Mobile

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Generazioni di telefonia cellulare

0 G NMT, RTMS
1 G TACS, ETACS, AMPS, NMT

  • Total Access Communication System
  • Cella, stazione base, ufficio terminale MTSO (Mobile Telephone Switching Office), ufficio terminale rete fissa
  • Commutazione di circuito
  • Frequenze: 800-900 MHz
  • Multiplexing: FDM
2 G GSM, D-AMPS, PDC

  • Groupe Spécial Mobile
  • Global System for Mobile communications
  • Frequenze: 900 MHz – 1800 MHz (dual band)
  • Multiplexing: FDM e TDM
2.5 G GPRS

  • General Packet Radio Service
  • Rete a pacchetti IP su GSM esistente
2.75 G EDGE

  • Enhanced Data rates for GSM Evolution
  • EGPRS, Enhanced GPRS
3 G UMTS, CDMA2000

  • Universal Mobile Telecommunications System
  • Commutazione di pacchetto
  • Frequenze: 1900 MHz – 2100 MHz
  • Protocollo W-CDMA, Wideband Code Division Multiple Access
3.5 G HSPA

  • High Speed Packet Access
  • HSDPA, …Download…
  • HSUPA, …Upload…
4 G …

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