, MS . TCH (Traffic Channel). TCH:
- (FR-TCH): 13 /. TCH .
- (HR-TCH): 5.6 /. , .
(Bursts)
TDMA , , (bursts):
3.4
-: | |||
Normal Burst | BCCH, PCH, AGCH, SDCCH, CBCH, SACCH, FACCH, TCH | 57 , . (26 ). (Steal flags) 1 , , FACCH 57 . (Tail bits) ( 000) (Guard period) 8.25 . | |
Frequency Correction Burst | MS | FCCH | 142 . . : 8.25 . |
Synchronization Burst | MS | SCH | 39 TDMA. 64 . . : 8.25 . |
Dummy Burst | , | TS C0 (1-7) | , . |
Access Burst | RACH, FACCH | 41 . 36 (, -). . (GP): 68.25 . GP - , . |
NB (Normal Burst)
NB , RACH. 114 (GP) 8,25 30,46 . 114 57 , 26 , .
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NB (Steeling Flag), , : . (Traffic Channel) , .
NB 26 , . :
- . RXQUAL, . , , , . RXQUAL , ;
- NB ;
- . , . , .
FCB (Frequency Correction Burst)
FCB . 142 - , 1625/24 . (200 ), 0,022% 900 . FCB 8,25 , . (FCB) (FCCH).
SB (Synchronization Burst)
SB . 64 , TDMA . . (SCH).
DB (Dummy Burst)
DB . DB NB (. 3.3) 26 . DB , . DB , .
AB (Access Burst)
. . , , . . 8 , - (41 ), 36 . (68,25 , 252 .), ( ) .
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. GSM - 35 . 233,3 .