Nov 15, 2014

History of ‘cell phone’


We would like to provide the general awareness on the topic “ Why we are calling it as cell phone?”.

Everybody knows cell phone, but how many of you people know why we call it as cell phone? It is in small size so we call it as cell phone? Is it? Absolutely no. It is using the concept of cell in global system for mobile communication technology.

a. The basic idea of a cellular network is to partition the available frequency range, to assign only parts of that frequency spectrum to any base transceiver station, and to reduce the range of a base station in order to reuse the scarce frequencies as often as possible.
b. One of the major goals of network planning is to reduce interference between different base stations.
c. Anyone who starts thinking about possible alternatives should be reminded that current mobile networks operate in frequency ranges where attenuation is substantial. In particular, for mobile stations with low power emission, only small distances (less than 5 km) to a base station are feasible.

      Besides the advantage of reusing frequencies, a cellular network also comes with the following disadvantages:
a. An increasing number of base stations increases the cost of infrastructure and access lines.
b. All cellular networks require that, as the mobile station moves, an active call is handed over from one cell to another, a process known as handover.
c. The network has to be kept informed of the approximate location of the mobile station, even without a call in progress, to be able to deliver an incoming call to that mobile station.