multi band optimization

7/21/2019 Multi Band Optimization

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Multi-band NetworksOptimization

Which Multi-Band Confguration is suitable or Sudani

!repared b" #'()(*+ *



• !rinciples o 4ual band network%• Scenarios o implementing dual band

networks%

• Moti5es to optimize dual band network%

,ntroduction

!repared b" #'()(*+ 2



• ,n most o 6SM networks world wide 788Band was frst used 9 then due to capacit"bottlenecks on 788 band 9 *:88 band wasadded later%

• *:88 co5erage is weak 95er" similar to 26co5erage because o close re$uencies/little stronger1%

• Most o mobiles in market support bothbands 788(*:88%

,ntroduction

!repared b" #'()(*+ '



• 4ual band Networks can be used in

multiple scenarios#*% Multi-.a"er scenario with priorit" to *:88

,ntroduction

!repared b" #'()(*+ +

*:88*:88 *:88 *:88

788 788 788 788



• ;riggers o Multi-band Optimization#

*% ;ra<c not distributed according toconfgured resources /;C0 Congestion 1

% ?ualit" o one band is bad compared tothe other band /4C= issue1%

2% S4CC0 congestion on one Band whileno S4CC0 tra<c on the other band%

'% ;oo man" drops during multibandhando5er /in concentric cell case1

,ntroduction

!repared b" #'()(*+ @



• Aeature !rinciples• !ros and Cons• Aeature tuning

• Aeature counters• !ractical 3amples

Multi-.a"er Confguration /0CSeature1

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• Aeature !rinciples#

• 788 Cells and *:88 Cells are separated intotwo .a"ers 9 where *:88 Cells ha5e higherpriorit" than 788 Cells%

• the MSs make calls on *:88 Cell as long as itsco5erage is acceptable9 when co5eragebecome 5er" bad 9 the mobile goes to 788 Cell9so most o tra<c is on *:88 .a"er%

• ,n ,dle mode most o MSs camps on 788 cellsbecause o its ecellent =le5 compared to*:88 9 to balance MSs in idle mode 9Cparameters are tuned to keep part o MSs

camping on *:88 Cells%


!repared b" #'()(*+ 7




• ;he priorit" settings dont impact the6!=S(3463 tra<c 9 we can balance the 6!=S3463 tra<c between the two bands using Creselection parameters%

• when MS initiate call rom 788 Cell 9 it willperorm inter-.a"er 0O to *:88 cell 9when the*:88 Cell co5erage degrade the MS perorm

3463 0O to 788 Cell%


!repared b" #'()(*+ *8




!repared b" #'()(*+ **

1800

900

Inter-Layer

HOEDGEHO




!repared b" #'()(*+ *

1800

Inter-Layer

HO

EDGE

HO




!repared b" #'()(*+ *2

1800

PBGTHO

PBGTHO



• !ros#

• ,n case the operator has cleaner 4CS band 9this eature will be ade$uate because most otra<c will be on 4CS9 the 4C= on network le5elwill be better%

• 3asier to control tra<c than concentric cell 9either b" ;ilting or b" !arameter change%

• Can use diDerent antennas 9 unlike concentriceature%

• Cons#• 3ach band is confgured in separate

cell 9 so more channels is needed orsignaling

• ;oo man" cells in air interace createroblems or o timization obs like


!repared b" #'()(*+ *'



• 0ando5er initiated because o diDerence in

.a"er e5en i neighbor =le5 is weaker%• ;riggering conditions#• ;his t"pe o hando5er is enabled 9

.3F0O3NGH3S

• One o the neighbors cells has higherpriorit" than ser5ing cells /higher priorit"-Iparameter .JH3= has lower 5alue1%

• ;arget Cell =le5IG0O;0=3SK

,N;3.3F0O0HS;-)'• !(N criteria or ,nter-.a"er 0O is satisfed%! parameter# .3F.JS;G)N parameter# .3FS;J;G'

