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What is Bluetooth ?

Bluetooth is the key to enabling wireless personal area networks (WPAN) that connect devices in close proximity or short range radio devices. WPAN is being standardized by the IEEE 805.15 working group and is largely based in the Bluetooth Special Interest Group (SIG) specifications. Bluetooth

encompasses both a standard communications interface and a low-cost computer chip. Bluetooth as a technology was conceived by Ericsson in 1994 and in 1998 the Bluetooth SIG trade association was founded by Nokia, Ericsson, IBM, Intel and Toshiba. The specifications and IPR for Bluetooth belong to the SIG. Today the Bluetooth SIG has over 1900 members.

Bluetooth operates in the globally available 2.45 GHz ISM 'free band' and provides low-cost, low power, robust, secure, efficient, high capacity, ad hoc voice and data networking of up to 1 Mb/sec, in a range of 10 meters. Unlike IRDA it does not require line of sight allowing devices to communicate with each other from pockets, bags and around corners.

Products available today that support Bluetooth include: Access Points, cable replacement, cordless phones, embedded devices, PDAs, headset, mobile phones, modems, PC Cards, portable PCs, printers, USB Devices and car kits.

Bluetooth (802.15) and WLAN (802.11b) are complementary and many portable PCs include both.

What Bluetooth is not?

Bluetooth is by its nature not designed to carry heavy traffic loads. It is not suitable as a replacement to LAN-, WAN- and Backbone cables. Nor is it, by its nature, suitable in server-based applications. The emphasis in Bluetooth is on mobile, re-configurable computerized units that need sporadic contact with each other.

Who was Bluetooth?

Harald Bluetooth was king of Denmark in the 10th century. He united Denmark and part of Norway into a single kingdom. He left a large monument, the Jelling rune stone, in memory of his parents.

Bluetooth Topologies

The fundamental building blocks of a Bluetooth topology are the Master and the Slave unit, where the Master unit in the piconet provides the clock and hopping sequence to synchronize all other devices in the piconet. The master also numbers the communication channels.

1. Piconets limited to 8 units:

a) Peer to Peer (or one master and one slave)
b) Multi-slave (up to 7 "slaves" with one master)

2. Scatternet

c) Several piconets in communication

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The official Bluetooth info site

IEEE Wireless Standards Zone
The IEEE leads the way in developing open, leading-edge consensus standards for Wireless Local Area Networks (Wireless LANs), Wireless Personal Area Networks (Wireless PANs), and Wireless Metropolitan Area Networks (Wireless MANs).

The Bluetooth Weblog
An informal approach to learning about the Bluetooth wireless world

Palowireless Bluetooth Resource Centre
A comprehensive web guide and further links to information on the Bluetooth technology

The latest Bluetooth news from ZDNet UK | | | | | | | |

Copyrightę1999-2003 , Samir Saadi KHAYAT. All rights reserved