| Topic : Mobile wireless technology |
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Source : http://developers.sun.com
Activity:
5 comments
604 views
last activity : 07 06 2010 20:18:04 +0000
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Extract
Electronic devices connect to one another in a variety of ways: A cable connects a computer's processing unit to a display, a data cable and a docking cradle connect a personal digital assistant (PDA) or a cellular phone to a computer, radio waves connect a cordless phone to its base unit, an infrared beam connects a remote control to a television. The elaborate array of connectors among electronic devices cries out for a better solution. That's where Bluetooth comes in.
Bluetooth is a completely different way to form connections between electronic devices in close proximity. You can think of it as a cable-replacement technology, but its applications are limited only by our imaginations. Bluetooth does more than just replace cables. It is a radio-frequency technology that uses the 2.4 GHz Industrial-Scientific-Medical (ISM) band. If you have a baby monitor or a garage-door opener you're already using the ISM band.
This two-part series of articles will show you how to use J2ME and Bluetooth to develop next-generation wireless applications for tomorrow's market. This first article covers the basics of Bluetooth; the next one will concentrate on using the Java APIs for Bluetooth Wireless Technology (JSR 82) to develop Java technology-enabled applications for Bluetooth-enabled devices. This article starts by presenting a brief overview of the technology, then explains:
- The differences between Bluetooth and two similar technologies, infrared and 802.11b
- Features and future applications
- The architecture of Bluetooth and its protocol stack
- Network topologies
- Procedures for establishing connections
- The role of profiles
- Security considerations
- Products now on the market
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