wireless communication bluetooth technology
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8/9/2019 Wireless Communication Bluetooth Technology
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WIRELESS COMMUNICATIONBLUETOOTH TECHNOLOGY
V.Himavardhan reddy&
S.sharma
8/9/2019 Wireless Communication Bluetooth Technology
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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
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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".
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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).
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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.
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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.´
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Why Bluetooth?
It¶s wireless.
It¶s simple.
It¶s inexpensive. Open platform.
Provision for both
voice and data.
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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
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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.
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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 (?)
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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
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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
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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
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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
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VariousBlue tooth DevicesVariousBlue tooth Devices
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When twoB
lue tooth Devices Link UpWhen twoB
lue tooth Devices Link Up
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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.
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Advantages (+)
Widely Used
Feature Simplicity
Free of Charge
Go Wireless!
Your in Control
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advantagDisadvantages (-)es (-)
Bluetooth Internet
Battery Use
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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.
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