Frequency Reuse Introduction

7/26/2019 Frequency Reuse Introduction

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FrequencyFrequencyreusereuse

introductionintroduction


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GSM Frequency Band

GSM900Upward 890 915 MHz

Downward935 960 MHz

Tx-Rx difference i !5MHz " carrier pace i#00$Hz %

GSM1800

Upward 1&10 1&85 MHz

Downward1805 1880 MHz

Tx-Rx difference i 95MHz " carrier pace i#00$Hz %


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GSM Channel Numbering

GSM900 ' FU(n) = 890 + 0!n M"#

F$(n) = Fu(n) + %& M"# " ' n '!%

GSM900* FU(n) = 890 + 0!(n'0!%) " 9% n '0!,

F$(n) = Fu(n) + %& M"#

n i- called .b-/luely 1adi/ Frequency Channel Number

GSM'800*

Fu(n) = ''0! + 0!(n&'!) M"#

F$(n) = Fl(n) + 9& M"# " &'! n 88&

,% channel-


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Cellular .rchiecure


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$e2inii/n /2 C34 and C3.

C/channel 4ner2erence C34 'C34 re2er- / he iner2erence /2 an/her cell u-ing

he -ame 2requency / he curren cell 5he rai/ /2 carrier

/ iner2erence i- called C34

=

6

'

7

7

BCCHi

cellown

P

P

I

C

here Pown_cell is the signal strength of current cell;

Pi_BCCH is BCCH signal strength of interfering cell i

measured by MS.


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C34 and C3.

C/channel 4ner2erence C34 ' GSM -:eci2icai/n regulae- ha C34 ;9dB 4n

im:lemening i require- C34;'!dB.d


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Frequency 1eu-e $i-ance

5he 2/ll/>ing equai/n i- u-ed / e-imae2requency reu-e di-ance*

$ ?? 2requency reu-e di-ance

1 ?? cell radiu-

N ?? 2requency reu-e 2ac/r (F1F)

N=9 2/r @,,A N='! 2/r @% ,A

F/r @,39A 2requency reu-e $=&!1

F/r @%3'!A 2requency reu-e $=61

R! ,=


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Gr/u: Frequency 1eu-e Daern (%E,,E,)

Muli:le 1eu-e Daern (M1D)

C/ncenric Circle (n/rmal c/ncenric circle

inelligen c/ncenric circle)

Frequency 1eu-e Daern-

Frequency Dlanning and

4ner2erence .naly-i-


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%, Frequency 1eu-e

@% ,A 2requency reu-e :aern i- ha each -ie i- diided in/ ,-ec/r '! 2requencie- 2/rm a gr/u: >hich are di-ribued / %

di22eren -ie- ach -ie />n- , 2requencie-

.,

$!B'

C,

B!$'

$,

.!C'

B,

C!.'

B,

C!.'

.,

.'B'

$'

$,$!

C,

B!.'

C,$!

C,

C'

$!B'C!.'

.!C'

$,


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%, Frequency 1eu-e

Gro)p

(*+51

.' B' C' $' .! B! C! $! ., B, C, $,

' ' ! , % & 6 8 9 '0 '' 12

! ', '% '& '6 ' '8 '9 !0 !' !! !, !%

, !& !6 !

C34='8 dB


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,, Frequency 1eu-e

@, ,A 2requency reu-e :aern i- ha each -ie i- diided in/ ,-ec/r 9 2requencie- 2/rm a gr/u: >hich are di-ribued / ,

di22eren -ie- ach -ie />n- , 2requencie-

.,

C!B'

B,

.!C'

C,

B!.'

.,

C!B'

B,

.!C'

B,

.'C'

.'

.,.!

C,

B!.'

.,.,

C,

C'

B!.'B!.'

.!C'

B,


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.,

A1

.!

.,

A1

.!

.,

A1

.!

.,

A1

.!.,

A1

.!

.,

A1

.!

.,

A1

.!

1*3 , FH , DPC , DTX

M/- den-ely reu-e :aern

BCC" (%,)

C/mbined >ih ani

iner2erence echn/l/gy

Generally " /nly u-e &0H /2he >h/le aailable 2requency

C/I= 9.43 dB

', Frequency 1eu-e


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Set-forth of MRP1!

5he ad/:i/n /2 2requency reu-e :aern de:end- mainly /n

he c/ndii/n /2 -ie- 4n realiy here are grea di22erence- in

anenna heigh earh -ha:e and c/erage M/re/er

di22eren cell- hae di22eren ra22ic requiremen he number

/2 51- needed i- al-/ di22eren S/ iI- unrea-/nable /

ad/:- ideali#ed and regular 2requency reu-e :aern

indi-criminaely >hich >ill cau-e l/> 2requency uili#ai/n

rae and di22icul / en-ure he C34 requiremen


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Se2/rh /2 M1D(!)

