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


/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



Company Confdential


*) 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



Company Confdential


>) 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



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



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



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



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



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



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



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



Company Confdential


>) 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



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



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


•?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



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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



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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

3G Transmisson Planning

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