• .oad on 788 cells eceed the threshold #.JH0O.OJ4;0

,nter-.a"er 0ando5er

!repared b" #'()(*+ *+



4.(L. 3d



• 3dge 0ando5er initiated because o bad

co5erage in either L. or 4.• ;riggering conditions#

• ;his t"pe o hando5er is acti5ated

A=,N630O3NGH3S%• 4. (L. =le5 o *:88 cell is less than4.3463;0=3S(L.3463;0=3S%

• 4. =le5 o 788 cell is greater than /ser5ing4l =le5 K,N;3=C3..0HS; -)'1%

• !(N criteria o 3dge 0ando5er is satisfed#! parameter# 3463.JS;*N parameter# 3463S;J;*

4.(L. 3dge0ando5er

!repared b" #'()(*+ *@

4.(L. 3d



4.(L. 3dge0ando5er

!repared b" #'()(*+ *:

900

1800

788 Cell Setting*:88 Cell Setting

A=,N630O3NGH3S4.3463;0=3SG8L.3463;0=3SG*

+3463.JS;*G'3463S;J;*G)

!er neighbor

,N;3=C3..0HS;G)@3463J4.JS;;,M3G'3463J4S;J;;,M3G)



C*(C = l ti t



;he path loss criterion parameter C* used or cell selection andreselection is defned b"#

C1 = ([Current Rxlev- [!"n"#u# $%%e&& R'LE-!ax([!)*T'P+R*!$'*CCH- [!ax"#u# R, ut.ut ./er te !)2033

or Cell =eselect !enalt" ;imeI 2*#C4 = C1 5 [Cell Re&ele%t O6&et- [Cell Re&ele%t Te#.raryO6&et7 H([Cell Re&ele%t Penalty T"#e - T3

or Cell =eselect !enalt" ;ime G 2*

C4 = C1 [Cell Re&ele%t O6&et

C*(C =eselection parameters ;uning

!repared b" #'()(*+ 8

C*(C = l ti t



C*(C =eselection parameters ;uning

!repared b" #'()(*+ *

*:88 Cell !arameters

Minimum Jccess =>.3FG:Cell =eselect !enalt" ;imeG+Cell =eselect ODsetG8Cell =eselect ;emporar"ODsetG+

788 Cell !arameters

Minimum Jccess =>.3FG*Cell =eselect !enalt" ;imeG8Cell =eselect ODsetG8Cell =eselect ;emporar"ODsetG8

10-1 (900Cell3

000-(1800

Cell3

!)4!)1

J5erage=le5 orboth MSs is-:+ dBm

Beore !enalt" ;imer epiration

MSP* MSPCellName C*C

CellName C*C

*++8-* *2 *2 *++8-* *2 *2+888-+ * ** +888-+ * **

Jter !enalt" ;imer epirationMSP* MSP

CellName C*C

CellName C*C

*++8-* *2 *2 *++8-* *2 *2+888-+ * * +888-+ * **



,mportant counters or Multi-.a"er Optimization

!repared b" #'()(*+ 2

!ea&ure#entun%t"n

!ea&ure#ent &u:-un%t"n Cunter ;a#e

BSC Measurement Call Measurement per BSC R;CJ22+*0#Number o Calls Originated or ;erminated b" MSs Supporting 4CS*:88 Bandper BSC

