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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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About us |
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LibanPhone.com is the
first Lebanese Internet telephone directory. This website contains
professional information related to Voice over IP applications and software.
Also you can find valuable information about GSM and mobile telephony.
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Links
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 Bluetooth
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
ZDNet
UK
The latest Bluetooth news from ZDNet UK |
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