Networks
Mobile phone Networks are the way in which mobile phone companies make sure that customers are allowed to enjoy mobile technology in a seamless and uninterrupted manner. The basic principle behind cellular Networks is to provide a grid of cells across a large area of land which provides customers with the ability to stay in contact without a break in service.
Networks also have the advantage of being able to re-use individual frequencies without causing any interference to other mobile device operators. They also have the advantage of being able to use computer technology to switch those frequencies in the phone without the owner having to do so manually. As a phone user crosses the boundary between two cells on the radio network, the base station will assign a new frequency. The mobile handset will recognise the frequency and re-tune to it, without any delay in communication.
The size of the cells across Networks varies greatly and depends on factors such as topography. Because it is a radio based system, signals may become blocked by tall buildings, hills or trees.
A second factor influencing the size of a network’s cells is the amount of mobile phone usage in an area. In a city, the space between base stations will typically be no more than 0.5km apart, whereas in the countryside they can be as far as 5km apart.
The other factor governing the spacing of cells in Networks is the frequency of the radio signal. Higher frequencies require smaller cells.