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dedicated control channel (DCCH)

The Dedicated Control Channel (DCCH) is one of three logical organization channels of the signaling channel (Dm) in GSM networks

. It essentially corresponds to the D channel in ISDN and can exist in three different forms: As Standalone Dedicated Control Channel (SDCCH), as Slow Associated Control Channel

(SACCH) and as Fast Associated Control Channel (FACCH).

Channel distribution of GSM channels

Channel distribution of GSM channels

The SDCCH

isused to transmit the signalling data for the destination network and the channel number of

the traffic channel used to the radio telephone. The Associated Control Channel (ACCH) is a control channel that only exists if a traffic channel has been allocated to the subscriber. This channel is used to transmit supplementary messages during an existing connection and to control the handover with the base station.

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Englisch: dedicated control channel - DCCH
Updated at: 16.03.2008
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Translations: DE