandwidth
The conce9t o virt3al channels and virt3al9aths
/dentifers
• C/ identifes a irtual Channel
Connection• P/ identifes a irtual Path
Connection
• Transmission Path could &e P1H orS1H
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Company Confdential
;daptation;daptationKayerKayer
;T<;T<KayerKayer
PhysicalPhysicalKayerKayer
Conversion toConversion to;T< 1ata;T< 1ata
Types A0 Types A0Byte KengthByte Kength
%orward Cell%orward Cell Through Through"etwork"etwork
;dd 90Byte;dd 90ByteHeaderHeader
Convert ToConvert ToCorrectCorrect
5lectrical 4r5lectrical 4r
4ptical4ptical%ormat%ormat
oiceoice
CellCell
1ata1ata
CellCell
ideoideo
CellCell
Services
;;
,T- .ell .reation
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Company Confdential
,T- ,da9tation :a0er % (,,:%#
• 4ne ;;K- cell Jow consists o' varia&le length Lmini0cellsL that are concatenated asa continuous stream into the A0&yte payload areas o' ;T<0cells
• 4ne ;;K- Jow can carry up to -A channels which are multiple6ed &y insertingchannel data into mini0cell payloads
• The Lmini0cellsL are o3cially called CPS0packets (Common Part Su&layer. E aredivided into packet header (PH. and packet payload (PP. parts
• <ini0cells have a Lmini0headerL (CPS0PH. to identi'y the channel and length o' themini0cell
• <ini0cell payload siIe can &e anything 'rom * to A9 &ytes• Channels can &e multiple6ed in any order desired mini0cells can cross ;T<0cell
&oundaries cells can &e padded
• ;ll ;;K- ;T<0cells &egin with a start feld which indicates the o2set to *st completemini0cell within the ;T<0cell
;;K- ;T<0cell Jow
Cell payloadCell header
Channel > Jow
Start feld CPS0PH CPS0PP
Channel * Jow
Channel - Jow
42set to ne6t CPS0P1?
Mero padding
Crossing cell&oundary
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Company Confdential
,T- ,da9tation :a0er ! (,,:!#
• ;;K9 ;T< ;daptation layer is designed to carry 'ast streams o' longer packets over
;T< as simply as possi&le• ;;K9 doesnNt provide any multiple6ing itsel' it is assumed that the packets carried
identi'y themselves to higher protocol layers (like TCP,/P.
• ;;K9 is also known as S5;K (Simple 53cient ;daptation Kayer.
• Packets are simply segmented into A0&yte 'ragments o' ;T<0cell payloads the lastcell is padded and terminated with ;;K9 trailer o' &ytes
• ;;K9 trailer indicates packet length E has >-0&it C!C
• Packets can &e up to @A O&ytes and are aligned to cell &oundaries
• The last cell o' a packet is indicated &y setting the PT7Q &it in cell header
Packet R*
cell R* cell R-
Cell payload
Cell header
Packet R-
cell R> cell RA
Mero padding
;;K9 packet trailer
? ?
C P /
C ! C 0 > -
l e n g t h
Crossing cell&oundary
;;K9 packet trailer
Mero padding
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Company Confdential
-a99ing to ,T-
• <apping user data to ;T< ;;K- cells results as 'ollows in k&ps:
service Iub cap RNC cap
AMR 12.2 15 16.4
UDI 64 77 69.6
PS64 80 72.4
PS128 162 140PS84 487 409.6
AMR 12 2 930
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Company Confdential
Trafc Based Dimensioning
>) CS 1ata Bit !ate
Channels 'or CS 1ata = (*7 m5rl,A9 m5rl. G 8F ch#s =* ch#s
* ch#s G 88 k&ps = *>@ k&ps
A) PS 1ata !ate
!ate per su& (7G*7-A777G.,(@7G@7G*-G-9. = AA9&ps,su&
Su&scri&ers G !ate Per Su& G SH4 = !equired Capacity
*777GAA9G*)A = @>8 k&ps
Channels 'or PS data = @>8,>A = *)@@ ch#s = - ch#s-GA8 = F8> k&ps
AMR 12.2 930
UDI 64 1386
PS 384 973
CCCH
DCCH
SIG
O&M
Iub tot
service Iub cap
AMR 12.2 15
UDI 64 77
PS64 80
PS128 162
PS84 487
AMR 12 2 930
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Company Confdential
What are “...H A D..H”?
