Transcript SEMINAR ON BLUETOOTH

TO
SEMINAR ON
BLUETOOTH
PRESENTED BY :TAPAN KUMAR MALLIK
ADMN.NO:05CSE/01
What is BLUETOOTH?
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It is an open specification for short-range wireless connections. It
works on a globally available band (2.45GHz) for worldwide
compatibility. Based on a low-cost, short-range radio link, Bluetooth
makes a global de facto standard for wireless connectivity which is
intended to connect desktop and laptop computers, mobiles,
palmtops, printers, scanners, digital cameras and even home
appliances.
As a new technology for wireless connectivity, Bluetooth technology
cuts the wires that used to tie up digital devices. Based on a lowcost, short-range radio link, Bluetooth technology can connect many
types of digital devices without a single cable in sight, giving you
more freedom to roam. And that, after all, is what mobility is all
about.
the radio frequency used is globally available, Bluetooth technology
can offer fast and secure access to wireless connectivity all over the
world.
Why Bluetooth so named?
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Harald Bluetooth was king of Denmark in the
late 900s. He managed to unite Denmark and
part of Norway into a single kingdom.
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Choosing this name for the standard indicates
how important companies from the Baltic region
(nations including Denmark, Sweden, Norway
and Finland) are to the communications industry,
even if it says little about the way the technology
works.
Bluetooth basics
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Bluetooth is a standard developed by a group of
electronics manufacturers that allows any sort of
electronic equipment -- from computers and cell phones
to keyboards and headphones -- to make its own
connections, without wires, cables or any direct action
from a user. Bluetooth is intended to be a standard that
works at two levels:
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It provides agreement at the physical level -- Bluetooth is
a radio-frequency standard.
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It also provides agreement at the next level up, where
products have to agree on when bits are sent, how many
will be sent at a time and how the parties in a
conversation can be sure that the message received is
the same as the message sent.
Features of Bluetooth
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It's wireless. When you travel, you don't have to worry
about keeping track of a briefcase full of cables to attach
all of your components, and you can design your office
without wondering where all the wires will go.
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It's inexpensive.
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You don't have to think about it. Bluetooth doesn't
require you to do anything special to make it work. The
devices find one another and strike up a conversation
without any user input at all.
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Its nominal link range is from 10 cm to 10 meters, which
can be extended to 100 meters by increasing the
transmit power.
How Bluetooth works?
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Many desktop computer systems have a CPU unit
connected to a mouse, a keyboard, a printer and so on.
A personal digital assistant (PDA) will normally connect to
the computer with a cable and a docking cradle.
A TV will normally connect to a VCR and a cable box, with a
remote control for all three components.
A cordless phone connects to its base unit with radio waves,
and it may have a headset that connects to the phone with a
wire.
In a stereo system, a CD player and other audio devices
connect to the receiver, which connects to the speakers.
When you use computers, entertainment systems or
telephones, the various pieces and parts of the systems
make up a community of electronic devices. These devices
communicate with each other using a variety of wires,
cables, radio signals and infrared light beams, and an even
greater variety of connectors, plugs and protocols.
Specifications
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The devices in a piconet (Personal Area Network) share
a common communication data channel. The channel
has a total capacity of 1 megabit per second (Mbps).
Headers and handshaking information consume about
20 percent of this capacity.
A data channel change frequency randomly 1,600 times
per second between the 79 (or 23) RF channels.
Each channel is divided into time slots 625
microseconds long.
A piconet has a master and up to seven slaves. The
master transmits in even time slots, slaves in odd time
slots.
Packets can be up to five time slots wide.
Data in a packet can be up to 2,745 bits in length.
There are currently two types of data transfer between
devices: SCO (synchronous connection oriented) and
ACL (asynchronous connectionless).
Getting Personal
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. Bluetooth technology can give you a new kind of
freedom. You might share information, synchronize data,
access the Internet, integrate with local area networks
(LANs), or even unlock your car - all by simply using
your mobile phone with Bluetooth wireless technology
At first, Bluetooth technology will begin to replace the
cables that connect various digital devices.
Bluetooth technology will also allow you to surf the Web
with your laptop while your phone is in your bag, or
effortlessly exchange information such as calendar
appointments or contact addresses with your colleagues
all without a single wire.
Bluetooth technology might also be used in mobile
imaging. By combining the ease of multimedia
messaging with digital photography, mobile imaging is a
clear indication of the potential of Bluetooth wireless
technology.
Special Interest Group
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The Bluetooth Special Interest Group (SIG) is a trade
association comprised of leaders in the
telecommunications, computing, automotive, industrial
automation and network industries that is driving the
development of Bluetooth wireless technology, a low
cost short-range wireless specification for connecting
mobile devices and bringing them to market.
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The Bluetooth SIG includes promoter member
companies Agere, Ericsson, IBM, Intel, Microsoft,
Motorola, Nokia and Toshiba, and thousands of
Associate and Adopter member companies.
Examples
There are lots of different ways that electronic devices
can connect to one another. For example:
 Many desktop computer systems have a CPU unit
connected to a mouse, a keyboard, a printer and so on.
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A personal digital assistant (PDA) will normally connect
to the computer with a cable and a docking cradle.
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A TV will normally connect to a VCR and a cable box,
with a remote control for all three components.
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A cordless phone connects to its base unit with radio
waves, and it may have a headset that connects to the
phone with a wire.
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In a stereo system, a CD player and other audio devices
connect to the receiver, which connects to the speakers.
Bluetooth on mobile phone
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Bluetooth technology is one of the key technologies
that can make the mobile world possible, blurring the
boundaries between home, the office, and the outside
world.
You receive an automatic text message notifying you
that your children are safely back from school.
While waiting in the airport lounge, tempting duty-free
offers are sent directly to your mobile phone.
Entertain yourself by playing multiplayer games with
your friends.
After you write emails on your laptop, the messages
can be sent by your phone.
You could even use your mobile phone to control the
lock and alarm of your car, or integrate it with the car's
stereo so you can talk hands free when you're on the
go.
Applications
Data Exchange
 LAN Access
 Dial-up Networking
 Voice Applications
 Security Issues
 Instant Messaging
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Conclusion
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Bluetooth Technology is being developed
as an open specification
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It allows a quick proliferation of the
technology through a wide range of mobile
products and devices
Piconet 1
Piconet 2
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Bridge Slave
Bluetooth Architecture
1.The basic unit of blue tooth system is a piconet, which
consists of a master node and up to seven active slave
nodes within a distance of 10 meters.
2.Multiple piconet can exists in the same room and can be
connected via a bridge node.
3.An interconnected collection of piconets is called a
scatternet.
4.The reason for the master slave design is to facilitate the
implementation of bluetooth chips for lower cost.
5.Piconet acts as a centralized TDM system where the
master controlling the clock and determine which device to
communicate in which time slot.
6. All communication is between master and
slave.
7.Direct slave-slave communication is not
possible.
BLUETOOTH APPLICATION
1.The bluetooth V1.1 specification names 13
specific application.
2.This specification provides different
protocol stacks for each application.
3.The 13 applications are called as profiles.
BlueTooth
1.In 1994, the L.M.Ericsson company
became interested in connecting mobile
phones with other devices (Ex:- PDA) with
out cables.
2.Together with 4 other companies (IBM,
INTEL, TOSHIBA, NOKIA) it formed a
SIG. (Special Interest Group)
3.The project is named as Bluetooth.