Cellular networks
The increasing lack of frequencies in the radio telephone services
led to the development of cellular networks in the 70’s.
The Bell Telephone company (US) introduced the first cellular
public network AMPS (Advanced Mobile Phone Service) in 1978.
It became a single standard for North America in 1982.
The idea behind cellular networks is the sub-division of a
geographical area covered by a network into a number of
smaller areas called cells. The frequencies allocated to one cell
can be reused in other cells that are far enough not to disturb.
A fixed radio station called as a base station within each cell acts
as a transmitter/receiver serving all the mobile stations inside the