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, () - TDMA () - CDMA.
- 2G
| GSM 900 / GSM 1800 | IS-136 (D-AMPS) | IS-95 (CDMA) | ||
| , | 935 - 960 | 869 - 894 | 869 - 894 | |
| , | 890,0 - 915,0 | 824 - 849 | 824 - 849 | |
| , | 45,0 (GSM 900); 95,0 (GSM1800) | 45,0 | 45,0 | |
| , | 200,0 | 30,0 | 1250,0 | |
| 124+124=248; 187+187=374 | 790 + 42 | |||
| , | 20,0 | 3,0 | 35,0 | |
| , | 156,25:4,615=33,8 | |||
| , / | 33,8 8 = 270,4 | |||
| , / | 13,0 | 8,0 | 8,0; 4,0; 2,0; 1,0 | |
| FDMA+TDMA ( + . ); CDMA - . ) | FDMA+ TDMA | CDMA+ TDMA | ||
| ( - GSM - TDMA) | ||||
| , | 35,0 | 20,0 | 50,0 | |
| , / (/) | 250,0 (69,4) | |||
| 1- (. ), | 0,577 | |||
| , | 0,577 8 = 4,615 | |||
| , | 130,0 | 130,0 | 130,0 | |
| . : . / | 148 + 8,25 - 156,25 | |||
TDMA - Time Division Multiple Access - () - 2G
) á
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0,57
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GSM - 2G
GSM
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Um
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A
:
- -
- MS -
- SIM - Subscriber Identity Module - (SIM-), MS
- HLR - Home Location Register - - ("" ). - , , , - GSM.
MS LA, HLR .
- GMSC
- VLR - Visitor Location Register - () - "" , HLR LA MS.
VLR HLR HLR .
- - Operation and Maintenance Centre - ( -: TMN - ) GSM ""
( .25 - 7, SS7), , (), ..
AuC - - , , , HLR, AuC.
EIR - - , , GSM. MS - , , , SIM - Subscriber Identive Module - ( : "SIM-") MS. EIR "" ( MS), "" - MS , "" - .
Um - GSM, . Um - "U " - (ISDN), . .
Abis - () 16,0/ 64,0/.