S/ in regard / real >irele-- ne>/rJ -iuai/ndynamic a--igning 2requency / cell- acc/rding / heir

ra22ic i- he deel/:ing rend /2 2requency reu-e

:laning Muli:le 2requency 1eu-e Daern (M1D) i- an

irregular and dynamic 2requency reu-e m/de de-igned

acc/rding / GSM 2eaure-


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Drinci:le /2 M1D

M1D i- an irregular 2requency reu-e m/de uili#ing

irregulariy and 2requency h/::ing echn/l/gy /2 GSM

-y-em 5ha i- diiding 2requency band in/ di22eren

c/mbinai/n- each c/mbinai/n ad/:ing di22eren2requency reu-e :aern ach carrier /2 a cell may

ad/:- di22eren 2requency reu-e :aern


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5C"!

F1F=6

BCC" F1F='!

5C"' F1F=9

F/r Micr/cell

M1D

FRF"Fre#$e%&' Re$(e F)&tor

Band>idh=6 M"#


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BCC"

@%E,A

5C"'

@,E,A

5C"!

@!E,A

5C",

@'E,A

MRPFHDTXDPC


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China m/bile*M1D

Frequency band>idh* !M"#

.FN* 60 . 9& /"$iide ,6 carrier 2requencie- in/ % gr/u: a- :er '!39383

.::licai/n /2 M1D

Channel

y:e

K/gic channel 5C"' -erice

channel

5C"! -erice

channel

5C, -erice

channel

Channelnumber

60 6' 6! 6, 6% 6&66 6 68 69 0 '

! , % & 6 8 9 80

8' 8! 8, 8% 8&86 8 88

89 90 9' 9!9, 9% 9&


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60

6!

68

6#

66

&063

6&

&161

65

69

& #

& 5

& 8

& 3

& 6

& 9& #

& 5

& 8& !

& &

8 0

8 9

9 1

9 3

9 0

9 #

9 ! 9 0

9 #

9 !

8 9

9 1

9 3

8 1

8 3

8 5

8 #8 !

8 6

8 #

8 !

8 1

8 3

8 5

8 6

.::licai/n /2 M1D

') BCC" % , !) 5C"' , ,

%) 5C", ! , ,) 5C"! ! ,


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M1D Characer-

4ncrea-e ne>/rJ ca:aciy grealy and decrea-e aerage2requency reu-e 2ac/r / & hu- increa-ing 2requency

reu-e e22iciency grealy

FleLible channel all/cai/n $i22eren 2requency reu-e

:aern may be ad/:ed -e: by -e: acc/rding /ca:aciy requiremen

S/me carrier- can be relea-ed 2/r micr/cell-

Sh/uld c/mbine >ih F" $DC and $5 / l/>er

iner2erence

-:ecially 2/r -ie- di-ribued uneenly

C i 2 h i i i h


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Muli:leL m/de BS c/n2igurai/n .erage -ai/n

ca:aciy

-ub-criber/

Ca:aciy

rai/

6M"

%E, ,3!3! /r ,3,3! '%%0 '

,E, ,3,3, '88 ' !%

'E, %3%3% !6%0 ' 8,

M1D '! 9 6 /

,3,3, '88 ' !%

!E6 !3!3!3!3!3! !'60 ' &

96M"

%E, %3%3% !6!8 '

,E, &3&3& ,,8% ' !9

'E, 63636 %!! ' 6,

M1D '! 9 6 /

63636 %!! ' 6,

!E6 ,3,3,3%3%3% %%'6 ' 68

C/m:ari-/n /2 he -y-em ca:aciie- >ih gr/u:

muli:leLing and M1D echn/l/gie-


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!!

!

!

!

!

! ! !

!

!!

!

!

!

C/ncenric


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C/ncenric !

5he :rinci:le /2 /rdinary c/ncenric i- ha a cell i- diided

in/ underlay and /erlay b/h haing he -ame -ie and-haring he -ame 51- anenna and BCC" 5he c/erage /2

underlay i- he -ame a- ha /2 /rdinary cell >hile he /erlay

u-e -mall ran-miing :/>er and hu- ha- -maller c/erage

5he 2requency reu-e 2ac/r /2 underlay di22er- 2r/m ha /2/erlay 5he 2/rmer ad/:- 2requency reu-e :aern /2 % ,

