Wireless technology offers convenience and flexibility. Some people will call this free-dom from being entangled with the wire. The success of wireless technology in Cellular telephones or Wireless MAN (Metropolitan Area Network) made people look at using the technique in Wireless LAN and Wireless Personal Area Network (WPAN). Techniques for WPANs are infrared and radio waves. Most of the Laptop computers sup-port communication through infrared, for which standards have been formulated by IrDA (Infrared Data Association—wwwirda.org). Through WPA.N, a PC can communi-cate with another IrDA device like another PC or a Personal Digital Assistant (PDA) or a Cellular phone. The other best known PAN technology standard is Bluetooth. Bluetooth uses radio instead of infrared. It offers a peak over the air speed of about I Mbps over a short range
Introduction 7
of about 10 meters. The advantage of radio wave is that unlike infrared it does not need a line of sight. WPAN works in ad hoc mode only.
Introduction 7
of about 10 meters. The advantage of radio wave is that unlike infrared it does not need a line of sight. WPAN works in ad hoc mode only.
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