Terminology » GSM » GSM Combined Channel Configuration

GSM Combined Channel Configuration

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channel
configuration
time slot
signaling

This page describes the GSM combined channel configuration for Time Slot 0 (TS0). It covers the 51-frame multiframe structure, mentioning the mapping of FCCH, SCH, BCCH, CCCH, SDCCH, and SACCH channels on TS0 for both downlink and uplink.

Signaling channels (SDCCH) are combined with (FCCH+SCH+BCCH+CCCH) on time slot TS0. In this configuration, the position of FCCH+SCH+BCCH remains unchanged, but the CCCH capacity is reduced from 9 blocks to just 3 blocks.

These 6 blocks are reallocated: 4 blocks are used by SDCCH, and 2 blocks are used by SACCH.

GSM combined channel configuration

In the downlink, the CCCH provides a pathway for signaling channels (SDCCH/SACCH). Similarly, in the uplink, RACH gives a way for these signaling channels, as illustrated in the figure above.

Understanding GSM Channels in 2G Networks

Understanding GSM Channels in 2G Networks

Explore the different types of GSM channels (logical, physical, combined, and non-combined) and their functions in a 2G network for efficient mobile communication.

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2g
network
GSM Frequency Correction Channel (FCCH)

GSM Frequency Correction Channel (FCCH)

The GSM Frequency Correction Channel (FCCH) is a downlink channel used for synchronization between the BTS and MS by transmitting a continuous wave signal.

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frequency correction
channel
GSM PCH (Paging Channel) Explained

GSM PCH (Paging Channel) Explained

Learn about the GSM PCH (Paging Channel), used for paging mobile devices in idle mode to alert them about incoming calls.

gsm
paging
channel
GSM Synchronization Channel (SCH) Explained

GSM Synchronization Channel (SCH) Explained

Learn about the GSM Synchronization Channel (SCH), its role in time synchronization, and the information it carries, including the frame number and BSIC.

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synchronization
channel