Wireless Communications
Wireless Communication is everywhere. People around the world regularly send and receive messages wirelessly, that is, transmitted through the air. Three types of wireless communications include wireless messaging services, wireless internet access points and global positioning systems People use mobile phones, PDA’s and other mobile devices to access text messages, instant messaging, and picture messaging services . Through text messaging services, users send and receive short text messages, which usually consist of fewer than 300 characters. Wireless instant messaging is an internet communications service that allows a wireless mobile device to exchange instant messages with one or more mobile devices or online personal computers. Users send graphics, pictures, video clips, sound files, and short text messages with picture messaging services.1 In many public locations, people connect to the internet through a wireless Internet access point using mobile computers and devices.

Two types of wireless internet access points are hot spots and 3G networks. A hot spot is a wireless network that allows mobile users to check e-mail, browse the web, and access any Internet service –as long as their computers or devices have the appropriate wireless capability A 3G network, which uses cellular radio technology, enables users to connect to the Internet through a mobile phone or computer equipped with an appropriate PC Card. A global positioning system (GPS) is a navigating system that consists of one or more earth based receivers that accept and analyze signals sent by satellites in order to determine the receiver’s geographic location, according to Shelly and Cashman. A GPS receiver is a handheld, mountable, or embedded device that contains an antenna, a radio receiver, and a processor. Many mobile devices, such as mobile phones and PDA’s, have GPS capability built into the device. Mobile users communicate wirelessly through wireless messaging services, wireless Internet access points, and global positioning systems. Anyone can take advantage of wireless communications using mobile computers and devices.

Habika, Davies. “Text Messaging, Instant Messaging, and Picture Messaging Services .” Computing in Today’s World January 2008: 34-32. Podpora, Maxine
C., Albert D. Ruiz. Advanced in Wireless Internet Access Point Technology. Dallas : Wells Publishing , 2008. Shelly, Gary B., and Thomas J. Cashman. How a GPS Works. Course Technology. 21 March 2008 .

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