SPI_Metod
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2
2 GSM-900
2.1.
,
GSM.
2.2.
1.GSM.
2..
3., HLR VLR.
4..
5..
2.3.
GSM (Global System for Mobile communications)
, ISDN IN (Intelligent Network). GSM
UMTS (Universal Mobile Telecommunications System). 1990 . GSM.
1991 . GSM, 1993 .
36 GSM 22 , 25 GSM
. 1992 . GSM
( ).
1996 .
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Telecommunications Standardization Sector) GSM
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14
, GSM,
. 2.1, MSC (Mobile Switching Centre) –
; BSS (Base Station Sistem) –
; (Operations and Maintenance Cetre) – ; S (Mobile Stations) – .
2.1 – GSM.
.
GSM
N7 ( SS. N7). SS N7
.
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, (BSC),
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BSC, MSC.
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. HLR
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(AUC) ( . 2.2, 2.3).
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VLR.
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LA.
LA , VLR.
LA VLR, VLR
VLR. VLR ,
HLR, .
16
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MSC,
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. 2. HLR VLR.
VLR
MSC . , VLR TMSI
HLR.
. TMSI
. VLR
IMSI, TMSI MSRN. VLR
, ,
HLR .
- .
17
.
.
,
(EIR -Equipment Identification Register).
2.3 – HLR VLR.
(SIM), ,
(IMSI), (Ki),
( 3).
SIM
.
.
(RAND) . Ki
A3 (SRES), .
SRES Ki * RAND
SRES ,
SRES SRES, .
, .
, , .
SRES SIM.
( , Ki) SIM.
. 2.4.
18
2.4 – .
EIR - ,
(I I).
. EIR I I,
:
- I I, ,
.
- I I ,
.
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EIR MSC , MSC
. HLR, EIR,
EIR I I. MSC
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BSS - , (BSC)
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MSC (64 ) , GSM
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6,5 ).
,
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SS N7 LAPD.
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30 64 + 64 + 64 = 2048 .
MS - , ,
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,
(IMSI), .
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(IMEI). GSM
.
2.4.
1..
2.3ap co y po
GSM.
2.5. .
1.GSM.
2.GSM.
3., MSC.
4., HLR VLR. .
5..
6.IWF, .
7., .
8.« ». ?
9.BSS. .
10..
GSM.
2.., ., . / , -
. 1999.
3.. . – . . 2000.