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Wireless communication is the
transfer of information over a distance without the use of electrical conductors
or "wires". in which electromagnetic waves carry and transmit the
communication signal .It encompasses various types of fixed, mobile, and portable two way radios,
cellular telephones, personal digital assistants (PDAs), and wireless
networking. GPS units, garage door
openers and or garage doors, wireless computer mice, keyboards and headsets,
satellite television and cordless telephones .
But the best known example of wireless technology is the cellular telephone
and modems. These instruments use radio waves to enable the operator to make
phone calls from many locations world-wide. They can be used anywhere that there
is a cellular telephone site to house the equipment that is required to transmit
and receive the signal that is used to transfer both voice and data to and from
these instruments.
Wireless can be divided into
fixed wireless ,
Mobile wireless ,
Portable wireless ,
IR wireless,
List of emerging technologies Include:
Short-range point-to-point communication : Wireless microphones, Remote
controls, IrDA, RFID (Radio Frequency Identification), Wireless USB, DSRC
(Dedicated Short Range Communications), EnOcean, Near Field Communication
Wireless sensor networks : ZigBee, EnOcean; Personal area networks, Bluetooth,
Ultra-wideband (UWB from WiMedia Alliance).
Wireless computer networks: Wireless Local Area Networks (WLAN), (IEEE 802.11
branded as WiFi and HiperLAN), Wireless Metropolitan Area Networks (WMAN) and
Broadband Fixed Access (BWA) (LMDS, WiMAX, WANKA
More
specialized and exotic examples of wireless communications and control include:
Global System for Mobile Communication (GSM) -
General Packet Radio Service (GPRS)
Enhanced Data GSM Environment (EDGE)
Universal Mobile Telecommunications System (UMTS)
Wireless Application Protocol (WAP)
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