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Practically every cellular system has some kind of broadcast mechanism. This can be used directly for distributing information to multiple mobiles. Commonly, for example in mobile telephony systems, the most important use of broadcast information is to set up channels for one-to-one communication between the mobile transceiver and the base station.
A tactical communications system is a communications system that (a) is used within, or in direct support of tactical forces (b) is designed to meet the requirements of changing tactical situations and varying environmental conditions, (c) provides securable communications, such as voice, data, and video, among mobile users to facilitate ...
JTAGS: Japan Total Access Communication System; 2G: Second-generation wireless telephone based on digital technology. 2G networks are only for voice communications, except that some standards can also use SMS messages as a form of data transmission. GSM: Global System for Mobile Communications; iDEN: Integrated Digital Enhanced Network
This system of dividing the medium into channels according to frequency is called frequency-division multiplexing. Another term for the same concept is wavelength-division multiplexing, which is more commonly used in optical communications when multiple transmitters share the same physical medium.
A smartphone is a tool of mobile computing. Mobile computing is human–computer interaction in which a computer is expected to be transported during normal usage and allow for transmission of data, which can include voice and video transmissions. Mobile computing involves mobile communication, mobile hardware, and mobile software ...
These cellular systems were based on US Advanced Mobile Phone Service (AMPS) technology, the modified technology being named Total Access Communication System (TACS). Use of an early mobile phone in Austria, 1964. In 1947, Bell Labs was the first to propose a cellular radio telephone network. The primary innovation was the development of a ...
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The Global System for Mobile Communications (GSM) is a standard developed by the European Telecommunications Standards Institute (ETSI) to describe the protocols for second-generation digital cellular networks used by mobile devices such as mobile phones and tablets.