Call Measurement M= Measurement upon 0ando5er perCell

S22+#Mean Lplink =ecei5ing .e5el during 3dge0ando5er ,nitiation

Call Measurement M= Measurement upon 0ando5er perCell

S22)#Mean 4ownlink =ecei5ing .e5el during3dge 0ando5er ,nitiation

Call Measurement Outgoing ,nternal ,nter-Cell 0ando5erMeasurement per Cell

02*8*H#Number o Outgoing ,nternal ,nter-Cell0ando5er =e$uests /4irected =etr"1

/788(:+8(:*8-*:88(*7881Call Measurement Outgoing ,nternal ,nter-Cell 0ando5er

Measurement per Cell02*8*R#Number o Outgoing ,nternal ,nter-Cell

0ando5er =e$uests /4irected =etr"1/*:88(*788-788(:+8(:*81

Call Measurement 6SM Cell to 6SM Cell Outgoing0ando5er Measurement

02@C#Aailed Outgoing ,nter-Cell 0ando5ers/Lplink Strength1

Call Measurement 6SM Cell to 6SM Cell Outgoing0ando5er Measurement

02@4#Aailed Outgoing ,nter-Cell 0ando5ers/4ownlink Strength1

Call Measurement 6SM Cell to 6SM Cell Outgoing

0ando5er Measurement

02@'C#Outgoing ,nter-Cell 0ando5er =e$uests

/Lplink Strength1Call Measurement 6SM Cell to 6SM Cell Outgoing

0ando5er Measurement02@'4#Outgoing ,nter-Cell 0ando5er =e$uests

/4ownlink Strength1Call Measurement 6SM Cell to 6SM Cell Outgoing

0ando5er Measurement02@2C#Successul Outgoing ,nter-Cell

0ando5ers /Lplink Strength1Call Measurement 6SM Cell to 6SM Cell Outgoing

0ando5er Measurement02@24#Successul Outgoing ,nter-Cell

0ando5ers /4ownlink Strength1

!ractical case



!ractical caseP*

!repared b" #'()(*+ '

9001800

*:88 Cell!arameters

4.3463;0=3SG8L.3463;0=3SG*+,N;3=C3..0HS;G)@3463.JS;*G'3463S;J;*G)0O;0=3SG+,N;3.3F0O0HS;G

)@.3F.JS;G).3FS;J;G'

,nter .a"er 0O Aormula#

;arget Cell =le5IG0O;0=3SK,N;3.3F0O0HS;-)'

788 Cell!arameters

4.3463;0=3SG+L.3463;0=3SG8,N;3=C3..0HS;G)@3463.JS;*G'3463S;J;*G)0O;0=3SG2+,N;3.3F0O0HS;G


*:88 !, B0Status

0igh Congestion=ate

;C0LtilizationI7+T

;=> 3pansion isnot !ossible

788 !, B0 Status

No Congestion ;C0Ltilization@8T

3463 0O Aormula#Ser5ing Cell=le5IG4.3463;0=3S(L.3463;0=3S

!ractical Case



!ractical CaseP

!repared b" #'()(*+ +

9001800

*:88 Cell!arameters

4.3463;0=3SG8L.3463;0=3SG*+,N;3=C3..0HS;G)@3463.JS;*G'3463S;J;*G)0O;0=3SG2+,N;3.3F0O0HS;G


,nter .a"er 0O Aormula#

;arget Cell =le5IG0O;0=3SK,N;3.3F0O0HS;-)'

788 Cell!arameters

4.3463;0=3SG+L.3463;0=3SG8,N;3=C3..0HS;G)@3463.JS;*G'3463S;J;*G)0O;0=3SG2+,N;3.3F0O0HS;G


788 !, B0 Status

0igh Congestion=ate

;C0LtilizationI7+T

;=> 3pansion isnot !ossible

*:88 !, B0Status

No Congestion ;C0Ltilization@8T

3463 0O Aormula#Ser5ing Cell=le5IG4.3463;0=3S(L.3463;0=3S



Concentric Cell Aeature

!repared b" #'()(*+ @

EG)!900

Cell

BCC0

;=>P

;=>P2

;=>P'

;=>P

;=>P2

;=>P'

1800

TR'&

900 TR'&

Concentric Cell Confguration /Co




*% ;here is no *:88 Cells in the network9 *:88 ;=>sare added as additional ;=>s to 788 Cells%

% 4uring the dri5e test the mobile can see onl" 788cells

2% Jll the signaling channels and 6!=S(3463 channelsare in 788 ;=>s onl"%

'% ;he mobile initiate the call rom 788 S4CC0 9 thenthe BSC will decide whether to gi5e it 788 ;C0 or*:88 ;C0 according to =le5 and distance o the

mobile%+% When the mobile making call on 788 ;C0 9 it

cannot see the =le5 o *:88 ;=>s%)% , the mobile goes closer to the cell while using 788

;C0 9 it will perorm intra-Cell hando5er rom 788

;=> to *:88 ;=> based on specifc threshold

Concentric Cell Confguration /Co-BCC01

!repared b" #'()(*+ :





@% *:88 ;=>s use *:88 MJ list re$uencies and 788 ;=>s use 788 MJ list re$uencies /two MJ lists inone Cell1

