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BTS
1
www.iran-ieee.com
BTS
BTS
2
:
) 54141158 (
)(ICT
7831
BTS
3
: BTS -- -- ) ( . BTS -- . ) ( GSM -- . GSM -- . --
BTS
4
- 03 .
BTS
5
:......................................................................................................................................................6 BTS ............................................................................................................7 BTS .......................................................................................................................................8 10.......................................................................................................................BTS 11........................................................................................................................BTS 11.........................................................................................................................................BTS 15................................................................................................................................GSM 16.............................................................................................................................GSM ..................................................................................................................81 .................................................................................................................................81 .........................................................................................................................91 ..........................................................................................................................................02 BSC ........................................................................................................................................22 ..............................................................................................................................52 25......................................................................................................................... GSM ................................................................................................62 26...............................................................................................BTS 29..............................................................................................................BTS 31.............................................................................................GSM450 BTS BTS .........................................................................................................23 BTS ................................................................................................................73 BTS ...........................................................................................................................14 BTS ...................................................................................................................24 ..................................................................................................................................................44
BTS
6
: BTS . )(GSM BTS . BTS . )( . 0881 . 52 04 05 . . 6 ) ( . . BTS . 65 65 . .
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7
BTS : )( . 0881 . 52 04 05 . . . 6/0 3/0 . . : 1. BTS . 2. .
. .
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BTS " " BTS Base Tranceiver Station . BTS : ) !! (
. . )( . )( .
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9
) ( Feeder BTS . ) ( . ) ( . BTS :
BTS
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BTS . :
BSC BTS .
: BTS :
1. ) ( 2.
52 03 02 .
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. BTS
: BTS1. : TRX - Transciever . . )(Transmitter & Receiver
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BTS BTS . :
0001 .
04 BTS TRX .
TRX BTS . TRX
3 TRX TRX .
GSMK . BTS TRX .
69
8 . TRX .
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6 TRX 84 2 ) - ....( 64 ) ( .
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31
BTS TRX :
2. : O&M BTS . BSC MSC . 3. : . BSC BTS
BTS : BTS " " . ... .
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41
-SIEMENS
_ALKATEL
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_ERICSSON
:GSM G.S.M : Groupe Special Mobile Global System For Mobile Communications ) 2391 ( : 0991 :
.
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GSM .
: GSM _ 009 _ _ ) MS ( ) ( Mobility _ : SMS , Fax . . . _ ISDN _. ..
: GSM GSM :1. : NSS )(Networking & Switching SubSystem 2. : RSS )(Redio SubSystem 3. : OSS )(Operation SubSystem
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GSM :
GSM . ) ( GSM : _ A BSC MSC . _ A-bis BTS BSC . _ UM MS BTS . MAP : AUC VLR HLR EIR MSC
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: GSM ) . (PSTN EIR HLR VLR.
MSC MSC AUC
: : MS BS * ) ( *
_: ( Mobile Station ) MS . MS . SIMCARD . :
mobility .
MS
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_ : ( Base Station) BS :
: 1. : ( Base Station Control ) BSC ) (
BTS : -
- ) ( Paging
: MSC " " .
- MSC
2. : ( Base Tranceiver Station ) BTS ) ( .
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: 1. 2.
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HandOver MS BTS BSC BTS MS MS handover MS
MS Fullrate Halfrate
BTS BSC BTS ) MS ( BTS .
BTS . BSC BTS BSC . Base Station Controller BSC .
BSC
. Hand Over BSC BTS .
BSC
) (
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32
. BSC TRX BSC BSC . BSC . BSC LMT 821 652 215 TRX .
BSC BTS BSC .
BTS .
LMT
BTS BSC " " BTS LAC CI
... . BSC .
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BSC
BS MS MS " " )084 ( BTS ) ( . .
-- . -- .
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) : ( HO )( Hand Over --
HO .
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. BTS
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: GSM GSM GMSK QPSK . GMSK FM .
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62
) : ( GSM GSM : 2( 0081-GSM 1( 009-GSM
009- GSM )(UPLINK 098 915 MHZ
935MHZ 069 .
0081-GSM ) (UpLink 0171 1785 MHZ ) (DOWNLINK 1805 MHZ 1880MHZ . 009- GSM 421 009- GSM 0081_ GSM . DUAL BAND
0081- GSM 473 . : .
: BTS :
. )Horizental (H-Pole )Vertical (V-Pole X-Pole 1.
: 2.
3.
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-- . . : : Shadowing . : Scattering )(l . : Reflection ) (l . : Diffraction ) (l . .
) Diversity ( : . : BTS 03 2 5 . 02 .
BTS
82
: 1( BTS 51 . 2( . . .) (
BTS BTS manual .
BTS
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: . ) Downlink BTS (MS Uplink ) MS ( BTS .
Downlink . MS
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Fade Margin .
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. 32 .
* : Downlink BTS
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009 0081 .
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) ( X : 1=X 2=X -- 2 1 2 3 3=X
009 0081 : 4=X 5=X : . 6=X
: GSM 450 BTS . .
BTS .
.
GSM .
054 GSM 5002 . BTS 2 002 GSM .
BTS
23
054 GSM
GSM . . .
054 04 BTS 054 GSM . . 054 GSM BTS . GSM . .
054 GSM EDGE GPRS Bit Rate 054 GSM 054 GSM . BTS .
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BTS : BTS Acquisition . Nominal .
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. . . . BTS . .
.- Propagation models & Model Tuning - Frequency Planning - RF Planning - Capacity and coverage planning - Indoor planning ... -
) ( BTS Implementation :
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2 M ...
-
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