...H & 87 k9s ,T- OH & )! k9s
>ach sector needs one set o ...H/ so or a +odeB =e add)8! k9s to the 3ser trafc
• +oteC 4n ,+*) this val3e is aro3nd %! k9s (and ...Hcons3mes 7 .4Ds instead o %#
.ontrol channels in the @ser Plane
.ommon control channels (...H#
<,.H$@ & 87 k9s<,.H$. & 87 k9s,.H & 887 k9sP.H & 1 k9s
AMR 12.2 930
UDI 64 1386
PS 384 973
CCCH 435
DCCH
SIG
O&M
Iub tot
AMR 12 2 930
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Company Confdential
What are “...H A D..H”?
Dedicated control channel (D..H# or each active 3ser connection
D..H & 8) k9s
D..H & 8) k9s ,T- OH & 7! k9s
<or each active connection =e add 7! k9s to the 3ser trafc
+oteC 4n ,+*) this val3e is 87 k9s/ 3t =ith lo=er activit0 actor d3e to ,:.
D..H consist o':
• @- ;<!
• * ?1/
• - PS
• Total - connections @9 k&ps = 9>> k&ps
AMR 12.2 930
UDI 64 1386
PS 384 973
CCCH 435
DCCH 533
SIG
O&M
Iub tot
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Company Confdential
Trafc Based Dimensioning
•?ser Plane (?P. AMR 12.2 930
UDI 64 1386PS 384 973
CCCH 435
DCCH 533
4257
SIG
O&M
Iub tot
Conversion to 5*: A-98k&ps , *F-7 kp&s = -)-* 5* = > 5*$hy *F-7 k&ps
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Company Confdential
;T< over P1H
• P1H 'rame structure 'or -7A k&ps isdescri&ed in /T?0T )87A
• To transmit ;T< tra3c over an 5* linkthe ;T< cell is segmented)
• Segments are mapped &it &y &it into TS7*0*9 and TS *80>* and transmitted inthe timeslot structure o' an PC< 'rame
• Time slots 7 is used 'or synchronisation
• 4ptionally TS *@ can &e used also 'or;T< tra3c) This requires a parametersetting in ;UC and !"C)
V0 Bits * to 0WBit Bit 1
Bit E Bit 7
Bit % Bit %1
Bit %E Bit 87Bit 86 Bit ))
Bit %)E Bit %!7
, v a i l a ? l e f o r , T -
c e
l l , v a i l a ? l e f o r , T - c e l l
TS
TS *
TS 8*
TS 8
V0Tim
eslots(TS.
7
to>*
0W
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Company Confdential
,T- ca9acit0 o an > rame
"um&er o' &ytes with ;T< payload is >7 in a 'rame%rame repetition rate is *,*-9 us)>7 &ytes,*-9 us = -A7 777 &ytes,s4ne ;T< cell has 9> &ytes,cell )
The ,T- trafc ca9acit0 in a % -9s rame is%)****F!8 & )!%1 c9s or
8* ts G 1 it G 1*** & E%**** itsFs & E%* k9s
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Company Confdential
Signalling
Signalling rates are calculated 'rom ?ser Plane (;;K-?P. capacity:
• > 5* > G *F-7 k&ps = 98@7 k&ps
• /<; 4H 98@7 G FF*8 = 98*-k&ps
• /u& P ma6 98*- k&ps , (9> G &its. = *>A8- cps
• Signalling (@D. *>A8- G @D = 7 cps
• 4E< (?B!. *9* cps = @A k&ps ("okia recommendation.
• !emaining 'or ?P0C (*>A8- X 7 0*9*. cps = *-9*> cps
$hat is /<;Signalling consists o' what
4-, 4 - lti l i ,T-
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Company Confdential
4-, 4nverse -3lti9le'ing or ,T-
1
2
N
N 2 1
1
2
N
N 2 1
a
b
IMA IMA
!" #irec$i%& ce''s
#is$ribu$e# acr%ss
'i&(s i& r%u&#
r%bi& se)ue&ce
• Several physical 5* links can &e com&ined to one higher&andwidth logical inter'ace known as /<; roup
• /nverse <ultiple6ing 'or ;T< (/<;. splits an ;T< cell stream overmultiple physical links and com&ines the original stream at the'ar0end 'rom these links
• ;n /<; %rame consists o' num&er o' consecutive cells (<.transmitted on each link within the /<; group (< can &e >- @A*- or -9@) "okia de'ault: *-.