:% Since all ;=>s are confgured under one cell 9 the

antennas used or 788 and *:88 ;=>s should bethe same antenna %

7% !arameters can be tuned to push tra<c rom *:88 ;=>s to 788 ;=>s or the opposite /diDerentparameters rom multi-.a"er1%

*8% ;he group o ;=>s that belong to same band arecalled SubCell so each cell has two SubCells#o5erlaid and underlaid subcells


!repared b" #'()(*+ 7




• !ros#*% Better capacit" 3<cienc" /tra<c capacit" o

) ;=>s in one cell is larger than tra<c o 2K2 ;=>s in two separate Cells1%

% Sa5e BCC0 and S4CC0 timeslots since thereis onl" one cell used%2% 3asier to optimize the neighbors and change

BCC0 re$uencies /not too man" neighbors1%'% .ess ,ntererence on *:88 band because

there is no BCC0 carrier an" more%


!repared b" #'()(*+ 28




• Cons#

*% 0igher 4C= than multi-.a"er confgurationbecause the mobile cannot see *:88 =le5while ser5ed b" 788 ;=>s9 so drop occurduring intra-Cell hando5er%

% .ess e<cient in distributing tra<c so moreprobabilit" o ;C0 congestion on one o theSubCells

2% 0arder to Optimize rom !arameters tuningpoint o 5iew%

'% fed 6!=S and 3463 ;Ss are on 788 ;=>s 9this band will be more interered than *:88Band%

+% =e$uires .icense o Concentric cell and

license o Co-BCC0


!repared b" #'()(*+ 2*



Concentric Cell 0ando5er Scenarios

!repared b" #'()(*+ 2

OL

)u:-Cell

<L)u:-Cell

<L)u:-Cell

OL)u:-Cell

IntraCell

HO <Lt OL

Intra

CellHO OLt <L



Concentric Cell !arameters

!repared b" #'()(*+ 22

!O Para#eter ID Para#eter ;a#eRe%##en

e alue6C3.. 3N,LO 3nhanced Concentric Jllowed ON

6C3..C0M6J4 ;C0;=,CBLSHOF3=.JH;0= ;ch ;ra<c Bus" O5erla" ;hreshold @8

6C3..C0M6J4 ;C0;=,BLSHLN43=.JH;

0= ;ch ;ra<c Bus" Lnderla"

;hreshold )86C3..0O,LO L.;OO.0OJ..OW L. to O. 0O Jllowed H3S6C3..0O,LO O.;OL.0OJ..OW O. to L. 0O Jllowed H3S6C3..0O,LO =3C.3FLO0OJ..OW =>U.3F or LO 0O Jllowed H3S6C3..0O,LO =3C?LJ.LO0OJ..OW =>U?LJ. or LO 0O Jllowed NO

6C3..0O,LO ;JAO=LO0OJ..OW ;J or LO 0O Jllowed NO6C3..0O,LO =3C.3F;0=3S =>U.3F ;hreshold 286C3..0O,LO =3C.3F0HS; =>U.3F 0"steresis +6C3..0O,LO =3C?LJ.;0 =>U?LJ. ;hreshold )8

GCELLHOBASIC ATCBHOEN Concentric Circles ATCB HO Allowed YES

GCELLHOEDBPARA ATCBTHREDDistance Between Boundaries o

Su!cells "#

GCELLHOEDBPARA ATCBHYST Distance H$steresis BetweenBoundaries %



Lsuall" tuned !arameters

!repared b" #'()(*+ 2'

!O Para#eter ID Para#eter ;a#eRe%##ene

alue6C3..0O,LO ;J;0=3S ;J ;hreshold )26C3..0O,LO ;J0HS; ;J 0"steresis 86C3..0O,LO ,LO0OS;J;,M3 LO 0O Watch ;ime *86C3..0O,LO ,LO0O4L=J;,M3 LO 0O Falid ;ime :6C3..0O,LO O!;,.JH3= Jssign Optimum .a"er S"sOpt

