GSM Channels – GSM as two types of channels Physical and Logical. The Logical channels are divided in two sub channels one for signalling control and other for voice packets.

GSM Channels
GSM Channels

Control / Signalling Channels

Broadcast Channels BCH – Downlink

  • BCCH – Broadcast Control Channel carrier the Cell information
  • FCCH – Forward Access Channel
  • SCH – Synchronization Channel

Common Control Channels – CCCH

  • RACH – Random Access Channel
  • AGCH – Access Ground Channel
  • PCH – Pagging Channel

Dedicated Control Channels – DCCH

  • SDCCH – Standalone Dedicated Control CHannel
  • SACCH – Slow Associated Control Channel is used for SMS messages
  • FACCH – Fast Associated Control Channel is used for conference calls

TCH – Traffic Channels

Full-Rate Traffic Channel – TCH/F

Half-Rate Traffic Channel – TCH/H

VCH

DCH

Categories: GSM

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