SCP UUS1.
, , " ", . . .
, PLMN GSM. GSM, GSM-RITL, , GSM.
:
(/)
( )
/ (IMSI)
( GSM900-GSM1800)
( MSC)
() (, )
-
, GSM
(OACSU)
( )
-, Asub- Abis-
BTS
(TCH)
2.2.1.
D900/D1800. , . , (, ).
, GSM GSM . GSM PLMN GSM. .
|
|
( Ki , RAND, SRES, Kc), (A3, 8) (3, 8). PLMN (HLR/AC) Ki. 3 8 Ki (SIM). SRES Kc MS. SRES VLR . Kc MS (. 3.3.2 " ").
, , :
,
,
,
VLR.
( , AC, HLR, VLR, MSC). GSM SIM (PCS), , , GSM.
3.29 .
:
1. MS MSC/VLR. VLR .
2. GSM VLR, VLR HLR.
3. HLR AC VLR.
4. VLR RAND MSC BSS MS.
5. MS SRES RAND 3 Ki, (SIM). MS Kc, RAND, 8 Ki.
6. MS SRES VLR.
7. VLR SRES, PLMN, SRES, MS.
SRES , . , VLR.
. 3.29 .
(. " SSS", 1, "", " ").