1st Generrattion Cellllullarr Charractterriisttiics
• Widespread Introduction in early 1980s• Analogue modulation
• Frequency Division Multiple Access
• Voice traffic only
• No inter-network roaming possible
• Insecure air interface
The 1st Generation of Cellular
Technology makes use of analogue
modulation techniques such as FM
1.3 1st Generation Cellular Systems
1. Introduction to Cellular Systems
In early networks, the emphasis was to provide radio coverage with little consideration for
the number of calls to be carried. As the subscriber base grew, the need to provide greater
traffic capacity had to be addressed.
1stt Generation Standards
• AMPS (Analogue Advanced Mobile Phone System)• North American Standard in cellular band (800MHz)
• TACS (Total Access Communications System)
• UK originated Standard based on AMPS in 900MHz band
• NMT (Nordic Mobile Telephony System)
• Scandinavian Standard in 450MHz and 900MHz bands
• C-450
• German Standard in 450MHz band
• JTACS (Japanese Total Access Communications System)
• Japanese Standard in 900MHz band
Analogue/AMPS
Nokia 252
1st Generation Planning
• Macrocellular• High sites for coverage driven planning
• Antennas above roof height
• Frequency planning required
• For networks with more cells than frequencies
these must be planned
• Large cell size
• Order 30km
• Hard handover
• Mobile only ever connected to a single cell
• Hexagonal Grid Representation