Bluetooth Technology New

7/29/2019 Bluetooth Technology New

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Bluetooth Technology


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Introduction

Bluetooth is a wireless technology for creating personal

networks operating in the 2.4 GHz unlicensed band, with

a range of 10 meters.

Bluetooth is a high

-

speed, low

-

power microwave wirelesslink technology.

Designed to connect phones, laptops, PDAs and other

portable equipment together with little or no work by the

user.


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History

Started in 1994 by Ericsson Mobile

Communication.

Low-power radio interface.

1998, the Bluetooth SIG was formed.

1999, companies like Microsoft, 3 Com,

Motorola and Lucent joined the SIG.


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Name

The heart of the Bluetooth brand identity is the

name

Which refers to the Danish king Harald

Bluetooth

In the beginning of the Bluetooth wireless

technology era, Bluetooth was aimed at unifying

the telecom and computing industries.


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Logo

A Scandinavian firm originally designed the logo.

The logo unites the Runic alphabetic characters

"H", which looks similar to an asterisk.

"B", which are the initials for Harald Bluetooth.

If you look close enough you can see both

embodied in the logo.


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Users

Bluetooth is a standard and a communicationsprotocol primarily designed for low power

consumption, with a short range.

Readily available in most modern mobile phonesand laptop computers.

Also used with accessories such as wireless

headphones and gaming controllers, etc.


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Bluetooth Protocol

Extends upto 10 metres.

Uses globally available 2.4GHz ISM band.

79 channels of 1MHz each.

Hop frequency is 1600 hops/second.

Uses ARQ, CRC, FEH for reliability.

Each device identified with 48bit unique address(IEEE 802)

Follows a strict master-slave scheme Master can have up to 7 active slaves connected

in a piconet


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Bluetooth devices

Bluetooth Dongle

Bluetooth Headset

Bluetooth mouse Key board


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1999 - Bluetooth 1.0 Specification is introduced.

2003 Version 2.1.

2004 Bluetooth Version 2.0 + EDR (Enhanced Data Rate)

2005 Devices using Version 2.0 + EDR

2007 Bluetooth Core Specification Version 2.1 + EDR

2009 Bluetooth Core Specification Version 3.0 + HS (High Speed)

Bluetooth versions


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Security Overview

In Bluetooth, key generation is generally basedon a Bluetooth PIN, which must be entered into

both devices.

This procedure might be modified if one of thedevices has a fixed PIN

During pairing, an initialization key or master key

is generated, using the E22 algorithm


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Health concerns

Bluetooth uses the microwave radio frequencyspectrum in the 2.4 GHz to 2.4835 GHz range.

Maximum power output from a Bluetooth radio is

100 mW, 2.5 mW, and 1 mW for Class 1, Class 2,and Class 3.

Accordingly, Class 2 and Class 3 Bluetooth devices

are considered less of a potential hazard thanmobile phones.


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Advantages

No line of site restrictions as with IrDA.Low power consumption makes integrated inbattery powered devices very practical.

2.4 GHz radio frequency ensures worldwideoperability.

Qualification program ensures that productsdisplaying the Bluetooth logo have been tested to

meet stringent expectations for ease of use.Tremendous momentum not only within thecomputer industry but other industries like cellular

telephones and transportation.


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Disadvantages

Early stages of development make Bluetooth an

immature technology that will need to prove itself

Bluetooth shares the same frequency range as

802.11b Wireless LAN products (i.e. 2.4GHz)


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Problems

Vulnerable to Bluesnarfing, Blue jacking,

Wireless networks open pathways for security

breaches.


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THANK YOU

Bluetooth Technology New

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