Fast Associated Control Channel (FACCH) Signaling

Fast Associated Control Channel (FACCH) Signaling

This figure shows that GSM FACCH signaling replaces (steals) speech frames and replaces them with control information. This example shows the FACCH messages is divided and transmitted over 8 sequential channel bursts and that the speech information that would normally be transmitted is discarded. When received, the FACCH message is reassembled into its original message structure.

Table of Contents

Introduction to Global System for Mobile Communication (GSM)

GSM Services

-Voice Services
-Data Services
-Multicast Services
-Short Messaging Services
-Location Based Services (LBS)

GSM Products (Mobile Devices)

-Subscriber Identity Module (SIM)
-Mobile Telephones
-PCMCIA Air Cards
-Embedded Radio Modules
-External Radio Modems

GSM Radio

-Frequency Allocation
-Frequency Reuse
-Time Division Multiple Access (TDMA)
-RF Power Control
-Mobile Assisted Handover (MAHO)

Digital Audio and Baseband

-Analog to Digital Conversion (ADC)
-Digital Speech Compression (Speech Coding)
-Channel Coding
-Echo Cancellation

Radio Channels

-Channel Bandwidth
-Modulation
-Duplex Channels
-Radio Channel Structure
-Time Slot Structure
-Frame Structure
-MultiFrame Structure
-Slow Frequency Hopping
-Discontinuous Reception (Sleep Mode)
-Discontinuous Transmission (DTx) Operation
-Dynamic Time Alignment

Logical Channels

-Traffic Channels
-Control Channels
-Dedicated Control Channel Signaling
-Traffic Channel Signaling

GSM Network

-Base Stations
-Repeaters
-Switching Centers
-Network Databases
-Wireless Network System Interconnection
-Customized Applications for Mobile Network Enhanced Logic (CAMEL)

Device Addressing

-Mobile Station ISDN (MSISDN)
-International Mobile Subscriber Identity (IMSI)
-International Mobile Equipment Identifier (IMEI)
-Temporary Mobile Station Identity (TMSI)

GSM System Operation

-Mobile Telephone Initialization
-Updating Location (Registration)
-Waiting for Calls (Idle)
-System Access
-Mobile Call Origination
-Transferring Calls Between Cell Sites (Handover)
-Receiving a Call on a Mobile Telephone
-Conversation Mode
-Connected Mode
-Authentication

GSM Future Evolution

-Enhanced Data for Global Evolution (EDGE)
-Wideband Code Division Multiple Access (WCDMA)