R" #irec$i%& ce''s
rec%*bi&e# i&$%
si&+'e A!M s$rea*
i& sa*e se)ue&ce
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Company Confdential
4-, $ and=idth eIects d3e to 4-,
""+*
"+-
"+>
""+*
"+-
"+>
-3lti9le 9h0sical links each with Peak Cell !ate A9- cps
4-, gro39/ one logical link
"+-
"+*
"+
>
"
I!t"#$a" I!t"#$a" No%&!a' (&t )#a!*$"# (&t Rat" IMAU!&t )+," Rat" -Mb&t.*/ -Mb&t.*/ Pa#a%"t"# M
,!1 1-544 1.56
/1 2-048 1.920
& 1-487274 2
IU8P1 N,!1 IMA & 1-544 & 1-511262 64
& 1-52256 128
& 1-52925 256
& 1-859092 2
&/1 IMA & 2-048 & 1-889078 64
& 1-904070 128
& 1-911567 256
,!2 6-12 6-144
IU4P2 & 5-57728 2
&,!2 IMA & 6-12 & 5-6672 64
P%s$p%&e# & 5-71221 128
& 5-7470 256
IUS S!M0 51-840 48-84
S!M1 155-520 149-76
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Company Confdential
Signalling• ;;K-sig: Transport "etwork Control Plane (Signalling 'or ;;K- connections.
• 5sta&lishing ;;K- connections
• <aintaining o' the ;;K- connections
• Terminating o' ;;K- connections• 5rror checking
• Carrying signalling 'or lower ;T< adaptation layer (S;;K0?"/ S;;K0""/.
• C0"B;P: The main loading components o' Common "B;P links are:
• !adio Kink setup requests and responses
• !adio !esource /ndication messages
• Thus C0"B;P &andwidth requirement depends on the call setup and radio link addition (so'thandover. amounts and the !adio !esource /ndication period
• 10"B;P: 1edicated "B;P (10"B;P. trans'ers 'or e6ample:
• !adio Kink <easurement !eports (!K<.
• !adio Kink 1eletion commands
• !adio Kink !econfguration messages
• !adio Kink &ranch addition commands (so'ter handovers.• Thus the 10"B;P capacity requirement depends 'or e6ample on the num&er o' calls call
lengths num&er o' so'ter handovers and !adio Kink <easurement report period)
AMR 12.2 930 b,*
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Company Confdential
Signalling .$+B,P/ D$+B,P A ,,:%S4;AMR 12.2 930 b,*
UDI 64 1386 b,*
PS 384 973 b,*
CCCH 435 b,*
DCCH 533 b,*
4257 b,* 1251 cps
SIG 342 b,* 808 cps
O&M 64 b,* 151 cps
Iub tot 4663 b,* 1472 cps
The distri&ution o' signalling capacities 'or C0"B;P 10 "B;P and ;;K-sig is the ratio o' *:-:*)
• C0"B;P
7 cps , A = -7- cps
• 10"B;P
7 cps , - = A7A cps
• - ;;K-sig
7 cps , A = -7- cps
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Company Confdential
es3lts
AMR 12.2 930 b,*
UDI 64 1386 b,*
PS 384 973 b,*
CCCH 435 b,*
DCCH 533 b,*
4257 b,* 1251 cps
SIG 342 b,* 808 cps
O&M 64 b,* 151 cps
Iub tot 4663 b,* 1472 cps
?ser Plane requires A-98 k&ps =
*77A7 cps
$e have *-9*> cps availa&le = 4O
/u& requires A@@> k&ps = *7FF8 cps
$e have *>A8- cps availa&le = 4O
"e6t step could &e to esta&lish atra3c profle which is used directly in;UC#s S0;UC#s E !"C#s)
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Company Confdential
Partial Trafc Pro5le
Iub P 121 cps
AA32UP 1251 cps
AA32SI 202 cps
CNAP 202 cps
DNAP 404 cps
"ote that 4E< capacity is not included
in this fgure due to the confgurationprinciple that 4E< is ?nspecifed Bit!ate tra3c (?B!. while ?ser Plane andsignalling is Constant Bit !ate (CB!.tra3c)
This allows 4E< tra3c to use any
remaining capacity in the link inaddition to it#s reserved capacity whichis *9* cps)
4 Di i i > i
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Company Confdential
43 Dimensioning >'ercise Tra3c num&ers:
• 977 su&scri&ers per BTS
• 89 *+*+* BTS#s
• Tra3c per su&scri&er
oice (;<! *-)-. = *7 m5rl
ideo (?1/ @A. = 9 m5rl
PS 1ata ("!T PS >A. = >7 <&ytes,<onth
1e'aults:
• Blocking pro&a&ility -D• So't Handover %actor A7D
