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Organized By
Pimpri Chinchwad College of Engineering
Nigadi, Pune.
National Level Symposium
Techlligent 2012
17th-18th Feb.2012
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Bluetooth Wireless Technology ( BWT )
Jitesh T. Patil & Manish S. Chaudhari
Department of Computer Engineering
S.S.V.P’s B.S.Deore College of Engineering, Dhule. 424002 (M.S.)
E-mail:[email protected]
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The present paper provides an overview of Bluetooth wireless
technology and instructs users on how to establish Bluetooth connections.Bluetooth technology provides a low cost, low power and low complexity
solution for ad-hoc wireless connectivity.
Bluetooth technology represents an opportunity for the industry to
deliver wireless solutions that are ubiquitous across a broad range of
devices.
Bluetooth technology represents an opportunity for the industry to
deliver wireless solutions that are ubiquitous across a broad range ofdevices.
Bluetooth is a specification for the use of wirelessly link phones,
computers and other network devices over short distances.
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Abstract…
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Piconet
Scatternet
Master unit
Slave unitMAC address
Parked units
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BWT-enabled devices operate in the unrestricted 2.4-gigahertz (GHz)Industrial, Science, Medical (ISM) band. The ISM band ranges between
2.400 GHz and 2.483 GHz.
BWT-enabled devices use a technique called frequency hopping to
minimize eavesdropping and interference from other networks that use
the ISM band. With frequency hopping, the data is divided into smallpieces called packets. The transmitter and receiver exchange a data
packet at one frequency, and then they hope to another frequency to
exchange another packet. They repeat this process until all the data is
transmitted.
There are three classes of BWT radio devices, each with a different
maximum range: Class 1 (100 m)
Class 2 (50 m)
Class 3 (10 m)
Cont….. 7
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Bluetooth Network Arrangement
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BWT-enabled devices form network topologies called
piconets and scatternets.A piconet consists of up to eight
BWT-enabled devices. A piconet consists of up to eight BWT-
enabled devices.
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Bluetooth Security is provided in three ways:
1.Through pseudo-random frequency band hops
2. Authentication.
3.Encryption.
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When link security is enabled, Bluetooth devices must
complete an initial "bonding" exchange to derive pairwise linkauthentication and encryption keys.
The user must give both devices the same PIN code, which is
then mixed with a factory-defined unit key.
In order to reduce risk ….
Devices should be paired in a private location, using a
long, random PIN code.
Avoid default PIN codes,
Easily guessed PIN codes ("0000") and devices that
do not support configurable PIN codes.After bonding, paired Bluetooth devices associate to each
other whenever they want to exchange data.
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Bluetooth Model is used
voice/data access
points
peripheralinterconnects
Personal AreaNetworking (PAN).
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Voice/data access points is one of the key initial usage models and
involves connecting a computing device to a communicating
device via a secure wireless link
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The second category of uses, per ipheral interconnects , involves
connecting other devices together. Imagine standard keyboards,
mice, and joysticks that work over a wireless link.
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The last usage model, Personal Area Networking (PAN ), focuses
on the ad-hoc formation and breakdown of personal networks
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It separates the frequency band into hops. This spread spectrum is used to
hop from one channel to another, which adds a strong layer of security.
Signals can be transmitted through walls and briefcases, thus eliminating the
need for line-of-sight.
Devices do not need to be pointed at each other, as signals are
omni-directional.
Governments worldwide regulate it, so it is possible to utilize the samestandard wherever one travels
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a) Wireless synchronisation – you can eliminate wires along with
improving safety with Bluetooth. You need not worry about carryingconnection cables while travelling with your laptop or other wireless
devices.
b) Universally accepted - Bluetooth technology is accepted world wide,
with it gaining so much popularity, you can rely on it for years to comewith an advent of more and more devices started to use Bluetooth
technology. 2.5 GHz radio frequency ensures worldwide operability.
c) Avoids interference from other wireless devices - Bluetooth devices
avoid interference from other wireless devices with the usage of
technique known as frequency hopping, and low power wirelesssignals.
d) Faster data and voice Sharing – you can share data and voice
communications via Bluetooth with compatible devices connected to
it.
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a) Since Bluetooth is omni-directional, it encounters problems in
discovering the intended recipient device.
b) The only real downsides are the data rate and security. Infrared can
have data rates of up to 4 MBps, which provides very fast rates for datatransfer, while Bluetooth only offers 1 MBps.
c) Although there are very few disadvantages, Bluetooth still remains the
best for short range wireless technology. Those who have tried it love it,and they know for a fact that Bluetooth will be around for years to
come.
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Peripherals such as mice, keyboards, and printers,Cell phones withBluetooth technology have been sold in large numbers, as they are able
to connect to computers, PDAs (Personal Data Assistant), and various
other devices.
Bluetooth technology headsets for smart phones and cell phones. The
transfer of files, images and MP3, between mobile phones.
Certain MP3 players and digital cameras to transfer files to and fromcomputers.
Data logging equipment that transmits data to a computer via Bluetooth
technology. 18
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1) The official Bluetooth site, http://www.bluetooth.com
2) http://www.intel.com/mobile/bluetooth
3) Wikipedia.com
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