M-Commerce
...services and portable devices that send and receive data, text, voice and video. Cell phones and pagers are the most widely used mobile wireless products today, and many routine daily activities rely on the voice communications and messaging services supported by these devices. New technologies are emerging that will support wireless remote monitoring, wireless financial transactions, wireless Internet access, and wireless control of appliances and devices. Mobile wireless developments are evolving so rapidly, that it is difficult to keep up with the latest advances and to make purchasing decisions. This on-line tutorial strives to provide a brief background on the history of wireless development, a general overview of mobile wireless technologies that are available today, and some predictions for the future.
History of Wireless Technology
Marconi's radio: The origins of wireless communications date back to the 1890s with Marconi's work in radio and wireless telegraphy. Since then, advances have come through a sequence of discoveries and advancements. In 1898, Marconi produced the first commercial radio service (data only) linking a radio transmitter with a receiver over 7.5 miles away. In December of 1900, the first voice radio link was demonstrated. Radio communications were of natural interest to the shipping industry, and the government established ship to shore communications requirements in 1910. By 1918, 5700 ships had wireless telegraphy. Advertisement for a Wireless Telegraph(Scientific American, November 25, 1905)Police radios to CBs: Another valuable wireless communications service was initiated when the Detroit Police institute issued the first radio dispatch in 1921, operating in 2 MHz band. Detroit Police radio dispatch equipment in 1925
Pagers to Cell Phones: In the 1980s, the Regional Bell Operating Companies (RBOC) emerged after...
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