>hile he laer ad/:- cl/-er :aern /2 , , /r ! , 5he

BCC" and S$CC" are u-ed by underlay in >hich he call

>ill be -e u: .- a cell i- -ubdiided in/ >/ layer- a brand

ne> ->iching alg/rihm -h/uld be added 4nercell hand/er

i- c/nduced in /erlay>hile /erlayunderlay and inra

underlay i- added / inracellhand/er


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C/ncenric ,

5he ab-/rbing /2 ra22ic by /erlay i- limied by ra22ic

lay/u and c/erage 4 >ill increa-e he ca:aciy by

'0,0H and i- relaed / ra22ic di-ribui/n 5he

/erlay i- m/re -uiable 2/r /ud//r ra22ic c/ncenraed

in he iciniy /2 B5S- becau-e /2 i- -mallerran-miing :/>er

M/re aeni/n -h/uld be :aid >hen ne>/rJ :lanning

i- carried /u u-ing c/ncenric echn/l/gy n he

c/ndii/n ha he ne>/rJ qualiy >ill n/ be a22eceda cl/-er 2requency reu-e :aern -h/uld be ad/:ed .

he -ame ime $DC and $5 echn/l/gy -h/uld be

ad/:ed / en-ure ne>/rJ qualiy


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4U (!)

4U ha- he -ame ne>/rJ -rucure a- /rdinary

c/ncenric c/n-i-ing /2 erlay and Underlay 4ngeneral he >/ layer- -hare he -ame -ie and anenna

Similar / /rdinary cell he Underlay ad/:- %,

2requency reu-e :aern >hile he erlay ad/:- cl/-er

:aern KiJe general macr/ cell he Underlay reali#e

c/ninu/u- c/ering mainly 2/r MS- ar/und b/undarie-

/2 cell- 5he erlay reali#e di-c/ninu/u- c/ering

:r/iding -erice- mainly 2/r MS- l/caed nearby he

-ie- and in-ide building- >ih -r/ng i-/lai/n KiJe

/rdinary c/ncenric he c/nr/l channel 2unci/n-

>ihin Underlay >here call- are e-abli-hed


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4U , / $i22eren 2r/m /rdinary c/ncenric he Underlay and

erlay /2 4U b/h u-e he -ame ran-miing :/>erBecau-e he erlay ad/:- cl/-er 2requency reu-e

:aern he chance- /2 c/channel and ad-* he call i- e-abli-hed >ihin Underlay he

BSC c/ninu/u-ly m/ni/r he d/>n>ard C34 in

Underlay hen C34 reache- a::licable hre-h/ld he call

>ill be handed /er / erlay . he -ame ime he C34

i- m/ni/red c/ninu/u-ly and he call >ill be handed

/er / Underlay i2 i deeri/rae- / ina::licable

hre-h/ld


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4U % / 5he im:lemenai/n /2 4U i- ea-y Kile m/di2icai/n

i- needed and n/ -:ecial requiremen / MS- Becau-e/2 ad/:ing -:ecial alg/rihm /n handing /er

mea-uremen and e-imai/n /n C34 he -:eech qualiy

can be guaraneed >hile increa-ing he -y-em ca:aciy

Becau-e b/h Underlay and erlay hae he -ame

ran-miing :/>er iI- ery -uiable 2/r ab-/rbing

ra22ic in-ide building >hich ha- a -r/ng i-/lai/n

ca:abiliy / radi/ -ignal hen im:lemening he

ne>/rJ he C34 ba-ed handing /er :arameer -h/uld

c/n2igured c/rrecly 5he $DC and $5 -h/uld al-/ be

c/n-idered


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Co%&e%tr+&

O erlay -maller ran-miing

:/>er

O "and/er ba-ed /n :/>er /r

5.

O erlay c/erage i- 2iLed

bu n/ rea-/nable

O .b-/rb limied ra22ic

O "and/er alg/rihm i- ea-y

I,

O U3 -ame ran-miing

:/>er

O "and/er alg/rihm ba-ed

/n C34

O erlay c/erage i- 2iLed

and rea-/nable

O .b-/rb m/re ra22ic

O "and/er alg/rihm i-

c/m:licaed

C/m:ari-/n

C i 2 C34 B d


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Ca:aciy /2 C34 Ba-ed

C/ncenric 5echn/l/gy

Ca:aciy c/m:ari-/n >ih @%L,A:aern 'Grade /2 Serice (GS) ' ! HDer -ub-criber ra22ic a bu-y h/ur' 00, rlBand>idh* 6M

erlay ad/:- @%L,A :aern

0 500 1000 1500 2000 2500 3000 3500 4000 4500

Sandard !23

oer4a 3x3

er4a #x3

er4a 1x3

S)7c7

#TR2 Underer4a 1TR2 Under4a (44 )nder4a


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Sub-criber 2/reca-

Gr/>h rend 2/reca- meh/d

D/:ulai/n :enerai/n meh/d

Gr/>h cure meh/d

C/nic meh/d


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G

r

/>

h

r

e

n

d


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G

r

/>

h

r

e

n

d


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D

/

:u

l

a

i

/

n

:

e


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Frequency Reuse Introduction

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