(time slot - TS) TDMA . GSM 8 .
, .
3.1. TDMA
. , . . , . , , TCH Traffic Channel, - Traffic messages), , Fast Associated Control Channel (FACCH).
GSM , / MS.
, MS , , , . , (burst), , , . (burst). 3.2.
. 3.2
, BTS, . MS , , , . MS , . , MS Broadcast Control Channel (BCCH) - .
BCCH MS, , , (LA), , . MS . , MS, . Broadcast Channel (BCH) .
, MS BCH, , . , MS ( - roaming), , FCCH, SCH, BCCH.
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MS, Common Control CHannel (CCCH)
3.1 BCH.
Broadcast Channel (BCH) - | |||
BTS | MS | ||
FCCH (Frequency Correction Channel) | Downlink BTS MS, - | . | BCCH . |
SCH (Synchronization Channel) | Downlink BTS MS, - | TDMA ( ) BS (Base Station Identity Code -BTSIC). | , BTS GSM BTS GSM, BTSIC MS. |
BCCH (Broadcast Control Channel) | Downlink BTS MS, - | : - (LAI), - , - BCCH . | LAI; , LAI , SIM; , BCCH. , MS BCCH, . |
3.2 CCCH.
Common Control Channel (CCCH) | |||
BTS | MS | ||
PCH MS (Paging Channel) | Downlink, BTS MS, - | , MS SMS. , . | MS PCH , ( ), . |
RACH (Random Access Channel) | Uplink, MS BTS, - | MS , , SMS. | RACH . |
AGCH - (Access Grant Channel) | Downlink BTS MS, - | SDCCH MS. | SDCCH. |
MS BSS . MS BSS - DCCH (Dedicated Control channel).
3.3 DCCH.
Common Control Channel (CCCH) | |||
BTS | MS | ||
SDCCH (Stand alone Dedicated Control Channel) | (Uplink, Downlink), - | BTS SDCCH, . BSC TCH. SDCCH MS SMS. | MS SDCCH, . MS TCH ( ) |
CBCH (Cell Broadcast Channel) | Downlink, BTS MS, - | (SMS) MS, . | MS |
SACCH (Slow Associated Control Channel) | (Uplink, Downlink), - | MS , , . | BTS ( , , ) BTS ( ). MS SDCCH. |
FACCH (Fast Associated Control Channel) | (Uplink, Downlink), - | . | . |
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