Page 7 - WIRELESS TECHNOLOGIES- BLUETOOTH AND WI-FI

A.BLUETOOTH

A.1 Introduction

Bluetooth is a wireless technology standard for exchanging data over short distances (using short-
wavelength UHF radio waves in the ISM band from 2.4 to 2.485 GHz) from fixed and mobile devices, and
building personal area networks (PANs)

Bluetooth technology facilitates the replacement of cables normally used to connect one device
to another by a short range radio link. With the help of blue tooth we can operate our keyboard
and mouse without direct connection of CPU. Printers, fax machines, headphone, mouse,
keyboard or any other digital devices can be part of Bluetooth system.

In spite of facilitating the replacement of cables, Bluetooth technology works as an
universal medium to bridge the existing data networks, a peripheral interface for existing devices
and provide a mechanism to form short ad hok network of connected devices away from fixed
network infrastructures.

Due to their independence on short range radio link, Bluetooth devices do not require a
line of site connection in order to communicate. Therefore a computer can print information on a
printer if printer is in inside the room. Two blue tooth devices can talk to each other when they
come within range of 10 meters to each other.

Bluetooth technology represents an opportunity for the industry to deliver wireless
solutions that are ubiquitous across a broad range of devices.

The name Bluetooth

Bluetooth creates a secure means of exchanging wireless data amongst several different devices.
Pondering this service, its predominantly Scandinavian creators recalled the legend of Danish
viking king Harald Blåtand. According to lore, Blåtand had an uncanny ability to bring people
together in non-violent negotiations. His way with words and communication went so far as
uniting Denmark and Norway as a single territory. The English translation of Blåtand is blue-
tooth.

Fig A.1.1 Bluetooth Logo