6C3..0O,LO O!;,.3F;0=3SJssign-optimum-le5el

;hreshold 2+

6C3..0O,LO O!;,;J;0=3S

;J ;hreshold o Jssignment

!re )26C3..0O,LO 0OJ.6O!3=M.JH !re% Subcell in 0O o ,ntra-BSC S"sOpt

6C3..0O,LO JCC3SSO!;,.JH,ncoming-to-BSC 0O Optimum

.a"er Lsubcell

6C3..0O,LO O;OL=3C3,F3;0OtoL 0O =ecei5ed .e5el

;hreshold 8

6C3..0O,LO L;OO=3C;0LtoO 0O =ecei5ed .e5el

;hreshold 2+6C3..0O,LO L;OO;=JA0OJ..OW LtoO ;ra<c 0O Jllowed NO

6C3..0O,LO !SO;OL=3C3,F3;0=S0!S OtoL 0O =ecei5e .e5el

;hreshold +

6C3..0O,LO !SL;OO=3C3,F3;0=S0!S LtoO 0O =ecei5e .e5el

;hreshold 2+

6C3..0O,LO !S;JAO=LO0OJ..OW ;J Based !S LO Jssignment

Jllowed NO

6;=>,LO ,LO Concentric Jttribute NON3



• ,n case the parameter O!;,.JH3= is set to S"sOpt*% , S4CC0 M=s are a5ailable 9the .a"er chosen is

determined b" #Re%e"ve level > RECLETHRE) 5 RECLEH?)T (ntenan%e3Re%e"ve level > <TOORECTH (enan%e %n%entr"%%ell3

Where =ecei5e le5el is the a5erage o 4l =le5 etractedrom S4CC0 measurement reports sent b" MS%

% , S4CC0 M=s are not a5ailable 9the .a"er chosen isdetermined b" #Re%e"ve level > OPTILETHRE)

Where =ecei5e le5el is the a5erage o L. =le5 M=scollected b" B;S%

• ,n case the parameter O!;,.JH3= is set to L. or O.preerred#

*% , the L. is preerred the mobile will be assigned in L. 9 i

Channel Jssignment

'()(*+ 2+

0O L.O. and



• <L t OL@• , the enhanced Concentric Cell is not enabled

/3N,LOGOAA1Re%e"ve level > RECLETHRE) 5 RECLEH?)T

• , the enhanced Concentric Cell is enabled /3N,LOGON1Re%e"ve level > <TOORECTH

Rxlev()erv"nA3 Rxlev(;e"A3> $TCBTHRED 5$TCBH?)T

• OL t <L@• , the enhanced Concentric Cell is not enabled

/3N,LOGOAA1Re%e"ve level RECLETHRE) - RECLEH?)T

• , the enhanced Concentric Cell is enabled /3N,LOGON1Re%e"ve level OTO<RECTHRxlev()erv"nA3 Rxlev(;e"A3 $TCBTHRED 5$TCBH?)T

0O L.O. andO.L.

'()(*+ 2)



O5erlaid area calculation

'()(*+ 2@

$rea$%"ev"nA T$

%n"t"n

$rea$%"ev"nA

Rxual%n"t"n

$rea$%"ev"nA

Rxlev%n"t"n

O. Jrea defned b" the ollowing conditions#=ecei5e le5el I RECLEVTHRES K RECLEVHYST

;J TATHRES VTAHYST XOR =?ualRECQUALTH

Concentric Cell Confguration /Co-



Concentric Cell Confguration /CoBCC01

!repared b" #'()(*+ 2:

EG)!900

Cell

BCC0

;=>P

;=>P2

;=>P'

;=>P

;=>P2

;=>P'

1800

TR'&

900 TR'&

,LOGL.

,LOGL.

,LOGL.

,LOGL.

,LOGO

.,LOGO

.

,LOGO.

, t t t



,mportant counters

!repared b" #'()(*+ 27

!ea&ure#ent)et

De&%r".t"n

!ea&ure#ent <n"tDe&%r".t"n

Cunter De&%r".t"n

Call MeasurementCall 4rop Measurement per CellCM228J#Call 4rops on the ;ra<c Channels on the ;=> in

the Lnderlaid Subcell

Call MeasurementCall 4rop Measurement per CellCM228B#Call 4rops on the ;ra<c Channels on the ;=> in

the O5erlaid SubcellChannel

MeasurementChannel Jssignment Concentric

Cell Measurement per Cell=2+#Channel Jssignment O5erows in Lnderlaid Subcell

/;C01Channel


Cell Measurement per Cell=2'#Channel Jssignment O5erows in O5erlaid Subcell

/;C01Channel


Cell Measurement per Cell=2'#Aailed 0ando5ers rom Lnderlaid Subcell to

O5erlaid Subcell due to Bus" Channels in O5erlaid Subcell

Channel

Measurement

Channel Jssignment Concentric

Cell Measurement per Cell

=2+#Aailed 0ando5ers rom O5erlaid Subcell toLnderlaid Subcell due to Bus" Channels in Lnderlaid

