. 21.2 GSM, [69,70].
RSS (Radio SubSystem).
NSS (Network and Switching SubSystem).
OSS(Operation SubSystem).
RSS BSS -30 64 /. Oѹ7.
. 21.2. GSM
RSS , : MS (Mobile Station) BTS (Base Transceiver Station). BSS (Base Station System). GSM c BSS. MS , . MS . GSM ( MS) FDMA TDMA. . 21.3 .
BTS, BSS, . [10]. ( BTS MS), ( MS BTS). GSM 900 25 . 890 915 , 935 960 . 124 200 . TDMA 8 . , . . , 45 .
. 21.3 , . . 890,2/935,2 2 , ( ), . , .
. 21.3. GSM 124 , 8-
(), BTS, 992 (124 8 ). .
. . , .
|
|
. 21.4, .
. 21.4, a.
. () - , , . , - . . D, , , . DB.
E, F, G, H, (3- ). . 21.4 , . . 3- , , , . .
. 21.4, . 3-
GSM 35 (, , ..) .
BSC (Base Station Controller), BTS BSS, BTS. BTS , . , BSC ( RSS NSS). 1 30 64 /.
, GSM. MS SIM (Subscriber Identity Module), , , , . SIM- ( -) , , , PIN-, IMSI, : TMSI LAI. .