PPT Slide

GSM (3G)

• 3G data rate requirements
  • 144 kbps at driving speed
  • 384 kbps outside stationary speed
  • 2Mbps for indoors speed
• GSM + GPRS + EDGE achieve 3G
  • GPRS added to allow dynamic use of multiple channels and speeds up to 115 kbps (2.5 G)
  • EDGE (Enhanced Data Rates for Global Evolution) added to allow speeds up to 384 kbps
• GSM uses SIM (subscriber identity module) cards to identify user, network, etc.

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