SubcellChannel

MeasurementChannel State Measurement

per CellJ=2++@#Mean Number o Bus" ;C0s /O5erlaid Subcell1

ChannelMeasurement

Channel State Measurementper Cell

J=2++:#Mean Number o Bus" ;C0s /Lnderlaid Subcell1

M= Measurement Number o M=s per Cell C=2++@#;ra<c Folume on ;C0s /Lnderlaid Subcell1M= Measurement Number o M=s per Cell C=2++:#;ra<c Folume on ;C0s /O5erlaid Subcell1!acket Switch Call

Measurement,ntra-C3.. 0ando5er

Measurement0788*#Number o O5erlaid Subcell to Lnderlaid Subcell

0ando5er =e$uests!acket Switch Call


Measurement0788#Number o Lnderlaid Subcell to O5erlaid Subcell

0ando5er =e$uests!acket Switch Call


Measurement07882#Number o Successul 0ando5ers rom O5erlaid

Subcell to Lnderlaid Subcell!acket Switch Call


Measurement0788'#Number o Successul 0ando5ers rom Lnderlaid

Subcell to O5erlaid Subcell!acket Switch Call


MeasurementC0788+#Number o Aailed 0ando5ers rom O5erlaid Subcell

to Lnderlaid Subcell!acket Switch Call


MeasurementC0788)#Number o Aailed 0ando5ers rom Lnderlaid

Subcell to O5erlaid Subcell

!ractical case



!ractical caseP*

!repared b" #'()(*+ '8

<L)u:Ce

ll

OL)u:Cell

!arameter Settings

LtoO 0O =ecei5ed .e5el ;hresholdG+OtoL 0O =ecei5ed .e5el ;hresholdG*+Jssign-optimum-le5el ;hresholdG2+3nhanced Concentric JllowedGON

;ch ;ra<c Bus" O5erla" ;hresholdG@8 ;ch ;ra<c Bus" Lnderla" ;hresholdG)8=>U.3F ;hresholdG28=>U.3F 0"steresisG+=>U.3F or LO 0O JllowedGH3S=>U?LJ. or LO 0O JllowedGNO ;J or LO 0O JllowedGNO

!,s Status

• 0igh 4C= on the cell ater acti5ating Concentric Cell%• Most o the drops are on O. SubCell%• ;he 4. and L. ?ual o O. SubCell is 5er" good• L. SubCell is highl" utilized 9 O. SubCel is not%

!ractical case



!ractical caseP2

!repared b" #'()(*+ '*

<L)u:Ce

ll

OL)u:

Cell

!arameter Settings

LtoO 0O =ecei5ed .e5el ;hresholdG2+OtoL 0O =ecei5ed .e5el ;hresholdG+Jssign-optimum-le5el ;hresholdG2+3nhanced Concentric JllowedGOAA

;ch ;ra<c Bus" O5erla" ;hresholdG@8 ;ch ;ra<c Bus" Lnderla" ;hresholdG)8=>U.3F ;hresholdG28=>U.3F 0"steresisG+=>U.3F or LO 0O JllowedGH3S=>U?LJ. or LO 0O JllowedGNO ;J or LO 0O JllowedGNO

!,s Status

• Fer" high ;C0 Congestion on the cell• ;C0 Ltilization rate :8 T• When checking ;C0 Aailure per SubCell 9 most o the ailure on

L. SubCell• O. Sub Cell ;ra<c is 5er" weak

3nhanced 4ual Band eature /34B



• Aeature !rinciple• !ros and Cons• Aeature tuning

• 0ow to tune the eature !arameters• Aeature counters• !ractical 3ercise

3nhanced 4ual Band eature /34Beature1

multi band optimization

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