What is Bluetooth?
Monday, October 18, 2004
A wireless personal area network (PAN) technology from the Bluetooth Special Interest Group (www.bluetooth.com) founded in 1998 by Ericsson, IBM, Intel, Nokia and Toshiba. Bluetooth is an open standard for short-range transmission of digital voice and data between mobile devices (laptops, PDAs, phones) and desktop devices. It supports point-to-point and multipoint applications.
Bluetooth provides up to 720 Kbps data transfer within a range of 10 meters and up to 100 meters with a power boost. Unlike IrDA, which requires that devices be aimed at each other (line of sight), Bluetooth uses omnidirectional radio waves that can transmit through walls and other non-metal barriers. Bluetooth transmits in the unlicensed 2.4GHz band and uses a frequency hopping spread spectrum technique that changes its signal 1600 times per second. If there is interference from other devices, the transmission does not stop, but its speed is downgraded.
The name Bluetooth comes from King Harald Blatan (Bluetooth) of Denmark. In the 10th century, he began to Christianize the country. Ericsson (Scandinavian company) was the first to develop this specification.
This post is related to News and Informative, technology
One thing that I would like to add, Bluetooth takes up a lot of "Battery" for the mobile devices.. So switch it off when not required.. BTW Dinesh, you should include something which will tell about the 802.16 WLan protocol, since you already know something on 802.11.