9.2.1 . , .
:
1) :
:
- NMT (Nordic Mobile Telephone System);
- AMPS (Advanced Mobile Phone System);
:
- GSM (Global System for System Communications)
- DAMPS (Digital Advanced Mobile Phone System)
2) .
( 9.2).
9.2
, | , | |||
MS-BS | BS-MS | MS-BS | BS-MS | |
NMT-450 | 453-457,5 | 463-467,5 | 65,6-66,3 | 63,2-64,9 |
AMPS/DAMPS | 824-849 | 869-894 | 35,4-36,4 | 33,6-34,6 |
GSM-900 | 890-915 | 935-960 | 32,8-33,7 | 31,2-32,1 |
GSM-1800 | 1710-1785 | 1805-1880 | 16,8-17,6 | 16,0-16,6 |
3) :
FDMA (Frequency Division Multiple Access) - , ();
TDMA (Time Division Multiple Access) - ();
CDMA (Code Division Multiple Access) , ().
9.2.2 . , . . , , . . , . . 9.1.
:
1) MS , . SIM (Subscribe Identity Module), MS, - :
- (3 );
- (2-3 );
- (10 ).
9.1
2) BS - BTS BS.
3) S, :
- MS MS;
- MS ;
- MS.
MS , MS . , .
|
|
4) , , .
, :
SIM (Subscribe Identity Module), MS, - :
- (3 );
- (2-3 );
- - (10 );
HRL (Home Location Register), , ;
VLR (Visited Location Register), , ( );
AVC (Authentication Center), ;
EIR (Equipment Identity Register), MS.
(, ) , , , . . . , PIN- (Personal Identification Number), MS. SIM- MS .
, . IMET (International Mobile Station Identity). MS : MS, . :
- MS, ;
- MS, ( , );
- MS.
9.2.3 . :
- MS MS;
- MS ;
- MS.
9.2 MS .
MS (), .
, MS. , . , , .
() . MS (-, f=4 ).
|
|
MS , , . . , . .
9.2 MS