Cell size:
- 100 m in cities to 35 km on the country side (GSM)
- even less for higher frequencies
- Umbrella cell: large cell that includes several smaller cells
A void frequent handoffs for fast moving traffic
Cell shape:
- Hexagonal is useful for theoretical analysis
- Practical footprint (radio coverage area) is amorphous
BS placement:
- Center-excited cell: BS near center of call
Omni-directional antenna
- Edge-excited cell: BSs on three of the six cell vertics
sectored directional antennas