• -9 1ays per <onth
• Signalling 8)-D
To do: 5sta&lish required /u& P ;;K-?P ;;K-Sig C0"B;P and 10"B;Pcapacities)
S l ti
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Company Confdential
Sol3tionCS %ice 10 mErl CCCH 145 kbps
CS Da$a 5 mErl DCCH 215.8 kbps
CS $raic !%$a' 15 mErl
UP #". 1627.08 kbpsCa&&e's 2 ch's
S 40: 2.2 ch's P #". tot 4114 cps
;M 151 cps
C<s CS %ice 25.76 ch's *u% 4265 cps
(t #at" CS o" 386.4 kbps 1* 0.94
Rou!u, 1CS Da$a c<s 6.44 ch's
CS Data bt #at" 495.88 kbps S!a''! 15 cps
CN(AP 79 cps
PS Da$a ra$e 227.55556 bps/sub DN(AP 158 cps
Capaci$= 159.28889 kbps AA2S 79 cps
c<s 0.4 ch's
R%u&#up 1 ch's AA2UP 4062 cps
Rat" 384 kbps P 1 477 cps
Base station areviations
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Company Confdential
Base station areviations
• $;%: ;ntenna %ilter) Com&ines and isolates TU,!U signals and amplifesreceived signals)
• $P;: Power ;mplifer) ; multicarrier amplifer with an operating &andwidth
o' any -7 <HI section on whole @7 <HI $C1<; allocation)• $T!: $C1<; Transmitter and !eceiver ?nit) Consists o' a transmitter and
two receivers)
• $S<: Summing and <ultiple6ing ?nit) Sums TU signals 'rom signalprocessing units or other $S<s)
• $SP: Signal Processing ?nit) Per'orms !U and TU code channel processing
coding and decoding 'unctions)• $;<: ;pplication <anager) Per'orms 4E< 'unctions and carrier control)
• /%?: Transmission /nter'ace ?nit) Connects the BS to transmission networkor to co0sited S<,515 BTS)
• ;U?: ;T< Cross0Connect ?nit) Connecting element &etween $;< and /%?s);U? can handle ;T< cross0connections at a transmission network level)
• $SC: System Clock) Per'orms synchroniIation 'unctions and re'erence clockgeneration to the $C1<; BS)
Transmission 3nits =ithin +odeB cainet
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Company Confdential
IF!IF!IF!
"#!
$ %
& $%'
>A>!R
>PA
$%'
>A>!R
>PA
$%'
>A>!R
>PA
$"'
$"'
$(I
"#!
IF!
$%(
$%(
I)*
>A>!R
>PA
>A>!R
>PA
>A>!R
>PA
$ %
&
$ %
&
$"'
W S . J %
,K @ J%
4<@ J)
!%
W,-FS3rack selectionC•Basic rule is to distri&ute tra3c on availa&le $SPs
• Tra3c is distri&uted 'rom !%0pool to $SP cards
•* su&rack can have up to - $;<s
•* $;< handles up to > $PS
WSP con5g3ration de9ends onC• 56pected tra3c mi6
• 4perator policy (trade o2 &etween e3ciency E security.
• "odeB type
/nteresting 'or Transmission: WSP/W,-/ ,K.
Dimensioning WSP cardsSPA SPC SPD SP
8/17/2019 3G Transmisson Planning
http://slidepdf.com/reader/full/3g-transmisson-planning 32/33
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Company Confdential
Dimensioning WSP$cards
• CCCH: > (sectors. = *@ HwCh
• ;<!: @- (;<!. 6 * (Channel,;<!. = @- HwCh
• CS 1ata: * (?1/. 6 A (Channel,?1/. = 8- HwCh
• PS 1ata: - ("!T PS >A. 6 *@ (Channel,PS "!T *-. = >- HwCh
$e have to make sure that the $SP HwCh capacity in the "ode Bis &igger than: *@ + @- + 8- + >- = *A HwCh
5ach $SP0C provides @A H$Ch there'ore we go with > $SP0C
having a total capacity o' *F- H$Ch)
;s input we have a BTS in *+*+* confguration
H :a!!"'* 2 64 2 16
HW Based Dimensioning
8/17/2019 3G Transmisson Planning
http://slidepdf.com/reader/full/3g-transmisson-planning 33/33
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Company Confdential
HW Based Dimensioning
• /t can &e roughly estimated that per $SP0C * 5* is needed
• ;ll shown tra3c mi6es e6ceed the availa&le ?P0CC capacity &y >0*-D &ut it is pretty unlikelythat all availa&le Channel elements o' the $SP cards are used completely