bluetooth vicky

8/9/2019 Bluetooth vicky

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Seminar on

BLUETOOTH

Presented By:

Abinash Ojha

Reg. No.-0501206108Branch-ENTC

Ajay-Binay Institute Of Technology,CTC


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CONTENTSIntroduction

What is Bluetooth?

Origin of the name

Technology Of Bluetoothy Network Arrangement

y How it Works?

y Connection Protocol

y Connection Control

y Data Transmission

y Packetsy Transmission types and rates

y PowerClass

y Control of linkConnection

y Hardwire Architecture

Radio Frequency

Basebandy ErrorCorrection and Security

Future of Bluetooth

Conclusion


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Introduction

Bluetooth is a revolutionary device

launched by two L.M. Ericsson

Telephone Employees the Swedish bornSven Mattisson and his Dutch colleague,

Jaap Haartsengy in 1994.


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Origin of the name Bluetooth

The name Bluetooth comes from

a tenth century Danish king,

Harald Bluetooth Blatand


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What is Bluetooth?

Bluetooth is a low cost, world wide wireless

transferring technology that enables short-range wirelessconnections between desktop and laptop computers,

personal digital assistants (PDAs), cellular phones,

printers, scanners, digital cameras, keyboard, mouse and

even home appliances. It delivers opportunities for rapidad-hoc connections.

The Bluetooth wireless technology comprises

hardware, software and interoperability requirements.

Bluetooth is actually a standard for wirelesscommunications between devices in a Personal Area

network (PAN) using radio frequency. Since Bluetooth

utilizes a radio-based link, even if the devices are not in

line of sight they can communicate with each other.


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How Bluetooth Work?Does not require line-of-sight positioning of connected units.

Uses modifications of existing wireless LAN techniques

The circuits are contained on a circuit board 0.9cm square.

They can then establish a 1 megabit/s link.

The protocols will handle both voice and data.

It uses tiny, inexpensive, short-range transceivers

Operates on the radio band 2.4 GHz

Bluetooth modules in a PC can be built in as a PC card or

externally attached via the USB port.


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The maximum range is 10 meters .

Protected from radio interference by frequency hopping.

Bluetooth radio typically hops faster and uses shorter packets.

A master unit can communicate with up to seven slave units.

Each device has 48-bit address


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Connection ProtocolBluetooth connections are established via

the following techniques:

Standby

Page/Inquiry

Active

Hold

SniffPark


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Connection Control


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Data transmission

Data can be transmitted bothsynchronously and asynchronously

The Synchronous ConnectionOriented(SCO) method is used

primarily for voice.

The Asynchronous Connection Less

(AC

L) is primarily for data.


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Transmission types and RatesThe baseband (single channel per line)

protocol combines circuit and packet

switching.

Circuit switching can be either

asynchronous or synchronous .

Each synchronous channel can support a

64 Kb/s transfer rate

An asynchronous channel can transmit

as much as 721 Kb/s in one direction

and 57.6 Kb/s in the opposite direction.


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Packets

Each packet has 72-bits access code, 54-bits

header and payload of variable size.


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Power Class

Power Class Power Range

1 100 mW 100m

2 2.5 mW 20m

3 1 mW 10m


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Control of link connections

Controller

Sending and receiving data.

Paging and inquiries.

Setting up connections.

Authentication.

Determining SCO o r ACL.

Determining the frame type of each packet.


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Future for Bluetooth

The report from In-Stat Group says

shipments of Bluetooth chips have

surpassed 50 million in 2002.By 2009

In-Stat expects more than 670 million

Bluetooth chipsets to be shipped.


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Conclusion

It has to go for some improvement. Because,

as we have discussed the range is very small.

Data rate is only 1 mbps. So these have to go forimprovement. It has to accommodate real-time

video.


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www.bluetooth.org

www.howstuffworks.com

www.google.com

www.palowireless.com

References


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