what is bluetooth and its full information?
development of bluetooth technology , features of bluetooth and its application
Bluetooth is an industrial specification for wireless personal area networks (PANs). Bluetooth provides a way to connect and exchange information between devices such as mobile phones, laptops, PCs, printers, digital cameras, and video game consoles over a secure, globally unlicensed short-range radio frequency. The Bluetooth specifications are developed and licensed by the Bluetooth Special Interest Group.
Bluetooth is a radio standard and communications protocol primarily designed for low power consumption, with a short range (power-class-dependent: 1 metre, 10 metres, 100 m) based on low-cost transceiver microchips in each device.
Bluetooth lets these devices communicate with each other when they are in range. The devices use a radio communications system, so they do not have to be in line of sight of each other, and can even be in other rooms, as long as the received transmission is powerful enough.
In order to use Bluetooth, a device must be compatible with certain Bluetooth profiles. These define the possible applications and uses.
List of applications
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More prevalent applications of Bluetooth include:
-Wireless control of and communication between a cell phone and a hands-free headset or car kit. This was one of the earliest applications to become popular.
-Wireless networking between PCs in a confined space and where little bandwidth is required.
-Wireless communications with PC input and output devices, the most common being the mouse, keyboard and printer.
-Transfer of files between devices with OBEX.
-Transfer of contact details, calendar appointments, and reminders between devices with OBEX.
-Replacement of traditional wired serial communications in test equipment, GPS receivers, medical equipment and traffic control devices.
-For controls where infrared was traditionally used.
-Sending small advertisements from Bluetooth enabled advertising hoardings to other, discoverable, Bluetooth devices.
-Seventh-generation game consoles—Nintendo Wii[2], Sony PlayStation 3—use Bluetooth for their respective wireless controllers.
Bluetooth is implemented in a variety of new products such as phones, printers, modems, and headsets. Bluetooth is acceptable for situations when two or more devices are in proximity to each other and don’t require high bandwidth. Bluetooth is most commonly used with phones and hand-held computing devices, either using a Bluetooth headset or transferring files from phones/PDAs to computers.
Bluetooth also simplifies the discovery and setup of services. Bluetooth devices advertise all services they provide. This makes the utility of the service that much more accessible, without the need to worry about network addresses, permissions and all the other considerations that go with typical networks.
Bluetooth Development
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The Bluetooth specification was developed in 1994 by Sven Mattisson and Jaap Haartsen, who were working for Ericsson Mobile Platforms in Lund, Sweden.The specifications were formalized by the Bluetooth Special Interest Group (SIG). The SIG was formally announced on May 20, 1998. Today it has over 7000 companies worldwide. It was established by Ericsson, Sony Ericsson, IBM, Intel, Toshiba, and Nokia, and later joined by many other companies. Bluetooth is also known as IEEE 802.15.1.
Bluetooth challenges
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Bluetooth has several positive features and one
would be extremely hard pressed to find downsides
when given the current competition. The only real
downsides are the data rate and security. Infrared
can have data rates of up to 4 MBps, which provides
very fast rates for data transfer, while Bluetooth
only offers 1 MBps.
For this very reason, infrared has yet to be
dispensed with completely and is considered by
many to be the complimentary technology to that
of Bluetooth. Infrared has inherent security due
to its line of sight.
The greater range and radio frequency (RF) of
Bluetooth make it much more open to interception and
attack. For this reason, security is a very key
aspect to the Bluetooth specification.
For more bluetooth info-
http://www.bluetooth.com/
http://en.wikipedia.org/wiki/Bluetooth
http://electronics.howstuffworks.com/bluetooth.htm
http://www.wirelessdevnet.com/channels/bluetooth/features/bluetooth.html
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