Cellular network

Top of a cellular radio tower
Indoor cell site in Germany

A cellular network or mobile network is a telecommunications network where the link to and from end nodes is wireless and the network is distributed over land areas called cells, each served by at least one fixed-location transceiver (typically three cell sites or base transceiver stations). These base stations provide the cell with the network coverage which can be used for transmission of voice, data, and other types of content. A cell typically uses a different set of frequencies from neighboring cells, to avoid interference and provide guaranteed service quality within each cell.[citation needed][1]

When joined together, these cells provide radio coverage over a wide geographic area. This enables numerous portable transceivers (e.g., mobile phones, tablets and laptops equipped with mobile broadband modems, pagers, etc.) to communicate with each other and with fixed transceivers and telephones anywhere in the network, via base stations, even if some of the transceivers are moving through more than one cell during transmission.

Cellular networks offer a number of desirable features:[1]

  • More capacity than a single large transmitter, since the same frequency can be used for multiple links as long as they are in different cells
  • Mobile devices use less power than with a single transmitter or satellite since the cell towers are closer[2]
  • Larger coverage area than a single terrestrial transmitter, since additional cell towers can be added indefinitely and are not limited by the horizon
  • Capability of utilizing higher frequency signals (and thus more available bandwidth / faster data rates) that are not able to propagate at long distances
  • With data compression and multiplexing, several video (including digital video) and audio channels may travel through a higher frequency signal on a single wideband carrier

Major telecommunications providers have deployed voice and data cellular networks over most of the inhabited land area of Earth. This allows mobile phones and mobile computing devices to be connected to the public switched telephone network and public Internet access. Private cellular networks can be used for research[3] or for large organizations and fleets, such as dispatch for local public safety agencies or a taxicab company.[2]

  1. ^ a b Guowang Miao; Jens Zander; Ki Won Sung; Ben Slimane (2016). Fundamentals of Mobile Data Networks. Cambridge University Press. ISBN 978-1107143210.
  2. ^ a b "Be Mobile, Stay Connected | PMN". Privatemobilenetworks.com. Archived from the original on 14 January 2019. Retrieved 23 November 2013.
  3. ^ Tom Simonite (24 January 2013). "Google's Private Cell Phone Network Could Be a Threat to Cellular Carriers | MIT Technology Review". Technologyreview.com. Archived from the original on 29 October 2013. Retrieved 23 November 2013.

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