Bluetooth Wireless Technology (BWT)


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Organized By Pimpri Chinchwad College of Engineering Nigadi, Pune. National Level Symposium Techlligent 2012 17 th -18 th Feb.2012

Bluetooth Wireless Technology ( BWT ):

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.) 2

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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 of devices. Bluetooth is a specification for the use of wirelessly link phones, computers and other network devices over short distances. 3 Abstract…


Introduction The name Bluetooth is borrowed from Harald Bluetooth, a king in Denmark more than 1,000 years ago. In keeping with its namesake, Bluetooth, the new low-cost radio technology, is designed to unite or connect all different types of devices to effectively work as one. Bluetooth Wireless Technology (BWT) was developed in 1994 at Ericsson in Sweden. Bluetooth wireless technology is an inexpensive, short-range radio technology that eliminates the need for proprietary cabling between devices notebook PCs, handheld PCs. It operates in the 2.4 GHz ISM band and is based on a low-cost, short- range radio link that facilitates ad-hoc connections for stationary and mobile communication environments. 4

Quick Terminology… :

Quick Terminology… Piconet Scatternet Master unit Slave unit MAC address Parked units 5

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How BWT works…:

How BWT works… 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 small pieces 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

Bluetooth Network Arrangement:

Bluetooth Network Arrangement 8 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.

Security of BWT…:

Security of BWT… Bluetooth Security is provided in three ways: 1.Through pseudo-random frequency band hops 2. Authentication. 3.Encryption . 9

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10 When link security is enabled, Bluetooth devices must complete an initial "bonding" exchange to derive pairwise link authentication 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.

Models used in BWT:

Models used in BWT 11 Bluetooth Model is used voice/data access points peripheral interconnects Personal Area Networking (PAN).

Voice/Data Access Points:

Voice/Data Access Points 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 12

Peripheral Interconnects:

Peripheral Interconnects The second category of uses, peripheral interconnects , involves connecting other devices together. Imagine standard keyboards, mice, and joysticks that work over a wireless link. 13

Personal Area Networking (PAN):

Personal Area Networking (PAN) The last usage model, Personal Area Networking (PAN ), focuses on the ad-hoc formation and breakdown of personal networks 14

Bluetooth Features:

Bluetooth Features 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 same standard wherever one travels 15

Advantages of BWT:

Advantages of BWT Wireless synchronisation – you can eliminate wires along with improving safety with Bluetooth. You need not worry about carrying connection cables while travelling with your laptop or other wireless devices. Universally accepted - Bluetooth technology is accepted world wide, with it gaining so much popularity, you can rely on it for years to come with an advent of more and more devices started to use Bluetooth technology. 2.5 GHz radio frequency ensures worldwide operability. 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 wireless signals. Faster data and voice Sharing – you can share data and voice communications via Bluetooth with compatible devices connected to it. 16


Disadvantages Since Bluetooth is omni-directional, it encounters problems in discovering the intended recipient device. 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 data transfer, while Bluetooth only offers 1 MBps. 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. 17

Applications of BWT :

Applications of BWT Peripherals such as mice, keyboards, and printers,Cell phones with Bluetooth 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 from computers. Data logging equipment that transmits data to a computer via Bluetooth technology. 18


Bibliography The official Bluetooth site, http :// 19

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20 Thank You

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