Wireless Communication Bluetooth Technology

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WIRELESS COMMUNICATIONBLUETOOTH TECHNOLOGY

V.Himavardhan reddy&

S.sharma



What Is Wireless Communication?

Wireless Communication - History

What Is Bluetooth?

Why Bluetooth?

How Does It Work?

Who Started Bluetooth?

Timeline

Bluetooth¶s Future

Advantages (+)

Disadvantages (-)

Conclusion



What Is Wireless Communication?

The term "wireless" has become ageneric and all-encompassing word used todescribe communications in which

electromagnetic waves carry a signal over part or the entire communication path.

Wireless communication is the transfer of information over a distance without the use of electrical conductors or "wires".



Wireless Communication History-

History The preThe pre--electromagnetic past.electromagnetic past.

1864: James Clerk Maxwell proved the1864: James Clerk Maxwell proved the

existence of electromagnetic waves.existence of electromagnetic waves.

1920: First commercial radio broadcast 1920: First commercial radio broadcast (in Pittsburgh).(in Pittsburgh).



Wireless Communication - History

1935: First telephone call around the1935: First telephone call around theworld.world.

1984: Initial deployment of AMPS1984: Initial deployment of AMPScellular system.cellular system.



What Is Bluetooth?

³Bluetooth wirelesstechnology is anopen specification for

a low-cost, low-power, short-rangeradio technology for ad-hoc wireless

communication of voice and dataanywhere in theworld.´



Why Bluetooth?

It¶s wireless.

It¶s simple.

It¶s inexpensive. Open platform.

Provision for both

voice and data.



How Does It Work?

Bluetooth is a standard for tiny, radio frequency chipsthat can be plugged intoyour devices.

These chips were designedto take all of the informationthat your wires normallysend, and transmit it at aspecialfrequency to something

called a receiver Bluetooth chip.

The information is thentransmitted to your device



Who Started Bluetooth?

19941994 ² ² Ericsson study on aEricsson study on a wireless technology to link wireless technology to link mobile phones &mobile phones &

accessories.accessories. companies joined to formcompanies joined to form

the Blue tooth Specialthe Blue tooth SpecialInterest Group (SIG) inInterest Group (SIG) in1998.1998.

companies joined to formcompanies joined to formthe Blue tooth Specialthe Blue tooth SpecialInterest Group (SIG) inInterest Group (SIG) in1998.1998.

First model of First model of Ericsson Blue toothEricsson Blue toothdevice.device.



Timeline

1994 : Ericsson study complete / vision

1995 : Engineering work begins

1997 : Intel agrees to collaborate

1998 : Bluetooth SIG formed: Ericsson, Intel, IBM, Nokia& Toshiba

1999 : Bluetooth Specification 1.0A SIG promoter groupexpanded: 3Com, Lucent, Microsoft & Motorola

2000 : Bluetooth Specification 1.0B, 2000+ adopters

2001 : First retail products released, Specification 1.1

2003 : Bluetooth Specification 1.2

2005 : Bluetooth Specification 2.0 (?)



Bluetooth Goals & Vision

Originally conceived as a cable replacementtechnology

Short-Range Wireless Solutions

Open Specification Voice and Data Capability

Worldwide Usability

Other usage models began to develop:

Personal Area Network (

P AN) Ad-hoc networks

Data/voice access points

Wireless telematics



TypicalBlue tooth ScenarioTypicalBlue tooth Scenario

Blue tooth is a standard for tiny, radioBlue tooth is a standard for tiny, radiofrequency chips that can be plugged intofrequency chips that can be plugged into

your devices your devices

The information is then transmitted to your The information is then transmitted to yourdevicedevice

These chips were designed to take all of the These chips were designed to take all of theinformation that your wires normally send,information that your wires normally send,

and transmit it at specialand transmit it at special frequency tofrequency tosomethingsomething called a receiver Blue tooth chip.called a receiver Blue tooth chip. Each channel is divided into time slots 625Each channel is divided into time slots 625

microseconds longmicroseconds long



Typical Blue tooth ScenarioTypical Blue tooth Scenario

Data in a packet can be up to 2,745 bits inData in a packet can be up to 2,745 bits inlengthlength

Packets can be up to five time slots widePackets can be up to five time slots wideHas been set aside by the ISM for exclusiveHas been set aside by the ISM for exclusiveuse of Blue tooth wireless productsuse of Blue tooth wireless products

uses a technique calleduses a technique called spreadspread--spectrumspectrumfrequency hopping.frequency hopping.

In this technique, a device will use 79In this technique, a device will use 79individual, randomly chosen frequenciesindividual, randomly chosen frequencies

within a designated range within a designated range



Bluetooth vs. Ir D Bluetooth

Point to Multipoint

Data & Voice

Devices can be

mobile

Range 10 m

IrD

Point to point

Intended for Data

Communication

Both devices must be

stationary, for synchronization

Range 1 m



VariousBlue tooth DevicesVariousBlue tooth Devices



When twoB

lue tooth Devices Link UpWhen twoB

lue tooth Devices Link Up



Bluetooth¶s Futureetooth¶s

Future The future of this technology becoming

a standard is likely with a strong

industry pushing behind it, success isinevitable.

Bluetooth will soon be known as Bluetooth 2.1 as

they are trying to develop the product to better fulfill

the needs of consumers.



Advantages (+)

Widely Used

Feature Simplicity

Free of Charge

Go Wireless!

Your in Control



advantagDisadvantages (-)es (-)

Bluetooth Internet

Battery Use



Conclusion

As you can notice that there are quite a

bit of advantages and fewer

disadvantages. Overall, Bluetooth is agreat thing to be using on all your

devices that supports it. You can do so

much with it and includes cutting all the

cords attached to your devices.



The End

³Things that think«

don¶t make sense unless they link.´

Wireless Communication Bluetooth Technology

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