A mobile radio system in which an area is broken up into cells. Every cell is handled by one transceiver (receiver/transmitter). As a cellular mobile radio moves from one cell to another, it is “handed off” to the next cell by a master computer, which determines from which cell the signal is strongest.
Technology that uses radio transmissions to access telephonecompany networks. Service is provided in a particular area by a low-power transmitter.
A form of broadcast radio that broadcasts using antennae located inside honeycomb-shaped cells.
Form of broadcast radio used widely for mobile communications, specifically wireless modems and cellular telephones. 9.36- 37, 9.38
The technology that has made large scale mobile telephony possible. Current cellular networks reuse the same radio frequencies by assigning them to cells far enough apart to reduce interference. A cell is the geographical area covered by one radio base station transmitting/receiving in the center. The size of each cell is determined by the terrain, transmission power, and forecasted number of users. Service coverage of a given area is based on an interlocking network of cells, called a cell system.
Cellular Radio is the technology responsible for making made wide scale mobile telephony possible. Before the existence of cellular radio the problem with the concept of the mobile phone was how to facilitate large numbers of users sharing only small amounts of the radio spectrum. Cellular radio solved this problem. It works by allowing the re-use of radio frequencies that are the same by assigning them to cells that are far enough apart thus preventing any noticeable interference. FDMA, or Frequency Division Multiple, was the basis for the first generation cellular radio systems. The second generation cellular radio systems support high bit rate voice and limited data communications and use digital techniques such as CDMA and TDMA. Third generation (3G) systems are now becoming more popular, actually support voice and high bit rate data. This allows mobile multimedia applications (please also see Narrowband, Wideband).
A term for cellular telephony services provided by personal communications systems (PCS).
Radio frequency-based communication service over which voice or data is transmitted. The service area is divided into cells each served by a transmitter.
A radio telephone system in which a network of transmitters links mobile users into the public phone system. Each transmitter or 'base station' serves a small area known as a cell.